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Date: 2013-10-15 06:31:55Land transport Geotechnical engineering Rock mass classification New Austrian Tunnelling method Channel Tunnel Balfour Beatty NATM Heathrow Express Alan Muir Wood Transport Tunnels Construction | GroBbritannien United Kingdom Heathrow failures highlight NATM (abuse?) misunderstandings Shani WallisAdd to Reading ListSource URL: www.tunneltalk.comDownload Document from Source WebsiteFile Size: 342,98 KBShare Document on Facebook |