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Tunnel boring machine collision with an ancient boulder beach during the excavation of the Barcelona city subway L10 line: a case of adverse geology and resulting engineering solutions

Author
Filbà, M.; Salvany, J.M.; Jubany, J.; Carrasco, L.
Type of activity
Journal article
Journal
Engineering geology
Date of publication
2016-01
Volume
200
First page
31
Last page
46
DOI
https://doi.org/10.1016/j.enggeo.2015.11.010 Open in new window
Repository
http://hdl.handle.net/2117/81637 Open in new window
URL
http://www.sciencedirect.com/science/article/pii/S0013795215300958 Open in new window
Abstract
The existence of a layer of hard boulders up to 1 m in size within the soft sediments of the Holocene Llobregat delta in the SW of Barcelona city caused the damage and stoppage of the EPB-type tunnel boring machine that excavated the subway L10 line. This layer constitutes a detrital deposit of exceptionally large grain size developed in the base of the delta. It originated as an alluvial fan in the northern margin of the delta during the last fall of the Mediterranean Sea level, at the end of t...
Citation
Filbà, M., Salvany, J.M., Jubany, J., Carrasco, L. Tunnel boring machine collision with an ancient boulder beach during the excavation of the Barcelona city subway L10 line: a case of adverse geology and resulting engineering solutions. "Engineering geology", Gener 2016, vol. 200, p. 31-46.
Keywords
Barcelona, Boulder beach, Holocene delta, Jet grouting, Subway L10 line, Tunnel boring machine

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