Landslides in the Transitional Slopes between a Loess Platform and River Terrace, Northwest China

	Landslides in the Transitional Slopes between a Loess Platform and River Terrace, Northwest China
	Xu, Ling 1; Dai, Fuchu 1; Tham, Leslie George 2; Tu, Xinbin 1; Jin, Yanli 3
刊名	ENVIRONMENTAL & ENGINEERING GEOSCIENCE
	2011-08-01
卷号	17 期号:3 页码:267-279
关键词	Landslide Loess Platform Agricultural Irrigation Groundwater Table Rise
ISSN号	1078-7275
文献子类	Article
英文摘要	Irrigation-induced loess landslides are common in the transitional slopes between loess platforms and river terraces in northwest China. A typical area of the south Jingyang platform, Shaanxi Province, was selected to investigate such phenomena. Approximately 50 landslides involving loess flowslides and loess slides have occurred since the irrigation of this platform began in 1976. Flowslides can travel a long runout distance at high speed and show a small apparent friction angle. Due to long-term irrigation, the groundwater table in the study area has been substantially raised. To clarify the failure mechanism of loess under these conditions, anisotropically consolidated undrained triaxial tests (ACU) and constant shear drained tests (CSD) were conducted on undisturbed specimens retrieved from the study area. The test results revealed that loess exhibited a sudden collapse behavior with the increase of porewater pressure in a drained condition. The resultant loss of strength in an undrained condition was related to the development of pore-water pressure that reduced the effective stress. For a flowslide, we conclude that the groundwater rises first and causes the collapse of loess in the bottom portion of the slope, which then leads to undrained mobilization. Following the initiation, excess pore-water pressure is generated near the contact between sliding material and river terrace, leading to mobility of the flowslide.
WOS研究方向	Engineering ; Geology
语种	英语
出版者	GEOLOGICAL SOC AMER, INC
WOS记录号	WOS:000295212000005
资助机构	Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E) ; Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E) ; Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E) ; Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E) ; Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E) ; Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E) ; Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E) ; Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E) ; Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E) ; Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E) ; Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E) ; Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E) ; Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E) ; Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E) ; Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E) ; Research Grants Council, HKSARG, The Government of the Hong Kong Special Administrative Region, China(HKU7140/08E)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/74510]
专题	中国科学院地质与地球物理研究所
通讯作者	Xu, Ling
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Hong Kong, Dept Civil Engn, Hong Kong, Hong Kong, Peoples R China 3.Reconnaissance & Design Inst Guangxi Power Ind, Nanning 530000, Guangxi Provinc, Peoples R China
推荐引用方式 GB/T 7714	Xu, Ling,Dai, Fuchu,Tham, Leslie George,et al. Landslides in the Transitional Slopes between a Loess Platform and River Terrace, Northwest China[J]. ENVIRONMENTAL & ENGINEERING GEOSCIENCE,2011,17(3):267-279.
APA	Xu, Ling,Dai, Fuchu,Tham, Leslie George,Tu, Xinbin,&Jin, Yanli.(2011).Landslides in the Transitional Slopes between a Loess Platform and River Terrace, Northwest China.ENVIRONMENTAL & ENGINEERING GEOSCIENCE,17(3),267-279.
MLA	Xu, Ling,et al."Landslides in the Transitional Slopes between a Loess Platform and River Terrace, Northwest China".ENVIRONMENTAL & ENGINEERING GEOSCIENCE 17.3(2011):267-279.