中国科学院机构知识库网格系统: Properties and microstructure of a natural slip zone in loose deposits of red beds, southwestern China

Properties and microstructure of a natural slip zone in loose deposits of red beds, southwestern China

文献类型：期刊论文


作者	Chen, Jian 1; Dai, Fuchu 2; Xu, Ling 2; Chen, Song 1; Wang, Pengfei 1; Long, Wei 1; Shen, Naiqi 1
刊名	ENGINEERING GEOLOGY
出版日期	2014-12-09
卷号	183 页码:53-64
ISSN号	0013-7952
关键词	Properties Microstructure Residual soil Slip zone Mechanism
DOI	10.1016/j.enggeo.2014.10.004
文献子类	Article
英文摘要	The loose deposits of red beds located in southwestern China are vulnerable to the occurrence of landslides. In this paper, a shallow progressive landslide developed in loose deposits of red beds was selected as a case study, and the physical and mechanical properties of the main slip zone were analyzed in detail. It was observed that the main slip zone of the progressive landslide is composed of fine-grained soils with substantial amounts of expansive clay particles (interlayered illite/smectite and interlayered chlorite-smectite). The one-dimensional consolidation test of the residual soils shows that the soils are overconsolidated. The shear stress versus shear displacement curves reveal that the slip zone soil has exhibited a strain softening behavior. The residual friction angle of the undisturbed slip zone soil determined by the ring shear tests is 7.2 degrees, indicating that the residual strength of the soil is very low when in a saturated state. The microstructure of the slip zone was investigated using a combination of images captured by means of polarising microscopy (PM) and scanning electron microscope (SEM) techniques. It was found that the slip zone possessed generally softer structure with higher relative porosities than its confining materials. The microstructure of the slip zone is generally characterized by its softer structure and higher degree of alignment of fine silts, suggesting that the slip zone underwent two deformation processes (i.e. dilatancy and particle rearrangement). The global mechanical behavior of the investigated slip zone may be conceptualized as an overconsolidated clayey soil under drained conditions. (C) 2014 Elsevier B.V. All rights reserved.
WOS关键词	DRAINED RESIDUAL STRENGTH ; COHESIVE SOILS ; INDEX PROPERTIES ; GORGES AREA ; LANDSLIDE ; FAILURE ; CALIFORNIA ; MECHANISM ; SURFACE ; CLAYS
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000347591200005
资助机构	National Natural Science Foundation of China(41230743 ; National Natural Science Foundation of China(41230743 ; Fundamental Research Funds for the Central Universities(2011YXL054) ; Fundamental Research Funds for the Central Universities(2011YXL054) ; 40901005) ; 40901005) ; National Natural Science Foundation of China(41230743 ; National Natural Science Foundation of China(41230743 ; Fundamental Research Funds for the Central Universities(2011YXL054) ; Fundamental Research Funds for the Central Universities(2011YXL054) ; 40901005) ; 40901005) ; National Natural Science Foundation of China(41230743 ; National Natural Science Foundation of China(41230743 ; Fundamental Research Funds for the Central Universities(2011YXL054) ; Fundamental Research Funds for the Central Universities(2011YXL054) ; 40901005) ; 40901005) ; National Natural Science Foundation of China(41230743 ; National Natural Science Foundation of China(41230743 ; Fundamental Research Funds for the Central Universities(2011YXL054) ; Fundamental Research Funds for the Central Universities(2011YXL054) ; 40901005) ; 40901005)
源URL	[http://ir.iggcas.ac.cn/handle/132A11/85972]
专题	中国科学院地质与地球物理研究所
通讯作者	Chen, Jian
作者单位	1.China Univ Geosci, Sch Engn & Technol, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Div Tibet Plateau, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Chen, Jian,Dai, Fuchu,Xu, Ling,et al. Properties and microstructure of a natural slip zone in loose deposits of red beds, southwestern China[J]. ENGINEERING GEOLOGY,2014,183:53-64.
APA	Chen, Jian.,Dai, Fuchu.,Xu, Ling.,Chen, Song.,Wang, Pengfei.,...&Shen, Naiqi.(2014).Properties and microstructure of a natural slip zone in loose deposits of red beds, southwestern China.ENGINEERING GEOLOGY,183,53-64.
MLA	Chen, Jian,et al."Properties and microstructure of a natural slip zone in loose deposits of red beds, southwestern China".ENGINEERING GEOLOGY 183(2014):53-64.

入库方式： OAI收割

来源：地质与地球物理研究所

下载0

Properties and microstructure of a natural slip zone in loose deposits of red beds, southwestern China

其他版本