京通快速路交通工程安全设施设计中的若干问题

A Number of Problems in Designing the Road Safety Facility Systems of the Traffic Engineering for Jingeong Expressway

本文对京通快速路交通安全,设施系统设计中有关反光产品的特性进行分析,结合京通快速路设计特点确定了反光产品使用类型的选取原则;论述了反光膜的特性及其组合方式;对波形梁防撞护栏立柱刚度进行计算比较,从而确定了护栏立柱类型的选取原则;对波形梁护栏端头及紧急电话护栏开口带的抛物线线形进行推导,并提供了抛物线线形护栏的设计实例及有关的解析计算。

Inthis paper, we first study the specific properties of some reflectiv products selected in designing the road safety facility systems for jingtong Expressway,the pirnciple for product selection is decided in the light of the specific conditions of jingtong Expressway. The reflective sheeting characteristics and its constitutional form are discussed. By calculating and comparing some kinds of post stiffness of W Guardrail, the principle for guardrail post shape selection is decided. The analytic method for soloving the equations of parabola shape used in the guardrail extremity and the guardrail break for Energency Telephone is obtain, two designing examples of parabola shape and analytic methods are given.