Experimental study on mechanical behavior deterioration of undisturbed loess considering freeze-thaw action

doi:10.28927/SR.2024.005822

IR > 土木工程学院

	Experimental study on mechanical behavior deterioration of undisturbed loess considering freeze-thaw action
	Yang, Shuangshuang; Chou, Yaling; Wang, Lijie; Zhang, Peng
	2024
发表期刊	SOILS AND ROCKS
ISSN	1980-9743
卷号	47 期号:1
摘要	To solve the problem that the mechanical behavior of undisturbed loess in seasonally frozen soil area is affected by freeze-thaw action, triaxial shear tests of undisturbed loess under freeze-thaw condition were carried out. The results show that the mechanical properties of undisturbed loess are greatly affected by factors including freeze-thaw process, water content, natural density and confining pressure. Freeze-thaw action has a certain impact on the failure surface shape and stress-strain curve. Before and after freeze-thaw, the shape of the shear failure surface is complex, including single oblique failure surface, double oblique failure surface, vertical failure surface, X-shaped failure surface, bulging failure, etc. And under the conditions of low water content, low confining pressure and high dry density, the stress-strain curve tends to be softened. Conversely, the curve tends to harden. Freeze-thaw action can make the stress-strain curve transition from softening to hardening. In addition, the freeze-thaw action significantly weakens the failure strength, shear strength, cohesion, initial tangent modulus and failure ratio of undisturbed soil, but does not change the internal friction angle obviously. Also, the heterogeneity of natural soil is also an important factor affecting the mechanical parameters, failure surface shape and stress-strain curve of undisturbed loess.
关键词	Freeze-thaw action Undisturbed loess Triaxial shear test Failure form Stress-strain curve
DOI	10.28927/SR.2024.005822
收录类别	ESCI
语种	英语
资助项目	National Natural Science Foundation of China [51769013, 52168052]; China Energy Construction Group Gansu Electric Power Design Institute Co., LTD.; Science and Technology Project
WOS研究方向	Engineering
WOS类目	Engineering, Geological
WOS记录号	WOS:001167534100012
出版者	BRAZILIAN ASSOC SOIL MECH & GEOTECH ENGN, PORTUGUESE GEOTECH SOC
原始文献类型	Article
EISSN	2675-5475
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/169886
专题	土木工程学院法学院
通讯作者	Chou, Yaling
作者单位	Lanzhou Univ Technol, Key Lab Disaster Prevent & Mitigat Civil Engn Gans, Lanzhou, Gansu, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Yang, Shuangshuang,Chou, Yaling,Wang, Lijie,et al. Experimental study on mechanical behavior deterioration of undisturbed loess considering freeze-thaw action[J]. SOILS AND ROCKS,2024,47(1).
APA	Yang, Shuangshuang,Chou, Yaling,Wang, Lijie,&Zhang, Peng.(2024).Experimental study on mechanical behavior deterioration of undisturbed loess considering freeze-thaw action.SOILS AND ROCKS,47(1).
MLA	Yang, Shuangshuang,et al."Experimental study on mechanical behavior deterioration of undisturbed loess considering freeze-thaw action".SOILS AND ROCKS 47.1(2024).