Shake table test real-time loading device for simulating different burial depths of rock tunnel

Abstract

The invention relates to a shake table test real-time loading device for simulating different burial depths of a rock tunnel. The shake table test real-time loading device comprises a model case, a real-time loading device body and a data acquisition system. The model case is used for containing test model materials and providing counter force for the real-time loading device body. The loading device body comprises a loading system and a sliding loading plate and used for achieving real-time loading of the test model materials in the ground shake application process. The acquisition system is used for monitoring real-time soil pressure of the test model materials in the real-time loading process. The device is used for solving the simulation problem of surrounding rock stress fields under the different burial depths in the shake table test process and can conduct loading when a test model shears and deforms in the vibration process, true real-time loading is achieved, the loading situation is monitored, and convenience is brought to research on power reaction of the tunnel under different burial depths. An air bag loading mode is adopted, shake table test loading can be conducted and meanwhile the mass of the model case can be reduced to the maximum degree.

Description

technical field [0001] The invention belongs to the technical field of underground engineering test instruments, and relates to a real-time loading device for a shaking table test used for simulating different buried depths of rock tunnels. Background technique [0002] During the Wenchuan Earthquake, many tunnels were severely damaged, with cracks in the lining, heaving of the floor, exposed steel bars, and water seepage in the tunnels. With the large-scale construction of highway tunnels, researches on the seismic resistance and damping of underground structures are gradually gaining people's attention. Shaking table test is one of the effective means to research the seismic performance of tunnels. Because highway and railway tunnels are often buried deep, when an earthquake occurs, the tunnel structure will move together with the surrounding rock under high ground stress. However, due to the limitations of the current shaking table conditions, it is still impossible to si...

AI Technical Summary

Problems solved by technology

It overcomes the obvious distortion of the similarity ratio of gravity acceleration and the inability to balance the weight, which leads to the serious distortion of the test, solves the simulation problem of the stress field of the surrounding rock under different buried depths, and can analyze the test model during the vibration process. Loading under deformed conditions, truly real-time loading, and monitoring of loading conditions

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