华南理工大学学报(自然科学版) ›› 2020, Vol. 48 ›› Issue (4): 104-113.doi: 10.12141/j.issn.1000-565X.190341

• 交通运输工程 • 上一篇    下一篇

高速公路连续长下坡路段大型货车专用缓速车道研究

张驰1,2 胡涛1,3 林宣财4 白浩晨4 吴善根4
  

  1. 1. 长安大学 公路学院,陕西 西安 710064; 2. 道路基础设施数字化教育部工程研究中心,陕西 西安 710000; 3. 陕西省交通基础设施建设与管理数字化工程研究中心,陕西 西安 710000; 4. 中交第一公路勘察设计研究院有限公司,陕西 西安 710075)
  • 收稿日期:2019-06-13 修回日期:2019-10-14 出版日期:2020-04-25 发布日期:2020-04-01
  • 通信作者: 张驰(1981-) ,男,博士,教授,主要从事交通安全与基础设施信息化及数字化相关研究。 E-mail:zhangchi@chd.edu.cn
  • 作者简介:张驰(1981-) ,男,博士,教授,主要从事交通安全与基础设施信息化及数字化相关研究。
  • 基金资助:
    国家重点研发计划项目 ( 2017YFC0803906 ) ; 长安大学中央高校基本科研任务费专项资金资助项目(300102210205)

Research on Exclusive Low-Speed Lane for Large Truck in Highway Continuous Long Downhill Section

ZHANG Chi1,2 HU Tao1,3 LIN Xuancai4 BAI Haochen4 WU Shangen4   

  1. 1. College of Highway,Chang’an University,Xi’an 710064,Shaanxi,China; 2. MOE Engineering Research Center of Digital Road Infrastructure,Xi’an 710000,Shaanxi,China; 3. Transportation Infrastructure Construction and Management Digital Engineering Research Center of Shaanxi Province,Xi’an 710000,Shaanxi,China; 4. CCCC First Highway Consultants Co. ,Ltd. ,Xi’an 710075,Shaanxi,China
  • Received:2019-06-13 Revised:2019-10-14 Online:2020-04-25 Published:2020-04-01
  • Contact: 张驰(1981-) ,男,博士,教授,主要从事交通安全与基础设施信息化及数字化相关研究。 E-mail:zhangchi@chd.edu.cn
  • About author:张驰(1981-) ,男,博士,教授,主要从事交通安全与基础设施信息化及数字化相关研究。
  • Supported by:
    Supported by the National Key Research and Development Plan ( 2017YFC0803906)

摘要: 为降低大型载重货车的下坡风险,提升我国高速公路连续长下坡的行车安全性,研究了连续长下坡路段货车专用缓速车道。分析了大型货车在发动机辅助制动下坡时的行驶特性,基于货车制动毂温度和速度特性,提出长下坡路段应在必要时增设货车专用缓速车道。以六轴铰接列车为设计主导车型,从铰接列车下坡安全性入手研究了缓速车道的架构体系,明确了缓速车道的设置方法,提出了包括渐变段、缓冲区和稳速区等在内的车道架构及其线形指标,分析了缓速车道的合理限速值以及推荐挡位。最后以G5 京昆高速某长大下坡为例,通过多种通行方式下的货车制动毂温升数值模拟,对比验证了缓速车道的安全通行性。结果表明: 相较于自由流速度下坡和分车道限速下坡,设置缓速车道后坡底制动毂温度分别降低了 114 和 79 ℃,降温幅度分别达到 32. 9% 和 25. 3% ,且缓速车道路段内最高温度低于安全临界温度,表明在连续长下坡内增设缓速车道可显著缓解制动毂温升态势,降低货车制动失效概率。

关键词:

Abstract: Exclusive low-speed lane for large trucks was designed to improve the driving safety of large trucks in continuous downhill section of highways. The driving characteristics of large trucks going downhill under the condi- tion of engine auxiliary braking were analyzed. Based on the brake drum temperature and speed characteristics,it was proposed that there is a necessity to construct an exclusive low-speed lane in continuous long downhill section of highways for large trucks. Taking the six-axis articulated vehicle as the guiding type,the low-speed lane structure system was studied for the driving safety of articulated vehicles when going downhill. the setting method of the low- speed lane was clarified. The lane structures including transition section,buffer zone,steady speed zone and its linear shape were proposed. Then the reasonable speed limit and recommended gear of the low-speed lane was ana- lyzed. Finally,taking a long downhill slope in G5 Jing-kun highway as an example,the temperature rise value of the truck brake drum under various traffic modes was simulated,and the passing safety of the low-speed lane was verified. The results show that,compared with the temperature of brake drum in downhill of free-flow speed lanes and in downhill of limit speed lanes,the temperature of brake drum on downhill bottom of the slow-speed lane is re- duced by 114 and 79 ℃,respectively,and the cooling amplitude can reaches 32. 9% and 25. 3% ,respectively. The maximum temperature in the low-speed lane section is lower than the critical safety temperature. It indicates that setting a low-speed lane in the continuous long downhill section can greatly reduce the rising temperature of the brake drum as well as the probability of brake failure.

Key words: road engineering, low-speed lane, downhill characteristics, continuous long downhill, brake tem-perature rising

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