By António Campos e Matos, Luís Ribeiro e Sousa, Johannes Kleberger, Paulo Lopes Pinto

Tunnels have a excessive measure of hazard that should be assessed and controlled. Underground works intersect and engage with typical fabrics, incorporating their features as structural parts in their personal balance. hence geotechnical threat analyses are carried out in any respect levels of tunnel development, from layout via to post-construction upkeep. research of geotechnical chance consists of a gaggle of reports which result in the identity and overview of the capability chance of blunders and the implications of its prevalence. This quantity considers building and protection, financing and keep watch over, and exploration and upkeep. Eminent experts speak about probability review and administration, established either on complicated theoretical innovations and on useful adventure. The publication is of curiosity to a variety of execs interested in making plans, development and administration of tunnels: marketers, designers, specialists and contractors.

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A probabilistic approach for characterizing the complex geological environment for the design of the new Metro do Porto”. Proceedings Congress ITA, Milan, pp. 463–470. 51 Geotechnical Risks in Rock Tunnels – Campos e Matos, Ribeiro e Sousa, Kleberger & Lopes Pinto (eds) © 2006 Taylor & Francis Group, London, ISBN 0 415 40005 8 Geotechnical risk management in tunnelling P. Schubert iC consulenten Ziviltechniker GesmbH, Bergheim, Austria ABSTRACT: Risk management in tunnelling is a continuous process from the alignment selection to the completion of the project.

It may have a significant environmental impact, due to the possible occurrence of accidents or important damage on the infrastructures on the surface or on the subsurface, as well as due to noise and vibration, especially during the construction process. Therefore, it becomes essential, from a point of view of design and planning, to develop rational methods aiming to minimize the associated hazard or damage (Sousa 1998; Burland et al. 2002). One of the important requirements is related with the assessment of the bearing capacity of buildings in the vicinity of the tunnel, since these structures are sensitive to settlements, to horizontal strains and to differential displacements.

2003. Particular failure mechanisms of weathered granite observed during construction of metro tunnels by TBM. ITA Congress on (Re)Claiming the Underground Space, Amsterdam: 497–503. Gysel, M. 2002. Anhydrite dissolution phenomena: Three case histories of anhydrite karst caused by water tunnel operation. Rock Mechanics and Rock Engineering, Vol. 35, no. 1: 1–21. Hansen, L. 1993. The significance of general and structural geology in Rock Engineering. ISRM Symposium EUROCK ‘93 on Safety and Environment Issues in Rock Engineering, Lisbon: 811–816.

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