Contemporary Architecture Civil Engineering Modern Building Skyscraper Glass Building

Seismic Surveying

Initially developed for use in the oil industry, Seismic Surveying, and its myriad of techniques (such as Seismic Refraction and MASW), is now considered a valuable tool for non-destructively assessing the structure and competence of subsurface soils and rock.


Big benefits

Seismic surveying is particularly beneficial when used for the following purposes:

  • Mapping of soil thickness overlying bedrock along linear routes such as road corridors, new cable routes and pipelines.
  • Determining soil and rock in-situ stiffness characteristics via the calculation of moduli of elasticity.
  • Mapping subsurface rock quality using compressional "p" wave velocity analysis to yield rock rip ability
  • Mapping subsurface soil and rock strength using shear "s" wave velocity analysis.  The resulting data can be converted to provide a 2D profile (like that below) represented as Standard Penetration test "N" values
  • In marine environments seismic reflection is used to profile sub seabed sediments to identify layer boundaries and aid identification of sediment types. (E.g. Sub surface "Boomer" and "Pinger" surveys / CHIRP surveys)
  • Extrapolating rock and soil interfaces between exploratory holes
  • Providing preliminary information with respect to rip ability along new cable and pipeline routes.
  • Provision of accurate soil and rock stiffness data typical for a site and not reliant on recovery of intact rock cores or expensive Geobore "S" soil cores


Seismic Refraction Survey Profiles