A force transfer mechanism for triggering landslides during rainfall infiltration

doi:10.1007/s11629-018-5043-x

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2018 > Vol15 No.11

	A force transfer mechanism for triggering landslides during rainfall infiltration
	Liu, Gang; Tong, Fu-guo; Zhao, Yi-tong; Tian, Bin
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2018
卷号	15 期号:11 页码:2480-2491
关键词	Landslide Force transfer mechanism Rainfall infiltration Water-air two-phase flow
ISSN号	1672-6316
DOI	10.1007/s11629-018-5043-x
文献子类	Article
英文摘要	Shallow slope failures induced by rainfall infiltration occur frequently, and the relevant triggering mechanisms have been widely studied. Rainfall-induced landslides are widely recognized to be caused by increases in soil weight, seepage force and pore water pressure or decreases in soil mechanical properties. However, even when all these factors are considered, some landslides still cannot be explained well. The increased pore water pressure in a slope reduces the effective stress of the soil and may trigger slope failure. Similarly, the pore gas pressure in a slope also reduces the effective stress of the soil but has been neglected in previous studies. As the viscosity of air is nearly negligible when compared with that of water, the pore gas pressure spreads faster, and its influence is wider, which is harmful for the stability of the slope. In this paper, the effects of pore gas pressure are considered in a shallow slope stability analysis, and a self-designed experiment is conducted to validate the force transfer mechanism. Numerical simulation results show that the pore gas pressure in the slope increases sharply at different locations under heavy rainfall conditions and that the pore gas pressure causes a rapid decrease in the slope safety factor. Laboratory experimental results show that the pore gas pressure throughout the whole unsaturated zone has the same value, which indicates that the gas pressure could spread quickly to the whole sample.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000450458300012
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46349]
专题	Journal of Mountain Science_Journal of Mountain Science-2018_Vol15 No.11
推荐引用方式 GB/T 7714	Liu, Gang,Tong, Fu-guo,Zhao, Yi-tong,et al. A force transfer mechanism for triggering landslides during rainfall infiltration[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(11):2480-2491.
APA	Liu, Gang,Tong, Fu-guo,Zhao, Yi-tong,&Tian, Bin.(2018).A force transfer mechanism for triggering landslides during rainfall infiltration.JOURNAL OF MOUNTAIN SCIENCE,15(11),2480-2491.
MLA	Liu, Gang,et al."A force transfer mechanism for triggering landslides during rainfall infiltration".JOURNAL OF MOUNTAIN SCIENCE 15.11(2018):2480-2491.