Experimental study on response law and failure process of slopes in fully weathered granites under precipitation infiltration

doi:10.1007/s12665-021-09995-8

	Experimental study on response law and failure process of slopes in fully weathered granites under precipitation infiltration
	Qi, Xin 2,3; Li, Qinghua 2; Jiao, Yuyong 1,3; Tan, Fei 3
刊名	ENVIRONMENTAL EARTH SCIENCES
	2021-10-01
卷号	80 期号:20 页码:12
关键词	Fully weathered granite Precipitation infiltration Precipitation-induced landslide Matrix suction Weber similarity criterion
ISSN号	1866-6280
DOI	10.1007/s12665-021-09995-8
英文摘要	To investigate the response law and failure process of slopes in fully weathered granites under precipitation infiltration, a typical fully weathered granite slope is selected for sampling in South China. The physical simulation experimental study of rainfall-induced landslide is conducted, in which Weber criterion is used as the similarity criterion for precipitation. The research results reveal that under precipitation infiltration, the fully weathered granite slope responds quickly. Further, the water content increases sharply, and the matrix suction quickly dissipates. After dissipation, the matrix suction transforms into pore water pressure, which accelerates the deformation of the slope. The wet peak has a large infiltration depth in the slope, and the acceleration of the deep part is lower than that of the shallow part. Under the action of precipitation, the fully weathered granite model undergoes four stages of failure. Firstly, gullies and cracks appear; secondly, cracks propagate and link up; then, the soil on the slope surface swells and ruptures; and finally, the slope slides locally until the entire slope creeps, collapses, and transforms into a "soil flow". It shows that the landslide will be triggered in fully weathered granite slope by precipitation when the precipitation intensity comes up to 155 mm/d, and the landslide occurs at an accumulated precipitation of 304 mm based on the analysis of precipitation similarity. Overall, the results can provide a reliable theoretical basis and abundant experimental data for the prevention, monitoring, and forecasting of geological disasters in granitic areas.
资助项目	Hubei Provincial Natural Science Foundation[2016CFA023] ; China Geological Survey Project Foundation[DD20221734] ; China Geological Survey Project Foundation[DD20160257] ; China Geological Survey Project Foundation[DD20190304]
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000702981600003
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28528]
专题	中科院武汉岩土力学所
通讯作者	Tan, Fei
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, Natl Key Lab Geomech & Geotech Engn, Wuhan, Peoples R China 2.China Geol Survey, Wuhan Ctr, Wuhan, Peoples R China 3.China Univ Geosci, Fac Engn, Wuhan, Peoples R China
推荐引用方式 GB/T 7714	Qi, Xin,Li, Qinghua,Jiao, Yuyong,et al. Experimental study on response law and failure process of slopes in fully weathered granites under precipitation infiltration[J]. ENVIRONMENTAL EARTH SCIENCES,2021,80(20):12.
APA	Qi, Xin,Li, Qinghua,Jiao, Yuyong,&Tan, Fei.(2021).Experimental study on response law and failure process of slopes in fully weathered granites under precipitation infiltration.ENVIRONMENTAL EARTH SCIENCES,80(20),12.
MLA	Qi, Xin,et al."Experimental study on response law and failure process of slopes in fully weathered granites under precipitation infiltration".ENVIRONMENTAL EARTH SCIENCES 80.20(2021):12.