第 24 卷2007 年 4 月 第 4期 公路交通科技 Journal of Highway and Transportation Research a n d Development V o1. 24 No . 4 A pr . 200r7 文章编号 :1002_0268 (2007) 04-0001-06 路面载重车辆的荷载特征 孟 岩 ,郭林泉 ,谈至明 20(092;2. 广东广韶高速公路有限公司,广东‘ ( 1. 同济大学道路与交通工程教育部重点实验室,上海清远51 31 0 0 ) 摘要:在收集了我国公路上行驶的单、双后轴整车型的载重车辆轴载资料的基础上 ,参考国家现行轴限规定与轮胎型 号等标准,从路面结构设计的角度上对轴载、轮胎气压、接地压力、轴型参数等荷载特征参数进行了整理分析,采用 统计回归方法找到了特征参数的规律和相互关系,进而提 出了供路 面结构设计的轴型参数:双轮间距、轮距、轴距按 额定轴载进行分级的建议表 ,以及 以后轴额定轴载和轴载实载率为 自变参量的轮胎接地压力的统一回归式和回归系 数,讨论了现行沥青路面结构分析中双轮中心距取 3倍荷载当量圆半径宜根据额定轴载和轴载实载率确定适用范围。 此研究结果为提高路面结构分析精度提供了可靠的荷载特征参数依据。 关键词:道路工程;路面结构 ;回归分析;荷载特征参数;接地压力;轮间距 中图分类号 :U416. 02 文献标识码 :A Loading C ha racte ristics for T rucks O perating on Highway ME N G Y an‘ , G UO L in— quan2,TA N Zhi— ming‘ (1. The Key Laboratory o f Road a n d Traff i c En舀 neering Ministr y o f Education,To ngji University ,S~ ng h ai 200092,China; 2. Guangshao Expressway Co. Ltd. ,Gn a ngdo ng Qingyuan 51310 0 ,China) kd 3stract: T h e author s studi ed the relation between load i ng characteristi cs o f trucks a n d pavement str u cture design, through a n al yzing t he co llected axle load datafo r single a n d double rea r axle o f straig h t tr u cks on n a tiona l hig h way,in the li o f t he existing sta n dards o f axle loa d limit a n d tire type etc , taking into account of lo a d i ng char a cter i stics parameter s , axl e load, tim pressure a n d axle type ete to f i nd out their co— relations with regressi on a n a l ysis. Based on t h e study ax le type parameter s used for pavement desig n incl ud i ng dua l wheel spaci ng, wheel gauge, wheelbase according to t h e g r ade o f rated load a r e pr o posed in form o f tabl e ,w it h independem vari able of the rati ng ax le lo a d a n d factua l load factor , reg r es~ d eoef l i eiems a n d formula for tire cont a ct pressure , at t h e sal ne time , accordi ng to the rated axle load a n d factua l load fa c t o r , the appl ica b ility o f equiva l ent load radius equa l s to tri na l d i stance b e t w een dua l wheel center s in present a s pha l t pavement str u cture a n a l ysis is discussed. T h e research resultants Ca n provide rel ia b le truck l oad i ng cha r acter i sti c parameter s to improve the a c curacy o f pavement structure a n al ysis. Key words :ma d engineer i ng ;pavement structure ; reg r ession a n a l ysis ;load i ng character i stics pa r ameter s ; t i re cont a ct pressure ; w heel gauge 0