Advanced Construction Techniques

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1 Alaskan Way Viaduct Replacement Program Organization University of Washington Date October 20, 2011 Presentation Overview SR 99 south end viaduct replacement. Design-build contracting. SR 99 tunnel project. Construction partnering. Disputes Review Board. Fall Quarter

2 WSDOT Coordination Washington State King County WSDOT Port of Seattle City of Seattle Program History Nisqually earthquake damages viaduct. Draft EIS analyzes five alternatives. Supplemental Draft EIS analyzes two alternatives. No/no advisory vote leads to new approach. Governor signs bill endorsing bored tunnel alternative. Supplemental Draft EIS analyzes bored tunnel. Final EIS and Record of Decision issued. Public process Fall Quarter

3 Program Overview The Alaskan Way Viaduct Replacement Program includes projects led by the Washington State Department of Transportation, City of Seattle, King County and Port of Seattle. Public process Building the New SR 99 Corridor S. Holgate Street to S. King Street Project SR 99 Tunnel Project Fall Quarter

4 South Holgate to South King Street Project Before construction December 2013 STAGING AREA CONTINUING CONSTRUCTION Roadway will be complete in SR 99 remains open during construction. Viaduct s south end will be demolished beginning in October Building the SR 99 Construction Bypass Fall Quarter

5 Demolition Time Lapse Video Realigned SR 99 On- and Off-ramps Fall Quarter

6 Building the SR 99 Roadway Foundation Building Pier Shafts Fall Quarter

7 Driving Piles for the New SR 99 Roadway Piles for the New SR 99 Roadway Fall Quarter

8 Constructing Rebar Cages Building the New SR 99 Roadway Fall Quarter

9 Supporting the New SR 99 Roadway Geofoam Embankment Public process Fall Quarter

10 SR 99 Today Maintaining Traffic During Construction Fall Quarter

11 Changes to SR 99 After the Closure What is Design-Build Contracting? Design-Build ild a method of project delivery in which h the owner executes a single contract with one entity (the Design- Builder) for design and construction services to provide a finished product. VS. Design-Bid-Build traditional approach for delivery of transportation projects where the owner completes the design and accepts the lowest responsive bid for construction from qualified contractors. Fall Quarter

12 Design-Build Legislation History 1998, WSDOT authorized to complete design-build contracting pilot project. 2001, Design-build contracting authorized for use on transportation projects more than $10 million. 2006, WSDOT authorized to pilot up to five projects between $2 and $10 million. 2007, Expiration date deleted from RCW I-405 Kirkland Nickel Stage 1. Design-Build Considerations Time Allows construction to start without final design of all project elements. Design is tailored to contractors means and methods. Generally leads to earlier completion date Budget Requires fewer owner staff. Can lead to earlier cost certainty. Errors and omissions not owner s responsibility. Additional risk is assigned to contractor. Fall Quarter

13 Comparison of Contracting Approaches Typical design-bid-build process Environmental analysis and preliminary design NEPA complete 100% design and permits Typical design-build process Environmental analysis and preliminary design NEPA complete Procurement Begin construction Permits NTP Accelerated design-build ild process Environmental analysis and preliminary design NEPA complete Procurement Final design Begin construction ti Permits Procurement NTP 1 DB preliminary design NTP 2 Begin construction DB final design Design-Build Procurement Process Request for qualifications Design-Build ild teams submit statements t t of qualifications (SOQ). WSDOT evaluates SOQs and ranks based on predetermined scoring approach. Short listed teams notified Request for Proposals (RFP) Short listed teams prepare proposals. WSDOT evaluates proposals based on predetermined scoring approach. Best value selection = technical evaluation score x $10,000,000 $ Price Proposal Fall Quarter

