大型江底地下互通式立交枢纽建造技术研究

重庆两江隧道工程拟用隧道的方式构建江底全互通式立交,采用钻爆法施工,共有6处平交、4处近距离立交隧道。采用数值分析的方法对大型江底地下互通式立交枢纽建造全过程的施工力学行为进行分析研究,在此基础上结合已建成类似工程,提出江底钻爆法隧道间的平交段与近距离重叠立交段的关键设计参数,如:隧道平交段与近距离重叠立交段合理间距。建立大型江底地下互通式立交平交段和立交段的设计与施工方法及其施工组织方案,特别是钻爆法隧道之间的平交和立交施工方案。对地下互通式立交枢纽建设中的核心问题进行研究,在世界上首创地下互通式立交枢纽修建模式,具有重要的理论意义和实际应用价值。

A study of the construction technology of large-scale under-river interchange tunnels

Large-scale underground interchange tunnels,with six crossings and four interchanges,will be built using NATM for the Chongqing Two Rivers Tunnel project. The construction process and the mechanical behavior for the underground interchanges are analyzed via numerical analysis,with consideration of similar projects already completed,and then design parameters about the crossings and close overlap interchanges between NATM tunnels,such as the proper spacing of crossings,are suggested. The design and construct...