JP6615410B1 - Reservoir pond decontamination method including environmental measures - Google Patents

Reservoir pond decontamination method including environmental measures Download PDF

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JP6615410B1
JP6615410B1 JP2019511798A JP2019511798A JP6615410B1 JP 6615410 B1 JP6615410 B1 JP 6615410B1 JP 2019511798 A JP2019511798 A JP 2019511798A JP 2019511798 A JP2019511798 A JP 2019511798A JP 6615410 B1 JP6615410 B1 JP 6615410B1
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excavation
stirring
water
bottom mud
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手塚　隆
隆 手塚
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RYUUKI CO.,LTD.
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C9/00—Special pavings; Pavings for special parts of roads or airfields
    • E01C9/08—Temporary pavings
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/92—Digging elements, e.g. suction heads
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses

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  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
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  • Life Sciences & Earth Sciences (AREA)
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  • Soil Sciences (AREA)
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  • Processing Of Solid Wastes (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Fertilizers (AREA)

Abstract

【課題】本発明は、特に、放射性物質を含む雨水排水によって土壌等が高濃度に汚染された雨水調整池等の土壌層の除染作業において、泥濘んだ軟らかい土壌を、無限軌道による装軌車両を用いて掘削作業を行っても、土壌を撹拌することなく、また、打設した支持杭の撤去によって池の底を抜き、調整池等の本来の機能を発揮しなくなる問題を生じさせない汚染土壌層の掘削工法の提供。【解決手段】支持杭を打設する支持杭打設工程と敷板を敷設する敷板敷設工程と掘削工程と敷板の撤去工程と敷板撤去後の掘削工程と杭頭切断工程とから構成され、敷板敷設工程は、敷設された敷板の上を装軌車両が次の敷板を搬送して連設施工するという一連の工程と前記支持杭打設工程を繰り返すことで装軌車両の搬送路を施工するものであり、掘削工程は、敷板を撤去しながら掘削するものであり、杭頭切断工程は、掘削し終わった掘削面に合わせて杭頭を切断処理する手段を採用した。【選択図】図１Disclosed is a method for removing mud and soft soil in an endless track, particularly in decontamination work of soil layers such as rainwater control ponds and the like in which soil is contaminated at a high concentration by rainwater drainage containing radioactive substances. Contamination that does not cause a problem that even if excavation work is performed using a vehicle, the soil is not agitated, and the bottom of the pond is removed by removing the installed support pile, and the original function of the adjustment pond is not performed. Provide soil layer excavation method. SOLUTION: A support pile placing process for placing a support pile, a spread sheet laying process for laying a spread sheet, a drilling process, a spread sheet removing process, a drilling process after removing the spread sheet, and a pile head cutting process. The process is to construct the track of the tracked vehicle by repeating a series of steps in which the tracked vehicle transports the next floor plate and continuously constructs it on the laid plate and the support pile placing step. In the excavation process, excavation is performed while removing the floorboard, and in the pile head cutting process, means for cutting the pile head in accordance with the excavated surface after excavation is adopted. [Selection] Figure 1

Description

本発明は、溜池における汚染土壌を除去する工法に関し、詳しくは、調整池等の除染作業において、水の引いている軟土地部分では装軌車両の無限軌道による土壌の撹拌を防止し、効果的な掘削作業を行う汚染土壌層の掘削工法を用いることを基本とし、水が溜まっている水溜まり部では、底に溜まった底泥を水ごと吸引して、底泥を分離回収する撹拌剥離式吸引装置を用いた撹拌剥離式吸引システムを利用する撹拌剥離式吸引工法も利用可能とする溜め池総合除染工法に関するものである。   The present invention relates to a method for removing contaminated soil in a basin, and in particular, in decontamination work such as in a regulating pond, preventing soil agitation due to an endless track of a tracked vehicle in soft land portions where water has been drawn. The basic method is to use the excavation method of contaminated soil layer, which conducts general excavation work, and in the water reservoir where water is accumulated, the agitation and separation method that sucks the bottom mud collected at the bottom together with the water and separates and collects the bottom mud The present invention relates to a reservoir pond comprehensive decontamination method that makes it possible to use a stirring and peeling type suction method using a stirring and peeling type suction system using a suction device.

平成２３年３月１１日に発生した東北地方太平洋沖地震により、東京電力福島第一原子力発電所が被災し、大量の放射性物質が環境中に放出され、福島県のみならず東日本の各地において、放射性物質による環境の汚染と、これに伴う人の健康又は生活環境への影響が危惧されており、これら影響を速やかに低減することが喫緊の課題となっている。調整池や溜め池等は、集中豪雨などの局地的な出水により、河川に流れ込む雨水を一時的に溜め、下流の河川や下水道雨水管への負担を軽減し、又は農業水利施設であって、一般の人たちの立ち入りが出来ないようにフェンス等で囲われるなどの管理がされ、調整池や溜め池内の放射線量が直接市民生活に影響を与えるものでないと、それ以前は考えられていた。   The Tohoku-Pacific Ocean Earthquake that occurred on March 11, 2011 caused damage to TEPCO's Fukushima Daiichi Nuclear Power Station, and a large amount of radioactive material was released into the environment. Contamination of the environment with radioactive materials and the resulting impact on human health or the living environment are feared, and it is an urgent task to quickly reduce these effects. Regulating ponds and ponds, etc. are used to temporarily collect rainwater that flows into rivers by local flooding such as torrential rain, reduce the burden on downstream rivers and sewer storm drains, or are agricultural irrigation facilities. Prior to this, it was thought that the amount of radiation in the regulating pond and reservoir would not directly affect citizens' lives, such as being surrounded by a fence so that ordinary people could not enter.

しかしながら、雨水排水が集まる雨水調整池では、土壌・落葉等が集積するため、そこに放射性物質が濃集（蓄積）し、高い濃度の放射性物質が観測されている。多くの地方自治体が公表しているとおり、雨水調整池や溜め池、或いは下水道管理調整池等の放射線量測定結果が各自治体の規定する放射線量を大幅に超えているところがあり、特別措置法が制定された現在では、調整池等も局所的汚染箇所として認定されるケースが少なくない。
係る調整池等は、泥濘んだ軟らかい富栄養化した腐葉土壌であり、また、水分を多く含んでいることからバックホー等の装軌車両を持ち込んで土壌を掘削すると、無限軌道により土壌を混ぜ込んでしまうという事態が生じる。また、鉄板等の敷板を敷設するに先立ち、多数の杭を打設することとなるが、除染後に係る杭を撤去しようとして引き抜くと、池の底を抜いてしまい、調整池等の機能を発揮しなくなるという問題がある。However, in rainwater control ponds where rainwater drainage collects, soil and fallen leaves accumulate, so radioactive substances concentrate (accumulate) there, and high concentrations of radioactive substances are observed. As many local governments have announced, there are places where the radiation dose measurement results of rainwater control ponds, reservoirs, or sewer management ponds etc. greatly exceed the radiation doses prescribed by each local government, and the Special Measures Law is Currently enacted, there are many cases where regulated ponds etc. are recognized as locally contaminated areas.
Such adjustment ponds are mud, soft, eutrophied humus soil, and because they contain a lot of water, if you bring a tracked vehicle such as a backhoe and excavate the soil, the soil is mixed in an endless track. A situation occurs. In addition, many stakes will be placed prior to laying the slats such as iron plates, but if the stakes are removed to remove the stakes after decontamination, the bottom of the pond will be pulled out, and the function of the regulating pond etc. There is a problem that it does not show.

そこで、従来より、係る問題を解決しようと、種々の技術が提案されている。具体的には、例えば、発明の名称を「汚染土壌の除染装置及び除染方法」とする技術が開示され公知技術となっている（特許文献１参照）。「簡易な構成で容易に設置・撤去でき、除染 作業を無人化し、さらに汚染土壌の除染対象範囲を土壌深層部に拡大することを課題とし、具体的には、除染装置は、土壌表面に敷設する電極シートと、電極シートを貫通して除染対象領域の土壌に差し込む複数の電極杭３と、汚染土壌中に浸透する浸透液と、汚染土壌中の浸透液の拡散を止める止水剤とを具備する。電極シートには、導電材及び汚染 物質吸着剤又は汚染物質分解剤を含む。電極杭は、注入口と吐出口が連通し、先端の電極部に上端のボルト端子が電気的に導通し、先端部を除く側面に絶縁被覆部を備える。絶縁被覆部の上端部にゴムブッシュを介して電極シートを押え込む押え片が突出させ、ボルト端子を設ける。電極シートと電極杭の間に直流電圧を印加し、浸透液が拡散した汚染土壌中の汚染物質を動電現象により電極シートに誘引する。」というものである。しかしながら、特許文献１には、汚染土壌の除染方法が記載され、シート状の電極部材を撤去することで、放射性物質が回収できるということから、本発明と同様に、重機の無限軌道等による撹拌・混ぜ込みがないという利点で共通しているものの、セシウムはイオン化傾向が大きいことから環境中でセシウム単体として存在する可能性は低く、化合物として土壌や樹木、様々な構造物等に付着して存在しているものと考えられ、電極部材に吸着させるための電極シートに吸着できる土量の絶対量は少なく、また、電極杭を撤去することにより、池の底抜きを起こす原因となるおそれもあり、本発明が対象とする空池の汚染土壌の除染には向かないものと考えられる。   Thus, various techniques have been proposed in the past to solve such problems. Specifically, for example, a technique in which the name of the invention is “contaminated soil decontamination apparatus and decontamination method” has been disclosed and is known (see Patent Document 1). “It was easy to install and remove with a simple configuration, unmanned decontamination work, and to further expand the scope of decontamination of contaminated soil to the deep soil area. Specifically, decontamination equipment An electrode sheet laid on the surface, a plurality of electrode piles 3 penetrating through the electrode sheet and inserted into the soil of the decontamination target area, an osmotic solution penetrating into the contaminated soil, and stopping the diffusion of the osmotic solution in the contaminated soil The electrode sheet contains a conductive material and a pollutant adsorbent or a pollutant decomposer.The electrode pile communicates with the injection port and the discharge port, and the upper end bolt terminal is connected to the tip electrode part. Electrically conductive and provided with an insulating coating on the side surface excluding the tip, a pressing piece for pressing the electrode sheet through a rubber bush is projected at the upper end of the insulating coating, and a bolt terminal is provided. DC voltage is applied between the piles and the permeate diffuses And the contaminant contaminated soil to attract the electrokinetic phenomenon electrode sheet. "Is that. However, Patent Document 1 describes a decontamination method for contaminated soil, and the radioactive material can be recovered by removing the sheet-like electrode member. Although common in the advantage of no agitation and mixing, cesium has a high ionization tendency, so it is unlikely to exist as cesium alone in the environment, and it adheres to soil, trees, various structures, etc. as a compound. The absolute amount of soil that can be adsorbed to the electrode sheet for adsorbing to the electrode member is small, and removing the electrode piles may cause the bottom of the pond to bottom out Therefore, it is considered that the present invention is not suitable for decontamination of soil contaminated by empty ponds.

また、発明の名称を「表土移植工法及び表土剥き取り機構」とする技術が開示され公知技術となっている（特許文献２参照）。「各種土木工事に当り、表土の自然環境及び生態 系を破壊することなくそのままそっくり移転し得る表土移植工法及び表土移植具並びに表土剥き取り機構の提 供することを課題とし、具体的には、予め、移植領域の剥き取り開始周辺部域に亙り所要深さを掘り取って表土段差を形成して置き、適宜手段を用いて表土段差に先端を臨ませた表土移植具により移植領域の所要深さまでの表土層を破壊することなく自然の状態を保持して差し込み剥き取、次いで、当該表土層を満載したまま当該表土移植具を運搬具として用いて適宜運搬手段に積載し移植目的地まで運搬し、その後、当該運搬手段から表土移植具を吊り上げて移植場所の真上まで持来し、引き続き、移植場所に降ろして行き、移植地面上に表土層をそつくり敷き詰めて移植を完了してなる特徴的構成手法の採用。」というものである。しかしながら、特許文献２に記載の発明は、堆積している土砂を浚渫するに際し、装軌車両の無限軌道で撹拌してしまうおそれがあると考えられる。   Moreover, the technique which makes the name of invention "a topsoil transplanting construction method and a topsoil peeling mechanism" is disclosed, and it is a well-known technique (refer patent document 2). `` In the various civil engineering works, the challenge was to provide a topsoil transplanting method, topsoil transplanting tool and topsoil stripping mechanism that can be transferred as it is without destroying the natural environment and ecosystem of the topsoil. , Start to peel off the transplant area, dig up the required depth to form a topsoil step and place it to the required depth of the transplant area with a topsoil transplanter with the tip facing the topsoil step using appropriate means While maintaining the natural state without destroying the topsoil layer of the soil, it is inserted and peeled off, and then the topsoil transplanter is loaded as a transporter with the topsoil layer fully loaded and appropriately transported to the transplant destination. Then, lift the topsoil transplantation tool from the transporting means and bring it to the top of the transplantation site, then lower it to the transplantation site, and spread the topsoil layer on the transplantation ground to complete the transplantation Adoption of the characteristic configuration method to be Te. "Is that. However, it is considered that the invention described in Patent Document 2 may stir on an endless track of a tracked vehicle when dripping accumulated sediment.

また、発明の名称を「放射性セシウム含有土壌の処理方法」とする技術が開示され公知技術となっている（特許文献３参照）。「除染効率を向上させるとともに、廃棄物発生量を低減することのできる放射性セシウム含有土壌の処理方法を提供することを課題とし具体的には、放射性セシウムを含有する土壌を重液によって異なる比重の複数種の土壌に分離する比重分離工程と、前記比重分離された土壌に含まれるセシウムを除去するセシウム除去工程とを備える放射性セシウム含有土壌の処理方法を手段とする。」というものである。しかしながら、特許文献３に記載の発明は、重液を用いて比重を異ならせ、セシウム濃度の高い層と低い層に分離し、分離された土壌に含まれたセシウムを除去する方法について記載があるが、分離された土壌の除却手段については記載は無く、重機の移動のために鉄板等の敷板を敷設する工法に関する技術は皆無である。   Moreover, the technique which makes the name of invention "the processing method of radioactive cesium containing soil" is disclosed, and it is a well-known technique (refer patent document 3). “I wanted to provide a method for treating radioactive cesium-containing soil that can improve the decontamination efficiency and reduce the amount of waste generated. Specifically, the specific gravity of soil containing radioactive cesium differs depending on the heavy liquid. A method of treating radioactive cesium-containing soil comprising a specific gravity separation step of separating into a plurality of types of soil and a cesium removal step of removing cesium contained in the soil separated by specific gravity. However, the invention described in Patent Document 3 describes a method for removing cesium contained in separated soil by separating the specific gravity using a heavy liquid, separating the layer into a layer having a high cesium concentration and a layer having a low cesium concentration. However, there is no description about the means for removing the separated soil, and there is no technique related to a construction method for laying a floor plate such as an iron plate for moving heavy machinery.

