JP3493183B2 - How to return water to the ground - Google Patents
How to return water to the groundInfo
- Publication number
- JP3493183B2 JP3493183B2 JP2001054989A JP2001054989A JP3493183B2 JP 3493183 B2 JP3493183 B2 JP 3493183B2 JP 2001054989 A JP2001054989 A JP 2001054989A JP 2001054989 A JP2001054989 A JP 2001054989A JP 3493183 B2 JP3493183 B2 JP 3493183B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- water
- return
- strainer
- groundwater
- 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 - Lifetime
Links
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、地盤に水を返送す
る方法に関するものである。TECHNICAL FIELD The present invention relates to a method for returning water to the ground.
【０００２】[0002]
【従来の技術】従来から雨水や、地下工事などにより揚
水した地下水はそのまま排水路や河川等に放流していた
ので、水資源という観点から見ると揚水した水が無駄に
廃棄処分されていることになり、水資源の保全、自然環
境の保全という点で問題があった。2. Description of the Related Art Conventionally, rainwater and groundwater pumped up by underground construction etc. have been discharged to drainage channels, rivers, etc. as they are. Therefore, from the viewpoint of water resources, pumped water is wastefully disposed of. There was a problem in terms of conservation of water resources and conservation of the natural environment.
【０００３】このため、従来から雨水や、揚水した水を
地盤に返送して地下水として保全しようとする試みがな
されている。従来にあっては、水を返送しようとする地
盤に下端部に返送用ストレーナを備えた返送管を縦向き
（垂直）に埋設し、この返送管の下端部に設けた返送用
ストレーナから地盤中に水を返送するようにしている。
ところで、水を地盤に返送するに当たっては粘性土層の
ような透水係数の低い地盤に水を返送するのはきわめて
返送効率が悪く、砂層のような透水係数の高い地盤に水
を返送する必要がある。しかしながら、地盤には透水係
数の高い層、透水係数の低い層が縦方向に積層してお
り、このため、従来のように下端部に返送用ストレーナ
を備えた返送管を縦向き（垂直）に埋設しても、縦方向
に埋設した返送用ストレーナが砂層のような透水係数の
高い地盤と粘性層のような透水係数の低い地盤とにわた
って埋設されて、透水係数の低い地盤に水を返送する場
合が生じ、地盤への水の返送効率が悪いという問題があ
り、しかも、縦向きに埋設した返送用ストレーナから水
を返送するので、例え透水係数の高い地盤に水を返送す
るとしても、透水係数の高い地盤に広範囲にわたって返
送することができないという問題があった。Therefore, attempts have been made to return rainwater or pumped water to the ground to preserve it as groundwater. Conventionally, a return pipe equipped with a return strainer at the lower end is embedded vertically (vertically) in the ground where water is to be returned, and the return strainer provided at the lower end of this return pipe I try to return the water to.
By the way, when returning water to the ground, it is extremely inefficient to return the water to the ground having a low permeability such as a cohesive soil layer, and it is necessary to return the water to a ground having a high permeability such as a sand layer. is there. However, layers with high permeability and layers with low permeability are vertically laminated on the ground, so that a return pipe equipped with a return strainer at the lower end is placed vertically (vertically). Even if buried, the return strainer buried in the vertical direction is buried between the ground with high permeability such as sand layer and the ground with low permeability such as viscous layer to return water to the ground with low permeability. In this case, there is a problem that the efficiency of returning water to the ground is poor, and since water is returned from the vertical return buried strainer, even if water is returned to the ground with a high permeability coefficient, There was a problem that it could not be returned over a wide area to the ground with a high coefficient.
【０００４】また、従来にあって、地下工事などにより
揚水した地下水は地上に設置した大気開放型の水溜めタ
ンクにいったん溜め、その後、地盤に埋設した返送管を
介して上記地下工事や地盤改良を行う場所以外の場所の
地中に返送するようにしている。Conventionally, groundwater pumped up by underground construction is temporarily stored in an open-air water storage tank installed on the ground, and then the above-mentioned underground construction and ground improvement are carried out via a return pipe buried in the ground. I try to send it back to the ground in a place other than the place where I do.
【０００５】しかしながら、地下水は雨水と異なり、地
盤中の鉄分が溶解しているため、揚水された地下水が大
気開放型の水溜めタンクにおいて、大気に接触し、地下
水中に含まれる溶解鉄分が酸化して粒状となり、この溶
解鉄分が酸化して粒状となったものが返送用ケーシング
管から地中に返送される際に地盤の土粒子間に目詰まり
し、このため、スムーズに地中に水を返送できず、返送
効率が悪いという問題があった。However, unlike rainwater, groundwater has dissolved iron content in the ground, and thus pumped groundwater comes into contact with the atmosphere in an open-air storage tank, and dissolved iron content in groundwater is oxidized. Then, the molten iron is oxidized and granulated, and when it is returned to the ground from the return casing pipe, it clogs between the soil particles in the ground, so that the water is smoothly transferred to the ground. However, there was a problem that the return efficiency was poor.
【０００６】[0006]
【発明が解決しようとする課題】本発明は上記の点に鑑
みてなされたものであり、砂層のような透水係数の高い
地盤に効率よく広い範囲にわたって水を返送でき、ま
た、地下工事や地盤改良などのために揚水した地下水を
再び地盤に返送するに当たっても、砂層のような透水係
数の高い地盤に効率よく広い範囲にわたって水を返送で
きる地盤に水を返送する方法を提供することを課題とす
るものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and can efficiently return water to a ground having a high hydraulic conductivity such as a sand layer over a wide range, and can be used for underground construction or ground. Even when returning groundwater pumped up for improvement etc. to the ground again, it is an object to provide a method of returning water to the ground that can efficiently return water over a wide range to the ground with high permeability such as sand layer. To do.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
に本発明に係る地盤に水を返送する方法は、返送管１の
先端部に水を吐出する部分を長手方向にわたって備えた
略筒状をした返送用ストレーナ２を設け、この返送用ス
トレーナ２を粘性土層のような透水係数の低い地盤３ａ
２間に存在する砂層等の透水係数の高い地盤３ａ１内に
該透水係数の高い地盤３ａ１に沿って横向きに埋設し、
返送管１から横向きに埋設した返送用ストレーナ２に水
を加圧して送って横向きに埋設した返送用ストレーナ２
から粘性土層のような透水係数の低い地盤３ａ２間に存
在する透水係数の高い地盤３ａ１に水を返送することを
特徴とするものである。このような方法を採用すること
で、粘性土層のような透水係数の低い地盤３ａ２間に存
在する砂層のような透水係数の高い地盤３ａ１に広範囲
にわたって水を返送することができ、この際、水を地盤
３中に返送するのに要する加圧力も小さくてすむもので
ある。In order to solve the above-mentioned problems, the method of returning water to the ground according to the present invention is a substantially tubular shape having a portion for discharging water at the tip of the return pipe 1 in the longitudinal direction. The return strainer 2 is provided, and the return strainer 2 is used as a soil 3a having a low hydraulic conductivity such as a cohesive soil layer.
