高聚物加固沉陷机场道面的承载性能分析  

Analysis of bearing capacity of airport pavement with polymer reinforcement subsidence

作　　者：程国勇[1] 陈鹏鹏 

机构地区：[1]中国民航大学机场学院,天津300300

出　　处：《中国民航大学学报》2018年第1期47-52,共6页Journal of Civil Aviation University of China

摘　　要：采用高聚物材料对沉陷超标的机场道面进行不停航加固处理是一个新的发展方向,由于承载性能等安全方面的考虑,目前国内机场尚无工程实践。首先通过数值模拟方法研究了在道面板不同部位的板底加注高聚物的约束力,根据高聚物材料凝固时的密度-约束力关系可得到高聚物凝固体的密度,研究结果表明,基于中国常见的道面结构参数,板角加注高聚物材料可得到的密度为0.303~0.372 8 g/cm^3,板边加注高聚物材料可得到的密度为0.263~0.315 g/cm^3,板中加注高聚物材料可得到的密度为0.207~0.25 g/cm^3。在此基础上分析了不同沉陷程度的道面采用高聚物抬升调平后承载力的改善程度,研究结果表明,在板角部位注浆,道面板底弯拉应力减小9.5%~25.7%;在板边部位注浆,道面板底弯拉应力减小7.1%~23.1%;在板中部位注浆,道面板底弯拉应力减小3.5%~20.3%。It is a new developing direction to caITy out non--stop reinforcement of airport pavement with excessive polymer material. Considering safety factors such as bearing performance, there is no engineering practice at domestic airports. Firstly, the polymer constraining force at channel bottom is studied by numerical simulation. Density of polymer solidified body is obtained according to the density-constraining force relationship when the polymer material is solidified. Results show that the degree of common pavement structure parameters based on slab corner filling polymer materials can be obtained with density of 0.303~0.372 8 g/cm3, density of polyer material at the edge of the plate is 0.263N0.315 g/cm~, density of polyer material at middle plate is 0.207~0.25 g/cm3. Based on the above results, the improvement of bearing capacity of pavement with different degrees of subsidence is analyzed. Results show that the bending stress at the bottom of pavement is reduced by 9.5%N25.7% at the plate angle, and this stress at the bottom of pavement is reduced by 7.1%-23.1% at the plate edge, pavement bottom bending stress is decreased by 3.5%~20.3% at the plate position.

关 键 词：机场跑道 地基沉陷 道面承载力 高聚物注浆 地基加固 

分 类 号：V351.11[航空宇航科学与技术—人机与环境工程]