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在公路测量中,选线人员常常通过查表计算、或展点绘图以选定平曲线半径,不仅操作较繁,携带的书表工具也较多,今推荐一种“平曲线半径选定图”可供三、四级公路使用,操作简单,能迅速得出答案,精度亦能满足要求。对于计算上较繁的两点虚交、三点虚交和多点虚交曲线的半径选定,本图优点尤为突出,特别是在鸡爪地形布线,一般常需多次调正线位,若采用本图,
In highway surveying, line selection staff often through the look-up table calculation, or point drawing to select the flat curve radius, not only more complex, more tools to carry the book, now recommend a “flat curve of radius of choice ”Available for three or four road use, simple operation, can quickly come to the answer, accuracy can meet the requirements. For the calculation of the more complex two-point virtual intersection, three-point virtual intersection and multi-point virtual intersection radius selection, the figure advantages are particularly prominent, especially in the chicken claw terrain wiring, often need to adjust the line position, If you use this map,