The influence of freeze-thaw action on loess collapsibility coefficient considering soil structure

doi:10.16285/j.rsm.2016.2784

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	The influence of freeze-thaw action on loess collapsibility coefficient considering soil structure
	Chou, Ya-Ling 1,2; Jia, Shu-Sheng 1,2; Zhang, Qing-Hai 1,2; Cao, Wei 3; Sehng, Yu 3
刊名	Yantu Lixue/Rock and Soil Mechanics
	2018-08-10
卷号	39 期号:8 页码:2715-2722 and 2731
关键词	Freezing Soil cement Soil mechanics Soils Thawing Collapsibility coefficient Freeze thaw actions Initial structures Linear correlation Logarithmic relationship Optimum water content Structural characteristics Undisturbed loess
ISSN号	10007598
DOI	10.16285/j.rsm.2016.2784
英文摘要	Structural characteristic is a basic property of loess, and there is a connection between loess collapsibility and its structure. This paper aims at studying how freeze-thaw action affects loess collapsibility with different structural characteristics. A series of collapsibility experiments was performed on artificially structured loess, undisturbed loess and remolded loess, with the use of cement as connection medium among soil particles to prepare artificially structured loess samples. Experimental results show that the collapsibility coefficient of artificially structured loess is less than that of the undisturbed loess and remolded loess before and after freezing-thawing process. The collapsibility coefficient decreases with the increase of cement content. After freezing-thawing, the collapsibility coefficients of most loess samples increase. Especially, for remolded loess and artificially structured loess with low cement content, the increase of collapsibility coefficient is more evident when the water content is close to the optimum water content. Moreover, the increase of collapsibility coefficient is also closely related to the initial structure, water content, dry density and vertical load. Regarding undisturbed loess and remolded loess, a significant negative linear correlation is found between the collapsibility coefficient and unit weight under standard load, 200 kPa. However, for artificially structured loess, it is not the case. Furthermore, for remolded loess and artificially structured loess with 5% cement content, there is a good logarithmic relationship between the collapsibility coefficient and number of freeze-thaw circle under a load of 50 kPa. Also, further research is needed to study whether the original loess can be replaced by artificially structured loess mixed with cement to reflect the collapsibility of structural loess. © 2018, Science Press. All right reserved.
WOS研究方向	Engineering
语种	中文
出版者	Academia Sinica
WOS记录号	WOS:000444614100001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114538]
专题	土木工程学院
作者单位	1.Western Engineering Research Center for Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China; 2.Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China; 3.State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou; Gansu; 730000, China
推荐引用方式 GB/T 7714	Chou, Ya-Ling,Jia, Shu-Sheng,Zhang, Qing-Hai,et al. The influence of freeze-thaw action on loess collapsibility coefficient considering soil structure[J]. Yantu Lixue/Rock and Soil Mechanics,2018,39(8):2715-2722 and 2731.
APA	Chou, Ya-Ling,Jia, Shu-Sheng,Zhang, Qing-Hai,Cao, Wei,&Sehng, Yu.(2018).The influence of freeze-thaw action on loess collapsibility coefficient considering soil structure.Yantu Lixue/Rock and Soil Mechanics,39(8),2715-2722 and 2731.
MLA	Chou, Ya-Ling,et al."The influence of freeze-thaw action on loess collapsibility coefficient considering soil structure".Yantu Lixue/Rock and Soil Mechanics 39.8(2018):2715-2722 and 2731.