Constructability Challenges on the Church Street South Extension over New Haven Interlocking and Rai

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Constructability Challenges on the Church
Street South Extension over New Haven
Interlocking and Rail Yard Project
New Haven, CT
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Tonights Presentation

• Overview
• Proposed Bridge
• Erection Schemes
• High Capacity Crane
• Construction

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Church Street South Extension
Overview
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Project Objectives

• Connect New Havens downtown and Long Wharf
  areas.
• Create a new elevated structure over New Haven
  Rail Yard.
• Provide access for both vehicles and pedestrians.

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New Haven Interlocking and Rail Yard
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Main Challenges

• Impact on rail yard operations
• Limited space within the yard
• Limited number of track and power outages
• Bridge Construction Method
• Contract Documents

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Geotechnical Concerns
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Church Street South Extension
Proposed Bridge
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Proposed Bridge
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Main Span Requirements

• Cross Parcel G tracks, Mainline tracks, work
  tracks without intermediate pier
• Minimize superstructure depth
• Through truss chosen from structure type studies

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Innovative Materials

• FHWA program provides funding to include
  innovative materials in project.
• High Performance Steel
• High Performance Concrete
• Stainless Steel Cladded / MMFX Reinforcement
• Galvanized Steel

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Galvanized Connections

• Method
• Mask bolt faying surface prior to cleaning
• Sandblast disrupted galvanized coating
• Provide Class B primer at faying surfaces

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Church Street South Extension
Erection Schemes
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Main Span Erection Schemes

• Construct in place
• Horizontal launching
• High capacity crane pick

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Construct in Place

• Requires most power outages
• Highest impact to Rail Yard operations
• Highest scheduling effort and construction cost

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Horizontal Launching

• Requires intermediate support in mainline or a
  separate launching truss
• Reduced power outages required
• Reduced impact to rail yard operations
• Mid-level scheduling effort and construction cost

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High Capacity Crane Pick

• Minimizes power outages required
• Minimizes impacts to rail yard
• Reduced scheduling and construction cost
• Innovative method
• Only erection scheme that would be allowed

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Church Street South Extension
High Capacity Crane
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High Capacity Crane

• Identified Potential Companies
• Presentations
• Adequate Capacity
• Availability
• Site Requirements
• ConnDOT MNRR Approval

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High Capacity Cranes

• Mammoet MSG-50

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High Capacity Cranes

• Van Seumeren Platform Twin Ring

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High Capacity Cranes

• Lampson LTL-2600

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Church Street South Extension
Construction
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Construction Team

• OG Industries prime contractor
• Lampson International crane subcontractor
• National Eastern steel fabricator
• Hartland Building and Restoration truss erection
  subcontractor

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Prestressed Concrete Piles
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Crane Foundation

• 3 foot thick concrete mat

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Truss Assembly
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Crane Delivered to Site
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Crane Foundation

• Preloaded to 125 of intended crane reaction

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Rigged with truss
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Test Lift
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Actual Pick
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Actual Pick
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Day After Pick
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Truss in place
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Completed Truss Span
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Completed Project

• New Havens gateway to the waterfront
• Completed 5 months ahead of schedule
• 500,000 under budget
• AGC 2004 Build Connecticut Award Recipient
• National Partnership for Highway Quality (NPHQ)
  Risk Taking Award Nominee

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Completed Project
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QUESTIONS