缓和曲线横断面方向的测设

Setting-out Survey about Cross Section of Transition Curve

文中以直缓点为坐标原点,以线路交点方向为x轴,以半径方向为y轴,建立了一个直角坐标系,推导出了求曲线上任一点切线方向的数学模型。由切线方向即可较容易地导出该点处横断面方向。同时也介绍了在缓和曲线和圆曲线部分,测设横断面方向的方法。

An orthogonal coordinate system is built in this paper regarding straight-transition point as origin, regarding point of intersection direction as X axis, regarding radius direction as Y axis, and mathematic model is deduced by which arbitrary point tangent direction of curve can be computed. The cross section of the point can be easily acquired according to tangent direction. At the same time, the method of setting out cross section is also introduced for transition curve and circular curve.