软岩隧洞的开挖支护研究--以悬臂式掘进机的应用为例

摘要

In excavation of the Great Manila water supply tunnel project in Philippine with cantilever-type boring ma-chine, difficulties in excavation supporting are experienced due to the geological condition of soft rock.Thus, improved supporting techniques are proposed and successfully adopted.Basic principles and implementation points of the improved techniques are summarized.%结合悬臂式掘进机在菲律宾大马尼拉供水隧洞的应用情况，针对施工过程中存在的主要问题，开展了悬臂式掘进机开挖支护技术研究，提出了解决办法和改进思路，总结了软岩隧洞悬臂式掘进机开挖支护所遵循的基本原则和实施要点。