抛物线竖曲线的测设

为了施工方便和保证工程质量,本文根据设计者所设计的抛物线路面,列出一个二元一次方程y=f(X)。其中,自变量X为抛物线路面上任一点至抛物线路面始点的水平距离,因变量y为该点上的高程,故此,该方程为实地施工、验收提供了极大的方便。此方法十分精确。特别对于当今车辆对公路的要求,是非常有益的。此外,此方法对科学研究提供了可靠的数据。

Pre-Measurement of Vertical Curve of Parabola

For the convenince of constrution and the good quality of the project, this arti-cle presents a duality linear equation y = f (x)according to the parabola surface designed by the designer in which the independent variable x is the horizontal distance from a certain point to the starting point on the parabola surface and the variable y is the high distance. Therefore, this equation is very convenient for the on-the-spot construction. This method is very accurate and important, and it well meets the vehicles'demands for roads at present. Moreover, it provides reliable grounds for scentific research.