Oregon Department of Transportation s Tunnel Management and Rehabilitation Program
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1 Oregon Department of Transportation s Tunnel Management and Rehabilitation Program Jamie Schick, C.E.G. Jacobs Associates, Bryan Duevel, P.E., G.E., Jacobs Associates and Jeff Swanstrom, P.E., ODOT 4/26/2013
2 Introduction Review of ODOT Tunnels ODOT Tunnel Committee Tunnel Inspection Program Tunnel Scanning Salt Creek Tunnel Rehabilitation Elk Creek Tunnel Liner
3 ODOT Tunnel System Arch Cape Dennis Edwards Tooth Rock Mosier Vista Ridge Oneonta Cape Creek Knowles Creek Elkton Salt Creek Insert Map Here
4 ODOT Tunnel System 700 to 1400 feet long (one exception) Timber-lined rehabilitated to concrete-lined Constructed in 1930s to 1950s Exceptions Oneonta Tunnel (1914) and Mosier Tunnel (1917) Newest Vista Ridge Tunnel (1969)
5 ODOT Tunnel HQ Committee Formed in 2007 to provide support to Regions Maintains existing tunnel maps & Records Manages tunnel inspections Oversee tunnel scanning program Limited tunnel repair funding
6 Tunnel Inspection Program Original detailed Inspections 2000 Response to fatality in Dennis Edwards Tunnel Annual Inspections Detailed Inspection Program Completed - Elk Creek Tunnel in 2011 and Salt Creek Tunnel in 2011 Scheduled - Tooth Rock and Cape Creek Tunnels
7 Tunnel Inspection Program Annual inspections by bridge inspectors Short duration Major defect changes Visual inspection Indications of progressive failure
8 Tunnel Inspection Program Detailed Inspections Completed by tunnel consultant Review construction records and drawings Multi-day inspection, including portal areas Detailed inspection of cracks, crack patterns and defects Update tunnel maps in Microstation Provide Regions with repair and inspection recommendations
9 Tunnel Maps
10 Tunnel Scanning Program Initiated in 2010 Scanned 5 tunnels Ground-based LiDAR using a Leica Scan Station C103D Laser Scanner Accurate to 0.02 feet at 160 feet away.
11 Tunnel Scanning Program Benefits Baseline for comparison Accuracy sufficient for design purposes Unexpected Uses
12 Tunnel Scanning Program Arch Cape Scanning Comparison
13 Tunnel Scanning Program Arch Cape Portal Wall Comparison
14 Tunnel Scanning Program Tooth Rock Ferry Transport
15 Tunnel Scanning Program
16 Salt Creek Tunnel Inspection & Rehabilitation
17 Salt Creek Tunnel Inspection Baseline conditions prior to rehabilitation Assess fire damage Identify areas for crack sealing Provide recommendations for additional repairs to be integrated into design
18 Salt Creek Tunnel Inspection Severe Defects Rockfall Hazards
19 Salt Creek Tunnel Inspection July 2011 Fire Damage
20 Salt Creek Tunnel Inspection ANDESITE Portal Spalling BASALT
21 Elk Creek Tunnel Inspection & Liner Improvements
22 Elk Creek Tunnel Rehabilitation Unlined Section Lined Section CONTACT
23 Elk Creek Tunnel Rehabilitation Shotcrete Lining Cores CONTACT
24 Elk Creek Tunnel Rehabilitation Resin Grouted Dowels
25 Elk Creek Tunnel Rehabilitation Incorporate LiDAR into Design
26 Tunnel Defect Criteria
27 Tunnel Defect Criteria Inspections completed based on FHWA criteria Must consider potential exposure of public to tunnel hazards Other industries (water, hydro, rail, etc) prioritize defects considering lining integrity
28 Tunnel Defect Criteria Example: Spalling FHWA Severe Spall - More than 25 mm (1 in.) deep and greater than 150 mm (6 in.) in diameter and any spall in which reinforcing steel is exposed. Non-highway Severe Spall Full penetration of the liner exposing soil / rock behind liner.
29 Tunnel Defect Criteria Non-highway Defect Criteria
30 Tunnel Defect Criteria Oblique Cracking w/offset
31 Tunnel Defect Criteria Sidewall Deterioration
32 Tunnel Defect Criteria Sidewall Deterioration
33 Tunnel Defect Criteria Lining Deformation
34 Tunnel Defect Criteria Lining Deformation
35 Questions?
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