Device and method for manufacturing frozen soil sample with layered cryogenic structure

Abstract

The invention relates to a device and a method for manufacturing a frozen soil sample with a layered cryogenic structure. The device consists of a heat preservation box main body, a heat preservationbox upper cover, a sample cylinder, a sample cylinder upper cover, temperature control tubes, vacuum tubes, refrigeration tubes, a base seat, a temperature sensor, a moisture sensor and temperature control systems, wherein, the temperature control tubes, the vacuum tubes and the refrigeration tubes are all annular and form a closed loop with the temperature control systems and are arranged on thesurface of the outer wall of the sample cylinder; the temperature control tubes, the vacuum tubes and the refrigeration tubes are all connected with respective temperature control systems; and the temperature control systems can control the temperature of a circulating liquid in the temperature control tubes, the vacuum tubes and the refrigeration tubes; and pipe holes are formed in the heat preservation box main body and are used for the temperature control tubes, the vacuum tubes and the refrigeration tubes to pass through and fix positions of the tubes. The heat preservation box has the characteristics of simple structure, convenient operation and the like.

Description

technical field [0001] The patent of the present invention relates to a device and method for making a layered cryogenic structure frozen soil sample. Background technique [0002] Frozen soil is a multiphase complex composed of soil particles, liquid water, ice and gas. Usually, the soil with a temperature of 0 °C or below and containing ice is called frozen soil. In nature, frozen soil can be seen everywhere. During the freezing process of the soil, the ice-forming effect of the water in the soil depends on the strength and speed of the joint action of internal stress and external stress, and the difference in strength and speed During the process of freezing the water in the soil into ice, the spatial arrangement and combination of ice crystals or ice layers and mineral particles are very different, which will lead to differences in the cryogenic structure of frozen soil. According to the division of frozen soil cold structure in "Frozen Soil Mechanics" (written by Ma We...

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Problems solved by technology

[0009] (1) The frozen soil samples produced are mainly aimed at frozen soils with high water (ice) content, and cannot be applied to frozen soils lower than saturated water (ice) content;

[0010] (2) The purpose of controlling the position of the ice layer cannot be achieved;

[0011] (3) The operation is complicated, and the freezing temperature, freezing time, and the height of the uniform mixture of soil and water are not easy to control

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