Arlington Memorial Bridge Rehabilitation -...
Transcript of Arlington Memorial Bridge Rehabilitation -...
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Arlington Memorial Bridge Rehabilitation
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Presentation Overview
▪ EFLHD Introduction
▪ Arlington Memorial Bridge
▪ Project Location
▪ Historic & Cultural Significance
▪ Bridge Overview
▪ Design & Construction
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Office of Federal Lands Highway
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OverviewFLH Core Business:▪ Project Delivery
• Engineering Services• Technical Expertise
▪ Liaison with Federal Land Management Agencies▪ Training and Development▪ Deployment of New Technologies▪ 706 FHWA Employees (approx. 23% of FHWA)
Eastern Federal Lands Program: ▪ $160-200 Million FLHP Funds Allocations In A Year▪ 40-50 Construction Contracts Awarded Annually
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Services Provided▪ Program Administration
▪ Emergency Response
▪ Transportation Planning
▪ Highway Design
▪ Contract Procurement
▪ Construction Management
▪ Road Inventory
▪ Asset Management
• Bridge and Pavement Management
▪ Environmental Compliance
▪ Bridge Inventory
▪ Training & Technical Support
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Our Methods
▪ Design-Bid-Build
▪ Contract Manager/General Contractor (CMGC)
▪ Design-Build
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Federal Partner Agencies
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Other Partners
▪ Federally recognized Indian tribal governments
▪ State DOTs
▪ Local Governments (Cities/Counties)
▪ U.S. Virgin Islands
▪ District of Columbia
▪ Private Entities (for example CSX)
▪ Other Federal Agencies
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Our Nicheflexible solutions for unique needs
▪ Aesthetic, Historic, Cultural, and Environmentally Sensitive Projects
▪ Highly Visible, Politically Sensitive Projects with Security Requirements
▪ Hands-On Project Delivery
▪ Collaboration with Multiple Partners
▪ Independent 3rd Party Facilitator with Decision Making Responsibility
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AMB – Location
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Historic & Cultural Significance
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Bridge Overview
• Built 1926-1932• Opened in 1932• 2,162 feet long• 94 feet wide
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Bridge Overview
• 11 Spans total• 10 reinforced concrete arch spans• Two 50-ft spans over roadways (underpasses)• 8 spans over Potomac River, 166 – 180 ft• Center double-leaf steel bascule span – 216 ft
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Bridge Overview
• (6) 10-ft lanes of traffic• (2) 14-ft sidewalks• ≈ 65,000 vehicles per day
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Bridge Overview
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Bridge Overview - Bascule
• Largest & Heaviest at 8,650 kips total with a 6,508 kip counterweight
• Quickest to open when built• Last opened in 1960’s
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Bridge Overview - Bascule
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Bridge Overview – Existing Condition
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Bridge Overview – Existing Condition
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Bridge Overview – Existing Condition
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Increased Inspections
Inspection Frequency:
▪ Bascule Trunnion Post Inspection –Every 2 Months
▪ In-depth Inspection – semi annual inspections (rotate in-depth and interim) of deck, concrete beams, and bascule span – 6 Months
▪ Entire Bridge Routine Inspection –24 Months
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Design and Construction
Design-Build Project
2 Step Process to Select DB-Team
1) Request for Qualifications
- Short list top firms
2) Request for Proposals
- Select Best Value based on Technical and Price Proposals
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Design and Construction
▪ Scope of Work▪ Complete Deck Replacement – Precast Panels, UHPC,
LMC overlay▪ Replacement of Bascule Span with fixed span▪ Concrete repairs and Replacement of Pier Frames/Select
Crosswalls▪ Granite removal and reset, cleaning and repair▪ Sidewalk replacement▪ Restoration of metal fascia, rail, light poles
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Design and Construction
Contract Info:
▪ Overall $227M Project
▪ 1,000 Calendar Days Schedule
▪ Major Construction Started October 2018
▪ First phase complete November 2019
▪ Anticipated completion Early 2021
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Design and Construction
NPS – Owner/Maintaining Agency
FHWA – Prelim Engineering andConstruction Contract Administration
Kiewit – Design-Build Contractor
Stakeholders (DDOT, VDOT, Arlington County, SHPOs, CFA)
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Design & Construction
Construction in 2 Phases
▪ Closed 3 lanes on one side for construction
▪ 3 lanes for traffic on other side• 2 lanes inbound and 1 outbound
in morning• 1 lane inbound and 2 outbound
in evening
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Traffic Impacts
Traffic impacts analyzed with regional traffic models in Environmental Assessment and the Transportation Management Plan
3-lane closure on Arlington Memorial Bridge resulted in increased traffic volumes on adjacent bridges
Coordination with NPS, VDOT, DDOT and Arlington County
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Traffic Control – Lane Use Control Signs
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Design & Construction
Deck Replacement▪ 10” precast deck with 2” LMC overlay▪ UHPC closures between deck panels▪ Stainless steel reinforcement▪ Stainless steel prestressing strand▪ Cast in place exposed aggregate sidewalk
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Design & Construction
Variable depth truss bascule spans replaced with a variable depth steel plate girder▪ Understory truss to replicate existing▪ Shallow section at mid-span▪ Required 70 ksi bottom flange
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Design & Construction
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Phase 1 Construction
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Bascule Shoring
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Bascule Fascia Removal
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Bascule Removal
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Deck and Beam Removal
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Crosswalls after Deck Removal
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Precast Deck Install
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Precast Concrete Deck
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UHPC Closure Pours
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Steel Girder Install
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Fascia Re-Install
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Granite Reset
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LMC Overlay
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Exposed Aggregate Sidewalk
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Near Completion of Phase 1
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Any Questions?