Experimental Study on the Coefficient of Earth Pressure at Rest for Sand

The coefficient of earth pressure at rest K0 is a state soil variable correlated with relative density Dr. As previously conducted tests could not guarantee zero lateral deformation in the sand specimens, significant errors occurred test results. In this paper, centrifugal model method used to study varying densities. specimens densities are prepared by pluviation, and 50 g-ton force applied. Subsequently, relationship Dr different analyzed. results show that for same type sand, value gradually increased Based on meso-evolution characteristics particle recombination, various relationships between K0, displacement deflection angle, friction offset angle particles Furthermore, volume fraction derived, assumption increasing increase verified, effect transfer behavior internal fabric briefly discussed. research significantly improve current theories.