An indoor simulation method of soil freezing and thawing process

Abstract

The invention relates to an indoor simulation method for soil freeze-thaw process comprising: S1, forming saturated soil in a soil bin; S2, cooling the soil bin (1) to freeze the saturated soil; S3, disposing a bottom side heat-insulation layer (2) on an experiment table; disposing a bottom side cooling layer (3) on the bottom side heat-insulation layer (2), disposing the cooled and frozen soil bin (1) on the bottom side cooling layer (3), wrapping a peripheral heat-insulation layer (4) around the soil bin (1), wrapping a peripheral cooling layer (5) around the peripheral heat-insulation layer (4), wherein the bottom side cooling layer (3) and the peripheral cooling layer (5) provides a cooling environment for the soil bin (1); S4, maintaining the arrangement of the bottom side heat-insulation layer (2), the bottom side cooling layer (3), the peripheral heat-insulation layer (4), the peripheral cooling layer (5) and the soil bin (1) in the step S3 until the saturated soil in the soil bin (1) thaws gradually. The indoor simulation method for soil freeze-thaw process can basically unfreeze the saturated soil one-dimensionally from top down.

Description

technical field [0001] The invention relates to the field of indoor simulation experiments of soil freeze-thaw erosion, in particular to an indoor simulation method of the soil freeze-thaw process. Background technique [0002] Freeze-thaw soil erosion caused by melting water in high-altitude cold regions is serious, which has a serious impact on ecology, production, living and engineering facilities. Research on methods and facilities for simulating soil freeze-thaw process is of great significance to the study of freeze-thaw soil erosion process and its mechanism. [0003] The conditions of meltwater erosion make the slopes in the high-altitude and cold regions scoured, and rill erosion occurs, and the intuitive result of rill runoff erosion is the increase of slope sediment load. Only through the analysis and research of the external phenomena shown by the erosion development can it be possible to understand the inner essence of the erosion process. Therefore, in order ...

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Problems solved by technology

[0004] At present, there are relatively few researches on soil erosion tests of alternating freeze-thaw at home and abroad, lack of perfect test methods, and can not systematically study the effect of alternate freeze-thaw on soil erosion process

The indoor test facilities are simple and cannot simulate the alternate freezing and thawing environment well. These laboratory studies are quite different from the real situation.

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