Nondestructive Evaluation Of Concrete Linings At Hanging Lake Tunnel
Tunnel lining evaluation is performed in the Hanging Lake Tunnel near Glenwood Springs, Colorado, using variations of four nondestructive evaluation (NDE) methods: air- and ground-coupled ground penetrating radar (GPR), ultrasonic echo (US echo), ultrasonic tomography (UST), and impact echo (IE). Potential regions of interest are identified using high-speed air-coupled GPR and visual inspection. A robotic frame with pneumatically-operated vacuum plates was used to automate the ground-coupled GPR, US echo, and IE tests, while the UST technique was used manually. This study shows that a particular combination of NDE techniques is a powerful tool for assessing the condition of tunnel linings and can detect potential anomalies such as delamination, depth of surface cracks, reinforcement depth and layout, and lining thickness. By mapping the phase shift of the ultrasonic pulses at detected interface, the potential bonding of layer interfaces and reinforcement is assessed.
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Supplemental Notes:
- This paper was sponsored by TRB committee AFF60 Tunnels and Underground Structures.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- White, Joshua
- Wolf, Julia
- Shokouhi, Parisa
- Hurlebaus, Stefan
- Wimsatt, Andrew
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Conference:
- Transportation Research Board 92nd Annual Meeting
- Location: Washington DC, United States
- Date: 2013-1-13 to 2013-1-17
- Date: 2013
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; Photos; References;
- Pagination: 16p
- Monograph Title: TRB 92nd Annual Meeting Compendium of Papers
Subject/Index Terms
- TRT Terms: Cracking; Delamination; Ground penetrating radar; Inspection; Nondestructive tests; Tunnel lining; Tunnels; Ultrasonic tests
- Candidate Terms: Impact echo tests
- Geographic Terms: Colorado
- Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation; I25: Design of Tunnels; I61: Equipment and Maintenance Methods;
Filing Info
- Accession Number: 01473474
- Record Type: Publication
- Report/Paper Numbers: 13-3362
- Files: TRIS, TRB, ATRI
- Created Date: Feb 22 2013 10:29AM