Experimental method based on karst collapse experimental device with dominant channel in upper covering layer

Abstract

The invention relates to the technical research field of karst collapse, in particular to an experimental method based on a karst collapse experimental device with an upper covering layer containing a dominant channel. The karst collapse experimental device comprises a model box, a rainfall device located above the model box, a water supply box located below the model box, a first variable head box and a second variable head box, wherein the first variable head box and the second variable head box are located on the two sides of the model box and are adjustable in height. A partition plate is horizontally arranged in the middle of the model box to divide the model box into an upper cover layer model box and a lower karst cave model box; clay blocks are uniformly paved in the cover layer model box; the first water outlet pipe is communicated with a first variable head box, the second water outlet pipe is communicated with a second variable head box, and the third water outlet pipe is communicated with a rainfall device; therefore, on one hand, a brand new technical means can be provided for researching seepage deformation generated by a soil layer in the rainfall process and karst collapse caused by dominant flow, the cause mechanism of the karst collapse process is reproduced and revealed, and a certain reference value is provided for prevention and prediction work of karst collapse.

Description

technical field [0001] The invention relates to the field of karst collapse technology research, in particular to an experimental method based on a karst collapse experimental device with dominant channels in an upper covering layer. Background technique [0002] In nature, the soil often produces holes due to the interpenetration of plant roots, and the movement of tiny animals forms channels and burrows. In some areas, dense drying shrinkage joints are produced due to low soil moisture content, and soil finger-shaped infiltration channels are formed due to unstable wetting fronts, etc. , the channels present in the soil are called dominant channels. [0003] The process of water and solute passing through the porous medium through the dominant channel is called the dominant flow. As the movement of water in a certain part of the soil, the dominant flow is faster than the reflection of other parts of the phenomenon, which makes the soil profile appear irregular wetness. Th...

AI Technical Summary

Problems solved by technology

[0007] The current karst collapse simulator cannot effectively study the types of karst collapse with dominant channels in the overburden

Images