Improving Electric Grounding in Frozen Materials.

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 w...

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Bibliographic Details
Main Authors: Delaney,A J, Sellmann,P V, Arcone,S A
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1982
Subjects:
Snow
Ice and Permafrost
Electrical and Electronic Equipment
Electricity and Magnetism
*Electrical grounding
*Electrical conductivity
*Electrodes
*Permafrost
Electrical resistance
Silt
Fine grained materials
Buried objects
Holes(Openings)
Earth fills
Salts
Water
Detonations
Shaped charges
Permeability
PE62730A
AST42
WU011
Fairbanks
Ice
permafrost
Alaska
Online Access:http://www.dtic.mil/docs/citations/ADA117873
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA117873
Description
Summary: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)

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