互通式立交计算机辅助设计与绘图系统

Computer Aided Design and Graph System of Interchanges

本系统建立了适合计算机特点又给用户提供了最大自由决策的线元设计法,它能迅速有效地由线元构造出各种复杂线形,并可支距出任意条线性、抛物线或圆弧等有确定函数关系的偏置线.本系统把分析计算、图形交互修改和数据管理融成体,实现了方案的比选和优化设计,可以完成各种型式互通立交的初步设计和施工图设计与绘图的主要工作.本文还给出京津塘高速公路南营互通立交和南京油坊桥互通立交的设计实例.

This paper presents the CAD system of interchanges for which the suggested segmentary element design method can be appropriate to computer and also can give the users a decision-making with the greatest freedom. The system can quickly and effectively construct and treat all types of curves of alignment. It can offset any type of segment, such as linear, parabola and arc and etc. with definite mathematical functions. This CAD system really combines analysis, computation, interactive modification of graph and data management as a whole and achieve the realization of choosing and diciding as well as optimizing an engineering project. The preliminary design and the construction drawings for interchanges can be completed by this system and the projects of Nanying Interchange in Beijing-Tianjin-Tanggu freeway and You Fangqiao Interchange in Nanjing are given as examples.