Mechanism of progressive failure of a slope with a steep joint under the action of freezing and thawing:model test

作     者：LI Cong ZHANG Rong-tang ZHU Jie-bing LU Bo SHEN Xiao-ke WANG Xiao-wei LIU Jie-sheng WU Liang-liang ZHANG Xin-zhou LI Cong;ZHANG Rong-tang;ZHU Jie-bing;LU Bo;SHEN Xiao-ke;WANG Xiao-wei;LIU Jie-sheng;WU Liang-Iiang;ZHANG Xin-zhou

作者机构：School of Civil Engineering and ArchitectureWuhan Polytechnic UniversityWuhan 430023China Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water ResourcesChangjiang River Scientific Research InstituteWuhan 430010China Key Laboratory of Ministry of Education for Geomechanics and Embankment EngineeringHohai UniversityNanjing 210098China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2022年第19卷第10期

页      面：2999-3012页

核心收录：

学科分类：08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(Project No.52179110,41877280 and 51309025) the Fundamental Research Funds for Central Public Welfare Research Institutes(CKSF 2019180/YT) the Research Funding of Wuhan Polytechnic University(NO.2021RZ028) 

主　　题：Rock slope Fractured rock mass Freeze-thaw cycle Model experiment Stability degradation mechanism Failure mode 

摘      要：The stability of slope rock masses is influenced by freeze-thaw cycles in cold region,and the mechanism of stability deterioration is not *** order to understand the damage and progressive failure characteristics of rock masses under the action of freezing and thawing,a model test was conducted on slope with steep joint in this *** temperature,frost heaving pressure and deformation of slope rock mass were monitored in real-time during the test and the progressive failure mode was *** experimental results show that the temperature variations of cracking and the rock mass of a slope are *** are obvious latent heat stages in the temperature-change plot in the crack,but not in the slope rock *** frost heaving effect in the fracture is closely related to the constraint conditions,which change with the deformation of the *** frost heaving pressure fluctuates periodically during freezing and continues to decrease during *** surface deformation of the rock mass increases during freezing,and the deformation is restored when it ***-thaw cycling results in residual deformation of the rock mass which cannot be fully *** shows that the rock mass at the free side of the steep-dip joint rotates slightly under the frost heaving effect,causing fracture *** fracture propagation pattern is a circular arc at the beginning,then extends to the possible sliding direction of the rock *** heaving force and fracture water pressure are the key factors for the failure of the slope,which can cause the crack to penetrate the rock mass,and a landslide ensues when the overall anti-sliding resistance of the rock mass is overcome.