沥青路面孔隙水压力影响因素敏感性研究  

Sensitivity Study on Factors Influencing Pore Water Pressure of Asphalt Pavement

作　　者：张志静 蒋敏敏[2] ZHANG Zhijing;JIANG Minmin(Zhengzhou University of Science and Technology,Zhengzhou 450064,China;Henan Forestry University,Zhengzhou 450001,China)

机构地区：[1]郑州科技学院,河南郑州450064 [2]河南工业大学,河南郑州450001

出　　处：《河南科技》2024年第15期66-69,共4页Henan Science and Technology

基　　金：省属高校基本科研业务费项目(2020ZKCJ05);河南省教育厅自然科学项目(23B560002)。

摘　　要：【目的】研究沥青路面孔隙水压力影响因素的敏感程度。【方法】采用数值模拟的方法,利用COMSOL有限元软件,基于流-固耦合理论建立路面结构足尺模型,分析面层模量、渗透系数、车速、轴载对孔隙水压力的敏感程度。【结果】数值模拟结果表明,孔隙水压力随面层模量的增加呈减小规律,随车速和轴载的增加呈增大规律,但孔隙水压力随渗透系数的变化呈先增大后减小趋势,渗透系数为1×10^(-6) m/s时,正孔隙水压力出现最大值。4种影响因素中,面层模量和车速对孔隙水压力的影响程度相当且影响程度较小,渗透系数和轴载对孔隙水压力影响程度相当且影响程度较大。【结论】根据孔隙水压力影响程度幅值结果可知,孔隙水压力对各因素的敏感性由高到低依次为渗透系数、轴载、车速、面层模量。[Purposes]This paper aims to study the sensitivity of the influencing factors of pore water pres-sure of asphalt pavement.[Methods]This article adopts numerical simulation method and uses COMSOL finite element software to establish a full-scale model of pavement structure based on fluid-structure coupling theory.The sensitivity of surface modulus,permeability coefficient,vehicle speed,and axle load to pore water pressure is analyzed.[Findings]The numerical simulation results show that the pore water pressure decreases with the increase of surface modulus,and increases with the increase of vehicle speed and axle load.However,the pore water pressure first increases and then decreases with the change of per-meability coefficient,and with a permeability coefficient of 1×10^(-6)m/s,the maximum positive pore water pressure occurs.Among the four influencing factors,the surface modulus and vehicle speed have a simi-lar and relatively small impact on pore water pressure,while the permeability coefficient and axle load have a similar and relatively large impact on pore water pressure.[Conclusions]According to the ampli-tude results of the influence of pore water pressure,it can be concluded that the sensitivity of pore water pressure to various factors is ranked from high to low as permeability coefficient,axle load,vehicle speed,and surface layer modulus.

关 键 词：沥青路面 流-固耦合 孔隙水压力 数值模拟 

分 类 号：U416.223[交通运输工程—道路与铁道工程]