Shield tunnel pipe ring impermeability performance testing method with simulation of water and soil loading effects

Abstract

The invention relates to a shield tunnel pipe ring impermeability performance testing method with simulation of water and soil loading effects. Employed devices comprise a water pressure loading system, multiple hydraulic jacks 4 and a water bag 2 which is fixed to the outside of a pipe ring. According to each joint position of the pipe ring, multiple rows of holes 11 are arranged at the inner layer of the water bag. The testing method comprises a step of allowing the water bag 2 on the pipe ring, a step of arranging a bearing plate and a hydraulic jack, a step of allowing the water pressure loading system to inject water to each sub water bag of the water bag 2 through different water pipes 10, stopping water injection when a pressure water with a scale is filled with water with a certain depth, and recording a scale value at that time to be an initial reading, a step of controlling the hydraulic jacks 4 to add pressure to the water bag to simulate water and soil load borne by a shield tunnel, and recording a pressure water tank scale value in the time of maintaining the load, and a step of using a laser displacement sensor to measure the opening amount of a segment joint.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, and relates to a test device for the anti-seepage performance of shield tunnel pipe rings for simulating the action of water and soil loads. Background technique [0002] At present, most of the shield tunnel lining structure is assembled by prefabricated reinforced concrete segments and bolts. Due to the structural reasons of the tunnel lining structure, there are joints in the shield tunnel lining, and the shield tunnel joints are divided into longitudinal joints Under the influence of factors such as unfavorable geological conditions and surrounding engineering activities, the joints of shield tunnels may open and deform and dislocate. The investigation found that in most cases, water leaks into the tunnel through the longitudinal and annular joints. In addition to water seepage through the longitudinal and annular joints, there is also water leakage in the bolt holes. Water leakag...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a test device for the anti-seepage performance of shield tunnel pipe rings that simulates water and soil loads, through which the water seepage and pipe ring water seepage of shield tunnels under simulated water and soil loads can be measured. The opening amount of the sheet is used to solve the problem that the simulation test of the test device in the prior art does not conform to reality

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