JP3324012B2 - How to build an artificial water-impermeable layer - Google Patents
How to build an artificial water-impermeable layerInfo
- Publication number
- JP3324012B2 JP3324012B2 JP24378093A JP24378093A JP3324012B2 JP 3324012 B2 JP3324012 B2 JP 3324012B2 JP 24378093 A JP24378093 A JP 24378093A JP 24378093 A JP24378093 A JP 24378093A JP 3324012 B2 JP3324012 B2 JP 3324012B2
- Authority
- JP
- Japan
- Prior art keywords
- permeable layer
- layer
- pipe
- water
- injection pipe
- 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
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、透水層を利用した人工
難透水層の構築方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing an artificial water-impermeable layer using a water-permeable layer.
【０００２】[0002]
【従来の技術】従来の山留工事等においては、地中の難
透水層まで山留壁を貫入させ、地下水の浸透を少なくし
て掘削を行っていた。しかし、軟透水層が適切な深さに
存在しない場合、山留壁の内側に地上より多数のボ−リ
ングを行い、そこから薬液を注入して人工難透水層を構
築していた。2. Description of the Related Art In a conventional digging work or the like, digging is performed by making a digging wall penetrate into a hardly permeable layer underground to reduce the infiltration of groundwater. However, when the soft permeable layer does not exist at an appropriate depth, a number of borings are carried out from the ground inside the retaining wall, and a chemical solution is injected therefrom to construct an artificially permeable layer.
【０００３】[0003]
【発明が解決しようとする問題点】前記した従来の人工
難透水層の構築方法には次のような問題点がある。Problems to be Solved by the Invention The above-mentioned conventional method for constructing an artificial water-impermeable layer has the following problems.
【０００４】＜イ＞ 掘削面が広くなる程、薬剤注入用
のボ−リング数が増し、作業に多大な時間とコストがか
かる。<A> As the excavated surface becomes wider, the number of drilling holes for chemical injection increases, and much time and cost are required for the operation.
【０００５】＜ロ＞ 難透水層を大深度に形成する場合
は、１本当たりのボ−リング長が長いものとなり、難透
水層の構築に多大な時間とコストがかかる。<B> When the water-impermeable layer is formed at a large depth, the boring length per one becomes long, and it takes a lot of time and cost to construct the water-impermeable layer.
【０００６】[0006]
【本発明の目的】本発明は以上の問題点を解決するため
になされたもので、その目的とするところは、迅速かつ
経済的に難透水層を構築できる、人工難透水層の構築方
法を提供することにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for constructing an artificial water-impermeable layer which can quickly and economically construct a water-impermeable layer. To provide.
【０００７】[0007]
【問題点を解決するための手段】本発明は、透水層に到
達する深さに山留壁を構築し、前記山留壁に沿って、透
水層に到達する長さの注入管を貫入すると共に、前記注
入管から離れた位置に、透水層に到達する長さの回収管
を貫入し、前記注入管より透水層へ薬液を吐出しつつ、
回収管で吸引して薬液を浸透させ、前記注入管と回収管
の位置する透水層を難透水層に形成することを特徴とす
る、人工難透水層の構築方法である。According to the present invention, a retaining wall is constructed at a depth reaching a permeable layer, and an injection pipe having a length reaching the permeable layer penetrates along the retaining wall. At the same time, at a position distant from the injection pipe, penetrate a recovery pipe of a length reaching the permeable layer, while discharging the chemical solution from the injection pipe to the permeable layer,
A method for constructing an artificial water-impermeable layer, characterized in that a suction is performed by a recovery pipe to penetrate a chemical solution, and a water-permeable layer in which the injection pipe and the recovery pipe are located is formed as a poor water-permeable layer.
【０００８】[0008]
【実施例１】以下図面を参照しながら本発明の実施例に
ついて説明する。Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings.
【０００９】＜イ＞山留壁の構築（図１） 掘削予定範囲を囲って公知の工法により山留壁１を構築
する。この場合、山留壁１の下部は、砂礫層等の透水性
に優れた透水層４に貫入させる。<A> Construction of the retaining wall (FIG. 1) The retaining wall 1 is constructed by a known method surrounding the area to be excavated. In this case, the lower part of the retaining wall 1 is made to penetrate into a permeable layer 4 having excellent water permeability such as a gravel layer.
