A simulation device for soil surface loss and underground loss in surface karst fracture zone

Abstract

The invention relates to a soil surface loss and underground leakage simulation device in a surface karst fissure zone, comprising a rainfall simulation platform, a karst slope and fissure simulation device, and an experimental data acquisition system; the rainfall simulation platform includes sequentially connected water inlet devices, rainwater fluidization device and water outlet device, the water outlet device is set above the karst slope and fissure simulation device; the karst slope and fissure simulation device includes a model box and a karst slope and fissure model set on the model box, the bottom of the model box is hollowed out, and the surface is installed on the side The loss collection funnel, karst slope and fissure model include the karst slope and the vertical karst channels set in the karst slope; the experimental data collection system includes the underground loss soil and water collection box and the surface loss soil and water loss collection box. Compared with the prior art, the present invention can obtain simulated data of soil surface loss and underground loss in the surface karst fissure zone in a short period of time under different karst slope conditions and different rainfall conditions.

Description

technical field [0001] The invention relates to the technical fields of hydrogeology and karst ecological environment protection, in particular to a device for simulating soil surface loss and underground loss in a surface karst fissure zone. Background technique [0002] The phenomenon of rocky desertification in the karst area of ​​southwest my country has seriously affected the life of local people and the development of economy, and has become an ecological and environmental problem that needs to be solved urgently. The phenomenon of rocky desertification is mainly due to the long-term soil erosion in the fragile karst ecology, and because of the complexity and duality of the geological structure in the karst area, the soil will also experience underground leakage in addition to surface erosion, among which rainfall is the main cause of soil erosion. External forces, karst fissures and pipes are important causes of underground leakage in soil. However, under natural con...

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Problems solved by technology

The invention is driven by hydrostatic pressure applied to the soil to make it migrate, rather than rainfall under natural conditions. Changes in rainfall conditions have differences in the distribution of water flow on the soil surface and the seepage process inside the soil. Therefore, soil There are differences in the surface flow and internal migration of particles; secondly, the invention does not consider the surface loss of soil, it is only used to simulate the process of soil underground loss, and the underground cracks of the invention are controlled by transparent hoses, which are similar to the real The soil-rock interface is quite different, and the friction coefficient of the soil-rock interface is also different

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