1887

Abstract

Summary

An AEM survey has been carried out supporting a highway construction project in Norway in order to obtain information about possible sensitive clay (leached marine clay, also called quick clay). In addition, an ERT profile was acquired along a flight line in an area where geotechnical boreholes indicate a layer of sensitive clay. AEM and ERT data agree very well, indicating only small changes in electrical resistivity throughout the sediment layer. The AEM data show more structures than ERT, demonstrating that resolution and accuracy of AEM are high enough to resolve subtle changes in resistivity charecterizing different clay units. Based on our results, AEM can be used to target zones of possible sensitive clay which can subsequently be investigated in more detail through geotechnical analyses like boreholes and sampling. Thus, using AEM to design the geotechnical program has the potential to provide significant cost reductions for similar projects.

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/content/papers/10.3997/2214-4609.201413863
2015-09-06
2024-04-26
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References

  1. Anschütz, H., Christensen, C. and Pfaffhuber, A.A.
    [2014] Quantitative Depth to Bedrock Extraction from AEM Data. 20th European Meeting of Environmental and Engineering Geophysics, Athens, Greece, Tu Olym 01.
    [Google Scholar]
  2. Auken, E., Christiansen, A.V., Jacobsen, B.H., Foged, N. and Sørensen, K.I.
    [2005] Piecewise 1D laterally constrained inversion of resistivity data. Geophysical Prospecting, 53, 497–506.
    [Google Scholar]
  3. Christensen, C., Pfaffhuber, A.A., Anschütz, H. and Smaavik, T.F.
    [2015] Combining airborne electromagnetic and geotechnical data for automated depth to bedrock tracking. Submitted to Journal of Applied Geophysics.
    [Google Scholar]
  4. Donohue, S., Long, M., O’Connor, P., Eide, T.H., Pfaffhuber, A.A. and Romøen, M.
    [2012] Multi-method geophysical mapping of quick clay. Near Surface Geophysics, 10, 207–219.
    [Google Scholar]
  5. Rømoen, M., Pfaffhuber, A.A., Karlsrud, K. and Helle, TE.
    [2010] The use of a CPTU-probe wih resistivity module on marine sediments. CPT’10: 2nd International Symposium on Cone Penetration Testing, Huntington Beach, CA, USA.
    [Google Scholar]
  6. Solberg, I.L., Rønning, J.S., Dalsegg, El., Hansen, L., Rokoengen, K. and Sandven, R.
    [2008] Resisitivity measurements as a tool for outlining quick-clay extents and valley-fill stratigraphy: a feasibility study from Buvika, Central Norway. Canadian Geotechnical Journal, 45, 210–255.
    [Google Scholar]
  7. Sørensen, K.I. and Auken, E.
    [2004] SkyTEM - A new high-resolution helicopter transient electromagnetic system. Exploration Geophysics, 35, 191–199.
    [Google Scholar]
  8. Viezzoli, A., Christiansen, A.V., Auken, E. and Sørensen, K.I.
    [2008] Quasi-3D - modeling of airborne TEM data by Spatially Constrained Inversion. Geophysics, 73, F105–F113.
    [Google Scholar]
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