Abstract Milling excavation is suitable for tunnels embedded in soft rocks. Construction technology and options by adopting milling machine are introduced. Comparison between drill and blast method and milling excavation is carried out in terms of construction safety, quality and schedule. Practice indicated that the combination of milling excavation and drill and blast is more safe and economic.
Keywords ：
Tunnel in soft rock Milling excavation Drill and blast method Comparison
Abstract ：
Milling excavation is suitable for tunnels embedded in soft rocks. Construction technology and options by adopting milling machine are introduced. Comparison between drill and blast method and milling excavation is carried out in terms of construction safety, quality and schedule. Practice indicated that the combination of milling excavation and drill and blast is more safe and economic.
Keywords ：
Tunnel in soft rock Milling excavation Drill and blast method Comparison
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2011, Vol. 48 