Browsing Norwegian Geotechnical Institute (NGI) Digital Archive by Author "Pfaffhuber, Andreas Aspmo"
Now showing items 1-11 of 11
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AEM in norway: A review of the coverage, applications and the state of technology
Harrison, Edward J.; Baranwal, Vikas Chand; Pfaffhuber, Andreas Aspmo; Christensen, Craig; Skudal, Guro H.; Rønning, Jan Steinar; Anschütz, Helgard; Brönner, Marco (Peer reviewed; Journal article, 2021) -
Combining airborne electromagnetic and geotechnical data for automated depth to bedrock tracking
Christensen, Craig; Pfaffhuber, Andreas Aspmo; Anschütz, Helgard; Smaavik, Tone Fallan (Journal article, 2015)Airborne electromagnetic (AEM) survey data was used to supplement geotechnical investigations for a highway construction project in Norway. Heterogeneous geology throughout the survey and consequent variable bedrock threshold ... -
Glacio-marine clay resistivity as a proxy for remoulded shear strength: correlations and limitations
Long, Michael; Pfaffhuber, Andreas Aspmo; Bazin, Sara; Kåsin, Kristoffer; Gylland, Anders Samstad; Montaflia, Alberto (Journal article; Peer reviewed, 2017)In geotechnical engineering in Norway, Sweden and Canada the presence of sensitive and/or quick clays poses a major challenge. Formation of these clays involves the leaching of salt from the pore fluid. Thus it has been ... -
In situ detection of sensitive clays – Part I: Selected test methods
Sandven, Rolf Birger; Gylland, Anders Samstad; Kåsin, Kristoffer; Pfaffhuber, Andreas Aspmo; Long, M. (Chapter, 2016)Sensitive and quick clays are typically found in Norway, Sweden and Canada, and are characterized by a remoulded undrained shear strength that is considerably lower than the undisturbed shear strength. In geotechnical ... -
In situ detection of sensitive clays – Part II: Results
Sandven, R.; Gylland, A.; Montafia, Alberto; Kåsin, Kristoffer; Pfaffhuber, Andreas Aspmo; Long, M. (Chapter, 2016)Sensitive and quick clays are typically found in Norway, Sweden and Canada, and are characterised by a remoulded undrained shear strength considerably lower than the undisturbed shear strength. In geotechnical engineering, ... -
Integrated bedrock model combining airborne geophysics and sparse drillings based on an artificial neural network
Lysdahl, Asgeir Olaf Kydland; Christensen, Craig; Pfaffhuber, Andreas Aspmo; Vöge, Malte; Andresen, Lars; Skudal, Guro H.; Panzner, Martin (Peer reviewed; Journal article, 2021)Cost overruns caused by unforeseen geological challenges are commonplace for large infrastructure projects. Thorough ground investigations can reduce this risk, but geotechnical drillings and laboratory test are expensive ... -
Not extinct yet: innovations in frequency domain HEM triggered by sea ice studies
Pfaffhuber, Andreas Aspmo; Hendricks, Stefan (Journal article, 2015)The last 15 years have brought major innovations in helicopter towed time domain electromagnetics (EM), while few further developments have been made within the classic frequency domain segment. Operational use of frequency ... -
Peatland Volume Mapping over Resistive Substrates with Airborne Electromagnetic Technology
Silvestri, Sonia; Christensen, Craig; Lysdahl, Asgeir Olaf Kydland; Anschütz, Helgard; Pfaffhuber, Andreas Aspmo; Viezzoli, Andrea (Peer reviewed; Journal article, 2019)Despite the importance of peatlands as carbon reservoirs, a reliable methodology for the detection of peat volumes at regional scale is still missing. In this study we explore for the first time the use of Airborne ... -
Resistivity and chargeability survey for tunnel investigation: a case study on toxic black shale in Norway
Bazin, Sara; Lysdahl, Asgeir Olaf Kydland; Viezzoli, Andrea; Gunther, T; Anschütz, Helgard; Scheibz, Jürgen; Pfaffhuber, Andreas Aspmo; Radic, T; Fjermestad, Halldis (Journal article; Peer reviewed, 2017)In the past few years, the focus on Alum shale hazards and the need for efficient mapping tools have increased in Norway. Alum shale is highly toxic and poses a substantial obstacle to infrastructure development such as ... -
Settlement monitoring using space-borne radar interferometry, in the context of large infrastructure projects
Frauenfelder, Regula; Vöge, Malte; Pfaffhuber, Andreas Aspmo; Hauser, Carsten; Dehli, Geir; Syversen, Fredrikke (Chapter, 2019)Geodetic data acquisition in urban areas and along linear infrastructure are major cost drivers in big infrastructure projects. Modern remote sensing methods help us to manage data acquisitions with high effectiveness ... -
Snow thickness profiling on Antarctic sea ice with GPR—Rapid and accurate measurements with the potential to upscale needles to a haystack
Pfaffhuber, Andreas Aspmo; Lieser, Jan L.; Haas, Christian (Peer reviewed; Journal article, 2017)Snow thickness on sea ice is a largely undersampled parameter yet of importance for the sea ice mass balance and for satellite-based sea ice thickness estimates and thus our general understanding of global ice volume change. ...