Accession Number : ADA117873

Title :   Improving Electric Grounding in Frozen Materials.

Descriptive Note : Special rept.,


Personal Author(s) : Delaney,A J ; Sellmann,P V ; Arcone,S A

PDF Url : ADA117873

Report Date : Jun 1982

Pagination or Media Count : 16

Abstract : This study shows that resistance to ground of a simple vertical electrode in frozen fine-grained soil can be lowered significantly by placing it in a hole backfilled with a conductive soil-salt mixture. These tests were performed near Fairbanks, Alaska, in perennially frozen silt. Three electrodes were installed in holes created by detonating standard military shaped charges placed at the ground surface. The backfill contained varying amounts of salt. Measurement of resistance to ground of each electrode was made seasonally. The resistance to ground was lowered by an order of magnitude by the addition of a water-saturated salt-soil backfill. Improvement persisted six months after the backfill was placed and allowed to freeze. The degree of improvement provided by this technique will be a function of grain size and permeability of the surrounding soil. (Author)

Descriptors :   *Electrical grounding, *Electrical conductivity, *Electrodes, *Permafrost, Electrical resistance, Silt, Fine grained materials, Buried objects, Holes(Openings), Earth fills, Salts, Water, Detonations, Shaped charges, Permeability

Subject Categories : Snow, Ice and Permafrost
      Electrical and Electronic Equipment
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE