Strength and deformation properties of volcanic rocks in Iceland

Niels Nielsen Foged, Katrine Alling Andreassen

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    Tunnelling work and preinvestigations for road traces require knowledge of the strength and de-formation properties of the rock material involved. This paper presents results related to tunnel-ling for Icelandic water power plants and road tunnels from a number of regions in Iceland.
    The volcanic rock from Iceland has been the topic for rock mechanical studies carried out by Ice-landic guest students at the Department of Civil Engineering at the Technical University of Den-mark over a number of years in cooperation with University of Iceland, Vegagerðin (The Icelandic Road Directorate) and Landsvirkjun (The National Power Company of Iceland). These projects involve engineering geological properties of volcanic rock in Iceland, rock mechanical testing and parameter evaluation. Upscaling to rock mass properties and modelling using Q- or GSI-methods have been studied by the students and are available in their MSc-theses, but will not be covered here.
    The present contribution gives a short engineering geological overview of the volcanic rock for-mations in Iceland. Furthermore, the results of a number of unconfined, Brazilian, and a limited number of triaxial compression tests are presented and evaluated. The results are grouped accord-ing to engineering geological classification and classification properties such as bulk density. Correlations between the bulk density and the logarithm to the elasticity modulus and strength parameters are established and discussed.
    Original languageEnglish
    Title of host publicationProceedings of the 17th Nordic Geotechnical Meeting
    Number of pages10
    Publication date2016
    ISBN (Electronic) 978-9935-24-002-6
    Publication statusPublished - 2016
    EventThe 17th Nordic Geotechnical Meeting - Reykjavik, Iceland
    Duration: 25 May 201628 May 2016
    Conference number: 17


    ConferenceThe 17th Nordic Geotechnical Meeting
    Internet address


    • Volcanic rocks
    • Iceland
    • UCS test
    • Brazilian test
    • Elasticity modulus


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