Portable triaxial stress strain test device loaded by reaction force

Abstract

The invention provides a portable triaxial stress strain test device loaded by a reaction force. The portable triaxial stress strain test device comprises an experimental device, a sensor group, a power loading device and a servo motor. The servo motor provides axial pressure and confining pressure loading power for experiments, and the single power source optimization design of the experimental device is realized. A linear displacement sensor, a confining pressure sensor and a stress sensor form a data acquisition unit, and a closed loop is formed by the data acquisition unit and the servo motor, so that the automatic control of an experimental path is realized. According to the portable triaxial stress strain test device loaded by the reaction force provided by the invention, the loadingof the axial pressure and the confining pressure can be realized by means of the reaction force action of internal structures of the experimental device, such as a reaction cross beam and a reactionpiston and the like, and the automatic control can be realized through the servo motor and the sensor group. The experimental device is highly integrated, easy to operate, economical and portable, andcan effectively solve the problem of difficult triaxial stress strain experiments of field soil samples.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to an experimental device capable of performing triaxial stress-strain testing in a counter force loading manner. Background technique [0002] In the geotechnical engineering experiment, the geotechnical triaxial test instrument is a basic experimental instrument developed to study the stress-strain relationship of the soil. It simulates the three-dimensional stress state of the foundation soil to measure the strength and deformation characteristics of the soil. The basic working principle of the triaxial instrument is to pressurize the pressure chamber of the triaxial instrument with a hydraulic loading device to provide two radial orthogonal stresses of the soil sample; to the stress. During the experiment, the three orthogonal stresses, axial deformation and volume change of the soil sample were recorded. Based on these experimental data, the mechanical perfor...

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Problems solved by technology

[0006] On the basis of the traditional triaxial instrument, the present invention uses the way of counter force loading to complete the loading of axial pressure and confining pressure. question

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