Deepwater single-wall steel plate pile cofferdam structure with low buried depth and construction method thereof

A technology of steel sheet pile cofferdam and soil penetration depth, which is applied in the direction of foundation structure engineering, construction, etc., can solve the problem that the depth of steel sheet piles cannot meet the requirements of normal soil penetration depth, and achieve the effects of enhancing rigidity, increasing void ratio, and reducing the degree of damage

Active Publication Date: 2012-02-29
THE FIRST ENG OF CCCC FOURTH HARBOR ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of this invention is to solve the technical problem that the penetration depth of the steel sheet piles of the cofferdam cannot meet the requirements of the normal penetration depth, and propose a new steel sheet pile cofferdam structure and its construction method

Method used

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  • Deepwater single-wall steel plate pile cofferdam structure with low buried depth and construction method thereof
  • Deepwater single-wall steel plate pile cofferdam structure with low buried depth and construction method thereof
  • Deepwater single-wall steel plate pile cofferdam structure with low buried depth and construction method thereof

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Embodiment Construction

[0054] Such as Figure 1a~1c Shown is a schematic diagram of a steel sheet pile cofferdam structure example of the present invention.

[0055] Now take the construction of a highway bridge in a certain city as an example. The span combination of the main bridge is (80m+200m+80m) self-anchored suspension bridge. The main piers are No. 16 and No. 17 piers, which are located in the Huaihe waterway. The covering layer is mainly composed of silt, clay, fine sand, and gravel sand, and the thickness of the covering layer is 5.5-11m, which varies greatly. The underlying bedrock from top to bottom is fully weathered amphibolite, strongly weathered mixed granite, moderately weathered amphibolite, and moderately weathered mixed granite.

[0056] The rock surface elevation of No. 16 pier provided by the original design drawings is -2.86m, and that of No. 17 pier is -0.76m. Due to the great fluctuation of the rock surface, it was found that the bottom of the steel sheet pile was far from ...

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Abstract

The invention discloses a deepwater single-wall steel plate pile cofferdam structure with low buried depth. The structure comprises a plurality of bored piles, a steel plate pile cofferdam around the bored piles, bagged sand positioned outside the cofferdam and arranged on the surface of a river bed, and high-pressure rotary jet piles constructed in the cofferdam and outside the bored piles, wherein the plane size of the cofferdam is greater than that of a bearing platform to be constructed so as to reserve a construction space. By using the steel plate pile cofferdam, the deepwater low pile bearing platform and the underwater part of a pier of a bridge can be constructed with relatively low cost and minimum construction risk, and a double-wall steel cofferdam scheme with relatively high cost does not need to be adopted for construction, so that the turnover steel consumption of the cofferdam serving as a temporary project is saved, and the application range of the deepwater steel plate pile cofferdam construction technology is enlarged.

Description

technical field [0001] The invention relates to the technical field of underground and underwater building foundation construction, in particular to the technical field of a steel sheet pile cofferdam structure and a construction method thereof. Background technique [0002] In water foundation construction, it is generally necessary to build a cofferdam project in order to carry out drainage excavation and foundation construction. The so-called cofferdam is to build a protective building around the foundation pit to separate the water so that the foundation pit can be excavated in the surrounding building and form dry construction conditions for foundation construction. It can also be said that the cofferdam is a temporary enclosure structure when building underground and water buildings. Build buildings. Except that the design stipulates that it is used as a permanent protective structure, it is generally dismantled after the pier body is repaired out of the water and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/04E02D27/14E02D27/52
Inventor 周翰斌陈衡荣劲松江和明陆广明陈日胜黄国忠
Owner THE FIRST ENG OF CCCC FOURTH HARBOR ENG
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