干旱区生态环境知识资源中心(Arid): Simple Testing Method for Measuring the Triaxial Stress-Strain Relations of Unsaturated Soils at High Suctions

Arid

DOI	10.1520/GTJ20190278
	Simple Testing Method for Measuring the Triaxial Stress-Strain Relations of Unsaturated Soils at High Suctions
	Chen, Bo; Gao, You; Sun, De'an; Li, Jie
通讯作者	Gao, Y (corresponding author), Ningbo Univ, Sch Civil & Environm Engn, 818 Fenghua Rd, Ningbo 315211, Peoples R China.
来源期刊	GEOTECHNICAL TESTING JOURNAL
ISSN	0149-6115
EISSN	1945-7545
出版年	2021
卷号	44 期号:2 页码:535-546
英文摘要	Unsaturated soils at high suctions are widespread in arid and semiarid areas. Test data on the mechanical behavior of unsaturated soils are scarce at high suctions. In this article, the effect of void ratio or density on the soil-water retention behavior was discussed on the basis of measured data of various compacted soils at high suctions. According to the test data, the soil-water retention behavior is independent of the dry density or void ratio over a high suction range, namely, if the water content of a soil specimen is kept constant, the suction will be constant and independent of the void ratio (deformation) at high suctions. Therefore, a simple testing method for measuring the stress-strain relations of unsaturated triaxial specimens at high suctions is proposed by combining the vapor equilibrium technique (VET) with saturated salt solutions and the triaxial shear tests at constant water contents. First, a known initial high suction is imposed on the specimen by using the VET with a saturated salt solution. Then, the specimen is triaxially sheared under a constant water content, thereby resulting in a constant high suction during triaxial shearing. The proposed testing method can substantially shorten the testing period for one triaxial test. Finally, the results of triaxial shear tests on silt, silty clay, and expansive soil at high suctions obtained by the proposed testing method are presented.
英文关键词	unsaturated soils triaxial test high suction soil-water retention behavior mechanical behavior
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000618236300019
WOS关键词	WATER-RETENTION BEHAVIOR ; CONSTITUTIVE MODEL ; STRENGTH ; BENTONITE ; SILT ; SAND
WOS类目	Engineering, Geological ; Geosciences, Multidisciplinary
WOS研究方向	Engineering ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367943
作者单位	[Chen, Bo; Sun, De'an] Quzhou Univ, Coll Civil Engn & Architecture, 78 Jiuhuabei Rd, Quzhou 324000, Peoples R China; [Gao, You] Ningbo Univ, Sch Civil & Environm Engn, 818 Fenghua Rd, Ningbo 315211, Peoples R China; [Li, Jie] RMIT Univ, Sch Civil Environm & Chem Engn, 124 La Trobe St, Melbourne, Vic 3001, Australia
推荐引用方式 GB/T 7714	Chen, Bo,Gao, You,Sun, De'an,et al. Simple Testing Method for Measuring the Triaxial Stress-Strain Relations of Unsaturated Soils at High Suctions[J],2021,44(2):535-546.
APA	Chen, Bo,Gao, You,Sun, De'an,&Li, Jie.(2021).Simple Testing Method for Measuring the Triaxial Stress-Strain Relations of Unsaturated Soils at High Suctions.GEOTECHNICAL TESTING JOURNAL,44(2),535-546.
MLA	Chen, Bo,et al."Simple Testing Method for Measuring the Triaxial Stress-Strain Relations of Unsaturated Soils at High Suctions".GEOTECHNICAL TESTING JOURNAL 44.2(2021):535-546.