论文部分内容阅读
瑞士铁路要求快速通过阿尔卑斯山,规划修建两座山麓隧道,即50km长的Gotthard隧道和30km长的Ltschberg隧道。前者大部分区段埋深在1000m以上,最大埋深达2000m。
The Swiss Railways require rapid excursions through the Alps and the planning of two foothills, namely the 50km Gotthard Tunnel and the 30km Ltschberg Tunnel. Most of the former section depth of more than 1000m, the maximum depth of 2000m.