Construction method of super-long steel sheet pile cofferdam in deep water under tidal environment

Abstract

The invention relates to a method for constructing a deep-water ultra-long steel plate pile cofferdam in a tide environment and belongs to the technical field of cofferdam construction. The construction method comprises the following steps of (1) after constructing a drilling pile of the cofferdam and detaching a drilling platform, inserting the steel sheet pile; (2) lifting a jack after the steel sheet pile is folded, lifting an inner support, and lifting a cushion to compact; (3) casting concrete, sealing the bottom by the concrete, and constructing a bearing table pier body; (4) re-filling fine sand in a clearance between a bearing platform and the steel sheet pile, and lifting a gasket beam on the top of a construction bearing platform; (5) opening a communication valve to introduce water into the cofferdam, and detaching supports in a first passage and a second passage to finish cofferdam construction of the steel sheet pile. The traditional construction process of the steel plate pile cofferdam is changed by the construction method, the application of the construction technology of the steel plate pile cofferdam is used to get rid of the stale and bring forth the fresh, and compared with the conventional construction method, the construction method provided by the invention has the characteristics of simple operation, easiness in precision control, short construction period and the like; due to the fact that the structure of the cofferdam is fixed, and the size of the inner supports can be determined, most of construction materials can be repeatedly used, and the construction cost is saved.

Description

technical field [0001] The invention relates to a steel sheet pile cofferdam construction method, which belongs to the technical field of cofferdam construction. 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 formal buildings, cofferdams are generally removed after use. 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 the bridge piers and abutment foundations are below the surface water level, various forms of earth weirs can be built according to l...

AI Technical Summary

Problems solved by technology

[0005] Considering various factors such as construction period, construction cost and precision control, it is difficult for conventional construction methods to adapt to the foundation construction problem in a deep water environment where the water level and tidal changes are obvious. Environmentally friendly and reusable construction methods to address this current challenge

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