公路施工便道圆曲线半径与加宽设计指标  

Radius and widen value of circle curve of highway pioneer road

作　　者：杨永红[1,2] 朱冠儒 王醇 郑涛 张宇 YANG Yong-hong;ZHU Guan-ru;WANG Chun;ZHENG Tao;ZHANG Yu(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China;Key Laboratory of Highway Engineering of the Ministry of Education,Changsha University of Science&Technology,Changsha 410114,Hunan,China;Guangdong Provincial Key Laboratory of Tunnel Safety and Emergency Support Technology and Equipment,Guangzhou 510545,Guangdong,China)

机构地区：[1]华南理工大学土木与交通学院,广东广州510640 [2]长沙理工大学公路工程教育部重点实验室,湖南长沙410114 [3]广东省隧道工程安全与应急保障技术及装备企业重点实验室,广东广州510545

出　　处：《长安大学学报（自然科学版）》2024年第3期43-53,共11页Journal of Chang’an University(Natural Science Edition)

基　　金：广东省重点领域研发计划项目(2022B0101070001);广东省基础与应用基础研究项目(2021A1515011788);长沙理工大学公路工程教育部重点实验室开放基金项目(kfj190201)。

摘　　要：为补充便道线形设计指标选择依据,提高便道建设质量和通行安全,从便道运输车辆特点出发,研究便道半径与加宽2个平曲线关键指标。首先,调研中国9条高速公路及1条省道建设工程中的便道建设情况,选用挖掘机、自卸车、半挂汽车列车和运梁车作为代表车型。然后,根据车辆结构与道路几何关系计算车辆空间通过性,得到自卸车、半挂车和运梁车3种代表车型加宽值设置要求和半径通过性限值,提出基于重型车辆重心后移的自卸车和半挂汽车列车横向稳定性验算方法。最后,对比横向摩擦因数为0.3和0.8的2种便道在不同超高条件下受横向稳定性限制的圆曲线半径值与采用公路横向力系数计算所得的半径值,并推荐出对应代表车型的平曲线关键指标以供便道设计参考。研究结果表明:自卸车与半挂汽车列车半径通过性限值为12 m,整体式运梁车为48 m,牵引式运梁车为14.5 m,具体车型要求的便道半径与加宽值差别较大;影响车辆横向稳定性主要因素为速度、重心位置和路面摩擦因数,在路面横向摩擦因数为0.3情况下,车辆较容易发生横向滑移,在路面横向摩擦因数为0.8情况下,车辆较容易发生横向倾覆;提高超高可显著降低一般最小半径值,对横向稳定性影响较小;自卸车和半挂汽车列车转向半径采用横向力系数计算所得值均符合横向稳定要求。In order to supplement the design indicators for pioneer road alignment,improve the quality of pioneer road construction and ensure transportation safety,starting from the characteristics of pioneer road transport vehicle,radius and widen value as two key parameters were studied.Firstly,four representative vehicles were selected,excavators,dump trucks,semi-trailer trains,and beam carriers by investigating the construction situation of pioneer roads in 9 expressway and 1 provincial road projects in China.Subsequently,the space passing ability of vehicles was calculated based on the relationship between the vehicle structure and the road geometry,and the required widening values and radius passing ability limits for dump trucks,semi-trailers,and beam carriers were obtained,a lateral stability verification method was proposed based on the backward shift of vehicle gravity center for dump trucks and semi-trailer trains.Finally,a comparison was made between the radius values of circular curves under the different superelevation of lateral stability constraints for two types of pioneer roads with different lateral friction coefficients(0.3 and 0.8),and the radius values were calculated using the pavement friction coefficient.Key indicators for horizontal curves corresponding to representative vehicle models were recommend and can be used as a reference for pioneer road design.The results show that the radius passing ability limits for dump trucks and semi-trailer trains are 12 m,48 m for monolithic beam carriers,and 14.5 m for towed type beam carriers.There is a significant difference in the required pioneer road radius and widen values for specific vehicle types.The main factors affecting vehicle lateral stability are speed,center of gravity position,and pavement friction coefficient.In the condition of a lateral friction coefficient of 0.3,vehicles are more prone to lateral sideslip,while in the condition of a lateral friction coefficient of 0.8,vehicles are more likely to lateral rollover.The minimum radius value ca

关 键 词：道路工程 施工便道 圆曲线半径 加宽值 通过性 转向稳定性 

分 类 号：U412.33[交通运输工程—道路与铁道工程]