Inspection, Operation, and Rehabilitation Strategies for PennDOT Tunnels (P )
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1 Inspection, Operation, and Rehabilitation Strategies for PennDOT Tunnels (P )
2 Louis J. Ruzzi, P.E. District Bridge Engineer PENNDOT District 11-0 Pittsburgh T-20 Committee on Tunnels Jonathan D. McHugh, P.E. Senior Project Engineer/ Project Manager Pittsburgh Gannett Fleming, Inc.
3 Tunnel Operations/Maintenance, Rehabilitation Strategies & Inspection Methods Tunnel Fire in France Conduit Hanger Failure Liberty Tunnel Ceiling Collapse at Ft. Pitt Tunnels
4 Inspection, Operation, and Rehabilitation Strategies for PennDOT Tunnels I. Tunnel Overview Operations/Maintenance
5 PennDOT District 11-0 Tunnel System Consists of Four Tunnels: Ft. Pitt Tunnel (Built in 1960): 3614 Liberty Tunnels (Built in 1924): 5889 Squirrel Hill Tunnel (Built in 1953): 4225 Stowe Tunnel (Rebuilt 1940): 495 Total Roadway Length: 14,223 ft.
6 PennDOT District 11-0 Tunnel Maintenance/Operations Overview Typically each of our district s 3 main tunnels: Has a staff of 15 that works at the tunnel 24/7 Tunnels are washed every two weeks Mechanical system: fans are checked weekly and maintained weekly (auto greasers) Light bulbs are checked constantly. When 10% are out, a crew is scheduled to change the bulbs. Tow truck is on site to clear accidents Emergency systems are checked monthly and a yearly walk through is held with the City of Pittsburgh EMS. Open and Close HOV gates
7 PennDOT 11-0: General Highway/Bridge Funding Philosophy In the past, typically focused on capacity- adding projects Now, focus on bridges and some on tunnels, resurfacing projects for highways Over $100 M/Yr. needed for Bridge Rehabilitation/ Construction Limited Funding left over for tunnel needs
8 PennDOT 11-0: Historical Tunnel Funding Liberty Tunnel- Phase 1-1 $6.1 Million in 2008: Immediate Structural/Conduit Phase 2-2 $10 Million in 2009: Structural/Conduit Phase 3-3 $45 Million in 2010: Systems Upgrades & Remaining Rehab Squirrel Hill: $50 Million in : 2011: Structural Rehab/Life Safety Upgrades Prior to 2008 (Previous 32 years) we spent $33 million on tunnels: Liberty Tunnel- $12 million in $2 Million in structural repairs, $10 Million in 1996-replace roadway and barrier Ft. Pitt Tunnel- $20 Million in 2002)
9 PennDOT District 11-0: Rehabilitation Strategies
10 T-20 Manual for Design and Construction of Road Tunnels Vol. 1, Civil Elements
11 The European Tunnel Scan: 9 Recommendations for Design and Rehabilitation of Tunnels
12 The European Tunnel Scan: 9 Recommendations for Design and Rehabilitation of Tunnels Develop Universal, Consistent, and More Effective Visual, Audible, and Tactile Signs for Escape Routes Develop AASHTO Guidelines for Existing and New Tunnels Conduct Research and Develop Guidelines on Tunnel Emergency Management that Includes Human Factors Develop Education for Motorist Response to Tunnel Incidents Evaluate Effectiveness of Automatic Incident Detection Systems and Intelligent Video for Tunnels Develop Tunnel Facility Design Criteria to Promote Optimal Driver Performance and Response to Incidents Investigate One-Button Systems to Initiate Emergency Response and Automated Sensor Systems to Determine Response Use Risk-Management Approach to Tunnel Safety Inspection and Maintenance Implement Light-Emitting Diode Lighting for Safe Vehicle Distance and Edge Delineation in Tunnels
13 The Rehabilitation of an Existing Roadway Tunnel is accomplished by completing the following: Repair of all Structural S, Roadway, Mechanical and Electrical Components that have deteriorated over the course of time.
14 The Rehabilitation of an Existing Roadway Tunnel is accomplished by completing the following: Repair of all Mechanical, Electrical, and Life Safety Components that have deteriorated over the course of time.
15 Inspection, Operation, and Rehabilitation Strategies for PennDOT Tunnels II. PennDOT District 11-0 Tunnel Rehabilitation Strategies, Continued
16 Typical Tunnel Rehabilitation Items Tunnels are rehabilitated about every 40 years. Roadway repairs inside the tunnel are done every 10 years.
