2007•Unpublished venueRequires access

EVALUATION OF LARGE TUNNELS IN POOR GROUND— ALTERNATIVE TUNNEL CONCEPTS FOR THE TRANSBAY DOWNTOWN RAIL EXTENSION PROJECT

Steve Klein, Jacobs Associates, David Hopkins, Bradford F Townsend, Hatch Mott McDonald, Derek Penrice, Ed Sum

Abstract

The Transbay-Caltrain Downtown Extension (DTX) Project involves the construc-tion of an approximately 1.5-mile rail line that will extend Caltrain commuter service and the future California High Speed Rail system into downtown San Francisco. The underground rail extension will be constructed by mined tunnel and cut-and-cover

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Available abstract

Key concepts: New Austrian Tunnelling method, Downtown, Railway tunnel, Engineering, Excavation, Section (typography), Civil engineering, Track (disk drive)