Experiment simulation device and method for quantitatively researching karst collapse

Abstract

The invention provides an experiment simulation device and method for quantitatively researching karst collapse. The device comprises a model main body, a water supply unit, a constant-pressure sand-soil collecting unit, a seepage field monitoring unit and a ground deformation monitoring unit, wherein the model main body is karst covering layer and karst bed rock simulation equipment and comprises a covering layer cavity and a karst ground layer cavity, wherein the karst ground layer cavity is located at the lower part of the covering layer cavity and is communicated to the covering layer cavity; the power supply unit comprises a covering layer water supply unit communicated with the covering layer cavity and a karst ground layer water supply unit communicated with the karst ground layer cavity; and the constant-pressure sand-soil collecting unit is used for collecting karst collapse sand-soil quantity in different moments when a karst water level is constant in the whole karst collapse process and quantitatively evaluating a collapse evolution process. According to the experiment simulation device, the karst collapse process is quantitatively researched by monitoring the dynamic change of the seepage field of the covering layer and the leakage quantity of collapse sand of the covering layer.

Description

technical field [0001] The invention relates to the technical field of engineering geological disaster simulation, in particular to a test simulation device and method for quantitatively studying karst collapse. Background technique [0002] Karst subsidence is one of the six major geological disasters in my country, which has caused great losses to the lives and properties of our people. Karst collapse refers to the natural phenomenon that there are karst cavities in the soluble rock hidden under the overburden layer. Under the action of natural or human factors, the material in the overburden layer enters the karst cavity along the karst channel, causing the leakage of the covering soil and causing the ground to collapse. At present, the research on karst collapse is almost all carried out with the final form of karst collapse as the research object. It is mainly qualitative research, and it is difficult to understand the process of karst collapse. This has led to an incom...

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Problems solved by technology

At present, the research on karst collapse is almost all carried out with the final form of karst collapse as the research object. It is mainly qualitative research, and it is difficult to understand the process of karst collapse. This has led to an incomplete and in-depth understanding of the formation mechanism of karst collapse, and no unified understanding has been formed.

[0003] Using karst physical model tests can reproduce the process of karst collapse and improve the understanding of the evolution nature of karst collapse. The collapse process mainly considers the influence of karst openings and groundwater dynamic conditions on the collapse development process. It is impossible to conduct regular collection of sand and soil leakage in karst collapse under the condition of keeping the unit pressure of karst pipelines stable. There is a lack of methods and technologies for quantitative research on the process of karst collapse , especially how to obtain the degree of collapse of the karst overburden during the collapse process

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