Characteristics of matric suction in unequal sized quartz silt during horizontal freezing

被引：0
作者：
Tianxiao Tang
Yupeng Shen
Mo Chen
Xin Liu
Yue Liu
Jingfu Guo
机构：
[1] Beijing Jiaotong University,School of Civil Engineering
[2] Anhui Jianzhu University,College of Civil Engineering
[3] Beijing Key Laboratory of Track Engineering,Technical Quality Department
[4] Beijing Jiaotong University,undefined
[5] Avic Institute of Geotechnical Engineering Co. LTD.,undefined
[6] Heilongjiang General Institute of Ecological Survey and Research,undefined
来源：
Bulletin of Engineering Geology and the Environment | 2022年 / 81卷
关键词：
Horizontal freezing; Quartz silt; Matric suction; Freeze–thaw cycles; Hysteresis;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Methods to correctly predict changes in matric suction greatly benefit the study of water migration in frozen soils. Current research on the matric suction mechanism and how it is influenced by external factors under horizontal freezing action is limited, and differences in matric suction in various freezing zones are usually ignored. In this paper, a connection between the microscopic and macroscopic water contents is established, and equations for calculating the matric suction of unequal sized particles are derived. Then, experiments are conducted to explore changes of matric suction in different freezing zones during horizontal freezing. Using experimental data, the correctness of the equations is verified, the sensitivity of matric suction to temperature and water content is explored, and the influence of the temperature, external loads, freeze–thaw cycles, and initial water content on water migration in frozen soil is studied. Finally, the development of matric suction in quartz silt during horizontal freezing is discussed and summarized based on experimental analyses and previous research. The results can provide important guidance for understanding the water migration mechanism of horizontal freezing and optimizing prevention measures for damage caused by horizontal freezing.
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