Investigating the Shear Behavior of Interfaces between Frozen Clay and Cement Blocks

doi:10.1061/JMCEE7.MTENG-16101

IR > 理学院

	Investigating the Shear Behavior of Interfaces between Frozen Clay and Cement Blocks
	He, Pengfei1,2,3 ; Guo, Han 1,2; Dong, Jianhua1,2 ; Mu, Yanhu 3; Liu, Furong 3
	2024-05-01
发表期刊	Journal of Materials in Civil Engineering
ISSN	0899-1561
卷号	36 期号:5
摘要	The interfacial frictional resistance of anchor solids, bolt, and the surrounding soil of soil nails in the flexible support structures of frozen soil slopes is a key parameter for calculating and evaluating its stability. Based on a series of direct shear tests under the condition of a constant normal load boundary, the shear mechanical behavior of the interface between the soil and a cement slurry block under different soil temperatures, water contents, and normal pressures was studied, and the interfacial deformation mechanism was analyzed. The results show that in the thawing state, with the increase of water content, the shear surface moves from the side close to the soil to the side close to the cement slurry block. However, the shear plane is determined in the direct shear test, which makes the effect of the change of the soil's own strength on the interfacial shear strength smaller. In the frozen state, the behavior of the interfacial shear stress-shear displacement behavior at the same water content varies from strain-hardening type to strain-softening type with the temperature decreasing. The normal displacement is affected by temperature, normal pressure, and water content. At the same temperature, the maximum normal displacement gradually decreases with the increase of water content and normal pressure. At the same normal pressure and water content, the maximum normal displacement tends to increase and then decrease as the temperature drops. Still, the maximum normal displacement in the frozen state is more significant than in the thawing state. At the same water content and normal pressure, the interfacial peak shear strength shows a nonlinear increase with the decrease in temperature. At the same normal pressure and temperature, the interfacial peak shear strength delivers a linear increasing law with increasing water content. The peak interfacial cohesion increases with the decreasing temperature and increasing water content, and this phenomenon is more evident at lower temperatures. The interfacial friction angle does not change significantly with the rise in water content at the same temperature, but as temperature decreases, its average value increases significantly. The research results can provide a reference for the design of slope support structures in cold regions. © 2024 American Society of Civil Engineers.
关键词	Friction Frozen soils Shear flow Shear stress Soil cement Strain hardening Temperature Thawing Cement blocks Cement slurry Direct shear test Frozen state Normal displacement Normal pressure Peak shear strength Shears strength Soil nails Support structures
DOI	10.1061/JMCEE7.MTENG-16101
收录类别	EI
语种	英语
出版者	American Society of Civil Engineers (ASCE)
EI入藏号	20241015667712
EI主题词	Shear strength
EI分类号	406.2 Roads and Streets ; 412 Concrete ; 483.1 Soils and Soil Mechanics ; 537.1 Heat Treatment Processes ; 631.1 Fluid Flow, General ; 641.1 Thermodynamics
原始文献类型	Journal article (JA)
EISSN	1943-5533
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/170002
专题	理学院土木工程学院
通讯作者	Dong, Jianhua
作者单位	1.Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou Univ. of Technology, 287 Langongping Rd., Lanzhou; 730000, China; 2.W. Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou Univ. of Technology, 287 Langongping Rd., Lanzhou; 730000, China; 3.State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, 320 Donggangxilu Rd., Lanzhou; 730000, China
第一作者单位	甘肃省土木工程防灾减灾重点实验室
通讯作者单位	甘肃省土木工程防灾减灾重点实验室
第一作者的第一单位	甘肃省土木工程防灾减灾重点实验室
推荐引用方式 GB/T 7714	He, Pengfei,Guo, Han,Dong, Jianhua,et al. Investigating the Shear Behavior of Interfaces between Frozen Clay and Cement Blocks[J]. Journal of Materials in Civil Engineering,2024,36(5).
APA	He, Pengfei,Guo, Han,Dong, Jianhua,Mu, Yanhu,&Liu, Furong.(2024).Investigating the Shear Behavior of Interfaces between Frozen Clay and Cement Blocks.Journal of Materials in Civil Engineering,36(5).
MLA	He, Pengfei,et al."Investigating the Shear Behavior of Interfaces between Frozen Clay and Cement Blocks".Journal of Materials in Civil Engineering 36.5(2024).