JPH07158047A - High moisture content soil improving material and construction method for road bed and banking - Google Patents

High moisture content soil improving material and construction method for road bed and banking

Info

Publication number
JPH07158047A
JPH07158047A JP32921993A JP32921993A JPH07158047A JP H07158047 A JPH07158047 A JP H07158047A JP 32921993 A JP32921993 A JP 32921993A JP 32921993 A JP32921993 A JP 32921993A JP H07158047 A JPH07158047 A JP H07158047A
Authority
JP
Japan
Prior art keywords
soil
improving material
parts
weight
soil improving
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.)
Pending
Application number
JP32921993A
Other languages
Japanese (ja)
Inventor
Kenichi Takiguchi
健一 滝口
Masaharu Katsumata
正治 勝又
Masazumi Sugai
正澄 菅井
Hideki Shimizu
英樹 清水
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.)
Maeda Corp
Original Assignee
Maeda Corp
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 Maeda Corp filed Critical Maeda Corp
Priority to JP32921993A priority Critical patent/JPH07158047A/en
Publication of JPH07158047A publication Critical patent/JPH07158047A/en
Pending legal-status Critical Current

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Landscapes

  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Road Paving Structures (AREA)

Abstract

PURPOSE:To use high moisture soil effectively without disposing of it as industrial waste and reduce the construction cost for banking by adding a solidifier to the high moisture content soil sampled from a construction site and using it for construction of the banking. CONSTITUTION:A solidifier is added to the high moisture content soil sampled from a construction site. The soil is charged into a dehydrator and vacuum- sucked to obtain a high moisture soil improving material. In this case, it is dehydrated until moisture becomes 20 to 150 parts by weight and solidifier becomes 0.1 to 30 parts by weight against + or -100 parts by weight. Then a platy high moisture soil improvement material obtained is scattered and crushed into small lumps. In addition, the solidifier is hardened to adjust it to a desired strength. The adjusted high moisture soil improving material is charged, for example, into the inside or outside a structure 31 such as foundation, etc., or the high moisture soil improving material is rolled to form a road bed and banking of steep gradient.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、建設現場から採取され
る高含水土を有効利用するべく改良した高含水土改良材
料と、これを用いた道路路盤の構築方法、盛土の構築方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-moisture content soil improving material which is improved to effectively utilize high-moisture content soil collected from a construction site, road roadbed construction method and embankment construction method using the same.

【０００２】[0002]

【従来の技術】近年、泥水シールド工法や場所打ち杭工
法等の採用に伴い、使用される泥水、すなわち高含水土
が建設現場から大量に発生している。また、これら工法
を用いない場合にも、例えば軟弱地盤での各種建設にお
いては、掘削された土に多くの水分が含まれており、結
果とし大量の高含水土が発生している。このような高含
水土は、通常脱水処理された後、産業廃棄物として処理
されている。2. Description of the Related Art In recent years, with the adoption of the mud shield construction method, the cast-in-place pile construction method and the like, a large amount of mud, that is, high water content soil, has been generated from construction sites. Even when these construction methods are not used, excavated soil contains a large amount of water, for example, in various constructions on soft ground, and as a result, a large amount of highly hydrous soil is generated. Such high hydrous soil is usually treated as industrial waste after being dehydrated.

【０００３】[0003]

【発明が解決しようとする課題】ところが、このような
高含水土の発生は年々増加する傾向にあり、したがって
その処理に要する費用や処分地の不足が大きな社会問題
となっている。また、従来盛土を構築するための土質材
料として種々のものが提供されているが、これらは一般
に材料自体の強度が小さく、したがって転圧方法の工夫
や補強材の併用が必要となり、コストアップを招いたり
作業が煩雑になるといった問題があった。However, the generation of such high hydrous soil tends to increase year by year, and therefore the cost required for the treatment and the shortage of the disposal site are major social problems. Although various materials have been conventionally provided as soil materials for constructing embankments, the strength of the materials themselves is generally small, and therefore, it is necessary to devise a compaction method and to use a reinforcing material in combination, which increases costs. There were problems such as inviting people and making the work complicated.

【０００４】本発明は前記事情に鑑みてなされたもの
で、建設現場から発生する高含水土の有効利用を図ると
ともに、盛土の構築等を容易にすることを目的としてい
る。The present invention has been made in view of the above circumstances, and it is an object of the present invention to effectively utilize high-moisture content soil generated from a construction site and to facilitate the construction of embankments.

【０００５】[0005]

【課題を解決するための手段】本発明における請求項１
記載の高含水土改良材料では、建設現場から採取される
高含水土を、必要に応じて固化剤を添加した後、所要間
隙を保持して相対する濾過板とその間隙周囲の枠体とに
よって囲まれる充填空間に加圧充填し、この加圧充填を
継続しながら前記充填空間の外側から濾過板を介して真
空吸引することによって得られた、土１００重量部に対
し水分を２０〜１５０重量部含み、かつ土１００重量部
に対し固化剤を０.１〜３０重量部含んでなることを前
記課題の解決手段とした。請求項２記載の高含水土改良
材料では、前記請求項１記載の高含水土改良材料を所望
径に小割り、さらに強度発現させて要求される強度に調
整してなることを前記課題の解決手段とした。[Means for Solving the Problems] Claim 1 in the present invention
In the high hydrated soil improving material described, the high hydrated soil collected from the construction site is added with a solidifying agent if necessary, and then the required gap is maintained by the opposing filter plates and the frame surrounding the gap. 20 to 150 parts by weight of water with respect to 100 parts by weight of soil obtained by pressurizing and filling the enclosed filling space and vacuum-sucking from the outside of the filling space through a filter plate while continuing the pressure and filling. It was made to contain 0.1 part by weight of the solidifying agent with respect to 100 parts by weight of the soil and 100% by weight of the soil. In the highly hydrous soil-improving material according to claim 2, the highly hydrous soil-improving material according to claim 1 is subdivided into desired diameters, and the strength is further adjusted to obtain a required strength. The means.

【０００６】請求項３記載の道路路盤の構築方法では、
前記請求項１又は２記載の高含水土改良材料を撒き出
し、さらにこれを転圧することを前記課題の解決手段と
した。請求項４記載の盛土の構築方法では、前記請求項
１又は２記載の高含水土改良材料を撒き出し、さらにこ
れを転圧することを前記課題の解決手段とした。請求項
５記載の配盛土の構築方法では、前記請求項１又は２記
載の高含水土改良材料を用い、被構築箇所にジオテキス
タイルを敷設してその上に該高含水土改良材料を撒き出
して転圧し、次にこの転圧面に排水材を敷設し、次いで
該排水材の上に前記高含水土改良材料を撒き出して転圧
し、さらにこの転圧面の上にジオテキスタイルを敷設し
た後、前記工程を順次繰り返すことを前記課題の解決手
段とした。According to the road roadbed construction method of claim 3,
The high water content soil improving material according to claim 1 or 2 was sprinkled out, and the material was further compacted as a means for solving the problems. In the method for constructing an embankment according to claim 4, the high water content soil improving material according to claim 1 or 2 is sprinkled out, and the compacted material is further compacted. In the method for constructing the embankment according to claim 5, the high hydrous soil improving material according to claim 1 or 2 is used, a geotextile is laid on a construction site, and the high hydrous soil improving material is sprinkled on the geotextile. Rolling, then laying a drainage material on this rolling surface, then sprinkling the high water content soil improving material on the draining material and rolling it, and further laying a geotextile on this rolling surface, the above-mentioned step The above is sequentially repeated as the means for solving the above problems.

