Temporary wall protection column for guaranteeing safety of extension foundation pit and construction method thereof

Abstract

The invention particularly relates to a temporary wall protection column for guaranteeing safety of an extension foundation pit and a construction method thereof. The construction method is characterized by comprising the following steps of: performing earth excavation to a position which is 1m below the first floor underground; constructing wall protection columns, a crown beam and a first waistbeam; performing earth excavation to a position which is 1m below the second floor underground; constructing residual wall protection columns, a second waist beam and a supporting beam; performing earth excavation to the bottom of the foundation pit in layers and sections; constructing a basement structure to the second floor underground, constructing a supporting plate at a foundation and the floor, filling backfill materials between the basement and a supporting pile, and disassembling a second support; constructing a basement structure to the first floor underground, filling the backfill materials between the basement and the supporting pile, disassembling a first support, and continuing to construct the basement structure to the ground; redundant bracing systems between an original building and a new building are disassembled and the structure of the original building is communicated with the structure of the new building. The wall protection column and the construction method thereof have the advantages of high economic benefits and capability of effectively guaranteeing the safety of the foundation pit bracing systems.

Description

technical field [0001] The invention relates to the field of expansion of existing buildings, in particular to a temporary pilaster for ensuring the safety of an expanded foundation pit and a construction method thereof. Background technique [0002] With the rapid development of society today, in order to recover funds as soon as possible during the construction of urban buildings, many buildings choose phased construction. The advantage of phased construction is that it can quickly withdraw funds and reduce the risk of capital chain disconnection, but it puts forward higher requirements for construction technology. , especially in the foundation pit support, since some areas have been constructed, a closed support system cannot be formed, and there is a great risk in forcibly connecting the constructed and unconstructed areas. Contents of the invention [0003] The purpose of the present invention is to overcome the defects of the above-mentioned construction method and ...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of society today, in order to recover funds as soon as possible during the construction of urban buildings, many buildings choose phased construction. The advantage of phased construction is that it can quickly withdraw funds and reduce the risk of capital chain disconnection, but it puts forward higher requirements for construction technology. , especially in the foundation pit support, because some areas have been constructed, it is impossible to form a closed support system, and there is a great risk in forcibly connecting the constructed and unconstructed areas