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Cofferdam semi-enclosed type foundation pit without interrupting water conveying during canal lining restoration and method

A semi-enclosed channel technology, applied in water conservancy projects, artificial waterways, infrastructure engineering, etc., can solve problems such as long water delivery channels, achieve the effects of reducing water head, reducing uplift pressure, and avoiding uplift pressure damage

Active Publication Date: 2017-01-18
CHANGJIANG SURVEY PLANNING DESIGN & RES
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In addition, the water delivery channel is long, and the parts to be repaired may be distributed in many different places along the line. There is an urgent need for a fast, convenient and recyclable repair device

Method used

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  • Cofferdam semi-enclosed type foundation pit without interrupting water conveying during canal lining restoration and method
  • Cofferdam semi-enclosed type foundation pit without interrupting water conveying during canal lining restoration and method

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Embodiment Construction

[0034] 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.

[0035] 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.

[0036] The channel lining of the present invention is repaired under the condition of uninterrupted water delivery, and the cofferdam semi-coffered foundation pit is characterized...

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Abstract

The invention discloses a cofferdam semi-enclosed type foundation pit without interrupting water conveying during canal lining restoration and a method. The foundation pit is characterized in that a water canal (1) comprises lining plates (2) laid in the water conveying direction and oblique canal slopes (3) symmetrically arranged along the lining plates (2); a cofferdam (4) is arranged on the water canal (1); the cofferdam (4) is located on one side of the water canal (1) and fixed to the canal slopes (3); the lower portion of the cofferdam (4) and the water canal (1) form a fastland foundation pit body (5); the cofferdam (4) is of a modular buoyancy tank steel structures; and exhaust and water drainage structures (4.1) are arranged in the cofferdam (4). The defect that in the prior art, cofferdams can cause damage to canal structures is overcome, and the foundation pit has the advantages of being greatly reducing flood peak in the foundation pit and effectively reducing uplift pressure borne by lining in the foundation pit.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower engineering construction diversion, and more specifically relates to a cofferdam semi-coffered foundation pit and a method thereof under the condition of channel lining repair without interrupting water delivery. 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, whic...

Claims

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Application Information

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IPC IPC(8): E02D19/04E02B5/02
CPCE02B5/02E02D19/04
Inventor 谢向荣吴德绪倪锦初刘百兴李蘅简兴昌倪晖熊焰徐唐锦苏利军周嵩段寅石裕杜泽金朱祖国
Owner CHANGJIANG SURVEY PLANNING DESIGN & RES
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