城市道路平曲线设计指标探究

Study on Design Indexes of Urban Road Horizontal Curve

摘要:

平曲线设计是城市道路工程设计中的重要环节，《城市道路路线设计规范》（CJJ 193—2012）对此提出了详细的要求，由于不同设计条文所适用的使用条件有所区别，使部分设计人员在实际工作中对某些条文的解读产生了歧义。通过分析平曲线设计相关条文的基本原理，以对称基本型曲线为例，提出了不同条文适用的边界条件，并针对平曲线转角α≤6°、6°＜α＜12°及α≥12°三种情况提出了相应的平曲线设计方法。

Abstract:

The horizontal curve design is an important link in the engineering design of urban roads. The detailed requirements are proposed in Urban Road Line Design Specification (CJJ 193-2012). There is the difference among the using conditions applicable for the different design clauses, which will make the partial designers have the different meanings in the understanding of some clauses during the practical work. By analyzing the basic principle of the related design clauses of horizontal curve, based on the symmetrical basic curve, the boundary conditions applicable to the different clauses are put forward. Aiming at three conditions of the horizontal curve angles α≤6°, 6°＜α＜12° and α≥12°, the relevant design method of horizontal curve is proposed.