The models were conducted to figure out the changes of bending moment on the existing tunnel lining caused by the jacking force, tail voids closure and the back grouting pressure on the new tunnel.

• 此外，施工中的隧道亦可能与营运中的隧道擦身而过，因此如何加强既存隧道的保护以及新挖隧道施工过程的管理与规划成为相当重要的课题。