Pred icti on M odel of Silt Permanen t D eforma tion under Repeated L oad GAO Q i2ju 1 , GUO Zhong2yin 2 , CONG L in2 (1. ShandongTransportation Institute, Jinan 250031, China; 2. School of Transportati on Engineering, Tongji University, Shanghai 200092. China ) Abstract: W ith universal material test system, under different water content, compactness and deviator stress, repeated load tri 2axial