高速公路扩容既有枢纽互通改建方案研究

Research on theInterchange and Reconstruction Scheme of the Existing Hub for Expressway Capacity Expansion

随着国家高速公路网的逐年变化及更新,高速公路的扩容项目逐渐增多,扩容项目受控制因素较多,互通立交的布设是扩容项目的重点和难点,其中以扩容项目与既有枢纽互通的衔接交叉最为突出,笔者以沪昆国家高速公路扩容安顺至盘州段起点与既有普安高速、安顺西环高速交叉的十二里营枢纽互通为例,探讨了高速扩容项目与既有枢纽互通衔接设计中采取的技术思路、立交选型,可供同类型工程参考。

With the changes and renewal of the National Highway Network Year by year,the expansion projects of the highway have gradually increased,and the expansion projects are subject to more controlled factors.The layout of interchanges has become the focus and difficulty of the expansion projects,among them,the connection and intersection of the expansion project and the existing hub is the most prominent,the author takes the expansion of the hukun national highway from Anshun to Panzhou as an example of the interchange between the Shierliying junction,where the Pu'an County highway and the West Anshun Highway Intersect,this paper probes into the technical thinking adopted in the connection design between the high-speed expansion project and the existing hub,and the type selection of the grade separation,which can be used as a reference for the same type of project.