Predicting surface settlement of tunnel using grey relational-support vector machine

Based on the fact that surface settlement was a very complex system engineering,the geo-material was complex,fuzzy and nonlinear in geotechnical engineering,a new model based on grey system was presented,grey relational was used to find the key components.The kernel function and penalty factor was determined by simulated annealing.The nonlinear relation between surface settlement and influencing factors was obtained from the key components by SVM model and the model was applied to the practical engineering.GR-SVM enhances the efficiency and the capability of forecasting.The results of experiment show that the model is valid and can be used to analysis tunnel settlement.