17 Ft. Pitt Tunnel Rehabilitation NEW TUNNEL EXISTING TUNNEL Right Barrier 2-0 Left Barrier 2-0 Lanes Curb Gutters 2 5 Vertical Clear 14-1 Right Curb 1-7 Left Curb 3-5 Lanes Curb Gutters 2 5 Vertical Clear $20 M Total Construction Cost
18 Fort Pitt Tunnel Major New Components
19 Ft. Pitt Tunnel Roadway Construction Completed Barrier and Roadway Demolition in left lane Roadway Barrier placement by Slip forming
20 Ft. Pitt Tunnel Wall Repair Details Delaminated ceramic tile repair on ceiling and walls Tunnel wall expansion joint repair area to replace concrete and correct wall drainage problem
21 Liberty Tunnel Rehabilitation Currently underway: Phase 1 (2008): Outbound Tunnel- Wall and Conduit Repair - $6 M Phase 2 (2009): Inbound Tunnel- Wall and Conduit Repair - $10 M Phase 3 (2010): Complete Tunnel Systems Upgrade- $45 M
22 Liberty Tunnel Rehabilitation Hydro-demolition demolition Operations
23 Liberty Tunnel Rehabilitation Shotcrete Operations
24 Liberty Tunnel Rehabilitation Shotcrete Operations
25 Liberty Tunnel Rehabilitation Finished Concrete Repairs
26 Squirrel Hill Tunnel Rehabilitation Scheduled for 2010 Projected $50M program; Consultant selected, ready to proceed to design. Construction to begin 2011.
27 Lessons Learned 1) Tunnel Rehabs can be very expensive. 2) Project Phasing should be considered. 3) Consider night and weekend work for High ADT Tunnels. 4) Rehabs are opportunities for Life Safety System upgrades. 5) Hydro-demolition demolition is a good technique to remove deteriorated concrete from tunnel ceilings.
28 Inspection, Operation, and Rehabilitation Strategies for PennDOT Tunnels III. Tunnel Inspection/Rehabilitation Background- Existing Guidelines
29 PennDOT 11-0: General Tunnel Inspection Methodology Typically performed at 2 year intervals No separate tunnel format. Data is entered into regular Bridge Mgmt. System (I-Forms) then deleted for FHWA reporting Tunnel assets treated as bridges
30 AASHTO Subcommittee on Tunnels (T-20) has been tasked with the following Develop and Maintain Specifications Develop Highway Tunnel Management Systems for AASHTO approval Identify Research Needs and recommend Research Problem Statements
31 AASHTO Subcommittee on Tunnels (T-20) Strategic Roadmap
32 Basis for Development of Rehabilitation Plans The US House of Representatives Resolution HR National Highway Bridge Reconstruction and Inspection Act of 2008 A survey was sent out Nov. 18, 2008 to all the states for the purpose of soliciting comment creation of a regulation establishing National Tunnel Inspection Standards.
33 PennDOT 11-0 Inspection Procedures In-Depth Inspections are conducted to determine the quantity and extent of defective areas. Additionally, Smoke Testing, Fan Testing, Electrical Component Inspection is also performed. FHWA Inspection Manual is useful guide for rating system but is not all- inclusive.
34 Inspection, Operation, and Rehabilitation Strategies for PennDOT Tunnels IV. Demonstration of PennDOT 11-0 Inspection and Rehabilitation Planning using TMS
35 TMS- Tunnel Management Software TMS Overview Designed to allow Tunnel Owners to monitor the physical condition of their tunnel assets Designed to be used over time to identify trends in performance/ maintenance Provides variety of data through graphical point-and and-click method
36 TMS- Tunnel Management Software PennDOT 11-0 System Map
37 TMS- Tunnel Management Software Tunnel Keyplan - Data Overview
38 TMS- Tunnel Management Software Inspection Functionality Facilitates a much more comprehensive inspection documentation/record keeping system Requires some foresight in data collection methodology and file organization Essentially all of the inspection report data, typical condition reports, photos, etc. appear in system.
39 TMS- Tunnel Management Software Development Of Rehabilitation TMS tabulates data for ease of compilation and reporting Used to prioritize repairs Some limitations on operations on data- i.e. sorting and specified reporting
40 TMS- Tunnel Management Software Output/ Maintenance Use data output to track repairs, and costs TMS incorporates ability to track incidents and maintenance expenditures
41 Inspection, Operation, and Rehabilitation Strategies for PennDOT Tunnels V. Presentation of Suggested Enhancements to the T20 Unified Inspection Methodology and TMS Software
42 Suggested Enhancements Standardization of Tunnel Inspection Documentation and ratings systems
43 Suggested Enhancements Integration with Existing Bridge/Tunnel Inspection Programs
44 Suggested Enhancements Condition Tracking/Inspection Needs vs. Maintenance/ Operation Functionality
45 Suggested Enhancements Inclusion of Mechanical/ Electrical Tracking- Assessment Capabilities
46 Suggested Enhancements Online Repository of New or Rehabilitation Tunnel Projects
47 Inspection, Operation, and Rehabilitation Strategies for PennDOT Tunnels VI. Questions
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