A strength criterion for frozen sodium sulfate saline soil

doi:10.1139/cgj-2015-0569

	A strength criterion for frozen sodium sulfate saline soil
	Liao, MK; Lai, YM; Wang, C; Lai, YM (reprint author), Chinese Acad Sci, Cold & Arid Reg Environm & Engn Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China.; Lai, YM (reprint author), Lanzhou Jiaotong Univ, Sch Civil Engn, Lanzhou 730070, Gansu, Peoples R China.
刊名	CANADIAN GEOTECHNICAL JOURNAL
	2016-07
卷号	53 期号:7 页码:1176-1185
关键词	sodium sulfate frozen saline soil strength criterion freezing temperature deviatoric plane
ISSN号	0008-3674
DOI	10.1139/cgj-2015-0569
文献子类	Article
英文摘要	Salt content has been proven to be an important influencing factor on the mechanical properties of frozen saline soils, whose strength criterion is different from that of unfrozen saline soils or frozen soils without salts. In this paper, a series of conventional triaxial tests are carried out for frozen saline soils with sodium sulfate at a temperature of -6 degrees C. A strength criterion of the frozen saline soils, including the influence of salt content, is established by using the generalized nonlinear strength theory. Based on conventional triaxial test results, a modified hydrostatic pressure expression is proposed according to the critical strength function of the modified Cam clay model in the meridian plane. The influence of salt content on the shear strength of the frozen saline soils is investigated according to their freezing temperature curves as well as the formation of salt and ice crystals. The relationship between salt content and friction angle is analyzed. The proposed strength criterion of frozen saline soil is proved to be reliable by extrusion elongation triaxial tests. This criterion can reasonably reflect the major nonlinear strength characteristics of frozen saline soils, including the influences of change in salt content, pressure melting, and ice crushing.
学科主题	Engineering ; Geology
出版地	OTTAWA
资助项目	国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划（973计划）
项目编号	National Natural Science Foundation of China [41230630] ; National Key Basic Research Program of China (973 Program) [2012CB026102] ; Western Project Program of the Chinese Academy of Sciences [KZCX2-XB3-19] ; foundation of State Key Laboratory of Frozen Soil Engineering [SKLFSE-ZY-03]
语种	英语
WOS记录号	WOS:000379174100010
资助机构	NSFC ; MOST
内容类型	期刊论文
源URL	[http://ir.lzu.edu.cn/handle/262010/182543]
专题	土木工程与力学学院_期刊论文
通讯作者	Lai, YM (reprint author), Chinese Acad Sci, Cold & Arid Reg Environm & Engn Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China.; Lai, YM (reprint author), Lanzhou Jiaotong Univ, Sch Civil Engn, Lanzhou 730070, Gansu, Peoples R China.
推荐引用方式 GB/T 7714	Liao, MK,Lai, YM,Wang, C,et al. A strength criterion for frozen sodium sulfate saline soil[J]. CANADIAN GEOTECHNICAL JOURNAL,2016,53(7):1176-1185.
APA	Liao, MK,Lai, YM,Wang, C,Lai, YM ,&Lai, YM .(2016).A strength criterion for frozen sodium sulfate saline soil.CANADIAN GEOTECHNICAL JOURNAL,53(7),1176-1185.
MLA	Liao, MK,et al."A strength criterion for frozen sodium sulfate saline soil".CANADIAN GEOTECHNICAL JOURNAL 53.7(2016):1176-1185.