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在原有公路上检验弯道半径是比较麻烦的,我们为了解决这个问题,把求弯道半径的方法用简单的口诀来表述之,既简单又准确,容易掌握运用。口诀:半弦自乘矢除之加矢除二等于半径。证明: ABC——弯道曲线长度;AC——弦线长度; OC=OB——曲线半径R; BE——圆的直径即2R;BD——矢的长度。
It is troublesome to test the curve radius on the original highway. To solve this problem, we use simple formulas to describe the radius of the curve. It is easy and accurate to grasp and use. Formulas: addition of half-sine multiply-add vector addition to the second is equal to the radius. Proof: ABC - Curve length of curve; AC - String length; OC = OB - Curve radius R; BE - Circle diameter 2R;