Low-confining-pressure static and dynamic triaxial testing system based on MTS power source

Abstract

The invention provides a low-confining-pressure static and dynamic triaxial testing system based on a MTS power source, and belongs to the study field of geotechnical engineering. The low-confining-pressure static and dynamic triaxial testing system comprises a MTS tester and a triaxial testing device; the triaxial testing device comprises a pressure chamber, a measuring system and a confining pressure control system; the pressure chamber comprises a base, a side wall and a top plate; the measuring system comprises an electronic displacement meter, a radial deformation sensor and a force sensor; the side wall is in sealing connection with the base and the top plate; the force sensor is installed on the base, and a test sample is placed on the force sensor; the radial deformation sensor is plugged in the test sample; a test sample cap is arranged on the test sample, and the test sample cap is connected with a dowel steel; the dowel steel is connected with an actuator of the MTS tester by crossing through the top plate of the pressure chamber; the electronic displacement meter is installed on the dowel steel; the pressure chamber is connected with a confining pressure control system; confining pressure control system is used for providing stable confining pressure; the confining pressure medium is compression gas. The low-confining-pressure static and dynamic triaxial testing system solves the technical problem of unstable low confining pressure environment, big confining pressure difference and big measurement bias of the acting force at present.

Description

technical field [0001] The invention relates to the field of geotechnical engineering research, in particular to a low confining pressure static and dynamic triaxial test system based on an MTS power source. Background technique [0002] The triaxial test can effectively simulate the natural stress state of the soil, and is an important test method for studying the mechanical properties of the soil. The static triaxial test can be used to determine the strength parameters c and In addition, it is also used for soil pore pressure dissipation test, penetration test and static lateral pressure coefficient test, etc.; dynamic triaxial test can be used to study the dynamic strength, dynamic deformation and dynamic pore pressure characteristics of soil under cyclic loading. Based on the results of static and dynamic triaxial tests of soil, it is the premise and basis for carrying out theoretical research on soil constitutive models, performing numerical calculations, and solving...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a low confining pressure static and dynamic triaxial test system based on MTS power source to solve the current technical problems of unstable low confining pressure environment, large confining pressure difference, and large force measurement error

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