结合多年来对北京地区旧路改建的设计与施工经验 ,介绍北京地区的一些重要公路改建的路基横断面 ,以及平面、纵断面设计中应注意的问题 ,同时又根据旧路路面状况 ,提出几种旧路补强的路面结构设计与施工做法 ,并进行了分析 Combined with years of experience in the design and construction of the reconstruction of old roads in Beijing, this paper introduces the cross-section of subgrade of some important road reconstruction in Beijing and the problems that should be paid attention to in the design of plane and longitudinal sections. At the same time, Kind of old road reinforcement pavement structure design and construction practices, and conducted an analysis