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

A bypass pipe and channel technology, applied in the field of diversion in the construction of water conservancy and hydropower projects, can solve problems such as long water delivery channels, and achieve the effects of reducing water head, avoiding damage to uplift pressure, and achieving great social and economic benefits.

Active Publication Date: 2018-10-19
CHANGJIANG SURVEY PLANNING DESIGN & RES
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the water delivery channel is long, and the parts to be repaired may be distributed in many different places along the line. Therefore, there is an urgent need for a water delivery structure that meets the requirements of fast, convenient, and recyclable construction.

Method used

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

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Embodiment Construction

[0033] 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.

[0034] 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 or a rectangular structure. 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. It is composed of layer, drainage hidden pipe (permeable hose), check valve, etc., and is representative of long-distance water delivery channels.

[0035] refer to Figure 1-2 Shown: channel lining repair bypass pipe water delivery and cofferdam cut-off type foundation pit, ch...

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Abstract

The invention discloses a channel lining repair bypass pipe water delivery and a cofferdam cut-off foundation pit and a construction method. A cofferdam (4) is respectively arranged on the upstream and downstream of the water channel (1), and the above-mentioned cofferdams on the upstream and downstream The weirs (4) all cut off the water channel (1), and a dry foundation pit (5) is formed between the cofferdam (4) and the lining board (2) at the bottom. A bypass pipe (1.2) is provided on one side of the bridleway (1.1), and one end of the bypass pipe (1.2) is arranged along the slope (3) until reaching the water passage at the front end of the upstream cofferdam (4). Below the water surface of the channel (1), the other end extends below the water surface of the water channel (1) behind the downstream cofferdam (4). The disadvantage of increased head loss has the advantages of repairing channel lining under the condition of uninterrupted water supply, and has great 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 bypass 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): E02B5/02E02D19/04
CPCE02B5/02E02D19/04
Inventor 倪锦初谢向荣吴德绪刘百兴李蘅简兴昌倪晖徐唐锦苏利军周嵩段寅赵峰黄红朱祖国杨谢芸
Owner CHANGJIANG SURVEY PLANNING DESIGN & RES
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