Triaxial test on glass beads simulating coarse-grained soil

作     者：WenDong Xu XueFeng Li WenWei Yang HongJin Jia WenDong Xu;XueFeng Li;WenWei Yang;HongJin Jia

作者机构：School of Civil and Hydraulic EngineeringNingxia UniversityYinchuanNingxia 750021China Solid Mechanics InstituteNingxia UniversityYinchuanNingxia 750021China Ningxia Center for Research on Earthquake Protection and Disaster Mitigation in Civil EngineeringYinchuanNingxia 750021China School of Physics and Electronic-Electrical EngineeringNingxia UniversityYinchuanNingxia 750021China 

出 版 物：《Research in Cold and Arid Regions》 (寒旱区科学（英文版）)

年 卷 期：2022年第14卷第4期

页      面：274-280页

核心收录：

学科分类：081401[工学-岩土工程] 08[工学] 0814[工学-土木工程] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(No.1216020092) the Projects for Leading Talents of Science and Technology Innovation of Ningxia(No.KJT2019001) the innovation team for multiscale mechanics and its engineering applications of Ningxia Hui Autonomous Region,and these supports are gratefully acknowledged 

主　　题：Triaxial test Glass beads Strength Critical state Stick-slip 

摘      要：It is feasible to study the mechanical characteristics of coarse-grained soil by simulated granular materials such as glass *** this paper,3 mm diameter glass beads are used to conduct drained and undrained triaxial tests under different confining pressures to explore their strength,deformation and critical state ***,the influence of drainage and confining pressure on the stick-slip phenomenon of glass beads is *** experimental findings from triaxial tests show that the stress-strain relationship of glass beads softens when the confining pressure is *** the undrained condition,the initial modulus increases with the increase in the confining *** contrast,it is not significantly affected by the confining pressure in the drained *** is quite evident that the glass beads hardly contract during the shearing process,and their stress path is approximately a segmented straight *** slope of the critical state line under the undrained condition is greater than that under the drained condition,and the friction angle of the glass beads under the undrained and drained conditions is calculated to be 28.1
and 29.5
,*** phenomenon of stick-slip has been depicted for the different test conditions,and the stick-slip amplitude linearly increases with the confining pressure,especially in the undrained *** is also found that the maximum energy released from the phenomenon of stick-slip increases linearly with the confining pressure.