Device for tracking moisture migration process in frozen soil and experiment method thereof

A technology for tracking devices and migration processes, applied in measurement devices, analytical materials, material excitation analysis, etc., can solve the problems of lack of visibility, inability to analyze the water migration process, etc., to achieve strong operability, reduce human interference, use good effect

Active Publication Date: 2015-11-25
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lack of experimental equipment, experimental techniques, and methods has always been the bottleneck for the in-depth research on the law of water migration in frozen soils; The dry method is a method of testing the water content of soil at different heights before and after freezing. This method can only obtain the distribution of water content before and after freezing of the soil, and cannot analyze the process of water migration; the second is to use a moisture sensor to test the soil moisture during freezing. Changes in water content. Although this method can monitor the water migration process, it lacks visibility. At the same time, the test of water content is mostly volumetric water content.

Method used

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  • Device for tracking moisture migration process in frozen soil and experiment method thereof
  • Device for tracking moisture migration process in frozen soil and experiment method thereof
  • Device for tracking moisture migration process in frozen soil and experiment method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The implementation process of tracking the water migration process in frozen soil under the condition of sealing and no water replenishment is as follows:

[0039] According to the water content and dry soil quality, the water content in the soil was obtained, and the fluorescent agent was mixed into the soil according to the ratio of 5g per liter of water, and sealed and maintained for a whole day and night. Fill the well-cured mixture into the soil sample tank, insert the temperature sensor after filling to the set position, then place the soil sample tank in the lower cooling bath tank 6, place the upper cooling bath plate 5 on the top of the soil, and place the lower cooling bath plate 5 on the top of the soil. The refrigerated liquid inlet 6-3 and refrigerated liquid outlet 6-4 on the bath 6 and the refrigerated liquid inlet 5-2 and refrigerated liquid outlet 5-3 on the upper cold bath plate 5 are respectively connected to an external cooling device. Close the wate...

Embodiment 2

[0041] The implementation process of tracking the water migration process in frozen soil under the condition of open water replenishment is as follows:

[0042] Soil samples were prepared according to water content and dry soil quality, and sealed and maintained for a whole day and night. Fill the well-cured mixture into the soil sample tank, insert the temperature sensor after filling to the set position, then place the soil sample tank in the lower cooling bath tank 6, place the upper cooling bath plate 5 on the top of the soil, and place the lower cooling bath plate 5 on the top of the soil. The refrigerated liquid inlet 6-3 and refrigerated liquid outlet 6-4 on the bath 6 and the refrigerated liquid inlet 5-2 and refrigerated liquid outlet 5-3 on the upper cold bath plate 5 are respectively connected to an external cooling device. Connect the water replenishment port of the lower cold bath plate 3 to the external Martens water replenishment bottle, open the water replenish...

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Abstract

The invention discloses a device for tracking a moisture migration process in frozen soil and an experiment method thereof. The device includes a soil sample tank, an upper cold bath board and a lower cold bath tank; the soil sample tank is composed of an organic glass wide board, an organic glass narrow board and a lower cold bath board; the lower cold bath board can be connected with an externally-arranged Markov water filling bottle to simulate supply of groundwater, the upper cold bath board is provided with an inlet and an outlet of a freezing fluid, and the lower cold bath tank is composed of an organic glass board tank and a snakelike copper tube. The method comprises the steps: firstly, the soil sample tank is filled with a mixture of a fluorescent agent, water and soil, then the soil sample tank is placed in the lower cold bath tank, the upper cold bath board is placed on the top of a soil body, the lower cold bath board is connected with the Markov water filling bottle, the upper cold bath board and the lower cold bath tank which are connected with an external cooling device are adopted for one-way cooling for the soil body, a purple light lamp and a digital camera are started in the testing process, and the moisture migration process in the soil body freezing process is tracked. The device is simple in structure and convenient to operate, and can intuitively observe the moisture migration process in the frozen soil.

Description

technical field [0001] The invention relates to a moisture migration process tracking device in frozen soil and an experimental method thereof, belonging to the technical field of indoor geotechnical low temperature tests. Background technique [0002] Frozen soil, as a special soil quality in engineering, is widely distributed in Northeast, North and Northwest China. With the rapid development of my country's economy, the construction of railways, roads, water conservancy, pipelines and other projects in permafrost areas is vigorously advancing, while the soil in permafrost areas crystallizes into ice during the freezing process, causing frost heave due to the displacement of soil particles, and Derived from these diseases, such as thawing, mud turning, and freezing and pulling, have always been difficult problems in the construction of railways and roads in permafrost areas, and are also the focus of research by permafrost scholars at home and abroad. [0003] Domestic and...

Claims

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Application Information

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IPC IPC(8): G01N21/84G01N21/64
Inventor王天亮岳祖润孙铁成
OwnerSHIJIAZHUANG TIEDAO UNIV