Installation of Thermistor Strings in Test Borings: A Comparison of Methods and Results

by Carol A. Klein, DOWL Engineers, Anchorage, AK, USA,
Charles R. Wilson, DOWL Engineers, Anchorage, AK, USA,
Brian D. Benson, DOWL Engineers, Anchorage, AK, USA,
Gregory W. Carpenter, DOWL Engineers, Anchorage, AK, USA,

Document Type: Proceeding Paper

Part of: Cold Regions Engineering


Several test borings were instrumented with two thermistor strings, one inside and one outside an air-filled PVC casing to compare readings of both thermistor strings and the stability of the readings with time. The inner string generally provided stable readings within an hour after installation. Over a six-week period, no significant difference was found in the inside versus outside measurements.

Subject Headings: Boring | Comparative studies | Temperature measurement | Frozen soils | Soil stabilization | Polymer | Soil tests | Instrumentation

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