JP2005155298A - Combination type underground reservoir - Google Patents
Combination type underground reservoir Download PDFInfo
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- JP2005155298A JP2005155298A JP2003435344A JP2003435344A JP2005155298A JP 2005155298 A JP2005155298 A JP 2005155298A JP 2003435344 A JP2003435344 A JP 2003435344A JP 2003435344 A JP2003435344 A JP 2003435344A JP 2005155298 A JP2005155298 A JP 2005155298A
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Abstract
Description
降雨時の流出抑制対策手法のうち、地下に貯留槽を構築する工法と、凹地に雨水を貯留する工法を連通させ、初期降雨から計画降雨以下の貯留を地下式部分で行い、計画降雨近傍の貯留を凹地と地下式貯留槽の両者で行う、雨水流出抑制のための施設及び計画。 Of the methods for controlling runoff during rainfall, the method of constructing a storage tank underground and the method of storing rainwater in a depression are communicated, and storage from the initial rainfall to the planned rainfall or less is performed in the underground section. Facilities and plans for rainwater outflow control, where storage is carried out in both recessed and underground storage tanks.
従来から地下式雨水貯留槽や凹地に貯留するオープン貯留施設は多く施工されてきた。
(1)地下式雨水貯留槽は、開発地等からの雨水を導水し、貯留と同じに許容量をオリフィス口から放流し、流入と流出の差分を貯留する形式であり、地下浸透型以外は完全閉鎖構造である。
(2)オープン型凹地貯留は、グランドや公園等の比較的広い敷地を周囲より低く掘り下げ、出来た凹地を貯留空間とする工法や、谷部等の雨水が集中しやすい地形を利用し、下流側に堰堤を構築することで貯水空間を構築する方法である。
(1) Underground rainwater storage tanks are designed to introduce rainwater from the development site, etc., discharge the allowable amount from the orifice port in the same way as storage, and store the difference between inflow and outflow. Fully closed structure.
(2) Open-type concave storage uses a construction method that digs a relatively large site, such as a ground or park, below the surroundings, and uses the resulting concave storage space, and terrain where rainwater is likely to concentrate in the valleys, etc. It is a method of building a water storage space by building a dam on the side.
従来技術には次ぎのような課題がある。
(1)地下式貯留槽の場合、施設を構築する工事費が高く、数十年に一回程度の発生確率の降雨に多額の資金を投下することとなり、経済効果が悪い。
(2)凹地の計画されるオープン式貯留施設の場合、小規模の降雨のたびに水が溜まり、グラウンドや公園の利用が妨げられ、公共の広場としての価値が損なわれることと、急激な降雨襲来の場合に利用者に危険性が及ぶ懸念がある。The prior art has the following problems.
(1) In the case of underground storage tanks, construction costs for constructing facilities are high, and a large amount of money is invested in rainfall with a probability of occurrence once in several decades, which is not economically effective.
(2) In the case of an open-type storage facility where depressions are planned, water accumulates in every small-scale rain, which impedes the use of the ground and park, impairs the value of a public square, and sudden rainfall There is concern that users may be at risk in the event of an attack.
本発明は以下の手順により課題の解決を行った。
(1)初期降雨による流出から計画値近傍の流出までは、従来の地下式貯留層構造にて貯留し、流出の抑制を行う。
(2)計画近傍の降雨による流出は、地下式貯留槽への流入水による槽内水深が上昇すると、当発明による開口部から越流を開始し、槽内の水位はそれ以上上昇しない。
(3)当発明による開口部から越流した流入水は、連通する凹地に流入しそこで貯留される。
(4)降雨後の凹地の排水は、外周に設けられた排水側溝を通じて、地下貯水槽の設けられた開口部より、地下貯留槽に排水される。The present invention has solved the problem by the following procedure.
(1) From the outflow due to the initial rainfall to the outflow near the planned value, it is stored in the conventional underground reservoir structure to suppress the outflow.
(2) The outflow due to rainfall in the vicinity of the plan starts overflowing from the opening according to the present invention when the water depth in the tank due to the inflow water to the underground storage tank rises, and the water level in the tank does not rise any further.
(3) The inflow water that overflowed from the opening according to the present invention flows into the communicating depression and is stored there.
(4) The drainage of the recessed area after the rain is drained to the underground storage tank through the drainage side groove provided on the outer periphery through the opening provided with the underground reservoir.
