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林区公路的特点是,弯道多,半径小,地形复杂。在弯道曲线通过处,由于地面凸凹不平,为了取得较高的精度,往往要设置弯道加桩。可是弯道桩的横断面线与直线桩横断面线的定向是不同的,兹将弯道桩横断面线定向的精确方法介绍如下: 因圆心角等于偏角,所以,图中OD,OE是∠AOC的分角线,也是∠I的分角线。根据几何学“半径必相等,二等边三角形的两底角相等及等弧对等弦”的定理,即能确定弯道桩任意位置的横断面方向。
Forest Road is characterized by curved corners, small radius, complex terrain. Curve through the corner at the office, due to the uneven surface, in order to achieve higher accuracy, often to set the corner plus pile. However, the cross-sectional line of the curve pile is different from that of the linear pile cross-sectional line. The precise method of orienting the cross-sectional line of the curve pile is as follows: Because the central angle is equal to the declination angle,分 AOC angle line, but also 分 I corner line. According to the geometry “the radius must be equal, the equilateral triangle equilateral and equi-arc equivalent arc” theorem, that is, to determine any position of the bend pile cross-sectional direction.