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
    Conference number: 11
    http://www.isrm.net/gca/index.php?id=876

    Conference

    Conference11th Congress of the International Society for Rock Mechanics
    Number11
    Country/TerritoryPortugal
    CityLisbon
    Period09/07/200713/07/2007
    Internet address

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