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为适应高等级公路发展而研究的线形设计方法,以不完整回旋线与圆弧线组成的曲线作为线形设计的基本单元,它吸取了国外曲线形设计方法的精髓,保留了我国以直线为主的习用设计方法的表达方式,能无限制地设计任何曲线组合线形。若用于立体交叉线形设计,能显露出极大的灵活性。为配合本设计方法中选定缓和曲线参数的需要,本文除介绍了采用回旋曲线板的方法以外,还根据国内缺少回旋曲线板的现状,研究了颇为方便的作图法,借助袖珍式计算机,能相当准确地得到符合设计需要的参数值。这个作图法同样可用于以曲线为主的设计方法中。作者根据该设计方法的原理编制了计算机程序,能迅速进行各种曲线的路线特征点与中心桩座标计算。文中还列举了简单明了的算例。
In order to adapt to the linear design method of high-grade highway development, the curves composed of incomplete cyclotrons and circular arcs are taken as the basic unit of linear design, which draws the essence of the overseas curve-shaped design method and retains our main line The expression of the conventional design method, can be unlimited to design any curve combination of linear. If used for three-dimensional cross-linear design, can reveal a great deal of flexibility. In order to meet the needs of the design method selected curve parameters, in addition to the introduction of the method using the curl curve plate, but also according to the current status of the lack of the curl curve plate, the study quite convenient mapping method, with pocket computer , Can be quite accurate to meet the needs of the design parameters. The same drawing method can also be used in the design of the curve-based approach. According to the principle of this design method, the author has compiled a computer program that can quickly calculate the route feature points and center pile coordinates of various curves. The article also lists simple examples.