A geotechnical testing device for undisturbed samples of cryogenic frozen soil

Abstract

The invention relates to a geotechnical testing device for undisturbed samples of low-temperature frozen soil, which comprises a mercury pressure loading device, an annular cooling device is stacked on the surface of the mercury pressure loading device, and a place for placing undisturbed frozen soil samples is arranged at the center of the annular cooling device. A chamber, the opening end of the chamber is covered with an upper pressure plate, a shear wave velocity transmitter is installed on the upper pressure plate, a lower pressure plate is fixed at the bottom of the chamber, and a shear wave velocity receiver is installed in the center of the lower pressure plate , a temperature probe is fixed vertically at the center of the shear wave velocity receiver, and the temperature probe extends toward the interior of the chamber, and the shear wave velocity receiver matches the shear wave velocity transmitter; Due to the large disturbance of the sample test and the difficulty in ensuring the low temperature environment during the test, it can quickly and accurately determine the design parameters related to geotechnical engineering in permafrost regions.

Description

technical field [0001] The invention relates to a geotechnical testing device for low-temperature permafrost original samples, and belongs to the technical field of geotechnical engineering test research. Background technique [0002] With the development of economy in cold regions, large-scale water conservancy projects, industrial and civil buildings, and transportation projects have been constructed in permafrost regions. Due to the design of large-scale water conservancy projects, high-speed railways, super high-rise buildings, and other infrastructure, the requirements for the testing accuracy of rock and soil parameters are getting higher and higher. Due to the time-consuming process of geotechnical testing, the dissolution and flow of water inside the sample will destroy the structure of the sample and affect the test results. Therefore, in order to ensure the stability and safety of the buildings above the permafrost layer and improve the testing accuracy of the per...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a geotechnical testing device for undisturbed samples of low-temperature frozen soil, which solves the defects that the existing undisturbed samples of frozen soil are greatly disturbed and difficult to ensure a low-temperature environment during the test process, and can quickly and accurately determine the rock and soil in frozen soil regions. Engineering related design parameters

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