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DOI	10.1016/j.coldregions.2024.104150
	Strength criterion of ice-rich moraine soil considering the ice form and temperature based on thermal-mechanical triaxial tests
	Wang, Rui; Li, Changdong; Gu, Dongming; Thaw, Nang Mon Mon; Wang, Jiao
发表日期	2024
ISSN	0165-232X
EISSN	1872-7441
起始页码	220
卷号	220
英文摘要	Moraine soils are widely distributed in southeast Tibet of China, which poses a serious threat to local railway construction. The mechanical behavior of moraine soil containing ice in cold regions is difficult to capture under the joint action of stress conditions and temperature. To study the strength characteristics of ice-rich moraine soil, a total of 112 groups of thermal-mechanical triaxial tests under different ice forms, ice contents, and temperature conditions are carried out. The test results show that the mechanical properties of moraine soil with crushed ice and block ice are different, showing the characteristics of strain hardening and strain softening, respectively. Overall, the peak strength of moraine soil with block ice is greater than that of crushed ice. The cohesion and internal friction angle of moraine soil decreases with the temperature rise. With the increase of ice content, the peak strength of moraine soil with block ice increases, while that of crushed ice shows the opposite trend. In addition, the increase of ice content increases the cohesion of moraine soil with block ice, but there is a threshold value of ice content (25%) for moraine soil with crushed ice, which leads to the maximum cohesion at this time. Based on the test results, a unified function is proposed to describe the quantitative relationship between the strength parameters of ice-rich moraine soil, temperature, and ice content. Finally, to explore the nonlinear strength behavior of moraine soil, a binary-medium model is introduced to describe its stress-strain relationship, and the evolution of the main parameters in the model is analyzed. Comparing theoretical and experimental results demonstrates that the established model is of satisfactory applicability to simulate the mechanical behavior of moraine soil with different ice forms.
英文关键词	Moraine soil; Triaxial testing; Ice form; Mechanical behavior; Binary-medium model
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS记录号	WOS:001204462100001
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303537
作者单位	China University of Geosciences; China University of Geosciences; Chinese Academy of Sciences; Institute of Mountain Hazards & Environment, CAS
推荐引用方式 GB/T 7714	Wang, Rui,Li, Changdong,Gu, Dongming,et al. Strength criterion of ice-rich moraine soil considering the ice form and temperature based on thermal-mechanical triaxial tests[J],2024,220.
APA	Wang, Rui,Li, Changdong,Gu, Dongming,Thaw, Nang Mon Mon,&Wang, Jiao.(2024).Strength criterion of ice-rich moraine soil considering the ice form and temperature based on thermal-mechanical triaxial tests.COLD REGIONS SCIENCE AND TECHNOLOGY,220.
MLA	Wang, Rui,et al."Strength criterion of ice-rich moraine soil considering the ice form and temperature based on thermal-mechanical triaxial tests".COLD REGIONS SCIENCE AND TECHNOLOGY 220(2024).