14 Before Advertisement of a Design-Build Contract Environmental processes mostly completed. Major permits approved. Right-of-way acquired. Preliminary design or conceptual design completed. Base data such as soil conditions and existing utilities obtained. Agreements with outside partners acquired. Project funding secured. Goals for project outcome defined. WSDOT Design-Build Projects Majority of projects are lump sum fixed price. Selected on basis of best value. Project duration is typically two to five years. Cost range is from $22 million to $1.3 billion. Cost growth historically ranged from approximately one to three percent. No claims were made on any of the 13 WSDOT projects to date. SR 16 Tacoma Narrows Bridge. Fall Quarter

15 SR 532 Recent WSDOT Design-Build Contracts SR-519 Phase Two Intermodal. SR 532 Safety Improvements and Congestion Relief. SR 520 Bridge and Landings. 520 Eastside HOV. SR 99 Tunnel Project. SR SR 520 Bridge Replacement. SR 99 Tunnel Approximately two miles long. Tunnel designed to 2,500 year earthquake standard (in the range of a 9.0 earthquake). Project cost is $1.9 billion. Design concept. Seattle Center Fall Quarter

16 South Portal Design North Portal Design Fall Quarter

17 Tunnel Boring Machine Tunnel Boring Machine Video Fall Quarter

18 Tunneling in Seattle Soils More than 150 tunnels have been constructed in Seattle since 1890, mostly in glacial soils. Examples of local projects include: Sound Transit Beacon Hill Tunnel Downtown Seattle Transit Tunnel Mt. Baker Ridge Tunnel (I-90) Denny Way Combined Sewer Overflow Burlington-Northern Railroad Tunnel. Link light rail s tunnel boring machine breaks through the east side of Beacon Hill (May 2007). Properties Above and Near the Tunnel The blue line indicates the route for the SR 99 tunnel. The areas shaded in red indicate where monitoring will take place during tunnel construction. Fall Quarter

19 Preconstruction surveys will document existing building conditions. Protecting Buildings Buildings along the tunnel alignment will be equipped with monitoring equipment to prevent and minimize possible settlement-related damage. WSDOT would be responsible for any damage caused by tunnel construction work. Crack gauge on building wall. Some buildings will need soil improvements or other mitigation in addition to monitoring. WSDOT and the contractor will identify which buildings need mitigation and the most effective method. Crews will improve soil conditions as a preventative measure where soils are soft and the water table is high. Soil Improvements Fall Quarter

20 Protecting Buildings Diagram of micropile walls. Items not not to scale to scale Construction Timeline S. Holgate to S. King Street roadway South end viaduct demolition Tunnel portals - utility relocation Tunnel portals - cut-and-cover sections, buildings Tunnel boring Interior roadway and systems On/off-ramp construction Tunnel open to drivers Central waterfront viaduct demolition Surface street improvements Fall Quarter

21 What is Construction Partnering? Working together. Building relationships. Understanding the needs of the other parties and a philosophy of teamwork. Committing to cooperation and communication. An attitude of goodwill and trust. t Sharing risks with a "win-win-win" attitude. Construction Partnering Benefits Total project costs were reduced d by 10 percent. Profitability increased by 25 percent. Overall project completion time was reduced by 20 percent. Schedule changes were reduced by 48 percent. Fall Quarter

22 Construction Partnering Workshops Partnering workshops should be attended by all project personnel with decision making authority, including: Owner representatives. Consulting engineer/architect/design firm representatives. Contractors. Major sub-contractors. Major suppliers. Major municipality representatives. Environmental officials. Safety officials. Disputes Review Board Assist in the resolution of disputes between WSDOT and the design-builder. ild Three person board of independent experts. Utilize when standard dispute resolution is unsuccessful and prior to the filing of a claim. Provide nonbinding recommendations Provide nonbinding recommendations designed to expose the disputing parties to an independent view. Fall Quarter

23 Questions or Comments Website: Hotline: AWV-LINE Back Pocket Fall Quarter

24 SR 99 Tunnel Video Elements to Consider in Mega Project Delivery Public involvement Environmental process Funding Managing risks Fall Quarter

