Alignment Fitting Method for Beijing-Taibei Expressway Reconstruction and Extension Project
When fitting the vertical section alignment of the route with the route alignment fitting method of the reconstruction and ex-pansion project of the conventional expressway,the fitting deviation of the route alignment is large and the accuracy is low.Therefore,the least square method and the linear regression concept of one variable are introduced to optimize the fitting method of the conven-tional route alignment,taking Beijing-Taibei Expressway as an example.The curvature arc length discrimination method is used to i-dentify the road alignment of the reconstruction and expansion project according to the relationship between the curvature of the line segment and the arc length.The vehicle LiDAR measurement system is used to scan the original road pavement,subgrade and align-ment,and collect the digital elevation model data of the original road.Calculate the maximum service traffic volume of the lane in the construction area,and fit the vertical section alignment of the reconstruction and expansion project according to the least square method and the linear regression principle.It can be seen from the experimental analysis that through optimization method for route alignment fitting,the alignment fitting deviation is small and the accuracy is high when the step size of the center stake sampling points in each road section gradually increases.
万方数据
维普