また、東日本大震災による福島第一原子力発電所の事故により放射性物質が広範囲に放出され 、その除染が大きな問題となっていることは前記の通りであるが、これら放射性物質は雨水によって徐々に湖沼等に運ばれ細かな泥に吸着された状態で底に堆積する。よって、湖沼等の除染にはこれら放射性物質が吸着した底泥を回収し、処理することも重要である。   In addition, as mentioned above, radioactive materials were released extensively due to the Fukushima Daiichi nuclear power plant accident caused by the Great East Japan Earthquake, and decontamination of these materials has become a major problem. It is transported to the bottom and deposited on the bottom while adsorbed by fine mud. Therefore, it is also important to collect and treat the bottom mud adsorbed with these radioactive substances for decontamination of lakes and the like.

このような湖沼等の底泥の浚渫装置として、例えば下記［特許文献４］に記載の発明が挙げられる。この［特許文献４］に記載の発明は、湖沼の水面にベース船を浮かべ、このベース船から吸引ポンプを搭載した吸引体を吊下げ、湖沼の底に堆積した底泥を水ごと吸 引して陸側の処理装置に圧送する技術である。しかしながら、湖沼等の底には枯死した植物が堆積していたり、水草や抽水植物の根等 が生い茂っている場合が多く、［特許文献４］に記載の吸引体ではこれらの異物が吸引口を詰まらせて吸引能力を著しく悪化させる。このため、定期的に吸引体を引き上げて吸引口に詰まった異物を除去する必要があり、作業効率が極めて悪いという問題点がある。   As a dredging device for bottom mud such as lakes and marshes, for example, the invention described in [Patent Document 4] below can be cited. In the invention described in [Patent Document 4], a base ship is floated on the surface of a lake, a suction body equipped with a suction pump is suspended from the base ship, and the bottom mud deposited on the bottom of the lake is sucked together with water. This is a technology that pumps to the land-side processing equipment. However, in many cases, dead plants are accumulated on the bottom of lakes and marshes, and the roots of aquatic plants and water-drawn plants are overgrown. In the suction body described in [Patent Document 4], these foreign substances enter the suction port. Clogging causes the suction capacity to deteriorate significantly. For this reason, it is necessary to periodically pull up the suction body to remove the foreign matter clogged in the suction port, and there is a problem that the working efficiency is extremely poor.

特開２０１７−１３６５１５号JP 2017-136515 A 特開２００２−１８６３１４号JP 2002-186314 A 特開２０１６−２００４３７号JP 2016-200337 A 特開２０１４−８０７９７号公報JP 2014-80797 A

本発明は、特に、放射性物質を含む雨水排水によって土壌等が高濃度に汚染された雨水調整池、溜め池等の土壌層の除染作業において、水分を多く含み泥濘んだ軟らかい土壌を、無限軌道による装軌車両を用いて掘削作業を行っても、土壌を撹拌することなく、また、打設した支持杭の撤去によって池の底を抜いてしまい、調整池等の本来の機能を発揮しなくなるという問題を生じさせない汚染土壌層の掘削工法の提供、並びに、その汚染土壌層の掘削工法の提供とともに、水生植物等の異物を細かに切断して吸引する撹拌剥離式吸引装置を用いた撹拌剥離式吸引システムを利用する撹拌剥離式吸引工法を含めることができ、また、この富栄養化した底泥を処理再利用し、地球環境に対し負荷を軽減させることができる溜め池総合除染工法の提供を課題とする。 In particular, the present invention is applicable to infinite decontamination of mud and soft soils that contain a lot of moisture in decontamination work of soil layers such as rainwater adjustment ponds and reservoirs in which soil is contaminated at high concentrations by rainwater drainage containing radioactive substances. Even when excavation work is carried out using a tracked vehicle, the bottom of the pond is pulled out without agitation of the soil and the support piles that have been laid are removed, and the original functions of the regulating pond etc. are demonstrated. Providing excavation method for contaminated soil layer that does not cause the problem of disappearance, as well as excavation method for contaminated soil layer, and stirring using an exfoliation type suction device that finely cuts and sucks foreign matter such as aquatic plants Reservoir integrated decontamination method that can include agitation exfoliation type suction method using exfoliation type suction system, and can reduce the burden on the global environment by processing and reusing this eutrophic bottom mud. of Subjected to an object of the present invention.

本発明は、装軌車両の無限軌道によって土壌を攪拌せずに、除染作業を行う方法であって、支持杭を打設する支持杭打設工程と、敷板を敷設する敷板敷設工程と、掘削工程と、敷板の撤去工程と、敷板撤去後の掘削工程と、杭頭切断工程と、から構成され、前記敷板敷設工程は、敷設された前記敷板の上を前記装軌車両が次の敷板を搬送して連設施工するという一連の工程と前記支持杭打設工程を繰り返すことで前記装軌車両の搬送路を施工するものであり、前記掘削工程は、前記敷板を撤去しながら掘削するものであり、前記杭頭切断工程は、掘削し終わった場所の支持杭は掘削面に合わせて杭頭を切断処理する構成を採用するものである。   The present invention is a method of performing decontamination work without agitating the soil by an endless track of a tracked vehicle, a support pile placing step for placing a support pile, and a floor plate laying step for laying a floor plate, It comprises a drilling process, a floor board removal process, a drilling process after the floor board removal, and a pile head cutting process. The floor board laying process is the next floor board on the laid floor board. Is carried out by repeating the series of steps of carrying and continuously installing the support pile and the step of placing the support pile, and the excavation step excavates while removing the floorboard. In the pile head cutting step, the support pile at the place where excavation is completed adopts a configuration in which the pile head is cut according to the excavation surface.

また、本発明は、前記支持杭打設工程及び前記敷板敷設工程の後であって、前記掘削工程の前に、掘削パスの確認及び施工前掘削深さの確認工程と、粗除根工程を有し、前記敷板の撤去工程と、前記敷板撤去後の掘削工程の後であって前記杭頭切断工程の前に、施工後の掘削深さの確認工程と、掘削後の底泥の簡易セシウム濃度測定工程を有した構成を採用することもできる。   Further, the present invention includes a step of confirming the excavation path and a pre-construction excavation depth and a rough root removal step after the support pile placing step and the laying plate laying step and before the excavation step. And after the excavation step after the floor plate removal and before the pile head cutting step, the excavation depth confirmation step after construction, and the simple cesium concentration of the bottom mud after excavation A configuration having a measurement process can also be adopted.

また、本発明は、前記撤去工程において、前記搬送路を敷設方向と略平行に置換え敷設して移設する構成手段を採用してもよい。   Further, the present invention may employ a configuration means that, in the removing step, the transport path is replaced and laid and moved substantially parallel to the laying direction.

また、本発明は、前記支持杭に松材を用い、前記杭頭切断工程において、掘削後の地面より露出した前記杭頭を切断し、その余の支持杭を土壌内に残存させたままにして、調整池の底抜きを防止する構成を採用することもできる。   Further, the present invention uses pine wood for the support pile, and in the pile head cutting step, cuts the pile head exposed from the ground after excavation, and leaves the remaining support pile in the soil. Thus, it is possible to adopt a configuration that prevents bottoming out of the adjustment pond.

また、本発明は、前記敷板が金属製、または樹脂製である構成を採用してもよい。   Further, the present invention may adopt a configuration in which the floor plate is made of metal or resin.

また、本発明は、前記掘削工程及び前記敷板撤去後の掘削工程において行う掘削を、バックホー又はバキュームで行う構成手段を採用してもよい。   Moreover, you may employ | adopt the structural means which performs the excavation performed in the excavation process after the said excavation process and the said floor board removal by a backhoe or a vacuum.

また、本発明は、溜め池において、水が引いた部分は請求項１から請求項６の何れかに記載の汚染土壌層の掘削工法を用いることを基本構成とし、水が溜まっている部分は底泥Ｒを水ごと吸引する撹拌剥離式吸引工法を用いることで、溜め池全体を総合的に除染する工法であって、前記攪拌剥離式吸引工法が、前面と底面が開口し上面と奥面と両側面とが閉塞し、前面には、スライド可能に設置され、前記前面の開口の幅を変化させるスライド板を備えた筐体部を有するとともに、前方に位置し底泥Ｒを撹拌する撹拌ローラと、前記撹拌ローラの後方に位置し複数の円板刃が周面に設けられた第１の切断ローラと、前記第１の切断ローラの上方に位置し複数の円板刃が周面に設けられた第２の切断ローラと、前記第１の切断ローラと第２の切断ローラの後方に吸引口が位置し底泥Ｒを水ごと吸引するポンプ部と、前記ポンプ部と接続し吸引した底泥Ｒを前記台船側に送る送水ホースと、を有し、前記第１の切断ローラは前面視で下から上に回転するとともに、前記第２の切断ローラは前面視で上から下に回転し、前記第１の切断ローラと第２の切断ローラの間隙に巻き込んだ異物を前記第１の切断ローラと第２の切断ローラの円板刃が切断する撹拌剥離式吸引装置と、水面に位置するとともに前記撹拌剥離式吸引装置を水底に吊り下げる台船と、陸側に設けられた底泥処理装置と、前記撹拌剥離式吸引装置が吸引した底泥を前記底泥処理装置に送るホース部材と、前記撹拌剥離式吸引装置を移動させるための移動手段とを有し、該移動手段がワイヤによって前記撹拌剥離式吸引装置を牽引して移動させる牽引手段もしくは前記撹拌剥離式吸引装置に一端が固定されたシャフトを押し引きして移動させるシャフト式移動手段である撹拌剥離式吸引システムを用い、前記台船を水面の所定の位置に配置するステップと、前記台船から前記撹拌剥離式吸引装置を水底に下ろすステップと、前記撹拌剥離式吸引装置を動作させ、前記撹拌ローラが底泥を撹拌して掻き上げ、前記第１の切断ローラと前記第２の切断ローラとが異物を切断し、前記ポンプ部が底泥と切断された異物と水とを吸引するステップと、吸引した底泥と切断された異物と水とをホース部材を介して前記底泥処理装置に圧送するステップと、前記底泥処理装置が底泥を異物と水から分離して回収するステップと、前記撹拌剥離式吸引装置を水底で移動させるステップと、から成る構成手段を採用してもよい。   Further, according to the present invention, in the reservoir, the portion where water is drawn is based on the use of the contaminated soil layer excavation method according to any one of claims 1 to 6, and the portion where water is accumulated is By using a stirring and peeling type suction method that sucks the bottom mud R together with water, it is a method of comprehensively decontaminating the entire reservoir. The front surface and both side surfaces are closed, and the front surface has a housing portion that is slidably installed and has a slide plate that changes the width of the opening on the front surface. A stirring roller; a first cutting roller positioned behind the stirring roller and provided with a plurality of disk blades on the circumferential surface; and a plurality of disk blades positioned above the first cutting roller and the circumferential surface A second cutting roller provided on the first cutting roller, and the first cutting roller and the second cutting roller. A suction port located behind the roller and sucking the bottom mud R together with water; and a water supply hose connected to the pump unit and sending the sucked bottom mud R to the trolley side, The cutting roller rotates from bottom to top in front view, and the second cutting roller rotates from top to bottom in front view to remove foreign matter caught in the gap between the first cutting roller and the second cutting roller. A stirring separation type suction device that is cut by the disk blades of the first cutting roller and the second cutting roller, a base ship that is located on the water surface and suspends the stirring separation type suction device on the bottom of the water, and is provided on the land side. A bottom mud treatment device, a hose member for sending the bottom mud sucked by the stirring and peeling type suction device to the bottom mud processing device, and a moving means for moving the stirring and peeling type suction device, The stirring / separating type suction device using a wire as the moving means Using the agitation / removal suction system, which is a pulling / removing suction system that is a shaft-type moving unit that moves by pulling or moving a shaft fixed at one end to the agitation / removal suction device. Disposing the stirring and peeling type suction device to the bottom of the water from the carriage, operating the stirring and peeling type suction device, the stirring roller stirring and scraping the bottom mud, The cutting roller and the second cutting roller cut foreign matter, and the pump portion sucks the bottom mud, the cut foreign matter and water, and the sucked bottom mud, the cut foreign matter and water. A step of pumping the bottom mud treatment device through a hose member; a step of separating the bottom mud from the foreign matter and water by the bottom mud treatment device; and a step of moving the stirring and peeling type suction device at the bottom of the water. You may employ | adopt the structure means which consists of a group.

また、本発明は、前記汚染土壌層の掘削工法により掘削された底泥、又は前記撹拌剥離式吸引工法により吸引された底泥を、自然脱水若しくは加圧脱水する脱水工程、セシウム濃度測定・処理工程、並びに肥料成分調整・処理工程を経て肥料を得る前記溜め池総合除染工法を利用した肥料製造方法とすることもできる。
The present invention also sediment was drilled by the drilling method of the contaminated soil layers, or sucked sediments by the 撹拌peelable suction method, natural dehydration or under圧脱water to the dehydration step, the cesium concentration measurement, can process steps, and also to the pond comprehensive decontamination method fertilizer Manufacturing method utilizing to obtain the fertilizer through the fertilizer component adjustment and processing steps.

本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法によれば、搬送路となる敷設された敷板上を重機が移動するため、装軌車両の無限軌道によって汚染された土壌を攪拌せずに、掘削による除染作業を効果的に行うことが可能となる優れた効果を発揮する。   According to the excavation method of the contaminated soil layer used in the reservoir pond comprehensive decontamination method according to the present invention, the heavy equipment moves on the laying slab that becomes the conveyance path, so that the soil contaminated by the endless track of the tracked vehicle It exhibits an excellent effect that enables decontamination work by excavation to be performed effectively without stirring.

本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法によれば、敷板の置換え移設により使用する全敷板枚数を減らすことができるという優れた効果を発揮する。   According to the excavation method of the contaminated soil layer used in the reservoir pond comprehensive decontamination method according to the present invention, it is possible to reduce the total number of floorboards to be used by replacing the floorboards.

また、本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法において、支持杭に松材を使用する構成を採用する構成では、支持杭を残したままとすることで、池の底を抜くことがないという効果を発揮する。   Also, in the excavation method of the contaminated soil layer used in the reservoir pond comprehensive decontamination method according to the present invention, in the configuration employing the pine material for the support pile, the pond is left by leaving the support pile. The effect of not pulling out the bottom of the.

また、本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法における前記撤去工程において、前記搬送路を敷設方向と略平行に移設して置換え敷設する構成手段を採用した場合には、敷板の敷設作業を効率よく行うことができるという優れた効果を発揮する。   Further, in the removal step in the excavation method of the contaminated soil layer used in the reservoir pond comprehensive decontamination method according to the present invention, when adopting a configuration means for transferring and replacing the conveying path substantially parallel to the laying direction. Exhibits an excellent effect that the laying work of the floorboard can be performed efficiently.

