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Title:	Long-term observation of geotechnical structures
Abstract:	The Pflaurenz Tunnel, which is roughly 1 km long, is being built to provide a bypass which relieves pressure on the St. Lorenzen municipality in South Tirol. Half of the tunnel (approx. 417 m) passes through loose rock and was driven by excavators. To provide advance support, the innovative AT - Pipe Umbrella System with 139 [mm] squeezed connection developed by DSI Underground was successfully used in the loose rock sections of the Pflaurenz Tunnel to quickly and safely connect the tubes when driving the tunnel. (photo DSI Underground) Zur Entlastung der Gemeinde St. Lorenzen in Südtirol wird der ca. 1 km lange Tunnel Pflaurenz als Ortsumfahrung errichtet. Die Hälfte des Tunnels liegt im Lockergestein (ca. 417 m) und wurde im Baggervortrieb aufgefahren. Als vorauseilendes Stützmittel wurde in den Lockergesteinsabschnitten des Tunnel Pflaurenz das von DSI Underground entwickelte innovative AT - Rohrschirmsystem mit Pressverbindung zur schnellen und sicheren Verbindung der Hüllrohre bei der Auffahrung des Tunnels eingesetzt. (Foto: DSI Underground)
Source:	Geomechanics and Tunnelling 14 (2021), No. 1
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Language of Publication:	English/German

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