Study on Settlement Prediction of Soft Roadbed in Highway

Based on the soft roadbed section of Xingtai-Linxi highway,a combined weighting model was built on the condition of the minimal absolute values of errors on the base of double-curve model and grey model.The comparative result between the computational analysis and actual measurement showed that the predictive error with combined weighting model was reduced,which overcome the shortcoming of single prediction model.The creation of combined weighting model had some theoretical meaning and practical value to study the settlement prediction.