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Proceedings Paper

Infrared Thermal Sensing Of Sewer Voids
Author(s): Gary J Weil
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Paper Abstract

The deterioration of sewer systems and their associated infrastructure is one of the most serious problems facing city, state, federal, and world authorities. As an example, three large sewer voids in the St. Louis Metropolitan area caused over $2,000,000 in repair costs in only one year. The detection of voids in and around underground sewer lines, as well as the detection of effluent leakages is necessary when determining the priority of structures for repair. At the present time sewer voids are sometimes detected by manual methods which are expensive, time consuming, and not extremely accurate. Most of the time, the void is not detected until the street caves in. Infrared thermography has been found to be capable of detecting voids around underground sewer systems because under certain conditions, temperature differentials exist between various types of materials, effluents, and cavities. This paper describes the problem of deteriorating sewer systems, the field tests used to detect sewer voids, the equipment used in the field tests, the theories used to design the tests, various complicating factors, and anticipated future refinements on the procedure.

Paper Details

Date Published: 27 March 1984
PDF: 6 pages
Proc. SPIE 0446, Thermosense VI: Thermal Infrared Sensing for Diagnostics and Control, (27 March 1984); doi: 10.1117/12.939150
Show Author Affiliations
Gary J Weil, EnTech Engineering Consultants (United States)


Published in SPIE Proceedings Vol. 0446:
Thermosense VI: Thermal Infrared Sensing for Diagnostics and Control
Gordon J. Burrer, Editor(s)

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