A bottomless steel casing cast-in-place concrete diversion cofferdam and its construction method

Abstract

The invention relates to the technical field of construction of diversion cofferdams, in particular to a cast-in-place concrete diversion cofferdam with non-bottom steel sleeve boxes and a construction method thereof. The cast-in-place concrete diversion cofferdam comprises the steel sleeve boxes with the lower ends fixed to the upper end face of a flat foundation bed of a river bed. Each steel sleeve box is of an annular structure with the upper and lower ends open, concrete is poured into each steel sleeve box to form a diversion cofferdam structure, and a vertically arranged steel pipe is pre-buried in each steel sleeve box. An anchor rod penetrates through each steel pipe and is fixedly connected with the steel pipe. The lower end of each anchor rod goes deep into the foundation bed and the river bed to anchor the corresponding steel sleeve box on the river bed, and each anchor rod is fixedly connected with the corresponding steel pipe. The non-bottom steel sleeve boxes are laid on the flat foundation bed overall, the solid concrete is poured into the steel sleeve boxes, rock is drilled via holes formed by the pre-buried anchor rods, and the anti-flushing anchor rods are arranged, so that the cast-in-place concrete structures of the non-bottom steel sleeve boxes are effectively anchored to bed rock of the river bed, and the anti-flushing capacity of the cast-in-place concrete structures of the non-bottom steel sleeve boxes is improved.

Description

Technical field [0001] The invention relates to the technical field of construction of diversion cofferdams, in particular to a bottomless steel box cast-in-place concrete diversion cofferdam and a construction method thereof. Background technique [0002] The diversion structure is an important part of a water conservancy project, and its structure affects the construction of the entire water conservancy project. Moreover, in recent years, with the vigorous development of inland water transport operations, a large number of domestic water conservancy projects built in the 1950s and 1960s need to be modified and protected. How to build suitable diversion cofferdams to maintain and reform existing water conservancy projects? It is especially important. [0003] The diversion cofferdams in the prior art are generally earth-rock cofferdams, and the earth-rock diversion cofferdams are directly filled in the water to form the earth-rock diversion cofferdam. Such a construction method i...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing earth-rock cofferdams are difficult to build and easy to collapse in rivers with turbulent water flow mentioned in the above-mentioned background technology, and provide a bottomless steel casing cast-in-situ concrete diversion cofferdam and its construction method

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