Voids occurring under paved areas and beneath the ground surface at Naval and other Government installations lead to serious and costly problems. Available methods for detecting such voids nondestructively were evaluated so that timely repairs could be made and growth of the voids prevented. There is no one method capable of accurately locating and defining voids under all circumstances. However, either one or a combination of these three methods appear to be the most promising: (a) earth resistivity, (b) seismic techniques, and (c) subsurface radar. The effectiveness of these methods in detecting voids depends on soil properties, surface material properties (e.g., type of pavement), ground surface geometry, and accessibility with respect to the detecting equipment. Field investigations using the above three methods are recommended to provide quantitative evaluations of accuracy, reliability, and cost under various site conditions. Based upon the results of these field investigations, development of advanced acoustic holographic methods may be warranted. (Author)

  • Corporate Authors:

    Naval Civil Engineering Laboratory

    Port Hueneme California 93041
    ,   United States 
  • Authors:
    • Hironaka, M C
    • Hitchcock, R D
    • Forrest, J B
  • Publication Date: 1976-8

Media Info

  • Pagination: 42 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00145715
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: CEL-TN-1449 Final Rpt.
  • Files: TRIS
  • Created Date: Jan 16 1977 12:00AM