平面交叉口竖向设计高程计算的综合法

采用方格网法将交叉口划分为四边形或三角形网格,将所有网格点作为设计计算点,利用圆心法确定各计算点的初始高程计算线,通过等分法、迭代法对初始高程计算线进行调整,并得到计算点的设计高程,根据网格点平面坐标及高程数据绘制设计等高线及三维表面效果图用于设计调整与质量检验。综合法所得竖向设计表面平顺,计算结果便于直接应用于工程的图纸设计与施工,该方法集成了方格网法、圆心法、等分法及等高线法的优点并加以改进,方法更加完善,工程适用性得到提高。

Synthetic Calculation Methods for Elevation of Grade Crossing Vertical Design

The crossing is divided into the nets of quadrangles or triangles by grid method. As calculating points in design with all the net points, the initial elevation calculating lines of every calculating point are fixed by centre method and rgeulated by halving method and iteration, so obtaining the design elevation of calculating points. The design contour and three dimentional surface effect chart, which are used for design regulation and check on the quality, are drawn according to the plane coordinates of net points and the elevation data. The Surface of vertical design, obtained by synthetic calculation methods, is smooth. The calculated results are convenient to be directly applied to drawing design and construction of an engineering. Present methods have pooled assets of grid method, centre method, halving method and contour method, moreover improved them, making them more perfect and heightening their adaptability to a project.