Numerical Analysis of the Effect of Groundwater Seepage on the Active Freezing and Forced Thawing Temperature Fields of a New Tube–Screen Freezing Method
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Published:2023-06-09
Issue:12
Volume:15
Page:9367
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ISSN:2071-1050
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Container-title:Sustainability
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language:en
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Short-container-title:Sustainability
Author:
Ren Jixun12,
Wang Yongwei1,
Wang Tao2,
Hu Jun12ORCID,
Wei Kai3,
Guo Yanshao3
Affiliation:
1. School of Civil Engineering and Architecture, Hainan University, Haikou 570228, China
2. State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
3. China Railway 20 Bureau Group Corporation Limited First Engineering Co., Ltd., Xi’an 710016, China
Abstract
To more comprehensively explore the mechanism of the active freezing and thawing process of a new tube–curtain freezing method in construction, the temperature field of the new tube–curtain freezing process is analyzed using finite element software to establish a numerical model. Six paths were set up upstream and downstream of the model and around the top steel tube to analyze the development of frozen soil curtains during active freezing and forced thawing. The results show that, due to the effect of seepage, the cold energy generated by the upstream frozen pipe will be carried to downstream by water, which leads to the asymmetry of the frozen soil curtain. A greater seepage rate leads to a more pronounced the influence on the development of the temperature field. During the process of forced thawing, the first 15 days of the frozen soil curtain heating rate are fastest; thus, it is necessary to monitor the thawing settlement intensively during this period. By comparing different heads of water and different forced thawing temperatures, it was found that a bigger head of water results in a longer thawing time. At a constant head of water, a higher thawing temperature results in a shorter thawing time, with the thawing time at 50 °C being about 0.5 times that at 5 °C. Low-temperature thawing can be chosen to control the cost; however, when the head of water is large, high-temperature thawing can significantly shorten the thawing time. In addition, the new tube–curtain freezing method has little influence on the surrounding environment, along with a short construction period and low construction cost, in accordance with the concept of sustainable development.
Funder
State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology
the Hainan Provincial Natural Science Foundation of China
the Scientific Research Startup Foundation of Hainan University
the Research and Development of Green Platform for Barrel-type Structures without Supporting Rods
the Hainan Provincial Natural Science Foundation Innovation Research Team Project
Subject
Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment,Geography, Planning and Development,Building and Construction
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