Mechanical model of chlorine salinized soil-steel block interface based on freezing and thawing

doi:10.16285/j.rsm.2018.1737

IR > 土木工程学院

	Mechanical model of chlorine salinized soil-steel block interface based on freezing and thawing
	Chou Ya-ling1,2 ; Huang Shou-yang 1,2; Sun Li-yuan 1,2; Wang Li-jie1,2 ; Yue Guo-dong 1,2; Cao Wei 3; Sheng Yu 3
	2019-08
发表期刊	Yantu Lixue/Rock and Soil Mechanics
ISSN	10007598
卷号	40 页码:41-52
摘要	Freezing and thawing process, as a weathering process, is very common in the Northwest China. It repeatedly changes the microstructure and physical properties of the soil, and strongly affects the interaction between soil and structure. In view of the influence of freezing and thawing on the mechanical properties of salinized soil-structure contact surface, the shear tests under unconsolidated and undrained conditions were applied, considering the effects of freezing and thawing cycles, salt content, matrix suction and other factors on the mechanical properties of unsaturated chloride salinized soil-steel interfaces. The results showed that when the salt was not contained in the soil, the mechanical parameters (e.g. cohesion and internal friction angle) of the interface increased at first and then they decreased with the increase in the number of freezing-thawing cycles. When the salt was contained in the soil, the cohesion of the interface between the salinized soil and steel decreased, but the internal friction angle slightly increased with the increase in the number of freezing-thawing cycles. Before and after freezing and thawing, the mechanical parameters of the interface decreased at first and then increased with the increase in salt content, including threshold values of salt contents. Before the freezing-thawing process, the mechanical parameters of the interface have a salt threshold value of 8%. When the number of the freezing-thawing cycles increases, the threshold changes. The suction force of the matrix at the interface generally decreased with the increase in cycles of freezing-thawing process and it eventually stabilized. It firstly decreased and then increased with the increase in the salt content. The salt threshold of matrix suction is approximately 10%. The shear stress-shear displacement of the interface presented two stages including the linear elastic deformation and strengthening stages. When the vertical load is small, the shear stress-displacement curves show weak hardening characteristics, and no obvious strain-softening phenomenon occurs.Therefore the applicability of the shear stress-shear displacement modes at the interface were evaluated and it is found that the Gongpaz model can be well matched with the experimental results. Thus the mechanical model of chlorine salinized soil-steel block interface was established and its reliability was also verified by the experimental data. © 2019, Science Press. All right reserved.
关键词	Chlorine Chlorine compounds Freezing Internal friction Matrix algebra Mechanical properties Shear flow Shear stress Soils Thawing Weathering Freeze-thaw cycles Freezing and thawing cycle Freezing thawing cycles Internal friction angle Mechanical model Mechanical parameters Shear stress displacement Steel interfaces
DOI	10.16285/j.rsm.2018.1737
收录类别	EI ; ESCI
语种	中文
WOS研究方向	Engineering
WOS类目	Engineering, Geological
WOS记录号	WOS:000512656400005
出版者	Academia Sinica
EI入藏号	20193907483257
EI主题词	Soil testing
EI分类号	483.1 Soils and Soil Mechanics - 631.1 Fluid Flow, General - 804 Chemical Products Generally - 921.1 Algebra - 951 Materials Science
来源库	Compendex
分类代码	483.1 Soils and Soil Mechanics - 631.1 Fluid Flow, General - 804 Chemical Products Generally - 921.1 Algebra - 951 Materials Science
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/114265
专题	土木工程学院法学院
通讯作者	Chou Ya-ling
作者单位	1.Lanzhou Univ Technol, Key Lab Disaster Prevent & Mitigat Civil Engn Gan, Lanzhou 730050, Gansu, Peoples R China; 2.Lanzhou Univ Technol, Northwest Ctr Disaster Mitigat Civil Engn, Minist Educ, Lanzhou 730050, Gansu, Peoples R China; 3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, 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	Chou Ya-ling,Huang Shou-yang,Sun Li-yuan,et al. Mechanical model of chlorine salinized soil-steel block interface based on freezing and thawing[J]. Yantu Lixue/Rock and Soil Mechanics,2019,40:41-52.
APA	Chou Ya-ling.,Huang Shou-yang.,Sun Li-yuan.,Wang Li-jie.,Yue Guo-dong.,...&Sheng Yu.(2019).Mechanical model of chlorine salinized soil-steel block interface based on freezing and thawing.Yantu Lixue/Rock and Soil Mechanics,40,41-52.
MLA	Chou Ya-ling,et al."Mechanical model of chlorine salinized soil-steel block interface based on freezing and thawing".Yantu Lixue/Rock and Soil Mechanics 40(2019):41-52.