また、本発明に係る溜め池総合除染工法の内、撹拌剥離式吸引工法で利用する撹拌剥離式吸引装置は、前面視で下から上に回転する第１の切断ローラと 、この第１の切断ローラの上方に位置し前面視で上から下の方向に回転する第２の切断ロ ーラとを有している。そして、これら第１、第２の切断ローラが水生植物等の異物をポンプ部が吸引可能なサイズに切断する。このためポンプ部の吸引口に異物が詰まることがなく、ポンプ部の吸引能力を良好な状態で維持することができる。これにより、底泥の吸引作業を長時間連続して行うことができる。また、本発明に係る撹拌剥離式吸引装置は、上面、奥面、両側面が閉塞し、前面開口部はスライド板によって適度な開口幅に調整されるから、撹拌剥離式吸引装置外の底泥を舞い上げることがなく、底泥の堆積状態を維持し効果的に回収を行う事ができる。また、水の 透明度を維持することができる。また、本発明に係る撹拌剥離式吸引装置は、スライド板により前面開口部の開口幅を増減 することができるため、送水する底泥の濃度を調整することができる。また、本発明に係る撹拌剥離式吸引システム及び撹拌剥離式吸引工法は、上記の撹拌剥離式吸引装置を有するため、底泥の吸引作業を効率良く長時間連続して行うことができるという効果を発揮するものである。   In addition, among the reservoir pond comprehensive decontamination method according to the present invention, a stirring separation type suction device used in the stirring separation type suction method includes a first cutting roller that rotates from bottom to top in front view, A second cutting roller located above the cutting roller and rotating from top to bottom in front view. And these 1st, 2nd cutting rollers cut | disconnect foreign substances, such as an aquatic plant, in the size which a pump part can attract | suck. For this reason, the suction port of the pump unit is not clogged with foreign matter, and the suction capability of the pump unit can be maintained in a good state. Thereby, the bottom mud suction operation can be performed continuously for a long time. Further, the stirring / peeling type suction device according to the present invention has a top mud, a back surface, and both side surfaces closed, and the front opening is adjusted to an appropriate opening width by the slide plate. It is possible to maintain the bottom mud accumulation state and effectively collect it. In addition, the transparency of water can be maintained. Moreover, since the stirring and peeling type suction device according to the present invention can increase or decrease the opening width of the front opening by the slide plate, it can adjust the concentration of the bottom mud to be fed. Moreover, since the stirring and peeling type suction system and the stirring and peeling type suction method according to the present invention have the stirring and peeling type suction device described above, the bottom mud can be sucked efficiently and continuously for a long time. It is something that demonstrates.

本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法の基本的な流れを示すフローチャート図である。It is a flowchart figure which shows the basic flow of the excavation construction method of the contaminated soil layer utilized with the reservoir pond comprehensive decontamination construction method concerning this invention. 本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法における支持杭打設工程及び敷板敷設工程を説明する工程説明図である。It is process explanatory drawing explaining the support pile placing process in the excavation construction method of the contaminated soil layer utilized with the reservoir pond comprehensive decontamination construction method concerning this invention, and a laying board laying process. 本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法における掘削工程及び撤去工程を説明する工程説明図である。It is process explanatory drawing explaining the excavation process and removal process in the excavation method of the contaminated soil layer utilized with the reservoir pond comprehensive decontamination method which concerns on this invention. 本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法における敷板撤去後の掘削工程及び杭頭切断工程を説明する工程説明図である。It is process explanatory drawing explaining the excavation process and pile head cutting process after the baseplate removal in the excavation method of the contaminated soil layer utilized with the reservoir pond comprehensive decontamination method which concerns on this invention. 本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法における敷板の敷設方向及び敷板の配置を説明する施工手順説明図である。It is construction procedure explanatory drawing explaining the laying direction and arrangement | positioning of a flooring board in the excavation construction method of the contaminated soil layer utilized with the reservoir pond comprehensive decontamination construction method concerning this invention. 本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法における敷板及び支持杭の配置関係を説明する配置構成説明図である。It is an arrangement configuration explanatory view explaining the arrangement relation of the floorboard and the support pile in the excavation method of the contaminated soil layer used in the reservoir pond comprehensive decontamination method according to the present invention. 本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法領域と撹拌剥離式吸引工法領域を示す領域説明図である。It is area | region explanatory drawing which shows the excavation construction area | region of the contaminated soil layer utilized by the reservoir pond comprehensive decontamination construction method which concerns on this invention, and the stirring peeling type suction construction area | region. 本発明に係る溜め池総合除染工法における汚染土壌層の掘削工法、撹拌剥離式吸引工法、及び堆肥・肥料の製造方法の全体の流れを示すフローチャート図である。It is a flowchart figure which shows the whole flow of the excavation method of the contaminated soil layer, the stirring peeling type suction method, and the manufacturing method of compost and fertilizer in the reservoir pond comprehensive decontamination method concerning this invention. 本発明に係る溜め池総合除染工法で利用可能な撹拌剥離式吸引システムの全体を示す図である。It is a figure which shows the whole stirring peeling type | formula suction system which can be utilized with the reservoir pond comprehensive decontamination method concerning this invention. 他の移動手段を備えた本発明に係る溜め池総合除染工法で利用可能な撹拌剥離式吸引システムを示す図である。It is a figure which shows the stirring peeling type suction system which can be utilized with the reservoir pond comprehensive decontamination method which concerns on this invention provided with the other moving means. 本発明に係る溜め池総合除染工法で利用可能な撹拌剥離式吸引装置を示す図である。It is a figure which shows the stirring peeling type suction device which can be utilized with the reservoir pond comprehensive decontamination method concerning this invention. 本発明に係る溜め池総合除染工法で利用可能な撹拌剥離式吸引装置の第１、第２の切断ローラを示す図である。It is a figure which shows the 1st, 2nd cutting roller of the stirring peeling type suction device which can be utilized with the reservoir pond comprehensive decontamination method concerning this invention. 本発明に係る溜め池総合除染工法で利用可能な撹拌剥離式吸引装置の撹拌ローラの例を示す図である。It is a figure which shows the example of the stirring roller of the stirring peeling type suction device which can be utilized with the reservoir pond comprehensive decontamination method concerning this invention.

本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法１は、調整池等の局所的汚染箇所における汚染された土壌の掘削作業において、装軌車両の搬送路を敷板で敷設し、施工された搬送路上でのみ装軌車両を移動させる構成を採用したことを最大の特徴とするものである。以下、図面に基づいて説明する。   In the excavation method 1 of the contaminated soil layer used in the reservoir pond comprehensive decontamination method according to the present invention, in the excavation work of the contaminated soil in a locally contaminated place such as a regulating pond, the transportation path of the tracked vehicle is laid with a floor plate. In addition, the greatest feature is that the configuration in which the tracked vehicle is moved only on the constructed conveyance path is adopted. Hereinafter, description will be given based on the drawings.

図１は、本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法１の作業工程を示すフローチャート図である。図１（ａ）は、本発明に係る汚染土壌層の掘削工法１の基本フローを示し、図１（ｂ）は、実施の除染作業に際して必要となる可能性のある工程を付加した作業工程を示すフローを示し、である。先ず、本発明に係る汚染土壌層の掘削工法１で使用する道具、装置、又は設備等について説明する。   FIG. 1 is a flowchart showing a work process of a contaminated soil layer excavation method 1 used in a reservoir pond comprehensive decontamination method according to the present invention. Fig.1 (a) shows the basic flow of the excavation method 1 of the contaminated soil layer which concerns on this invention, FIG.1 (b) is the work process which added the process which may be needed in the implementation decontamination work. The flow which shows is. First, the tool, apparatus, or facility used in the excavation method 1 for a contaminated soil layer according to the present invention will be described.

装軌車両１０は、無限軌道１１を有する重機等をいい、本発明に係る汚染土壌層の掘削工法１に使用されるのは、掘削にはバックホー、水切りフレコンＱ等に詰めた土壌Ｔの移動にはキャリアダンプ、該キャリアダンプの荷役ステージ４３から水処理機械ヤード４４まではクローラクレーン等を用いることとなる。特に掘削に使うものは、油圧ショベルと総称される建設機械の内、ショベル（バケット）を、オペレーター側に取り付けたバックホーであって、泥濘に強い無限軌道１１を備え、上部の車体全体を旋回させる機能を有するものであることが必要であり、ショベルが前向きのものは適さない。理由は、敷板上でのみ装軌車両１０の移動を可能とすることで無限軌道１１による土壌Ｔの攪拌を防止するためである。   The tracked vehicle 10 is a heavy machine or the like having an endless track 11 and is used in the excavation method 1 of the contaminated soil layer according to the present invention. For excavation, movement of the soil T packed in a backhoe, draining flexible container Q, etc. In this case, a carrier dump and a crawler crane or the like are used from the carrier dump loading stage 43 to the water treatment machine yard 44. What is used for excavation in particular is a backhoe in which excavators (buckets) are attached to the operator side among construction machines collectively called hydraulic excavators, which are equipped with an endless track 11 that is resistant to mud and swivels the entire upper body. It is necessary to have a function, and a forward shovel is not suitable. The reason is to prevent the soil T from being agitated by the endless track 11 by allowing the tracked vehicle 10 to move only on the floorboard.

無限軌道１１は、起動輪、転輪、遊動輪を囲むように一体に接続された履板、シューの環であり、起動輪で該環を動かすことによって不整地での装軌車両１０の移動を可能にするものである。   The endless track 11 is a ring of shoes and shoes that are integrally connected so as to surround the starting wheel, the rolling wheel, and the idler wheel, and the movement of the tracked vehicle 10 on rough terrain by moving the ring with the starting wheel. Is possible.

支持杭２０は、敷板３０を敷設する予定の場所に打設する杭であり、素材や寸法について特に限定されるものではないく、木杭以外の綱杭やコンクリート杭、或いは樹脂杭でも良いが、図5、図6に示した実施例に基づき、具体的な例示をすると、直径２００ミリ×２．０メートルの松材を用いて１．５×３．０メートルの敷板３０の一枚当たりに８本程度用いることが望ましい。松は他の針葉樹と比較して密度が大きく硬いという施工上の利点があるとともに、水中でも耐腐食性が高いからである。特に本発明では、杭頭２１を切り取った残りの支持杭２０は地中に残すため、有機材を使用することが環境保全に資することになる。   The support pile 20 is a pile placed in a place where the floor plate 30 is planned to be laid, and is not particularly limited in terms of material and dimensions, but may be a rope pile, a concrete pile, or a resin pile other than a wooden pile. Based on the embodiment shown in FIG. 5 and FIG. 6, a specific example is as follows. It is desirable to use about eight. This is because pine has a construction advantage that it is denser and harder than other conifers and has high corrosion resistance even in water. In particular, in the present invention, since the remaining support pile 20 obtained by cutting the pile head 21 is left in the ground, the use of an organic material contributes to environmental conservation.

杭頭２１は、敷板３０を除去しながら掘削し、掘削泥を水切りフレコン９に入れて搬出する際に、掘削し終わったパスの支持杭２０の池底面に合わせて切断処理する部分である。係る掘削後の杭頭を切断することによって池底の凹凸をなくす。   The pile head 21 is a portion that is excavated while removing the floorboard 30 and is cut according to the pond bottom of the support pile 20 of the path that has been excavated when the excavated mud is put into the draining flexible container 9 and carried out. The unevenness of the pond bottom is eliminated by cutting the pile head after excavation.

敷板３０は、鉄板、若しくは樹脂製の硬質な板状部材であり、例えば鉄製の１.５メートル×３メートル等のサイズで、縦横比が２：１であることが望ましい。その理由は、図5及び図６に示すように、横向きに２枚の敷板を敷いた後、その上に縦に２枚敷設して交互に繰り返すなどすることで、面方向の撓みに対する強度を高めることが可能となるからである。   The floor plate 30 is an iron plate or a hard plate-shaped member made of resin, and is preferably, for example, a size of 1.5 meters × 3 meters made of iron and an aspect ratio of 2: 1. The reason for this is that, as shown in FIG. 5 and FIG. 6, after laying two laying boards in the horizontal direction, laying two sheets vertically on top and repeating them alternately, the strength against bending in the surface direction is increased. It is because it becomes possible to raise.

搬送路４０は、敷設開始位置４１から、敷設方向５０に向かって装軌車両１０の移動するルートに敷板を敷いて作りだす道である。また、敷設方向５０は、基本的には撤去方向６０と逆向きとなり、置き換えによる敷設方向５０も略平行に移動しながら行われ、広範囲な掘削を行えるように施工する。   The conveyance path 40 is a road that is created by laying a floor plate on a route along which the tracked vehicle 10 moves from the laying start position 41 toward the laying direction 50. In addition, the laying direction 50 is basically opposite to the removal direction 60, and the laying direction 50 by replacement is performed while moving substantially in parallel, so that a wide excavation can be performed.

土壌Ｔは、除染作業による掘削の対象物であり、雨水排水が集まる雨水調整池、溜め池等において、そこに放射性物質を含む土壌・落葉等の集積により、高い濃度の放射性物質が濃集（蓄積）された可能性の高い土、又は富栄養化した腐葉土をいう。   Soil T is an object to be excavated by decontamination work. In rainwater adjustment ponds and reservoirs where rainwater drainage collects, soil T and defoliation, etc. that contain radioactive substances, accumulate high concentrations of radioactive substances. Soil that is highly likely to be (accumulated) or eutrophic humus.

調整池、溜め池Ｐは、集中豪雨などの局地的な出水により、河川に流れ込む雨水を一時的に溜め、下流の河川や下水道雨水管への負担を軽減し、又農業水利施設であって、一般の人たちの立ち入りが出来ないようにフェンス等で囲われるなどの管理がされている溜め池である。   Regulating ponds and reservoir ponds P are rainwater that temporarily flows into rivers due to localized flooding such as torrential rains, reduce the burden on downstream rivers and sewer storm drains, and are also agricultural irrigation facilities. It is a reservoir that is managed to be enclosed by fences and the like so that ordinary people cannot enter.

次に、図１（ａ）に基づいて、本発明の基本構成を成す各工程について説明する。
本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法１は、装軌車両１０の無限軌道１１によって土壌Ｔを攪拌せずに、除染作業を行う方法であって、支持杭打設工程Ａと、敷板敷設工程Ｂと、掘削工程Ｅと、敷板３０の撤去工程Ｆと、敷板撤去後の掘削工程Ｇと、杭頭切断工程Ｊと、から構成される、汚染土壌層を掘削する工法である。Next, each process which comprises the basic composition of this invention is demonstrated based on Fig.1 (a).
The excavation method 1 of the contaminated soil layer used in the reservoir pond comprehensive decontamination method according to the present invention is a method of performing decontamination work without stirring the soil T by the endless track 11 of the tracked vehicle 10, Contaminated soil layer composed of a pile placing process A, a floorboard laying process B, an excavation process E, a floorboard 30 removal process F, a drilling process G after the floorboard removal, and a pile head cutting process J It is a construction method to excavate.

図２は、本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法１における支持杭打設工程及び敷板敷設工程を説明する工程説明図であり、図２（ａ）が支持杭打設工程Ａを示し、図２（ｂ）が敷板敷設工程Ｂを示している。   FIG. 2 is a process explanatory view for explaining a support pile placing process and a laying board laying process in the excavation method 1 of the contaminated soil layer used in the reservoir pond comprehensive decontamination method according to the present invention, and FIG. Pile placing process A is shown, and FIG.

