st croix river crossing s.p. 8221-82045 contractor information meeting 15 may 2013 river spans
TRANSCRIPT
St Croix River CrossingS.P. 8221-82045
Contractor Information Meeting15 May 2013
River Spans
General Arrangement
Main Span
3360' single structural unit Expansion joints at Pier 7 and East Abutment 600' extradose spans Twin wall pier legs to address time dependent and thermal effects
Towers
Tower Sections
Tower Sections
Main Span - ReinforcingReinforcing Grade Generally grade 60, except: Verticals on crossbeam – Gr 75 Deck level stay anchor blocks Gr 75
Corrosion Protection Generally epoxy coated except: Pier 8 legs for 10' below knuckle – SS Deck top slab reinforcing – SS
Main Span - ConcreteConcrete – Substructure and Towers Generally 6000 psi @ 28 days, except: Towers 24' below to 3' above crossbeam
8000 psi @ 56 days
Concrete - Deck Generally 8000 psi @ 56 days, except: First 8 precast deck segments 9000 psi @ 180 days
Tower – Leg Reinforcing
Tower Reinfrocing
Tower Reinforcing
Tower Reinforcing
Tower - Crossbeam
Tower – Crossbeam PT
Tower - Crossbeam PT
Tower - Crossbeam PT
Tower Crossbeam Node PT
Tower Crossbeam Node Reinforcing
Tower Crossbeam Node Reinforcing
Pylon Crossbeam Node
Pylon Crossbeam Node
CIP Pier Table
Upper Tower
Tower - Anchor Box
Tower Anchor Box
Stay Cables Parallel Strand Stay Cable System All stays 76 – 0.62" stays Working at higher load than cable stays (0.52 fpu) Live end in tower Testing requirements per 6th Edition of PTI
Recommendations for Stay Cable Design Testing and Installation
Internal dampers required at lower end Damping required – 2.5% log dec – confirm by testing
Pier 13 General Arrangement
Typical Deck Section
Deck Section at Stay Anchorage
Typical Deck Section
Deck Section at Transition
Tower 8 Deck Segmentation
Tower 9, 10 and 11 Deck Segmentation
Tower 12 Deck Segmentation
Span 14 Deck Segmentation
Segments
Weights• 7.5' segments ≤ 140 tons• 8.5' segments ≤ 130 tons• Typical 10' segments ≤ 165 tons• 10 ' stay anchor segments ≤ 180 tons
Tower 8, 9, 10, and 11 Tendon Layout
Tendon Layout Span 14
Bottom Tendons – Span 14
Continuity Tendons Span 8
Typical Continuity Tendons
Continuity Tendons Spans 13 and 14
Typical Future PT
Typical Deck Segments
Typical Bulkhead
Typical Segment Reinforcing
Blisters
Transverse Deck PT
Belvederes
Belvederes - PT
Belvederes
Belvederes – Reinforcing
St Croix River CrossingS.P. 8221-82045
Contractor Information Meeting15 May 2013
River Span - Construction
Pier Table Construction
Pier Table Construction
Pier Table Construction
Global Construction Scheme
Deck Erection Pier 8
Segment Lifter
Max segment weight 180 tons Lifting frame weight 145 tons Stressing platform 17 tons Transporter 33 tons, 7 axles at 4'-3"
Segment Lifter
Deck Erection Pier 8
Deck Erection Pier 8
Deck Erection Pier 8
Deck Erection Pier 8
Deck Erection Pier 8
Deck Erection Pier 13 to East Abutment
Sequence Pier 13 to East Abutment
Deck Erection Pier 13 to East Abutment
Sequence Pier 13 to East Abutment
Sequence Pier 13 to East Abutment
Longitudinal Infill
Longitudinal Infill
Stay Strut Erection
Stay Strut Erection