饱水沥青路面孔隙水压变化的影响因素  

Influencing Factors of Pore Water Pressure Variation in Saturated Asphalt Pavement

作　　者：刘彦涛 吕耀志 侯东伟 张君韬 LIU Yan-tao;LYU Yao-zhi;HOU Dong-wei;ZHANG Jun-tao(Tianjin Jingang Infrastructure Maintenance and Operation Engineering Management Co.Ltd.,Tianjin 300450,China;Tianjin Municipal Engineering Design and Research Institute Co.Ltd.,Tianjin 300051,China;Tianjin Key Enterprises Laboratory of Infrastructure Durability,Tianjin 300051,China;School of Naval Architecture,Ocean&Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;CCCC Shanghai Harbor Engineering Design and Research Institute Co.Ltd.,Shanghai 200032,China)

机构地区：[1]天津津港基础设施养护运营工程管理有限公司,天津市300450 [2]天津市政工程设计研究总院有限公司,天津市300051 [3]天津市基础设施耐久性企业重点实验室,天津市300051 [4]上海交通大学船舶海洋与建筑工程学院,上海市200240 [5]中交上海港湾工程设计研究院有限公司,上海市200032

出　　处：《公路》2024年第12期93-98,共6页Highway

基　　金：天津市重点研发计划科技支撑重点项目,项目编号20YFZCSN01080。

摘　　要：在孔隙水压作用下,水流的冲刷和正负压抽吸是使沥青路面发生水损害的主要原因之一。为减弱其对路面结构的破坏,通过建立饱水沥青路面动力响应分析有限元模型,深入探究了不同交通条件、路面参数等对孔隙水压的影响。结果表明:车辆荷载和车速越大,越不利于控制孔隙水压力,当车辆荷载达1.3 MPa时孔隙水压可达1 MPa,当车速由40 km/h提至120 km/h后孔隙水压提升57.1%,故路面水损害设计时应限制车辆荷载和车速;此外,通过设置排水面层、提高沥青面层的弹性模量和渗透系数,可有效降低孔隙水压力,但设置排水边界对孔隙水压力没有显著影响。Under the action of pore water pressure,water scouring and positive and negative pressure suction are one of the main reasons for water damage to asphalt pavement.In order to reduce its damage to the pavement structure,the dynamic response analysis finite element model of saturated asphalt pavement is established,and the influence of different traffic conditions and pavement parameters on the pore water pressure is deeply explored.The results show that the greater the vehicle load and speed,the less conducive to controlling the pore water pressure.When the vehicle load reaches 1.3 MPa,the pore water pressure can reach 1 MPa.When the vehicle speed is increased from 40 km/h to 120 km/h,the pore water pressure is increased by 57.1%.The vehicle load and speed should be limited in the design of road water damage.By setting the drainage surface layer and increasing the elastic modulus and permeability coefficient of the asphalt surface layer,the pore water pressure can be effectively reduced,but the setting of the drainage boundary has no significant effect on the pore water pressure.

关 键 词：公路工程 沥青路面 有限元模型 孔隙水压力 交通条件 路面参数 

分 类 号：U416.217[交通运输工程—道路与铁道工程]