Pier-side bracket with double-wall steel boxed cofferdam as foundation and construction method

Abstract

The invention relates to the technical field of bridge construction, and discloses a pier-side bracket with a double-wall steel boxed cofferdam as a foundation and a construction method. The pier-side bracket comprises column feet, steel pipe piles, a connecting system, an attached wall and distribution beams, wherein the column feet are arranged along the double-wall steel boxed cofferdam and located at the top end of a bulkhead; the steel pipe piles are erected on the column feet; the connecting system is arranged between the adjacent steel pipe piles; the attached wall is arranged between the steel pipe piles and a pier; and the distribution beams are arranged at the tops of the steel pipe piles. The pier-side bracket has the following advantages and effects that the double-wall steel boxed cofferdam is directly used as the foundation, a driven pile or drilled pile foundation does not need to be arranged, stress is definite, the structure is stable and reliable, the construction risk is reduced, and the construction period is shortened; and the bracket does not need to be arranged to be inclined, so that an opposite-pulling structure with a complicated structure is omitted, and the construction cost is reduced.

Description

technical field [0001] The application relates to the technical field of bridge construction, in particular to a bracket around a pier based on a double-walled steel casing cofferdam and a construction method. Background technique [0002] At present, during the construction of bridge foundations in water, it is usually necessary to use double-wall steel casing cofferdams for water isolation and soil retention. The installation of the top beam section of the pier in water usually needs to set up the bracket beside the pier. In the current construction method, the bracket around the pier generally uses the cap as the foundation, or uses driven piles and bored piles as the foundation. [0003] In order to increase the span of the longitudinal bridge to the bracket next to the pier, the bracket next to the pier using the cap as the foundation generally has a certain slope. The wall-attached or double-tensioned structure uses a large amount of steel, the structure is quite comp...

AI Technical Summary

Problems solved by technology

[0003] In order to increase the span of the longitudinal bridge to the bracket next to the pier, the bracket next to the pier using the cap as the foundation generally has a certain slope. The wall-attached or double-tensioned structure uses a large amount of steel, the structure is quite complicated, and the safety performance is difficult to

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