Model test system for materials of surrounding rock and lining structures of high-ground-temperature diversion tunnel

Abstract

The invention provides a model test system for materials of surrounding rock and lining structures of a high-ground-temperature diversion tunnel. The model test system can simulate tests of influence of high ground temperature on surrounding rock-lining temperature field and stress field change rules under the action of abrupt temperature drop. The model test system comprises a high-ground-temperature diversion tunnel similar material model system, a data collection system, a constant-temperature circular heat supply device, a confining pressure simulation device and a thermal insulation device, wherein the high-ground-temperature diversion tunnel similar material model system comprises a primary rock and a lining model located in the primary rock; the data collection system comprises a computer, a static strain test system connected with the computer, a temperature recorder connected with the static strain test system, a temperature sensor located in the primary rock and a prearranged strain gauge carrier located in the lining model; the temperature sensor is connected with the temperature recorder, and the prearranged strain gauge carrier is connected with the static strain test system; the constant-temperature circular heat supply device comprises intelligent temperature control circulating water heaters located on the periphery of the primary rock; the confining pressure simulation device comprises surrounding rock pressure plates located on the periphery of the primary rock and jacks contacted with the outer surfaces of the surrounding rock pressure plates, and the jacks can push the surrounding rock pressure plates to apply pressure to the primary rock.

Description

technical field [0001] The invention relates to a model test device for a water diversion tunnel, in particular to a model test system for materials such as surrounding rock and lining structures of a water diversion tunnel with high ground temperature. Background technique [0002] At present, water diversion tunnels with high ground temperature in my country are mainly concentrated in the west, especially in Xinjiang and Tibet. The main source of the river water is melted water from snow mountains, and the water temperature is very low. A large temperature difference is formed, resulting in tension cracks inside the structure, which will cause great harm to the water diversion tunnel. For water diversion tunnels with high ground temperature, due to the different temperature drop rates, especially the surrounding rock failure mechanism test under the condition of sudden temperature drop caused by cold water has not been paid much attention. Therefore, indoor model tests can...

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Problems solved by technology

[0002] At present, water diversion tunnels with high ground temperature in my country are mainly concentrated in the west, especially in Xinjiang and Tibet. The main source of river water is melted water from snow mountains, and the water temperature is very low. A large temperature difference is formed, resulting in tension cracks inside the structure, which will cause great harm to the water diversion tunnel

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