Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 1
Alaskan Way Viaduct Replacement Program
OrganizationUniversity of WashingtonOrganizationDateUniversity of WashingtonOctober 20, 2011
Presentation Overview
• SR 99 south end viaduct replacement.
• Design-build contracting.• SR 99 tunnel project. • Construction partnering.
Di t R i B d• Disputes Review Board.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 2
Washington Ki C t
WSDOT Coordination
Washington State King County
WSDOT
Port of Seattle City of Seattle
Program History
2001 2004 2006 2007 2009 20112010Nisqually 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.
Public process
Final EIS and Record of Decision issued.
Supplemental Draft EIS analyzes bored tunnel.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 3
Program OverviewThe 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
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 4
South Holgate to South King Street Project
Before construction December 2013
STAGING AREA CONTINUING CONSTRUCTION
• Roadway will be complete in 2013.• SR 99 remains open during construction.• Viaduct’s south end will be demolished beginning in October 2011.
Building the SR 99 Construction Bypass
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 5
Demolition Time Lapse Video
Realigned SR 99 On- and Off-ramps
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 6
Building the SR 99 Roadway Foundation
Building Pier Shafts
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 7
Driving Piles for the New SR 99 Roadway
Piles for the New SR 99 Roadway
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 8
Constructing Rebar Cages
Building the New SR 99 Roadway
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 9
Supporting the New SR 99 Roadway
Geofoam Embankment
Public process
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 10
SR 99 Today
Maintaining Traffic During Construction
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 11
Changes to SR 99 After the Closure
What is Design-Build Contracting?
D i B ild th d f j t d li i hi h thDesign-Build – a method of project delivery in which 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 p p j p gand accepts the lowest responsive bid for construction from qualified contractors.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 12
• 1998, WSDOT authorized to complete
Design-Build Legislation History
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 47.20.780. 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.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 13
Comparison of Contracting Approaches
Environmental analysis and preliminary design
Typical design-bid-build processNEPA
completeNEPA
complete
Environmental analysis and preliminary design
Permits
Procurement Final designA l t d d i b ild
NTP
100% design and permits
Procurement Beginconstruction
Beginconstruction
NEPAcomplete
NEPAcomplete
Begint ti
Begint ti
Typical design-build process
Environmental analysis and preliminary design
Permits
Procurement
DB preliminary DB finaldesign design
Accelerated design-build processNEPA
completeNEPA
complete
NTPNTP1
NTPNTP2
Beginconstruction
Beginconstruction
constructionconstruction
Design-Build Procurement Process
• Request for qualifications
D i B ild t b it t t t f lifi ti• Design-Build teams submit statements 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
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 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.A t ith t id t i d• Agreements with outside partners acquired.
• Project funding secured.• Goals for project outcome defined.
WSDOT Design-Build Projects
• Majority of projects are lump sum fi d ifixed 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 SR 16 Tacoma Narrows Bridge.g y g
from approximately one to three percent.
• No claims were made on any of the 13 WSDOT projects to date.
g
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 15
Recent WSDOT Design-Build Contracts• SR-519 Phase Two Intermodal.• SR 532 Safety Improvements and Congestion Relief.
SR 532
y p g• SR 520 Bridge and Landings.• 520 Eastside HOV.• SR 99 Tunnel Project.
29SR 520 Bridge Replacement.SR 532.
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
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 16
South Portal Design
North Portal Design
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 17
Tunnel Boring Machine
Tunnel Boring Machine Video
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 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 T lTunnel
• 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.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 19
Protecting Buildings
• Preconstruction surveys will document existing building g gconditions.
• Buildings along the tunnel alignment will be equipped with monitoring equipment to prevent and minimize possible settlement-related ddamage.
• WSDOT would be responsible for any damage caused by tunnel construction work.
Crack gauge on building wall.
Soil Improvements• 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 methodeffective method.
