Under different soil humidity,axle weight of vehicle and traveling speed,field driving test was carried out on K 18+610 test section of Nanning-Zhanjiang Expressway to study the dynamic response law of Guangxi residual red clay roadbed under different humidity conditions and put forward design and construction measures suggestions.The results show that:the dynamic characteristics decay faster in the region of 0-4.0 m in the transverse direction and 0-1.3 m in the depth direction,and when exceeding this range,the influence of driving action on the dynamic characteristics of the roadbed is smaller;with the increase of axle weight and speed,the dynamic stress,acceleration and dynamic displacement of the roadbed in different positions increase to different degrees;the change of the water content of the roadbed will lead to the degradation of the performance of the roadbed,but to the dynamic stress,acceleration and dynamic displacement and other dynamic characteristic indexes are affected differently.
关键词
高速公路/红黏土路基/不同湿度/动力特性/含水率/防排水/限重限速
Key words
expressway/red clay roadbed/different humidity/dynamic characteristics/water content/anti-drainage/weight and speed limit
维普
万方数据