JP3605666B2 - Seawall formation of seawall - Google Patents

Seawall formation of seawall Download PDF

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Publication number
JP3605666B2
JP3605666B2 JP32244095A JP32244095A JP3605666B2 JP 3605666 B2 JP3605666 B2 JP 3605666B2 JP 32244095 A JP32244095 A JP 32244095A JP 32244095 A JP32244095 A JP 32244095A JP 3605666 B2 JP3605666 B2 JP 3605666B2
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JP
Japan
Prior art keywords
seawall
bag
water
present
soil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP32244095A
Other languages
Japanese (ja)
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JPH09143956A (en
Inventor
弘志 松下
博 新舎
守 神徳
昭夫 中尾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Penta Ocean Construction Co Ltd
Original Assignee
Penta Ocean Construction Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Penta Ocean Construction Co Ltd filed Critical Penta Ocean Construction Co Ltd
Priority to JP32244095A priority Critical patent/JP3605666B2/en
Publication of JPH09143956A publication Critical patent/JPH09143956A/en
Application granted granted Critical
Publication of JP3605666B2 publication Critical patent/JP3605666B2/en
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Expired - Fee Related legal-status Critical Current

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  • Treatment Of Sludge (AREA)
  • Revetment (AREA)
  • Processing Of Solid Wastes (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は護岸の遮水層形成体、特に沿岸部における産業廃棄物最終処分場などの管理型護岸の遮水層形成体に関するものである。
【0002】
【従来の技術】
従来、産業廃棄物最終処分場などの管理型護岸に対しては、産業廃棄物に含まれる有害物質の流出を防止するために、遮水シートまたは鋼矢板、またはこれらの組み合わせなどによる遮水工法が用いられている。
【0003】
【発明が解決しようとする課題】
然しながら、例えば水深20m以上の大水深域に建設される重力式護岸の場合、潜水士による遮水シートの敷設が困難となり、また、鋼矢板構造は非常に大規模になるという問題がある。
【0004】
本発明は、上記問題を解決するようにした、安全、確実でかつ施工が容易な、完全機械化施工による護岸の遮水層形成体を提供するものである。
【0005】
【課題を解決するための手段】
本発明の護岸の遮水層形成は、海中における護岸の所定位置に積重せしめた、粘性土と固化材を充填した透水性の多数の袋と、この各袋にその外周からはみ出るように取り付けた高吸水性ポリマーを内包した劣化性シートとより成る。
【0007】
【発明の実施の形態】
以下図面によって本発明の実施例を説明する。
【0008】
本発明においては、図1に示すように土運船1によって運搬された例えば浚渫土などの粘性土2をバックホウ3によってつかみ、台船4上で振動スクリーン5を介して整粒して含水比調整槽6に入れ、送水ポンプ7によって注水して泥水状の粘性土を作製し、この粘性土と固化材をミキサープラント8内で混合し、充填装置9によって透水性の袋体10に充填する。
【0009】
この袋体10は、落下装置11に載せてクレーン12によって吊り上げ、このクレーン12の頂部に取り付けたプリズム13の位置を陸上の既知点より計測して袋体10を所定の位置へ誘導し、海中に落下させ、この場合、台船4に取り付けた超音波受信器14と落下装置11に取り付けた超音波送信器15によって海中での位置を計測し、所定の位置へ誘導して海底地盤16上の基礎捨石17の法面上に落下させるようにする。
【0010】
以下、上記作業を繰り返すことによって形成された遮水層18の不陸を、台船4に取り付けた海底深査ソナー19によって計測することにより出来形管理を行なう。
【0011】
図2は本発明によって形成された護岸における基礎捨石17の法面上の遮水層18の説明図であって、21は埋立土砂(産業廃棄物)、22は覆土、23はケーソンである。
【0012】
図3は同じく基礎捨石17及び裏込石20の法面上の遮水層18の説明図、図4は上記遮水層18の拡大正面図である。
【0013】
本発明の遮水層形成用袋体10は図5〜図8に示すように透水性の化学繊維を材質として織布あるいは不織布で形成した偏平状の袋24と、この袋24の上,下何れかの面の外周部にその内周部を被着し、その外周部を上記袋24より外周よりはみ出すようにした劣化性シート25とにより構成し、上記劣化性シート25は図7に示すように高吸水性ポリマー26を内包してシート状に形成せしめる。なお、27は上下の劣化性シート25を継ぐ糸である。
【0014】
本発明においては、まず透水性の袋に注入した流動性の粘性土から浸み出る固化成分が、袋を構成する布の内部、および積み重ねられた袋体間の隙間に入り込み、不透水層を形成する。次に、袋体の周囲に取り付けた劣化性シートは海水中で約1ケ月程度で劣化するものであるが、この劣化によって、内部の高吸水性ポリマーと海水とが接触し、ポリマーが海水を吸収して膨潤し、袋体間の隙間を完全に埋めて、有害物の通り道である隙間を完全に遮水するものである。このように、本発明は、袋体から浸み出る固化成分と、高吸水性ポリマーとの2段階で、極めて確実な遮水層を形成するものである。
【0015】
なお、袋体10の袋24には流動化状態の粘性土と固化材を袋24の限界充填容量より少ない量を充填すれば変形可能であり、複数段に敷設された袋体10は相互になじみ、間隙は少なくなるうえに、この間隙は上記のように袋体を浸み出た固化成分と海水を吸収した高吸水性ポリマーが充満するため、確実に遮水層が形成され、産業廃棄物に含まれる有害物質の流出を完全に防止することができるようになる。
【0016】
また、袋24には流動化状態の粘性土と固化材を混合して充填するため、敷設後は硬化し、自重によって崩壊することがないうえ、例えば護岸の上部構造物の背面に敷設した場合は、土圧の軽減策として有効である。
【0017】
【発明の効果】
上記のように本発明の護岸の遮水層形成によれば、遮水シートを敷設する必要がなく、従って潜水士作業を行なうことなく安全確実に遮水層を形成することができる。
【0018】
また、本発明の護岸の遮水層形成体によれば、袋相互間の隙間を完全に遮水できるようになる。
【図面の簡単な説明】
【図1】本発明の護岸の遮水層形成の説明図である。
【図2】本発明によって形成した護岸の基礎捨石の法面上の遮水層の説明図である。
【図3】本発明によって形成した護岸の上部構造物背面の遮水層の説明図である。
【図4】遮水層の拡大正面図である。
【図5】本発明の遮水層形成体の正面図である。
【図6】図5に示す袋体の斜視図である。
【図7】本発明の袋体に使用する劣化性シートの説明図である。
