Bottomless double-wall steel box assembly structure

Abstract

The invention discloses a bottomless double-wall steel cover box assembling structure. The structure comprises two first double-wall plates, two second double-wall plates and supporting rods; the first double-wall plates, the second double-wall plates and the supporting rods are fixedly connected to form a rectangular box body; the supporting rods are supported on the inner side of the rectangular box body and are in cross intersection; each of the first double-wall plates and the second double-wall plates comprises at least two vertical box beams and a double-wall plate body; the first double-wall plates and the second double-wall plates are perpendicularly and fixedly connected through a plurality of connecting plates which are in bridging joint with side plates of two adjacent vertical box beams and are perpendicularly arranged in a spaced mode; pieces of water retaining structural steel are perpendicularly fixed to the four corners of the inner side of the rectangular box body respectively; the right angles of the water retaining structural steel are aligned with vertical joint seams of the first double-wall plates and the second double-wall plates. The bottomless double-wall steel cover box assembling structure is simple in structure and can be quietly conveniently assembled to form a bottomless double-wall steel cover box. A full-weld welding joint acted by shear force in the prior art is changed into local connecting welding joints formed by pull action of the connecting plates which are perpendicularly arranged in the spaced mode, the first double-wall plates and the second double-wall plates. The stress state of the connecting welding joints of the bottomless double-wall steel cover box is greatly improved, and the use reliability of the bottomless double-wall steel cover box is improved.

Description

technical field [0001] The invention relates to a steel cofferdam device for the construction of a water engineering structure, in particular to a bottomless steel casing used for the construction of a super-large bridge deep-water cap platform with a water depth of less than 10m, and belongs to the technical field of hydraulic engineering. Background technique [0002] The building base elevation of super-large bridge deep-water caps is below the water surface line, and steel casings enclosed on all sides are generally used for enclosure during construction. In order to create dry construction conditions in the steel box, after the steel box is in place, underwater concrete is used to seal the bottom of the steel box, and then the water in the steel box is drained before underwater construction. The existing bottomless steel box assembly mainly adopts the following two methods: [0003] 1. Four pieces of double-wall panels are spliced ​​into a steel box by means of full-we...

AI Technical Summary

Problems solved by technology

Due to the long vertical seam of the steel casing, in order to ensure the splicing strength of the steel casing, it is necessary to use a large number of high-strength bolts and nuts to connect four double-wall panels. The positional tolerance accuracy of the overlapping connection holes of the wall plate is very high, which increases the processing cost; the bolts and nuts of the steel box are corroded after long-term use, and cannot be disassembled directly. They can only be disassembled by underwater cutting, which has low efficiency and high construction costs; The monolithic structure of the steel box after cutting is deformed, which affects the reuse

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