Temperature control-based dry-wet circulating unsaturated soil triaxial instrument

Abstract

The invention discloses a temperature control-based dry-wet circulating unsaturated soil triaxial instrument and belongs to the technical field of geotechnical engineering test instruments. The triaxial instrument comprises a triaxial instrument main body, a temperature regulating system, a pressure regulating system, a humidity regulating system and a data analyzing system. The temperature regulating system and the humidity regulating system control the temperature and humidity in a test environment. The pressure regulating system controls the axial pressure and the confining pressure and cooperates with a gas-supplying assembly to ensure the stability of the pressure chamber confining pressure. The triaxial instrument realizes control of the environment temperature. Through control of the environment humidity of the triaxial compression test, the triaxial instrument can realize a triaxial shearing test of unsaturated soil dry-wet circulating. The test environment temperature and humidity are controlled simultaneously and the mechanical evolution characteristics of unsaturated soil under coupling action of the temperature and humidity are researched. Through a senor and a data acquisition device, the test data can be measured and acquired and then be subjected to intelligent processing so that the automation of measurement and acquisition is realized.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering testing instruments and equipment, in particular to a temperature-controlled dry-wet cycle unsaturated soil triaxial instrument. Background technique [0002] Most of the soil above the groundwater level is in an unsaturated state, and artificial fill, expansive soil, and collapsible loess are typical unsaturated soils. In order to study the mechanical properties of unsaturated soil, it can be obtained by performing a triaxial shear test with a traditional triaxial apparatus. [0003] There are certain limitations in using a triaxial tester: first, the mechanical properties of the unsaturated soil on the surface will change with the temperature difference between day and night and four seasons; second, with the change of air humidity and the effect of rainfall, the Make the surface of unsaturated soil absorb moisture and change its mechanical properties. However, the traditional...

AI Technical Summary

Problems solved by technology

[0003] There are certain limitations in using a triaxial tester: first, the mechanical properties of the unsaturated soil on the surface will change with the temperature difference between day and night and four seasons; second, with the change of air humidity and the effect of rainfall, the Make the surface of unsaturated soil absorb moisture and change its mechanical properties

However, the traditional triaxial instrument can only carry out triaxial test under normal temperature and dry environment, because it cannot simulate the two coupling changes of temperature and humidity in the actual environment, which leads to ideal test results and does not meet the Actual situation on site

Images