【０００７】[0007]

【作用】本発明における請求項１記載の高含水土改良材
料によれば、建設現場から採取される高含水土を、必要
に応じて固化剤を添加した後、所要間隙を保持して相対
する濾過板とその間隙周囲の枠体とによって囲まれる充
填空間に加圧充填し、この加圧充填を継続しながら前記
充填空間の外側から濾過板を介して真空吸引することに
よって得られた、土１００重量部に対し水分を２０〜１
５０重量部含み、かつ土１００重量部に対し固化剤を
０.１〜３０重量部含んでなるものであるから、固化剤
が含まれることによって強度発現性を有する土質材料と
なり、したがって従来産業廃棄物として処理される高含
水土が産業上有効なものとなる。請求項２記載の高含水
土改良材料によれば、前記請求項１記載の高含水土改良
材料を所望径に小割り、さらに強度発現させて要求され
る強度に調整されたものであるから、要求強度に調整さ
れたことにより例えば排水効果を必要とする裏込め材あ
るいは埋戻し材、さらには河川堤防用の材料あるいは宅
地造成用の材料として好適な材料となる。According to the highly hydrated soil improving material according to the first aspect of the present invention, the highly hydrated soil collected from the construction site is faced with a required gap after adding a solidifying agent if necessary. Soil obtained by pressure-filling the filling space surrounded by the filter plate and the frame surrounding the gap and vacuum suction from the outside of the filling space through the filter plate while continuing this pressure-filling. 20 to 1 for 100 parts by weight of water
Since it contains 50 parts by weight and 0.1 to 30 parts by weight of the solidifying agent with respect to 100 parts by weight of soil, it becomes a soil material having strength manifesting property by containing the solidifying agent, and thus is conventionally used as industrial waste. Highly hydrated soil treated as waste becomes industrially effective. According to the highly hydrated soil improving material of claim 2, the highly hydrated soil improving material of claim 1 is subdivided into desired diameters, and the strength is adjusted to a required strength by further developing the strength. By adjusting to the required strength, it becomes a material suitable as, for example, a backfilling material or a backfilling material that requires a drainage effect, a material for a river embankment, or a material for building a residential land.

【０００８】請求項３記載の道路路盤の構築方法によれ
ば、前記請求項１又は２記載の高含水土改良材料を撒き
出し、さらにこれを転圧するので、転圧時高含水土改良
材料を破砕しながら締め固めることができ、高密度の道
路路盤の構築が可能になる。請求項４記載の盛土の構築
方法によれば、前記請求項１又は２記載の高含水土改良
材料を撒き出し、さらにこれを転圧するので、前記道路
路盤構築方法と同様に転圧時、高含水土改良材料を破砕
しながら締め固めることができ、高密度で安定した盛土
の構築が可能になる。請求項５記載の盛土の構築方法に
よれば、前記請求項１又は２記載の高含水土改良材料を
用い、被構築箇所にジオテキスタイルを敷設してその上
に該高含水土改良材料を撒き出して転圧し、次にこの転
圧面に排水材を敷設し、次いで該排水材の上に前記高含
水土改良材料を撒き出して転圧し、さらにこの転圧面の
上にジオテキスタイルを敷設した後、前記工程を順次繰
り返すものであるから、ジオテキスタイルによって各層
間の固定がなされ、かつ排水材によって構築される盛土
中の排水路が確保されることにより、例えば急勾配の盛
土や、勾配は緩やかでも高く形成される盛土の構築が可
能になる。According to the road roadbed construction method of claim 3, the high hydrous soil improving material according to claim 1 or 2 is sprinkled out and further compacted, so that the high hydrous soil improving material during compaction is obtained. It can be compacted while crushing, which enables the construction of a high-density roadbed. According to the embankment construction method of claim 4, since the high water content soil improving material of claim 1 or 2 is sprinkled and further compacted, when the compaction is performed at the same time as the road subbase construction method, The water-containing soil improving material can be compacted while being crushed, and a high-density and stable embankment can be constructed. According to the method for constructing embankment according to claim 5, a geotextile is laid on a site to be constructed by using the high water content soil improving material according to claim 1 or 2, and the high water content soil improving material is sprinkled on the geotextile. Then, the drainage material is laid on this rolling surface, then the high water content soil improving material is sprinkled on the drainage material and rolled, and the geotextile is laid on the rolling surface, Since the process is repeated in sequence, each layer is fixed by geotextile and the drainage channel in the embankment constructed by the drainage material is secured, so that, for example, a steep embankment or a gentle but high slope is formed. It will be possible to build the embankment.

【０００９】以下、本発明を詳しく説明する。請求項１
記載の高含水土改良材料を得るには、まず、原料として
建設現場から採取される高含水土を用意する。このよう
な高含水土としては、高層建設物の構築の際、あるいは
地下構築物やトンネルなどの構築の際に採取されるもの
が用いられる。なお、このようにして採取される高含水
土は、従来産業廃棄物として廃棄処理されていたのは前
述した通りである。また、このような高含水土における
含水比としては、一般に土粒子分１００重量部に対して
水分が数十〜数千重量部程度である。また、特にセメン
ト等の固化剤を加えて地盤改良した工法を用いてなる建
設現場では、採取された高含水土に当然固化剤が含まれ
ている。The present invention will be described in detail below. Claim 1
In order to obtain the described highly hydrous soil improving material, first, highly hydrous soil collected from a construction site as a raw material is prepared. As such a high hydrated soil, one collected at the time of construction of a high-rise building or construction of an underground structure or a tunnel is used. As described above, the high-moisture content soil thus collected was conventionally disposed of as industrial waste. In addition, as a water content ratio in such a high hydrous soil, generally, the water content is about several tens to several thousands parts by weight with respect to 100 parts by weight of the soil particles. Further, in particular, at a construction site using a construction method in which the ground is improved by adding a solidifying agent such as cement, the collected high water content soil naturally contains the solidifying agent.

【００１０】そして、本発明の高含水土改良材料の原料
となる高含水土としては、その水分が５０〜１０００重
量部程度であるものが好ましく、さらには１００〜３０
０重量部であるものが望ましい。なぜなら、水分が５０
重量部未満である場合には、直接固化剤を添加するだけ
で十分な強度発現が得られることから、特に脱水する必
要がなくなるからであり、１０００重量部を越えると固
化剤による凝集作用が低くなって後の脱水工程に大きな
負荷がかかり、処理時間が長くなってしまうことなどに
よってコスト的に不利になってしまうからである。ま
た、１００〜３００重量部の範囲が望ましいのは、脱水
工程に大きな負荷がかけることなく処理を円滑に行うこ
とができるからである。The high-moisture content soil used as a raw material for the high-moisture content soil improvement material of the present invention preferably has a water content of about 50 to 1,000 parts by weight, and more preferably 100 to 30 parts.
It is preferably 0 parts by weight. Because the water content is 50
When the amount is less than 100 parts by weight, sufficient strength can be obtained only by adding the solidifying agent directly, and it is not necessary to dehydrate in particular. This is because a heavy load is applied to the subsequent dehydration step and the processing time becomes long, which is disadvantageous in terms of cost. Further, the range of 100 to 300 parts by weight is desirable because the treatment can be smoothly carried out without imposing a heavy load on the dehydration step.

【００１１】なお、採取された高含水土の水分が５０重
量部未満である場合に、これに水を添加して５０重量部
以上に含水比を調整し、また高含水土の水分が１０００
重量部を越える場合に、これを脱水処理して１０００重
量部以下に含水比を調整して用いることも可能である
が、このように含水比調整を行うのではその処理に手間
を要してしまうため好ましくない。When the water content of the high water content soil is less than 50 parts by weight, water is added to the water content to adjust the water content ratio to 50 parts by weight or more.
When the water content exceeds 100 parts by weight, it can be dehydrated and used by adjusting the water content to 1000 parts by weight or less. However, if the water content is adjusted in this way, it takes time and labor for the treatment. It is not preferable because it will happen.

