The Effect of Hydraulic Hysteresis on the Shear Strength of Clayey Soils under Partially Saturated States

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	The Effect of Hydraulic Hysteresis on the Shear Strength of Clayey Soils under Partially Saturated States
	Lu Haifeng 1,2; Chen Pan 1
	2017
会议日期	MAR 25-25, 2017
会议地点	Guangzhou, PEOPLES R CHINA
关键词	Unsaturated soil soil-water retention hydraulic hysteresis clayey soil shear strength
卷号	124
页码	154-161
英文摘要	Hydraulic hysteresis is a common phenomenon in unsaturated soils. The soil-water retention curve from the drying process is different from the one from the wetting process due to the effect of hydraulic hysteresis. The soil strength is strongly affected by the soil-water characteristics. Hence, hydraulic hysteresis can have an important effect on the shear strength of a soil. The direct shear tests under the drying and wetting conditions were done to explore the effect mechanism of the hydraulic paths on the shear strength of clayey soils. The results show that shear strengths of the clayey soils have the obviously peak values at low water contents for the drying paths. And the strain softening characteristics of the clayey soils are exhibited. However, the strain hardening is exhibited under high water content conditions for the drying paths. The strain hardening is always occurred for the wetting paths. The shear strengths of the clayey soils are obviously different from the wetting and drying paths although the water content of the samples and loaded normal stress are the same. The shear strength loss ratio,. is introduced to quantify the difference of shear strength of clayey soils under different hydraulic paths. The shear strength loss ratio is between 8% and 18%, which shows that hydraulic hysteresis has an important influence on the shear strength of clayey soils.
会议录	PROCEEDINGS OF THE 2017 2ND INTERNATIONAL SYMPOSIUM ON ADVANCES IN ELECTRICAL, ELECTRONICS AND COMPUTER ENGINEERING (ISAEECE 2017)
会议录出版者	ATLANTIS PRESS
会议录出版地	PARIS
语种	英语
WOS研究方向	Engineering
WOS记录号	WOS:000417221100029
内容类型	会议论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4930]
专题	岩土力学所知识全产出_会议论文国家重点实验室知识产出_会议论文
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 2.Univ Chinese Acad Sci
推荐引用方式 GB/T 7714	Lu Haifeng,Chen Pan. The Effect of Hydraulic Hysteresis on the Shear Strength of Clayey Soils under Partially Saturated States[C]. 见:. Guangzhou, PEOPLES R CHINA. MAR 25-25, 2017.