Combined construction method for road bridge

Abstract

The invention discloses a combined construction method for a road bridge, which comprises the following steps: S1, drilling a pile: after geological exploration and selection are carried out according to the construction position of a bridge, a pile casing is buried in a soil layer by adopting a corresponding rotary drilling rig and a circulating drilling rig, prepared slurry is used in a drilled hole, the drilling process comprises two steps of centering and drilling, and the drilling process comprises two steps of centering and drilling; wherein the slurry is used for the drilling step, finally, a drilled hole is cleared and checked, then the prepared reinforcement cage is put into the drilled hole, and concrete is poured and formed. During construction, the foundation bearing capacity of the widening bridge is improved, and the pile foundation bearing capacity of the widening bridge is improved by adopting a cast-in-place pile post-grouting technology; the integral cast-in-place layer is arranged at the splicing seam between the existing bridge superstructure and the widened bridge superstructure, so that the settlement of the newly-built widened bridge can be effectively reduced, and the pavement settlement difference of the road bridge is reduced.

Description

technical field [0001] The invention relates to the technical field of bridges, in particular to a combined construction method for roads and bridges. Background technique [0002] With the development of my country's highway transportation, most of the roads and bridges built in the early years can no longer meet the increasing demand of traffic volume. Therefore, it is necessary to renovate and expand the original roads and bridges to improve the traffic capacity to meet the growing transportation demand. [0003] In the initial stage of opening to traffic, new bridges often have large settlements, resulting in a large settlement difference with the bridge deck, which will cause bridge deck cracks and affect driving comfort. Therefore, how to take effective measures to reduce the settlement difference between bridges has become the key to the problem. [0004] After the bridge deck of the new bridge has settled, a staggered platform is formed between the two decks, which ...

AI Technical Summary

Problems solved by technology

[0004] After the bridge deck of the new bridge settles, a staggered platform is formed between the two decks, which affects driving safety. When the bridge settlement difference is large, a large additional internal force will be generated, which will affect the structural safety.