Soil engineering triaxial shear test equipment based on MTS electro-hydraulic servo tester

Abstract

The invention discloses soil engineering triaxial shear test equipment based on an MTS electro-hydraulic servo tester. The soil engineering triaxial shear test equipment comprises the MTS electro-hydraulic servo tester, wherein a soil engineering triaxial shear testing device is mounted on an MTS electro-hydraulic servo tester upper chuck and an MTS electro-hydraulic servo tester lower chuck of the MTS electro-hydraulic servo tester. The soil engineering triaxial shear test equipment has the following technical effects as follows: an accurate and stable force source is provided through sufficient utilization of the MTS electro-hydraulic servo tester, perpendicular pressurization on a sample is realized through an upper fixing rod and an axial drive rod, increasing and stabilizing of the confining pressure and the back pressure of the sample are realized through matching of a fed liquid of a liquid feeding port and a pressure volume controller, finally, back pressure saturation, isotropy and anisotropy of consolidation loading and unloading circulation, K0 solidification, creep solidification and dynamic and static triaxial shear test of the sample can be performed on the sample through close matching of components, the test process is controlled through software, the operation is simple and convenient, the automation degree is high, and the soil engineering triaxial shear test equipment is suitable for research, popularization and application; the equipment is simple and compact in structure, convenient to assemble, low in cost, high in measurement accuracy and good in stability and occupies small space.

Description

technical field [0001] The invention relates to the field of geotechnical engineering research, in particular to a geotechnical triaxial testing device based on an MTS electro-hydraulic servo testing machine. Background technique [0002] In recent years, with the rapid development of my country's engineering construction, especially in the field of geotechnical engineering, the research on the support of super high slopes, the excavation of deep foundation pits, the study of geological hazards and other complex engineering geological conditions has become more and more in-depth. The requirements for indoor geotechnical testing are getting higher and higher. Soil is a very complex natural material and is mostly in a three-dimensional stress state. In many cases, experiments under simple stress states cannot fully reflect the stress state of soil in engineering practice. The geotechnical triaxial test system is a new type of experimental equipment that conforms to the field o...

AI Technical Summary

Problems solved by technology

[0005] Defect: The axial loading device of the domestic geotechnical triaxial instrument is generally a stepping motor

[0008] Defect: MTS electro-hydraulic servo testing machine is currently only used for physical and mechanical uniaxial performance tests of metallic materials and some non-metallic solid materials, while granular materials such as rock soil and asphalt concrete have significant pressure sensitivity, which often needs to be considered Triaxial compressive stress-strain properties

Therefore, the MTS electro-hydraulic servo testing machine will not be able to directly carry out triaxial compression experiments, which undoubtedly greatly reduces the scalability of the MTS electro-hydraulic servo testing machine

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