摘要
基于弹性层状体系理论,利用BISAR软件,计算了FWD标准荷载作用下结构层动态模量、厚度以及层间粘结状态对路表弯沉盆的影响。计算结果表明：路基模量是影响路表弯沉大小的主要因素,路基模量减小造成弯沉盆的整体下移;面层模量主要影响荷载中心外20cm范围内的弯沉,基层模量的影响范围为30-120cm;结构层中基层厚度对路表弯沉盆影响较大;层间出现滑移后,路表弯沉迅速增大。当ALK=10时,最大弯沉增幅可达27.13%。
The object of this study is to analyze the surface deflection behavior of the asphalt pavement with different layer parameters based on the multi-layer elastic system theory using BISAR.The analysis result indicates that subgrade modulus is the main factor influencing the deflection basin and can lead to an entire movement of deflection basin.The main impact area of asphalt surface modulus is within 20 cm of load center,and 30 to 120cm from the load center for subgrade modulus.The base thickness had a greater influence on the deflection basin than surface thickness.Surface deflection increased quickly once cutting-slippage between the base and surface appeared.When ALK was 10,the growth rate of the deflection on load center can reach 27.13%.
出处
《交通科学与工程》
2015年第1期27-32,共6页
Journal of Transport Science and Engineering
关键词
FWD
路表弯沉盆
沥青路面
FWD
surface deflection basin
asphalt pavement