Embedded in the ground 3a1 having a high hydraulic conductivity such as a sand layer existing between the two along the ground 3a1 having a high hydraulic conductivity,
Water is sent from the return pipe 1 to the return strainer 2 which is buried sideways by sending water under pressure, and the return strainer 2 which is buried horizontally.
To the ground 3a2 with low permeability like
It is characterized in that water is returned to the existing ground 3a1 having a high hydraulic conductivity. By adopting such a method, there exists between the soil 3a2 having a low hydraulic conductivity such as a clay soil layer.
It is possible to return water over a wide range to the ground 3a1 having a high hydraulic conductivity such as the existing sand layer, and at this time, the pressing force required to return the water into the ground 3 can be small.
【０００８】また、地盤３に埋設した揚水用ケーシング
管４の内部に流入した地下水を揚水して返送管１を経て
返送管１の先端部に設けた返送用ストレーナ２から透水
係数の高い地盤３ａ１に水を返送する方法であって、揚
水用ケーシング管４の内部に流入した地下水を揚水して
返送管１の先端部に設けた横向きに埋設した返送用スト
レーナ２から透水係数の高い地盤３ａ１に地下水を加圧
して返送する一連の揚水返送路５を形成し、この一連の
揚水返送路５を大気から遮断した密閉流路として揚水用
ケーシング管４から地下水を揚水して横向きに埋設した
返送用ストレーナ２を介して透水係数の高い地盤中３ａ
１に返送するまでの間中水が大気に触れないようにする
ことが好ましい。このような方法を採用することで、地
下工事や地盤改良のために揚水した地下水をそのまま地
盤３に返送することができるものであり、しかも、一連
の揚水返送路５が大気から遮断した密閉流路となってい
るので、溶解鉄分を多く含む地下水が揚水、・返送の一
連の流れにおいて大気と接して酸化粒状物となり、返送
の際に酸化粒状物が地盤３の土粒子間に目詰まりすると
いう現象が生じないようにできるものである。[0008] Further, ground water flowing into the pumping casing pipe 4 buried in the ground 3 is pumped up, and after passing through the return pipe 1, the return strainer 2 provided at the tip of the return pipe 1 from the return strainer 2 has a high permeability 3a1. A method of returning water to a pumping device, in which groundwater that has flowed into the pump casing pipe 4 is pumped up, and the return strainer 2 installed horizontally at the tip of the return pipe 1 is transferred to the ground 3a1 having a high hydraulic conductivity. A series of pumping water return paths 5 for pressurizing and returning the groundwater are formed, and the series of pumping water return paths 5 are pumped from the casing pipe 4 for pumping as a closed flow path that is shielded from the atmosphere, and are buried sideways for return. 3a in the ground with high permeability through the strainer 2
It is preferable that the water does not come into contact with the atmosphere until it is returned to 1. By adopting such a method, it is possible to return the groundwater pumped for underground construction or ground improvement to the ground 3 as it is, and moreover, the series of pumped water return passages 5 shut off the air from the air. Since it is a route, groundwater containing a large amount of dissolved iron comes into contact with the atmosphere in the series of pumping and returning flows to form oxidized particulate matter, and when returned, the oxidized particulate matter clogs between soil particles in the ground 3. This phenomenon can be prevented.
【０００９】また、揚水用ケーシング管４を埋設して揚
水する地盤３ｂと揚水した地下水を返送する地盤３ａと
を地下仕切り６により仕切ることが好ましい。このよう
な方法を採用することで、地盤３ｂから揚水した地下水
を地盤３ａに返送しても地下仕切り６により仕切られて
地盤３ｂ側に流出することがないものである。Further, it is preferable that the ground 3b for burying the pumping casing pipe 4 for pumping the water and the ground 3a for returning the pumped groundwater are partitioned by the underground partition 6. By adopting such a method, even if the groundwater pumped from the ground 3b is returned to the ground 3a, it will not be partitioned by the underground partition 6 and flow out to the ground 3b side.
【００１０】また、地上に設けた水溜め部７に溜めた水
を返送管１から横向きに埋設した返送用ストレーナ２に
加圧して送って横向きに埋設した返送用ストレーナ２か
ら透水係数の高い地盤３ａ１に水を返送することが好ま
しい。このような方法を採用することで、雨水、生活用
水の処理水等を水溜め部７に溜め、これを砂層のような
透水係数の高い地盤３ａ１に広範囲にわたって水を返送
することができるものである。Further, the water stored in the water reservoir portion 7 provided on the ground is pressurized from the return pipe 1 to the return strainer 2 which is embedded in the lateral direction, and is sent to the ground to have a high water permeability from the return strainer 2 which is embedded in the lateral direction. Water is preferably returned to 3a1. By adopting such a method, it is possible to store rainwater, treated water for domestic use, etc. in the water storage part 7 and return the water over a wide range to the ground 3a1 having a high permeability such as a sand layer. is there.
【００１１】[0011]
【発明の実施の形態】以下、本発明を添付図面に示す実
施形態に基づいて説明する。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the embodiments shown in the accompanying drawings.
【００１２】図１には地下工事や地盤改良のために地下
水を揚水し、この揚水した地下水を再び地盤に返送する
実施形態が示してある。FIG. 1 shows an embodiment in which groundwater is pumped for underground construction or ground improvement, and the pumped groundwater is returned to the ground again.
【００１３】地下工事のために地盤を掘削したり、ある
いは特定の場所の地盤改良などを行う場所の地盤３（以
下特定の地盤３ｂという）の周囲に地下止水壁やシート
パイル等の地下仕切り６を形成して、この地下仕切り６
によって掘削したり、あるいは地盤改良を行う特定の地
盤３ｂと、この特定の地盤３ｂ以外の地盤１（以下他の
場所の地盤３ａという）とを地下において仕切り、上記
特定の地盤３ｂと別の場所の地盤３ａとの間で地下にお
いて地下水が相互に流れないように遮断するものであ
る。Underground partitions such as underground water-stop walls and sheet piles around the ground 3 (hereinafter referred to as the specific ground 3b) at a place where the ground is excavated for the underground construction or the ground is improved at a specific place. 6 to form this underground partition 6
A specific ground 3b that is excavated by or improved by the ground and a ground 1 other than the specific ground 3b (hereinafter referred to as the ground 3a in another place) are partitioned underground, and a place different from the specific ground 3b. The groundwater is shut off from the ground 3a so as not to flow with each other underground.
