The post construction deformation characteristics of high fill roadbed slopes are complex.How to reasonably predict the settlement displacement during the construction period has become the focus of attention for all parties involved.Based on the monitoring data of slope deformation of a high fill subgrade,the deformation characteristics and laws of the subgrade slope are systematically studied.The fitting analysis is carried out by using logarithmic curve model,exponential curve model,hyperbola model,parabola model and Poisson curve model.The settlement prediction model is verified by numerical simulation calculation.Research shows that:① After the construction of high fill embankment slope,the deformation with nonlinear increasing trend will occur,and the increasing rate will decrease gradually,and the slope will be stable as a whole.②From the analysis of the determination coefficient and the estimation standard error,the fitting degree of the five regression prediction models is relatively good.③For the settlement displacement,logarithmic curve model and parabolic model are better than hyperbolic model and exponential model,and Poisson curve model is worse.④ The logarithmic curve model was compared and analyzed by UDEC numerical simulation software,and its fitting effect was verified.It can provide reference for roadbed engineering of highway and railway.
关键词
高填路基/现场监测/数值模拟/变形特征/预测模型
Key words
high fill subgrade/field monitoring/numerical simulation/deformation characteristics/prediction model
万方数据