Defect Waviness
Calculator
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).
