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应用COMSOL软件对交通荷载作用下低路堤高速公路路基沉降进行计算,总结交通荷载下低路堤高速公路路基沉降特点。计算结果表明:交通荷载引起的路基沉降主要发生在行车道的下,是车辙形成的主要原因;汽车前后轮间的差异沉降随车重增加而增加,随车流量增加而迅速增加,前后轮间的差异沉降是路面横向裂缝产生的主要原因;交通荷载引起的路基沉降主要发生在通车初期,通车前5年完成沉降的80%。
COMSOL software is used to calculate the subgrade settlement of expressway with low embankment under traffic load, and the settlement characteristics of subgrade under low traffic load are summed up. The calculation results show that the roadbed settlement caused by traffic load mainly occurs under the traffic lane, which is the main reason for the formation of rutting. The differential settlement between the front and rear wheels of the vehicle increases with the increase of the vehicle weight and increases rapidly with the increase of the traffic flow. The differential settlement is the main reason for the horizontal cracks in the pavement. The settlement of roadbed caused by traffic load mainly occurs in the early days of opening traffic and 80% of the settlement is completed in the 5 years before the opening of the road.