An integral self-gravity waterproof steel casing for wet installation of prefabricated piers and abutments

Abstract

The invention discloses an integral type self-gravity water-stop steel pouring jacket for wet method installation of prefabricated piers and abutments. The integral type self-gravity water-stop steel pouring jacket for the wet method installation of the prefabricated piers and abutments comprises a pouring jacket of an integral structure, the pouring jacket is mounted on the prefabricated piers and abutments in an integral hoisting mode and forms an integral structure with a prefabricated bank pier, a large-scale floating crane is adopted to hoist the pouring jacket integrally, the pouring jacket is supported by a cast-in-situ bored pile steel casing, and the wet method installation of the prefabricated piers and abutments is achieved. An encircling type bracket is arranged on the inner wall of the pouring jacket, a circle of pressing beam surrounding the inner wall of the pouring jacket is fixed to the lower portion of the bracket, and a circle of rubber water stop surrounding the inner wall of the pouring jacket is mounted below the pressing beam. A plurality of inner supporting transverse rods are arranged between the inner wall of the pouring jacket and a prefabricated pier body. According to the integral type self-gravity water-stop steel pouring jacket for the wet method installation of the prefabricated piers and abutments, GINA rubber water stop is compressed through self gravity of the pouring jacket to stop water, and the pouring jacket is simple in structure, easy and convenient to assemble and disassemble, capable of being used repeatedly, short in construction duration and low in cost.

Description

technical field [0001] The invention relates to equipment for underwater installation and construction of prefabricated caps, in particular to an integral self-gravity water-tight steel casing for wet installation of prefabricated piers. Background technique [0002] The construction of cross-sea and river-crossing bridges is developing in the direction of large-scale, factory and assembly. In recent years, considering various factors such as construction period, standardized management, and environmental protection, the design concept of factory prefabrication and on-site installation is mostly adopted in the construction of bridge piers with non-navigable holes. At present, the on-site underwater installation of conventional bridge prefabricated caps mostly adopts large-diameter steel cylinder cofferdams, single and double-wall steel box cofferdams combined with large-volume bottom-sealing concrete waterstops, etc., to provide a water-free working environment for construct...

AI Technical Summary

Problems solved by technology

Since the size of the prefabricated piers is usually large, if a large-diameter steel cylinder cofferdam water-stop solution is adopted, the diameter of the steel cylinder will be more than 20m or even larger, and the requirements for the equipment for vibrating and pulling out of the steel cylinder are high, and the cost Expensive; on the other hand, the steel cylinder is easily deformed during the turnover process, and it needs to be repaired after repeated use, which is costly

For the single and double-wall steel cofferdam combined with large-volume back-sealing concrete water-stopping scheme, the construction method of cast-in-place caps is used. Although this scheme is highly mature, it is a resource-consuming construction method due to the use of pouring back-sealing concrete to achieve water-stopping. long, expensive

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