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Construction method of steel sheet pile cofferdam

A technology of steel sheet pile cofferdam and construction method, which is applied in basic structure engineering, protection devices, buildings, etc., can solve problems such as difficulty in eliminating the influence of ebb and flow on cofferdam construction, cofferdam deformation, and long period, and guarantees Consistent internal and external water levels, reducing the possibility of deformation, improving stability and force capacity

Inactive Publication Date: 2019-11-15
北京质诚捷讯水利工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, during the construction process of this technology, there are problems such as cofferdam deformation, long period, and high risk, and it is difficult to eliminate the influence of ebb and flow on cofferdam construction

Method used

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Embodiment Construction

[0066] A steel sheet pile cofferdam construction method disclosed in the present invention comprises the following construction steps:

[0067] S1: Preparations before construction; S2: Positioning measurement; S3: Guide frame construction; S4: Steel sheet pile construction; S5: Remove guide frame; S6: Internal support construction; Underwater bottom sealing construction; S9: cofferdam demolition.

[0068] Among them, S1 includes the following specific construction steps:

[0069] A1: Determine the structural parameters of the steel sheet pile according to the water level and geological conditions, determine the overall size of the steel sheet pile cofferdam according to the size of the cap and the required operating space, and reserve enough steel sheet piles;

[0070] A2: After the specifications of the steel sheet piles are determined, the prefabrication of the steel sheet piles begins. During the prefabrication, the same type of steel sheet piles are used, and the length ...

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Abstract

The invention relates to a construction method of a steel sheet pile cofferdam. The construction method comprises the following construction steps that S1, preparatory work before construction is conducted; S2, positioning and measuring are conducted; S3, a guiding frame is constructed; S4, steel sheet piles are constructed; S5, the guiding frame is demounted to provide a space for subsequent construction; S6, inner supports are constructed, specifically, hinged brackets are welded to grooves in the inner sides of the steel sheet piles to serve as a supporting platform, the inner supports arehoisted on the supporting platform, then the three sets of inner supports are sequentially and overall hung and mounted to the designed elevation through a hanging system from top to bottom, and in the hanging process, the hinged brackets are opened and thus embedded in the grooves in the inner sides of the steel sheet piles; S7, water pumping and mud suction are conducted, and a foundation pit isexcavated; S8, underwater bottom sealing construction is conducted; and S9, the cofferdam is demounted. The construction method has the advantages that the construction efficiency is improved, the possibility of deformation and the construction risk in the cofferdam construction process are lowered, and the influence of tidal fluctuation on cofferdam construction is avoided.

Description

technical field [0001] The invention relates to the technical field of cofferdam construction, in particular to a steel sheet pile cofferdam construction method. Background technique [0002] Cofferdam refers to the temporary enclosure structure built for the construction of permanent water conservancy facilities in the construction of water conservancy projects. Its function is to prevent water and soil from entering the construction site of the building, so as to drain water in the cofferdam, excavate the foundation pit, and build the building. Generally, it is mainly used in hydraulic construction. Except as a part of the formal building, the cofferdam is generally removed after use, and the height of the cofferdam is higher than the highest water level that may occur during the construction period. [0003] In bridge foundation construction, when bridge piers and abutment foundations are below the surface water level, various forms of earth weirs can be built according ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/04E02D31/06
CPCE02D19/04E02D31/06
Inventor 贾迺祎唐连合付佳王珊
Owner 北京质诚捷讯水利工程有限公司
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