ROCK MASS ASSESSMENT FROM SEISMIC MEASUREMENTS . FIELD TESTING IN ENGINEERING GEOLOGY. PROCEEDINGS OF THE TWENTY-FOURTH ANNUAL CONFERENCE OF THE ENGINEERING GROUP OF THE GEOLOGICAL SOCIETY, SUNDERLAND POLYTECHNIC, SEPTEMBER 4-8 1988

An important part of many site investigations is the geomechanical assessment of the rock mass in terms of a classification system which is independent of the user. All classification systems used to date are based on observation of the rock mass and the determination of simple engineering parameters on intact rock specimens. In this paper, the use of the seismic properties of the rock mass to assess the geomechanical performance of the rock mass are examined and illustrated by three case histories. (The investigation of Altnabraec granite, Caithness, Middle chalk at Mundford, Norfolk, and Dalradian schists.) It is shown that precise values of uniaxial compressive strength cannot be predicted from compressional wave velocity determinations, although rock types can be classified qualitatively (for example, weak to very weak or strong to very strong). For a specific lithology, the compressional wave velocity can be related to the degree of fracturing and an approximate relationship with RQD (rock quality designation) established.(A) For the covering abstract of the conference see IRRD 832042.

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    GEOLOGICAL SOCIETY PUBLISHING HOUSE

    UNIT 7, BRASSMILL ENTERPRISE CENTRE, BRASSMILL LANE
    BATH,   United Kingdom  BA1 3JN
  • Authors:
    • MCCANN, D M
    • CULSHAW, M G
    • Northmore, K J
  • Publication Date: 1990

Language

  • English

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  • Accession Number: 00607157
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • ISBN: 0-903317-51-6
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1991 12:00AM