Test method of permeameter contacting with structure in high stress, high hydraulic gradient, and large shear deformation

Abstract

The invention relates to a tester for seepage failure in a contact surface of soil and works at high stress, high hydraulic gradient, and large shear deformation, characterized in that: a confining pressure chamber is arranged on a pedestal; one end of an axial presser is connected with one end of an axial pressure rod, the other end of the axial pressure rod extends from the top of the confiningpressure chamber into the confining pressure chamber to contact with a sample cap, a permeable stone is arranged at the bottom of the sample cap, a sample is arranged below the permeable stone, and the sample is wrapped with a shrinkable tube closely; a confining pressure presser accesses from the bottom of the confining pressure chamber through pipes, and an osmotic pressure presser accesses from the bottom of the sample in the confining pressure chamber through pipes; one end of a first outlet pipe is connected with the sample cap, and the other end extends out of the confining pressure chamber; one end of a second outlet pipe is connected with the bottom of the sample from the bottom of the pedestal, and the other end is connected with a measuring cup below the pedestal. The tester canacquire accurate stress strain data of the sample with seepage stress coupling effect, and provides a theory basis for researching on the seepage stress coupling constitutive model of the contact surface of soil and works.

Description

technical field [0001] The present invention relates to a high stress, high hydraulic gradient, large shear deformation tester for seepage failure of the contact surface between soil and structure, especially a tester capable of studying the core wall soil or high plasticity clay of 300m above high earth-rock dams and concrete anti-corrosion A test device for the mechanism of seepage failure of the contact surface of the seepage wall. Background technique [0002] In high earth-rock dam engineering, the contact part of the anti-seepage clay or high plasticity clay of the core wall and the concrete anti-seepage wall, due to the difference in the physical and mechanical properties of the soil and the concrete anti-seepage wall, under the joint action of high stress and high hydraulic gradient Large shear deformation often occurs under the ground, and at the same time, it induces seepage damage to the soil at the contact surface, endangering the safety of the dam. Therefore, i...

AI Technical Summary

Problems solved by technology

It can be seen that the existing test devices cannot truly simulate the working conditions of high stress, high hydraulic gradient, and large shear deformation experienced by the contact surface between the soil and the concrete cut-off wall, and the research results cannot be used to guide the construction of high earth-rock dam projects. design

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