• Crews will improve soil conditions as a preventative measure where soils are soft and the water table is high.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 20
Protecting Buildings
Diagram of micropile walls.Items not to scaleItems not to scale
Construction Timeline2011 2012 2013 2014 2015 2016 2017
S. Holgate to S. King Street roadway
Tunnel portals - cut-and-cover sections, buildings
Tunnel portals - utility relocation
Tunnel boring
g g y
South end viaduct demolition
On/off-ramp construction
Central waterfront viaduct demolition
Surface street improvements
Tunnel open to drivers
Interior roadway and systems
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 21
• Working together.
What is Construction Partnering?
g g• Building relationships. • Understanding the needs of the
other parties’ and a philosophy of teamwork.
• Committing to cooperation and communication.A ttit d f d ill d t t• An attitude of goodwill and trust.
• Sharing risks with a "win-win-win" attitude.
• Total project costs were d d b 10 t
Construction Partnering Benefits
reduced by 10 percent.• Profitability increased by 25
percent. • Overall project completion time
was reduced by 20 percent.• Schedule changes were
reduced by 48 percent.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 22
Partnering workshops should be attended by all project personnel with decision making authority, including:
Construction Partnering Workshops
• 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 d th d i b ildWSDOT and the design-builder.
• Three person board of independent experts.
• Utilize when standard dispute resolution is unsuccessful and prior to the filing of a claim.
• Provide nonbinding recommendationsProvide nonbinding recommendations designed to expose the disputing parties to an independent view.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 23
Website: l k i d t
Questions or Comments
www.alaskanwayviaduct.org
Email:[email protected]
Hotline:1 888 AWV LINE1-888-AWV-LINE
Back Pocket
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 24
SR 99 Tunnel Video
Elements to Consider in Mega Project Delivery
• Public involvement• Environmental process• Funding• Managing risks
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 25
WSDOT Design-Build Policy Management
State Construction Engineer
Design-Build Policy Team
WSDOT/AGC/ACEC TWSDOT/AGC/ACEC Team
Design-Build Work Groups
Keeping People and Goods Moving During Construction
• Roadway improvements: SR 519 and Spokane Street Viaduct FourthRoadway 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.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 26
South Holgate to South King Viaduct Replacement
Existing
South Holgate to South King Viaduct Replacement
Future
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 27
Building the New SR 99 Roadway
Public process
Construction Bypass – Looking North
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 28
Construction Bypass – Looking South
Bike Routes from West Seattle to Downtown
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 29
Transit Routes During the SR 99 Closure
Southbound Northbound
Transit Options During the SR 99 Closure
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 30
Electronic Message Board Locations
• Metro is making route and sched le changes to maintain
Keeping Transit Moving During Construction
schedule changes to maintain reliable service during construction.
• In October, 92 trips will have been added to the SR 99 corridor since 2010.
• During the nine-day closure, 11 g ybus routes that currently operate on SR 99 will be rerouted through SODO.
• More information is available on King County Metro’s website.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 31
How to Get Around During the SR 99 Closure• Carpool, vanpool or vanshare.
• Take the bus water taxi light rail• 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.The West Seattle water taxi
• Listen to radio traffic reports and use electronic message boards to get up-to-the minute information.
• Delay or reschedule discretionary trips.
The West Seattle water taxi.
Nine-Day SR 99 Closure: Oct. 21-31
7:30 p m Friday Oct 21 through 5 a m Monday Oct 31• 7:30 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.y• 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.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 32
Reduced Speed Limit Zones on SR 99
SR 99 Tunnel Video
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 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.
B ild l h it f b i hi• Build launch pit for boring machine.
Advisory Committee on Tolling
• The committee will make advisory recommendations on strategies
Electronic tolling at Tacoma Narrows Bridge.
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. y
• Any recommendations will need to be implemented by the State, City of Seattle, Port of Seattle, and/or King County.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 34
O S t 19 th S ttl Cit C il fi d 15 itt
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 2012• Initial recommendations due December 2012.• Committee will work until up to one year after tolling begins.
