凝冰路段抗滑性能衰变规律及安全速度分析  

Decay Law of Anti-skid Performance and Safety SpeedAnalysis on Icy Road Sections

作　　者：田应元 张露 左琳明 徐振华 TIAN Yingyuan;ZHANG Lu;ZUO Linming;XU Zhenhua(GuiZhou Province Kaili Highway Management Bureau,Kaili,Guizhou 562400,China;Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]贵州省凯里市公路局,贵州凯里556099 [2]重庆交通大学,重庆400074

出　　处：《黑龙江交通科技》2024年第10期6-13,18,共9页Communications Science and Technology Heilongjiang

基　　金：贵州省公路局科技项目(2022QLK09);重庆市教育委员会,省部级(KJQN202200707);重庆市科学技术局,博士后科学基金项目(CSTB2022NSCQ-BHX0042);重庆市交通大学科研启动经费项目,校级项目(F1220026)。

摘　　要：我国南方山区路段在冬季易出现凝冰现象,导致路面附着系数急剧降低,车辆在凝冰路面行驶时极易出现轮胎打滑、横向失稳、制动距离显著增加,交通事故频发现象。为研究凝冰路段的抗滑性能,以贵州省G321线丹寨段为例,通过现场调研并采集该路段路面抗滑性能、行车速度等数据,通过指数衰减摩擦模型分析凝冰路面抗滑性能衰变规律,考虑路面抗滑衰变特性、超高、平曲线半径等因素对凝冰路段车辆侧向滑移机理进行了研究,并从车辆横向稳定性和停车视距两个方面分析凝冰道路安全行车速度。结果表明,凝冰路段的抗滑性能较一般路段降低约20%,安全行车速度降低至45 km/h左右,分析结果能够为凝冰路段行车安全管理提供理论依据。China's southern mountainous road sections in winter is prone to ice phenomenon,resulting in a sharp decrease in the adhesion coefficient of the road surface,the vehicle is very easy to tire skidding,lateral instability,braking distance increased significantly when driving on the ice,traffic accidents occur frequently.In order to study the anti-skid performance of icy road sections,for example,the Danzhai section of the G321 line in Guizhou Province,through on-site research and collection of anti-skid performance of the road section,driving speed and other data,through the exponential attenuation friction model to analyze the anti-skid performance of the icy road surface degradation law,taking into consideration of anti-skid decay characteristics of the pavement,super-high,flat curve radius and other factors of icy road section of the vehicle sideways slippage mechanism has been investigated and analyzed the lateral stability of the vehicle and stopping sight distance in two aspects of icy road.It also analyzes the safe driving speed of icy road from the aspects of vehicle lateral stability and stopping sight distance.The results show that the anti-skid performance of the icy road section is about 20%lower than that of the general road section,and the safe driving speed is reduced to about 45 km/h.The analyzed results can provide theoretical basis for the safety management of the icy road section.

关 键 词：凝冰路面 抗滑性能 安全行车速度 横向失稳 

分 类 号：U416.2[交通运输工程—道路与铁道工程]