JP3200781B2 - How to reduce groundwater - Google Patents
How to reduce groundwaterInfo
- Publication number
- JP3200781B2 JP3200781B2 JP04603393A JP4603393A JP3200781B2 JP 3200781 B2 JP3200781 B2 JP 3200781B2 JP 04603393 A JP04603393 A JP 04603393A JP 4603393 A JP4603393 A JP 4603393A JP 3200781 B2 JP3200781 B2 JP 3200781B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- groundwater
- permeable layer
- excavated
- pumped
- 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
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、掘削した地盤の地下水
位を低下させるために揚水した地下水を、再び地中に還
元する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for returning groundwater pumped to lower the groundwater level of excavated ground to the ground again.
【０００２】[0002]
【従来の技術】連続地中壁、杭、シ−トパイルなどの山
止めを施工し、それらの内側の地盤を掘削した場合、掘
削底部の土砂が地下水と共に吹き上がるボイリングが発
生することがある。このようなボイリングを防止するた
めには、揚水井戸を掘って掘削底部の地下水位を低下さ
せる必要があり、揚水した地下水は下水道を使用して排
水するか、またはボ−リング孔から地中に還元されてい
る。2. Description of the Related Art When landslides such as continuous underground walls, piles, sheet piles, etc. are constructed and the ground inside them is excavated, boiling at the bottom of the excavation may be generated together with groundwater. In order to prevent such boiling, it is necessary to dig a pumping well to lower the groundwater level at the bottom of the excavation, and the pumped groundwater should be drained using sewerage or drained from the borehole. Has been reduced.
【０００３】[0003]
【発明が解決しようとする課題】上記の従来技術は、揚
水した地下水を下水道あるいはボ−リング孔を介して排
水させているが、下水道の使用料、あるいはボ−リング
孔の掘削費用が高くなり、不経済である。In the above-mentioned prior art, the pumped groundwater is drained through a sewer or a boring hole. However, the cost of using the sewer or excavation cost of the boring hole increases. Uneconomical.
【０００４】[0004]
【本発明の目的】本発明は、上記のような問題点を解決
するためになされたもので、経済的な施工が可能な地下
水の還元方法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method of reducing groundwater which can be economically constructed.
【０００５】[0005]
【課題を解決するための手段】即ち、本発明は、掘削し
た地盤の地下水位を低下させるために揚水した地下水
を、再び地中に還元する方法において、連続地中壁等の
山止めの外面側に透水層を形成し、山止めの内側の掘削
地盤から揚水した地下水を、前記透水層を介して再び山
止め外側の地中に還元することを特徴とした、地下水の
還元方法である。That is, the present invention relates to a method for returning groundwater pumped to lower the groundwater level of excavated ground to the ground again. A method of reducing groundwater, comprising forming a permeable layer on the side, and returning groundwater pumped from the excavated ground inside the dam to the ground outside the dam again via the permeable layer.
【０００６】[0006]
【実施例】以下、図面を参照しながら、本発明の一実施
例について説明する。なお、本実施例では山止めに連続
地中壁を用いた場合について説明する。 ＜イ＞透水層の構造（図１） 連続地中壁を地中に構築するに当たって、鉄筋籠１の外
面側に透水層１１を付設する。透水層１１としては、布
製シ−トなどの透水性部材を用い、これを鉄筋籠１の外
面側の全面にわたって付設する。透水層１１の厚さは、
揚水した地下水を十分に吸収し、地中に効率良く排水で
きる厚さに設定する。An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, a case in which a continuous underground wall is used for a mountain stop will be described. <A> Structure of Permeable Layer (FIG. 1) In constructing the continuous underground wall in the ground, a permeable layer 11 is provided on the outer surface side of the reinforcing bar 1. As the water permeable layer 11, a water permeable member such as a cloth sheet is used, and is provided over the entire outer surface side of the reinforcing bar cage 1. The thickness of the permeable layer 11 is
It is set to a thickness that can sufficiently absorb the pumped groundwater and drain efficiently into the ground.
【０００７】＜ロ＞山止めの構築（図２） 透水層１１を付設した鉄筋籠１を、地盤に掘削した溝内
に建込む。次に、トレミ−管により溝内にコンクリ−ト
２を打設する。コンクリ−ト２が硬化すれば、外面側に
透水層１１を有する連続地中壁が完成する。<B> Construction of a mountain stop (FIG. 2) The reinforcing cage 1 provided with the permeable layer 11 is built in a trench excavated in the ground. Next, the concrete 2 is cast into the groove by using a toremy tube. When the concrete 2 is hardened, the continuous underground wall having the permeable layer 11 on the outer surface side is completed.
【０００８】＜ハ＞地下水の還元（図３） 連続地中壁２１内を掘削し、掘削底部３の地盤改良を行
う場合、掘削底部３にボイリングが発生しないように、
地下水を低下させる必要がある。この場合、揚水パイプ
４を、底部３の連続地中壁２１の下端よりも深い位置ま
で打設し、ポンプ４１により地下水を揚水する。そし
て、揚水した地下水は、透水層１１の上部に連結した還
元パイプ４２を介して透水層１１に吸収させ、さらに透
水層１１から地中に浸透させる。これによって、揚水し
た地下水を、下水道もボ−リング孔も使用することな
く、地中に還元することが可能となる。なお上記実施例
は、山止めに連続地中壁を用いた場合であるが、杭やシ
−トパイルなどを山止めとして用いた場合も、同じ様に
それらの外面側に透水層を設けることによって、同様の
効果を得ることができる。<C> Reduction of groundwater (FIG. 3) When the inside of the continuous underground wall 21 is excavated and the ground of the excavated bottom 3 is improved, boiling is not generated in the excavated bottom 3.