【００１４】このように特定の地盤３ｂの周囲に地下止
水壁やシートパイル等の地下仕切り６を形成した後、特
定の地盤３ｂを掘削したり、地盤改良を行うに当たっ
て、特定の地盤３ｂの地下水を揚水して地下水位を下
げ、揚水した地下水を別の地盤３ａに返送するものであ
る。ここで、上記のように特定の地盤３ｂの地下水を揚
水して地下水位を下げることで、掘削すべき地盤３ｂの
土砂をドライ化して掘削を容易にすると共に掘削した土
砂の処分を容易にし、また、地盤改良に当たっても地下
水位を低下させて目的とする特定の地盤３ｂの含水率を
低下させることで簡単に地盤改良が行えるものである。In this way, after the underground partition 6 such as an underground water stop wall or a sheet pile is formed around the specific ground 3b, the specific ground 3b is excavated or the ground is improved. The groundwater is pumped to lower the groundwater level, and the pumped groundwater is returned to another ground 3a. Here, as described above, by pumping the groundwater of the specific ground 3b to lower the groundwater level, the earth and sand of the ground 3b to be excavated is dried to facilitate the excavation and the disposal of the excavated earth and sand, Further, even in the case of ground improvement, the ground water level is lowered to lower the water content of the target specific ground 3b, so that the ground can be easily improved.
【００１５】しかして、上記のように特定の地盤３ｂの
地下水を揚水し、揚水した地下水を特定の地盤３ｂとは
地下止水壁やシートパイル等の地下仕切り６で仕切った
別の地盤３ａに返送するには以下のようにして行うもの
である。However, as described above, the groundwater of the specific ground 3b is pumped, and the pumped groundwater is separated from the specific ground 3b by another ground 3a which is partitioned by an underground partition 6 such as an underground stop wall or a sheet pile. To return it, follow the steps below.
【００１６】地下工事のために地盤を掘削したり、地盤
改良などを行う特定の地盤３ｂに揚水用ケーシング管４
を埋設し、特定の地盤３ｂとは地下止水壁やシートパイ
ル等の地下仕切り６で仕切った別の地盤３ａに先端部に
返送用ストレーナ２を設けた返送管１を埋設する。A casing pipe 4 for pumping water is provided on a specific ground 3b for excavating the ground or performing ground improvement for underground construction.
The return pipe 1 having a return strainer 2 at its tip is embedded in another ground 3a which is separated from the specific ground 3b by an underground partition 6 such as an underground water stop wall or a sheet pile.
【００１７】ここで、別の地盤３ａに埋設する返送管１
の先端部に設けた返送用ストレーナ２は図１に示すよう
に、略筒状をしていて長い（数メールから数十メート
ル）ものであり、この略筒状をした長い返送用ストレー
ナ２を別の地盤３ａの地層のうち砂層等の透水係数の高
い地盤３ａ１内に横向き（略水平）に埋設するものであ
る。すなわち図１に示すように粘性土層のような透水係
数の低い地盤３ａ２間に存在する砂層等の透水係数の高
い地盤３ａ１内に返送用ストレーナ２を横向き（略水
平）に埋設する。粘性土層のような透水係数の低い地盤
３ａ２間に存在する水を返送しようとする透水係数の高
い地盤３ａ１はあらかじめボーリンク等の地質調査等に
より求めたり、あるいは、縦孔を形成することで知るこ
とができるものである。Here, the return pipe 1 to be buried in another ground 3a
As shown in FIG. 1, the return strainer 2 provided at the tip of the is substantially cylindrical and long (several tens of meters to several tens of meters), and the long return strainer 2 having the substantially cylindrical shape is used. It is embedded laterally (substantially horizontally) in a ground 3a1 having a high water permeability such as a sand layer among the grounds of another ground 3a. That is, as shown in FIG. 1, a high permeability coefficient such as a sand layer existing between the soil 3a2 having a low permeability coefficient such as a cohesive soil layer.
The return strainer 2 is turned sideways into the ground 3a1 (approx.
Buried in the flat). Ground with low permeability such as cohesive soil layer
The ground 3a1 having a high hydraulic conductivity for returning the water existing between 3a2 can be obtained by a geological survey such as boring in advance, or can be known by forming a vertical hole.
【００１８】返送管１の先端部に設けた返送用ストレー
ナ２を砂層等の透水係数の高い地盤３ａ１内に横向き
（略水平）に埋設するには従来から公知の種々の方法が
採用できるが、例えば特開平１１−１９０１９０号公報
に示されたような方法により返送管１の少なくとも返送
用ストレーナ２を別の地盤３ａの地層のうち砂層等の透
水係数の高い地盤３ａ１内に横向き（略水平）に埋設す
るものである。この特開平１１−１９０１９０号公報に
示された方法は、概説すると、図４のように地盤３ａに
発進立杭４０と到達立杭４１とを形成し、掘進機４７に
より最初に斜め下方に向けて先端部にドリルヘッド４２
を備えた掘進ロッド４３を貫入して発進立杭４０に至ら
せ、発進立杭４０部分から目的とする透水係数の高い地
盤３ａ１部分においてドリルヘッド４２を横向きにして
横向きに貫入させ、ドリルヘッド４２を到達立杭４１に
至らせて横向きの小径孔４５を透水係数の高い地盤３ａ
１に形成する。ドリルヘッド４２が到達立杭４１に至る
と、ドリルヘッド４２を外し、径の大きい拡孔リーマ４
４を掘進ロッド４３の先端に取付けると共に該拡孔リー
マ４４に返送用ストレーナ２又は先端部に返送用ストレ
ーナ２を設けた返送管１を接続し、掘進機４７により掘
進ロッド４３を上記と逆に引きながら拡孔リーマ４４に
より上記小径孔４５を拡径して大径孔４６を形成すると
共に拡孔リーマ４４に接続した返送用ストレーナ２又は
先端部に返送用ストレーナ２を設けた返送管１を大径孔
４６内に通すことで透水係数の高い地盤３ａ１に返送用
ストレーナ２又は先端部に返送用ストレーナ２を設けた
返送管１を横向きに埋設するのである。Various well-known methods can be employed to laterally (substantially) embed the return strainer 2 provided at the tip of the return pipe 1 in the ground 3a1 having a high water permeability such as a sand layer. For example, at least the return strainer 2 of the return pipe 1 is laterally (substantially horizontal) in the ground 3a1 having a high hydraulic conductivity such as a sand layer among the grounds of another ground 3a by the method as disclosed in JP-A-11-190190. To be buried in. The method disclosed in Japanese Patent Application Laid-Open No. 11-190190, when outlined, forms a starting standing pile 40 and a reaching standing pile 41 on the ground 3a as shown in FIG. Drill head 42 on the tip
The drilling rod 43 having the above is penetrated to reach the starting standing pile 40, and the drill head 42 is laterally penetrated from the starting standing pile 40 portion to the ground 3a1 portion having a high water permeability. To reach the standing pile 41 and form the lateral small-diameter hole 45 into the ground 3a having a high hydraulic conductivity.
