Overall reconstruction design method of plane line position of existing railway

Abstract

The invention discloses an overall reconstruction design method of a plane line position of an existing railway. The method comprises the steps that the line element types of testing points are identified based on the tangent azimuth change rate of each testing point, and initial clustering of the testing points is conducted; based on the number of the testing points in each line element point group, the initial clustered line element point groups are adjusted; based on the crossing point position of straight lines at two ends of each circular curved segment, the line element point groups arefurther adjusted; iterative computation is conducted, easement curve line element testing points in a linear element point group and a circular curve line element point group are gradually identifiedand adjusted, so that the number of the testing points in the line element point groups stable, final clustering of three kinds of line element testing points is achieved, and fitting of local line positions is conducted; all the local line positions are connected and form an initial overall fitting line position, the fitting line position is optimized, and the final plane reconstruction scheme ofthe existing railway is obtained. The overall reconstruction design method of the plane line position of the existing railway can precisely identify different types of line element testing points, and can optimize the fitting line position from an overall prospective and achieve rapid overall reconstruction of the plane line position of the existing railway.

Description

technical field [0001] The invention relates to a railway design method, in particular to an overall reconfiguration design method of an existing railway plane line position. Background technique [0002] The railway is an important national infrastructure and the main artery of the national economy, and plays an important role in my country's economic and social development. With the development of my country's railways from normal speed to high speed and the substantial improvement of railway line design standards, its maintenance and reconstruction tasks have also increased rapidly. After long-term running of trains and official maintenance and maintenance, the plane alignment of the railway will change to a certain extent. The specific performance is that the straight line part of the line is bent, and the plane alignment parameters such as the deflection angle of the curve part, the length of the transition curve, and the radius of the circular curve are related to the ...

AI Technical Summary

Problems solved by technology

The auxiliary clustering method is inefficient and cannot meet the fast calculation requirements of high density and large data volume

Automatic clustering is mainly a single clustering based on the curvature of the measuring point. In the case of high noise, it is often unable to accurately identify the line type of the measuring point, resulting in an error in the clustering of the line elements. Between straight line element measuring points and circular curve line element measuring points, the existing methods can only realize the clustering of straight line element measuring points and circular curve line element measuring points, and it is difficult to cluster the transition curve line element measuring points

In addition, the existing railway plane alignment reconstruction only considers the optimal fitting of the local alignment, and does not consider the optimal fitting of the entire line from a global perspective

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