基于横向力系数的高速公路互通段平曲线拼宽论证分析

Demonstration Analysis of Flat Curve Widening of Expressway Interchange Based on Transverse Force Coefficient

文章结合广西某高速公路互通段主线改扩建工程实例,根据互通圆曲线半径控制原则,阐述了高速公路互通段圆曲线超高处理方案,并基于横向力系数对该高速公路互通段平曲线旧路拼宽方案进行了论证。通过维持旧路圆曲线半径、采用4%横坡的方案,弥补了该互通主线圆曲线半径不足的缺陷,满足了设计要求。论证方法及过程可为同类项目提供借鉴。

Based on the principle of interchange circle curvature radius control, and combined with main line reconstruction practices of an expressway interchange segment in Guangxi, this article described the circular curve ultra-high treatment scheme of expressway interchange section,and based on the transverse force coefficient, it demonstrated the old road widening scheme at fiat curve of inter- change section in this expressway.By maintaining the radius of old road curve and using 4% slope program,it made up for the defects of radius shortcomings at circular curve of main line in this interchange,which can meet the design requirements.Demonstration methods and processes can provide reference for similar projects.