1 to form. When the drill head 42 reaches the reaching pile 41, the drill head 42 is removed and the reamer 4 having a large diameter is expanded.
4 is attached to the tip of the excavation rod 43, the return strainer 2 or the return pipe 1 provided with the return strainer 2 at the tip is connected to the hole reamer 44, and the excavation machine 47 reverses the excavation rod 43. While pulling, the expansion hole reamer 44 expands the small diameter hole 45 to form a large diameter hole 46 and the return strainer 2 connected to the expansion hole reamer 44 or the return pipe 1 provided with the return strainer 2 at the tip. By passing through the large diameter hole 46, the return strainer 2 is provided on the ground 3a1 having a high water permeability or the return pipe 1 provided with the return strainer 2 at the tip end is laterally embedded.
【００１９】もちろん、砂層のように透水係数の高い地
盤３ａ１に返送用ストレーナ２又は先端部に返送用スト
レーナ２を設けた返送管１を横向きに埋設する当たって
は、上記以外の方法を採用してもよいものである。Of course, when the return strainer 2 or the return pipe 1 provided with the return strainer 2 at the tip end is laterally embedded in the ground 3a1 having a high hydraulic conductivity such as a sand layer, a method other than the above is adopted. It's okay.
【００２０】上記のようにして砂層等の透水係数の高い
地盤３ａ１内に横向きに埋設した返送管１の先端部に設
けた返送用ストレーナ２は、長手方向の略全長にわたっ
て水を吐出する部分を備えてものであり、図２に示すよ
うに返送管１の先端部に連通接続した内筒部８と、内筒
部８の外周を隙間９を介して囲むストレーナ筒部１０と
で構成してあり、内筒部８には返送孔１１が設けてあ
る。この返送用ストレーナ２の先端部には遮蔽部が設け
てある。ストレーナ筒部１０は例えば外形が円筒状のも
のであって、その外周に所定の間隔で隙間を形成するよ
うに鋼線が巻かれたものからなり、返送管１から内筒部
８に送られた水が返送管１の返送孔１１から内筒部８と
ストレーナ筒部１０との間の隙間９に供給され、隙間９
に供給された水がストレーナ筒部１０に巻かれた鋼線間
の隙間から地盤３ａ１に返送されるようになっている。As described above, the return strainer 2 provided at the tip of the return pipe 1 laterally embedded in the ground 3a1 having a high permeability such as a sand layer has a portion for discharging water over substantially the entire length in the longitudinal direction. As shown in FIG. 2, the inner tube portion 8 is connected to the distal end portion of the return pipe 1 and is connected to the inner tube portion 8, and the strainer tube portion 10 surrounds the outer circumference of the inner tube portion 8 with a gap 9 therebetween. There is a return hole 11 in the inner cylinder portion 8. A shield is provided at the tip of the return strainer 2. The strainer cylinder portion 10 has, for example, a cylindrical outer shape, and a steel wire wound around the outer circumference thereof so as to form gaps at predetermined intervals, and is sent from the return pipe 1 to the inner cylinder portion 8. The water is supplied from the return hole 11 of the return pipe 1 to the gap 9 between the inner tubular portion 8 and the strainer tubular portion 10, and the gap 9
The water supplied to the soil 3a1 is returned to the ground 3a1 through the gap between the steel wires wound around the strainer cylinder 10.
【００２１】ここで、返送管１を埋設した地盤３ａには
返送管１の周囲を囲むように不透水層３１を形成しても
よく、このように不透水層３１を形成することで返送用
ストレーナ２から返送管１に沿って返送水が地上側に上
昇するのが防止されるものである。Here, an impermeable layer 31 may be formed on the ground 3a in which the return pipe 1 is embedded so as to surround the return pipe 1, and by forming the impermeable layer 31 in this way The return water from the strainer 2 along the return pipe 1 is prevented from rising to the ground side.
【００２２】揚水用ケーシング管４は特定の地盤３ｂに
縦方向に埋設してあり、この揚水用ケーシング管４の下
端部には上下方向に長い流入用ストレーナ１２が設けて
ある。流入用ストレーナ１２は図３に示すように揚水用
ケーシング管４の下端部に連通接続した上下方向に長い
内筒部１３と、上下方向に長い内筒部１３の外周を上下
方向に長い隙間１４を介して囲む上下方向に長いストレ
ーナ筒部１５とで構成してあり、流入用ストレーナ１２
の下端部には砂溜まり部１６が設けてある。また、砂溜
まり部１６の底には底蓋が設けてある。The pumping casing pipe 4 is vertically embedded in a specific ground 3b, and a vertical inflow strainer 12 is provided at the lower end of the pumping casing pipe 4. As shown in FIG. 3, the inflow strainer 12 includes an inner cylinder portion 13 which is vertically connected to the lower end portion of the pumping water casing pipe 4, and an inner cylinder portion 13 which is vertically long. And a strainer tube portion 15 that is long in the vertical direction and is surrounded by the inflow strainer 12
A sand trap 16 is provided at the lower end of the. A bottom lid is provided on the bottom of the sand puddle portion 16.
【００２３】上記揚水用ケーシング管４は鋼管からな
り、特定の地盤３ｂと揚水用ケーシング管４との間には
必要に応じて砂利等が充填されたフィルター層１７を設
けるように揚水用ケーシング管４を埋設してもよい。ス
トレーナ筒部１５は例えば外形が円筒状のものであっ
て、その外周に所定の間隔で隙間を形成するように鋼線
が巻かれたものからなり、該隙間から地下水を内部に流
入させることができるようになっている。揚水ケーシン
グ管４の下端部に連通接続した内筒部１３は鋼管等の非
透水性のものから出来ていて、内筒部１３の下端部に上
記ストレーナ筒部１５からから流入した地下水を内部に
取り入れるための集水孔１８が複数設けてある。The above-mentioned casing pipe 4 for pumping water is made of a steel pipe, and a casing layer for pumping water is provided between the specific ground 3b and the casing pipe 4 for pumping water so that a filter layer 17 filled with gravel or the like is provided if necessary. 4 may be embedded. The strainer cylinder portion 15 has, for example, a cylindrical outer shape, and is made of steel wire wound around the outer circumference thereof so as to form gaps at predetermined intervals, and groundwater can flow into the interior through the gaps. You can do it. The inner tubular portion 13 connected to the lower end of the pumping casing pipe 4 is made of a water impermeable material such as a steel pipe, and the ground water flowing from the strainer tubular portion 15 into the lower end of the inner tubular portion 13 is put inside. A plurality of water collecting holes 18 for taking in are provided.
