基于功能定位的公路市政化改造横断面设计研究

随着我国城镇化进程的推进,周边公路逐渐被纳入城区范围,亟需对城郊公路进行市政化改造以满足市政功能和交通需求,而横断面设计是改造工程的重点和难点.以公路与城市道路的功能差异性分析为基础,将城郊公路市政化改造路段分成市政功能为主和公路功能为主两类,结合改造横断面设计原则和决策因素,研究提出了以市政功能为主的改造横断面形式,...

Research on Cross-section Design of Highway Urbanization Reform Based on Functional Orientation

With the advancement of China's urbanization process,the surrounding highways are gradually incorporated into the urban area,and the urbanization of suburban highways is urgently needed to meet the municipal functions and traffic needs.The cross-section design is the major difficulty of the reconstruction project.Based on the analysis of the functional differences,this paper divides the suburban highways into urbanization-modified sections and focuses on the functions of municipalities and highways.Combining the design principles and decision-making factors of the cross-section of reconstruction Function-oriented transformation cross-section forms,double-road and four-way roads should be adopted for expressway and first-grade road reconstruction cross-section forms,single-width roads and three-way roads should be adopted for second-,third-,and fourth-grade roads;The main transformation cross-section form,the cross-section layout form should be spliced and widened on the existing roadbed.Finally,based on the surveyed vehicle width and the revised Polyakov model calculation and analysis,the width of the dedicated lane for the passenger car can be recommended to be 2.8 m when the design speed is low,the width of the middle lane can be appropriately narrowed,and a recommended table of minimum width values for different types of motor lanes is given.