支持杭打設工程Ａは、支持杭２０を土壌Ｔへ打ち込む工程であるが、敷板３０を敷設する予定の場所に支持杭２０を打設するポイントをメジャー等で図り、バックホー等の重機を用いて打設する工程である。なお、係る支持杭２０の打設以前に、土壌Ｔに草木等の植物が育成している場合は、これを刈り取る工程、及び土嚢等に詰めて搬出し、有機物用扱いとして一時保管場所に保管する工程が存在することはいうまでもない。   The support pile placing process A is a process of placing the support pile 20 into the soil T. The point where the support pile 20 is placed in a place where the floor plate 30 is to be laid is measured with a measure or the like, and a heavy machine such as a backhoe is used. This is the process of placing the If plants such as vegetation are grown on the soil T prior to the placement of the support pile 20, the process of cutting them, packing them in sandbags, etc., and storing them in a temporary storage place for handling organic matter Needless to say, there is a process to perform.

敷板敷設工程Ｂは、鉄板等の敷板３０を池の地表面に敷設する工程であり、具体的には打設した支持杭２０にバランスよく配置することが必要である。具体的には、例えば図６（ａ）に示すように、敷板３０に合わせて打ち込まれた支持杭２０に対して横向きに２枚敷き、その上に直行するように縦向きに２枚敷くことによって、曲げや撓みに対する強度を高めた重機等の搬送路を施工する工程である。なお、敷設方向５０が変化する部分や、荷役ステージ４３等では、３枚以上の敷板３０を重畳的に配置することで、上敷板と下敷板との繋ぎ部を補強することが望ましい。   The laying plate laying step B is a step of laying a laying plate 30 such as an iron plate on the ground surface of the pond. Specifically, it is necessary to arrange the laying support pile 20 in a balanced manner. Specifically, for example, as shown in FIG. 6 (a), two sheets are laid laterally with respect to the support pile 20 driven in accordance with the laying board 30, and two sheets are laid vertically so as to go straight on the piles. This is a process of constructing a transport path for heavy machinery or the like with increased strength against bending and bending. In addition, in the part where the laying direction 50 changes, the cargo handling stage 43, and the like, it is desirable to reinforce the connecting portion between the upper and lower laying boards by arranging three or more laying boards 30 in a superimposed manner.

図３は、本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法１における掘削工程E及び敷板３０の撤去工程Fを説明する工程説明図であり、図３（ａ）が掘削工程Ｅを示し、図３（ｂ）が敷板の撤去工程Ｆを示している。   FIG. 3 is a process explanatory view for explaining the excavation process E and the removal process F of the floorboard 30 in the excavation method 1 of the contaminated soil layer used in the reservoir pond comprehensive decontamination method according to the present invention, and FIG. Excavation process E is shown, and FIG. 3B shows a floor board removal process F.

掘削工程Ｅは、バックホー等でパス内の掘削を行い、掘削した土は水切りフレコンＱに詰め、キャリアダンプに積んで荷役ステージ４３まで運び、クレーンで水処理機械ヤード４４まで吊り上げる工程である。その後は一般的な脱水工程へ進んで処理される。なお、土壌Tの水分が多い場合はバキュームにより、吸入して汚染土壌を除去することも有効である。   The excavation process E is a process in which excavation in the path is performed by a backhoe or the like, the excavated soil is packed in a draining flexible container Q, loaded on a carrier dump, transported to the loading stage 43, and lifted to the water treatment machine yard 44 by a crane. Thereafter, the process proceeds to a general dehydration process. If the soil T has a high water content, it is also effective to remove the contaminated soil by inhalation with a vacuum.

敷板の撤去工程Ｆは、パス内の敷板部分以外の掘削が終わったら、敷板を撤去すると同時に、これから施工する施工範囲の敷板３０の敷設を行う工程である。   The floor board removing step F is a process of removing the floor board and laying the floor board 30 in the construction range to be constructed at the same time after excavation of the floor board portion other than the floor board portion in the path is completed.

図４は、本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法１における敷板撤去後の掘削工程Ｇ及び杭頭切断工程Ｊを説明する工程説明図であり、図４（ａ）が敷板撤去後の掘削工程Ｇを示し、図４（ｂ）が杭頭切断工程Ｊを示している。   FIG. 4 is a process explanatory view for explaining the excavation process G and the pile head cutting process J after the removal of the bottom plate in the excavation method 1 of the contaminated soil layer used in the reservoir pond comprehensive decontamination method according to the present invention. a) shows the excavation process G after the floor board is removed, and FIG. 4 (b) shows the pile head cutting process J.

敷板撤去後の掘削工程Ｇは、敷板撤去後のエリア内を掘削する。掘削した土は水切りフレコンQに詰め、キャリアダンプに積んで荷役ステージ４３まで運び、クレーンで水処理機械ヤード４４まで吊り上げる工程である。なお、その後は一般的な脱水工程へ進んで処理される。   The excavation process G after removing the floorboard excavates the area after the floorboard removal. The excavated soil is packed in a draining flexible container Q, loaded on a carrier dump, carried to the cargo handling stage 43, and lifted to the water treatment machine yard 44 by a crane. Thereafter, the process proceeds to a general dehydration process.

杭頭切断工程Ｊは、パス内の施工効果が確認できたら掘削後の池底より露出した杭頭２１をチェーンソー等で切断する工程である。   The pile head cutting process J is a process of cutting the pile head 21 exposed from the bottom of the pond after excavation with a chain saw or the like after confirming the construction effect in the path.

次に、図１（ｂ）に基づいて、本発明の基本構成となる工程の他に、土壌Ｔの掘削による除染作業において一般的に必要となる各工程について説明する。   Next, based on FIG.1 (b), each process generally required in the decontamination operation | work by excavation of the soil T is demonstrated besides the process used as the basic composition of this invention.

掘削パスの確認及び施工前掘削深さの確認工程Ｃは、敷板撤去後の掘削工程Ｇの後に行う工程であって、トータルステーションを用いて座標管理により掘削パスの四隅に目印の杭を打設する工程と、レーザレベルを設置し、検出側ロープを装着した伸縮式竿を施工前の池底等に下し、レーザーが示す検出側ロープの数値を確認する工程である。   The excavation path confirmation and excavation depth confirmation process C before construction is a process performed after the excavation process G after the removal of the floorboard, and piles of landmarks are placed at the four corners of the excavation path by coordinate management using the total station. It is a step of installing a process and a laser level, lowering a telescopic cage equipped with a detection side rope to the bottom of the pond before construction, etc., and confirming the numerical value of the detection side rope indicated by the laser.

粗除根工程Ｄは、掘削工程Ｅの前に行う工程であって、バックホーに除根用の特殊バケットを装着してエリア内を粗除根する工程である。なお、粗除根された根は耐候性土嚢に詰めてキャリアダンプに積み、荷役ステージ４３まで運び、クレーンで堤体Ｓ上まで吊り上げ、有機物用扱いとして一時保管場所に保管する。   The rough root removal step D is a step performed before the excavation step E, and is a step of rough root removal in the area by attaching a special bucket for root removal to the backhoe. The coarsely rooted roots are packed in a weather-resistant sandbag, loaded on a carrier dump, transported to the cargo handling stage 43, lifted onto the dam body S by a crane, and stored in a temporary storage place for handling organic matter.

施工後の掘削深さの確認工程Ｈは、敷板撤去後の掘削工程Ｇの後に行う工程であって、レーザーレベルを設置し、検側ロープを装着した伸縮式竿を施工後の池底に下ろし、レーザーが示す検測ロープの数値を確認する工程である。   The excavation depth confirmation process H after construction is a process that is performed after the excavation process G after removing the floorboard. The laser level is set and the telescopic dredge equipped with the inspection rope is lowered to the bottom of the pond after construction. This is a step of confirming the numerical value of the inspection rope indicated by the laser.

掘削後の底泥の簡易セシウム濃度測定工程Ｉは、施工後の掘削深さの確認工程Ｈの後に行う工程であって、長い柄のスコップ等を用いて、パスの中心点付近の土を採泥し、容器に詰め、土の詰まった容器はコリメーターに入れ、既定の方法で簡易セシウム濃度測定をする工程である。 Simplified cesium concentration measurement process I of the bottom mud after excavation is a process performed after the excavation depth confirmation process H after construction, and the soil near the center point of the path is collected using a long handle scoop or the like. and mud, packed in containers, packed containers soil placed in co Rimeta is a process for the simple cesium concentration measurements in the default way.

図５は、本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法１における敷板３０の敷設方向及び敷板３０の配置を説明する施工手順説明図である。なお、係る図１に示した調整池、溜池Pは、係る配置や手順を説明するための一例であり、係る実施例に限定されるものではない。配置や施工手順は、本発明の技術的思想として同一性を失わない範囲内において変更することが可能である。   FIG. 5 is a construction procedure explanatory diagram illustrating the laying direction of the floorboard 30 and the layout of the floorboard 30 in the excavation method 1 of the contaminated soil layer used in the reservoir pond comprehensive decontamination method according to the present invention. In addition, the adjustment pond and the reservoir P shown in FIG. 1 are examples for explaining the arrangement and procedure, and are not limited to the examples. The arrangement and the construction procedure can be changed within the range where the sameness is not lost as the technical idea of the present invention.

図５に示した溜池の除染では、図の左下の荷役ステージ４３を敷設開始位置４１として、上方へ向かう敷設方向５０から右へ向かう敷設方向５０へと敷板３０を敷設し（一次敷設敷板）、撤去開始位置４２から、掘削パス内の掘削を行い、該掘削後、撤去方向６０へと敷板を撤去し、敷板撤去後の掘削を行い、これを繰り返しながら撤去した敷板を、一次敷設した撤去方向６０と逆方向であって並行する置換え敷設方向７０なるように敷設する。係る並行移設を繰り返し最後の搬送路を撤去方向９０に向かって撤去する。なお、係る実施例では、一次敷設枚数が２１７枚、置換え枚数が４７４枚であり、全使用枚数４７４枚で、支持杭本数は１，８３４本であった   In the decontamination of the pond shown in FIG. 5, the laying board 30 is laid from the laying direction 50 directed upward to the laying direction 50 directed to the right (primary laying board) with the loading stage 43 at the lower left in the figure as the laying start position 41. Then, excavation in the excavation path is performed from the removal start position 42, and after the excavation, the floorboard is removed in the removal direction 60, the excavation after the floorboard removal is performed, and the floorboard that has been removed while repeating this is temporarily removed The replacement laying direction 70 is laid in the direction opposite to the direction 60 and in parallel. The parallel transfer is repeated, and the last conveyance path is removed in the removal direction 90. In this example, the number of primary installations was 217, the number of replacements was 474, the total number of use was 474, and the number of support piles was 1,834.

図６は、本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法１における敷板３０及び支持杭２０の配置関係を説明する配置構成説明図であり、図6（ａ）は敷板３０の配置関係を示し、図6（ｂ）は敷板３０及び支持杭２０の配置関係を示している。   FIG. 6 is an arrangement configuration explanatory view for explaining the arrangement relationship between the floorboard 30 and the support pile 20 in the excavation method 1 of the contaminated soil layer used in the reservoir pond comprehensive decontamination method according to the present invention, and FIG. FIG. 6B shows the positional relationship between the floor plate 30 and the support pile 20.

図６（ａ）に示す通り、例えば、縦横が１５２４ｍｍ（3尺）×３０４８ｍｍ（１０尺）の定尺寸法のように、縦横比が２：１の敷板３０とすることにより、横向きに２枚の敷板３０を敷いた後、その上に縦に２枚敷板３０を敷設して交互に繰り返すなどすることで、面方向の撓みに対する強度を高めつつ搬送路４０を施工することが可能となる。また、図６（ｂ）に示す通り、下側に敷設した敷板一枚につき直径２００ｍｍ、長さ２．０ｍの支持杭を8本打設することが望ましい。なお、係る敷板３０の寸法と敷設３０の枚数や、支持杭２０の寸法と打設数はあくまでも例示であって、これらに限定されるものではなく、地耐力や支持杭強度等に影響されるが、これに具現された発明と同一性を失わない範囲内において変更することが可能である。   As shown in FIG. 6 (a), for example, the floor plate 30 having an aspect ratio of 2: 1, such as a standard size of 1524 mm (3 scales) × 3048 mm (10 scales) in the vertical and horizontal directions, two sheets in the horizontal direction. After laying the laying plate 30, the two laying plates 30 are laid vertically on the laying plate 30 and are alternately repeated, thereby making it possible to construct the conveyance path 40 while increasing the strength against bending in the surface direction. Moreover, as shown in FIG.6 (b), it is desirable to lay eight supporting piles with a diameter of 200 mm and a length of 2.0 m per sheet laid on the lower side. In addition, the dimension of the floor plate 30 and the number of the laying 30 and the dimension and the number of driving piles of the support pile 20 are merely examples, and are not limited to these, and are affected by ground strength, support pile strength, and the like. However, it is possible to make changes within a range not losing the same identity as the invention embodied therein.

図７は、本発明に係る溜め池総合除染工法で利用する汚染土壌層の掘削工法を利用する領域と撹拌剥離式吸引工法を利用する領域を示す領域説明図であり、図７（ａ）は、上面視により、溜め池Ｐの全体を示し図７（ｂ）は、ため池Ｐの縦断面を示している。堤体Ｓによって溜まった水域の底層から表層までの領域を撹拌剥離式吸引工法を利用し、吸水や乾水により表層の高さが低下した領域の軟土Ｎに対しては汚染土壌層の掘削工法を利用する。 なお、汚染土壌層の掘削工法及び攪拌剥離式吸引工法の順序については水量・水域等によって適宜選択すればよく、例えば攪拌剥離式吸引工法により底泥Ｒまで吸引し吸引後の土壌Ｔを汚染土壌層の掘削工法により掘削して除染するのでもよく、他方、汚染土壌層の掘削工法により表層が低下した領域軟土Ｎを掘削し、水の溜まっている溜池Ｐの領域については攪拌剥離式吸引工法により底泥Ｒを水ごと吸引してもよい。   FIG. 7 is a region explanatory view showing a region using the excavation method of the contaminated soil layer used in the reservoir pond comprehensive decontamination method according to the present invention and a region using the stirring and peeling type suction method. FIG. 7B shows the entire reservoir P in a top view, and FIG. 7B shows a longitudinal section of the reservoir P. Excavation of contaminated soil layer for soft soil N in the region where the height of the surface layer is lowered by water absorption or dry water using the agitation peeling type suction method for the region from the bottom layer to the surface layer of the water area accumulated by the dam body S Use the construction method. In addition, the order of the excavation method of the contaminated soil layer and the stirring separation type suction method may be appropriately selected depending on the amount of water, the water area, etc. For example, the soil T after suction to the bottom mud R by the stirring separation type suction method is used as the contaminated soil. It may be decontaminated by excavation by a layer excavation method. On the other hand, the soft soil N whose surface layer is lowered by the excavation method of a contaminated soil layer is excavated, and the region of the basin P in which water is accumulated is stirred and separated. The bottom mud R may be sucked together with water by a suction method.