【００２４】上記の構成の揚水用ケーシング管４内に地
下水が流入するに当たっては、ストレーナ筒部１５の上
下方向の全長からストレーナ筒部１５と内筒部１３との
間の隙間１４に流入し、更に隙間１４に流入した地下水
は内筒部１３の下端部の集水孔１８からのみ内筒部１３
内に流入するものであるが、この場合、地下水位が上下
方向に長いストレーナ筒部１５上端部よりも下方に位置
したとしても、集水孔１８よりも上に位置していれば、
ストレーナ筒部１５からストレーナ筒部１５と内筒部１
３との間の隙間１４に進入した空気は、内筒部１３の内
側に進入することができず、該隙間１４の上部に集まる
ことになる。このように、本実施形態においては内筒部
１３の外周を囲むストレーナ筒部１５、内筒部１３の下
端部に設けた集水孔１８、内筒部１３とストレーナ筒部
１５との間の隙間１４により地下水位の低下により揚水
用ケーシング管４内にエアが流れ込むのを防止するため
のエア流入防止手段が構成している。When the groundwater flows into the pumping casing pipe 4 having the above-mentioned structure, the groundwater flows from the entire vertical length of the strainer cylinder portion 15 into the gap 14 between the strainer cylinder portion 15 and the inner cylinder portion 13, Further, the groundwater that has flowed into the gap 14 can only come from the water collecting holes 18 at the lower end of the inner tubular portion 13
However, in this case, even if the groundwater level is located below the upper end of the strainer cylinder 15 that is long in the vertical direction, if it is located above the water collection hole 18,
From the strainer cylinder 15 to the strainer cylinder 15 and the inner cylinder 1
The air that has entered the gap 14 between the two and 3 cannot enter the inside of the inner tubular portion 13, and will collect in the upper part of the gap 14. As described above, in the present embodiment, the strainer cylinder portion 15 that surrounds the outer periphery of the inner cylinder portion 13, the water collection hole 18 provided at the lower end portion of the inner cylinder portion 13, and the space between the inner cylinder portion 13 and the strainer cylinder portion 15 are provided. The gap 14 constitutes an air inflow preventing means for preventing air from flowing into the pumping casing pipe 4 due to a decrease in groundwater level.
【００２５】内筒部１３内には水中ポンプよりなる揚水
ポンプ２０が設けてあり、揚水ポンプ２０には揚水管２
８の下端部が接続してある。揚水管２８は揚水用ケーシ
ング管４内に挿通してあり、揚水管２８の上部が揚水用
ケーシング管４の上端部開口を閉塞する上蓋２１を貫挿
して地上２４に導出してある。揚水用ケーシング管４の
上端部開口を閉塞する上蓋２１には更に減圧用管路２２
の端部が接続してあり、この減圧用管路２２は地上２４
に設置した真空ポンプのようなバキューム手段２３に接
続してある。A pumping pump 20 composed of a submersible pump is provided in the inner tubular portion 13, and the pumping pump 20 has a pumping pipe 2
The lower end of 8 is connected. The pumping pipe 28 is inserted into the pumping casing pipe 4, and the upper part of the pumping pipe 28 is inserted into the upper lid 21 that closes the upper end opening of the pumping casing pipe 4 and is led out to the ground 24. The upper lid 21 that closes the upper end opening of the pumping casing pipe 4 is further provided with a depressurizing pipe line 22.
Is connected to the end of the
It is connected to a vacuum means 23 such as a vacuum pump installed at.
【００２６】地上２４には中間加圧ポンプ２５、密閉タ
ンクよりなる大気に対して内部を流れる水が接しないよ
うに密閉された沈砂部２６が設置してある。一端部を揚
水ポンプ２０に接続した揚水管２８の他端部が中間加圧
ポンプ２５に接続してあり、中間加圧ポンプ２５と沈砂
部２６の入口とが接続管２７により接続してあり、沈砂
部２６の出口に返送管１の他端部が接続してある。そし
て、揚水ポンプ２０、揚水管２８、中間加圧ポンプ２
５、接続管２７、沈砂部２６、先端部に返送用ストレー
ナ２を設けた返送管１により一連の揚水返送路５が構成
してあり、この一連の揚水返送路５は内部を流れる水が
大気と遮断されて大気に接しないような密閉流路として
形成してある。そして、本実施形態においては揚水ポン
プ２０、中間加圧ポンプ２５により揚水用ケーシング管
４の内部に流入した地下水を揚水して返送管１を介して
加圧して地盤３中に返送するための揚水・加圧返送手段
を構成してある。On the ground 24, an intermediate pressurizing pump 25 and a sand settling part 26, which is hermetically sealed so that the water flowing inside does not come into contact with the atmosphere, are installed. The other end of the pumping pipe 28, one end of which is connected to the pumping pump 20, is connected to the intermediate pressurizing pump 25, and the intermediate pressurizing pump 25 and the inlet of the sand settling unit 26 are connected by a connecting pipe 27. The other end of the return pipe 1 is connected to the outlet of the sand settling section 26. And the pumping pump 20, the pumping pipe 28, the intermediate pressurizing pump 2
5, a connection pipe 27, a sand settling part 26, and a return pipe 1 provided with a return strainer 2 at the tip end constitute a series of pumped water return passages 5. In this series of pumped water return passages 5, the water flowing inside is atmospheric. It is formed as a closed flow path that is blocked from contact with the atmosphere. In the present embodiment, the pumping pump 20 and the intermediate pressurizing pump 25 pump the groundwater that has flowed into the pumping casing pipe 4, pressurize it via the return pipe 1 and return it to the ground 3. -A pressure return means is configured.
【００２７】しかして、特定の地盤３ｂの地下水を揚水
し、揚水した地下水を特定の地盤３ｂとは地下止水壁や
シートパイル等の地下仕切り６で仕切った別の地盤３ａ
に返送するものである。この場合、バキューム手段２３
で揚水用ケーシング管４内を減圧することで、効果的に
特定の地盤３ｂの地下水を揚水用ケーシング管４の下端
部に設けた流入用ストレーナ１２の内筒部１３内に集水
でき、この内筒部１３に集水された特定の地盤３ｂの地
下水を揚水ポンプ２０で揚水し、中間加圧ポンプ２５で
更に加圧して沈砂部２６側に送り、沈砂部２６で揚水し
た地下水中の砂のような粒状物を沈下させて分離除去し
（例えば沈砂部２６内に設けたバッフル板などに地下水
が衝突しながら流れることで、砂のような粒状物を分離
して沈下させる）、砂のような粒状物が除去された地下
水を返送管１内に加圧状態で返送するものである。返送
管１内に供給された地下水は加圧されているため、返送
管１の先端部に設けた返送用ストレーナ２から別の地盤
３ａの地層のうち砂等の透水係数の高い地盤３ａ１内に
加圧浸透していくことで返送されるものである。ここ
で、返送管１の先端部に設けた返送用ストレーナ２は水
を吐出する部分を長手方向にわたって備えたもので、こ
の水を吐出する部分を長手方向にわたって備えた返送用
ストレーナ２を砂層等の透水係数の高い地盤３ａ１内に
該透水係数の高い地盤３ａ１に沿って横向きに埋設して
あるので、横向きに埋設した水を吐出する部分を長手方
向にわたって備えた返送用ストレーナ２から加圧により
吐出した水は砂層のような透水係数の高い地盤３ａ１に
広範囲にわたって加圧浸透していくものであり、この場
合透水係数の高い地盤３ａ１にのみ水を加圧して広範囲
に返送することができるものである。Then, the groundwater of the specific ground 3b is pumped, and the pumped groundwater is separated from the specific ground 3b by the underground partition 6 such as an underground water stop wall or a sheet pile.
