Canal lining repair buried pipe water delivery and cofferdam cut-off foundation pit and its construction method

A technology of cofferdams and channels, applied in the diversion field of water conservancy and hydropower projects, can solve the problems of long water delivery channels, etc., and achieve the effects of reducing water head, avoiding pressure damage, and achieving great social and economic benefits

Active Publication Date: 2019-10-08
CHANGJIANG SURVEY PLANNING DESIGN & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, the water delivery channel is long, and the parts to be repaired may be distributed in many different places along the line, so there is an urgent need for a fast, convenient and recyclable cofferdam structure.

Method used

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  • Canal lining repair buried pipe water delivery and cofferdam cut-off foundation pit and its construction method
  • Canal lining repair buried pipe water delivery and cofferdam cut-off foundation pit and its construction method

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Embodiment Construction

[0032] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation to the present invention, they are only examples, and at the same time, the advantages of the present invention will become clearer and easier to understand.

[0033] Technical research has been carried out on the main canal of the first phase of the middle line of the South-to-North Water Diversion Project. The project adopts a trapezoidal section, and the thickness of the full-section cast-in-place concrete lining slab is 8cm-10cm. The lower part of the lining slab is anti-seepage with a composite geomembrane. Concealed pipes (water-permeable hoses), check valves, etc. are representative of long-distance water delivery channels.

[0034] The channel lining of the present invention repairs the buried pipe water delivery and cofferdam cut-off type foundation pit, which is characterized in that: the water chan...

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Abstract

The invention discloses a canal lining repair buried pipe water delivery and cofferdam cut-off type foundation pit and method, characterized in that: the water channel (1) includes a lining board (2) laid along the water delivery direction and a lining board (2) laid along the lining board (2) Sloping channel slopes (3) symmetrically arranged; respectively arrange a cofferdam (4) in the upstream and downstream of the water channel (1), and the cofferdams (4) in the upstream and downstream all cut off the channel Slope (1), the dry foundation pit (5) is formed between the cofferdam (4) and the lining board (2) at the bottom, which overcomes the local water head of the channel caused by freeze-thaw and construction quality in the prior art. The shortcomings of increased losses, damage to the anti-seepage system, and slope instability in severe cases have the advantages of repairing the canal lining without interrupting the water supply, and have the advantages of greater social and economic benefits.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering construction diversion, and more specifically relates to canal lining repair buried pipe water delivery and cofferdam cut-off foundation pit and construction method. Background technique [0002] In order to solve the imbalance of regional water resources, there are more and more water transfer projects in our country. With the completion and operation of the project, the water delivery channel is affected by various factors such as channel water level changes, drainage system operation conditions, freeze-thaw, construction quality, etc., and the concrete lining board may be damaged in the form of cracking, collapse, anti-floating instability, etc. , to a certain extent, it will lead to the increase of local head loss of the channel, the damage of the anti-seepage system, and in severe cases, the instability of the slope, which will affect the safe operation of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B5/00E02B5/02E02D19/02E02D19/04
Inventor 吴德绪谢向荣倪锦初刘百兴李蘅简兴昌倪晖徐唐锦苏利军周嵩段寅赵峰黄红杜泽金胡田清
Owner CHANGJIANG SURVEY PLANNING DESIGN & RES
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