Surrounding rock stability and support model test system for deep tunnels under complex conditions

Abstract

The invention discloses a model test system for surrounding rock stability and support of large buried deep tunnels under complicated conditions. It consists of a pressure loading system, a micro TBM intelligent tunneling system, a dobby lining system and a self-sealing high-precision testing system. The high-pressure water-sealed model test cabin is used to accommodate the test model body and high-pressure water body. The built-in high hydraulic servo loading system provides high ground stress for the test model body. The high ground temperature control system applies high ground temperature to the test model body. High permeability water pressure loading system It is used for all-round high-permeability water pressure loading on the test model body. The TBM intelligent excavation system can intelligently excavate model caverns of different shapes and sizes. The multi-arm lining system is used for lining support and Grouting reinforcement, self-sealing high-precision testing system is used to test the displacement, stress and seepage pressure of any part inside the model test body.

Description

technical field [0001] The invention relates to a true three-dimensional model test system used in the fields of hydropower, transportation, energy and mine engineering for simulating the stability of surrounding rock and support control of deep tunnels under complex multi-field coupling conditions. Background technique [0002] With the rapid development of society and economy, China has developed into a country with the largest number of tunnels and underground projects in the world, the largest scale, the most complex geological conditions, and the most diverse structural forms. In recent years, the construction of deep caverns such as China's hydropower diversion tunnels, traffic tunnels, and mine roadways has developed vigorously, and the focus of construction has shifted to the western mountainous areas and karst areas with complex geological conditions. High ground stress, high seepage pressure, strong karst, and complex geological structures have caused Disasters fre...

AI Technical Summary

Problems solved by technology

[0013] (1) Model tests are mostly plane and quasi-three-dimensional loading, which cannot simulate the true three-dimensional loading process of high ground stress under multi-field coupling;

[0014] (2) It is impossible to simulate the stability and support control of surrounding rock in deep caverns and the evolution process of water inrush under the multi-field coupling action of high ground stress, high ground temperature and high osmotic pressure;

[0015] (3) The model test has technical problems such as high pressure water is difficult to seal and high ground temperature is difficult to apply;

[0016] (4) Model test caverns are mostly excavated manually, and it is difficult to implement intelligent excavation and lining support for model caverns of different shapes and sizes

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