One-dimensional soil column frost heave deformation tester

Abstract

The invention discloses a one-dimensional soil column frost heave deformation tester, the one-dimensional soil column frost heave deformation tester comprises an organic glass mould for containing a one-dimensional cylindrical soil column, a circulator for soil column frost heaving through refrigeration, a test device for soil column frost heave deformation in the frost heaving process, a monitoring device for real-time monitoring of internal temperature change of a soil sample along the soil column height change in the refrigeration process, a water replenishing device for simulation of replenishing groundwater into the soil column from bottom to up, a drainage device, a testing device for testing the pore water pressure of the soil column in the process of frost heaving, and a data acquisition system; the one-dimensional soil column is a cylindrical soil sample, the mould for containing the one-dimensional cylindrical soil column is vertically-arranged cylindrical double-layer transparent organic glass, and the water replenishing device is connected with the bottom of the one-dimensional cylindrical soil column by a water replenishing pipe. The one-dimensional soil column frost heave deformation tester has the advantages of simple structure, reasonable design, practical operation and good practical effect, can simulate the indoor soil frost heave deformation process, and can effectively test soil body internal temperature, pore water pressure, vertical frost-heave capacity, vertical volume deformation and frost heaving force.

Description

technical field [0001] The invention specifically relates to a one-dimensional soil column frost heaving deformation measuring instrument, which belongs to the technical field of geotechnical testing instruments. Background technique [0002] In recent years, with the construction of a large number of projects in cold regions (projects built in permafrost regions or seasonally frozen regions, including roads, oil and gas pipelines, etc.), frost heaving has become the most important engineering disaster faced by engineering construction in cold regions in my country. . The area of ​​permafrost in my country is widely distributed, among which permafrost accounts for about 22.3% of the country's land area, and the area of ​​high-altitude permafrost is the largest in the world, while seasonally frozen soil is more widely distributed. When onshore oil and gas pipelines pass through geologically complex areas such as the permafrost regions mentioned above, the high-temperature and...

AI Technical Summary

Problems solved by technology

The freezing instrument is a kind of frozen soil performance test equipment that has been used in recent years. The Chinese invention patent application number: 201510313671 discloses a continuously variable temperature multi-level gradient freezing instrument. The instrument can only study the performance of the freezing process of frozen soil. Cannot get more test data at the same time

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