Waterproof and drainage system of shield tunnel with secondary lining

Abstract

A waterproof and drainage system of a shield tunnel with a secondary lining aims to effectively improve the waterproof and drainage performance of the shield tunnel with the secondary lining and achieve scientization and systematization of the waterproof and drainage design. An interlayer waterproof and drainage structure comprises annular blind pipes arranged between a segmental lining and the secondary lining, longitudinal blind pipes arranged between the segmental lining and a tunnel bottom filling layer, and longitudinal ditches formed in the two transverse sides of the tunnel bottom filling layer. The annular blind pipes arranged at intervals in the longitudinal direction are located outside an annular splicing seam of the segmental lining. The longitudinal blind pipes arranged at intervals in the annular direction are located outside a longitudinal splicing seam of the segmental lining. The two ends of each longitudinal blind pipe communicate with the two corresponding adjacent annular blind pipes. The lower ends of the annular blind pipes are connected into the longitudinal ditches.

Description

technical field [0001] The invention relates to tunnel engineering, in particular to a waterproof and drainage system for a shield tunnel with secondary lining. Background technique [0002] With the rapid development of the country's transportation industry, shield tunnels have developed rapidly in industries such as subways, railways, and highways due to their characteristics of non-excavation, fast construction speed, and low labor intensity. [0003] Usually, shield tunnels only have one layer of segment lining, relying on measures such as concrete self-waterproofing, joint gasket waterproofing and caulking to isolate groundwater. In the actual use process, it often happens that the vehicle runs out of control and hits the lining, and the tunnel fire causes the lining structure to deteriorate. The single-layer segment lining cannot meet the century-old service requirements of the tunnel. On the other hand, the gasket used for the waterproofing of segment joints is made ...

AI Technical Summary

Problems solved by technology

In the actual use process, it often occurs that the vehicle runs out of control and hits the lining, and the tunnel fire causes the lining structure to deteriorate. The single-layer segment lining cannot meet the century-old service requirements of the tunnel.

On the other hand, the gasket used for the waterproofing of segment joints is made of rubber, which has problems of aging and stress relaxation, and the segment will open in the wrong position during tunnel use, which seriously weakens the waterproof ability of the gasket

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