It will be returned to. In this case, the vacuum means 23
By decompressing the inside of the pumping casing pipe 4 with, it is possible to effectively collect the groundwater of the specific ground 3b into the inner cylindrical portion 13 of the inflow strainer 12 provided at the lower end of the pumping casing pipe 4, The groundwater of the specific ground 3b collected in the inner cylinder part 13 is pumped by the pump 20, the intermediate pressurizing pump 25 further pressurizes and sends it to the settling part 26, and the sand in the groundwater pumped by the settling part 26. The granular material such as is settled and separated (for example, the groundwater collides with a baffle plate provided in the sand settling part 26 to flow and separate the granular material such as sand to settle). The groundwater from which such particulate matter has been removed is returned to the return pipe 1 under pressure. Since the groundwater supplied into the return pipe 1 is pressurized, the ground water 3a1 having a high permeability coefficient such as sand in the stratum of another ground 3a from the return strainer 2 provided at the tip of the return pipe 1 It is returned by permeating under pressure. Here, the return strainer 2 provided at the tip of the return pipe 1 is provided with a portion for discharging water in the longitudinal direction, and the return strainer 2 provided with a portion for discharging water in the longitudinal direction is a sand layer or the like. Since it is buried laterally in the ground 3a1 having a high hydraulic conductivity along the ground 3a1 having a high hydraulic conductivity, the return strainer 2 provided with a portion for discharging the water buried in the lateral direction is provided by pressing. The discharged water is permeated under pressure into the ground 3a1 having a high permeability such as a sand layer, and in this case, the water can be returned to a wide range by pressurizing only the ground 3a1 having a high permeability. Is.
【００２８】上記特定の地盤３ｂの地下水の揚水、揚水
した地下水を別の地盤３ａに返送するという一連の揚水
・返送は一連の揚水返送路５に地下水を流して連続的に
行われるものであって、したがって、一旦地上において
大気開放型の貯水タンクに水を溜めるものに比べて、揚
水した地下水の処理時間が短いものである。しかも、上
記一連の揚水・返送に当たって、一連の揚水返送路５が
大気から遮断した密閉流路として形成してあるので、揚
水用ケーシング管４から地下水を揚水して返送管１を介
して地盤３中に返送するまでの間中水が大気に触れない
ものである。このため、地下水中に含まれる溶解鉄分が
大気に接して酸化して酸化粒状物が生成するという現象
が生じないものであり、別の地盤３ａに返送する際に酸
化粒状物により地盤３ａが目詰まりすることがなく、ス
ムーズに地下水を地中に返送できるものである。A series of pumping and returning of the groundwater on the specific ground 3b and returning the pumped groundwater to another ground 3a is carried out continuously by flowing groundwater through a series of pumping water return paths 5. Therefore, the treatment time of the pumped ground water is shorter than that of once storing the water in the open-air water storage tank on the ground. Moreover, in the above-mentioned series of pumping / returning, since the series of pumping / returning passages 5 are formed as a closed flow path that is shielded from the atmosphere, groundwater is pumped from the pumping casing pipe 4 and the ground 3 is passed through the return pipe 1. Water is not in contact with the atmosphere until it is returned. For this reason, the phenomenon that dissolved iron content contained in groundwater is exposed to the atmosphere and oxidized to generate oxidized particulate matter does not occur. It can return the groundwater smoothly to the ground without clogging.
【００２９】次に、本発明の他の実施形態につき図５に
基づいて説明する。本実施形態においては、地上に雨水
や、生活用水の処理水（工業用水の処理水も含む）等を
溜める水溜め部７を形成し、この水溜め部７に溜められ
た水を加圧ポンプ３０により返送管１から返送用ストレ
ーナ２に加圧して送って返送用ストレーナ２から透水係
数の高い地盤３ａ１に返送するようにしている。本実施
形態においては、雨水や生活用水の処理水等を透水係数
の高い地盤３ａ１に送り込んで地下水とすることにより
水資源の保全を図っている。ここで、都会のような地面
をアスファルトやコンクリートで覆ったり、あるいは図
５のように砂層のような透水係数の高い地盤３ａ１の上
層に粘性土層のように透水係数の低い地盤３ａ２などが
ある地層においては、地表面の水が透水係数の高い地盤
３ａ１に浸透して地下水として貯えられ難いものである
が、本実施形態によれば、地上の雨水や生活用水の処理
水をいったん水溜め部７に溜め、これを上記のようにし
て透水係数の高い地盤３ａ１内に透水係数の高い地盤３
ａ１に沿って横向きに埋設した返送用ストレーナ２から
該透水係数の高い地盤３ａ１の広範囲にわたって水を加
圧浸透させるので、簡単な方法で容易に地下水という形
態で水資源を保全することができるものである。Next, another embodiment of the present invention will be described with reference to FIG. In the present embodiment, a water reservoir 7 for storing rainwater, treated water for domestic use (including treated water for industrial water), etc. is formed on the ground, and the water accumulated in the water reservoir 7 is pressurized by a pump. The pressure is sent from the return pipe 1 to the return strainer 2 by 30 and is sent from the return strainer 2 to the ground 3a1 having a high water permeability. In the present embodiment, water resources are conserved by sending treated water such as rainwater or domestic water to the ground 3a1 having a high water permeability to be groundwater. Here, the ground such as the city is covered with asphalt or concrete, or the ground 3a1 having a low hydraulic conductivity such as a cohesive soil layer is provided on the ground 3a1 having a high hydraulic conductivity such as a sand layer as shown in FIG. In the stratum, it is difficult for the water on the ground surface to permeate into the ground 3a1 having a high hydraulic conductivity and be stored as groundwater. However, according to the present embodiment, treated water on the ground or domestic water is once stored in the water storage section. No. 7 is stored in the ground 3a1 having a high hydraulic conductivity as described above.
Water is pressurized and permeated over a wide area of the soil 3a1 having a high water permeability from the return strainer 2 which is buried laterally along a1, so that water resources can be easily preserved in the form of groundwater by a simple method. Is.
