Construction method for foundation pit adjacent to underground structure

Abstract

The invention relates to the technical field of building construction, in particular to an adjacent underground structure foundation pit construction method which comprises the following steps that S1, a tunnel is pre-reinforced; s2, a pipe shed is built within the 180-degree range of the tunnel top arch; s3, according to the distance between the foundation pit and the tunnel, the foundation pit is partitioned from far to near in the transverse direction, the area, far away from the tunnel, of the foundation pit is constructed firstly, and then the area, close to the tunnel, of the foundation pit is constructed; and when the area, close to the tunnel, of the foundation pit is constructed, the area, close to the tunnel, of the foundation pit is segmented in the longitudinal direction, and the construction sequence is that the middle segment is firstly constructed in the longitudinal direction, and then the segments on the two sides are sequentially constructed. According to the foundation pit construction method, a comprehensive protection system is formed through tunnel pre-reinforcement, pipe shed building and partitioned and segmented construction, and the construction safety is greatly improved.

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