Pavement failures caused by substructure cavities, or voids, have recently become a widespread problem in Japanese roads. Several cities in Japan have reported these problems. To ensure the safe flow of traffic and to avoid pavement failure-induced traffic accidents, the detection of sinkholes became a top priority. Acting on this situation, the Ministry of Construction developed a sinkhole detection vehicle that makes it possible to detect subsurface cavities with higher speed and precision. The Ministry of Construction formed a coordinating agency to oversee the implementation of this technology. This agency made actual site surveys and analyzed the results to ascertain the mechanical properties of subsurface cavities. With this knowledge, in 1992 an effective sinkhole detection method was developed. The method utilizes ground penetrating radar and a borehole camera as field data acquisition tools. The detection method relies on using the analysis tools to provide an increasingly detailed look at the pavement substructure: from a general survey to a specific survey. Through many void identifications during daily operations in the field, we have arrived at an understanding of the nature of subsurface voids. This understanding has allowed pavement maintenance and construction engineers to catch voids before they evolve to dangerous pavement failures.


  • English

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 9-16
  • Monograph Title: Pavement monitoring and evaluation issues
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00715551
  • Record Type: Publication
  • ISBN: 0309061660
  • Files: TRIS, TRB
  • Created Date: Jan 4 1996 12:00AM