【００３０】ここで、前述の実施形態のような地下水を
揚水したものは地中の鉄分が多量に溶解しているため、
大気（空気）に接すると溶解鉄分が酸化して酸化粒状物
が生成して地下水返送の際に地盤を目詰まりさせるおそ
れがあるが、雨水や生活用水の処理水等は地下水に比べ
ると溶解鉄分の量が少なく、したがって、地上に形成し
た水溜め部７は大気開放型であってよいものである。Here, since the ground iron is dissolved in a large amount in the ground water pumped as in the above-mentioned embodiment,
When it comes into contact with the atmosphere (air), dissolved iron content oxidizes and oxidized particulate matter is generated, which may clog the ground when returning groundwater. However, treated water such as rainwater and domestic water has dissolved iron content compared to groundwater. Therefore, the water reservoir portion 7 formed on the ground may be open to the atmosphere.
【００３１】[0031]
【発明の効果】上記のように本発明の請求項１記載の発
明にあっては、返送管の先端部に水を吐出する部分を長
手方向にわたって備えた筒状をした返送用ストレーナを
設け、この返送用ストレーナを粘性土層のような透水係
数の低い地盤間に存在する砂層等の透水係数の高い地盤
内に該透水係数の高い地盤に沿って横向きに埋設し、返
送管から横向きに埋設した返送用ストレーナに水を加圧
して送って横向きに埋設した返送用ストレーナから粘性
土層のような透水係数の低い地盤間に存在する透水係数
の高い地盤に水を返送するので、粘性土層のような透水
係数の低い地盤間に存在する砂層のような透水係数の高
い地盤に広範囲にわたって水を返送することができると
ともに地盤中に返送するのに要する加圧力も小さくてす
み、少ないエネルギーで効率よく地盤に水を返送して地
下水という形態で水資源の保全を図ることができるもの
である。As described above, in the invention according to claim 1 of the present invention, a return strainer having a tubular shape provided with a portion for discharging water in the longitudinal direction is provided at the tip end portion of the return pipe, This return strainer is used as a water permeability member such as a clay layer.
By embedding horizontally in the ground with high permeability such as sand layer existing between low number of ground along the ground with high permeability, pressurizing and sending water from the return pipe to the return strainer embedded horizontally. Viscosity from return strainer buried horizontally
Since water is returned to the soil with a high coefficient of permeability that exists between the soil with a low coefficient of permeability, such as a soil layer
It is possible to return water over a wide range to the ground with a high hydraulic conductivity such as a sand layer existing between the ground with a low coefficient, and the pressure required to return it into the ground is small, so that the ground can be efficiently converted with a small amount of energy. It is possible to conserve water resources in the form of groundwater by returning water.
【００３２】また、請求項２記載の発明にあっては、上
記請求項１記載の発明の効果に加えて、地盤に埋設した
揚水用ケーシング管の内部に流入した地下水を揚水して
返送管を経て返送管の先端部に設けた横向きに埋設した
返送用ストレーナから透水係数の高い地盤に水を返送す
るので、汲み上げた地下水を再び地下水として戻すこと
で水資源の有効保全が図れ、自然環境を保全できるもの
であり、揚水用ケーシング管の内部に流入した地下水を
揚水して返送管の先端部に設けた横向きに埋設した返送
用ストレーナから透水係数の高い地盤に地下水を加圧し
て返送する一連の揚水返送路を形成し、この一連の揚水
返送路を大気から遮断した密閉流路として揚水用ケーシ
ング管から地下水を揚水して返送用ストレーナを介して
透水係数の高い地盤中に返送するまでの間中水が大気に
触れないようにするので、揚水から再び返送という一連
の地下水の流れにおいて地下水が大気に接することがな
く、このため、地下水を揚水した際に、地下水中に含ま
れる溶解鉄分が大気に接して酸化することにより酸化粒
状物が生成するという現象が生じず、酸化粒状物により
地盤が目詰まりすることがなく、スムーズに地下水を地
中に返送できて、返送効率が良くなるという利点があ
り、また、一連の揚水返送路を大気から遮断した密閉流
路としてあることで、従来のように揚水した地下水を地
上でいったん溜めておくための大気開放型の大型の水溜
めタンクが必要でなく、地上に設置する装置が占めるス
ペースが狭くて良いものである。In addition to the effect of the invention according to claim 1, the invention according to claim 2 pumps up the groundwater that has flowed into the inside of the pumping casing pipe buried in the ground to form a return pipe. After that, water is returned to the ground with a high hydraulic conductivity from the horizontal return buried strainer installed at the tip of the return pipe, so that the groundwater pumped can be returned as groundwater again to ensure effective conservation of water resources and improve the natural environment. A series of pumping and returning the groundwater that flows into the pumping pipe to the ground with a high hydraulic conductivity from the laterally buried return strainer installed at the tip of the return pipe. The pumping water return path is formed, and the series of pumping water return paths are closed as a closed flow path from the atmosphere to pump groundwater from the pumping casing pipe, and through the return strainer, a high hydraulic conductivity Since the water does not come into contact with the atmosphere until it is returned to the inside, the groundwater does not come into contact with the atmosphere in the series of groundwater flow from pumping to the return, and therefore when the groundwater is pumped There is no phenomenon that oxidized particulate matter is generated due to oxidation of dissolved iron content contained in the atmosphere in contact with the atmosphere, ground is not clogged with oxidized particulate matter, and groundwater can be smoothly returned to the ground. In addition, it has the advantage of improving the return efficiency, and since the series of pumping return channels are closed channels that are shielded from the atmosphere, they are open to the atmosphere to store pumped groundwater on the ground as in the past. It does not require a large water tank and the space occupied by the equipment installed on the ground is small.
【００３３】また、請求項３記載の発明にあっては、上
記請求項２記載の発明の効果に加えて、揚水用ケーシン
グ管を埋設して揚水する地盤と揚水した地下水を返送す
る地盤とを地下仕切りにより仕切るので、返送した地下
水が揚水する地盤側に流れ込むことがないものであり、
揚水した場所の地下工事や地盤改良に悪影響を与えない
ものである。In addition to the effect of the invention according to claim 2, the invention according to claim 3 further comprises a ground for burying a casing pipe for pumping water for pumping and a ground for returning pumped groundwater. Since it is partitioned by the underground partition, the returned groundwater will not flow into the ground side where it is pumped,
It does not adversely affect the underground construction and ground improvement of the pumped place.
【００３４】また、請求項４記載の発明にあっては、上
記請求項１記載の発明の効果に加えて、地上に設けた水
溜め部に溜めた水を返送管から横向きに埋設した返送用
ストレーナに加圧して送って横向きに埋設した返送用ス
トレーナから透水係数の高い地盤に水を返送するので、
雨水、生活用水の処理水等を水溜め部に溜め、これを砂
層のような透水係数の高い地盤に広範囲にわたって水を
返送することができ、これにより雨水や生活用水の処理
水を地下水という形態で水資源の保全ができるものであ
る。In addition to the effect of the invention described in claim 1, the invention described in claim 4 is for returning the water stored in a water reservoir provided on the ground sideways from the return pipe. Since water is returned to the ground with a high hydraulic conductivity from the return strainer that is pressurized and sent to the strainer and buried horizontally,
It is possible to store treated water such as rainwater and domestic water in a water reservoir, and return the water over a wide area to a ground with a high hydraulic conductivity such as a sand layer. The water resources can be conserved at.