【００１２】次に、採取された高含水土に必要に応じて
適宜量固化剤を添加する。ここで、必要に応じてとは、
前述したように高含水土中に固化剤が含有されている場
合で、特にその量が得られた高含水土改良材料の所望す
る性状（強度）を得るうえで十分な量である場合には固
化剤を添加しないことを意味している。また、前記適宜
量として具体的には、原料である高含水土に固化剤が添
加されているいないにかかわらず、後述するように脱水
後得られる改良材料中に土１００重量部に対して０.１
〜３０重量部の割合で含まれるような量を意味してい
る。ここで、最終的に得られる改良材料中における固化
剤の量を０.１〜３０重量部としたのは、０.１重量部未
満では固化剤の効果が薄く得られる高含水土改良材料が
十分に強度発現をせず、一方３０重量部を越えると、得
られる高含水土改良材料の強度が高くなりすぎるととも
のにその強度発現も早くなり過ぎてしまい、実際の使用
に支障を来たすおそれがあるからである。なお、固化剤
としては普通ポルトランドセメント等のセメントが好適
に用いられる。Next, an appropriate amount of a solidifying agent is added to the collected high water content soil as needed. Here, if necessary,
As described above, when the solidifying agent is contained in the highly hydrous soil, particularly when the amount is sufficient to obtain the desired properties (strength) of the obtained highly hydrous soil improving material, This means that no solidifying agent is added. Further, as the appropriate amount, specifically, regardless of whether or not a solidifying agent is added to the high-moisture-content soil as a raw material, as described below, 0 is added to 100 parts by weight of soil in the improved material obtained after dehydration. .1
It means that the amount is contained in the ratio of 30 parts by weight. Here, the amount of the solidifying agent in the finally obtained improving material is 0.1 to 30 parts by weight, because the amount of the solidifying agent is less than 0.1 parts by weight, the effect of the solidifying agent is small On the other hand, if the strength is not sufficiently expressed, and if it exceeds 30 parts by weight, the strength of the resulting high hydrous soil-improving material becomes too high, but at the same time the strength becomes too fast, which hinders actual use. This is because there is a risk. Incidentally, as the solidifying agent, ordinary cement such as Portland cement is preferably used.

【００１３】次いで、高含水土に必要に応じて固化剤が
添加されたもの（高含水土材料Ｓ）を攪拌混合して均一
にした後、これを、所要間隙を保持して相対する濾過板
とその間隙周囲の枠体とによって囲まれる充填空間に加
圧充填し、この加圧充填を継続しながら前記充填空間の
外側から濾過板を介して真空吸引することによって脱水
する。このような脱水を行うには、例えば本出願人が先
に提案した汚泥等の脱水装置（特願平４−２０９７３０
号）が好適に用いられる。以下、この装置の具体例につ
いて説明する。Next, a highly hydrous soil to which a solidifying agent has been added as needed (highly hydrous soil material S) is stirred and mixed to make it uniform, and then this is placed with a required gap kept between the opposing filtration plates. The filling space surrounded by the frame around the gap is pressurized and filled, and while continuing the pressure filling, vacuum suction is performed from the outside of the filling space through the filter plate to dehydrate. In order to perform such dehydration, for example, a dehydrator for sludge or the like previously proposed by the present applicant (Japanese Patent Application No. 4-209730).
No.) is preferably used. Hereinafter, a specific example of this device will be described.

【００１４】この脱水装置は、図１及び図２に示すよう
に基盤１に加圧台２及び受台３が所定間隔で相対して設
置され、この加圧台２と受台３の側面間にはガイドレー
ル４が水平に取付けられており、このガイドレール４上
に複数の脱水板５ａ、５ｂ、５ｃがその両側に設けたフ
ック状の吊子６を係合してスライド自在に支持されてい
る。As shown in FIGS. 1 and 2, in this dehydrator, a pressurizing base 2 and a receiving base 3 are installed on a base 1 so as to face each other at a predetermined interval, and between the side surfaces of the pressing base 2 and the receiving base 3. A guide rail 4 is horizontally mounted on the guide rail 4, and a plurality of dehydrating plates 5a, 5b, 5c are slidably supported on the guide rail 4 by engaging hook-shaped suspensions 6 provided on both sides thereof. ing.

【００１５】この脱水板は先端脱水板５ａと後端脱水板
５ｃとの間に２枚以上の中間脱水板５ｂを重ねて配置し
たもので、脱水工程に際して加圧台２に設けた油圧シリ
ンダ７の伸長作動により、そのロッド先端に取付けた加
圧板８により押圧されてこれと受台３との間に互いに圧
着保持されるようになっている。This dewatering plate is one in which two or more intermediate dewatering plates 5b are superposed between a front dewatering plate 5a and a rear dewatering plate 5c, and a hydraulic cylinder 7 provided on the pressurizing table 2 in the dewatering process. By the extension operation of (1), the pressure plate 8 attached to the tip of the rod presses it, and the pressure plate 8 and the pedestal 3 are pressed and held to each other.

【００１６】中間脱水板５ｂは図５及び図６に示すよう
に、芯板９の前後面にパンチングメタル等のやや目の粗
い多孔板１０と目の細かい網板１０′等からなる濾過板
を取付け、さらに前後面の周囲に厚みのある方形枠状の
間隙保持枠１１を取付けた中空板体で、その上端部には
前後面間を貫通した注入孔１２が設けられ、また下端部
の左右には前後面間を貫通した吸引孔１３が設けられて
いる。As shown in FIGS. 5 and 6, the intermediate dewatering plate 5b has a filter plate composed of a perforated plate 10 having a slightly coarse mesh such as punching metal and a mesh plate 10 'having a fine mesh on the front and rear surfaces of the core plate 9. The hollow plate body is attached with a thick rectangular frame-shaped gap holding frame 11 around the front and rear surfaces, and an injection hole 12 penetrating between the front and rear surfaces is provided at the upper end of the hollow plate body. Is provided with a suction hole 13 penetrating between the front and rear surfaces.

【００１７】なお、濾過板として金網１０を使用するこ
とにより、従来脱水板の濾過材として専ら用いられてい
る濾布に比べて目詰まりし難く、微粒子であるセメント
を含む高含水土材料Ｓの濾過に好適であり、また使用後
洗浄することにより繰り返し使用でき、耐久性において
も優れている。By using the wire mesh 10 as the filter plate, it is less likely to be clogged as compared with the filter cloth conventionally used exclusively as the filter material for the dehydration plate, and the high water content soil material S containing the cement as fine particles is used. It is suitable for filtration, and can be used repeatedly by washing after use and has excellent durability.

【００１８】芯板９は、その前後面の周縁部に僅少高さ
の縁枠１４が設けられ、この縁枠の内側の段差凹面１５
にこの縁枠１４とほぼ同高さの突起１６が多数突設され
ている。この突起１６は、多孔板１０と網板１０′等の
濾過板を部分的に支持してこれと段差凹面１５との間に
吸引空間を形成するためのもので、この突起１６を段差
凹面１５に僅少間隔で直列状に多数連設した突起列を複
数列縦横又は斜めに互いに交差するように設け、この交
差する突起列によって四周を囲まれた方形又は菱形の複
数の小空間を形成するように配列構成することによっ
て、この小空間周囲の突起列によって濾過板を安定的に
支持しながら濾過板と段差凹面１５との間の吸引空間全
体に空気あるいは水を円滑に流通させることができる。The core plate 9 is provided with an edge frame 14 having a small height at the peripheral portions of the front and rear surfaces thereof, and a stepped concave surface 15 inside the edge frame.
A large number of projections 16 are formed so as to have substantially the same height as the edge frame 14. The projection 16 is for partially supporting the filter plate such as the perforated plate 10 and the mesh plate 10 ′ to form a suction space between the filter plate and the stepped concave surface 15. A plurality of rows of protrusions arranged in series at small intervals so as to intersect each other vertically or horizontally or diagonally, and form a plurality of small square or diamond-shaped spaces surrounded by four rows by these intersecting rows of protrusions. With this arrangement, it is possible to allow air or water to smoothly flow through the entire suction space between the filter plate and the step concave surface 15 while stably supporting the filter plate by the row of protrusions around the small space.

【００１９】突起１６は芯板９の成形と同時に一体に形
成してもよいが、芯板９の成形後にその段差凹面１５に
合成樹脂等の金網状のシートを添接し、この網を形成す
る線材の交差部を若干盛り上げて突起１６として構成す
ることができる。間隙保持枠１１の注入孔１２は、間隙
保持枠１１の上端部の一部を内側又は外側に半円状等に
張り出した周辺部１１ａに設けられ、この周辺部１１ａ
には注入孔１２の内周縁から間隙保持枠１１の内側の空
間部に面する端縁にかけて導入溝１７が形成されてい
る。The protrusion 16 may be integrally formed at the same time as the molding of the core plate 9, but after the core plate 9 is molded, a wire mesh sheet of synthetic resin or the like is attached to the step concave surface 15 to form this mesh. The protrusions 16 can be formed by slightly raising the intersecting portions of the wire rods. The injection hole 12 of the gap holding frame 11 is provided in a peripheral portion 11a in which a part of the upper end portion of the gap holding frame 11 projects inward or outward in a semicircular shape.
An introducing groove 17 is formed on the inner peripheral edge of the injection hole 12 to the end edge facing the space inside the gap holding frame 11.

