With the rapid development of economic construction

the rebound deformation analyses are needed in many engineering projects.Through large numbers of consolidation-rebound tests

rebound deformation characteristics of muddy silty clay at Hexi district in Nanjing city under unloading have been studied.It indicates that the elastic deformation of muddy silty clay is much smaller than its plastic deformation and the compressibility of muddy silty clay is reduced significantly when it is compressed again after unloading.By analyzing the relationships of resilience ratio

resilience strain and resilience modulus to unloading ratio

the critical ratio and the ultimate ratio that can be used to estimate the depth of unloading influence are confirmed.The rebound deformation under unloading increases with the residence time before decrease.The test results show that the behaviors of deformation and deformation modulus under unloading conditions are much different from those under loading conditions.