机场柔性道面地基工作区深度研究  

Study on Service Depth of Airport Flexible Pavement Subgrade

作　　者：杨召焕[1] 程国勇[1] 

机构地区：[1]中国民航大学机场学院,天津300300

出　　处：《公路交通科技》2013年第10期11-17,43,共8页Journal of Highway and Transportation Research and Development

基　　金：中央高校基金项目(ZXH2009A002);中国民航大学校级重点科研项目(CAUC2009ZD0203);中国民航大学研究生科技创新基金项目(YJSCX12-27)

摘　　要：以附加应力等于地基自重应力的10％为标准，采用有限元方法分析了飞机荷载类型、面层厚度、柔性面层材料和土基回弹模量对地基工作区深度的影响。结果表明：飞机荷载类型对工作区深度的影响较为显著，飞机荷载分类为LC的轻型机型荷载在土基中产生的附加应力较小，影响深度较浅；荷栽分类为LD的中型飞机工作区深度约为3m左右；飞机荷载分类为LE的重型机型工作区深度可达8．2m。面层厚度和材料弯拉模量对影响深度影响很小。重型飞机作用下，土基回弹模量在20—80MPa内变动时，路基顶部一定深度范围内的附加应力值随着回弹模量的增加而减少，附加应力值由32．89MPa减至24．19MPa，减小幅度为26．46％，而该参数对工作区深度的影响甚微。Taking the additional stress equals to 10% of ground stress as the criterion, finite element method is applied to analyse the influence of aircraft load type, surface layer thickness, flexural surface layer material and rebound modulus of subgrade on subgrade service depth. The results show that （1） the influence of aircraft load type on the service depth is relatively distinct, the additional stress in subgrade under the action of light aircraft whose aircraft load classification is LC is much smaller and the service depth is much shallower, the service depth under the action of medium aircraft whose aircraft load classification is LD is around 3 m, and the service depth of heavy aircraft whose aircraft load classification is LE reaches 8.2 m; （2） the thickness of surface layer and the flexural modulus of asphalt affect the service depth very slight; （3） under the condition of heavy aircraft load and the subgrade resilient modulus in 20 -80 MPa range, additional stress in the top area of subgrade decreases with the increase of resilient modulus, and additional stress value decreases from 32. 89 to 24. 19 MPa by 26.46%, but the effect of subgrade resilient modulus on server depth is much slighter.

关 键 词：道路工程 工作区深度 有限元分析 附加应力 机场道面 

分 类 号：U421[交通运输工程—道路与铁道工程]