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- W597847822 abstract "This article describes in detail the difficulties faced in the construction of the Schoenrain railway tunnel in Germany, and how they were handled. The twin-track tunnel is near Gemuenden in Bavaria, and forms part of a curve connecting the Frankfurt to Werzburg railway line with the new high-speed line from Hanover to Wuerzburg. The tunnel is 3942m long with a maximum longitudinal slope of 12.5%. The maximum overburden above it is 160m, and it passes under the existing Muehlberg rail tunnel. The geology of the ground is very complicated and difficult, with various rock types and groundwater types, and nearly vertical shear zones, faults and joints. About 80% of the tunnel is below a groundwater table with discontinuous joints, so that water inflow was a severe problem. During the excavation of the bench an invert, longitudinal crack occurred in the shotcrete roof lining for about 8% of the tunnel's length. The tunnel was excavated using the New Austrian Tunnelling method (NATM). An invert arch was constructed in sections subject to rock pressure and in weak rock zones. In stable to friable rock conditions, a 500mm thick watertight invert slab was formed. Settlements were limited by: (1) a short advance length of 1m in the top heading; (2) rigid support by 250mm thick shortcrete and steel arches; and (3) use of immediately effective Atlas Copco 'Super- Swellex' and prestressed rockbolts." @default.
- W597847822 created "2016-06-24" @default.
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- W597847822 date "1994-11-01" @default.
- W597847822 modified "2023-09-27" @default.
- W597847822 title "DIFFICULT CONDITIONS AT SCHOENRAIN" @default.
- W597847822 hasPublicationYear "1994" @default.
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