Hydraulic-induced covered karst collapse simulation testing device and using method

Abstract

The invention relates to a testing device for researches on a covered karst collapse process mechanism under influence of a hydraulic condition. The device comprises a water level control unit, an artificial rainfall simulation unit, a testing unit and an intelligent monitoring unit, wherein the water level control unit is used for controlling a pressure water head and a phreatic water level of the testing unit in a testing process; the artificial rainfall simulation unit is used for simulating rainfall by virtue of a peristaltic pump; the testing unit is used for covered karst collapse testing; the intelligent monitoring unit is used for monitoring the water pressure, soil pressure, displacement and surface deformation of a soil body of a cover layer in the testing unit and particle sizes and concentration of particles in case of damage to the soil layer. The testing device is applied to tests in researches on a covered karst collapse formation processing mechanism under a complex groundwater boundary condition, and is higher in stability, and meanwhile, testing equipment is simplified, and testing cost is reduced. By the device, the whole covered karst collapse process can be visually observed to fulfill the aim of deeply exploring the covered karst collapse mechanism.

Description

Technical field [0001] The invention belongs to the field of geological disasters, and particularly relates to a hydraulically induced overburden karst collapse simulation test system, which is suitable for indoor experiments of the overburden karst collapse induced by complex hydraulic conditions. Background technique [0002] With the economic growth, the impact of human activities on the overburden karst area is increasing, and the problem of overburden karst collapse is becoming more frequent and serious. The collapse process is very sudden and rapid. It will not only cause casualties, but also damage road traffic engineering, water conservancy and hydropower engineering, and geotechnical engineering, and cause soil erosion in karst areas, affect the environment, and have a serious impact on social stability. Therefore, it is of great significance to carry out experimental research on the formation mechanism of overburden karst collapse. The exploration of the mechanism of o...

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Problems solved by technology

For the exploration of the mechanism of covered karst collapse, it is necessary to frequently change the experimental conditions and conduct repeated experiments. Once the existing indoor experimental environment is established, it is difficult to change the conditions, the cycle is long, and the cost is high, which cannot fully meet the needs of production and scientific research. The supporting technology of the experi

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