Model Test Study on Natural Thawing Temperature Field of Artificial Ground Frozen Wall

In order to visualize the evolution and distribution law of the ground temperature field during artificial freezing construction, an indoor model test study was carried out based on the independently constructed hygrothermal coupling artificial ground freezing test platform. The test results show th...

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Bibliographic Details
Published in:Sustainability 2023-02, Vol.15 (4), p.3186
Main Authors: Cai, Haibing, Yang, Longfei, Pang, Changqiang, Li, Mengkai, Lu, Chanrui, Hong, Rongbao
Format: Article
Language:English
Subjects:
Construction
Design
Distribution functions
Earth temperature
Environmental aspects
Freezing
Ground freezing
Heat conductivity
Mechanical properties
Model testing
Pipes
Soil freezing tests
Soil temperature
Steel pipes
Sustainability
Temperature distribution
Thawing
Wall temperature
Walls
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Summary:In order to visualize the evolution and distribution law of the ground temperature field during artificial freezing construction, an indoor model test study was carried out based on the independently constructed hygrothermal coupling artificial ground freezing test platform. The test results show that the soil temperature in the freezing process went through the three stages of a steep drop, a slow drop, and stabilization, the earliest closure position of the frozen wall was the intermediate point between two freezing pipes, and the thickness of the frozen wall on different sections showed Section 1 > Section 2 > Section 3 after 61 min of positive freezing. The soil temperature in the natural thawing process went through the four stages of a rapid rise, short hysteresis, a second rapid rise, and a linear slow rise. By fitting the test data, the distribution function of the pipe wall temperature along the pipe length under natural thawing conditions was obtained. The research results can provide a valid basis for the numerical calculation model of a three-dimensional non-uniform natural thawing temperature field and can also provide a reference for the design of settlement grouting under natural thawing conditions.
ISSN:2071-1050
2071-1050
DOI:10.3390/su15043186