Hanging bracket supporting system of side-span cast-in-place section and implementation method thereof

Abstract

Common methods of construction of side-span cast-in-place sections of long-span continuous bridges of bridge engineering can be summarized into a floor stand method, an attached support method, a hanging bracket method and the like. Due to the limits of terrain conditions, the overhang length and the carrying capacity of a cradle in the floor stand method, the attached support method, the cradle hanging bracket method, the length of a side-span cast-in-place section is often reduced to facilitate construction, and further the bridge structure is not reasonable. The invention provides a hanging bracket supporting system of a side-span cast-in-place section and an implementation method thereof, the hanging bracket supporting system of the side-span cast-in-place section and the implementation method thereof are free from the restrictive conditions of the terrain conditions, the overhang length and the carrying capacity of the cradle and are applicable to the construction of relatively long side-span cast-in-place sections. Besides, according to the hanging bracket supporting system of the side-span cast-in-place section and the implementation method thereof, the problems of small space and insufficient height between a bridge body of a cast-in-place section and a transitional pier are effectively solved, a supporting method of a hanging bracket between a cantilever end and a transitional pier top is provided, adverse effects of the cantilever end on the concrete of the side-span cast-in-place section due to circulating vibration of sunshine temperature differences can be avoided, construction quality control can be facilitated, the material utilization amount is small, and a feasible approach is provided for improvement on side-to-middle span ratio of bridges.

Description

technical field [0001] The invention relates to a construction method mainly used for long-span continuous bridges, in particular to a side-span cast-in-place hanger support system and an implementation method thereof, belonging to the field of bridge engineering. Background technique [0002] Long-span continuous bridges include continuous rigid frame bridges and continuous girder bridges constructed by cantilever casting method. The beam body of a long-span continuous bridge is divided according to the construction site, including the cast-in-place section at the pier top, the cast-in-place section, the side-span cast-in-place section and the closing section. The construction sequence is: first construct the cast-in-place section of the pier top, then install the hanging basket on the cast-in-place section of the pier top, construct the cantilever section with symmetrical cantilever, complete the construction of the side-span cantilever section before the construction of t...

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide a construction method for the side-span cast-in-place section of a large-span continuous bridge, which solves the problem of narrow space and insufficient height between the beam body of the cast-in-place section and the transition pier, and provides hangers between the cantilever end and the transition pier. The support method of the pier top overcomes the adverse effects of the cantilever end on the concrete of the cast-in-place section of the side span due to the cyclic deflection of the sunshine temperature difference

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