【００２０】間隙保持枠１１の吸引孔１３は、その下端
部の左右の隅角部に設けられ、かつ芯板板９の吸引孔１
３は段差凹面１５の下端部の左右の隅角部に設けられて
いるため、吸引孔１３は脱水板５ｂの前後面間において
濾過板１０と段差凹面１５との吸引空間に一部開放され
ている。The suction holes 13 of the gap holding frame 11 are provided at the left and right corners of the lower end of the gap holding frame 11, and the suction holes 1 of the core plate 9 are provided.
Since 3 is provided at the left and right corners of the lower end of the step concave surface 15, the suction hole 13 is partially opened in the suction space between the filter plate 10 and the step concave surface 15 between the front and rear surfaces of the dehydration plate 5b. There is.

【００２１】なお、注入孔１２は芯板９の段差凹面１５
の中央部に突設した縁枠１４とほぼ同高さの円形、四角
形等の台板部に形成し、この注入孔１２の周囲に間隙保
持枠１１と同高さの中央に注入孔１２を形成した環状の
周辺部を取付け、この周辺部の表面に注入孔１２の内周
縁から間隙保持枠１１の内側の空間部に面する周縁にか
けて導入溝１７を形成し、さらに濾過板１０、１０′に
は同位置に注入孔１２を設けてその周辺部を芯板９の上
記円形台板部と上記周辺部に挾着するようにしてもよ
い。The injection hole 12 is formed by the stepped concave surface 15 of the core plate 9.
It is formed on a base plate portion such as a circle or a quadrangle having substantially the same height as the edge frame 14 projecting at the center of the injection hole 12, and the injection hole 12 is formed around the injection hole 12 at the center of the clearance holding frame 11. The formed annular peripheral portion is attached, and an introduction groove 17 is formed on the surface of the peripheral portion from the inner peripheral edge of the injection hole 12 to the peripheral edge facing the space inside the gap holding frame 11, and further the filter plates 10, 10 '. The injection hole 12 may be provided at the same position, and the peripheral portion thereof may be sandwiched between the circular base plate portion of the core plate 9 and the peripheral portion.

【００２２】上記のように中間脱水板５ｂは芯板９の両
面に縁枠１４、段差凹面１５及び突起１６を設け、両面
に濾過板及び間隙保持枠１１を取付けたのに対して、先
端脱水板５ａ及び後端脱水板５ｃは図７に示すように、
芯板９′の片面に縁枠１４、段差凹面１５及び突起１６
を設け、この片面に多孔板１０と網板１０′等からなる
濾過板及び間隙保持枠１１を取付けた点で異り、また先
端脱水板５ａには注入孔１２及び吸引孔１３が中間脱水
板５ｂと同様に同位置に設けられているが、後端脱水板
５ｃの芯板９′には注入孔１２及び吸引１３は設けなく
てよい（設けた場合でも加圧板８によって密閉すればよ
い）。As described above, the intermediate dewatering plate 5b is provided with the edge frame 14, the step concave surface 15 and the protrusion 16 on both surfaces of the core plate 9, and the filter plate and the gap holding frame 11 are attached to both surfaces thereof, while the tip dewatering is performed. The plate 5a and the rear end dehydration plate 5c are, as shown in FIG.
The edge frame 14, the step concave surface 15 and the protrusion 16 are provided on one surface of the core plate 9 '.
This is different in that a filter plate composed of a perforated plate 10 and a mesh plate 10 'and a gap holding frame 11 are attached to one side of this, and an injection hole 12 and a suction hole 13 are provided in the tip dehydration plate 5a. Although it is provided at the same position as 5b, the injection hole 12 and the suction 13 do not have to be provided in the core plate 9'of the rear end dehydration plate 5c (if provided, it may be sealed by the pressure plate 8). .

【００２３】すなわち、先端脱水板５ａの場合はその前
面を受台３に圧着するため、芯板９′の後面に縁枠１
４、段差凹面１５及び突起１６が設けられ、この面に多
孔板１０と網板１０′等からなる濾過板及び間隙保持枠
１１が取付けられており、また後端脱水板５ｃの場合は
その後面にああ吊板画圧着するため、芯板９の前面に縁
枠１４、段差凹面１５及び突起１６が設けられ、この面
に濾過板及び間隙保持枠１１が取付けられている。That is, in the case of the tip dehydration plate 5a, its front surface is pressed against the pedestal 3, so that the edge frame 1 is provided on the rear surface of the core plate 9 '.
4, a stepped concave surface 15 and a projection 16 are provided, and a filter plate including a porous plate 10 and a mesh plate 10 'and a gap holding frame 11 are attached to this surface, and in the case of the rear end dehydration plate 5c, its rear surface. In order to press-fit the hanging plate, the edge frame 14, the step concave surface 15 and the projection 16 are provided on the front surface of the core plate 9, and the filter plate and the gap holding frame 11 are attached to this surface.

【００２４】脱水板５ａ、５ｂ、５ｃは相隣る板体同士
を一定長さの鎖等の連結索１８で一連に連結されてお
り、これらを互いに圧着させた状態から油圧シリンダ７
の収縮作動により加圧板８を介して後端脱水板５ｃを後
退させることにより、図４に示すように相隣る脱水板５
ａ、５ｂ、５ｃ同士は連結索１８の長さ分だけ間隔を空
けて順次離隔することになる。The dewatering plates 5a, 5b and 5c are connected in series with adjacent plate members by a connecting cable 18 such as a chain having a constant length.
By retracting the trailing edge dehydration plate 5c through the pressure plate 8 by the contraction operation of the adjacent dehydration plates 5c, as shown in FIG.
The a, 5b, and 5c are sequentially spaced apart by the length of the connecting cable 18.

【００２５】先端脱水板５ａが圧接する受台３には注入
孔１２及び吸引孔１３に対応する部分に高含水土材料Ｓ
の供給口１９及び吸引口２０が設けられ、この供給口１
９には圧送ポンプにより供給管２１を介して高含水土材
料Ｓが圧送され、また吸引口２０にはバキュームポンプ
により吸引管２２を介して真空吸引されるようになって
いる。なお、芯板９の段差凹面１５の中央部には縁枠１
４と同高さの凸部を設けてこれに間隙保持枠１１とほぼ
同高さのスペーサー２３を取付け、このスペーサー２３
により多孔板１０と網板１０′を芯板９に挾着してその
中央部の膨出を抑えるようになっている。In the pedestal 3 to which the tip dewatering plate 5a is pressed, the high water content soil material S is provided at the portions corresponding to the injection hole 12 and the suction hole 13.
A supply port 19 and a suction port 20 for the
The high water content soil material S is pressure-fed to 9 by a pressure pump via a supply pipe 21, and the suction port 20 is vacuum-sucked by a vacuum pump via a suction pipe 22. The edge frame 1 is provided at the center of the stepped concave surface 15 of the core plate 9.
4, a convex portion having the same height as that of the spacer 4 is provided, and a spacer 23 having substantially the same height as the gap holding frame 11 is attached to the convex portion.
Thus, the perforated plate 10 and the mesh plate 10 'are attached to the core plate 9 to suppress the bulging of the central portion thereof.

【００２６】このような脱水装置により前記高含水土材
料Ｓを脱水するには、まず、加圧台２に設けた油圧シリ
ンダ７を伸長作動し、そのロッド先端に取付けた加圧板
８により脱水板５ａ、５ｂ、５ｃを押圧してこれと受台
３との間に互いに圧着保持する。この圧着状態におい
て、各脱水板５ａ、５ｂ、５ｃの互いに隣接する間隙保
持枠１１、１１同士が気密状に圧着し、隣接する脱水板
５ａと５ｂ、５ｂと５ｂ、５ｂと５ｃの各濾過板１０、
１０′間にそれぞれ間隙保持枠１１、１１で囲まれた高
含水土材料Ｓの充填空間が形成され、この充填空間は導
入溝１７を介して注入孔１２に連通している。In order to dehydrate the high water content soil material S with such a dewatering device, first, the hydraulic cylinder 7 provided on the pressurizing table 2 is extended, and the depressurizing plate 8 is attached to the rod tip thereof. 5a, 5b and 5c are pressed to press-hold each other between them and the pedestal 3. In this pressure-bonded state, the dewatering plates 5a, 5b, and 5c, which are adjacent to each other, hold the gap-holding frames 11, 11 in an airtight manner, and the dewatering plates 5a and 5b, 5b and 5b, 5b, and 5c are adjacent to each other. 10,
Filling spaces of the high water content soil material S surrounded by the gap holding frames 11, 11 are formed between 10 ', and the filling spaces communicate with the injection hole 12 via the introduction groove 17.

