Influence of structure on the behavior of a saturated clayey loess

doi:10.1139/cgj-2015-0200

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	Influence of structure on the behavior of a saturated clayey loess
	Xu, L.1,2,3; Coop, M. R.3
刊名	CANADIAN GEOTECHNICAL JOURNAL
	2016-06-01
卷号	53 期号:6 页码:1026-1037
关键词	compressibility shear strength fabric structure of soils laboratory tests
DOI	10.1139/cgj-2015-0200
文献子类	Article
英文摘要	An intensive experimental investigation by means of triaxial and oedometer tests was performed on a clayey loess that was retrieved from two depths at a location on the southern Chinese Loess Plateau. Intact and reconstituted samples were used to identify the effects of the natural structure on soil behavior in saturated conditions. The behavior in compression was clearly affected by structure with the intact samples reaching well-defined gross yield points outside the intrinsic compression line of the reconstituted soil, after which the compression paths converged towards the intrinsic compression lines, behavior which is consistent with destructuration. However, very high stresses were required to give complete convergence. Similarly the triaxial tests that were carried out at lower stress levels also did not give convergence of the critical states so that different critical state lines could be defined for the intact and reconstituted soils. This was consistent with qualitative observations from scanning electron micrographs that natural elements of fabric and possibly bonding persisted even after triaxial shearing. The effects of structure at the two depths on the compression and shearing behavior were slightly larger for the shallower samples. Despite the very different genesis of the soils, it was found that similar frameworks could be applied to those used for sedimentary clays and that the degree of structure was equivalent to a clay of medium sensitivity.
WOS关键词	TRANSITIONAL BEHAVIOR ; TRIAXIAL TESTS ; NATURAL LOESS ; COMPRESSION ; CHINA ; SOILS ; MECHANICS ; DEPOSITS ; LANZHOU
WOS研究方向	Engineering ; Geology
语种	英语
WOS记录号	WOS:000377307700011
资助机构	Natural Science Foundation of China(51109199) ; Natural Science Foundation of China(51109199) ; Natural Science Foundation of China(51109199) ; Natural Science Foundation of China(51109199) ; Hong Kong Scholars Program ; Hong Kong Scholars Program ; Hong Kong Scholars Program ; Hong Kong Scholars Program ; Natural Science Foundation of China(51109199) ; Natural Science Foundation of China(51109199) ; Natural Science Foundation of China(51109199) ; Natural Science Foundation of China(51109199) ; Hong Kong Scholars Program ; Hong Kong Scholars Program ; Hong Kong Scholars Program ; Hong Kong Scholars Program
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53441]
专题	地质与地球物理研究所_其他部门
作者单位	1.Xi An Jiao Tong Univ, Xian 710049, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.City Univ Hong Kong, Hong Kong, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Xu, L.,Coop, M. R.. Influence of structure on the behavior of a saturated clayey loess[J]. CANADIAN GEOTECHNICAL JOURNAL,2016,53(6):1026-1037.
APA	Xu, L.,&Coop, M. R..(2016).Influence of structure on the behavior of a saturated clayey loess.CANADIAN GEOTECHNICAL JOURNAL,53(6),1026-1037.
MLA	Xu, L.,et al."Influence of structure on the behavior of a saturated clayey loess".CANADIAN GEOTECHNICAL JOURNAL 53.6(2016):1026-1037.