互通式立交平面线形控制线元法

The Controlled Segmentary Element Design Method of Interchange

通过对互通式立交平面线形设计理论的研究，提出了互通式立交平面线形设计新方法——控制线元法，该方法以“部分回旋线＋圆曲线”为控制线形单元，结合路线起终点的控制信息，能迅速而有效地进行互通式立交平面设计。

Through the study of interchange horizontal alignment design theory, this paper presents a new method-cntrolled segmentary element design method. This method, combined with start and terminal control information, can quickly and effectively work out all types of curves of interchange horizonal alignment, by means of segmentary element which is composed of part of spiral curve and arc.