Shield tunnel segment longitudinal seam impervious performance test system

Abstract

The invention provides a shield tunnel segment longitudinal seam impervious performance test system comprising two circular arc-shaped test segments and a water pressure loading system. The two test segments are butted along a circular arc direction and are connected together by a connecting bolt, and one of the test segments is provided with a water injection hole channel which is connected with the water pressure loading system. The two butted test segments are supported on two supports in an arched shape, and at least one support is connected with an X-direction loading actuator. A Y-direction loading actuator is also arranged above the two test segments. A load of horizontal direction and a load of vertical direction can be applied to the segment test members by the X-direction loading actuator and the Y-direction loading actuator so that the segments are enabled to generate certain dislocation and deformation amount, and thus the water permeation property of segment longitudinal seams under the actual working conditions can be simulated.

Description

technical field [0001] The invention relates to a test system for anti-seepage performance of longitudinal joints of shield tunnel segments. Background technique [0002] With the steady advancement of a new round of urbanization in my country, urban rail transit has become an important way to expand the physical space of the city and facilitate the travel of the people. As the core of the urban rail transit system, a large number of shield construction methods are used for the interval tunnels. At present, the shield tunnel lining structure is mostly made of prefabricated reinforced concrete segments spliced ​​by connecting bolts. Due to the structural characteristics of the segment joints, the joint stiffness and bearing capacity are far lower than the stiffness and bearing capacity of the segment itself. The weak link of the joint force, especially in the strata with a small lateral pressure coefficient such as silty soft soil, is prone to large joint corner deformation,...

AI Technical Summary

Problems solved by technology

[0013] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a shield tunnel segment longitudinal joint anti-seepage performance test system, which can simulate the seam opening of the shield tunnel segment longitudinal joint under stress A test device for deformation and water seepage characteristics, which is used to solve the defect that the simulation test of the test device in the prior art does not conform to the actual situation

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