Shield Tunnel Segment Joint Waterproof Performance Test Device

Abstract

The invention relates to a test device of the waterproof performance of shield tunnel segment joints. The test device comprises a supporting frame, a segment longitudinal joint assembling self-balancing loading device, a segment annular joint assembling self-balancing loading device, an external water pressure applying device and a concrete lining segment model, wherein the segment longitudinal joint assembling self-balancing loading device is used for providing tensile force for segment longitudinal joint assembling simulation and comprises an oil cylinder jack base, an oil cylinder jack cross-pulling steel plate, a linkage steel plate, an oil cylinder jack bolt, a lug steel plate, a stressed steel pipe, a groove, a linkage steel plate connecting piece, a baffle and a convex plate; and the segment annular joint assembling self-balancing loading device is used for providing thrust for segment annular joint assembling simulation and comprises an oil cylinder jack reaction base, an oil cylinder jack dragging plate, a fixed base, a lower connecting steel arm and an upper connecting steel arm. According to the test device, segment assembly simulation can be realized, and a complicatedworking state of an elastic rubber sealing gasket in accordance with actual engineering is presented.

Description

technical field [0001] The invention belongs to the technical field of shield tunnel engineering, and in particular relates to a method for testing the waterproof performance of joints of shield tunnel segments. Background technique [0002] With the advancement of urbanization and rapid economic development, the use of underground space resources can effectively solve the crises of population, environment, and resources faced by cities. Therefore, the development of underground space has gradually become the mainstream trend of urban development. Since 1984, when the Shanghai Tunnel Engineering Company adopted the earth pressure balance shield for the first time in my country, the construction of tunnels using the shield method has gradually formed a relatively mature system of structural design calculation theory and engineering practice in my country. The understanding of waterproofing is still insufficient, and the degree of attention to tunnel waterproofing is relatively...

AI Technical Summary

Problems solved by technology

[0004] 1. In the actual work of segment joint waterproofing, the gasket is mainly pasted in the concrete sealing groove. In the above test device, the gasket is pasted in the steel sealing groove, resulting in a large deviation in the waterproof test structure of the gasket;

[0005] 2. The above test is only a local waterproof performance test of the elastic rubber gasket, and cannot fully simulate the complex working state of the gasket at the joint of the full-scale lining segment in the actual project;

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