Double-wall cofferdam structure for water conservancy and hydropower engineering

Abstract

The invention relates to the technical field of water conservancy and hydropower engineering, and discloses a double-wall cofferdam structure for water conservancy and hydropower engineering. The double-wall cofferdam structure comprises four wall bodies, a square cofferdam is formed by enclosing the four wall bodies, a main connecting block is mounted on one end surface of each wall body, and a main connecting groove is formed in the other end surface of each wall body. Outer clamping grooves are formed in the sides, close to the main connecting grooves and the main connecting blocks, of theouter side faces of the two ends of the wall bodies, and a plurality of inner supporting clamping seats are distributed on the sides, close to the main connecting grooves and the main connecting blocks, of the inner side faces of the two ends of the wall bodies from top to bottom at equal intervals. A plurality of cross-shaped inner supporting columns are distributed on the inner sides of the wallbodies from bottom to top, and two groups of hydraulic cylinders are arranged in parallel, located on the outer side surface of a steel casing, at the upper ends and the lower ends of the inner corners of the wall bodies. The multiple wall bodies are spliced in an assembled mode, transportation, mounting and splicing are easy and convenient, the safety coefficient is high, the sealing performanceand firmness of a square cofferdam are ensured, the wall body mounting accuracy is further improved, and the cofferdam deviation adjusting difficulty is reduced.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a double-wall cofferdam structure used in water conservancy and hydropower engineering. Background technique [0002] The double-wall steel cofferdam is welded by the inner and outer steel shells stiffened by vertical angle steel and several layers of circular horizontal trusses. There are also more and more structural projects in the water. Due to the influence of natural conditions and land use restrictions, there are more and more construction techniques at the dry part of the double-wall steel cofferdam; [0003] However, in the existing bridge foundation construction, large deep-water cofferdams face many difficulties when sinking, especially when the cofferdams sink in place, the position is inconsistent with the design positioning and needs to be adjusted. However, for large double-walled cofferdams, due to the structural It is huge, a...

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Problems solved by technology

[0003] However, in the existing bridge foundation construction, large deep-water cofferdams face many difficulties when sinking, especially when the cofferdams sink in place, the position is inconsistent with the design positioning and needs to be adjusted. However, for large double-walled cofferdams, due to the structural It is huge, and there are many and complicated underwater influencing factors, which will lead to cumbersome adjustment of the position, and it is impossible to remind the deviation of the position when the double-walled cofferdam is lowered, which will bring a lot of inconvenience to the later position adjustment, and the existing technology Among them, the overall assembly and lowering technology of the double-wall cofferdam, due to its large size and self-weight, requires high overall coordination of the hanger and is difficult to operate

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