Engineering NATM (New Austrian Tunneling Method ) in Tunneling

1 NATM (New Austrian Tunneling Method ) in Tunneling Def of Tunneling: Underground passage dug though hill, under road or river etc. for passage of road, train etc. Various…

Documents Tunnel Excavation Methods

1 NATM (New Austrian Tunneling Method ) in Tunneling Def of Tunneling: Underground passage dug though hill, under road or river etc. for passage of road, train etc. Various…