LIU Mengcheng, GAO Yufeng, LIU Hanlong. Study on shear dilatancy behaviors of rockfills in large-scale triaxial tests[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(2): 205-211.
Citation:
LIU Mengcheng, GAO Yufeng, LIU Hanlong. Study on shear dilatancy behaviors of rockfills in large-scale triaxial tests[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(2): 205-211.
LIU Mengcheng, GAO Yufeng, LIU Hanlong. Study on shear dilatancy behaviors of rockfills in large-scale triaxial tests[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(2): 205-211.
Citation:
LIU Mengcheng, GAO Yufeng, LIU Hanlong. Study on shear dilatancy behaviors of rockfills in large-scale triaxial tests[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(2): 205-211.
1.Research Institute of Geotechnical Engineering of Hohai University Nanjing 210098 China 2.College of Civil Engineering and Architecture Zhejiang University of Technology Hangzhou 310014 China
On the basis of the results of large-scale triaxial tests on typical rockfills for the construction of dams,their shear behaviors under different void ratios or confining pressures including the relationship of(σ1/σ3)-εa and εv-εa,and relationship of dilatancy ratioζ and plastic shear strain εsp were analyzed.It was shown that ① For the rockfills with determined particle grading,the conversion between shear dilatancy and shrinkage of the samples depended upon a critical initial void ratio(e0)crit and critical consolidation pressure(σc)crit;② The shear dilatancy ratioζf at the failure of the samples could be a criterion by which whether shear dilantancy appeared or not could be judged.By means of the nonlinear fitting of the results of triaxial tests,the relationship of(σ1/σ3)-ε a and the relationship of εvp-εsp were described by a uniform formulation,and then the equation of stress-dilatancy and the formulation of dilatancy ratioζf at the failure,which depended upon the initial state of the samples,were proposed respectively.So a criterion was established on the formulation of shear dilatancy ratio ζf which depended upon the initial void ratio e0 and confining pressure σc of the samples.