The mechanisms behind shallow failures in slopes comprised of landslide deposits

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 > 山地灾害与地表过程重点实验室

	The mechanisms behind shallow failures in slopes comprised of landslide deposits
	Cui, Peng1 ; Guo, Chao-xu1,2 ; Zhou, Jia-wen 3,4; Hao, Ming-hui 3,4; Xu, Fu-gang 3,4
刊名	ENGINEERING GEOLOGY
	2014-10-08
卷号	180 期号:S1 页码:34-44
关键词	Landslide deposit Shallow failure Rainfall infiltration Surface runoff Fine particle migration
ISSN号	0013-7952
通讯作者	Peng Cui
英文摘要	In areas hit by the 2008 Wenchuan earthquake that occurred in Sichuan Province, China, debris flows are often generated from landslide deposits during heavy rainstorms. The broadly graded and unconsolidated landslide deposits respond to rainfall in very complex mechanical and hydraulic manners. An artificial rainfall test was conducted to simulate the rainfall infiltration and surface runoff processes occurring on the landslide deposit slope at the Wenjiagou Gully, China, with heavy rainfall rates (140 mm/h) incorporated. An innovative flume was designed to collect the slope interflow and surface runoff separately. Sensors to monitor the pore water content (PWP) and volumetric water content (VWC) were deployed. The results indicated that there were four stages in the hydrological response of landslide deposits during the artificial rain event: infiltration, a slow increase in interflow (surface runoff begins), a rapid increase in interflow (surface runoff slowly increases) and a steady state. Bed gradient increase will lead to PWP rapidly ascending and regressive failure happening. Concomitant with the observed increases in PWP and VWC, the shear strength of the landslide deposits decreased and led to the occurrence of small-scale shallow failures. Surface runoff, interflow and fine particle migration effects are presented to interpret the process of shallow failure. And although shallow slope failure is the result of interaction with the above three factors induced by rainfall, the key underlying factor is the characteristically loose structure of landslide deposits. (C) 2014 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Technology ; Physical Sciences
类目[WOS]	Engineering, Geological ; Geosciences, Multidisciplinary
研究领域[WOS]	Engineering ; Geology
关键词[WOS]	DEBRIS FLOW INITIATION ; WENCHUAN EARTHQUAKE ; RAINFALL ; CHINA ; SOIL ; AREA ; MOBILIZATION ; SICHUAN ; TAIWAN ; DAMAGE
收录类别	SCI
原文出处	http://www.sciencedirect.com/science/article/pii/S0013795214000908
语种	英语
WOS记录号	WOS:000344422700004
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/8059]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Surface Proc, Chengdu 610044, Sichuan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R China 4.Sichuan Univ, Coll Water Resources & Hydropower, Chengdu 610065, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Cui, Peng,Guo, Chao-xu,Zhou, Jia-wen,et al. The mechanisms behind shallow failures in slopes comprised of landslide deposits[J]. ENGINEERING GEOLOGY,2014,180(S1):34-44.
APA	Cui, Peng,Guo, Chao-xu,Zhou, Jia-wen,Hao, Ming-hui,&Xu, Fu-gang.(2014).The mechanisms behind shallow failures in slopes comprised of landslide deposits.ENGINEERING GEOLOGY,180(S1),34-44.
MLA	Cui, Peng,et al."The mechanisms behind shallow failures in slopes comprised of landslide deposits".ENGINEERING GEOLOGY 180.S1(2014):34-44.