【００２７】次いで、圧送ポンプを駆動して供給管を介
して供給孔１９に高含水土材料Ｓを圧送し、これを注入
孔１２及び導入溝１７を介して各脱水板５ａ、５ｂ、５
ｃ間の各充填空間内に注入充填する。Next, the pressure feed pump is driven to feed the high water content soil material S under pressure to the feed hole 19 through the feed pipe, and the dehydrated plates 5a, 5b, 5 through the pouring hole 12 and the introduction groove 17.
Inject and fill in each filling space between c.

【００２８】注入充填完了後圧送ポンプを引き続き駆動
して加圧充填を継続しながら、吸引口２０に接続した吸
引管を介してバキュームポンプにより真空吸引すること
により、吸引孔１３を介して各脱水板５ａ、５ｂ、５ｃ
における濾過板１０と芯板９、９′の段差凹面１５との
吸引空間内の空気を真空吸引し、各脱水板５ａ、５ｂ、
５ｃ間の各充填空間に充填された高含水土材料Ｓの水分
を充填圧力と真空吸引力とにより濾過板１０、１０′を
介して水分を濾過しながら吸引脱水する。After completion of the injection and filling, while continuously driving the pressure feed pump to continue the pressure filling, vacuum suction is carried out by the vacuum pump through the suction pipe connected to the suction port 20, so that each dehydration is performed through the suction hole 13. Plates 5a, 5b, 5c
The air in the suction space between the filter plate 10 and the stepped concave surface 15 of the core plates 9 and 9'in FIG.
Moisture of the high water content soil material S filled in each filling space between 5c is sucked and dehydrated while filtering the water through the filter plates 10 and 10 'by the filling pressure and the vacuum suction force.

【００２９】一方、この脱水を行っている間に絶えず高
含水土材料Ｓの加圧充填を継続しているため、脱水によ
って高含水土材料Ｓが体積を減少してもその減少分の高
含水土材料Ｓが充填空間内に確実に補給され、高含水土
材料Ｓが常に充填空間内に圧密状に満たされて空洞を生
ずることがない。On the other hand, since the high water-containing soil material S is continuously pressure-filled during the dehydration, even if the volume of the high water-containing soil material S is reduced by the dehydration, the high content of the reduced water content S is increased. The water soil material S is surely replenished in the filling space, and the high water content soil material S does not always fill the filling space in a compacted state to form a cavity.

【００３０】このようにして高含水土材料Ｓの含水比を
基準値以下、具体的には土１００重量部に対して水分が
２０〜１５０重量部となるように低下させた後、図４に
示すように油圧シリンダ６を収縮作動することにより、
加圧板７を介して後端脱水板５ｃを後退させ、相隣る脱
水板５ａ、５ｂ、５ｃ同士を連結索１８の長さ分だけ間
隔を空けて順次離隔させ、さらに支持レール１等に取付
けたバイブレーターにより各脱水板５ａ、５ｂ、５ｃに
振動等を与え、これにより脱水処理されて得られた本発
明における請求項１記載の高含水土改良材料を下方の排
出ホッパに排出する。In this way, the water content ratio of the high water content soil material S is reduced to a value not higher than the reference value, specifically, 20 to 150 parts by weight with respect to 100 parts by weight of soil. By contracting the hydraulic cylinder 6 as shown,
The rear end dehydration plate 5c is retracted via the pressure plate 7, the adjacent dehydration plates 5a, 5b, 5c are sequentially separated by the length of the connecting rope 18, and further attached to the support rail 1 or the like. The dehydrating plates 5a, 5b, 5c are vibrated by a vibrator, and the highly hydrous soil improving material according to claim 1 of the present invention obtained by the dehydration treatment is discharged to the lower discharge hopper.

【００３１】なお、土１００重量部に対して水分が２０
〜１５０重量部となるようにしたのは、２０重量部未満
にすると改良材料自体がかなり硬いものになってしま
い、その使用が制限されてしまうからであり、一方１５
０重量部を越えていると固化剤による強度発現が不十分
になってしまうからである。また、このようにして得ら
れた高含水土改良材料には、前述したようにセメント等
の固化剤が土１００重量部に対して０.１〜３０重量部
含有されているのはもちろんである。It should be noted that the water content is 20 with respect to 100 parts by weight of soil.
The reason why the amount is set to ˜150 parts by weight is that if the amount is less than 20 parts by weight, the improved material itself becomes considerably hard and its use is restricted.
This is because if the amount exceeds 0 part by weight, the strength development by the solidifying agent becomes insufficient. In addition, it is a matter of course that the high water content soil improving material thus obtained contains 0.1 to 30 parts by weight of the solidifying agent such as cement as described above with respect to 100 parts by weight of soil. .

【００３２】このようにして得られた高含水土改良材料
は、脱水処理により厚さ２０〜５０ｍｍ程度の大きな板
状の塊とされ、さらに排出時及び移送時に衝撃等が与え
られていくつかの小さな塊とされる。そして、この請求
項１記載の高含水土改良材料を所望径に小割り、さらに
含有された固化剤の硬化により強度発現させて要求され
る強度に調整することにより、請求項２記載の高含水土
改良材料が得られる。The high water content soil-improving material thus obtained is made into a large plate-like mass having a thickness of about 20 to 50 mm by dehydration treatment, and is further impacted at the time of discharging and transferring to some extent. It is made into a small lump. Then, the high hydrous soil improving material according to claim 1 is subdivided into desired diameters, and the solidifying agent contained therein is allowed to develop strength to adjust to the required strength. A soil and soil improving material is obtained.

【００３３】小割りする際の所望する径としては、該高
含水土改良材料の用途によって異なり、例えば裏込め材
料あるいは埋戻し材料として用いたい場合にはその径が
５〜２００ｍｍ程度となるように小割りし、さらに路床
用の材料として用いたい場合には５〜５０ｍｍ程度、路
体として用いたい場合には５〜１００ｍｍ程度、河川堤
防用の材料として用いたい場合には５〜３００ｍｍ程
度、宅地造成用の材料として用いたい場合には５〜１５
０ｍｍ程度にそれぞれ小割りする。ただし、これらの径
については、それぞれの範囲においてその下限値は平均
径、上限値については最大径を意味している。これは、
前述したように脱水処理によって得られる塊が厚さ２０
〜５０ｍｍ程度の板状のものとなるため、小径に小割り
されたものについては比較的球状に近いものとなってほ
ぼ平均径として表すことが可能であるが、大径のものに
ついては板状のままの形状となるため、平均径ではその
大きさを表しにくくなるからである。The desired diameter at the time of dividing into small pieces depends on the use of the high-hydrated soil improving material. For example, when the material is used as a backfill material or backfill material, the diameter should be about 5 to 200 mm. If you want to divide it into smaller pieces and use it as a material for roadbeds, about 5 to 50 mm, if you want to use it as a road body, about 5 to 100 mm, if you want to use it as a material for river dikes, about 5 to 300 mm, 5 to 15 if you want to use it as a material for residential land development
Divide each into about 0 mm. However, for these diameters, the lower limit value means the average diameter and the upper limit value means the maximum diameter in each range. this is,
As described above, the mass obtained by the dehydration treatment has a thickness of 20.
Since it is a plate shape of about 50 mm, it can be expressed as a comparatively spherical shape when divided into small diameters and can be expressed as an approximately average diameter, but for large diameters it is a plate shape. This is because the shape is as it is, and it is difficult to represent the size with the average diameter.

【００３４】また、要求される強度についても、径の場
合と同様に該高含水土改良材料の用途によって異なり、
具体的には以下に示す表中において○印を記した最低の
値以上の一軸圧縮強度（例えば裏込め材料では１.０ｋ
ｇｆ／ｃｍ2 ）にまで発現させたものとする。The required strength also depends on the use of the high hydrous soil improving material, as in the case of the diameter.
Specifically, in the table below, uniaxial compressive strength equal to or higher than the minimum value marked with a circle (for example, 1.0k for backfill material)
gf / cm 2 ).

