Effects of freeze-thaw cycle and dry-wet alternation on slope stability

doi:10.3724/SP.J.1226.2019.00159

IR > 土木工程学院

	Effects of freeze-thaw cycle and dry-wet alternation on slope stability
	Chou, YaLing1 ; Sun, LiYuan 1; Li, BaoAn 2; Wang, XiaoLi 2
	2019-04-01
发表期刊	SCIENCES IN COLD AND ARID REGIONS
ISSN	1674-3822
卷号	11 期号:2 页码:159-172
摘要	The typical loess on high slopes along the BaoLan High-speed Rail, China, was selected as the research object. The influence of the freeze-thaw cycle and dry-wet alternation on the shear-strength parameters of the unsaturated loess was investigated by laboratory experimental methods. Moreover, the temperature field, seepage field, and stability of slopes with different gradients were simulated under the effect of the freeze-thaw cycle and dry-wet alternation by using the geotechnical analysis software Geo-Studio. The research results showed (1) when the freeze-thaw cycle was repeated on the slope, with the frozen depth increasing, the melted depth did the same; besides, the closed loop of isotherms formed on the slope; (2) under the action of dry-wet circulation, the negative pore-water pressure and volumetric water content showed an upward tendency. However, owing to the different slope gradients, rainfall infiltration was not the same. As time went by, the differences of the negative pore-water pressure and volumetric water content between the slopes of different gradients continued to increase; (3) with the freeze-thaw cycle and dry-wet alternation increasing, the slope-safety factor decreased. Especially in the early period, the slope-safety factor changed remarkably. For slopes undergoing freeze-thaw action, the slope-safety factor was negatively correlated with the gradient. However, with regard to slopes undergoing dry-wet alternation, the result became more complex because the slope-safety factor was related to both seepage strength and slope grade. Accordingly, further research is needed to study the effect of seepage strength and slope grade on the stability of loess slopes.
关键词	freeze-thaw action dry-wet alternation temperature field seepage field slope stability
DOI	10.3724/SP.J.1226.2019.00159
收录类别	ESCI
语种	英语
WOS研究方向	Physical Geography
WOS类目	Geography, Physical
WOS记录号	WOS:000466177400006
出版者	SCIENCE PRESS
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/155650
专题	土木工程学院
通讯作者	Chou, YaLing
作者单位	1.Lanzhou Univ Technol, Sch Civil Engn, 287 Langongping Rd, Lanzhou 730000, Gansu, Peoples R China; 2.Jiangsu JiaoTong Traff Design Res Inst Co Ltd, Huaian 223002, Jiangsu, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Chou, YaLing,Sun, LiYuan,Li, BaoAn,et al. Effects of freeze-thaw cycle and dry-wet alternation on slope stability[J]. SCIENCES IN COLD AND ARID REGIONS,2019,11(2):159-172.
APA	Chou, YaLing,Sun, LiYuan,Li, BaoAn,&Wang, XiaoLi.(2019).Effects of freeze-thaw cycle and dry-wet alternation on slope stability.SCIENCES IN COLD AND ARID REGIONS,11(2),159-172.
MLA	Chou, YaLing,et al."Effects of freeze-thaw cycle and dry-wet alternation on slope stability".SCIENCES IN COLD AND ARID REGIONS 11.2(2019):159-172.