一、引言公路桥涵桥头跳车是桥涵与路面衔接处沉降不均,或交接段引道纵坡与桥面纵坡的不一、衔接不顺,或桥梁端与桥台之间的伸缩缝不平整而引起行车跳动、颠簸现象。在全国几乎所有的路段上都存在这种现象,特别是在一些有软土地基地方更为严重,这就严重的影响了行车舒适与道路交通安全,给人们的出行留下了安全隐患,也给公路养护部门的工作提出了更高的要求。虽然对桥头 I. INTRODUCTION Highway head and bridge bridge head jumper is uneven convergence of bridges and culverts and pavement, or the intersection of the longitudinal section of the approach roadway and the deck longitudinal slope are different, the connection is not smooth, or between the bridge end and the abutment expansion joint is not Smooth and cause driving beating, bumpy phenomenon. This phenomenon occurs in almost all sections of the country, especially in some places with soft ground. This seriously affects traffic comfort and road traffic safety and leaves a safety hazard for people’s travel. To the highway maintenance department put forward higher requirements for the work. Although on the bridgehead