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List of products by author: H. Egger
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Key machine parameters for classification of rock mass in TBM excavation in BBT
Abstract: The Exploratory Tunnel of BBT is excavated ahead of the two equal main tunnels and with a smaller diameter as compared to them, in order to investigate the conditions of the rock mass and its response to the excavation, thus allowing the execution of construction works with a reasonable optimization of risks. The study analyses the section located before the construction stoppage that took...
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The importance of prospection beyond the tunnel face: impacts on excavation speed and benefits
Abstract: In deep tunnels with high overburdens, geological predictions are usually not very reliable. The geological and hydrogeological risk of unexpected events caused by dangerous rock mass reactions remains high. Reducing such risks to a minimum during excavation is a must. For this reason, when excavating both with explosives and with a TBM, prospection measures beyond the rock face should be part...
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