Rock-soil body erosion and piping simulation test device

Abstract

The invention relates to a rock-soil body erosion and piping simulation test device, which comprises a machine frame, a water inlet pipe, a water tank, a water pump, a control unit, a water inlet pipeline, a water outlet pipeline, an erosion pipe, a soil sample chamber, a soil sample ascending and descending system and a water inlet pipe water conveying water inlet box, wherein the water inlet pipeline, the erosion pipe and the water outlet pipeline are sequentially connected; the water outlet pipeline discharge water enters the water tank; a filter screen is arranged in the water tank; water outlet pipeline discharge water is filtered through the filtering screen and then enters the water inlet pipeline through the water pump to be cyclically utilized; the soil sample chamber is positioned in the erosion pipe; the soil sample ascending and descending system conveys the soil sample into the soil sample chamber through a push rod. Data such as the flowing speed, the flow rate, the temperature and the moving water pressure of the water flow flowing out of the soil sample, the stress loss of the soil sample, and the like are determined through each sensor arranged inside the system or are obtained through calculation; through a calculation program, the erosion depth of the soil samples can be calculated; the soil sample erosion degree and the piping possibility can be evaluated; the soil body erosion characteristics are subjected to qualitative and quantitative description.

Description

Technical field [0001] The invention relates to the technical field of rock and soil erosion, in particular to a rock and soil body erosion and piping simulation test device. Background technique [0002] Soil is a kind of porous medium material, and the soil in nature is composed of soil particles, pore water and pore gas. Under the action of external factors such as pressure, pore water will flow in the pores of the soil, that is, seepage. Permeability is one of the important hydraulic characteristics of soil, and the test of soil permeability is of great significance in actual engineering layers. For sandy soil, seepage in engineering is often manifested in the form of erosion, that is, due to seepage force, particles in the soil are carried away by water. Laboratories often use constant head and variable head penetration tests to test soil permeability, and the relevant methods have been written into the national standard (GB50021). The indoor test equipment used to study ...

AI Technical Summary

Problems solved by technology

However, indoor test equipment for studying the erosion characteristics of soil is still lacking

Existing soil permeability test equipment mainly conducts soil permeability research, that is, it does not involve soil mass loss, and is not suitable for soil erosion performance research

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