【００１０】＜ロ＞薬液注入管の設置（図１） 山留壁１近傍の掘削予定地盤５に薬液注入管２を貫入す
る。薬液注入管２は、透水層４に達する長さを有する管
体で、その下部に薬液吐出用の吐出孔２１を有し、上部
が吐出ポンプＰ１と接続していて、タンク内の薬液６を
透水層４内で吐出できるようになっている。<B> Installation of Chemical Injection Pipe (FIG. 1) The chemical injection pipe 2 penetrates the ground 5 to be excavated near the retaining wall 1. The chemical injection pipe 2 is a tube having a length reaching the permeable layer 4 and having a discharge hole 21 for discharging a chemical liquid at a lower part thereof, and an upper part connected to the discharge pump P1 to supply the chemical liquid 6 in the tank. The liquid can be discharged in the permeable layer 4.
【００１１】＜ハ＞薬液回収管の設置（図１） 薬液回収管３を、山留壁１から離れた掘削予定地盤５に
貫入する。回収管３は、前記注入管２と同様に透水層４
に達する長さを有する管体で、その上部が吸引ポンプＰ
２と接続している。尚、前記注入管２と回収管３の貫入
作業は、並行して行っても良い。<C> Installation of chemical recovery pipe (FIG. 1) The chemical recovery pipe 3 penetrates into the ground 5 to be excavated away from the retaining wall 1. The collection pipe 3 is provided with a water permeable layer 4 like the injection pipe 2.
, And the upper part thereof is a suction pump P
2 is connected. The operation of penetrating the injection pipe 2 and the recovery pipe 3 may be performed in parallel.
【００１２】＜ニ＞人工難透水層の構築（図１、２、
３） 両ポンプＰ１，Ｐ２の運転を開始し、注入管２の先端よ
り透水層４内に薬液６を吐出させる。単に注入管２から
薬液６を吐出させるだけでは薬液６の浸透範囲に限界が
ある。 本実施例では、薬液６の吐出位置から離れた位
置に設置した回収管３で負圧吸引するので、注入管２か
ら吐出された薬液６が回収管３へ向けて透水層４内を移
動し、地下水と共に薬液６の一部を回収管３で回収す
る。その結果、注入管２と回収管３の間に位置する透水
層４が連続した人工難透水層７として形成される。尚、
透水層４までの深度が大きい場合は、ポンプを回収管３
の下端部に設けて吸引する場合もある。<D> Construction of an artificially impervious water-permeable layer (FIGS. 1, 2,
3) The operation of both pumps P1 and P2 is started, and the chemical solution 6 is discharged from the tip of the injection pipe 2 into the permeable layer 4. Simply discharging the chemical solution 6 from the injection pipe 2 limits the permeation range of the chemical solution 6. In the present embodiment, since the negative pressure is suctioned by the recovery pipe 3 provided at a position distant from the discharge position of the chemical liquid 6, the chemical liquid 6 discharged from the injection pipe 2 moves in the water-permeable layer 4 toward the recovery pipe 3. Then, a part of the chemical solution 6 is collected by the collection pipe 3 together with the groundwater. As a result, the water-permeable layer 4 located between the injection pipe 2 and the recovery pipe 3 is formed as a continuous artificial water-impermeable layer 7. still,
When the depth to the permeable layer 4 is large, the pump is
In some cases, suction may be provided at the lower end of the head.
【００１３】＜ホ＞掘削（図３） 人工難透水層７は、山留壁１の底部間を閉塞して山留壁
１の外方の地下水が山留壁１の内側に浸入するのを阻止
する。そのため地下水の浸水を防止した状態で山留壁１
内の掘削を実施できる。<E> Excavation (FIG. 3) The artificially impervious layer 7 closes the bottom of the retaining wall 1 to prevent groundwater outside the retaining wall 1 from entering the inside of the retaining wall 1. Block. As a result, the retaining wall 1
Excavation can be carried out.
【００１４】[0014]
【実施例２】山留壁を構築する際に、山留壁の構成部材
の１つである連続地中壁の鉄筋籠や鋼管矢板等に予め薬
液注入管を付設してもよい。本実施例にあっては、独立
した注入管の貫入作業が不要となるから作業の簡略化を
図ることができる。[Embodiment 2] When constructing a retaining wall, a chemical injection pipe may be attached in advance to a reinforcing steel cage, a steel pipe sheet pile or the like of a continuous underground wall, which is one of the constituent members of the retaining wall. In this embodiment, it is not necessary to penetrate an independent injection tube, so that the operation can be simplified.
【００１５】[0015]
【実施例３】薬液注入管２と薬液回収管３との設置距離
が大きい場合は、注入管２と回収管３との間に透水層４
に達する長さの補助管（図示せず）を配置し、注入管２
より吐出させた薬液６を補助管で吸引して、先ず注入管
２と補助管の間の透水層４に薬液６を浸透させる。次
に、補助管を通じて吐出させたら薬液６を回収管３で吸
引して、補助管と回収管３との間の透水層４に薬液６を
浸透させる。上記の作業を実施することにより、薬液注
入管２と薬液回収管３との設置距離が広い場合にも難透
水層が容易に構築できる。[Embodiment 3] When the installation distance between the chemical injection pipe 2 and the chemical recovery pipe 3 is large, the permeable layer 4 is placed between the injection pipe 2 and the recovery pipe 3.
