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List of products by author: P. D. Jakobsen
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Lessons learned from open pit blast fumes causing near-fatal accident in a closed underground drift
Abstract: Subsequent a quarry blast, at Franzefoss Pukk - section Vassfjell in May 2016, carbon monoxide gas migrated through a 40 m shaft, into a tunnel facility for aggregate production. A TV team from the Norwegian Broadcaster NRK together with employees in Franzefoss Pukk was present in the tunnel during the gas migration. The involved persons got various symptoms from the gas involving sickness,...
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Operation and Maintenance Costs of Subsea Road Tunnels in Norway
Abstract: In Norway, there are currently more than 30 subsea road tunnels in operation. The Vardø Tunnel was the first one, finalized in 1983. In general, road tunnels require rock support for its stabilization along with other materials, equipment, consumptions and activities that affect the cost during their Operation and Maintenance (O&M). These resources aim to fulfil requirements related to...
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Pre-investigations for TBM tunnelling
Abstract: Tunnelling with tunnel boring machines (TBM) has become the selected excavation method for some infrastructure and hydropower projects in Norway the last years. Planning and preinvestigation of ground conditions is known to be costlier and more demandable for TBM tunnelling than for conventional drill and blast (D&B) tunnelling, which is the most commonly used excavation method in Norway. This...
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The NTNU Prediction Model: A Tool for Planning and Risk Management in Hard Rock TBM Tunnelling
Abstract: In the tunnelling industry, the prediction of TBM performance and costs is an important issue for planning and risk management at the design stages. The NTNU prediction model is an objective tool that has been used by several parties in the tunnelling industry. The model can be used for estimating the excavation rate and costs, as well as planning and risk assessment of hard rock TBMs projects....
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Tunnelling experiences on using conveyor belt for mucking at the world-longest and deepest subsea road tunnel
Abstract: The Solbakk twin tube tunnel is currently the longest and deepest subsea road tunnel under excavation. The tunnel is excavated from Strand, and from Hundvåg, north of Stavanger, with a total length of 14.3 km and a maximum depth of 292 m. Marti IAV Solbakk DA has the 7.9 km tunnelling contract from Strand towards Stavanger. The excavation method is conventional drill and blast, with use of...
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