Construction process of double-wall steel cofferdam for construction of pier bearing platform in main river water of Yellow River

Abstract

The invention discloses a construction process of a double-wall steel cofferdam for construction of a pier bearing platform in main river water of the Yellow River. The construction process comprises the following steps of: 1, determining the structure and the size of a cylindrical double-wall steel sleeve box used in the construction of the bearing platform in the water; 2, measuring and paying off; 3, performing cofferdam construction: gradually lowering the cylindrical double-wall steel sleeve box to a preset position by adopting hoisting equipment, and fixing the bottom of the cylindrical double-wall steel sleeve box lowered in place by adopting a supporting fixer; 4, sealing the bottom; 5, constructing drilled piles at the bottom of the bearing platform; 6, gradually pumping water, performing underwater digging, and gradually cutting a steel protecting canister; 7, constructing the bearing platform; and 8, constructing pier columns on the upper part of the bearing platform. The process is reasonable in construction step design, convenient in construction, low in construction cost and short in construction period; and integrated construction of the bearing platform and the drilled piles is realized, meanwhile, the sinking operation of the double-wall steel sleeve box can be simply, conveniently and efficiently finished with high quality, and multiple defects in the construction of the conventional double-wall steel sleeve box cofferdam are overcome.

Description

technical field [0001] The invention belongs to the technical field of cap platform construction in the Yellow River channel, and in particular relates to a double-wall steel cofferdam construction process for the construction of pier cap platforms in the main channel of the Yellow River. Background technique [0002] With the rapid growth of our country's economy and the continuous increase of national infrastructure, the strategy of "replacing ships with bridges" will be implemented, that is, all pontoon bridges on the Yellow River will be replaced by the Yellow River Bridge. However, in the middle and upper reaches of the Yellow River in my country, there is a flood season in the Yellow River, and the floodplain area is very large. The design scheme of the steel sheet pile cofferdam and the underwater foundation cleaning method can be applied to the construction of the bridge in the middle and upper reaches of the Yellow River. The existing underwater pier cap constructio...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a double-wall steel cofferdam construction process for the construction of pier caps in the water of the main river of the Yellow River in view of the above-mentioned deficiencies in the prior art. The construction steps are reasonable in design, convenient in construction, and low in construction cost

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