公路改扩建设计的技术问题探讨

对旧路进行加宽改扩建是提高道路通行能力、改善车辆运行条件、降低运输成本的有效途径之一。本文结合我国旧路改扩建的现状及工程实践,对公路改扩建工程的详细调查,公路的路线平面线形、纵断面线形的设计方法,路基加宽方式的选择,新旧路面结构设计与补强,及桥梁设计中的关键技术进行了系统的分析,提出了道路设计详细调查、路线、路基路面、桥梁工程设计中的注意事项,保证公路改扩建工程的设计质量的工程措施,结论表明在旧路加宽改扩建工程中,对旧路进行系统的调查和设计中的平、纵、横线形及路基路面结构的综合设计是十分重要的,为提高旧路改扩建设计质量进行了有益的探索。

Discussion on Techniques of Design Highway Rebuilding and Widening

Highway rebuilding and widening is one of good methods of improving traffic capacity and driving conditions,and reduce cost of transportation.Combined the practice and present conditions of the highway rebuilding,the key techniques of design of the highway horizontal and vertical alignment,choosing widening mode of the subgrade,pavement and bridge of highway rebuilding,structural design and reinforcement and so on were discussed in this paper.The items of how to design the subgrade,pavement and bridge,and how to probe the conditions were also pointed out.The results showed that systematic investigation of old highway and integrated designs of structure were very important during the course of highway rebuilding and widening.It was helpful to improve the quality of the design of highway rebuilding.