Foundation pit supporting structure for bridge main pier bearing platform on riverway abrupt slope bed rock and construction method of foundation pit supporting structure

Abstract

The invention discloses a foundation pit supporting structure for a bridge main pier bearing platform on riverway abrupt slope bed rock and a construction method of the foundation pit supporting structure. The foundation pit supporting structure comprises a cofferdam built island. The foundation pit supporting structure is characterized in that a steel sheet pile water stop curtain is arranged on the side, close to a riverway channel, of the cofferdam built island and is composed of multiple steel sheet piles arranged vertically side by side; the lateral sides of the adjacent steel sheet piles are engaged to form the water stop curtain; a construction road composed of an annular gravel soil layer is arranged on the side, back on to the channel, of the steel plate pile water stop curtain; and the plane of the construction road is lower than the top face of the steel sheet pile water stop curtain, and annular reinforced concrete arch rings are arranged on the side, back on to the channel, of the construction road. Water stop and waterproofness of a foundation pit are effectively achieved, and excavation construction of the deep foundation pit of the bearing platform in water and smooth construction of the bearing platform are guaranteed; and the construction progress and quality are improved while the safety of the foundation pit is guaranteed, and the construction cost is reduced.

Description

technical field [0001] The invention relates to a foundation pit support structure for building a bridge main pier cap on a steep river slope bedrock, in particular to a foundation pit support structure for building a bridge main pier cap on a river steep slope bedrock and a construction method thereof. Background technique [0002] In the construction of large-scale bridges in the field, it is often encountered in the construction of large-scale bridge projects across rivers and rivers. The large-scale bridges have many main piers, and different main pier caps will be built in different positions, facing different geographical locations and terrains. characteristics and geological structure. For example, when the main pier caps of bridges crossing rivers and rivers are constructed, some of the main pier caps will be built on the coasts across rivers and rivers. The coastal positions are sometimes steep bedrock, and the soil and rock layers are The slope tends to be downwar...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the defects of the prior art, to provide a foundation pit support structure for building the cap of the main pier of a bridge on the bedrock of the steep slope of the river, and specifically to provide a support structure for the cap of the main pier of the bridge on the bedrock of the steep slope of the river. The foundation pit supporting structure and construction method thereof, the technical problem that the present invention solves is to construct the foundation pit supporting structure of the main pier of the bridge on the steep slope bedrock of the river course with complex topographic characteristics and geological and hydrological structures, and effectively realize the foundation pit support structure. Water and waterproof, to ensure the smooth construction of the deep foundation pit excavation of the submerged cap and the cap part, to ensure the safety of the foundation pit, improve the construction progress and quality, and reduce the construction cost

Images