基于安全评价的山区高速公路越岭线纵坡设计方法研究  

Longitudinal Slope Design of Mountainous Expressways Based on Safety Evaluation

作　　者：许甜 邱磊[1] 刘建蓓 高晋生[1] 邓志刚 XU Tian;QIU Lei;LIU Jian-pei;GAO Jin-sheng;Deng Zhi-gang(CCCC First Highway Consultants Co. Ltd.,Xi'an 710075, China;Guangdong Road and Bridge Construction Development Co. Ltd.)

机构地区：[1]中交第一公路勘察设计研究院有限公司,西安市710075 [2]广东省路桥建设发展有限公司

出　　处：《公路》2019年第3期10-15,共6页Highway

基　　金：国家重点研发计划;项目编号2017YFC0803900;广东省交通运输厅2017年度重大科技专项;斯项目编号(科技-2017-01-002-007)

摘　　要：山区高速公路由于地形及其他条件限制,越岭线纵坡设计时常需采用长大上坡或长陡下坡,易存在安全隐患。文中提出了通过安全评价辅助山区高速公路纵坡设计的方法,基于运行速度分布特征及其协调性、一致性的分析,对初步设计方案的大型车连续长上坡通行能力及连续陡下坡车辆制动器上升温度进行安全性评价,综合考虑技术经济因素,提出纵坡优化设计方案,并通过工程实例证明了该方法的适用性及安全评价对设计的指导意义。Because of the constraints due to topography,long-steep longitudinal slope is very common in design of mountainous expressways,which is not favorable for drive safely.In this paper,a longitudinal slope design method assisted by safety assessment is put forward,which is based on the analysis of the driving speed distribution feature and its coordination and consistency.According to the result,the traffic capacity of large vehicle at continuous long uphill segment and the brake drum temperature rising at continuous long downhill segment are evaluated in terms of safety.Comprehensively consider the technical and economic factors,an optimization design scheme for longitudinal slope is proposed.The applicability of the method and the significance of safety evaluation to design are verified through a project example.

关 键 词：山区高速公路 长大纵坡 安全评价 优化设计方法 

分 类 号：U412.33[交通运输工程—道路与铁道工程]