Composite boxed cofferdam and building method thereof

A construction method and composite technology, applied in construction, caisson, infrastructure engineering, etc., can solve the problems that the thickness of the bottom concrete cannot meet the requirements of pumping, the stability cannot meet the requirements, and the cofferdam construction cannot be carried out, etc., to achieve the quality of rejection Difficult-to-control processes, material saving, and improved positioning accuracy

Inactive Publication Date: 2009-02-04
CHINA MAJOR BRIDGE ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the riverbed cover layer is shallow or even the bedrock is exposed, or the riverbed soil is hard, it is difficult for the cofferdam to sink to a sufficient depth, and its stability is difficult to meet the requirements
In addition, when the bottom surface of the cap is close to the bedrock surface of the river bed, the thickness of the bottom concrete cannot meet the pumping requirements, and cofferdam construction will not be possible.

Method used

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  • Composite boxed cofferdam and building method thereof
  • Composite boxed cofferdam and building method thereof
  • Composite boxed cofferdam and building method thereof

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Embodiment Construction

[0020] This embodiment is used to explain the claims of the present invention, and the protection scope of the present invention is not limited to the description of the following structures.

[0021] Such as figure 1 As shown, the double-wall steel cofferdam body 1 is connected between the inner wall 4 and the outer wall 5 through support rods and / or support beams, and it is placed on the bedrock 10 . In this embodiment, the inner wall 4 and the outer wall 5 are welded and connected by a supporting steel 7 . The bottom surface of the inner wall 4 of the double-wall steel cofferdam is in contact with the surface of the bedrock 10 , and the bottom surface of the inner wall 4 is the blade foot 6 in this embodiment. Several steel plates are arranged vertically between the outer wall 5 and the inner wall 4 of the cofferdam to divide the wall panels of the cofferdam into several cabins isolated from each other.

[0022] The bedrock 10 is provided with a bedrock hole 8 relative to...

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Abstract

The invention discloses a composite casing box cofferdam and a construction method thereof. A double-wall steel cofferdam which consists of an inner wall and an outer wall which are connected is arranged on bedrock, positioned and fixed; mad and sand between the inner wall and the outer wall of the cofferdam are cleared; a bed rock hole is drilled on the bedrock between the inner wall and the outer wall of the cofferdam; steel reinforcement cages are arranged in the bedrock hole and between the inner wall and the outer wall of the cofferdam; bottom sealing concrete is poured into the bedrock hole and between the inner wall and the outer wall of the cofferdam, to construct the composite casing box cofferdam. The invention has the advantages of convenient construction, material saving, stable structure and high positioning precision.

Description

technical field [0001] The invention belongs to a cofferdam used for the construction of low pile caps in bridge water, in particular to a composite casing cofferdam suitable for riverbeds with no covering layer or shallow covering layer and a construction method thereof. Background technique [0002] Cofferdams are indispensable temporary water-retaining structures for foundation construction in bridge water. According to different cofferdam construction materials, they can be divided into earth-rock cofferdams, concrete cofferdams and steel cofferdams; according to different use methods of cofferdams, they can be divided into Box cofferdam and hanging box cofferdam: The hanging box cofferdam is equipped with a bottom plate, and the cofferdam is not in contact with the river bed, and is often used in the construction of high pile caps; the box cofferdam does not have a bottom plate, and its bottom is buried at a certain depth below the river bed , relying on the foundation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/04E02D23/08E02D23/16
Inventor 张立超陈崇林秦顺全宋杰高培成朱鹏飞刘崇亮杨新林李海华
Owner CHINA MAJOR BRIDGE ENG
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