Method for supporting foundation pit next to established underground structure

Abstract

The invention discloses a method for supporting a foundation pit next to an established underground structure. The method is characterized in that one end of a supporting member of the foundation pit built after underground structure establishment is supported on a vertical or horizontal member of an established body structure, supporting axial force is directly transferred to the member of the established body structure, one end of the supporting member can be supported on the established body structure by changing supporting after the foundation pit built after underground structure establishment is excavated to the pit bottom, and then base plate water-proof layer and reinforced concrete base plate construction, side wall water-proof layer and reinforced concrete side wall construction and top plate reinforced concrete and water-proof layer construction are sequentially performed. The method has the advantages that on the premise that engineering construction, operation safety and engineering quality are ensured, the engineering construction is simple, quick and convenient, construction risk is reduced, construction joints and construction processes are decreased, a construction period is shortened, and the construction cost is reduced.

Description

technical field [0001] The invention relates to foundation pit support of underground structures, in particular to a foundation pit support method adjacent to built underground structures. Background technique [0002] As the pace of urbanization continues to move forward and the development of cities is getting faster and faster, the development of underground space will surely occupy an important position in urban construction. For the foundation pit support system of the post-construction underground structure that is close to the post-construction underground structure, due to the existence of the enclosure structure between the post-construction underground structure and the pre-construction underground structure, the two are separated. If it is required to integrate the built underground structure and the post-built underground structure to form a continuous outsourcing waterproof layer, there will be such a problem: how to chisel out the enclosure structure between th...

AI Technical Summary

Problems solved by technology

If it is required to integrate the built underground structure and the post-built underground structure to form a continuous outsourcing waterproof layer, there will be such a problem: how to chisel out the enclosure structure between the two to ensure that the two structures are integrated and implement continuous outsourcing Waterproof layer

One of the problems with this method is that the main structure of the post-construction section forms multiple construction joints; the second problem is that chiseling off the bottom of the enclosure structure causes the upper part of the enclosure structure to be suspended in the air and is unstable, and the construction risk is high, which is not conducive to safe construction

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