改扩建高速公路的路线设计原则及要点分析

Design Principle and Gist Analysis on Reconstruction and Extension of Expressway Route

随着我国经济发展和交通运输增长,越来越多的道路结构不能满足运输和通行要求,面临改扩建挑战。剖析了改扩建高速公路的路线设计原则,同时分析了改扩建高速公路的线路设计内容,分别从线形设计、平面线形拟合、纵面线形拟合、道路横断面设计四个方面阐述了关键设计要点和解决方案,最后通过一个工程案例说明了改扩建高速公路的路线设计方法,充分利用旧有道路资源,同时满足现有道路设计标准和要求。

Along with the rapid development of economy and transportation in China,more and more road structures cannot satisfy the demand of traffic capacity,and are confronted with reconstruction and extension.This paper analyzes the route design principles of expressway reconstruction and extension,also analyzes the route design contents of expressway reconstruction and extension,sets forth the key technical gist and solution from four aspects of alignment design,plane alignment fitting,longitudinal alignment fitting and road cross section design,and finally illustrates the route design method of expressway reconstruction and extension fully to utilize the existing road resource and also to satisfy the existing road design standard and requirement by an engineering case.