A tunnel excavation simulation device under non-uniform lateral load

Abstract

The invention discloses a tunnel excavation simulation device under non-uniform lateral load, which includes a restraint structure, the restraint structure is used to fix the sample, and the sample is fixed inside the restraint structure; the pressurization system includes first and second pressurization Pressure system, the first pressure system and the second pressure system are symmetrically arranged on the left and right sides of the sample, and the first or second pressure system is used to provide a uniform load; the first or second pressure system and the sample Each is provided with a load conversion system, the load conversion system is used to convert the uniform load of the first pressurization system or the second pressurization system into a non-uniform load; the present invention passes through the first pressurization system or the second pressurization system A load conversion system is set between the sample and the uniform load applied by the pressurization system into a non-uniform load, which reduces the gradient of the non-uniform load and better simulates the actual stress state of the rock mass during tunnel excavation, ensuring The accuracy of the test data provides more reliable theoretical support for the actual construction.

Description

technical field [0001] The invention relates to the technical field of tunnel excavation model tests, in particular to a tunnel excavation simulation device under non-uniform lateral load. Background technique [0002] With the rapid development of highway engineering, highway construction in mountainous areas has become the general trend of transportation network development; therefore, the stability of surrounding rock after tunnel excavation has become a major subject, and its indoor model tests are mainly based on uniform lateral loads. , Two-way and three-way loading have been realized, and the pressurization method is mainly hydraulic, which realizes the simulation of the surrounding rock deformation and stress changes caused by tunnel excavation, and guides the tunnel construction. [0003] In order to further simulate the actual stress condition of the tunnel, the lateral uniform load of the model is transformed into a trapezoidal or triangular load; at present, mult...

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Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, the purpose of the present invention is to provide a tunnel excavation simulation device under non-uniform lateral loads to solve the problem that the step-like load applied in the prior art has a large gradient and the test data is questionable. big technical problem

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