复杂用地条件下的城市快捷路总体方案研究

Research on Overall Scheme of Urban Expressway under Complex Land Use Conditions

摘要:

城市快捷路的建设对于优化城区骨架路网结构，提高交通运行效率具有良好的效果。为改善福州市西片区的交通拥堵，新增建设南北向城市快捷路是迫切的。根据建设条件、设计原则及功能定位等方面进行路线的多方案比选，确定路线基本走向。针对平面用地问题，采用了置换地、上下叠层布置、多形式组合支档结构等方案来解决，同时运用小直径锁扣式管幕超前支护，实现超浅埋大断面小净距隧道的穿越。至今，项目南段工程已建成通车，现对该类前期无规划用地预留，在复杂用地条件下建设的城市快捷路进行了总结，以期为同类项目提供一定的借鉴与参考。

Abstract:

The construction of urban expressways has a significant impact on optimizing the urban road network structure and enhancing the traffic efficiency. To alleviate the traffic congestion in the western area of Fuzhou City, it is urgent to build a new north-south urban expressway. Based on the construction conditions, design principles, functional orientation and other factors, the multiple route schemes are compared to determine the basic alignment. To address land use challenges at the ground level, the solutions such as land replacement, vertically stacked layouts and combined retaining structures in various forms are adopted. Additionally, the small diameter latching type tube curtain advance support is utilized to realize the crossing of ultra-shallow buried tunnel with large section and small clear distance. To date, the southern section of the project has been completed and opened to traffic. The urban expressways built under complex land conditions without planning land reserve for such projects are summarized in order to provide some insights and references for similar projects.