一、简叙近些年来,城市建设、工业、民建、交通等事业发展比较快,原有的道路远远不能满足形势发展的需要,因而今后会有大量的旧路扩建任务。在城市沥青道路扩建施工中,经常会遇到新路与旧路纵、横衔接问题;附属结构物及各种管线检查井衔接问题。而这些衔接部位在通车放行后数月、数年出现沉降和变形,其原因有设计、施工以 I. Brief Introduction In recent years, urban construction, industry, civil construction and transportation have enjoyed rapid development. The existing roads are far from meeting the needs of the development of the situation. Therefore, there will be a large number of tasks for expanding the old roads in the future. Asphalt pavement expansion in urban construction, often encounter the new road and the old road, horizontal convergence problems; subsidiary structures and various pipeline inspection well convergence problem. These joints in the opening after the release of a few months, a few years of settlement and deformation, the reasons for the design, construction