図８は、本発明に係る溜め池総合除染工法における汚染土壌層の掘削工法及び撹拌剥離式吸引工法の全体の流れを示すフローチャート図である。図８に示す通り本発明は汚染土壌層の掘削工法１を利用することを基本構成とし、水の存在しない部分は係る掘削工法を用いる。他方、水が存在する場合には低層から表層まで攪拌剥離式吸引工法を用いる。即ち支持杭打設工程Ａ、敷板敷設工程Ｂ、掘削工程Ｅ、敷板撤去工程Ｆ、敷板撤去後の掘削工程、杭頭切断工程からなる汚染土壌層の掘削工法１を基本構成とし、これに加えて、台船配置ステップＫ１、攪拌剥離吸引装置降下ステップＫ２、攪拌・吸引ステップＫ３、圧送ステップＫ４、分離・回収ステップＫ５、水底移動ステップＫ６を有するフローとすることもできるものである。   FIG. 8 is a flowchart showing the entire flow of the excavation method for the contaminated soil layer and the stirring separation type suction method in the reservoir pond comprehensive decontamination method according to the present invention. As shown in FIG. 8, the present invention is based on the use of the contaminated soil layer excavation method 1 and uses the excavation method for a portion where water is not present. On the other hand, when water is present, the stirring and peeling type suction method is used from the lower layer to the surface layer. That is, the excavation method 1 of the contaminated soil layer consisting of the supporting pile placing process A, the laying board laying process B, the excavating process E, the laying board removing process F, the excavating process after removing the siding board, and the pile head cutting process is used as a basic configuration. Thus, the flow may include a carriage arrangement step K1, a stirring and peeling suction device lowering step K2, a stirring / suction step K3, a pressure feeding step K4, a separation / recovery step K5, and a water bottom moving step K6.

係るフローは、水の存在する水量や水域によってどちらの工法を用いてもよいことは前記のとおりであるが、いずれの工程、ステップにおいても排出される土壌Ｔには植物水生植物や枯れ枝等の植物堆積物が多く存在し有機肥料としての栄養分を十分に含んでいることもあり、係る土壌の有効利用を図るべく、掘削工程Ｅまたは、分離回収ステップＫ５の後に自然脱水、もしくは加圧脱水する脱水工程Ｘ、セシウム濃度測定・処理工程Ｙ、並びに肥料成分調整・処理工程Ｚを経て肥料を得る肥料製造方法とするフローが追加されている構成も有効である。
As described above, either method may be used for the flow depending on the amount of water present or the water area, but the soil T discharged in any process or step may include plant aquatic plants, dead branches, etc. There are many plant deposits and they may contain enough nutrients as organic fertilizers. Natural dehydration or pressure dehydration is performed after the excavation step E or the separation and recovery step K5 in order to effectively use the soil. configuration flow for a dehydration step X, cesium concentration measurement and processing steps Y, and fertilizer Manufacturing method of obtaining a fertilizer through a fertilizer component adjustment and process Z is added is also effective.

図９（ａ）に示す通り、   As shown in FIG.

つぎに、本発明に係る溜め池総合除染工法で利用する撹拌剥離式吸引装置１８０、撹拌剥離式吸引システム１０２及び撹拌剥離式吸引工法の実施の形態について図９から図１３に基づいて説明する。ここで、図９、図１０は本発明に係る撹拌剥離式吸引システム１０２の全体を示す図である。また、図１１（ａ）は本発明に係る撹拌剥離式吸引装置１８０の内部構造を示す模式断面図であり、図１１（ｂ）は撹拌剥離式吸引装置１８０を前面から見た図である。また、図１２は撹拌剥離式吸引装置１８０の内部の第１の切断ローラ１３０ａ、第２の切断ローラ１３０ｂを前面側から見た略図である。また、図１３は撹拌剥離式吸引装置１８０の撹拌ローラ１４０の例を示す図である。   Next, embodiments of the agitation / removal suction device 180, the agitation / removal suction system 102 and the agitation / removal suction method used in the reservoir pond comprehensive decontamination method according to the present invention will be described with reference to FIGS. . Here, FIG. 9, FIG. 10 is a figure which shows the whole stirring and peeling type suction system 102 which concerns on this invention. FIG. 11A is a schematic cross-sectional view showing the internal structure of the agitation / removal suction device 180 according to the present invention, and FIG. 11B is a view of the agitation / removal suction device 180 as viewed from the front. FIG. 12 is a schematic view of the first cutting roller 130a and the second cutting roller 130b inside the stirring / separating suction device 180 as viewed from the front side. FIG. 13 is a view showing an example of the agitation roller 140 of the agitation / peeling suction device 180.

図９に示す本発明に係る撹拌剥離式吸引システム１０２は、貯水池、池、湖沼、掘等の底泥Ｒを水ごと吸引するものであり、水面に位置する台船１１０と、この台船１１０から水底に吊り下げられる撹拌剥離式吸引装置１８０と、陸側に設けられた底泥処理装置１１４と、撹拌剥離式吸引装置１８０と底泥処理装置１１４とを繋ぐホース部材と、台船１１０や陸地に設置され撹拌剥離式吸引装置１８０を移動させるための移動手段１５０と、を有している。尚、ホース部材は、台船１１０に周知の中継ポンプ１１６を設置して、撹拌剥離式吸引装置１８０と接続した送水ホース１１２と、底泥処理装置１１４と接続した中継ホース１１８とを中継ポンプ１１６を介して接続して構成することが好ましい。この構成によれば、中継ポンプ１１６が撹拌剥離式吸引装置１８０の吸引した底泥Ｒ等の圧送を補助するため、ホース部材の総延長が長い場合でも底泥Ｒ等の底泥処理装置１１４への圧送を滞りなく行うことができる。   A stirring / separation type suction system 102 according to the present invention shown in FIG. 9 sucks bottom mud R such as a reservoir, pond, lake, or digging together with water, and includes a base boat 110 located on the surface of the water, and the base boat 110. Agitation separation type suction device 180 suspended from the bottom of the water, a bottom mud treatment device 114 provided on the land side, a hose member connecting the agitation separation type suction device 180 and the bottom mud treatment device 114, And a moving means 150 for moving the stirring / separating type suction device 180 installed on the land. The hose member has a well-known relay pump 116 installed on the carriage 110, and connects the water supply hose 112 connected to the stirring / separation type suction device 180 and the relay hose 118 connected to the bottom mud treatment device 114 to the relay pump 116. It is preferable to connect and configure via the. According to this configuration, since the relay pump 116 assists the pumping of the bottom mud R and the like sucked by the agitation and separation type suction device 180, even if the total extension of the hose member is long, the bottom mud treatment device 114 such as the bottom mud R and the like Can be pumped without delay.

また、台船１１０は作業者が主に撹拌剥離式吸引装置１８０の操作や移動を行う足場であり、フロート等で水面に浮かせても良いし、水上に陸側から鋼材を架け渡すなどして、水面に固定しても良い。   The carrier 110 is a scaffold where the operator mainly operates and moves the stirring / separation type suction device 180. The carrier 110 may be floated on the surface of the water with a float or the like. It may be fixed to the water surface.

また、底泥処理装置１１４は撹拌剥離式吸引装置１８０が水ごと吸引した底泥Ｒを分離回収するものであり、如何なる装置を用いても良い。尚、一般的な底泥処理装置１１４は、吸引した底泥Ｒと異物等とを分離する周知の分離手段と、底泥Ｒと水とを分離する周知の底泥分離手段と、分離した底泥Ｒを脱水して回収する周知の脱水手段と、を有している。 Further, the bottom mud treatment device 114 separates and collects the bottom mud R sucked together with the water by the stirring / separation type suction device 180, and any device may be used. The general bottom mud treatment apparatus 114 includes a well-known separation means for separating the sucked bottom mud R and foreign matter, a well-known bottom mud separation means for separating the bottom mud R and water, and a separated bottom. A known dehydrating means for dewatering and collecting the mud R.

また、移動手段１５０は撹拌剥離式吸引装置１８０の水底での移動等を行うものであり如何なる装置を用いても構わない。ここで、移動手段１５０の好適な一例として、牽引手段１５０ａ及びシャフト式移動手段１５０ｂの構成に関して説明する。先ず牽引手段１５０ａは、撹拌剥離式吸引装置１８０と接続したワイヤ１５４と、このワイヤ１５４の巻上、巻伸ばしが可能なクレーン１５２とを有している。この構成ではクレーン１５２の倒伏動作とワイヤ１５４の巻上、巻伸ばし動作により、撹拌剥離式吸引装置１８０の吊下げ、吊上げ、水底での前方及び横方向の移動を行うことができる。また、底泥Ｒの回収を行う湖沼を挟むようにして牽引手段１５０ａを２台設け、撹拌剥離式吸引装置１８０を前進、後退可能とするようにしても良い。   The moving means 150 is for moving the stirring / separation type suction device 180 at the bottom of the water, and any device may be used. Here, as a suitable example of the moving means 150, the structure of the traction means 150a and the shaft type moving means 150b will be described. First, the traction means 150 a includes a wire 154 connected to the stirring / separating suction device 180, and a crane 152 capable of winding and unwinding the wire 154. In this configuration, the stirring / separating suction device 180 can be suspended, lifted, moved forward and laterally at the bottom of the water by the falling operation of the crane 152 and the winding and unwinding operations of the wire 154. Further, two traction means 150a may be provided so as to sandwich the lake where the bottom mud R is collected, and the stirring / separation type suction device 180 may be moved forward and backward.

また、シャフト式移動手段１５０ｂは図１０に示すように撹拌剥離式吸引装置１８０の例えば筐体部１２８にシャフト１５６の一端が固定され、このシャフト１５６を台船１１０もしくは陸地から押し引きすることで撹拌剥離式吸引装置１８０を移動させる。尚、シャフト式移動手段１５０ｂでは撹拌剥離式吸引装置１８０の吊下げ、吊上げを周知のウインチ等で行うようにしても良い。さらに、移動手段１５０は牽引手段１５０ａとシャフト式移動手段１５０ｂとを組み合わせて、例えば撹拌剥離式吸引装置１８０の前進は牽引手段１５０ａを用いて行い、撹拌剥離式吸引装置１８０の後退はシャフト式移動手段１５０ｂを用いて行うようにしても良い。そして、特に撹拌剥離式吸引装置１８０の前進、後退が可能な移動手段１５０を用いた構成では、撹拌剥離式吸引装置１８０の横位置を順次ずらすことで底泥Ｒの浚渫を連続して効率良く行う事ができる。   Further, as shown in FIG. 10, the shaft type moving means 150b has one end of a shaft 156 fixed to, for example, the casing 128 of the stirring / separating type suction device 180, and the shaft 156 is pushed or pulled from the carriage 110 or the land. The stirring separation type suction device 180 is moved. In the shaft type moving means 150b, the stirring / separation type suction device 180 may be suspended and lifted by a well-known winch or the like. Further, the moving means 150 combines the pulling means 150a and the shaft type moving means 150b. For example, the agitation / separation type suction device 180 is moved forward using the traction means 150a, and the agitation / peeling type suction device 180 is moved backward by the shaft type movement. You may make it carry out using the means 150b. In particular, in the configuration using the moving means 150 capable of moving forward and backward of the stirring / peeling suction device 180, the horizontal mud of the bottom mud R is continuously and efficiently moved by sequentially shifting the lateral position of the stirring / peeling suction device 180. Can be done.

次に、本発明の特徴的な構成である撹拌剥離式吸引装置１８０に関して説明する。本発明に係る撹拌剥離式吸引装置１８０は、前述の台船１１０から水底に吊り下げて底泥Ｒを水ごと吸引するものであり、筐体部１２８と、この筐体部１２８の前方に位置し底泥Ｒを撹拌する撹拌ローラ１４０と、撹拌ローラ１４０の後方に位置し複数の円板刃１３４ａが周面に設けられた第１の切断ローラ１３０ａと、第１の切断ローラ１３０ａの上方に位置し複数の円板刃１３４ｂが周面に設けられた第２の切断ローラ１３０ｂと、これら第１の切断ローラ１３０ａと第２の切断ローラ１３０ｂの後方に位置し底泥Ｒを水ごと吸引するポンプ部１２０と、このポンプ部１２０と接続し吸引した底泥Ｒを台船１１０側に送る送水ホース１１２と、を有している。また、撹拌剥離式吸引装置１８０は、ポンプ部１２０の前に設けられ、ポンプ部１２０の吸引口に付着した異物を除去する剥離ローラ１６０をさらに有していても良い。   Next, the stirring / separating suction device 180 which is a characteristic configuration of the present invention will be described. The agitation / peeling suction device 180 according to the present invention is a device that suspends the bottom mud R from the carriage 110 to the bottom of the water and sucks the bottom mud R together with water, and is positioned in front of the casing 128 and the casing 128. A stirring roller 140 for stirring the bottom mud R, a first cutting roller 130a located behind the stirring roller 140 and provided with a plurality of disk blades 134a on the circumferential surface, and above the first cutting roller 130a. A second cutting roller 130b that is positioned and has a plurality of disk blades 134b provided on the peripheral surface, and is located behind the first cutting roller 130a and the second cutting roller 130b and sucks the bottom mud R together with water. It has a pump part 120 and a water supply hose 112 that is connected to the pump part 120 and sucks the sucked bottom mud R to the carriage 110 side. The agitation / peeling suction device 180 may further include a peeling roller 160 that is provided in front of the pump unit 120 and removes foreign matter adhering to the suction port of the pump unit 120.

また、撹拌剥離式吸引装置１８０を構成する筐体部１２８は、図１１（ａ）、（ｂ）に示すように、撹拌ローラ１４０の前方に位置する前面と底面とが開口し、上面と奥面と両側面１２８ａとが閉塞し、さらに奥面が斜面となった箱型を呈している。そして、この斜面にポンプ部１２０が吸引口を内側にして固定する。また、筐体部１２８の前面の開口部には、スライド板１２９がスライド可能に設置される。そして、スライド板１２９の位置を下げて前面開口部の開口幅を狭めて固定することで、撹拌剥離式吸引装置１８０が取り込む底泥Ｒの比率を増やし、底泥処理装置１１４に送る底泥Ｒの濃度を上昇させることができる。また、スライド板１２９の位置を上げ前面開口部の開口幅を拡げて固定することで、底泥Ｒの厚みが厚い場合に対応することができる。また、水の取り込み量を増やして底泥処理装置１１４に送る底泥Ｒの濃度を低下させることができる。   Further, as shown in FIGS. 11A and 11B, the casing 128 that constitutes the stirring / separating suction device 180 has a front surface and a bottom surface that are located in front of the stirring roller 140, and an upper surface and a rear surface. It has a box shape in which the surface and both side surfaces 128a are closed and the back surface is an inclined surface. And the pump part 120 is fixed to this slope with the suction port inside. A slide plate 129 is slidably installed in the opening on the front surface of the casing 128. Then, by lowering the position of the slide plate 129 and narrowing and fixing the opening width of the front opening, the ratio of the bottom mud R taken in by the stirring and peeling type suction device 180 is increased and the bottom mud R sent to the bottom mud treatment device 114 is increased. The concentration of can be increased. Moreover, the case where the thickness of the bottom mud R is thick can be accommodated by raising the position of the slide plate 129 and fixing the opening width of the front opening. Moreover, the concentration of the bottom mud R sent to the bottom mud treatment apparatus 114 can be reduced by increasing the amount of water taken up.

