公路月刊1958年5月号介绍了“利用外距求曲线上加桩横断面方向”一文,计算手续比较繁杂。现提出改进办法如下:(1)在半径为 P 的的圆线上有两点 A 和 B(图1),B 点的切线 BC 与 A 点的法向 Highway Monthly May 1958 introduced the “use of the outer distance of the curve to add pile cross-section direction,” a text, the calculation procedures more complicated. Now proposed improvements are as follows: (1) in the radius of the circle P there are two points A and B (Figure 1), the tangent point BC point A and the normal