Cold region stratum multi-physical process variable force test device and method

Abstract

The invention discloses a cold region stratum multi-physical process variable force testing device and method. The testing device comprises a variable force mechanism, a bearing mechanism for containing a soil sample, a freezing and thawing circulation mechanism and a data monitoring mechanism. The bearing mechanism is connected with the variable body force mechanism, and the variable body force mechanism is used for driving the bearing mechanism to rotate, so that the soil sample on the bearing mechanism obtains acceleration. The freezing and thawing circulating mechanism comprises a cold bath module and a water supplementing module, the cold bath module and the water supplementing module are both connected with the bearing mechanism, and the cold bath module is used for performing heat exchange with the soil sample to adjust the temperature of the soil sample, so that a freezing and thawing environment can be simulated; the water supplementing module is used for adjusting the water content of the soil sample. The data monitoring mechanism is used for monitoring the temperature, water content and deformation of the soil sample. According to the test device provided by the embodiment of the invention, the accuracy of a test result is improved by accurately simulating a temperature field, a moisture field and a stress field of a cold region stratum.

Description

technical field [0001] The invention relates to the technical field of small-scale model freeze-thaw cycle tests, in particular to a device and method for multi-physics process variation physical force test of strata in cold regions. Background technique [0002] In the middle, high latitude and low latitude high altitude areas of the northern and southern hemispheres, the surface layer of the lithosphere is in a state of negative temperature for a long time, and the liquid water in the soil pores and rock fissures is frozen and transformed into solid ice, and the loose soil is cemented. Granules and rocks, therefore, soils or rocks at or below 0°C and cemented by ice are called permafrost or frozen rocks. Generally, according to the duration of soil being frozen, it is divided into short-term frozen soil, seasonal frozen soil and permafrost. In cold regions, along with the freezing and melting of water in the formation, a series of strange and unique permafrost phenomena o...

AI Technical Summary

Problems solved by technology

[0004] High cost; poor accuracy of test results

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