Railway center line measuring and setting method based on reference ellipsoidal surface

Abstract

The invention discloses a railway center line measuring and setting method based on a reference ellipsoidal surface. The railway center line measuring and setting method comprises the following steps:S1, determining starting point information, end point information and intersection point information of a railway line; S2, calculating curve comprehensive elements by utilizing a geometric analysismethod; S3, calculating mileage of each main point of the curve according to the comprehensive elements of the curve; S4, comparing the mileage of each measuring point with the numerical value of themileage of each main point of the curve, and determining a line segment to which each measuring point belongs; S5, calculating ellipsoid coordinates of each measuring point; and S6, according to the ellipsoid coordinates of all the measuring points, conducting railway center line measuring and setting. By adopting the technical scheme provided by the invention, the longitude and latitude of each point of the railway midline on the reference ellipsoid can be directly used for measurement and setting, so that the measurement and calculation result has no projection deformation or the deformationis minimized. And results on various projection planes can be obtained by referring to data obtained by calculation on the ellipsoidal surface according to various projection rules, so that the calculation data has reusability and universality.

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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