Experimental study on compaction-induced anisotropic mechanical property of rockfill material

作     者：Xiangtao ZHANG Yizhao GAO Yuan WANG Yu-zhen YU Xun SUN Xiangtao ZHANG;Yizhao GAO;Yuan WANG;Yu-zhen YU;Xun SUN

作者机构：State Key Laboratory of Hydroscience and EngineeringDepartment of Hydraulic EngineeringTsinghua UniversityBeijing 100084China 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2021年第15卷第1期

页      面：109-123页

核心收录：

学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 

基　　金：This work was supported by the National Key R&D Program of China(No.2017YFC0404802) the National Natural Science Foundation of China(Grant Nos.U1965206 and 51979143) 

主　　题：rockfill inclination of specimen preparation anisotropy mechanical property mechanism 

摘      要：The anisotropy of rockfill materials has a significant influence on the performance of engineering ***,relevant research data are very limited,because of the difficulty with preparing specimens with different inclination angles using traditional ***,the anisotropy test of rockfill materials is complex and complicated,especially for triaxial tests,in which the major principal stress plane intersects with the compaction plane at different *** this study,the geometric characteristics of a typical particle fraction consisting of a specific rockfill material were statistically investigated,and the distribution characteristics of particle orientation in specimens prepared via different compaction methods were *** high-density rockfill materials,a set of specimen preparation devices for inclined compaction planes was developed,and a series of conventional triaxial compression tests with different principal stress direction angles were *** results reveal that the principal stress direction angle has a significant effect on the modulus,shear strength,and dilatancy of the compacted rockfill *** of the relationship between the principal stress direction angles,change in the stress state,and change in the corresponding dominant shear plane shows that the angle between the compacted surface and dominant shear plane is closely related to interlocking resistance associated with the particle *** addition,different principal stress direction angles can change the extent of the particle interlocking effect,causing the specimen to exhibit different degrees of anisotropy.