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DOI	10.1007/s11440-020-00952-6
	Investigation on frost heave of saturated-unsaturated soils
	Bai, Ruiqiang; Lai, Yuanming; Pei, Wansheng; Zhang, Mingyi
发表日期	2020
ISSN	1861-1125
EISSN	1861-1133
起始页码	3295
结束页码	3306
卷号	15 期号:11
英文摘要	Frost heave is a process of coupled heat-water-mechanics, which refers to heat transfer, water migration, water-ice phase change, deformation, etc. The mechanism of the frost heave for saturated-unsaturated soils was investigated to establish a frost heave model. As the freezing continues, for saturated soils, because all pores are filled with pore water, the total increased volume due to water migration and water crystallization will separate soil particles and induce frost heave. For unsaturated soils, because of the existence of unsaturated pores, volume expansion generates by water and vapor migration and water-ice transition will firstly fill into the unsaturated pores until a critical state is reached. After that, further increased volume will separate soil particles and induce frost heave. Therefore, effective strain ratio was introduced to establish the relationship between frost heave strain of unsaturated soils and the fields of moisture and temperature. Tests were carried out for silty soil. Then, based on the inverse theory, a simplified criterion was proposed to determine the effective strain ratio, and the effective strain ratio was back-calculated according to the test results. Finally, an innovative universal frost heave model for saturated-unsaturated soils was proposed.
英文关键词	Frost heave; Inverse theory; Saturated-unsaturated soils
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Geological
WOS关键词	HYDRAULIC CONDUCTIVITY ; NUMERICAL-ANALYSIS ; COUPLED WATER ; MODEL ; VAPOR ; TRANSPORT ; DAMAGE ; PERMAFROST ; MECHANISM ; BEHAVIOR
WOS记录号	WOS:000564424700001
来源期刊	ACTA GEOTECHNICA
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239579
作者单位	[Bai, Ruiqiang; Lai, Yuanming; Pei, Wansheng; Zhang, Mingyi] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Bai, Ruiqiang; Lai, Yuanming] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Bai, Ruiqiang,Lai, Yuanming,Pei, Wansheng,et al. Investigation on frost heave of saturated-unsaturated soils[J]. 中国科学院西北生态环境资源研究院,2020,15(11).
APA	Bai, Ruiqiang,Lai, Yuanming,Pei, Wansheng,&Zhang, Mingyi.(2020).Investigation on frost heave of saturated-unsaturated soils.ACTA GEOTECHNICA,15(11).
MLA	Bai, Ruiqiang,et al."Investigation on frost heave of saturated-unsaturated soils".ACTA GEOTECHNICA 15.11(2020).