High-ground stress quasi-3D visible model testing bench frame apparatus

Abstract

The invention discloses a test bench device of quasi three-dimensional visualization models with high geostress and comprises a reaction wall device, a door-typed reaction frame is arranged in the side periphery of the reaction wall device, a hydraulic loading device is arranged between the door-typed reaction frame and a model body, and a plurality of observing windows are arranged surrounding the position of a perforated chamber on the reaction wall device. The test bench device can be used for implementing the experimental research on the geomechanical plane strain models in the stability research of underground engineered tunnels under high geostress condition. The test bench device has the following advantages: 1. a steel frame of the model adopts a high-intensity alloy steel material, thus having good intensity, rigidity and toughness, strong corrosion resistant capacity, and repeated and recycled use in a long time; 2. an external loading method is adopted, thus conveniently realizing jobs such as the installation and the replacing of loading equipment such as hydrostatic triggers, etc.; 3. a toughened glass is arranged surrounding a hole of the reaction wall, thus being convenient for observing the deformation and the crack propagation situation in the surrounding of the hole; 4. an assorted control system of hydraulic loading is combined, thus conveniently realizing graded loading and simulating real geostress distribution situation as accurately as possible.

Description

technical field [0001] The invention relates to a geomechanics model, in particular to a high ground stress quasi-three-dimensional visualization model test stand device. Background technique [0002] From the beginning of this century, some countries in Western Europe began to conduct structural model tests, and gradually established similar theories. In the 1960s, experts headed by E.Fumagalli pioneered the engineering geomechanics model test technology in the Italian Structural Model Test Institute, and the test research ranged from elasticity to plasticity to the final failure stage. Subsequently, countries such as Portugal, the former Soviet Union, France, Germany, the United Kingdom and Japan also carried out research in this area. In China, since the 1970s, Wuhan University, Tsinghua University, the Third Research Institute of the General Staff Engineering Corps, Southwest Jiaotong University, China University of Mining and Technology, Shandong University and other u...

AI Technical Summary

Problems solved by technology

The main problems are: the size of the model frame is fixed and cannot be adjusted according to the test scale; the closed rigid reinforcement frame makes it difficult to install and disassemble the model device

[0011] (1) It is difficult to realize the model test research of underground caverns under the condition of large buried depth and high ground stress

[0012] (2) The depth of the model is large, and the cavern cannot realize manual layered excavation, grouting and anchoring, installation of convergence measuring points, pre-tightening of anchor cables, etc.

[0013] (3) The cracking phenomenon and development process of the surrounding rock cannot be observed during the test

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