Research on frost heave mitigation based on the control of the movement of the freezing front

被引：0
|
作者：
Ji Y. [1 ]
Wang H. [1 ]
Zhou G. [1 ]
Zhao X. [1 ]
Wang Q. [2 ]
Li R. [1 ]
机构：
[1] State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Jiangsu, Xuzhou
[2] School of Civil Engineering and Architecture, Southwest University of Science and Technology, Sichuan, Mianyang
来源：
Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology | 2023年 / 52卷 / 05期
关键词：
freezing front; frost heave mitigation; frozen fringe; frozen soil; ice lens growth;
D O I：
10.13247/j.cnki.jcumt.20230008
中图分类号：
学科分类号：
摘要：
Excess frost heave and the ground deformation caused by frost heave pressure can lead to the failure of engineering structures when the artificial freezing method is used in underground engineering construction. Providing a frost heave control method and revealing the growth inhibition mechanism of the ice lens are an important way to develop the artificial ground freezing technology. Based on the exist mathematical model of ice lens growth rate related to ice saturation and permeability, the effect of frozen fringe thickness on the growth rate of ice lens is obtained. The results show that the growth of the ice lens is strongly dependent on the geometry structure of the frozen fringe, and the narrowing of the frozen fringe directly inhibits the growth of the ice lens. Considering the influence of the frozen fringe thickness on the growth mechanisms of ice lens, a freezing front control method is proposed as a new artificial freezing technical ideas, and the corresponding intelligent control system and experimental platform are innovated. The newly proposed freezing technical ideas can effectively activate the intermittent growth of the ice lens and realize the control of frost heave. The results show reduction of freezing depth or improvement of cold-end temperature can effectively retard the growth of ice lens and the development of frost heave. © 2023 China University of Mining and Technology. All rights reserved.
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页码：943 / 951
页数：8
相关论文
共 30 条
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