Test device for cavern body excavation model

Abstract

The invention discloses a test device for a cavern body excavation model. The test device comprises a base, a sample arrangement mechanism, a test system and at least one upper computer. The sample arrangement mechanism is composed of stand columns vertically and fixedly connected with the base, pressure plates inserted between the stand columns and forming a cuboid cavity, and a pressure device or a counter-force device arranged on the outer sides of the pressure plates. The testing system comprises a steel wire pressure box and a resistance strain gauge which are arranged on a pre-excavatedsection; an upper computer used for receiving output signals of the steel wire pressure box and the resistance strain gauge, and the upper computer forms cavern body excavation stress and strain dataaccording to data changes generated by the steel wire pressure box and the resistance strain gauge. According to the device, chamber excavation of various section forms can be carried out in rock-soilbodies with different properties by adopting different construction methods, so that a reasonable, safe and efficient construction method can be selected in chamber excavation of rock-soil bodies with different properties.

Description

technical field [0001] The invention belongs to the technical field of engineering construction design, and in particular relates to a model test device for excavating a cave body. Background technique [0002] With the rapid development of our country's economy, the number of excavation chambers is increasing day by day. In the field of transportation, the construction of a large number of special long, deep-buried and complex geological conditions tunnels in the central and western regions of my country; in the field of water conservancy and hydropower, the construction of large-span hydraulic tunnels and underground workshops with large The construction of underground mine tunnels in the mining of mineral deposits; in the field of municipal construction, the construction of deep subway tunnels and underground three-dimensional transportation hubs; in the field of waste disposal, the construction of underground laboratories for radiation protection and underground disposal ...

AI Technical Summary

Problems solved by technology

[0005] At present, no matter what kind of monitoring tool is used to monitor the surrounding rock stress, it will cause secondary disturbance to the surrounding rock, and the stress and strain monitoring methods of the surrounding rock of the cavern cannot completely monitor the stress, stress and strain of the surrounding rock of the cavern under different excavation methods. The process of strain readjusting until a new equilibrium is reached

Existing chamber surrounding rock stress and strain monitoring model test devices can not effectively simulate the real stress conditions of rock and soil, especially chamber excavation under complex stress conditions

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