Committee MembersThe City Council appointed:
1. Charley RoyerWSDOT appointed:
1. Maud Daudon2. Henry Yates3. Bob Davidson4. Rob Johnson5. Phil Fujii
2. Sung Yang3. Claudia Balducci4. Kurt Beckett5. Rick Bender
The Mayor appointed:1 A G d hild1. Anne Goodchild2. Marcus Charles3. Sharon Maeda4. Peg Staehli5. Tessa Greegor
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 35
Seattle Tunnel Partners
Barcelona Line 9 Metro Extension Near La Sagrada Familia
Successful Delivery of Bored Tunnels
Examples of tunnel excavation
• 4th Elbe River, Germany: 1.6 miles, 46.6’ diameter
• Madrid M30, Spain: Two 1.3 mile bores, 50’ diameter
pin urban areas with similar tunnel diameters:
• Shanghai Yangtze River, China: Two 4.6 mile bores, 50.6’ diameter Madrid M30 TBM at the Herrenknecht factory.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 36
Shield Grouting
Grouting During Tunneling
Cutting Face
MuckChamber Shield Liner
Shield GroutingTail Grouting
Shield GroutingTail Grouting
Tunnel Liner Panels
SR 99 Tunnel
• 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 perfeet by 2 feet (9 cubic yards per panel).
• Approximately125,000 cubic yards.
• Compressive strength at 56 days, 7,000 psi with five percent microsilica.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 37
Precast Interior Structure• Interior structure cast-in-
SR 99 Tunnel
place/precast per design-builder.
• Roadway slabs (2,200 each).
• Wall panels with barriers (4,400 each).
• Egress walkways (2,200 each).each).
• 72,000 cubic yards of concrete for the interior structure.
• Compressive strength at 56 days, 4,000 psi with five percent microsilica.
Settlement Monitoring
• WSDOT developed settlementWSDOT developed settlement criteria for contractor.
• Buildings will be equipped with real-time monitoring devices.
• Monitoring buildings and ki ith tworking with property owners
will help prevent and minimize settlement-related damage.
Installation of vibration and tilt instruments in the basement of a building.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 38
Subsurface Property Rights
WSDOT will purchase subsurface• 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 reportcopy of appraisal report.
• Negotiate purchase agreements.Subsurface acquisition area
Items not to scale
State Project Delivery
State Projects Budget($ in millions)($ in millions)
SR 99 Tunnel Project $1,960.7 millionSR 99 S. Holgate Street to S. King Street Project $394.8 millionCentral Waterfront Viaduct Removal and New Alaskan Way
$290 million
Central Waterfront Construction Mitigation $30 millionProgram Management $75 millionOther Moving Forward Projects $187 2 millionOther Moving Forward Projects $187.2 millionPrior Environmental Impact Statements, Right of Way and Design Costs
$163.7 million
Total $3,101.4
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 39
City of Seattle Projects Project Budget ($ in millions)
AWV Program Portion
($ in millions)
City Project Delivery
($ in millions)Elliott Bay Seawall Project $310-390 million $310-390 millionMercer 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 millionWaterfront Seattle (Central Waterfront Public Spaces and Streets)
$123 million $123 millionp )
First Avenue Streetcar (Evaluated as Part of the Transit Master Plan)
- -
Public Utility Relocation (AWV-related projects) $239 million $239 millionTotal $1,115-1,195 $868-948* WSDOT contributed $50 million to the Spokane Street Viaduct project as part of construction mitigation for the southend viaduct replacement.
County and Port Project Delivery
King County ProjectsConstruction Transit Service (S. Holgate to S. King Street)
$32 million
Transit Investments (SR 99 tunnel) $190 million
Port of SeattleCommitted Funding $300 million
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 40
South Portal Design
Construction Coordination Goals
• No surprises. • Identify potential conflicts.
• Maintain public trust.
• Agencies continue to work together.
• Coordinate work to minimize impacts to the public.
• Keep users (bicycles, pedestrians, transit, freight, drivers) moving.
• Maintain business and resident access.
• Build upon past experience.
13
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 41
Ongoing Construction Outreach• Door to door outreach and weekly
emails 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 iti i tsensitive equipment.
• News releases and media availabilities.
• Daily website updates.
• Real-time transit alerts via email 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‐rampFirst Avenue S.
Advanced Construction TechniquesWashington Department of Transportation Presentation
Mr. David Sowers; Construction Manager; Alaska Way ViaductFall Quarter 2011 42
S. Holgate to S. King Street Project