【図8】本発明の袋体の積重ね状態説明図である。
【符号の説明】
1 土運船
2 粘性土
3 バックホウ
4 台船
5 振動スクリーン
6 含水比調整槽
7 送水ポンプ
8 ミキサープラント
9 充填装置
10 袋体
11 落下装置
12 クレーン
13 プリズム
14 超音波受信器
15 超音波送信器
16 海底地盤
17 基礎捨石
18 遮水層
19 海底深査ソナー
20 裏込石
21 埋立土砂(産業廃棄物)
22 覆土
23 ケーソン
24 袋
25 劣化性シート
26 高吸水性樹脂
27 糸
[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a water barrier layer forming body for seawalls, and more particularly to a water barrier layer forming body for a managed seawall such as an industrial waste final disposal site in a coastal area.
[0002]
[Prior art]
Conventionally, for control-type seawalls such as industrial waste final disposal sites, to prevent the outflow of harmful substances contained in industrial waste, seepage control sheets or steel sheet piles or a combination of these methods are used. Is used.
[0003]
[Problems to be solved by the invention]
However, for example, in the case of a gravity type revetment constructed in a deep water area with a water depth of 20 m or more, there is a problem that it is difficult for a diver to lay a water barrier sheet and the steel sheet pile structure becomes very large.
[0004]
An object of the present invention is to provide a watertight impermeable layer forming body of a revetment by completely mechanized construction, which is capable of solving the above-mentioned problem, and which is safe, reliable, and easy to construct.
[0005]
[Means for Solving the Problems]
The seawater barrier layer forming body of the seawall according to the present invention is stacked at a predetermined position on the seawall in the sea , and has a large number of water-permeable bags filled with a viscous soil and a solidifying material. And a degradable sheet containing the superabsorbent polymer .
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0008]
In the present invention, as shown in FIG. 1, a viscous soil 2 such as a dredged soil carried by an earth transporting vessel 1 is grasped by a backhoe 3, and sized by a vibrating screen 5 on a barge 4, and the water content is determined. It is put in the adjusting tank 6 and injected with a water pump 7 to produce muddy viscous soil. The viscous soil and the solidified material are mixed in a mixer plant 8 and filled into a water-permeable bag 10 by a filling device 9. .
[0009]
The bag body 10 is placed on a dropping device 11 and lifted by a crane 12, and the position of the prism 13 attached to the top of the crane 12 is measured from a known point on land to guide the bag body 10 to a predetermined position. In this case, the position in the sea is measured by the ultrasonic receiver 14 attached to the barge 4 and the ultrasonic transmitter 15 attached to the dropping device 11, and guided to a predetermined position, and Is dropped on the slope of the basic rubble 17.
[0010]
Hereinafter, the form management is performed by measuring the unevenness of the impermeable layer 18 formed by repeating the above operation by the seabed deep-season sonar 19 attached to the barge 4.
[0011]
FIG. 2 is an explanatory view of the impermeable layer 18 on the slope of the foundation rubble 17 at the revetment formed by the present invention, where 21 is landfill soil (industrial waste), 22 is cover soil, and 23 is a caisson.
[0012]
FIG. 3 is an explanatory view of the impermeable layer 18 on the slope of the basic rubble 17 and the backing stone 20, and FIG. 4 is an enlarged front view of the impermeable layer 18.
[0013]
As shown in FIGS. 5 to 8, the bag 10 for forming a water-impervious layer according to the present invention has a flat bag 24 made of a woven or non-woven fabric made of a water-permeable chemical fiber. A degradable sheet 25 whose inner peripheral portion is attached to the outer peripheral portion of any surface and whose outer peripheral portion protrudes from the outer periphery from the bag 24 is formed. The degradable sheet 25 is shown in FIG. As described above, the superabsorbent polymer 26 is included to form a sheet. In addition, 27 is a thread that joins the upper and lower degradable sheets 25.