【表１】 [Table 1]

【００３５】このように小割りされさらに強度発現させ
られたものは、例えば図８に示すように基礎等の構造物
３１の内側あるいは外側に裏込め材（あるいは埋戻し
材）３２として充填された後、さらなる高度発現がなさ
れることにより、小割りされた各材料間の間隙が保持さ
れて排水効果が得られるものとなる。The material thus subdivided and further developed in strength is filled as a backfill material (or backfill material) 32 inside or outside a structure 31 such as a foundation as shown in FIG. After that, a further high degree of expression is achieved, so that the gap between each of the subdivided materials is maintained and the drainage effect is obtained.

【００３６】また、このような高含水土改良材料を用い
ることによって以下のような構築が可能になる。第一
に、請求項１又は２記載の高含水土改良材料を用い、こ
れの強度発現が例えばコーン指数で２〜５ｋｇｆ／ｃｍ
2のときに、図９に示すようにこれを道路路盤形成箇所
３３上に撒き出し、さらに撒き出した改良材料上をロー
ラ等によって転圧することにより、道路路盤３４を構築
することができる。このような構築方法によれば、高含
水土改良材料が低強度時に撒き出し、さらにこれを転圧
するので、転圧時、高含水土改良材料を破砕しながら締
め固めることができ、したがって得られる道路路盤を高
密度のものにすることができる。Further, by using such a high hydrous soil improving material, the following construction becomes possible. First, the high hydrous soil improving material according to claim 1 or 2 is used, and the strength development thereof is, for example, 2 to 5 kgf / cm in terms of a corn index.
At the time of 2 , the road roadbed 34 can be constructed by spreading it on the roadbed forming portion 33 as shown in FIG. 9, and rolling the improved material that has been spread by using a roller or the like. According to such a construction method, the high hydrated soil improving material is sprinkled out at the time of low strength and is further compacted, so that the high hydrated soil improving material can be compacted while being crushed during compaction, thus being obtained. The roadbed can have a high density.

【００３７】第二に、請求項１又は２記載の高含水土改
良材料を用い、これの強度発現が例えばコーン指数で５
ｋｇｆ／ｃｍ2 以上に達したとき、図１０に示すように
これを盛土の形成箇所３５上に撒き出し、さらに撒き出
した改良材料上をローラ等によって転圧することによ
り、一般盛土３６を構築することができる。このような
構築方法によれば、転圧後さらなる強度発現がなされる
ことにより、高密度で安定した一般盛土３６を得ること
ができる。Secondly, the high hydrous soil improving material according to claim 1 or 2 is used, and the strength development thereof is, for example, 5 in terms of the corn index.
When kgf / cm 2 or more is reached, as shown in FIG. 10, this is sprinkled on the embankment forming portion 35, and further, the general material 36 is constructed by rolling on the sprinkled improved material with a roller or the like. be able to. According to such a construction method, since the strength is further developed after the compaction, the high density and stable general embankment 36 can be obtained.

【００３８】第三に、まず図１１に示すように盛土の被
構築箇所３７に、樹脂繊維をネット状に形成してなるジ
オテキスタイル３８を敷設してその上に高含水土改良材
料を撒き出して転圧し、次にこの転圧面に排水材３９を
敷設し、次いで該排水材３９の上に前記高含水土改良材
料を撒き出して転圧し、さらにこの転圧面の上にジオテ
キスタイル３８を敷設した後、前記工程を順次繰り返す
ことによって急勾配の盛土４０を形成することができ
る。なお、この盛土４０には、各段毎（ジオテキスタイ
ル３８及び排水材３９をそれぞれ一層ずつ敷設して形成
された段毎）にその急勾配を形成する端部側に土嚢４１
が配設されてこれらが積み上げられている。また、排水
材３９としては、例えば不織布が好適に用いられ、この
ような排水材３９が敷設されていることにより、盛土４
０中に浸み込んだ雨水等の水分が該排水材３９を伝って
盛土４０全体に分散され、さらには盛土４０の端部側に
排出されるようにるようになっている。Thirdly, as shown in FIG. 11, first, a geotextile 38 formed of a resin fiber in a net shape is laid at a construction site 37 of the embankment, and a high hydrous soil improving material is sprinkled on the geotextile 38. After compacting, then laying drainage material 39 on this compacting surface, then spreading the high hydrous soil improving material on the draining material 39 and compacting, and further laying geotextile 38 on this compacting surface The steep embankment 40 can be formed by sequentially repeating the above steps. In this embankment 40, sandbags 41 are provided on the end side forming a steep slope for each step (each step formed by laying one layer of geotextile 38 and one layer of drainage material 39).
Are arranged and these are stacked. Further, as the drainage material 39, for example, non-woven fabric is preferably used, and by laying such drainage material 39, the embankment 4
Moisture such as rainwater that has penetrated into the ground is transmitted through the drainage material 39 and dispersed throughout the embankment 40, and is further discharged to the end portion side of the embankment 40.

【００３９】したがってこのような構築方法によれば、
各層間がジオテキスタイル３８により固定されることに
よって安定化され、さらに排水材３９によって盛土４０
中に排水路が確保され、これにより急勾配であるにもか
かわらず十分に安定した盛土４０を得ることができる。
なお、ここで述べたジオテキスタイル３８を用いる盛土
の構築方法については、急勾配の盛土の構築にのみ適用
されることなく、例えば緩やかな勾配の盛土であっても
盛土自体が高くなる場合などに適用できるのはもちろん
である。Therefore, according to such a construction method,
The layers are stabilized by being fixed by the geotextile 38, and the embankment 40 by drainage material 39.
A drainage channel is secured inside, and thus a sufficiently stable embankment 40 can be obtained despite the steep slope.
The embankment construction method using the geotextile 38 described here is not applied only to the construction of a steep slope embankment, and is applied, for example, when the embankment itself becomes high even if the embankment has a gentle slope. Of course you can.

【００４０】[0040]

【実施例】泥水シールド工法に用いられた泥水（高含水
土）を用い、以下のようにして本発明の高含水土改良材
料を作製した。なお、用いた高含水土における含水比は
１８５重量％（土１００重量部に対して水分が１８５重
量部）であった。まず、固化剤として普通ポルトランド
セメントを用い、これを前記高含水土１００重量部に対
して３重量部添加し、さらに攪拌機を用いてこれを十分
に攪拌混合した。次に、図１ないし図７に示した脱水装
置を用い、混合後の固化剤添加高含水土を１０分間脱水
処理し、本発明の高含水土改良材料を得た。脱水処理後
の含水比を測定したところ、６０重量％（土１００重量
部に対して水分が６０重量部）であった。Example The muddy water (highly water-containing soil) used in the muddy water shield method was used to prepare the material for improving highly water-containing soil of the present invention as follows. The high water content soil used had a water content ratio of 185% by weight (water content was 185 parts by weight per 100 parts by weight of soil). First, ordinary Portland cement was used as a solidifying agent, 3 parts by weight of this was added to 100 parts by weight of the high hydrous soil, and this was sufficiently stirred and mixed using a stirrer. Next, using the dehydrator shown in FIG. 1 to FIG. 7, the mixed solidifying agent-added high-hydrated soil was dehydrated for 10 minutes to obtain a high-hydrated soil improving material of the present invention. When the water content ratio after the dehydration treatment was measured, it was 60% by weight (water content was 60 parts by weight with respect to 100 parts by weight of soil).

【００４１】得られた高含水土改良材料の一軸圧縮強
度、及びコーン指数の経時変化をそれぞれ測定し、得ら
れた結果を図１２、図１３に示す。図１２より、得られ
た高含水土改良材料は作製後２４時間後で約５.２ｋｇ
ｆ／ｃｍ2と十分に高い強度を発現し、さらに作製後１
週間で約８.５ｆ／ｃｍ2とさらなる強度の発現が認めら
れた。また、図１３より、得られた高含水土改良材料は
初期において時間の経過に伴いコーン指数が直線的に上
昇することが認められ、これにより初期における強度発
現の度合いの基準としてコーン指数を用いることができ
ることが確認された。The uniaxial compressive strength of the obtained high hydrous soil improving material and the change with time of the cone index were measured, and the obtained results are shown in FIGS. 12 and 13. As shown in Fig. 12, the obtained high hydrated soil improving material was about 5.2 kg after 24 hours from the production.
f / cm 2 and a sufficiently high strength were developed, and after production 1
The expression of a further strength of about 8.5 f / cm 2 was observed over a week. Further, from FIG. 13, it is recognized that in the obtained high water content soil improving material, the corn index linearly increases with the passage of time in the initial stage, and thus the corn index is used as a standard for the degree of strength development in the initial stage. It was confirmed that it was possible.

