DETERMINING LANDSLIDE POTENTIAL WITH THE HELP OF ELECTRO MAGNETIC FIELD STRENGTH ESTIMATION: PROVING OF THE METHOD

SKREDRISKBEDOMNINGAR MED HJALP AV ELEKTROMAGNETICK FALTSTYRKEMATNING-PROVNING AV NY METOD

It is recognized that the electromagnetic field strength measurements (EMF-measurement) is a useful method for the location of discontinuities within possible landslide areas. The method involves an investigation of changes of the electromagnetic waves-anomaly in field strength--after passage through the strata. The anomalies indicate electric and magnetic inhomogeneities and discontinuities in the strata. This study attempts to further develop the EMF-measurement method. The study first attempts to determine if variation in the strength of the electric field can give significant information about water-bearing layers or zones (layers on zones with greater dielectic constant in relation to the surroundings) where the geotechnical properties of the day can undergo changes through leaching and infiltration. The wave propagation theory is discussed, and details of the study are given. Two different types of anomalies appeared from the EMF-curves: amplitude variations (local variations); and absolute variations between different parts of one and the same investigation area (regional anomalies). The results of the study are discussed and conclusions are drawn.

  • Availability:
  • Corporate Authors:

    Transport and Road Research Laboratory (TRRL)

    Wokingham, Berkshire  United Kingdom 

    Swedish Geotechnical Institute

    Fack
    S-581 01 Linkoping 1,   Sweden 
  • Authors:
    • Inganas, J
  • Publication Date: 1978

Language

  • Swedish

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00194191
  • Record Type: Publication
  • Report/Paper Numbers: Lab. Report LR853
  • Files: TRIS
  • Created Date: Jun 30 1979 12:00AM