Device capable of applying compressive stress for permeability test and using method thereof

Abstract

The invention discloses a device capable of applying a compressive stress for a permeability test and a using method thereof. The device comprises a water inlet, an upstream buffer zone, a soil sample chamber, a downstream buffer zone and a water outlet which are sequentially communicated from the left side to the right side, wherein a soil sample placing platform is fixed to the lower part of the soil sample chamber; a pressure loading platform capable of moving up and down along the inner wall of the soil sample chamber is arranged on the upper part of the soil sample chamber; the upstream buffer zone and the soil sample chamber are separated by the upstream water-permeable separating net; the soil sample chamber and the downstream buffer zone are separated by the downstream water-permeable separating net; the upstream buffer zone and the downstream buffer zone are filled with aggregate; the mesh apertures of the upstream water-permeable separating net and the downstream water-permeable separating net are smaller than the grain size of the aggregate. The device solves the problem that in the prior art, no relatively-pertinent test equipment for testing permeability deterioration of a porous medium in the presence of the compressive stress exists; the device can relatively really represent the permeability deterioration of the porous medium in the presence of the compressive stress, and can improve the test efficiency, reduce the test cost and enhance the test controllability.

Description

technical field [0001] The invention belongs to the fields of soil and water conservation and soil mechanics, and in particular relates to a device capable of applying compressive stress for a penetration test and an application method thereof. Background technique [0002] Under the erosion of running water or other fluids, the permeability and microstructure of soil or other porous media will change, which will affect the overall engineering characteristics and safety. The phenomenon of seepage under compressive stress is more common in actual engineering. [0003] At present, the tests on seepage degradation, destruction and shape change of soil or other porous media under compressive stress conditions are not mature, there are no more targeted test methods and test equipment, and the existing tests are less controllable. Difference. [0004] Therefore, it is necessary to design a test device that can more realistically reflect the evolution of the stability of the porou...

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of device that can apply compressive stress and using method thereof for permeation test, solve the problem that there is no relatively targeted test equipment in the prior art to porous medium under the condition of compressive stress Penetration Deterioration, Destruction, and Morphological Change Testing Issues

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