EXPERIMENT OF HIGH-SPEED RAILWAY SUBGRADE SETTLEMENT PREDICTION ANALYSIS

摘要

Subgrade stability affects the high-speed train safety and passenger comfort directly.With the rapid development of China's high-speed railway,subgrade settlement prediction analysis and deformation control become very important.In this paper,we used the subgrade settlement measured data of Beijing-Shanghai High-Speed Railway as a case study; we analyzed the relationship between the subgrade settlement and time,and applied hyperbolic model,exponential model and Poisson model to predict subgrade post-construction settlement.The results show that cumulative settlement of subgrade measuring point is 6.4 mm from the beginning to l l8th day after roadbed filling construction,and the sedimentation rate becomes steady at 0.001 mm/d.Comparative analysis shows that the hyperbolic model has the best fitting performance among the three curve regression models.