[0014]
In the present invention, first, the solidified component that oozes out of the fluid viscous soil injected into the water-permeable bag enters the inside of the cloth constituting the bag, and the gap between the stacked bag bodies, and forms an impermeable layer. Form. Next, the degradable sheet attached around the bag body deteriorates in seawater in about one month. Due to this deterioration, the superabsorbent polymer inside and the seawater come into contact, and the polymer absorbs the seawater. It absorbs and swells, completely fills the gap between the bags, and completely blocks the gap that is the path of harmful substances. As described above, the present invention forms an extremely reliable water-impervious layer in two stages of the solidified component leached from the bag and the superabsorbent polymer.
[0015]
The bag 24 of the bag 10 can be deformed by filling the fluidized viscous soil and the solidified material with an amount smaller than the limit filling capacity of the bag 24, and the bags 10 laid in a plurality of stages can be mutually deformed. As well as the gaps become smaller, the gaps are filled with the solidified components that have leached out of the bag and the superabsorbent polymer that has absorbed seawater as described above, so that a water-blocking layer is reliably formed and industrial waste It is possible to completely prevent the outflow of harmful substances contained in goods.
[0016]
In addition, since the bag 24 is filled with a mixture of the viscous soil in a fluidized state and the solidifying material, the bag hardens after being laid and does not collapse by its own weight. Is effective as a measure to reduce earth pressure.
[0017]
【The invention's effect】
As described above, according to the water barrier layer forming body of the revetment of the present invention, there is no need to lay a water barrier sheet, and thus the water barrier layer can be formed safely and securely without performing diver work.
[0018]
Further, according to the water barrier layer forming body of the seawall of the present invention, it is possible to completely shield the gap between the bags.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a seawall impermeable layer forming body of the present invention.
FIG. 2 is an explanatory view of a water barrier layer on a slope of a base rubble of a revetment formed according to the present invention.
FIG. 3 is an explanatory view of a water barrier layer formed on the back surface of a seawall upper structure formed according to the present invention.
FIG. 4 is an enlarged front view of the impermeable layer.
FIG. 5 is a front view of a water impermeable layer forming body of the present invention.
6 is a perspective view of the bag shown in FIG.
FIG. 7 is an explanatory diagram of a degradable sheet used for the bag of the present invention.
FIG. 8 is an explanatory view of a stacked state of the bags of the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 soil carrier 2 clay soil 3 backhoe 4 barge 5 vibrating screen 6 water content adjustment tank 7 water pump 8 mixer plant 9 filling device 10 bag body 11 dropping device 12 crane 13 prism 14 ultrasonic receiver 15 ultrasonic transmitter 16 Submarine ground 17 Basic rubble 18 Water-blocking layer 19 Seabed deep survey sonar 20 Backing stone 21 Landfill soil (industrial waste)
22 soil covering 23 caisson 24 bag 25 degradable sheet 26 super absorbent resin 27 yarn

