摘要
基于各类道路线型曲率呈线性变化的共同特性,给出了线元上任意点坐标方位角的统一计算公式,进而提出了适用于所有道路线型平面测设计算的中桩坐标、边桩坐标的通用公式。在此基础上,讨论线路外一点对应中桩的计算以及直线与线路交点的计算,给出了相应的计算方案。
The setting out of centerline pegs and side pegs of route constitutes most of the routine surveying tasks, and plays a very important role in the route construction. The computation of plane coordinates of centerline and its sideline is the key to the job of setting out with modem surveying instruments. Based on the fact that curvature of any point on a curve line varies proportionally with its curve length for all types of curve elements, it proposers a set of formulae which are versatile for the plane coordinates computation in the setting out of routes, including the azimuth formula, the formulae in numerical form for the coordinates of centerline and side pegs. Also, with the proposed universal formulae, the computations for the corresponding center pegs of a point off the centerline and the intersection problem of a straight line and the centerline are discussed, and then the so- lution schemes are given respectively.
出处
《测绘工程》
CSCD
2006年第2期17-21,共5页
Engineering of Surveying and Mapping
基金
山东省泰山学者建设工程专项经费资助
