当今高速铁路、高速公路设计日益平顺,互通式立交设计日趋美观,线形复杂度逐步增强,传统手段已不适应当今线路测设的精度和建设周期的要求,为满足GPS坐标法放样需要,本文讨论了“完整非对称型”和“非完整非对称型”线路测设原理,给出了基于直线、圆曲线、缓和曲线三种基本线元的中桩坐标计算模型。编制的线路测设程序,适应于任意复杂线形的中、边桩坐标计算。 Today’s high-speed railways and expressways are becoming more and more smooth in design. The designs of interoperable interchanges are becoming more and more beautiful and the linear complexity is gradually increasing. The traditional methods are not suitable for the accuracy and construction period of current circuit layouts. This paper presents the calculation model of the coordinate of the pile based on the three basic elements of straight line, circular curve and easing curve, based on the principle of “complete asymmetry ” and “non-complete asymmetry ”. Prepared line measurement procedures, to adapt to any complex linear coordinates of the side of the pile.