alaskan way viaduct replacement programcourses.washington.edu/cm510/wsdot.pdf · advanced...

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.



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.



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



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



Demolition Time Lapse Video

Realigned SR 99 On- and Off-ramps



Building the SR 99 Roadway Foundation

Building Pier Shafts



Driving Piles for the New SR 99 Roadway

Piles for the New SR 99 Roadway



Constructing Rebar Cages

Building the New SR 99 Roadway



Supporting the New SR 99 Roadway

Geofoam Embankment

Public process



SR 99 Today

Maintaining Traffic During Construction



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.



• 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.



Comparison of Contracting Approaches

Environmental analysis and preliminary design

Typical design-bid-build processNEPA

completeNEPA

complete


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


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



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



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



South Portal Design

North Portal Design



Tunnel Boring Machine

Tunnel Boring Machine Video



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.



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.



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



• 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.



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.



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



SR 99 Tunnel Video

Elements to Consider in Mega Project Delivery

• Public involvement• Environmental process• Funding• Managing risks



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.



South Holgate to South King Viaduct Replacement

Existing

South Holgate to South King Viaduct Replacement

Future



Building the New SR 99 Roadway

Public process

Construction Bypass – Looking North



Construction Bypass – Looking South

Bike Routes from West Seattle to Downtown



Transit Routes During the SR 99 Closure

Southbound Northbound

Transit Options During the SR 99 Closure



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.



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.



Reduced Speed Limit Zones on SR 99

SR 99 Tunnel Video



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.



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



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.



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.



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.



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



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



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



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.



S. Holgate to S. King Street Project

alaskan way viaduct replacement programcourses.washington.edu/cm510/wsdot.pdf · advanced...

Documents