互通式立交单车道匝道宽度取值与单出入口优化设计  

Value of Single Lane Ramp Width and Optimization Design of Single Entrance and Exit for Interchange

作　　者：林宣财[1] 曹骏驹 周兴顺 张江洪[1] 白浩晨[1] LIN Xuan-cai;CAO Jun-ju;ZHOU Xing-shun;ZHANG Jiang-hong;BAI Hao-chen(CCCC First Highway Consultants Co.,Ltd.,Xi'an Shaanxi 710075,China;Jiangsu Traffic Engineering Construction Bureau,Nanjing Jiangsu 210004,China;China Design Group Co.,Ltd.,Nanjing Jiangsu 210014,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,陕西西安710075 [2]江苏省交通工程建设局,江苏南京210001 [3]华设设计集团股份有限公司,江苏南京210014

出　　处：《公路交通科技》2021年第9期123-131,共9页Journal of Highway and Transportation Research and Development

基　　金：中交科技基金项目([2018]05)。

摘　　要：随着国家经济及物流交通的迅猛发展,符合高速公路通行规定的超宽、超长货车越来越多,导致已建互通式立交单车道匝道圆曲线路段因路面加宽不足而出现较多交通事故,但相关规范对匝道养护车辆停靠的需求考虑较少。为了保证匝道养护车辆停靠及养护人员作业安全,有些省单车道匝道宽度取值采用了考虑超车之需的规定值,但由于采用单车道出入口,也造成匝道设计存在交通安全隐患。通过对匝道圆曲线路段路面加宽及横断面组成的研究,提出了上述路段路面加宽满足公路养护需要及货车列车车型通行条件的设计方案,并对已建高速公路互通式立交圆曲线路段单车道匝道加宽不足提出了改进建议,对新建互通式立交单车道匝道横断面组成及宽度值提出了建议。认为互通式立交单车道匝道长度总体较短,可考虑统一采用10.5 m宽度及相应的匝道宽度组成。通过对已按超车之需规定建成的互通式立交交通现状调查及安全性分析,认为采用超车之需规定在双车道匝道变为单车道匝道的过程存在交通安全隐患,且受匝道终点为单车道的限制,通行能力提高有限。建议新建互通式立交尽量不考虑超车之需的设计方案,并对既有互通式立交提出了改善连接单出入口的建议。With the rapid development of national economy and logistics transport, there are more and more ultra-wide and ultra-long trucks that comply with expressway traffic regulations, which has led to more traffic accidents in the round-curve sections of the built-in interchange single-lane ramp due to insufficient road widening. However, relevant regulations give less consideration to the demand for parking on ramp maintenance vehicles. In order to ensure the safety of the parking of ramp maintenance vehicles and the safety of maintenance personnel, some provinces have adopted the specified value of the "need for overtaking" in the value of single-lane ramp width. However, due to the use of single-lane entrances and exits, there are also hidden traffic safety hazards in the ramp design. Based on the study of pavement widening and cross-section composition of circular curve section of ramp, the design scheme for pavement widening of the above road section which can meet the road maintenance needs and the traffic conditions of freight train is proposed, the improvement suggestion for the lack of widening of the single-lane ramp in the circular curve section of the built expressway interchange is put forward, and the new interchange bicycle is proposed, and the suggestion for the cross-section composition and width value of single-lane ramp of new interchange is put forward. It is believed that the length of single-lane ramp of interchange is generally short, and 10.5 m width and corresponding ramp width can be considered. Based on the traffic status investigation and safety analysis of the built interchange according to the requirements of overtaking, it is believed that there are hidden traffic safety hazards in the process of adopting the requirement of overtaking when changing 2-lane ramp into single-lane ramp, and the traffic capacity is limited due to the limitation of the ramp end being single-lane ramp. It is recommended that new interchanges should be built without considering the need for overtaking as much as

关 键 词：交通安全 单车道匝道宽度 公路养护 通行条件 匝道横断面组成 

分 类 号：U412.36[交通运输工程—道路与铁道工程]