25 WSDOT Design-Build Policy Management State Construction Engineer Design-Build Policy Team WSDOT/AGC/ACEC Team Design-Build Work Groups Keeping People and Goods Moving During Construction Roadway improvements: SR 519 and Spokane Street Viaduct Fourth Avenue off-ramp. Transit investments: Added bus service and strategies to encourage transit, carpools and vanpools. System reliability: New electronic and travel time signs on I-5; and new electronic message signs on SR 99 and other routes to downtown. Increased service from West Seattle. Driver information signs on I-5. Fall Quarter

26 South Holgate to South King Viaduct Replacement Existing South Holgate to South King Viaduct Replacement Future Fall Quarter

27 Building the New SR 99 Roadway Public process Construction Bypass Looking North Fall Quarter

28 Construction Bypass Looking South Bike Routes from West Seattle to Downtown Fall Quarter

29 Transit Routes During the SR 99 Closure Southbound Northbound Transit Options During the SR 99 Closure Fall Quarter

30 Electronic Message Board Locations Keeping Transit Moving During Construction Metro is making route and schedule changes to maintain reliable service during construction. In October, 92 trips will have been added to the SR 99 corridor since During the nine-day closure, 11 bus routes that currently operate on SR 99 will be rerouted through SODO. More information is available on King County Metro s website. Fall Quarter

31 How to Get Around During the SR 99 Closure Carpool, vanpool or vanshare. Take the bus, water taxi, light rail, train or bike to work. Work from home. Adjust your work schedule. Use alternate routes where possible. Plan for delays and added travel time. Listen to radio traffic reports and use electronic message boards to get upto-the minute information. The West Seattle water taxi. Delay or reschedule discretionary trips. Nine-Day SR 99 Closure: Oct :30 p.m. Friday, Oct. 21 through 5 a.m. Monday, Oct. 31. Southbound SR 99 Between the Battery Street Tunnel and West Seattle Bridge closed around-the-clock. Northbound SR 99: Between the West Seattle Bridge and S. Royal Brougham Way closed around-the-clock. Between the S. Royal Brougham Way on-ramp and the Battery Street Tunnel open Monday through Friday from 5 a.m. to 7 p.m., and for special events at CenturyLink Field. Fall Quarter

32 Reduced Speed Limit Zones on SR 99 SR 99 Tunnel Video Fall Quarter

33 Upcoming Tunnel Construction Order the tunnel boring machine. Mobilize crews and equipment on construction site. Begin to relocate utilities in south and north portal areas. Begin settlement mitigation work for buildings and structures at the south end. Build launch pit for boring machine. Advisory Committee on Tolling The committee will make advisory recommendations on strategies for: otolling the SR 99 tunnel; ominimizing traffic diversion from the tunnel due to tolling; and omitigating traffic diversion effects on city streets and I-5. Electronic tolling at Tacoma Narrows Bridge. Any recommendations will need to be implemented by the State, City of Seattle, Port of Seattle, and/or King County. Fall Quarter

34 Advisory Committee on Tolling On Sept. 19 the Seattle City Council confirmed 15 committee members. five selected by City Council five selected by Mayor five selected by WSDOT First meeting in November. Meetings will be open to the public. Initial recommendations due December Committee will work until up to one year after tolling begins. Committee Members The City Council appointed: 1. Charley Royer 2. Henry Yates 3. Bob Davidson 4. Rob Johnson 5. Phil Fujii WSDOT appointed: 1. Maud Daudon 2. Sung Yang 3. Claudia Balducci 4. Kurt Beckett 5. Rick Bender The Mayor appointed: 1A G d hild 1. Anne Goodchild 2. Marcus Charles 3. Sharon Maeda 4. Peg Staehli 5. Tessa Greegor Fall Quarter

35 Seattle Tunnel Partners Barcelona Line 9 Metro Extension Near La Sagrada Familia Successful Delivery of Bored Tunnels Examples of tunnel excavation in urban areas with similar tunnel diameters: 4th Elbe River, Germany: 1.6 miles, 46.6 diameter Madrid M30, Spain: Two 1.3 mile bores, 50 diameter Shanghai Yangtze River, China: Two 4.6 mile bores, 50.6 diameter Madrid M30 TBM at the Herrenknecht factory. Fall Quarter

