Triaxial test equipment for measuring eroded soil particles under action of seepage force

Abstract

The invention discloses triaxial test equipment for measuring eroded soil particles under the action of seepage force. The equipment comprises a constant-flow seepage system, a soil particle migration grading measurement system, a large-range volume pressure control vacuum system and a data processing analysis system; the constant-flow seepage system is connected with the soil particle migration grading measurement system and the large-range volume pressure control vacuum system through pipelines; and the data processing analysis system comprises a data acquisition device and a computer; the constant-flow seepage system, the soil particle migration grading measurement system and the large-range volume pressure control vacuum system are connected to the data acquisition device through lines; and the computer is connected with the data acquisition device through a line. Simulation and dynamic observation of the erosion phenomenon of a soil sample under the action of specific seepage force are achieved, and an accurate and effective basic test data is provided for research on the disaster-causing mechanism of geological disasters corresponding to the erosion phenomenon.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a triaxial test device for measuring eroded soil particles under the action of seepage force. Background technique [0002] Soil seepage deformation can be divided into flow soil, piping (also known as internal erosion), contact erosion and contact loss. Flowing soil refers to the phenomenon that under the action of seepage force, when the effective stress between particles is zero, the particle group suspends and moves, which is called flowing soil or quicksand phenomenon. In sand and silt, its occurrence is generally sudden, which is more harmful to the project. Flowing soil is the movement of soil particles regardless of particle size, and it is not the loss of fine soil particles through the pores of coarse soil particles; piping refers to Under the action of seepage, fine particles are washed away or carried out from the pores of coarse particles. [0003]...

AI Technical Summary

Problems solved by technology

This penetration-erosion test method has many deficiencies: 1. The sample is placed under the water head provided by the suspended water tank for the penetration-erosion test. The range of the water head provided is limited, and the head cycle change and complex stress cycle change cannot be achieved. Simulated erosion under coupling conditions; 2. The lost particles after soil erosion cannot be collected in different grades; 3. The soil sample can only be submerged in water for rough saturation, and the soil cannot reach the saturation level of the saturated soil sample in the unit test. High saturation requirements, so the influence of saturation on the mechanical properties of the sample cannot be avoided

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