APPLICATION OF REMOTE SENSING IN THE QUICK CLAY RESEARCH

A remote sensing method has been worked out by which it is possible to trace areas with abnormally high dielectric properties, differing from the surrounding terrain. The method utilizes electro-magnetic waves with a frequency of about 100 MHz. In most cases the dielectric anomalies are due to superficial water arteries. With the remote sensing results as an exploratory basis, the studies are supplemented with different types of geotechnical investigations including salt soundings. It was found that quick clays with a high rapidity number sometimes occur in areas with the above mentioned ground water conditions. These areas usually have an infiltration zone allowing surface water to spread into lower lying sediments in the formation. The deposits seem to have a connection with infiltration of waste water containing e.g. phosphates. No deposits of so called high rapid quick clays of natural origin have been found. Sewage systems passing through such infiltration zones are rather common in Sweden. It is stated in the report that there is a potential danger if the systems leak, especially when the water infiltrates unstable slopes. A recent slide connected with a failure of a sewer pressure-tube is described. Further, the investigation has shown that in an apparently homogeneous marine sediment with a high salt content, streaks can exist with almost salt-free clay deposits sometimes containing quick clay. The possibility of chemical stabilisation of certain types of sediments is also discussed.

• Corporate Authors:

  Swedish Geotechnical Institute

  Banergaten 16
  S-115-26 Stockholm,   Sweden 

  Swedish Geotechnical Institute

  Banergaten 16
  S-115-26 Stockholm,   Sweden 
• Authors:
  • Soderblom, R
• Publication Date: 1974

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 57 p.
• Serial:
  • Swedish Geotechnical Inst Reprints & Prelim Repts
  • Issue Number: 55

Subject/Index Terms

• TRT Terms: Dielectric materials; Electromagnetic waves; Groundwater; Infiltration; Remote sensing; Salts; Sensitive clays; Wastewater; Water areas
• Uncontrolled Terms: Surface waters
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00082916
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 8 1975 12:00AM