Pipe gallery subarea excavation method for guaranteeing half-width passing of existing road

Abstract

The invention provides a pipe gallery subarea excavation method capable of guaranteeing half-width passing of an existing road, belongs to the technical field of geotechnical engineering design and construction, is applied to underneath passing of existing road nodes of a comprehensive pipe gallery, and can guarantee the half-width road passing requirement during construction of a foundation pit of the pipe gallery. The method comprises the steps of firstly, dividing a construction area into a first excavated area and a later excavated area by a middle partition wall; then excavating the firstexcavated area and constructing a support, and allowing vehicles to pass through the later excavated area at the moment; excavating the first excavated area to the bottom of the pit, constructing a pipe gallery structure, and constructing a plain concrete force transmission belt; then constructing a pipe gallery top plate in the first excavated area, arranging a retaining wall, covering soil behind the wall body, compacting, and carrying out pavement construction; then turning over to the first excavated area for vehicle passing, excavating the later excavated area, and constructing a support; then excavating the later excavated area to the bottom of the pit, constructing a pipe gallery structure, chiseling off a plain concrete force transmission belt and butting with a constructed structure; finally, after the integral strength of the pipe gallery structure is formed, constructing road surface soil covering and being open to traffic for completing construction.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering design and construction, in particular to a divisional excavation method for a pipe gallery that ensures half-width passage of existing roads. Background technique [0002] The comprehensive pipe gallery is a new type of municipal infrastructure built underground to accommodate two or more types of urban engineering pipelines. It can make more reasonable and effective use of the underground space of the road, and at the same time avoid repeated excavation of the road surface due to burying or repairing pipelines . Therefore, the plane planning of the comprehensive utility corridor is mostly selected in the central area of ​​the city with heavy traffic or in the emerging industrial area and urban area with high functional positioning and important location. [0003] For the excavation construction of the underground pipe gallery under the unbuilt road or under the wide green belt,...

AI Technical Summary

Problems solved by technology

In general projects, for cost economy and construction convenience, the open cut method is often adopted, but this method will interrupt the existing road traffic for a long time, and the pipeline within the excavation range needs to be cut and modified. Affect the normal travel and life of residents, and the requirements for underground obstacle clearance are high, resulting in a waste of social resources

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