基于参数方程确定线路中边桩放样坐标的方法研究

Coordinate Calculation for Middle and Side Stakes of Highway Based on Parametric Equation Method

该文介绍了在线路放样过程中使用参数方程来确定中边桩坐标的新方法。根据曲线模型,找出线路控制坐标系与局部坐标系坐标之间的参数方程关系,推出了缓和曲线及圆曲线中边桩坐标的参数方程,代入已知量求得参数的值,给出了求解步骤。该方法思路清晰,具有一次计算就可以实现坐标准确确定的优点,便于工程应用。

This paper introduces a new method of coordinate calculation of middle and side stakes based on parametric equations. The relations of parametric equations with the route coordinates and the part coordinates are found out according to the curve model, the parametric equations of middle and side stakes in circular curve and easement curve are derived, thence the value of parameters is obtained, the solution procedure is got. The method is clear and has the advantages of determining accurately the coordinates by calculation only once, so it is suitable for engineering application.