A method for surveying and setting railway centerline based on reference ellipsoid

Abstract

The invention discloses a method for surveying and setting a railway center line based on a reference ellipsoid, comprising the following steps: S1: determining the starting point information, ending point information and intersection point information of the railway line; S2: calculating the comprehensive elements of the curve by using a geometric analysis method; S3: Calculate the mileage of each main point of the curve according to the comprehensive elements of the curve; S4: compare the mileage of each measuring point with the numerical value of the mileage of each main point of the curve, and determine the line segment to which each measuring point belongs; S5: calculate the ellipsoid coordinates of each measuring point; S6: According to the ellipsoidal coordinates of each measuring point, the center line of the railway is measured and set. By adopting the technical solution provided by the invention, the longitude and latitude of each point on the center line of the railway on the reference ellipsoid can be directly used for measurement and design, so that the measurement and calculation results have no projected deformation or the deformation can be minimized. Moreover, the data calculated on the reference ellipsoid can be used to obtain results on various projection surfaces according to various projection rules, which makes the calculated data reusable and universal.

Description

technical field [0001] The invention belongs to the technical field of railway centerline survey and design, and in particular relates to a method for railway centerline survey and design based on a reference ellipsoid. Background technique [0002] The center line of the railway is also called the center line of the railway line. It is defined as: on the cross-section of the railway subgrade, the intersection point of the vertical line half a gauge away from the outer rail and the horizontal line of the road shoulder along the longitudinal direction of the line. Its spatial position is represented by line plane and longitudinal section. From a plane point of view, in a straight section, it is the center line of the two steel rails or the top surface of the subgrade; in a curved section, the subgrade is widened outside the center line, and the gauge is widened by moving the inner rail inside the center line. Symmetrical about the centerline. Viewed in profile, its elevati...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of railway center line survey and design, and propose a method for railway center line survey and design based on reference ellipsoid

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