尚、筐体部１２８は上面、奥面、両側面１２８ａが閉塞し、前面開口部はスライド板１２９によって適度な開口幅に調整されるから、撹拌剥離式吸引装置１８０内で撹拌された底泥Ｒは筐体部１２８内からほとんど漏れず、底泥Ｒの効果的な回収を行うことができる。また筐体部１２８内の撹拌ローラ１４０、切断ローラ１３０ａ、１３０ｂ等の回転によって生じる水流は筐体部１２８が遮蔽するため、外部の底泥Ｒを舞い上げることがなく、底泥Ｒの堆積状態を維持して効果的な浚渫を行う事ができる。また、底泥Ｒの舞い上げを防止することで水の透明度を維持することができる。特に底泥Ｒが放射性物質を含んでいる場合には、これら放射性物質を再拡散することなく、効率的な除染を行うことができる。   In addition, since the top surface, the back surface, and both side surfaces 128a of the housing portion 128 are closed, the front opening is adjusted to an appropriate opening width by the slide plate 129, so that the bottom mud stirred in the stirring and peeling type suction device 180 is used. R hardly leaks from the inside of the housing portion 128, and the bottom mud R can be effectively recovered. Further, since the casing 128 shields the water flow generated by the rotation of the stirring roller 140, the cutting rollers 130a, 130b, etc. in the casing 128, the bottom mud R does not rise up, and the bottom mud R is accumulated. It is possible to carry out effective dredging while maintaining. Moreover, the transparency of water can be maintained by preventing the raising of the bottom mud R. In particular, when the bottom mud R contains radioactive substances, efficient decontamination can be performed without re-diffusion of these radioactive substances.

また、筐体部１２８の上面には、図１１、図１２に示すように、第１の切断ローラ１３０ａ、第２の切断ローラ１３０ｂを回転させる第１のモータ１７０ａと、撹拌ローラ１４０と剥離ローラ１６０とを回転させる第２のモータ１７０ｂとが固定する。   Further, as shown in FIGS. 11 and 12, a first motor 170a for rotating the first cutting roller 130a and the second cutting roller 130b, a stirring roller 140, and a peeling roller are provided on the upper surface of the casing 128. The second motor 170b that rotates the motor 160 is fixed.

撹拌ローラ１４０は、図１３に示すように円柱状のローラ１４２と、このローラ１４２の周面に設置された撹拌部材１４４と有している。尚、撹拌部材１４４の形状に関しては特に限定はなく、図１３（ａ）に示すようにワイヤブラシとしても良いし、図１３（ｂ）に示すように板状体としても良い。また、図１３（ｃ）に示すように板刃としても良い。さらに、撹拌ローラ１４０を付け替え可能としても良い。この構成によれば、例えば藻などの沈水植物が多い場合にはワイヤブラシの撹拌ローラ１４０を用い、ガマや葦のような抽水植物が多い場合には板刃の撹拌ローラ１４０を用いるなど、水底の環境、特に水草の種類や繁茂状態に応じて適切な撹拌ローラ１４０を選択することができる。   As shown in FIG. 13, the stirring roller 140 includes a cylindrical roller 142 and a stirring member 144 installed on the peripheral surface of the roller 142. The shape of the stirring member 144 is not particularly limited, and may be a wire brush as shown in FIG. 13 (a) or a plate-like body as shown in FIG. 13 (b). Moreover, it is good also as a plate blade as shown in FIG.13 (c). Further, the stirring roller 140 may be replaceable. According to this configuration, for example, when there are many submerged plants such as algae, a wire brush agitation roller 140 is used, and when there are a lot of water extraction plants such as cattails and corals, a plate blade agitation roller 140 is used. An appropriate agitation roller 140 can be selected according to the environment, especially the type of aquatic plants and the state of overgrowth.

そして、撹拌ローラ１４０はベアリング等の周知の軸受を介して筐体部１２８に回転可能に軸着される。尚、撹拌ローラ１４０の設置位置は固定式としても良いし、筐体部１２８の上下方向や斜め方向に位置調整を可能としても良い。また、ローラ１４２の一端には歯車１４６が固定され、この歯車１４６はチェーン等の図示しない動力伝達機構を介して第２のモータ１７０ｂの減速歯車１７２ｂと接続する。そして、第２のモータ１７０ｂが回転動作することで、その回転力は減速歯車１７２ｂ、動力伝達機構、歯車１４６を介して撹拌ローラ１４０に伝達し、これにより撹拌ローラ１４０が回転する。尚、このときの撹拌ローラ１４０の回転方向は図１１の矢印に示す、前面視で上から下に回転する方向が好ましい。   The stirring roller 140 is pivotally attached to the casing 128 via a known bearing such as a bearing. The installation position of the agitation roller 140 may be fixed, or the position of the agitation roller 140 may be adjusted in the vertical direction or the oblique direction. A gear 146 is fixed to one end of the roller 142, and this gear 146 is connected to a reduction gear 172b of the second motor 170b through a power transmission mechanism (not shown) such as a chain. Then, as the second motor 170b rotates, the rotational force is transmitted to the stirring roller 140 via the reduction gear 172b, the power transmission mechanism, and the gear 146, whereby the stirring roller 140 rotates. In addition, the direction of rotation of the stirring roller 140 at this time is preferably the direction indicated by the arrow in FIG.

また、第１の切断ローラ１３０ａ、第２の切断ローラ１３０ｂは、円柱状のローラ１３２ａ、１３２ｂと、このローラ１３２ａ、１３２ｂの周面に略等間隔で設置された複数の円板刃１３４ａ、１３４ｂと、この円板刃１３４ａ、１３４ｂの近傍に設置されたスクレイパ１３８ａ、１３８ｂと、を有している。尚、円板刃１３４ａ、１３４ｂは水生植物等の異物を切断するためのものであり、その設置間隔は概ね５ｃｍ〜１５ｃｍ程度が好ましい。また、スクレイパ１３８ａ、１３８ｂは水生植物等の異物を引っ掛けて引き込んだり、破砕したりする機能を有する。   The first cutting roller 130a and the second cutting roller 130b are cylindrical rollers 132a and 132b and a plurality of disc blades 134a and 134b installed on the peripheral surfaces of the rollers 132a and 132b at substantially equal intervals. And scrapers 138a and 138b installed in the vicinity of the disc blades 134a and 134b. The disk blades 134a and 134b are for cutting foreign substances such as aquatic plants, and the installation interval is preferably about 5 to 15 cm. Further, the scrapers 138a and 138b have a function of catching and pulling in foreign substances such as aquatic plants and crushing them.

そして、第１、第２の切断ローラ１３０ａ、１３０ｂの両端は周知の軸受を介して筐体部１２８に回転可能に軸着される。このとき、第２の切断ローラ１３０ｂは、第１の切断ローラ１３０ａの上方、例えば真上や斜め前方に設置する。また、第１の切断ローラ１３０ａと第２の切断ローラ１３０ｂとの設置間隔は、第１の切断ローラ１３０ａの円板刃１３４ａと第２の切断ローラ１３０ｂの円板刃１３４ｂとが側面視で重なる位置とすることが好ましい。よって、円板刃１３４ａ、１３４ｂ、スクレイパ１３８ａ、１３８ｂの位置は第１の切断ローラ１３０ａと第２の切断ローラ１３０ｂとで軸線方向に若干ずらして構成することが好ましい。また、円板刃１３４ａと円板刃１３４ｂとは近接して配置することが好ましく、図４に示すように、一方の円板刃１３４ａ（１３４ｂ）とスクレイパ１３８ａ（１３８ｂ）との間に他方の円板刃１３４ｂ（１３４ａ）を位置させることが最も好ましい。この構成によれば、第１、第２の切断ローラ１３０ａ、１３０ｂが巻き込んだ水生植物等の異物を下側の円板刃１３４ａと上側の円板刃１３４ｂとが挟み込んで効果的に切断することができる。   The both ends of the first and second cutting rollers 130a and 130b are pivotally attached to the casing 128 via known bearings. At this time, the second cutting roller 130b is installed above the first cutting roller 130a, for example, directly above or obliquely forward. Further, the installation interval between the first cutting roller 130a and the second cutting roller 130b is such that the disc blade 134a of the first cutting roller 130a and the disc blade 134b of the second cutting roller 130b overlap in a side view. It is preferable to set the position. Therefore, it is preferable that the positions of the disc blades 134a and 134b and the scrapers 138a and 138b are slightly shifted in the axial direction between the first cutting roller 130a and the second cutting roller 130b. Further, the disc blade 134a and the disc blade 134b are preferably arranged close to each other, and as shown in FIG. 4, the other disc blade 134a (134b) and the scraper 138a (138b) are disposed between the other disc blade 134a and the disc blade 134b. Most preferably, the disc blade 134b (134a) is positioned. According to this configuration, the lower disc blade 134a and the upper disc blade 134b sandwich the foreign matter such as aquatic plants that the first and second cutting rollers 130a and 130b are entrained to effectively cut. Can do.

また、第１、第２の切断ローラ１３０ａ、１３０ｂの一端には歯車１３６ａ、１３６ｂが固定され、この歯車１３６ａ、１３６ｂは動力伝達機構１７４を介して第１のモータ１７０ａの減速歯車１７２ａと接続する。尚、ここでは減速歯車１７２ａと第１の切断ローラ１３０ａの歯車１３６ａとを動力伝達機構１７４としてのチェーンを介して接続し、第２の切断ローラ１３０ｂの歯車１３６ｂは第１の切断ローラ１３０ａに固定した伝達歯車１３６ｃを介して接続する例を示している。そして、第１のモータ１７０ａが回転動作することで、その回転力は減速歯車１７２ａ、チェーン（動力伝達機構１７４）、歯車１３６ａを介して第１の切断ローラ１３０ａに伝達し、これにより第１の切断ローラ１３０ａが回転する。尚、このときの第１の切断ローラ１３０ａの回転方向は図１１の矢印に示す前面視で下から上に回転する方向とする。また、第１の切断ローラ１３０ａが回転することで伝達歯車１３６ｃが回転し、この回転力は伝達歯車１３６ｃと噛合する歯車１３６ｂによって第２の切断ローラ１３０ｂに伝達し、これにより第２の切断ローラ１３０ｂが図１１の矢印に示す第１の切断ローラ１３０ａとは逆方向の前面視で上から下の方向に回転する。   In addition, gears 136a and 136b are fixed to one ends of the first and second cutting rollers 130a and 130b, and the gears 136a and 136b are connected to a reduction gear 172a of the first motor 170a via a power transmission mechanism 174. . Here, the reduction gear 172a and the gear 136a of the first cutting roller 130a are connected via a chain as the power transmission mechanism 174, and the gear 136b of the second cutting roller 130b is fixed to the first cutting roller 130a. An example of connection through the transmission gear 136c is shown. Then, as the first motor 170a rotates, the rotational force is transmitted to the first cutting roller 130a via the reduction gear 172a, the chain (power transmission mechanism 174), and the gear 136a. The cutting roller 130a rotates. Note that the rotation direction of the first cutting roller 130a at this time is a direction in which the first cutting roller 130a rotates from the bottom to the top in the front view shown by the arrow in FIG. Further, the transmission gear 136c is rotated by the rotation of the first cutting roller 130a, and this rotational force is transmitted to the second cutting roller 130b by the gear 136b meshing with the transmission gear 136c, thereby the second cutting roller. 130b rotates from the top to the bottom as viewed from the front in the opposite direction to the first cutting roller 130a indicated by the arrow in FIG.

またこのとき、歯車１３６ｂのギア比を伝達歯車１３６ｃよりも大きくするなどして、第２の切断ローラ１３０ｂの回転速度を第１の切断ローラ１３０ａの回転速度より遅くすることが好ましい。この構成によれば第１の切断ローラ１３０ａの円板刃１３４ａと第２の切断ローラ１３０ｂの円板刃１３４ｂとが異なる速度で回転し、異物等に対する切断能力をさらに向上させることができる。また、下側の第１の切断ローラ１３０ａの回転速度を速くすることで、第１の切断ローラ１３０ａが底泥Ｒを撹拌する役割も果たすことができる。尚、第１の切断ローラ１３０ａと第２の切断ローラ１３０ｂとの回転速度の比は、１：４〜１：８程度が好ましく、１：６程度が最も好ましい。   At this time, it is preferable to make the rotation speed of the second cutting roller 130b slower than the rotation speed of the first cutting roller 130a, for example, by making the gear ratio of the gear 136b larger than that of the transmission gear 136c. According to this configuration, the disc blade 134a of the first cutting roller 130a and the disc blade 134b of the second cutting roller 130b rotate at different speeds, and the cutting ability against foreign matters can be further improved. Further, by increasing the rotational speed of the lower first cutting roller 130a, the first cutting roller 130a can also serve to agitate the bottom mud R. The ratio of the rotation speeds of the first cutting roller 130a and the second cutting roller 130b is preferably about 1: 4 to 1: 8, and most preferably about 1: 6.

また、剥離ローラ１６０は円柱状のローラ１６２と、このローラ１６４の周面に設置された剥離部材１６４と、を有している。そして、剥離ローラ１６０の両端は周知の軸受を介して筐体部１２８に回転可能に軸着される。このときの剥離ローラ１６０の位置は剥離部材１６４がポンプ部１２０の吸引口に接触もしくは近接する位置とする。尚、剥離部材１６４に関しては特に限定はなく、合成樹脂製のブラシやヘラ部材等を用いることができる。そして、剥離ローラ１６０の一端には図示しない歯車が固定され、この歯車はチェーン等の図示しない動力伝達機構を介して第２のモータ１７０ｂの減速歯車１７２ｂと接続する。そして、第２のモータ１７０ｂが回転動作することで、その回転力は減速歯車１７２ｂ、動力伝達機構、歯車を介して剥離ローラ１６０に伝達し、これにより剥離ローラ１６０が回転する。尚、このときの剥離ローラ１６０の回転方向に特に限定はないが、図１１の矢印に示す前面視で上から下に回転する方向が機械構成上好ましい。   Further, the peeling roller 160 includes a cylindrical roller 162 and a peeling member 164 installed on the peripheral surface of the roller 164. Then, both ends of the peeling roller 160 are rotatably attached to the housing portion 128 via a known bearing. The position of the peeling roller 160 at this time is a position where the peeling member 164 is in contact with or close to the suction port of the pump unit 120. The peeling member 164 is not particularly limited, and a synthetic resin brush, a spatula member, or the like can be used. A gear (not shown) is fixed to one end of the peeling roller 160, and this gear is connected to a reduction gear 172b of the second motor 170b via a power transmission mechanism (not shown) such as a chain. Then, as the second motor 170b rotates, the rotational force is transmitted to the peeling roller 160 via the reduction gear 172b, the power transmission mechanism, and the gear, whereby the peeling roller 160 rotates. In addition, although there is no limitation in particular in the rotation direction of the peeling roller 160 at this time, the direction rotated from top to bottom in the front view shown by the arrow in FIG.

