Rock mass characterization for tunnels in the Copenhagen limestone

Niels Nielsen Foged, Lisa Jakobsen, Peter Jackson, Lars Erichsen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Tunnels in Copenhagen are drilled through highly anisotropic limestone comprising alternating strongly lithified and less lithified parts. The mass quality of the limestone is usually defined from fracture spacing registered in core samples. The deposit is, however, affected destructively by drilling activity yielding a low Rock Quality Designation RQD. In-situ observations of the limestone in excavations or televiewer logs reveal only few natural discontinuities compared to core logging, indicating a very good suitability for tunneling.
Original languageEnglish
Title of host publication11th Congress of the International Society for Rock Mechanics
Volume2
PublisherTaylor & Francis Group
Publication date2007
Pages1025-1030
ISBN (Print)978-0-415-45084-3
Publication statusPublished - 2007
Event11th Congress of the International Society for Rock Mechanics - Lisbon, Portugal
Duration: 9 Jul 200713 Jul 2007
http://www.isrm.net/gca/index.php?id=876

Conference

Conference11th Congress of the International Society for Rock Mechanics
CountryPortugal
CityLisbon
Period09/07/200713/07/2007
Internet address

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