Construction method for deep foundation pit adjacent to subway

Abstract

The application discloses a construction method for a deep foundation pit adjacent to a subway, and relates to the technical field of foundation pit construction, and comprises the following steps: surveying the surrounding environmental conditions, engineering geological conditions and hydrogeological conditions of a region to be excavated to obtain comprehensive construction conditions of the region to be excavated; after a base pit excavation line is drawn, the region to be excavated is excavated; after the excavation is completed, a supporting device is used to support the side walls of the foundation pit; the supporting device is symmetrically arranged in the main body of the foundation pit and comprises two groups, which are used to support the side walls of the main body of the foundation pit; each group of the supporting device comprises a supporting plate used to support the side walls of the foundation pit; the supporting device further comprises a positioning plate used to abut against the bottom of the foundation pit; when the main body of the foundation pit is supported, the supporting plate is first installed to abut against the side walls of the foundation pit, so that the side walls are supported and reinforced; then, the positioning plate is installed to abut against the corresponding bottom of the side walls, so that the supporting plate is positioned and fixed, and the stability of the supporting plate is higher.

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