【００４２】[0042]

【発明の効果】以上説明したように本発明における請求
項１記載の高含水土改良材料は、建設現場から採取され
る高含水土を、必要に応じて固化剤を添加した後、所要
間隙を保持して相対する濾過板とその間隙周囲の枠体と
によって囲まれる充填空間に加圧充填し、この加圧充填
を継続しながら前記充填空間の外側から濾過板を介して
真空吸引することによって得られた、土１００重量部に
対し水分を２０〜１５０重量部含み、かつ土１００重量
部に対し固化剤を０.１〜３０重量部含んでなるもので
あるから、固化剤が含まれることによって強度発現性を
有する土質材料となり、したがって従来産業廃棄物とし
て処理される高含水土が産業上有効なものとして利用す
ることができ、廃棄物とした場合の処分地不足を緩和す
ることができるとともに、極めて低コストの材料となる
ことからこれを用いて構築される盛土等の施工コストを
低減することができる。As described above, the highly hydrated soil improving material according to the first aspect of the present invention has a required gap in the highly hydrated soil collected from a construction site after a solidifying agent is added if necessary. By holding under pressure and filling the filling space surrounded by the opposing filter plates and the frame surrounding the gap, by vacuum suction from the outside of the filling space through the filter plate while continuing this pressure filling. The obtained solid contains 20 to 150 parts by weight of water with respect to 100 parts by weight of the soil, and 0.1 to 30 parts by weight of the solidification agent with respect to 100 parts by weight of the soil. As a result, it becomes a soil material with strength development, and therefore the high water content soil that has been conventionally treated as industrial waste can be used as an industrially effective material, and the shortage of the disposal site in the case of waste can be mitigated. And In addition, since the material is an extremely low-cost material, it is possible to reduce the construction cost for embankments and the like constructed using this material.

【００４３】請求項２記載の高含水土改良材料は、前記
請求項１記載の高含水土改良材料を所望径に小割り、さ
らに強度発現させて要求される強度に調整されたもので
あるから、要求強度に調整されたことにより例えば排水
効果を必要とする裏込め材あるいは埋戻し材、さらには
河川堤防用の材料あるいは宅地造成用の材料として好適
な材料となり、産業上より有効なものとなる。The high hydrous soil improving material according to claim 2 is obtained by dividing the high hydrous soil improving material according to claim 1 into desired diameters and further adjusting the strength to a required strength. By adjusting the required strength, for example, it becomes a material that is suitable as a backfill material or backfill material that requires a drainage effect, and also as a material for river levees or a material for residential land development, and is more industrially effective. Become.

【００４４】請求項３記載の道路路盤の構築方法は、前
記請求項１又は２記載の高含水土改良材料を撒き出し、
さらにこれを転圧するものであるから、転圧時高含水土
改良材料を破砕しながら締め固めることができ、したが
って高密度の道路路盤を構築することができる。請求項
４記載の盛土の構築方法は、前記請求項１又は２記載の
高含水土改良材料を撒き出し、さらにこれを転圧するの
で、前記道路路盤構築方法と同様に転圧時、高含水土改
良材料を破砕しながら締め固めることができ、したがっ
て高密度で安定した盛土を構築することができる。請求
項５記載の盛土の構築方法は、前記高含水土改良材料を
用い、被構築箇所にジオテキスタイルを敷設してその上
に該高含水土改良材料を撒き出して転圧し、次にこの転
圧面に排水材を敷設し、次いで該排水材の上に前記高含
水土改良材料を撒き出して転圧し、さらにこの転圧面の
上にジオテキスタイルを敷設した後、前記工程を順次繰
り返すものであるから、ジオテキスタイルによって各層
間を固定し、かつ排水材によって構築される盛土中の排
水路を確保することができ、これによって安定した急勾
配の盛土や高い盛土などを構築することができる。According to a third aspect of the present invention, there is provided a road roadbed construction method, wherein the high water content soil improving material according to the first or second aspect is spread out.
Further, since the material is compacted, it is possible to compact the highly water-containing soil improving material during compaction while compacting, so that a high-density roadbed can be constructed. The embankment construction method according to claim 4 scatters the high water content soil improving material according to claim 1 or 2 and further compacts the material, so that when the compaction is performed, the high water content soil is formed at the time of compaction. The improved material can be crushed and compacted, thus building a dense and stable embankment. The method for constructing an embankment according to claim 5, wherein the high hydrous soil improving material is used, a geotextile is laid on a site to be constructed, and the high hydrous soil improving material is sprinkled onto the geotextile, and then the compacted surface. After laying a drainage material on, then rolling out the high water content soil improving material on the drainage material and rolling it, and further laying a geotextile on this rolling surface, since the above steps are sequentially repeated, It is possible to fix each layer by geotextile and to secure a drainage channel in the embankment constructed by drainage material, which makes it possible to construct a stable steep embankment or high embankment.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の高含水土改良材料を作製するのに好適
に用いられる脱水装置の側面図。FIG. 1 is a side view of a dehydrator suitably used for producing a highly hydrous soil improving material of the present invention.

【図２】図１に示した脱水装置の平面図。FIG. 2 is a plan view of the dehydrator shown in FIG.

【図３】図１に示した脱水装置の正面図。3 is a front view of the dehydrator shown in FIG.

【図４】図１に示した脱水装置の脱水板を隔離した状態
の側面図。FIG. 4 is a side view of the dehydrator shown in FIG. 1 in a state where a dehydration plate is isolated.

【図５】図１に示した脱水装置における、中間脱水板の
分解斜視図。5 is an exploded perspective view of an intermediate dewatering plate in the dewatering device shown in FIG.

【図６】中間脱水板の正面図。FIG. 6 is a front view of an intermediate dehydration plate.

【図７】図６のＡ−Ａ線で切断した脱水板の断面図。7 is a cross-sectional view of the dehydration plate taken along the line AA in FIG.

【図８】本発明の高含水土改良材料の使用方法を説明す
るための側断面図。FIG. 8 is a side sectional view for explaining a method of using the highly hydrous soil improving material of the present invention.

【図９】本発明の道路路盤の構築方法を説明するための
断面図。FIG. 9 is a sectional view for explaining a method for constructing a roadbed according to the present invention.

【図１０】本発明の盛土の構築方法を説明するための側
断面図。FIG. 10 is a side sectional view for explaining a method for constructing an embankment of the present invention.

【図１１】本発明における請求項５記載の盛土の構築方
法を急勾配盛土の構築方法に適用した場合の例を説明す
るための側断面図。FIG. 11 is a side sectional view for explaining an example in which the embankment building method according to claim 5 of the present invention is applied to a steep slope embankment building method.

【図１２】高含水土改良材料の作製後の時間と一軸圧縮
強度との関係を示すグラフ。FIG. 12 is a graph showing the relationship between the time after the preparation of the high hydrous soil improving material and the uniaxial compressive strength.

【図１３】高含水土改良材料の作製後の時間とコーン指
数との関係を示すグラフ。FIG. 13 is a graph showing the relationship between the time after the preparation of the high hydrous soil improving material and the cone index.

【符号の説明】[Explanation of symbols]

３２ 裏込め材（あるいは埋戻し材） ３４ 道路路盤 ３６ 一般盛土 ３８ ジオテキスタイル ３９ 排水材 ４０ 盛土 32 Backfill material (or backfill material) 34 Roadbed 36 General embankment 38 Geotextile 39 Drainage material 40 Embankment

───────────────────────────────────────────────────── フロントページの続き (72)発明者 清水 英樹 東京都千代田区富士見二丁目10番26号 前 田建設工業株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hideki Shimizu 2-10-10 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd.