また、ポンプ部１２０に関してはある程度の粘性を有する流動体を吸引可能な物であれば特に限定はなく、中でも周知の水中サンドポンプを用いることが特に好ましい。   The pump unit 120 is not particularly limited as long as it can suck a fluid having a certain degree of viscosity, and it is particularly preferable to use a well-known underwater sand pump.

次に、本発明に係る撹拌剥離式吸引装置１８０と撹拌剥離式吸引システム１０２の動作及びこれらを用いた本発明に係る撹拌剥離式吸引工法に関して説明する。   Next, the operation of the agitation / removal suction device 180 and the agitation / removal suction system 102 according to the present invention and the agitation / removal suction method according to the present invention using these will be described.

先ず、底泥処理装置１１４を浚渫を行う貯水池、池、湖沼、掘等の陸側に設置する。次に、撹拌剥離式吸引装置１８０及び中継ポンプ１１６を搭載した台船１１０を水面の所定の位置に配置する。このときの台船１１０の設置方法には特に限定はない。次に、中継ポンプ１１６と撹拌剥離式吸引装置１８０とを送水ホース１１２で接続し、中継ポンプ１１６と底泥処理装置１１４とを中継ホース１１８で接続する。次に、作業者はスライド板１２９の位置を調整し、前面開口部の開口幅を適切なものとする。   First, the bottom mud treatment device 114 is installed on the land side such as a reservoir, pond, lake, or excavation where dredging is performed. Next, the trolley 110 equipped with the stirring / separation type suction device 180 and the relay pump 116 is disposed at a predetermined position on the water surface. There is no particular limitation on the method of installing the carriage 110 at this time. Next, the relay pump 116 and the stirring and peeling type suction device 180 are connected by the water supply hose 112, and the relay pump 116 and the bottom mud treatment device 114 are connected by the relay hose 118. Next, the operator adjusts the position of the slide plate 129 so that the opening width of the front opening is appropriate.

次に、作業者が移動手段１５０等を操作して撹拌剥離式吸引装置１８０を台船１１０から水底に下ろす。次に作業者が撹拌剥離式吸引システム１０２を動作させる。これにより、撹拌剥離式吸引装置１８０の第１のモータ１７０ａと第２のモータ１７０ｂとが回転動作し、撹拌ローラ１４０と剥離ローラ１６０とが前面視で上から下に回転する。また、第１の切断ローラ１３０ａが前面視で下から上に回転し、第２の切断ローラ１３０ｂが前面視で上から下に回転する。また、ポンプ部１２０、中継ポンプ１１６が稼働して吸引動作を行う。これにより、撹拌ローラ１４０が水底に堆積した底泥Ｒ、土砂等の堆積物を撹拌し第１の切断ローラ１３０ａ側に舞い上げるとともに、水生植物や枯れ枝等の植物性堆積物、ゴミ等の異物を舞い上げもしくは引き抜いて第１の切断ローラ１３０ａ側に送る。そして、舞い上げられた底泥Ｒや土砂等の比較的粒子の細かなものは第１の切断ローラ１３０ａ及び第２の切断ローラ１３０ｂの間隙を通過してポンプ部１２０側に移動する。また、水生植物、植物性堆積物、ゴミ等の異物は第１の切断ローラ１３０ａと第２の切断ローラ１３０ｂの間隙に巻き込まれ、第１の切断ローラ１３０ａの円板刃１３４ａと第２の切断ローラ１３０ｂの円板刃１３４ｂによって適度な長さに切断される。そして、後方のポンプ部１２０側に排出される。尚、前述のように筐体部１２８の上面、奥面、両側面１２８ａは閉塞されているから、舞い上げられた底泥Ｒ等が筐体部１２８の外側に漏れることはほとんど無く、水の透明度を維持しながら作業することができる。   Next, the operator operates the moving means 150 and the like to lower the stirring / separation type suction device 180 from the carriage 110 to the bottom of the water. Next, the operator operates the stirring / separation type suction system 102. As a result, the first motor 170a and the second motor 170b of the stirring / separating suction device 180 rotate, and the stirring roller 140 and the peeling roller 160 rotate from top to bottom as viewed from the front. Further, the first cutting roller 130a rotates from the bottom to the top when viewed from the front, and the second cutting roller 130b rotates from the top to the bottom when viewed from the front. Further, the pump unit 120 and the relay pump 116 are operated to perform a suction operation. Thereby, the agitation roller 140 agitates sediments such as bottom mud R and earth and sand accumulated on the bottom of the water and soars to the first cutting roller 130a side, and also includes foreign matter such as aquatic plants, plant deposits such as dead branches, and dust. Is lifted or pulled out and sent to the first cutting roller 130a side. Then, the relatively fine particles such as the bottom mud R and the earth and sand that have moved up pass through the gap between the first cutting roller 130a and the second cutting roller 130b and move to the pump unit 120 side. Further, foreign matters such as aquatic plants, plant deposits, and dust are caught in the gap between the first cutting roller 130a and the second cutting roller 130b, and the disc blade 134a and the second cutting blade of the first cutting roller 130a. It is cut into an appropriate length by the disk blade 134b of the roller 130b. And it is discharged | emitted by the back pump part 120 side. As described above, since the upper surface, back surface, and both side surfaces 128a of the casing 128 are closed, the raised bottom mud R or the like hardly leaks to the outside of the casing 128. You can work while maintaining transparency.

ポンプ部１２０はこれら底泥Ｒ及び切断された異物等を水ごと吸引し送水ホース１１２を通して中継ポンプ１１６側に圧送する。尚、異物は前述のように第１、第２の切断ローラ１３０ａ、１３０ｂによって適度な大きさに切断されているため、ポンプ部１２０の吸引口に引っ掛かることはない。また、仮にポンプ部１２０の吸引口に引っ掛かった場合でも剥離ローラ１６０がこれを除去し第１、第２切断ローラ１３０ａ、１３０ｂの側に送る。そして、第１、第２の切断ローラ１３０ａ、１３０ｂによって再度、切断処理される。これにより、ポンプ部１２０の吸引口に異物が詰まることはなく、ポンプ部１２０の吸引能力を良好な状態で維持することができる。そして、作業者は移動手段１５０を適宜操作して撹拌剥離式吸引装置１８０を水底で移動させる。これにより、新たな底泥Ｒがスライド板１２９で制限された前面開口部を通して筐体部１２８内に取り込まれ、連続して吸引、圧送される。   The pump unit 120 sucks the bottom mud R and the cut foreign matter together with water, and pumps it through the water supply hose 112 to the relay pump 116 side. In addition, since the foreign material is cut into an appropriate size by the first and second cutting rollers 130a and 130b as described above, the foreign matter is not caught by the suction port of the pump unit 120. Moreover, even if it is caught in the suction port of the pump unit 120, the peeling roller 160 removes it and sends it to the first and second cutting rollers 130a and 130b. Then, the cutting process is performed again by the first and second cutting rollers 130a and 130b. Thereby, the suction port of the pump unit 120 is not clogged with foreign matter, and the suction capability of the pump unit 120 can be maintained in a good state. Then, the operator appropriately operates the moving means 150 to move the stirring / separating type suction device 180 at the bottom of the water. As a result, new bottom mud R is taken into the casing 128 through the front opening limited by the slide plate 129, and continuously sucked and pumped.

ポンプ部１２０によって吸引された底泥Ｒ、土砂、水、異物等は、送水ホース１１２を通って中継ポンプ１１６に送られ、中継ホース１１８を介して底泥処理装置１１４に圧送される。そして先ず、篩や遠心分離装置等の周知の分離手段によって異物や小石、砂等が分離除去される。次に、沈殿槽などの周知の底泥Ｒ分離手段に溜められ、例えば凝集剤が投入される。これにより、底泥Ｒが凝集沈殿し水と分離する。分離した水は放水管１１５を通して元の池等に放流される。また、沈殿濃縮した底泥Ｒは例えば脱水手段に送られて脱水された後、回収され、然るべき処理に付される。   Bottom mud R, earth and sand, water, foreign matter, etc. sucked by the pump unit 120 are sent to the relay pump 116 through the water supply hose 112 and are pumped to the bottom mud treatment device 114 through the relay hose 118. First, foreign substances, pebbles, sand and the like are separated and removed by known separation means such as a sieve and a centrifugal separator. Next, it is stored in a well-known bottom mud R separation means such as a sedimentation tank, and for example, a flocculant is charged. Thereby, the bottom mud R aggregates and separates from the water. The separated water is discharged to the original pond or the like through the discharge pipe 115. Further, the sediment-concentrated bottom mud R is, for example, sent to a dehydrating means, dehydrated, recovered, and subjected to appropriate processing.

以上のように、本発明に係る撹拌剥離式吸引装置１８０は、前面視で下から上に回転する第１の切断ローラ１３０ａと、この第１の切断ローラ１３０ａの上方に位置し前面視で上から下の方向に回転する第２の切断ローラ１３０ｂとを有している。そして、これら第１、第２の切断ローラ１３０ａ、１３０ｂが水底に堆積もしくは繁茂している水生植物等の異物をポンプ部１２０が吸引可能なサイズに切断する。このためポンプ部１２０の吸引口に異物が詰まることがなく、ポンプ部１２０の吸引能力を良好な状態で維持することができる。これにより、底泥Ｒの吸引作業を長時間連続して行うことができる。   As described above, the agitation / peeling suction device 180 according to the present invention includes the first cutting roller 130a that rotates from the bottom to the top in the front view, and is positioned above the first cutting roller 130a and the top in the front view. And a second cutting roller 130b that rotates downward. Then, the first and second cutting rollers 130a and 130b cut the foreign matter such as aquatic plants accumulated on the bottom of the water into a size that can be sucked by the pump unit 120. For this reason, the suction port of the pump unit 120 is not clogged with foreign matter, and the suction capability of the pump unit 120 can be maintained in a good state. Thereby, the suction operation | work of the bottom mud R can be performed continuously for a long time.

また、本発明に係る撹拌剥離式吸引装置１８０は、第１、第２の切断ローラ１３０ａ、１３０ｂの前側に撹拌ローラ１４０を有している。この撹拌ローラ１４０は水底に堆積した底泥Ｒ、土砂等の堆積物を撹拌してポンプ部１２０での吸引を補助するとともに、水生植物や枯れ枝等の植物性堆積物、ゴミ等の異物を舞い上げもしくは引き抜いて第１の切断ローラ１３０ａ側に送る。これにより、第１、第２の切断ローラ１３０ａ、１３０ｂへの負荷が軽減し、異物の 切断を円滑に行うことができる。   Further, the stirring / separation type suction device 180 according to the present invention has a stirring roller 140 on the front side of the first and second cutting rollers 130a and 130b. The agitating roller 140 agitates sediments such as bottom mud R and earth and sand accumulated on the bottom of the water to assist suction by the pump unit 120, and also flits foreign matter such as aquatic plants, dead branches and other plant sediments, and dust. It is raised or pulled out and sent to the first cutting roller 130a side. As a result, the load on the first and second cutting rollers 130a and 130b is reduced, and the foreign matter can be cut smoothly.

このとき、本発明に係る撹拌剥離式吸引装置１８０は、筐体部１２８の上面、奥面、両側面１２８ａが閉塞されているため、筐体部１２８内で撹拌された底泥Ｒ等が筐体部１２８の外側に漏れることは無く、湖沼の透明度を維持しながら作業することができる。また、底泥Ｒの堆積状態を維持して効果的な回収作業を行う事ができる。特に底泥Ｒが放射性物質を含んでいる場合には、これら放射性物質を再拡散することなく、効率的な除染を行うことができる。さらに、底泥Ｒの厚み等に応じてスライド板１２９の位置を調整し前面開口部の開口幅を最適化することで、適した濃度の底泥Ｒを底泥処理装置１１４側へ圧送することができる。   At this time, since the top surface, the back surface, and both side surfaces 128a of the casing unit 128 are closed, the stirring / separation type suction device 180 according to the present invention is configured so that the bottom mud R or the like stirred in the casing unit 128 is enclosed in the casing. It does not leak to the outside of the body part 128 and can work while maintaining the transparency of the lake. In addition, it is possible to perform an effective recovery operation while maintaining the accumulation state of the bottom mud R. In particular, when the bottom mud R contains radioactive substances, efficient decontamination can be performed without re-diffusion of these radioactive substances. Further, by adjusting the position of the slide plate 129 according to the thickness of the bottom mud R and optimizing the opening width of the front opening, the bottom mud R having an appropriate concentration is pumped to the bottom mud treatment device 114 side. Can do.

またさらに、本発明に係る撹拌剥離式吸引装置１８０は、ポンプ部１２０の吸引口の近傍に剥離ローラ１６０を有している。この剥離ローラ１６０はポンプ部１２０の吸引口をスイープして、仮に異物がポンプ部１２０の吸引口に引っ掛かった場合でもこれを除去することができる。これにより、底泥Ｒの吸引作業を安定して長時間連続して行うことができる。   Furthermore, the agitation / peeling suction device 180 according to the present invention has a peeling roller 160 in the vicinity of the suction port of the pump unit 120. The peeling roller 160 sweeps the suction port of the pump unit 120, and even if a foreign object is caught on the suction port of the pump unit 120, it can be removed. Thereby, the suction work of the bottom mud R can be stably performed continuously for a long time.

そして、この撹拌剥離式吸引装置１８０を備えた本発明に係る撹拌剥離式吸引システム１０２及び撹拌剥離式吸引工法は、底泥Ｒの吸引作業を効率良く長時間連続して行うことができる。   And the stirring peeling type suction system 102 and the stirring peeling type suction method according to the present invention provided with the stirring peeling type suction device 180 can perform the suction work of the bottom mud R efficiently and continuously for a long time.

尚、本例で示した撹拌剥離式吸引装置１８０、撹拌剥離式吸引システム１０２の各部の形状、構成、動作機構、配置、配管経路等は一例であり、本発明の要旨を逸脱しない範囲で変更して実施することが可能である。   It should be noted that the shape, configuration, operation mechanism, arrangement, piping route, etc. of each part of the stirring / separation type suction device 180 and the stirring / separation type suction system 102 shown in this example are examples, and can be changed without departing from the scope of the present invention. Can be implemented.

脱水工程Ｘは、掘削された底泥Ｒ又は土壌Ｔから水分を除去するための自然脱水もしくは加圧脱水する工程であり、具体的には、底泥Ｒ又は土壌Ｔを水切りフレコンＱに詰めて余分な水分を排出する工程である。   The dehydration process X is a process of natural dehydration or pressure dehydration for removing moisture from the excavated bottom mud R or soil T. Specifically, the bottom mud R or soil T is packed in a draining flexible container Q. This is a process of discharging excess moisture.

