摘要
为了建立飞机滑行下道基动静模量相关分析模型,结合飞机滑行下道基应力水平、典型道基压实度和含水率范围、飞机滑行时常见频率区间,通过动静三轴试验分析了应力水平、压实度、含水率和频率对道基动静模量的影响规律,发现动静模量均与压实度和围压成正相关,与含水率成负相关,其中动模量在频率低于3 Hz时变化较为显著;同时借助动静模量试验数据,建立并验证了基于多因素的飞机滑行下道基动静模量相关分析模型,为机场场道工程设计和检测提供参考。
In order to establish dynamic and static modulus correlation analysis model of subgrade with taxiing aircraft,this paper considers the subgrade stress level of taxiing aircraft,compaction degree and moisture content of typical subgrade,and common frequency of taxiing aircraft.Dynamic and static triaxial tests are conducted to analyze the influence of stress level,compaction degree,moisture content and frequency on the dynamic and static modulus of subgrade.The results show that dynamic and static modulus are positively correlated with the compaction degree and confining pressure,and negatively correlated to the moisture content.Especially,the variation amplitude of dynamic modulus is significant when the frequency is less than 3 Hz.Meanwhile,based on dynamic and static modulus measurement databases,dynamic and static modulus conversion system is established and verified with multifactor comprehensive function and taxiing aircraft.The research provides the reference for pavement design,construction,detection and maintenance.
作者
刘小兰
张献民
董倩
LIU Xiaolan;ZHANG Xianmin;DONG Qian(College of Civil Aviation,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Airport College,Civil Aviation University of China,Tianjin 300300,China;Schod of Civil Engineering,Tianjin University,Tianjin 300072,China)
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2019年第4期778-786,共9页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家自然科学基金(51178456)
中央高校基本科研业务费专项资金(3122017039)~~
关键词
动模量
静模量
含水率
压实度
频率
dynamic modulus
static modulus
moisture content
compaction degree
frequency