【図１】本発明の概略構成図である。FIG. 1 is a schematic configuration diagram of the present invention.
【図２】同上の返送用ストレーナ部分の拡大断面図であ
る。FIG. 2 is an enlarged sectional view of a return strainer portion of the above.
【図３】同上の流入用ストレーナ部分の拡大断面図であ
る。FIG. 3 is an enlarged sectional view of an inflow strainer portion of the above.
【図４】（ａ）（ｂ）は同上の返送用ストレーナを透水
係数の高い地盤に横向きに埋設する順序を示す説明図で
ある。4 (a) and 4 (b) are explanatory views showing an order of horizontally embedding the return strainer in the ground having a high water permeability.
【図５】本発明の他の実施形態の概略構成図である。FIG. 5 is a schematic configuration diagram of another embodiment of the present invention.
１ 返送管 ２ 返送用ストレーナ ３ 地盤 ３ａ 地盤 ３ｂ 地盤 ３ａ１ 透水係数の高い地盤 ４ 揚水用ケーシング管 ５ 揚水返送路 ６ 地下仕切り ７ 水溜め部 1 Return pipe 2 Return strainer 3 ground 3a ground 3b ground 3a1 Ground with high hydraulic conductivity 4 Casing pipes for pumping water 5 Pumped water return path 6 underground partition 7 water reservoir
───────────────────────────────────────────────────── フロントページの続き (73)特許権者 000141082 株式会社関配 東京都品川区東五反田５丁目22番27号 (72)発明者 高橋 茂吉 岩手県北上市和賀町岩崎新田５地割16番 地81 有限会社アサヒテクノ内 (72)発明者 松村 修一 大阪市中央区大手前１丁目７番24号 成 幸工業株式会社内 (56)参考文献 特開 平８−289678（ＪＰ，Ａ) 特開 昭61−204413（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continued front page (73) Patent holder 000141082 Kanrei Co., Ltd. 5-22-22 Higashigotanda, Shinagawa-ku, Tokyo (72) Inventor Shigekichi Takahashi Iwasaki Nitta 5 Waka-cho 16th, Waga-cho, Kitakami City, Iwate Prefecture Chi 81 Asahi Techno Co., Ltd. (72) Inventor Shuichi Matsumura 1-7-24 Otemae, Chuo-ku, Osaka Inside Koyuki Industry Co., Ltd. (56) Reference JP-A-8-289678 (JP, A) JP-A-61-204413 (JP, A)
Claims (4)
手方向にわたって備えた略筒状をした返送用ストレーナ
を設け、この返送用ストレーナを粘性土層のような透水
係数の低い地盤間に存在する砂層等の透水係数の高い地
盤内に該透水係数の高い地盤に沿って横向きに埋設し、
返送管から横向きに埋設した返送用ストレーナに水を加
圧して送って横向きに埋設した返送用ストレーナから粘
性土層のような透水係数の低い地盤間に存在する透水係
数の高い地盤に水を返送することを特徴とする地盤に水
を返送する方法。1. A return strainer having a substantially cylindrical shape provided with a portion for discharging water over the longitudinal direction is provided at the tip of the return pipe, and the return strainer is used as a water-permeable material such as a viscous soil layer.
Embedded laterally along the ground with a high permeability in the ground with a high permeability such as a sand layer existing between the ground with a low coefficient ,
Viscosity from the return for the strainer embedded in the landscape and send pressurizes the water to return for the strainer embedded in the landscape from the return pipe
A method for returning water to the ground, which is characterized by returning water to the ground having a high permeability existing between the ground having a low permeability such as a soil layer .
部に流入した地下水を揚水して返送管を経て返送管の先
端部に設けた返送用ストレーナから透水係数の高い地盤
に水を返送する方法であって、揚水用ケーシング管の内
部に流入した地下水を揚水して返送管の先端部に設けた
横向きに埋設した返送用ストレーナから透水係数の高い
地盤に地下水を加圧して返送する一連の揚水返送路を形
成し、 この一連の揚水返送路を大気から遮断した密閉流路とし
て揚水用ケーシング管から地下水を揚水して返送用スト
レーナを介して透水係数の高い地盤中に返送するまでの
間中水が大気に触れないようにすることを特徴とする請
求項１記載の地盤に水を返送する方法。2. A method of pumping groundwater which has flowed into a pumping casing pipe buried in the ground, and returning the water through a return pipe to a ground having a high hydraulic conductivity from a return strainer provided at the tip of the return pipe. A series of pumped water that pumps the groundwater that has flowed into the pump casing pipe and pressurizes and returns the groundwater from the laterally embedded return strainer installed at the tip of the return pipe to the ground with high hydraulic conductivity. Forming a return path, this series of pumping return paths is a closed flow path that is cut off from the atmosphere until the ground water is pumped from the pumping casing pipe and returned to the ground with high permeability through the return strainer. The method for returning water to the ground according to claim 1, wherein the water is prevented from coming into contact with the atmosphere.
地盤と揚水した地下水を返送する地盤とを地下仕切りに
より仕切ることを特徴とする請求項２記載の地盤に水を
返送する方法。3. The method for returning water to the ground according to claim 2, wherein the ground for burying the pumping casing pipe and pumping the ground and the ground for returning the pumped groundwater are partitioned by an underground partition.
管から横向きに埋設した返送用ストレーナに加圧して送
って横向きに埋設した返送用ストレーナから透水係数の
高い地盤に水を返送することを特徴とする請求項１記載
の地盤に水を返送する方法。4. The water stored in a water reservoir provided above the ground is pressurized and sent from a return pipe to a return strainer horizontally buried, and the water is returned from a return strainer buried horizontally to a ground having a high permeability coefficient. The method for returning water to the ground according to claim 1, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001054989A JP3493183B2 (en) | 2001-02-28 | 2001-02-28 | How to return water to the ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001054989A JP3493183B2 (en) | 2001-02-28 | 2001-02-28 | How to return water to the ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002256539A JP2002256539A (en) | 2002-09-11 |
| JP3493183B2 true JP3493183B2 (en) | 2004-02-03 |
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ID=18915243
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001054989A Expired - Lifetime JP3493183B2 (en) | 2001-02-28 | 2001-02-28 | How to return water to the ground |
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| Country | Link |
|---|---|
| JP (1) | JP3493183B2 (en) |
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2001
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| JP2002256539A (en) | 2002-09-11 |
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