セシウム濃度測定・処理工程Ｙは、フレコンに詰めた底泥Ｒ又は土壌Ｔの放射性セシウムを含む濁水等からその濃度を測定し細粒分に分級し、脱水処理機へ用いて線量の拡散が生じないように処理を行う工程である。   The cesium concentration measurement / treatment process Y measures the concentration from the turbid water containing radioactive cesium in the bottom mud R or soil T packed in flexible containers, classifies it into fine particles, and diffuses the dose when used in a dehydrator This is a process for performing processing so as not to occur.

肥料成分調整・処理工程Ｚは、脱水処理後の土壌Ｔにおいて有機肥料を含む土壌として使用できる部分を有効利用するための工程であり、係る土壌の成分を分析し作物の種類に対応するように、肥料の三大栄養素といわれる窒素、リン酸、カリウムを添加し、望ましくはこれにカルシウム、マグネシウム、更には銅、亜鉛などの必須元素を添加し、各種の植物の種類や栽培方法に適合した土壌を得る工程である。係る工程を経ることにより処理すべき土壌と有効利用可能な土壌を区別し地球環境への負荷を軽減することができる。   The fertilizer component adjustment / treatment step Z is a step for effectively using a portion that can be used as soil containing organic fertilizer in the soil T after the dehydration treatment, and analyzes the components of the soil so as to correspond to the type of crop. Nitrogen, phosphoric acid, and potassium, which are said to be the three major nutrients of fertilizers, are added, preferably calcium, magnesium, and even copper, zinc and other essential elements added to suit various plant types and cultivation methods. It is a process of obtaining soil. By passing through such a process, the soil to be treated can be distinguished from the soil that can be effectively used, and the load on the global environment can be reduced.

本発明は、雨水排水が集まる雨水調整池、溜め池P等のような、土砂・落葉等が集積することにより放射性物質が濃集（蓄積）し、高い濃度の放射性物質が観測される調整池、溜め池等の除染作業において、装軌車両の無限軌道による土壌Ｔの攪拌を防止するとともに、効果的な除染作業を行うことを可能にするものであり、除染作業に伴う土木の分野において、産業上の利用可能性は高いものと思慮される。   The present invention is a rainwater control pond where rainwater drainage collects, a reservoir pond P, etc., where radioactive materials are concentrated (accumulated) due to accumulation of earth and sand, fallen leaves, etc. In the decontamination work such as a reservoir, it is possible to prevent the soil T from being agitated by the endless track of the tracked vehicle and to perform an effective decontamination work. In the field, industrial applicability is considered high.

１ 汚染土壌層の掘削工法
１０ 装軌車両
１１ 無限軌道
２０ 支持杭
２１ 杭頭
３０ 敷板
４０ 搬送路
４１ 敷設開始位置
４２ 撤去開始位置
４３ 荷役ステージ
４４ 水処理機械ヤード
５０ 敷設方向
６０ 撤去方向
７０ 置換え敷設方向
８０ 置換え撤去方向
９０ 撤去方向
Ａ 支持杭打設工程
Ｂ 敷板敷設工程
Ｃ 掘削パスの確認及び施工前掘削深さの確認工程
Ｄ 粗除根工程
Ｅ 掘削工程
Ｆ 撤去工程
Ｇ 敷板撤去後の掘削工程
Ｈ 施工後の掘削深さの確認工程
Ｉ 簡易セシウム濃度測定工程
Ｊ 杭頭切断工程
Ｋ ステップ
Ｒ 底泥
Ｓ 堤体
Ｔ 土壌
N 汚染土壌層の掘削工法領域
Ｐ 溜め池（撹拌剥離式吸引工法領域）
１０１ 撹拌剥離式吸引工法
１０２ 撹拌剥離式吸引システム
１１０ 台船
１１２ 送水ホース
１１４ 底泥処理装置
１２０ ポンプ部
１２８ 筐体部
１２８ａ 側面
１２９ スライド板
１３０ａ 第１の切断ローラ
１３０ｂ 第２の切断ローラ
１３４ａ、１３４ｂ 円板刃
１４０ 撹拌ローラ
１５０ 移動手段
１５０ａ 牽引手段
１５０ｂ シャフト式移動手段
１５４ ワイヤ
１５６ シャフト
１６０ 剥離ローラ
１８０ 撹拌剥離式吸引装置
２０１ 肥料製造方法 DESCRIPTION OF SYMBOLS 1 Excavation method of contaminated soil layer 10 Tracked vehicle 11 Endless track 20 Pile 21 Pile head 30 Pile plate 40 Transfer path 41 Laying start position 42 Removal start position 43 Handling stage 44 Water treatment machine yard 50 Laying direction 60 Removal direction 70 Replacement laying Direction 80 Replacement removal direction 90 Removal direction A Support pile placing process B Laying board laying process C Confirmation of excavation path and confirmation of excavation depth before construction D Rough root removal process E Excavation process F Removal process G Excavation process H after removal of floorboard Drilling depth confirmation process after construction I Simplified cesium concentration measurement process J Pile head cutting process K Step R Bottom mud S Dam body T Soil
N Excavation method area P of contaminated soil layer P Reservoir (Agitation separation type suction method area)
DESCRIPTION OF SYMBOLS 101 Agitation peeling type suction method 102 Agitation peeling type suction system 110 Carrier 112 Water supply hose 114 Bottom mud processing device
120 Pump part
128 Case
128a side
129 slide plate
130a First cutting roller
130b Second cutting roller
134a, 134b Disc blade
140 Stirring roller
150 Moving means
150a Towing means
150b Shaft type moving means
154 wire
156 shaft
160 Peeling roller
180 Agitation peel type suction device
201 fertilizer Manufacturing method

Claims (2)

溜め池において、水が引いた部分は汚染土壌層の掘削工法（１）を用いることを基本構成とし、水が溜まっている部分は底泥（Ｒ）を水ごと吸引する撹拌剥離式吸引工法（１０１）を用いることで、溜め池全体を総合的に除染する工法において、
前記汚染土壌層の掘削工法（１）が、
装軌車両（１０）の無限軌道（１１）によって土壌（Ｔ）を撹拌せずに、除染作業を行う方法であって、
支持杭（２０）を打設する支持杭打設工程（Ａ）と、
敷板（３０）を敷設する敷板敷設工程（Ｂ）と、
掘削工程（Ｅ）と、
敷板（３０）の撤去工程（Ｆ）と、
敷板撤去後の掘削工程（Ｇ）と、
杭頭切断工程（Ｊ）と、
から構成され、
前記敷板敷設工程（Ｂ）は、敷設された前記敷板（３０）の上を前記装軌車両（１０）が次の敷板（３０）を搬送して連設施工するという一連の工程と前記支持杭打設工程（Ａ）を繰り返すことで前記装軌車両（１０）の搬送路（４０）を施工するものであり、
前記掘削工程（Ｅ）は、前記敷板（３０）を撤去しながら掘削するものであり、
前記杭頭切断工程（Ｊ）は、掘削し終わった場所の支持杭（２０）は掘削面に合わせて杭頭（２１）を切断処理する工法であり、
前記撹拌剥離式吸引工法（１０１）が、
前面と底面が開口し上面と奥面と両側面（１２８ａ）とが閉塞し、
前面には、スライド可能に設置され、前記前面の開口の幅を変化させるスライド板（１２９）を備えた筐体部（１２８）を有するとともに、
前方に位置し底泥Ｒを撹拌する撹拌ローラ（１４０）と、前記撹拌ローラ（１４０）の後方に位置し複数の円板刃（１３４ａ）が周面に設けられた第１の切断ローラ（１３０ａ）と、前記第１の切断ローラ（１３０ａ）の上方に位置し複数の円板刃（１３４ｂ）が周面に設けられた第２の切断ローラ（１３０ｂ）と、前記第１の切断ローラ（１３０ａ）と第２の切断ローラ（１３０ｂ）の後方に吸引口が位置し底泥（Ｒ）を水ごと吸引するポンプ部（１２０）と、前記ポンプ部（１２０）と接続し吸引した底泥（Ｒ）を台船（１１０）側に送る送水ホース（１１２）と、を有し、前記第１の切断ローラ（１３０ａ）は前面視で下から上に回転するとともに、前記第２の切断ローラ（１３０ｂ）は前面視で上から下に回転し、前記第１の切断ローラ（１３０ａ）と第２の切断ローラ（１３０ｂ）の間隙に巻き込んだ異物を前記第１の切断ローラ（１３０ａ）と第２の切断ローラ（１３０ｂ）の円板刃（１３４ａ、１３４ｂ）が切断する撹拌剥離式吸引装置（１８０）と、
水面に位置するとともに前記撹拌剥離式吸引装置（１８０）を水底に吊り下げる前記台船（１１０）と、
陸側に設けられた底泥処理装置（１１４）と、
前記撹拌剥離式吸引装置（１８０）が吸引した底泥（Ｒ）を前記底泥処理装置（１１４）に送るホース部材と、
前記撹拌剥離式吸引装置（１８０）を移動させるための移動手段（１５０）とを有し、該移動手段（１５０）がワイヤ（１５４）によって前記撹拌剥離式吸引装置（１８０）を牽引して移動させる牽引手段（１５０ａ）もしくは前記撹拌剥離式吸引装置（１８０）に一端が固定されたシャフト（１５６）を押し引きして移動させるシャフト式移動手段（１５０ｂ）である撹拌剥離式吸引システム（１０２）を用い、
前記台船（１１０）を水面の所定の位置に配置するステップ（Ｋ1）と、
前記台船（１１０）から前記撹拌剥離式吸引装置（１８０）を水底に下ろすステップ（Ｋ２）と、
前記撹拌剥離式吸引装置（１８０）を動作させ、前記撹拌ローラ（１４０）が底泥（Ｒ）を撹拌して掻き上げ、前記第１の切断ローラ（１３０ａ）と前記第２の切断ローラ（１３０ｂ）とが異物を切断し、前記ポンプ部（１２０）が底泥（Ｒ）と切断された異物と水とを吸引するステップ（Ｋ３）と、
吸引した底泥（Ｒ）と切断された異物と水とをホース部材を介して前記底泥処理装置（１１４）に圧送するステップ（Ｋ４）と、
前記底泥処理装置（１１４）が底泥（Ｒ）を異物と水から分離して回収するステップ（Ｋ５）と、
前記撹拌剥離式吸引装置（１８０）を水底で移動させるステップ（Ｋ６）と、
から成る工法であることを特徴とする溜め池総合除染工法（３）。 In the reservoir, the part where water is drawn is basically constructed using the excavation method (1) of the contaminated soil layer, and the part where water is accumulated is the agitation and peeling type suction method that sucks the bottom mud (R) together with water ( 101), in the method of comprehensive decontamination of the entire reservoir,
Excavation method (1) of the contaminated soil layer is
The endless track (11) of the tracklaying vehicle (10) soil (T) without 撹拌, a method of performing decontamination,
A support pile placing step (A) for placing the support pile (20);
A laying plate laying step (B) for laying the laying plate (30);
Excavation process (E);
The removal process (F) of the floorboard (30),
Excavation process (G) after removing the floorboard,
Pile head cutting process (J),
Consisting of
The laying plate laying step (B) includes a series of steps in which the tracked vehicle (10) conveys and installs the next laying plate (30) on the laid laying plate (30) and the supporting pile. By constructing the conveying path (40) of the tracked vehicle (10) by repeating the placing step (A),
The excavation step (E) is to excavate while removing the floorboard (30),
In the pile head cutting step (J), the support pile (20) in the place where excavation has been completed is a method of cutting the pile head (21) according to the excavation surface,
The 撹拌peelable suction method (101),
The front and bottom surfaces are open and the top surface, back surface, and both side surfaces (128a) are closed,
The front surface has a housing (128) that is slidably installed and includes a slide plate (129) that changes the width of the opening of the front surface.
An agitation roller (140) for agitating the bottom mud R located in the front, and a first cutting roller (130a) located behind the agitation roller (140) and provided with a plurality of disk blades (134a) on the circumferential surface ), A second cutting roller (130b) positioned above the first cutting roller (130a) and provided with a plurality of disk blades (134b) on the peripheral surface, and the first cutting roller (130a) ) And the second cutting roller (130b), the suction port is located behind the pump part (120) for sucking the bottom mud (R) together with water, and the bottom mud (R) connected to the pump part (120) and sucked. ) and barge (110) to the side water supply hose (112) has a, together with the first cutting roller (130a) rotates from bottom to top in front view, the second cutting roller (130b ) Rotates from top to bottom when viewed from the front, and the first cutting rod The disc blades (134a, 134b) of the first cutting roller (130a) and the second cutting roller (130b) cut the foreign matter caught in the gap between the roller (130a) and the second cutting roller (130b). A stirring and peeling type suction device (180);
The stirring peeling type suction device (180) said barge to a hung underwater while positioned on the water surface (110),
A bottom mud treatment device (114) provided on the land side;
A hose member for sending the bottom mud (R) sucked by the stirring and peeling type suction device (180) to the bottom mud treatment device (114);
Moving means (150) for moving the stirring / separating suction device (180), and the moving means (150) moves by pulling the stirring / peeling suction device (180) by a wire (154). traction means (150a) or the stirring peeling type suction device (180) to press the shaft (156) which is fixed one end pulled by the shaft-type moving means for moving (150b) stirred peelable aspiration system Ru der to (102 )
Placing the trolley (110) at a predetermined position on the water surface (K1);
Lowering the stirring and peeling type suction device (180) from the carriage (110) to the bottom of the water (K2);
The stirring and peeling type suction device (180) is operated, and the stirring roller (140) stirs and scrapes the bottom mud (R), and the first cutting roller (130a) and the second cutting roller (130b). ) Cuts foreign matter, and the pump part (120) sucks the bottom mud (R), the cut foreign matter and water (K3),
A step (K4) of pumping the sucked bottom mud (R), the cut foreign matter and water to the bottom mud treatment device (114) through a hose member;
The bottom mud treatment device (114) separates and collects the bottom mud (R) from foreign matter and water (K5);
Moving the stirring and peeling type suction device (180) at the bottom of the water (K6);
Reservoir pond decontamination method (3), characterized in that it consists of 前記汚染土壌層の掘削工法（１）により掘削された底泥（Ｒ）、又は前記撹拌剥離式吸引工法（１０１）により吸引された底泥（Ｒ）を、自然脱水若しくは加圧脱水する脱水工程（Ｘ）、セシウム濃度測定・処理工程（Ｙ）、並びに肥料成分調整・処理工程（Ｚ）を経て肥料を得ることを特徴とする請求項１に記載の溜め池総合除染工法（３）を利用した肥料製造方法（２０１）。
The sediment excavated by drilling method of the contaminated soil layers (1) (R), or sediment (R) is sucked by the 撹拌peelable suction method (101), naturally dehydrated or under圧脱water dehydration step (X), cesium concentration measurement and processing step (Y), as well as nutrients adjustment and process pond comprehensive decontamination method of claim 1, (Z) via; and obtaining fertilizer (3 ) Fertilizer manufacturing method (201).
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