Geophysical properties of soils

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Low energy perturbations used in geophysical methods provide insightful information about constant-fabric soil properties and their spatial variability. There are causal links between soil type, index properties, elastic wave velocity, electromagnetic wave parameters and thermal properties. Soil type relates to the stress-dependent S-wave velocity, thermal and electrical conductivity and permittivity. The small strain stiffness reflects the state of stress, the extent of diagenetic cementation and/or freezing. Pore fluid chemistry, fluid phase and changes in either fluid chemistry or phase manifest through electromagnetic measurements. The volumetric water content measured with electromagnetic techniques is the best predictor of porosity if the water saturation is 100%. Changes in water saturation alter the P-wave velocity when Sr→100%, the S-wave velocity at intermediate saturations, and the thermal conductivity when the saturation is low Sr→0%. Finally, tabulated values suffice to estimate heat capacity and latent heat for engineering design, however thermal conductivity requires measurements under proper field conditions.

Original languageEnglish (US)
Title of host publicationProceedings of the 5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016
EditorsHugo E. Acosta-Martinez, Barry M. Lehane, Richard Kelly
PublisherAustralian Geomechanics Society
Pages135-144
Number of pages10
ISBN (Electronic)9780994626110
StatePublished - Jan 1 2016
Event5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016 - Gold Coast, Australia
Duration: Sep 5 2016Sep 9 2016

Publication series

NameProceedings of the 5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016
Volume1

Conference

Conference5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016
CountryAustralia
CityGold Coast
Period09/5/1609/9/16

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geophysics
  • Soil Science

Fingerprint

Dive into the research topics of 'Geophysical properties of soils'. Together they form a unique fingerprint.

Cite this