中文摘要：

为提高高速公路软基过渡段车辆行驶的舒适性,通过建立车辆垂向振动分析模型和有限元仿真模型,分别分析了过渡段长度和分段与高速公路软基过渡段差异沉降的关系。结果表明,过渡段长度和分段对高速公路软基过渡段均衡沉降影响较大。车辆垂向振动加速度随着差异沉降量和沉降坡度差的增大而增大;对于标准速度为120km/h的高速公路,当过渡段长度大于8m时,采用的均衡沉降控制标准宜为差异沉降量,差异沉降控制标准为差异沉降量2.3cm,当过渡段长度小于8m时,采用的均衡沉降控制标准宜为沉降坡度差,差异沉降控制标准为沉降坡度差0.3%;采用两种桩间距比采用同种桩间距的过渡段差异沉降减少约35%~50%。

英文摘要：

In order to improve vehicle＇s driving comfort in the highway soft foundation transition section,the relationship of the transition section length and subsection on the differential settlement were analyzed respectively through the established vehicle vertical vibration analysis model and finite element simulation model.The experimental results show that the soft foundation transition section isostatic settlement is impacted largely by the transition section length and subsection.With the increase of differential settlement and slope difference of settlement,the vehicle vertical vibration increases correspondingly.At the rate of 120km/h for a highway standard,when the transition section length is more than8 m,differential settlement is used as control standards of isostatic settlement,differential settlement 2.3cm is adopted as control standards of differential settlement.When the transition section length is less than 8m,slope difference of settlement is used as control standards of isostatic settlement,slope difference of settlement 0.3%is adopted as control standards of differential settlement.The transition section differential settlement of two kinds of pile spacing is less than the same pile spacing about 35%~50%.