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 建設現場から採取される高含水土を、必
要に応じて固化剤を添加した後、所要間隙を保持して相
対する濾過板とその間隙周囲の枠体とによって囲まれる
充填空間に加圧充填し、この加圧充填を継続しながら前
記充填空間の外側から濾過板を介して真空吸引すること
によって得られた、土１００重量部に対し水分を２０〜
１５０重量部含み、かつ土１００重量部に対し固化剤を
０.１〜３０重量部含んでなる高含水土改良材料。1. A filling space surrounded by a filter plate and a frame body around the gap which holds a required gap after adding a solidifying agent to the highly hydrous soil collected from a construction site, if necessary. 20 to 20 parts of water with respect to 100 parts by weight of soil, which was obtained by vacuum-filling into the soil and vacuum suctioning from the outside of the filling space through a filter plate while continuing this pressure-filling.
A highly hydrous soil improving material comprising 150 parts by weight and 0.1 to 30 parts by weight of a solidifying agent per 100 parts by weight of soil. 【請求項２】 請求項１記載の高含水土改良材料を所望
径に小割り、さらに強度発現させて要求される強度に調
整してなる高含水土改良材料。2. A highly hydrated soil improving material obtained by dividing the highly hydrated soil improving material according to claim 1 into desired diameters and further developing the strength to adjust the strength to a required level. 【請求項３】 請求項１又は２記載の高含水土改良材料
を撒き出し、さらにこれを転圧する道路路盤の構築方
法。3. A method for constructing a road roadbed, which comprises spreading out the highly hydrous soil-improving material according to claim 1 or 2 and further rolling it. 【請求項４】 請求項１又は２記載の高含水土改良材料
を撒き出し、さらにこれを転圧する盛土の構築方法。4. A method of constructing an embankment by spreading the high water content soil improving material according to claim 1 or 2 and further compacting the material. 【請求項５】 請求項１又は２記載の高含水土改良材料
を用い、被構築箇所にジオテキスタイルを敷設してその
上に該高含水土改良材料を撒き出して転圧し、次にこの
転圧面に排水材を敷設し、次いで該排水材の上に前記高
含水土改良材料を撒き出して転圧し、さらにこの転圧面
の上にジオテキスタイルを敷設した後、前記工程を順次
繰り返す盛土の構築方法。5. The high-hydrated soil improving material according to claim 1 is used, a geotextile is laid on a construction site, and the high-hydrated soil improving material is sprinkled on the geotextile, and then the compacted surface is pressed. A method for constructing an embankment, in which a drainage material is laid, the high water content soil improving material is sprinkled on the drainage material, the material is compacted, a geotextile is laid on the compacted surface, and then the above steps are sequentially repeated.
JP32921993A 1993-10-13 1993-12-27 High moisture content soil improving material and construction method for road bed and banking Pending JPH07158047A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32921993A JPH07158047A (en) 1993-10-13 1993-12-27 High moisture content soil improving material and construction method for road bed and banking

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP25610293 1993-10-13
JP5-256102 1993-10-13
JP32921993A JPH07158047A (en) 1993-10-13 1993-12-27 High moisture content soil improving material and construction method for road bed and banking

Publications (1)

Publication Number Publication Date
JPH07158047A true JPH07158047A (en) 1995-06-20

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040037909A (en) * 2002-10-30 2004-05-08 유근무 A Constructing Method for Preventing the Sinking of the Back Filling in the Civil Structure for using Solidify Treatment
CN102477711A (en) * 2010-11-29 2012-05-30 中冶天工集团有限公司 Muddy subgrade soil and preparation method thereof
CN102628246A (en) * 2012-03-19 2012-08-08 尚路 Road construction method adopting compound ion soil stabilizer and carbide slag
CN102864712A (en) * 2012-10-16 2013-01-09 中铁第四勘察设计院集团有限公司 Method and structure for micro-disturbance renovating of existing high speed railway subgrade deformation disease
CN103031838A (en) * 2012-12-07 2013-04-10 中铁四局集团第三建设有限公司 Bridge site deep-layer displacement method
CN103161110A (en) * 2011-12-15 2013-06-19 洛阳路世丰土壤固化科技有限公司 New construction method for waterproof, anti-crack, long-life and environment-friendly road
CN103306262A (en) * 2013-07-10 2013-09-18 上海隧道工程股份有限公司 Stirring type excavator bucket device and construction method for improving waste soil
CN103422407A (en) * 2012-05-15 2013-12-04 天津大港油田集团工程建设有限责任公司 Construction process using cement diatomite to stabilize desert sand mixture to build Niger desert road
CN103741567A (en) * 2013-12-17 2014-04-23 柳州东风化工股份有限公司 Method for curing base course and subbase of pavement by adopting soil stabilizing agent
CN104912051A (en) * 2015-05-26 2015-09-16 水利部交通运输部国家能源局南京水利科学研究院 Method for selecting construction mode in sludge solidification engineering
CN106192649A (en) * 2016-07-21 2016-12-07 桂林理工大学 A kind of construction method processing problem of bumping at bridge-head
CN106638199A (en) * 2016-12-30 2017-05-10 青岛旭域土工材料股份有限公司 Geogrid coated type road rapid construction method and application
CN108103871A (en) * 2017-12-19 2018-06-01 浙江大学城市学院 A kind of construction method of the roadbed foam concrete fill placement technique of neighbouring existing Subway Facilities
CN109629362A (en) * 2019-01-29 2019-04-16 中交航局第三工程有限公司 A kind of high liquid limit soil reinforcement roadbed filling structure and method

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040037909A (en) * 2002-10-30 2004-05-08 유근무 A Constructing Method for Preventing the Sinking of the Back Filling in the Civil Structure for using Solidify Treatment
CN102477711A (en) * 2010-11-29 2012-05-30 中冶天工集团有限公司 Muddy subgrade soil and preparation method thereof
CN103161110A (en) * 2011-12-15 2013-06-19 洛阳路世丰土壤固化科技有限公司 New construction method for waterproof, anti-crack, long-life and environment-friendly road
CN103161110B (en) * 2011-12-15 2015-12-02 洛阳路世丰土壤固化科技有限公司 The long-lived environmental protection of a kind of water-proofing anticracking is built the road new method
CN102628246A (en) * 2012-03-19 2012-08-08 尚路 Road construction method adopting compound ion soil stabilizer and carbide slag
CN103422407A (en) * 2012-05-15 2013-12-04 天津大港油田集团工程建设有限责任公司 Construction process using cement diatomite to stabilize desert sand mixture to build Niger desert road
CN102864712B (en) * 2012-10-16 2014-11-26 中铁第四勘察设计院集团有限公司 Method and structure for micro-disturbance renovating of existing high speed railway subgrade deformation disease
CN102864712A (en) * 2012-10-16 2013-01-09 中铁第四勘察设计院集团有限公司 Method and structure for micro-disturbance renovating of existing high speed railway subgrade deformation disease
CN103031838A (en) * 2012-12-07 2013-04-10 中铁四局集团第三建设有限公司 Bridge site deep-layer displacement method
CN103031838B (en) * 2012-12-07 2014-10-08 中铁四局集团第三建设有限公司 Bridge site deep-layer displacement method
CN103306262A (en) * 2013-07-10 2013-09-18 上海隧道工程股份有限公司 Stirring type excavator bucket device and construction method for improving waste soil
CN103741567A (en) * 2013-12-17 2014-04-23 柳州东风化工股份有限公司 Method for curing base course and subbase of pavement by adopting soil stabilizing agent
CN104912051A (en) * 2015-05-26 2015-09-16 水利部交通运输部国家能源局南京水利科学研究院 Method for selecting construction mode in sludge solidification engineering
CN106192649A (en) * 2016-07-21 2016-12-07 桂林理工大学 A kind of construction method processing problem of bumping at bridge-head
CN106638199A (en) * 2016-12-30 2017-05-10 青岛旭域土工材料股份有限公司 Geogrid coated type road rapid construction method and application
CN108103871A (en) * 2017-12-19 2018-06-01 浙江大学城市学院 A kind of construction method of the roadbed foam concrete fill placement technique of neighbouring existing Subway Facilities
CN109629362A (en) * 2019-01-29 2019-04-16 中交航局第三工程有限公司 A kind of high liquid limit soil reinforcement roadbed filling structure and method
CN109629362B (en) * 2019-01-29 2024-01-30 中交一航局第三工程有限公司 High liquid limit soil reinforced roadbed filling structure and method

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