36 Grouting During Tunneling Cutting Face Shield Grouting Tail Grouting Muck Chamber Shield Liner Shield Grouting Tail Grouting Tunnel Liner Panels Ten panels per ring. 9,273 linear feet of tunnel. Ring width 6.53 feet. Number of Rings:1,420. Total number of panels:14,200. Each panel is 18.2 feet by 6.53 feet by 2 feet (9 cubic yards per panel). Approximately125,000 cubic yards. Compressive strength at 56 days, 7,000 psi with five percent microsilica. SR 99 Tunnel Fall Quarter

37 Precast Interior Structure Interior structure cast-inplace/precast per designbuilder. Roadway slabs (2,200 each). Wall panels with barriers (4,400 each). Egress walkways (2,200 each). 72,000 cubic yards of concrete for the interior structure. Compressive strength at 56 days, 4,000 psi with five percent microsilica. SR 99 Tunnel Settlement Monitoring WSDOT developed settlement criteria for contractor. Buildings will be equipped with real-time monitoring devices. Monitoring buildings and working with property owners will help prevent and minimize settlement-related damage. Installation of vibration and tilt instruments in the basement of a building. Fall Quarter

38 Subsurface Property Rights WSDOT will purchase subsurface parcels for the SR 99 tunnel. Purchase process: Appraise change in property s fair market value. Present offer to purchase with copy of appraisal report. Negotiate purchase agreements. Subsurface acquisition area Items not to scale State Project Delivery State Projects Budget ($ in millions) SR 99 Tunnel Project $1,960.7 million SR 99 S. Holgate Street to S. King Street Project $394.8 million Central Waterfront Viaduct Removal and New Alaskan $290 million Way Central Waterfront Construction Mitigation $30 million Program Management $75 million Other Moving Forward Projects $187.2 million Prior Environmental Impact Statements, Right of Way and $163.7 million Design Costs Total $3,101.4 Fall Quarter

39 City of Seattle Projects City Project Delivery Project Budget ($ in millions) AWV Program Portion ($ in millions) Elliott Bay Seawall Project $ million $ million Mercer Corridor Project - Mercer East - Mercer West and Parking Program $164 million $116 million $50 million $116 million S. Spokane Street Viaduct Widening Project $163 million* $30 million Waterfront Seattle (Central Waterfront Public $123 million $123 million Spaces and Streets) First Avenue Streetcar (Evaluated as Part of the - - Transit Master Plan) Public Utility Relocation (AWV-related projects) $239 million $239 million Total $1,115-1,195 $ * WSDOT contributed $50 million to the Spokane Street Viaduct project as part of construction mitigation for the south end viaduct replacement. County and Port Project Delivery King County Projects Construction Transit Service (S. Holgate to S. King Street) Transit Investments (SR 99 tunnel) $32 million $190 million Port of Seattle Committed Funding $300 million Fall Quarter

40 South Portal Design Construction Coordination Goals No surprises. Maintain public trust. Agencies continue to work together. Coordinate work to minimize impacts to the public. Identify potential conflicts. Keep users (bicycles, pedestrians, transit, freight, drivers) moving. Maintain business and resident access. Build upon past experience. 13 Fall Quarter

41 Ongoing Construction Outreach Door to door outreach and weekly s to project neighbors. Weekly construction updates at Maintenance of Traffic meetings. Regular contact with residents and businesses in Pioneer Square, SODO/Duwamish and West Seattle. Provide updates to neighbors with sensitive equipment. News releases and media availabilities. Daily website updates. Real-time transit alerts via and text message. Program staff talk with members of the community at a public meeting. 81 Realigned SR 99 On- and Off-Ramps SR 99 southbound off ramp SR 99 northbound on ramp First Avenue S. Fall Quarter

42 S. Holgate to S. King Street Project Fall Quarter