Simulation test device and simulation test method for mechanical behavior characteristics of cross-fault tunnel roadway under different burial depths and different tectonic stresses

Abstract

The invention discloses a simulation test device and a simulation test method for mechanical behavior characteristics of a cross-fault tunnel roadway under different burial depths and different tectonic stresses. The simulation test device comprises a support frame, a loading hopper, a guide rail, a sliding block, a bidirectional power system and a confining pressure loading system. A confining pressure loading system for simulating overlying formation pressure and horizontal tectonic stress is provided for surrounding rock materials in a fixed hopper and a movable hopper. Meanwhile, a bidirectional power system, a guide rail and a sliding block are matched, so that the movable hopper can move in the horizontal direction and the longitudinal direction, complex engineering environment simulation of different burial depths, different tectonic stresses and fault composite diastrophism is achieved, and simulation of tunnel and roadway mechanical behavior characteristics in the environmentis achieved. According to the invention, the engineering actual situation can be restored more truly, the research accuracy of the mechanical behavior characteristics of the cross-fault tunnel roadwayunder the deep high ground stress condition is improved, and the problem that the existing physical model box cannot simulate the influence of the overlying stratum pressure and the tectonic stress on the tunnel roadway is solved.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering and tunnel engineering, and relates to a simulation test device and a test method for mechanical behavior characteristics of roadways of cross-fault tunnels under different buried depths and different structural stresses. Background technique [0002] With the development of my country's economy, railways and urban rail transit have developed rapidly, especially rail transit, as the main artery of the national economy, national important infrastructure and popular means of transportation, plays an important role in the development of the national economy and society. Constructing a modern rail transit equipment industry innovation system and creating a full industrial chain layout covering trunk railways, intercity railways, urban (suburban) railways, and urban rail transit is also one of the key points of the national strategic emerging industry development plan. Due to the geographical co...

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Problems solved by technology

[0006] In view of the deficiencies in the prior art, one of the purposes of the present invention is to provide a mechanical behavior characteristic simulation test device for cross-fault tunnel roadways under different buried depths and different structural stresses, so as to solve the problem that the existing tunnel mechanical behavior characteristic physical model box cannot simulate deep parts. Excavating the problem of the actual engineering conditions of high ground stress, to realize the simulation of the complex engineering environment of fault compound dislocation under different buried depths and different structural stresses, and to restore the actual engineering situation more truly. The second purpose of the present invention is to provide Based on the test device, it provides a test method for the mechanical behavior characteristics of the roadway of the cross-fault tunnel under different buried depths and different structural stresses.

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