Abstract:Post-construction settlement is one of the main issues for expressway construction in soft soil areas. Based on the characteristics of a typical settlement-time relationship, a power-polynomial model from Taylor series expression is proposed for prediction and analysis of the post-construction settlement on soft ground. The model parameters are obtained and the in-situ test data analyzed. With the field monitored settlement at a expressway in GuangDong,the power-polynomial model is applied to predict the settlement according to the in-situ data.The results show that the parameters of the power-polynomial model can be determined simply by using the in-situ data, the prediction have high precision, and the post-construction settlement on soft ground can be described.