路基断面填挖区域快速分割及其面积计算探讨

在路基工程中,计算填挖方量的传统方法误差大效率低,该文针对其主要影响因素提出了一种按断面上设计线和地面线的横坐标是否单调进行分类的计算方法。文章首先给出了能够反应填挖属性的一个更简形式的凹凸多边形面积计算公式,然后提出了在横标单调条件下的求交追赶算法,最后介绍了非单调条件下的填挖区域分割与面积计算方法。该方法实现了填挖方量的精确计算,较好地满足了工程概算要求,同时有效提高了设计效率。

REASERCH ON RAPID SEGMENTATION AND AREA CALCULATION GBOUT EXCAVATION-FILL PEGIONS OF SUBGRADE CROSS-SECTIONS

In railway subgrade engineering,traditional methods for calculating the amount of excavation and fill often have big errors and low efficiency.Aiming at the main factors influencing the calculation results,this paper presents an algorithm for calculating the excavation and fill volume according to the classification by the abscissa monotonicity of points sequence on design lines and the ground lines.The paper first presents a formula on calculating the area of concave and convex polygons,which has a simpler...