Geotechnical Engineering

Geotechinal Engineering

The application of airborne geophysics to provide solutions for engineering problems is increasing quickly. The SkyTEM method delivers accurate, high resolution, precisely positioned measurements giving scientists and engineers a better understanding of geology, hydrology, and natural and manmade hazards. SkyTEM projects include pre-construction engineering for pipelines, tunnels, harbours, mine site infrastructure, slope stability studies, overburden thickness determination, identification of fractures and faults and location of aggregate deposits and water resources.

SkyTEM is of high value to engineers as it provides a multi-sensor platform that collects various types of data concurrently, including:

  • Electromagnetics – from near surface to depth and configurable for various geological settings, targets, depths and data requirements
  • Magnetics – for mapping magnetic anomalies, fractures & faulting and man-made buried metallic objects
  • GRS – measurement of radio-elements and detection of dangerous materials
  • GPS – for positional accuracy
  • Laser Altimeter- for accuracy in processing and delivery of digital elevation models
  • Video Camera – for a record and review of ground features

Various types of data presentations and final products are available including inversions and 3D products.

Time is money and helicopter-borne surveys are an effective means of reducing the time and cost associated with gaining land access and permission for drilling. Integrated with ground-based measurements and a drilling program, airborne EM conductivity results provide a more complete understanding of ground characteristics.

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Publications

SkyTEM for Geotechnical Engineering

A new road segment is being planned northeast of Norway's Capital city, Oslo. In this context, knowledge of sediment thickness is vital, as is information about occurrence and extent of highly sensitive marine clay (so-called quick clay).