Engineers Australia

Geosurveys innovation

Dr Andi Pfaffhuber

The presentation will use a range of case studies to illustrate how geophysical methods are being used innovatively to deliver geotechnical efficiency. The presentation illustrates:

  • How radar satellite data is used to track infrastructure- and slope settlement to millimetre resolutions. Illustrations include a hydro dam and an urban example,
  • How a multi-risk hazard assessment can be carried out along linear infrastructure,
  • How lidar can be applied in tunnelling to control and document rock properties, shotcrete and rock support,
  • How terrestrial photo/lidar/radar methods can be combined for geohazard assessment and urban infrastructure settlement,
  • How airborne geophysics can be used to:
    • Perform soil investigations for geotechnical design of surface infrastructure,
    • Find major weakness zones along tunnel alignments
    • Classify hazardous quick clay
    • Find the base of massive debris- and rock slides
  • How geophysical and geotechnical data combine to amplify the efficiency of ground investigations

About the speaker

Dr Andi PfaffhuberNGI

Andi has recently moved to Perth with two goals: to establish onshore geophysical activities at NGI’s Perth office and to spend a sabbatical time away from NGI’s main office in Oslo. As part of his sabbatical, he is spend a week at the Antarctic CRC in Hobart to work on publications related to his polar research past. Andi has been with NGI for ten years and built up a Geosurveys section that provides the missing link between high quality survey data and complex, real life geotechnical challenges. This link and mutual understanding is the core added value that Geosurveys’ assembled expertise and experience provide in consulting and research projects anchored in NGI’s building, construction, transportation and natural hazard market areas.

Representing NGI he has lead several projects using innovative technologies to map the earth’s surface and subsurface with respect to settlement, bedrock topography, weakness zones, slope stability and contaminated ground. This includes geophysical investigations, GIS and remote sensing.

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