基于平曲线参数的服务区出入口匝道长度研究

Study on Ramp Length of Service Area Entrance and Exit Based on Horizontal Curve Parameters

摘要:

以服务区出、入口匝道的基本概念和相关设计指标为出发点，基于匝道平曲线设计的不同类参数，利用《公路项目安全性评价规范》（JTG B05—2015）（以下简称《规范》）中，匝道运行速度预测模型，构建服务区出、入口匝道最小长度计算模型。最后计算得到不同设计速度下高速公路服务区出、入口匝道长度的最小取值。

Abstract:

Starting from the basic concepts and related design indexes of service area exit and entrance ramps, based on the different parameters of ramp plane curve design, the calculation model of minimum length of service area exit and entrance ramps is established by using the ramp running speed prediction model in the Code for Safety Evaluation of Highway Projects (JTG B05-2015). Finally, the minimum value of the length of the exit and entrance ramps in the expressway service area at the different design speeds is calculated and obtained.