Deepwater single-wall steel overhead bin cofferdam and construction method thereof

Abstract

The invention relates to a deepwater single-wall steel overhead bin cofferdam and a construction method thereof. The steel overhead bin comprises an enclosure system, an inner supporting system and a bearing and hanging system, wherein the bearing and hoisting system comprises a hoisting bracket, an upper beam, a lower beam and a hoisting rod; the hoisting bracket is welded at the inner side of aside plate; the upper beam is located on the top surface of a longitudinal steel protection drum and connected with the hoisting bracket through the hoisting rod; and the lower beam is welded at a pile top position and is in parallel with the upper beam. In the construction process, the steel overhead bin is integrally sunk through a hoist; two bearing and hoisting beams are arranged, wherein thefirst bearing and hoisting beam is arranged on the steel protection drum, and the second bearing and hoisting beam is arranged at the pile top; and secondary bottom sealing is adopted to carry out deepwater cofferdam construction on a foundation pit. The invention solves the technical problem that the traditional cofferdam bottom sealing concrete quality is difficult to guarantee and easy to seepand leak water, and can be widely applied to the construction of deepwater pile bearing platforms and bridge piers.

Description

technical field [0001] The invention relates to a cofferdam and a construction method thereof, in particular to a single-wall steel suspension box cofferdam suitable for use in deep water areas and a construction method thereof. Background technique [0002] In the construction of deep water foundation cofferdam in silty clay layer, the traditional method is to use Larsen steel sheet pile cofferdam or steel hanging box cofferdam construction. It is difficult to guarantee that the construction of steel sheet piles is prone to water seepage and water leakage, which will affect the follow-up construction and other shortcomings. Ordinary steel hanging box cofferdams have a relatively large lifting load during the cofferdam sinking process in deep water areas, which is unfavorable for construction and control and often needs to be adjusted with a jack. The construction is difficult and the progress of the project is slow. At the same time, the bottom of the steel hanging box is ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a deep-water single-wall steel hanging box cofferdam and its construction method, to solve the technical problems that the traditional steel hanging box needs to be adjusted by jacks during the sinking process, the construction is difficult, and the project progress is slow; and solve The problem that a crane is still needed after the steel hanging box sinks to a suitable position

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