Groundwater needs to be reduced. In this case, the pumping pipe 4 is driven to a position deeper than the lower end of the continuous underground wall 21 of the bottom 3, and the pump 41 pumps the groundwater. Then, the pumped groundwater is absorbed by the permeable layer 11 via the reduction pipe 42 connected to the upper part of the permeable layer 11, and further permeates from the permeable layer 11 into the ground. This makes it possible to return the pumped groundwater to the ground without using a sewer or a borehole. In the above embodiment, the continuous underground wall is used for the ridges. However, when a pile, a sheet pile, or the like is used as the ridges, the permeable layer is similarly provided on the outer surface side thereof. The same effect can be obtained.
【０００９】[0009]
【本発明の効果】本発明は以上説明したようになるた
め、次のような効果を得ることができる。 ＜イ＞山止めの外面側に設けた透水層を介して、揚水し
た地下水を地中に還元して排水することができる。従っ
て、従来のように下水道やボ−リング孔を使用する必要
がなく、経費の削減を図ることができる。Since the present invention has been described above, the following effects can be obtained. <B> The pumped groundwater can be returned to the ground and drained through a permeable layer provided on the outer surface side of the mountain stop. Therefore, it is not necessary to use a sewer or a bore hole as in the conventional case, and the cost can be reduced.
【００１０】＜ロ＞透水層は、山止めに付設して地中に
建込むだけで済むため、施工が容易である。<B> The permeable layer can be constructed simply by being attached to the ridge and built underground, so that the construction is easy.
【図１】 透水層を付設した鉄筋籠の斜視図FIG. 1 is a perspective view of a reinforcing rod cage provided with a permeable layer.
【図２】 山止めの構築工程の説明図FIG. 2 is an explanatory view of a construction process of a mountain stop.
【図３】 地下水の還元工程の説明図FIG. 3 is an explanatory diagram of a process of reducing groundwater.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 横山 正治 東京都新宿区西新宿一丁目25番１号 大 成建設株式会社内 (56)参考文献 特開 昭63−277322（ＪＰ，Ａ) 特開 昭61−204413（ＪＰ，Ａ) 特開 昭61−1715（ＪＰ，Ａ) 特開 平２−140318（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) E02D 3/10 E02D 19/10 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shoji Yokoyama 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Inside Taisei Corporation (56) References JP-A-63-277322 (JP, A) JP-A-63-277322 JP-A-61-204413 (JP, A) JP-A-61-1715 (JP, A) JP-A-2-140318 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) E02D 3 / 10 E02D 19/10
Claims (1)
めに揚水した地下水を、再び地中に還元する方法におい
て、 連続地中壁等の山止めの外面側に透水層を形成し、 山止めの内側の掘削地盤から揚水した地下水を、 前記透水層を介して再び山止め外側の地中に還元するこ
とを特徴とした、 地下水の還元方法。1. A method of reducing groundwater level of excavated ground to reduce groundwater pumped down to the ground again, comprising forming a permeable layer on an outer surface side of a yard stop such as a continuous ground wall, Groundwater pumped from the excavated ground inside the ground is returned to the ground outside the yard stop again through the permeable layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04603393A JP3200781B2 (en) | 1993-02-12 | 1993-02-12 | How to reduce groundwater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04603393A JP3200781B2 (en) | 1993-02-12 | 1993-02-12 | How to reduce groundwater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06240656A JPH06240656A (en) | 1994-08-30 |
| JP3200781B2 true JP3200781B2 (en) | 2001-08-20 |
Family
ID=12735732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04603393A Expired - Fee Related JP3200781B2 (en) | 1993-02-12 | 1993-02-12 | How to reduce groundwater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3200781B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6395280B1 (en) | 1998-03-31 | 2002-05-28 | Kikkoman Corporation | Deodorant agents for oral use for discharges and method for relieving odor of discharges |
| US6749875B2 (en) | 2000-03-03 | 2004-06-15 | Citrus Sensation, Pty. Ltd. | Fruit and vegetable preservative |
| US6800433B1 (en) | 1999-04-23 | 2004-10-05 | Kyowa Hakko Kogyo Co., Ltd. | Process for purification of proanthocyanidin oligomer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101961284B1 (en) * | 2018-09-19 | 2019-03-22 | 지에스이앤씨(주) | System for flow-back underground water occurred by the De-Watering |
-
1993
- 1993-02-12 JP JP04603393A patent/JP3200781B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6395280B1 (en) | 1998-03-31 | 2002-05-28 | Kikkoman Corporation | Deodorant agents for oral use for discharges and method for relieving odor of discharges |
| US6800433B1 (en) | 1999-04-23 | 2004-10-05 | Kyowa Hakko Kogyo Co., Ltd. | Process for purification of proanthocyanidin oligomer |
| US6749875B2 (en) | 2000-03-03 | 2004-06-15 | Citrus Sensation, Pty. Ltd. | Fruit and vegetable preservative |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06240656A (en) | 1994-08-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |