Multifunctional testing device for mechanical property of shield tunnel segment joint

Abstract

The invention relates to a multifunctional testing device for mechanical properties of shield tunnel segment joints. The multifunctional testing device comprises a frame structure, a first support base, a second support base, an X-direction loading actuator, a Y-direction outer-side loading actuator and a Y-direction inner-side loading actuator, wherein the first support base is fixedly arranged on the frame structure; the second support base is opposite to the first support base and can be moved; the X-direction loading actuator is in support connection with the second support base and the frame structure; the X-direction loading actuator is used for pushing the second support base to be matched with the first support base to tightly clamp a tunnel segment to be tested, and is used for exerting an X-direction loading force perpendicular to the cross section of the tunnel segment to be tested; the Y-direction outer-side loading actuator is mounted at the top of the frame structure andis used for exerting a Y-direction outer-side loading force perpendicular to the outer side surface of the tunnel segment to be tested; and the Y-direction inner-side loading actuator is mounted at the bottom of the frame structure and is used for exerting a Y-direction inner-side loading force perpendicular to the inner side surface of the tunnel segment to be tested. By adopting the testing device provided by the invention, mechanical testing on three modes of longitudinal joint bending, longitudinal joint shearing and annular joint shearing can be achieved, and relatively high utilization efficiency is also achieved.

Description

technical field [0001] The invention relates to the field of performance tests of shield tunnel segments, in particular to a multifunctional test device for the mechanical properties of joints of shield tunnel segments. Background technique [0002] In recent years, the technology of shield tunneling for long-distance water pipelines has developed rapidly. Compared with other shield tunnels, water conveyance tunnels have the characteristics of (high) internal water pressure and water hammer effect, and there are no ready-made specifications or standards yet. At present, in order to cooperate with the sponge city, a new form of water delivery tunnel has emerged in China. The model is: the tunnel is buried deep in the ground, and the inflow is adjusted and stored in the rainy season. When the tunnel is full, the confluence pumping station is used to pump rainwater into the river. The working mode of "combination of storage and discharge". This working mode will bring complex...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a multifunctional test device for the mechanical properties of the shield tunnel segment joints, which solves the problem that the existing test device cannot truly simulate the stress state of the actual segment and cannot apply internal water pressure , and bending and shearing tests require different devices, resulting in high cost and unnecessary waste

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