High-Speed Nondestructive Testing Methods for Mapping Voids, Debonding, Delaminations, Moisture, and Other Defects Behind or Within Tunnel Linings

Periodic inspection of highway tunnels to assess changes in structural condition over time is critical to timely detection and remediation of problems to ensure road user safety. Tunnel structural problems that are considered widespread and potentially serious are tunnel leaks, concrete cracking, concrete spalling, concrete delamination, debonding, steel corrosion, and improper drainage. Monitoring of tunnel condition and deterioration rate is key to determining the appropriate schedule of maintenance and/or rehabilitation activities to remedy structural and safety problems that might lead to accelerated deterioration and sudden tunnel failures that could cause serious injury and even fatalities. Tunnel inspection is a challenging problem. Tunnels typically service high volume traffic and operate in aggressive environments. Keeping tunnels open during inspection and minimizing tunnel closures and user delays must be carefully balanced with the need to conduct detailed inspections to ensure the safety of drivers. Consequently, nondestructive test methods that are automated, quantitative, and rapid, and that provide complete coverage compared to conventional visual inspections need to be identified and evaluated. However, there does not appear to be any high-speed nondestructive (NDT) testing method for assessing the condition of tunnel linings that would minimize the disruption of ongoing traffic.


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  • Status: Completed
  • Funding: $1650000.00
  • Contract Numbers:

    Project R06(G)

  • Sponsor Organizations:

    Strategic Highway Research Program 2

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC    20001
  • Project Managers:

    Starnes, Monica

  • Performing Organizations:

    Texas A&M Transportation Institute

    Texas A&M University System
    3135 TAMU
    College Station, TX  United States  77843-3135
  • Principal Investigators:

    Wimsatt, Andrew

  • Start Date: 20090908
  • Expected Completion Date: 0
  • Actual Completion Date: 20130131
  • Source Data: RiP Project 21382

Subject/Index Terms

Filing Info

  • Accession Number: 01464246
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project R06(G)
  • Files: TRB, RiP
  • Created Date: Jan 3 2013 2:39PM