Geomechanics & Tunnelling 03/2018

For the extension of the Metro T Third Line in San Francisco, 2.7 km of tunnels and four new stations will be built. At the Chinatown Station, a cross-cut cavern was excavated by the side drift method. A 27 m long AT–139 pipe umbrella was used to secure the crosscut and the two side drifts. (Photo: DSI Underground)

• 25 years research and development at Graz University of Technology
• Short-term prediction of shotcrete utilization 
• Hybrid methods for shotcrete and segmental linings 
• Detection of voids in the annular gap using ground penetrating radar 
• Fibre-optic supported measurement methods for monitoring rock pressure
• Current research work at Montanuniversitaet Leoben
• Current research by ÖBB Infrastruktur AG on scale monitoring
• Storage sites for tunnel excavation material

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