Third Tunnelling Colloquium in Muenster

摘要

On May 7, the Muenster Tunnelling Colloquium took place at the Muenster University of Applied Sciences, chaired by Prof. Dietmar Maehner from the Institute for Underground Construction (IuB). Around 200 engineers, contractors, consultants, manufacturers and students attended the event. "The demand was great", organizer Prof. Maehner was pleased to say. The Colloquium dealt with topics like designing tunnel inner shells and lining with regard to planning, construction material technology and practical application. Quality assurance was a further significant parameter as e.g. in conjunction with non-destructive testing (RI-ZFP-TU), as well as a report on initial findings with the recipe and application of polypropylene (PP) fibres used for fire protection for the inner shell of the Buehl Tunnel at Siegen. Other papers dealt with applying engineering technology as for instance, driving technology in the Bossler Tunnel (7000/8450 m ofTBM excavation) on the new rail route from Stuttgart to Ulm, planning and executing drill+blast operations to drive tunnels (low-vibration and precise blasting, measurements inside and outside the tunnel) and the shield drive for the 4.27 km long Rastatt rail tunnel in conjunction with freezing zones given shallow overburden. Responses were also provided to questions relating to how to deal with face stability problems following cave-ins or blow-outs (for example the addition of fillers to the bentonite suspension, injecting self-setting artificial soils, sprayable membranes).