Effects of sand and water contents on the small-strain shear modulus of loess

doi:10.1016/j.enggeo.2019.105202

	Effects of sand and water contents on the small-strain shear modulus of loess
	Liu, Xin 1; Zhang, Ning 1; Lan, Hengxing 1,2
刊名	ENGINEERING GEOLOGY
	2019-10-03
卷号	260 页码:7
关键词	Small-strain shear modulus Loess Sand content Water content
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2019.105202
通讯作者	Lan, Hengxing(lanhx@igsnrr.ac.cn)
英文摘要	Characterizing soil properties at small-strains (<10(-5)) is a subject of long-standing interest for geotechnical engineers at both academic and practical levels. Compared to conventional soil types, such as sand or clay, the small-strain properties of loess are less extensively studied and remain poorly understood. This paper presented an experimental study to investigate the influence of sand and water content on the small-strain shear modulus (G(0)) of Yan'an loess. A specifically designed experimental program was conducted for a sequence of sand-loess mixtures under unsaturated conditions using the resonant column technique. It was found that, in general, the G(0) of loess decreases with the water content. By using the water content as a state variable, its dependence on G(0) was established. The study also showed that under otherwise similar conditions, the G(0) of the sand-loess mixture is lower than that of loess without sand. However, a further increase of sand content beyond a threshold value (15%) induces no remarkable difference in terms of G(0). These findings suggested that the presence of sand plays an important role in the small-strain behaviours of loess. The underlying reasons behind these observations were provided, along with a detailed interpretation at the micro-scale level. To enhance the practicability, an empirical model was also proposed for sandy loess, and it could provide reasonable estimates of G(0) for both loess samples in the current study and loess data in the literature.
资助项目	National Natural Science Foundation of China[41525010] ; National Natural Science Foundation of China[41790443] ; National Natural Science Foundation of China[41807226] ; 111 Center, program of the Ministry of Education of China[B18046]
WOS关键词	PLATEAU ; LANZHOU
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000495469800006
资助机构	National Natural Science Foundation of China ; 111 Center, program of the Ministry of Education of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/131960]
专题	中国科学院地理科学与资源研究所
通讯作者	Lan, Hengxing
作者单位	1.Changan Univ, Sch Geol Engn & Geomat, Xian, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, LREIS, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xin,Zhang, Ning,Lan, Hengxing. Effects of sand and water contents on the small-strain shear modulus of loess[J]. ENGINEERING GEOLOGY,2019,260:7.
APA	Liu, Xin,Zhang, Ning,&Lan, Hengxing.(2019).Effects of sand and water contents on the small-strain shear modulus of loess.ENGINEERING GEOLOGY,260,7.
MLA	Liu, Xin,et al."Effects of sand and water contents on the small-strain shear modulus of loess".ENGINEERING GEOLOGY 260(2019):7.