Design method of highway ramp connection based on polar axis calculation method

Abstract

The invention discloses a polar axis calculation method-based highway ramp connection line designing method, which comprises the following steps: judging an initial horizontal alignment of a main line and a ramp connection, and judging the deflecting direction of the horizontal alignment and line element combination conditions of the horizontal alignment under different deflecting directions; setting each horizontal curve element; setting a boundary condition; sequentially calculating terminal point coordinates of a straight line, a first transition curve, a circular curve and a second transition curve according to a practical highway ramp starting point; verifying whether the distances between starting and terminal points of ramp terminal point line elements are consistent with the determined boundary condition or not; if no, resetting horizontal curve element parameters, and performing recalculation; if yes, performing detailed calculation on an aligned ramp line, outputting planar line data, and outputting a related diagram as required. According to the method, highway separation line designing, interchange ramp connection line designing, branch highway connection designing and the like can be rapidly implemented.

Description

technical field [0001] The invention belongs to the field of transportation and relates to a method for designing highway ramp connections based on a polar axis calculation method. Background technique [0002] At present, the planar alignment design of highways, especially the highway framing route, interchange ramp connection design, and feeder road access design, due to various combinations of planar alignments, many parameters of flat curves, strict boundary conditions, low efficiency of calculation methods, and poor calculation process Complicated and other factors have always troubled engineers and technicians, and unreasonable plane linear design not only greatly affects the appearance of the road, but may even seriously affect driving safety and induce traffic accidents. [0003] A reasonable plane alignment design not only meets the requirements of current standards and specifications, meets the constraints of relevant boundary conditions, and conforms to the relati...

AI Technical Summary

Problems solved by technology

[0004] In the existing method for surveying and designing the basic alignment of the highway plane, the surveying and setting of the circular curve of the highway first determines the center coordinates of a point on the circular curve of the highway in the center coordinate system, and then calculates the difference between the geodetic coordinates and the center coordinates of the point, and the The coordinates of the circular curve are converted into geodetic coordinates, and then the geodetic coordinates of the center point are calculated and determined, and then the coordinates of the point actually required by the project are calculated according to the difference between the point and the geodetic coordinates of the center point. This method has low calculation efficiency and complicated calculation process. Engineering and technical personnel spend a lot of time on tedious calculations, which reduces the optimization design of plane alignment and affects the creativity of engineering and technical personnel

Images