正在建设的悉尼港水下隧道全长2300m,其中1000m为沉埋管段,两端在砂岩中分别掘进900m和400m。这座隧道位于环境敏感地区,那里有悉尼港大桥和水上歌剧院,并要求与两岸现有道路系统连接好。它的走向应与港湾基床地层相适应,使沉埋管段尽可能座落在 The under construction Sydney Harbor Tunnel has a total length of 2300m, of which 1000m is a buried pipe section with 900m and 400m of sandstone dug at each end. The tunnel is located in an environmentally sensitive area with the Sydney Harbor Bridge and the Water Opera House and calls for connections to existing road systems across the Taiwan Strait. Its direction should be adapted to the basement of the harbor so that the buried pipe section is located as far as possible