Concentrated leakage blocking structure and method for turning dynamic water into still water in corridor
A corridor and static water technology, applied in infrastructure engineering, water conservancy engineering, sea area engineering, etc., can solve the problems of many failure cases and poor operability, achieve the effects of reducing project investment, overcoming slurry waste, and significant economic benefits
Pending Publication Date: 2019-06-07
CHANGJIANG SURVEY PLANNING DESIGN & RES
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Problems solved by technology
According to the actual engineering survey, it is feasible to directly grout the outlet (supplemented with a small water stop device) in the case of low water head and small flow rate (30L / s~100L / s), while in the case of high water head (100m level), large flow rate (1000L / s) and poor operability, many failure cases
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[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.
[0035] Such as figure 1As shown, the present invention provides a concentrated leakage sealing structure for turning dynamic water into still water in a corridor, including an upstream sealing wall 4, a downstream sealing wall 5, an upstream small cofferdam 2, a downstream small cofferdam 3, a drainage Steel pipe 8, drainage grouting steel pipe 7 and backfill steel pipe 6; the upstream sealing wall 4 and the downstream sealing wall 5 are respectively arranged on both sides of the seepage outlet 1 and connected with the concrete gallery top arch 12, the concrete gallery floor 11 and the concrete gallery The road side wall 16 cooperates to form a closed cavity structure, which serves as a closed water storage space to create conditi...
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The invention utilizes an existing corridor lining structure, (reinforced) concrete walls are respectively constructs upstream and downstream near a leakage outlet, and a local closed space is formedin the corridor; a drainage (grouting) steel pipe is installed, and leakage water is guided to drain out of the corridor to create a dry land construction condition; and an outlet gate valve of the drainage steel pipe is controlled to form a still water reverse grouting construction condition, and reverse grouting plugging is performed by utilizing a variable diameter grouting pipeline. If the corridor has a traffic requirement, after the plugging is successful and inspection is qualified, a plugging body is drilled and exploded to penetrate through upstream and downstream corridors. The invention provides a method for performing plugging treatment in a narrow corridor and under a hydrostatic pressure condition, and the method has the advantages of strong operability, safety and reliability, and the like.
Description
technical field [0001] The technical field of water conservancy and hydropower engineering of the present invention specifically relates to a concentrated seepage sealing structure and method for turning moving water into still water in a corridor. Background technique [0002] In the construction of water conservancy and hydropower projects, the problem of high water head and large flow pipeline concentrated leakage occurs from time to time, especially in karst areas with complex geological conditions, it is more common for high pressure water to penetrate the corridor lining and cause leakage, such as: Geheyan Hydropower Station and Shuibuya Hydropower Station in Qingjiang, Hubei; Pingzhai Water Conservancy Project in Sanchahe, the main stream of Wujiang River in Guizhou; Suofengying Hydropower Station, Goupitan Hydropower Station in Wujiang River, and Tingzikou Hydropower Station in Jialing River. The serious concentrated leakage problem seriously affects the progress of ...
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IPC IPC(8): E02B3/16E02D19/04
Inventor 王汉辉邹德兵于习军徐年丰刘加龙闵征辉闫福根郭志华熊瑶傅兴安
Owner CHANGJIANG SURVEY PLANNING DESIGN & RES