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Defect Waviness 
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About The Spreadsheet

This spreadsheet has been developed by PSM to assess the geometry of defect waviness from borehole televiewer data. The method is used to estimate the dilation angle, wavelength and amplitude of folding in the direction of sliding risk. The calculation of down-dip wavelength is critical for assessing the applicability of the adopted dilation angle to the scale of the slope and failure mechanism in question. The adoption of friction angles that include a waviness contribution to the defect shear strength allows for implementation of steeper slope angles in structurally controlled slopes.

Instructions for use are provided within the spreadsheet. For more information on the methodology and theory behind the calculations, see Noble (2024).

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    Locations

    Sydney

    G3, 56 Delhi Road
    North Ryde NSW 2113

    BRISBANE

    Level 6, 500 Queen St
    Brisbane QLD 4000

    PERTH

    Level 3, 22 Delhi St
    West Perth WA 6005

    Geelong

    O16, L4, 60 Moorabool St
    Geelong VIC 3220
    Contact us
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