Construction method of local roof reverse construction structure of subway station with relocation and modification of gravity flow pipe and culvert

Abstract

The present invention relates to a construction method for reverse construction of a local roof of a subway station for relocating and modifying gravity flow pipes and culverts. It is constructed in a rectangular foundation pit of the station, and a circle of reinforced concrete continuous walls is built around the perimeter. The interior is divided into A and B on the left, middle and right sides Area 1 and Area C, the gravity flow pipe culvert is relocated from Area C to Area B; Area A and Area B are separated by a longitudinal plain concrete wall, and Area B and Area C are separated by longitudinally arranged SMW enclosure piles Separation, the front and rear sides of area B are provided with horizontal row of SMW enclosure piles, the plain concrete wall on the left side of area B, the SMW enclosure piles on the right side and the SMW enclosure piles on the front and rear sides form a rectangular enclosure A crown beam is set on the top of the structure. The invention has simple construction procedures, reasonable construction method conversion, and simple structural system, and effectively builds a local station foundation pit enclosure system, realizes reverse construction of the roof in this area, permanent relocation of pipes and culverts, and safe construction of covering soil, avoiding secondary relocation , reducing engineering investment.

Description

technical field [0001] The invention belongs to the technical field of rail transit engineering, and in particular relates to a method for constructing a reverse construction structure of a partial roof of a subway station by relocating gravity flow pipes and culverts. Background technique [0002] The construction of subway stations is often accompanied by a large number of pipeline relocations. Wherein, the gravity flow pipe (culvert) is a kind of non-pressurized pipe (culvert) and only relies on the inclination gradient of the pipe itself to flow by gravity. If a large-scale temporary renovation or relocation is carried out, it is often necessary to add a mechanical pump to assist the pressurized flow to overcome the elevation resistance, and then relocate to the original position after the station is completed, and the construction period of a standard station is generally 24 More than a month, the cost of relocation is too high and the mechanical pump during the constr...

AI Technical Summary

Problems solved by technology

If a large-scale temporary renovation or relocation is carried out, it is often necessary to add a mechanical pump to assist the pressurized flow to overcome the elevation resistance, and then relocate to the original position after the station is completed, and the construction period of a standard station is generally 24 More than a month, the cost of relocation is too high, and the mechanical pump during the construction period will also cause reverse flow or overflow of the relocation pipe (culvert) due to mechanical failure

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