An auxiliary pipe (not shown) having a length to reach
The discharged chemical solution 6 is sucked by the auxiliary pipe, and firstly the chemical liquid 6 penetrates into the permeable layer 4 between the injection pipe 2 and the auxiliary pipe. Next, when the chemical solution 6 is discharged through the auxiliary pipe, the chemical liquid 6 is sucked by the recovery pipe 3, and the chemical liquid 6 penetrates into the permeable layer 4 between the auxiliary pipe and the recovery pipe 3. By performing the above operation, a poorly permeable layer can be easily constructed even when the installation distance between the chemical injection pipe 2 and the chemical recovery pipe 3 is large.
【００１６】[0016]
【発明の効果】本発明は以上説明したようになるから次
のような効果を得ることができる。As described above, the present invention has the following effects.
【００１７】＜イ＞ 本発明の人工難透水層構築方法
は、人工難透水層を構築する際に使用されるボ−リング
が少なくなるため、難透水層の構築作業が迅速化されコ
ストも大幅に削減できる。<A> In the method for constructing an artificial water-impermeable layer according to the present invention, since the amount of boring used when constructing the artificial water-impermeable layer is reduced, the work of constructing the water-impermeable layer is quickened and the cost is greatly increased. Can be reduced.
【００１８】＜ロ＞ 本発明の人工難透水層構築方法
は、深く、広い掘削部を持つ現場での作業に於いても、
使用されるボ−リングが少ないことから、難透水層の構
築作業が迅速化されコストも大幅に削減できる。<B> The method for constructing an artificially impervious layer according to the present invention can be applied to work on site having a deep and wide excavation part.
Since less boring is used, the construction work of the impervious layer can be accelerated and the cost can be greatly reduced.
【図１】 本発明に係る人工難透水層の構築前の断面図FIG. 1 is a cross-sectional view of an artificial water-impermeable layer according to the present invention before construction.
【図２】 人工難透水層の構築時の断面図FIG. 2 is a cross-sectional view of the construction of the artificially impervious layer.
【図３】 掘削時の説明図FIG. 3 is an explanatory view at the time of excavation.
フロントページの続き (56)参考文献 特開 昭61−60919（ＪＰ，Ａ) 特開 昭49−111411（ＪＰ，Ａ) 特公 昭35−7425（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) E02D 3/12 101 E02D 19/12 E02D 31/02 Continuation of the front page (56) References JP-A-61-60919 (JP, A) JP-A-49-111411 (JP, A) JP-B-35-7425 (JP, B1) (58) Fields investigated (Int .Cl. 7 , DB name) E02D 3/12 101 E02D 19/12 E02D 31/02
Claims (1)
貫入すると共に、 前記注入管から離れた位置に、透水層に到達する長さの
回収管を貫入し、 前記注入管より透水層へ薬液を吐出しつつ、 回収管で吸引して薬液を浸透させ、 前記注入管と回収管の位置する透水層を難透水層に形成
することを特徴とする、 人工難透水層の構築方法1. A ridge wall is constructed at a depth reaching a permeable layer, and an injection pipe having a length reaching the permeable layer penetrates along the ridge wall and at a position away from the injection pipe. Into the permeable layer through the collecting pipe, and while discharging the chemical solution from the injection pipe to the permeable layer, sucking the recovery pipe to penetrate the chemical solution, Forming an artificial water-impermeable layer, wherein the layer is formed as a water-impermeable layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24378093A JP3324012B2 (en) | 1993-09-03 | 1993-09-03 | How to build an artificial water-impermeable layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24378093A JP3324012B2 (en) | 1993-09-03 | 1993-09-03 | How to build an artificial water-impermeable layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0771029A JPH0771029A (en) | 1995-03-14 |
| JP3324012B2 true JP3324012B2 (en) | 2002-09-17 |
Family
ID=17108866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24378093A Expired - Fee Related JP3324012B2 (en) | 1993-09-03 | 1993-09-03 | How to build an artificial water-impermeable layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3324012B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4749800B2 (en) * | 2004-08-23 | 2011-08-17 | 三菱マテリアル株式会社 | Formation method of underground impermeable layer |
| JP4678018B2 (en) * | 2006-10-10 | 2011-04-27 | 株式会社大北耕商事 | Ground survey device, ground survey method, and ground improvement method |
-
1993
- 1993-09-03 JP JP24378093A patent/JP3324012B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0771029A (en) | 1995-03-14 |
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