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List of products by author: A. Bruland
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Applicability of the new rock abrasivity test method (RIAT) to cutter life assessments in hard rock tunnel...
Abstract: Disc cutter consumption is of great importance when using the Tunnel Boring Machine (TBM) method for tunnelling in hard rock conditions. Abrasive wear is the most common process affecting cutter consumption; therefore good laboratory tests for rock abrasivity assessments are needed to carry out reliable cutter consumption assessments that enable project planning and control of the risk. A new...
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Comparison of tunnel excavation cycle time for Norwegian and Korean tunnels
Abstract: Tunnel construction cost and time in a drill & blast tunnel are quite different from country to coun- try since they have been developed considering geological conditions, social regulations and eco- nomic situations of each country, although the design concept and general procedures of opera- tions are practically the same worldwide. Thus, every country has been trying to reduce construction...
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Tailor-made TBM design for boring in extreme hard rock conditions and examples from the Follo Line tunnel project
Abstract: There are quite a few examples of TBM projects that have suffered low progress and high cost due to improper design of TBM and cutters. Dealing with massive, homogeneous, abrasive and extreme hard rock with UCS in the range of 100-300 MPa, will demand a specific design of TBM and cutters. In Norway, such hard rock conditions are common and the experiences gained from TBM boring of tunnels since...
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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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