摘要
目前,我国高速公路总里程已达16万km,随着高速公路的发展、车流量的增多、汽车保有量的快速增长,近年国内高速公路的运营情况,出现相应的问题。为满足中央分隔带护栏快速开启的功能,现有护栏多重视其活动性,但护栏防撞性能相对较差,一旦失控车辆碰撞中央分隔带开口护栏,容易穿越护栏至对向车道造成2次事故或者多次事故,存在较大安全隐患。按照JTG D81—2017《公路交通安全设施设计规范》规定,高速公路中央分隔带开口护栏设计等级不得低于3(Am)级,通过小型客车、中型客车和中型货车3种车型对开口护栏中部和端部实车足尺碰撞试验,提出1款新型装配式开口护栏结构形式,对增强高速公路安全服务运营水平具有重大意义。
At present,the total mileage of expressway in China has reached 160000 km.With the development of expressway,the increase of traffic flow and the rapid growth of car ownership,there are corresponding problems according to the operation of domestic expressway in recent years.In order to meet the function of fast opening of the central divider guardrail,the existing guardrail pays more attention to its activity,but the anti-collision performance of the guardrail is relatively poor.Once the out-ofcontrol vehicle collides with the open guardrail of the central divider,it is easy to cross the guardrail to cause secondary accidents or multiple accidents to the driveway,resulting in greater safety risks.According to the"Code for Design of Highway Traffic Safety Facilities"(JTG D81-2017),the design grade of open guardrail in the central divider of expressway shall not be lower than Grade 3(Am).Through the full-scale collision test of minibus,medium bus and medium truck on the middle and end of open guardrail,a new type of prefabricated open guardrail structure is put forward,which is of great significance to enhance the operation level of expressway safety service.
出处
《科技创新与应用》
2023年第36期51-54,共4页
Technology Innovation and Application
关键词
装配式
开口护栏
结构设计
安全性能评价
高速公路
fabricated
open guardrail
structural design
safety performance evaluation
highway
