气候变化领域集成服务门户(CCPortal): Analysis of loess landslide mechanism and numerical simulation stabilization on the Loess Plateau in Central China

CCPortal

DOI	10.1007/s11069-020-04492-w
	Analysis of loess landslide mechanism and numerical simulation stabilization on the Loess Plateau in Central China
	Xie W.-L.; Guo Q.; Wu J.Y.; Li P.; Yang H.; Zhang M.
发表日期	2021
ISSN	0921030X
起始页码	805
结束页码	827
卷号	106 期号:1
英文摘要	Loess landslides have complicated deformation mechanisms. Accurately describing the internal failure deformation of loess landslides and establishing a theoretical method of landslide instability evaluation for the prevention of subsequent landslides have become important topics in western development project construction in China. This paper presents a case study of the Zhonglou Mountain landslide in Shaanxi Province, China. Based on field investigation results, a two-dimensional stability analysis model was constructed using the finite element method. Taking the deformation characteristics of the landslide as the research basis, the distribution laws of the displacement, stress, and shear strain of this landslide were identified with the strength reduction finite element numerical simulation method. Additionally, the safety factor was evaluated under normal and storm conditions. The numerical simulation results show that the horizontal tensile stress of the landslide was mainly distributed in the middle and upper parts of the landslide under normal conditions, while the vertical tensile stress was distributed near the sliding surface. Under heavy rainfall, the sliding force increased, and the anti-sliding force and anti-sliding section decreased; the location of the maximum shear strain shifted down from the middle and upper parts of the landslide body to the area with a shear crack, and the plastic shear strain area expanded along nearly the entire the sliding surface, leading to the occurrence of a landslide. Thus, the use of anti-slide piles to stabilize the landslide was proposed and tested. Monitoring points were arranged along the sliding surface to evaluate the displacement, stress, and strain responses. The on-site observation results agreed with the modeling results. The use of anti-slide piles was demonstrated to be an effective stabilization method for the Zhonglou Mountain landslide. © 2021, The Author(s).
关键词	Anti-slide pile Failure mechanism Landslide stabilization Loess landslide Safety factor
英文关键词	deformation mechanism; failure mechanism; landslide; loess; numerical model; pile; safety; stabilization; China; Loess Plateau; Shaanxi
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206673
作者单位	State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an, Shaanxi 710069, China; Key Laboratory for Geo-Hazards in Loess Area, Ministry of Land and Resources, Xi’an Center of China Geological Survey, Xi’an, 710054, China; Shaanxi Hydrogeology Engineering Geology and Environment Geology Survey Center, Xi’an, Shaanxi 710068, China
推荐引用方式 GB/T 7714	Xie W.-L.,Guo Q.,Wu J.Y.,et al. Analysis of loess landslide mechanism and numerical simulation stabilization on the Loess Plateau in Central China[J],2021,106(1).
APA	Xie W.-L.,Guo Q.,Wu J.Y.,Li P.,Yang H.,&Zhang M..(2021).Analysis of loess landslide mechanism and numerical simulation stabilization on the Loess Plateau in Central China.Natural Hazards,106(1).
MLA	Xie W.-L.,et al."Analysis of loess landslide mechanism and numerical simulation stabilization on the Loess Plateau in Central China".Natural Hazards 106.1(2021).