本発明は従来の技術に比べ次ぎのような効果が得られる。
(1)小規模な降雨や初期段階の降雨による流出水は全て地下式貯留槽に流入し、連通した凹地に雨水が滞留することがないので、グラウンドや公園等の利用を阻害することが無い。
(2)数十年に一回程度の発生規模の降雨時では、地下式貯留槽と凹地の貯留の合計が貯留量として流出抑制効果を発揮するので、効率良くしかも経済的な流出抑制効果が得られる。
(3)地下式貯留槽から越流した雨水が凹地に貯留される機械は非常に少なく、しかも降雨波形の性質上滞留時間も短時間であるので、グラウンドや公園等の使用に影響を及ぼさない。
(4)グラウンドや公園の凹地の排水は、地下式貯留槽に設けられた開口部を通じて地下式貯留槽に排水されるので、排水機能が向上することとなる。
(5)完全地下貯留槽に設置する放流オリフィス口の口径より大き目の口径とすることが可能であるので、初期流入すいの放流量を増加させることが可能で、貯留容量を小さくすることが出来る。The present invention provides the following effects as compared with the prior art.
(1) All spilled water due to small-scale rainfall or early-stage rainfall flows into the underground storage tank, and rainwater does not stay in the concavities that are connected to each other. .
(2) When rain occurs at a scale of about once every several decades, the sum of underground storage tanks and storage in the depressions exerts an outflow control effect as a storage volume, so that an effective and economical outflow control effect is achieved. can get.
(3) Since there are very few machines where rainwater overflowed from underground storage tanks is stored in the depressions, and the residence time is short due to the nature of the rainfall waveform, it does not affect the use of the ground, parks, etc. .
(4) Since the drainage of the ground or park depression is drained to the underground storage tank through the opening provided in the underground storage tank, the drainage function is improved.
(5) Since it is possible to make the diameter larger than the diameter of the discharge orifice port installed in the complete underground storage tank, it is possible to increase the discharge flow rate of the initial inflow pan and reduce the storage capacity. .
地下貯留槽の頂版部又は側壁の上部に、流入量以上の越流が可能となる開口部を設ける。この開口部は、凹地空間と連通させる。 At the top of the underground storage tank or the upper part of the side wall, an opening is provided that allows overflow of more than the inflow. The opening communicates with the recessed space.
凹地外周には排水側溝を施工し、凹地内の雨水や地か貯水槽から越流して滞留した雨水の排水を速やかに地下貯留槽内へ流入させる。 A drainage gutter will be constructed on the outer periphery of the depression, and the rainwater in the depression and the drainage of rainwater that has overflowed from the ground or the water storage tank will immediately flow into the underground storage tank.
地下貯留槽に設けられた開口部には、ゴミ補足の為のスクリーンを設ける。 At the opening provided in the underground storage tank, a screen for dust collection is provided.
地下貯留槽に設けられた開口部の底面より低い水路底と、凹地側の壁は開口部の底面より高い構造の水路を、地下貯留槽の開口部に接続して設置する。 A water channel bottom lower than the bottom surface of the opening provided in the underground storage tank and a water channel having a structure in which the wall on the concave side is higher than the bottom surface of the opening are connected to the opening of the underground storage tank.
1 地下貯留槽
2 放流オリフィス
3 側壁部開口
4 開口部越流水路
5 凹地
6 凹地外周排水側溝
7 頂版部開口DESCRIPTION OF SYMBOLS 1
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003435344A JP2005155298A (en) | 2003-11-25 | 2003-11-25 | Combination type underground reservoir |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003435344A JP2005155298A (en) | 2003-11-25 | 2003-11-25 | Combination type underground reservoir |
Publications (1)
Publication Number | Publication Date |
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JP2005155298A true JP2005155298A (en) | 2005-06-16 |
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ID=34736621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2003435344A Pending JP2005155298A (en) | 2003-11-25 | 2003-11-25 | Combination type underground reservoir |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104294903A (en) * | 2014-10-23 | 2015-01-21 | 天津市国威给排水设备制造有限公司 | Urban anti-waterlogging drainage system |
-
2003
- 2003-11-25 JP JP2003435344A patent/JP2005155298A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104294903A (en) * | 2014-10-23 | 2015-01-21 | 天津市国威给排水设备制造有限公司 | Urban anti-waterlogging drainage system |
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