68th Canadian Geotechnical Conference and 7th Canadian Permafrost Conference

INSTRUMENTING AND MONITORING A SLOW MOVING LANDSLIDE

Session: Landslides and Slope Stability V / Mouvements de terrain et stabilité des pentes V

Matthew Schafer, University of Alberta (Canada)
Renato Macciotta, University of Alberta (Canada)
Michael Hendry, University of Alberta (Canada)
Derek Martin, University of Alberta (Canada)
Chris Bunce, Canadian Pacific Railway (Canada)
Eddie Choi, Canadian Pacific Railway (Canada)
Tom Edwards, Canadian National Railway (Canada)

The performance of instrumentation in moving landslides has always been a challenge in the geotechnical industry. Movements can cause issues relating to shearing of cables or the breaking of grout used for installation. The Ripley Landslide near Ashcroft, B.C., Canada has been previously investigated using sand-pack piezometers and slope inclinometers. An investigation and monitoring program was carried out in April 2013. Grouted-in piezometers and a Shape Accel Array was installed during this investigation. The river elevations were derived from a rating curve. Pore pressures were compensated for the effect of barometric variation. The displacement and pore pressure values were validated to ensure that the values recorded could be used for further analysis.