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Analysis of a progressive slope failure in the Xiangjiaba reservoir area, Southwest China

文献类型：期刊论文

作者Xu, Ling1; Dai, Fuchu1; Chen, Jian2; Iqbal, Javed1,3; Qu, Yongxin1
刊名LANDSLIDES
出版日期2014-02-01
卷号11期号:1页码:55-66
ISSN号1612-510X
关键词Landslide Progressive failure Fractures Cut slope
DOI10.1007/s10346-012-0373-1
文献子类Article
英文摘要The rehabilitation construction in the reservoir area of Xiangjiaba hydropower station in Southwest China has caused many landslides. A shallow progressive failure that occurred on the resettlement site of Xin'an Town of Pingshan County in Sichuan Province was selected as a case study. This landslide occurred in a long and gently inclined area by slope excavation under rainfall conditions. It is about 3.0 m deep with a total length of 35 m and is composed of some subfailures. Undisturbed samples were retrieved, on which the basic properties, shear strength, expansive potential, mineral compositions, and microstructures were tested and analyzed. The results show (1) the landsliding materials belong to medium expansive soil, consisting of the clay minerals of illite-smectite (I/S) and chlorite-smectite (C/S); (2) shear strength of the soil is sensitive to water, which greatly decreases once saturated; and (3) many fractures and relatively large pores are developed in the soils. Back analysis of the landslide shows that the shear strength at failure is less than the residual shear strength obtained from lab tests, indicating that some processes contributing to the slope failure could not be reflected by the shear box test. Based on the above analysis, the progressive process of the slope failure was interpreted, and it is inferred that the rainfall entered into the slope mainly through fractures and relatively large pores in the soil. It caused not only the great decrease in soil strength but also the swelling trend. The latter one would lead to growth, interaction, and coalescence of the fractures. Soon after, these fractures formed the shear planes (zones), which further decreased the resistance of the landslide. Under these favorable conditions, the slope excavation directly triggered the failure.
WOS关键词EXPANSIVE SOIL ; ROCK SLOPES ; LANDSLIDE ; SHRINKAGE ; STRENGTH ; LOESS ; EDGE
WOS研究方向Engineering ; Geology
语种英语
出版者SPRINGER HEIDELBERG
WOS记录号WOS:000331004000005
资助机构National Nature Science Foundation of China (NSFC)(51109199) ; National Nature Science Foundation of China (NSFC)(51109199) ; National Nature Science Foundation of China (NSFC)(51109199) ; National Nature Science Foundation of China (NSFC)(51109199) ; National Nature Science Foundation of China (NSFC)(51109199) ; National Nature Science Foundation of China (NSFC)(51109199) ; National Nature Science Foundation of China (NSFC)(51109199) ; National Nature Science Foundation of China (NSFC)(51109199) ; National Nature Science Foundation of China (NSFC)(51109199) ; National Nature Science Foundation of China (NSFC)(51109199) ; National Nature Science Foundation of China (NSFC)(51109199) ; National Nature Science Foundation of China (NSFC)(51109199) ; National Nature Science Foundation of China (NSFC)(51109199) ; National Nature Science Foundation of China (NSFC)(51109199) ; National Nature Science Foundation of China (NSFC)(51109199) ; National Nature Science Foundation of China (NSFC)(51109199)
源URL[http://ir.iggcas.ac.cn/handle/132A11/86098]  
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.China Univ Geosci, Sch Engn & Technol, Beijing 100083, Peoples R China
3.COMSATS Inst Informat Technol, Dept Earth Sci, Abbottabad, Pakistan
推荐引用方式
GB/T 7714		 Xu, Ling,Dai, Fuchu,Chen, Jian,et al. Analysis of a progressive slope failure in the Xiangjiaba reservoir area, Southwest China[J]. LANDSLIDES,2014,11(1):55-66.
APA Xu, Ling,Dai, Fuchu,Chen, Jian,Iqbal, Javed,&Qu, Yongxin.(2014).Analysis of a progressive slope failure in the Xiangjiaba reservoir area, Southwest China.LANDSLIDES,11(1),55-66.
MLA Xu, Ling,et al."Analysis of a progressive slope failure in the Xiangjiaba reservoir area, Southwest China".LANDSLIDES 11.1(2014):55-66.

入库方式： OAI收割

来源：地质与地球物理研究所

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