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List of products by author: E. Grasbakken
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Geological monitoring of Follo Line TBM project in Norway
Abstract: The Follo Line project is the first TBM excavation using double shield machines in Norway. The compensation format is based upon the NTNU-model and variations in geology are related to the fracturing factor, K, CLI, and quartz content. Double shield TBMs give very limited access to the rock mass, but with compensation directly linked to rock mass fracturing, mapping in the tunnel is important....
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Stability analysis of blocks formed with determined joint network – a case study of assembly chambers with...
Abstract: This paper presents the challenges of designing two assembly chambers in the Follo Line Project, EPC TBM. The chambers are required for the assembly works of the four tunnel boring machines, two machines in each chamber. These caverns are situated in hard gneiss with a depth from ground surface around 100 m in the North and 65 m in the South. The features of the assembly chambers indicate a...
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