Claims (1)

海中における護岸の所定位置に積重せしめた、粘性土と固化材を充填した透水性の多数の袋と、この各袋にその外周からはみ出るように取り付けた高吸水性ポリマーを内包した劣化性シートとより成ることを特徴とする護岸の遮水層形成体。 A large number of water-permeable bags filled with cohesive soil and solidified material piled up at a predetermined location on the seawall, and a degradable sheet containing a superabsorbent polymer attached to each bag so as to protrude from the outer periphery. A water barrier formation of a seawall, characterized by comprising:
JP32244095A 1995-11-17 1995-11-17 Seawall formation of seawall Expired - Fee Related JP3605666B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32244095A JP3605666B2 (en) 1995-11-17 1995-11-17 Seawall formation of seawall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32244095A JP3605666B2 (en) 1995-11-17 1995-11-17 Seawall formation of seawall

Publications (2)

Publication Number Publication Date
JPH09143956A JPH09143956A (en) 1997-06-03
JP3605666B2 true JP3605666B2 (en) 2004-12-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP32244095A Expired - Fee Related JP3605666B2 (en) 1995-11-17 1995-11-17 Seawall formation of seawall

Country Status (1)

Country Link
JP (1) JP3605666B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100771465B1 (en) * 2004-01-27 2007-10-30 한송본 Large tetrapot construction method
JP5603154B2 (en) * 2010-07-08 2014-10-08 鹿島建設株式会社 Same day covering unit
CN104923542A (en) * 2015-05-25 2015-09-23 江苏鑫泰岩土科技有限公司 S-shaped filling infiltration bag for silt of river channels and lakes, mud and sand of tailings and building mud, manufacturing method thereof and application method thereof
JP6749809B2 (en) * 2016-08-01 2020-09-02 丈示 嶋 Weir and construction method of weir
CN110397051A (en) * 2019-07-09 2019-11-01 中国铁建港航局集团有限公司 A kind of cofferdam structure and construction method
JP7044335B1 (en) * 2021-05-31 2022-03-30 国立研究開発法人 海上・港湾・航空技術研究所 Submarine ground root consolidation structure and root consolidation method

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JPH09143956A (en) 1997-06-03

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