复杂交通流下高速公路立交改扩建方案研究

Research on the Reconstruction and Expansion Plan of Expressway Interchanges under Complex Traffic Flow

随着现如今城市工业布局调整,作为交通节点的已建高速公路互通式立交由于交通需求的增加和复杂的路网状况,面临着巨大的挑战和压力。尤其是在大流量条件下,该类立交改扩建的需求更为迫切。以杭甬高速柯桥互通立交改建工程项目为依托,通过对杭甬高速公路及柯桥区城市路网规划的现状进行分析,对其交通量进行预测,在需要增加北部区域交通流转换节点的总体方案下,通过综合考虑交通流量、经济性、施工难度、施工期间交通组织等多方面因素,提出了改建互通的选型及施工期间的保通方案,以期为今后类似互通方案的改建提供借鉴。

With the current adjustment of urban industrial layout,the existing expressway interchanges,as transportation nodes,face enormous challenges and pressures due to the increase in the traffic demand and complex road network conditions.Especially under high flow conditions,the renovation and expansion of such interchanges have become more urgent.Based on the Reconstruction Project of Hangzhou Ningbo Expressway Keqiao Interchange,this paper analyzes the current situation of the urban road network planning for the Hangzhou Ningbo Expreway andKeqaoDistrict,and predictsits trafic volume.Underthe overall planof adding trafficflow conversion nodes inthe northern region,various factors such as traffic flow,economy,construction difficulty,and traffic organization during construction are comprehensively con sidered.In order to provide reference for the reconstruction of similar interworking schemes in the future,the selection of interworking schemes and the scheme of guaranteeing communication during construction are put forward.