Physicochemical effect on shear strength characteristics of clayey soils based on ring-shear experiment

doi:10.1139/cgj-2019-0513

	Physicochemical effect on shear strength characteristics of clayey soils based on ring-shear experiment
	Yao, Chuanqin 1,3; Chen, Pan 1,3; Ma, Tiantian 1,3; Xia, Xiaolong 2; Wei, Changfu 1,3
刊名	CANADIAN GEOTECHNICAL JOURNAL
	2020-12-01
卷号	57 期号:12 页码:1820-1831
关键词	shear strength ring shear test saline solution intergranular stress clayey soils
ISSN号	0008-3674
DOI	10.1139/cgj-2019-0513
英文摘要	Pore fluid chemistry can significantly influence the shear strength characteristics of a clayey soil. To explore the underlying mechanisms, a series of ring shear experiments are performed on two natural clays, which represent two typical types of clayey minerals, i.e., expansive montmorillonitic clay and low-plasticity kaolinitic clay. The effects of pore solution concentrations on the shear strength of the two clays are experimentally characterized. It is shown that the shear strength of the expansive clay can be significantly influenced by the pore solution chemistry, whereas that of the low-plasticity clay proves to be relatively insensitive to it. To capture the main features of the shear strength behavior of clayey soils, the concept of intergranular stress, which is an extension of the Terzaglirs effective stress to incorporate physicochemical effect, is introduced to interpret the experimental data. It is found that the evolution of residual shear strength can be very well characterized by using the intergranular stress, showing that the proposed intergranular stress formulation can be used alternatively to describe the stress state of clayey soils saturated with various pore solutions.
资助项目	National Natural Science Foundation of China[51939011] ; National Natural Science Foundation of China[51639008] ; National Natural Science Foundation of China[41877269]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	CANADIAN SCIENCE PUBLISHING
WOS记录号	WOS:000592808100002
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25242]
专题	中科院武汉岩土力学所
通讯作者	Wei, Changfu
作者单位	1.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech, Wuhan 430071, Hubei, Peoples R China 2.Missouri Univ Sci & Technol, Dept Civil Architectural & Environm Engn, Rolla, MO 65409 USA 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yao, Chuanqin,Chen, Pan,Ma, Tiantian,et al. Physicochemical effect on shear strength characteristics of clayey soils based on ring-shear experiment[J]. CANADIAN GEOTECHNICAL JOURNAL,2020,57(12):1820-1831.
APA	Yao, Chuanqin,Chen, Pan,Ma, Tiantian,Xia, Xiaolong,&Wei, Changfu.(2020).Physicochemical effect on shear strength characteristics of clayey soils based on ring-shear experiment.CANADIAN GEOTECHNICAL JOURNAL,57(12),1820-1831.
MLA	Yao, Chuanqin,et al."Physicochemical effect on shear strength characteristics of clayey soils based on ring-shear experiment".CANADIAN GEOTECHNICAL JOURNAL 57.12(2020):1820-1831.