Applicability of Radar Subsurface Profiling in Estimating Sidewalk Undermining

Report No: 79-R44

Published in 1979

About the report:

An evaluation was made of the applicability of the geophysical technique of radar subsurface profiling to estimating the extent of sidewalk undermining. It was found that there is a distinct difference between the observed radar echo patterns of a non-undermined sidewalk and those from an undermined sidewalk. Therefore, it is feasible to determine from the radar scan of a sidewalk the length of the sidewalk that is undermined. It is also feasible to determine the approximate depth of voids underneath an undermined sidewalk; however, this may sometimes be difficult to achieve. The approximate cost of surveying a sidewalk with the technique was also estimated.

Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.


  • G. G. Clemeña, Kenneth H. McGhee

Last updated: January 26, 2024

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