precast segmental concrete bridges a
TRANSCRIPT
Arthur Palmer, Parsons Brinckerhoff
A 2007 pictorial review of a precast segmental yard setup
Topics � Overview of Tukwila Link Light Rail Project � Cashmere Casting Yard
� Casting Yard Layout � Geometry Control Basics � Daily Operations
� Span-‐by-‐Span -‐ Typical Segment Casting � Span-‐by-‐Span -‐ Pier Segment Casting � Balanced Cantilever -‐ Segment Casting
� Storage Yard � Shipping � Site Erection � Other Segmental Projects � Other Casting Yards
Arthur Palmer, Parsons Brinckerhoff
Tukwila Link Light Rail
� Owner: Sound Transit Authority � Design Engineer: Hatch Mott MacDonald � Bridge Designer: International Bridge Technologies � Construction Manager: Parsons Brinckerhoff Construction Services
� Contractor: PCL Civil Constructors, Inc. � Construction Engineer: T.Y. Lin International � Precaster: Bethlehem Construction � Post-‐Tensioning Supplier: Schwager Davis, Inc.
Arthur Palmer, Parsons Brinckerhoff
Types of Precast Segmental Construc;on � Span-‐by-‐Span Construction
� Majority Are 120’ Simple Span Structures � All Precast Concrete Components
� Balanced Cantilever Construction � Multi-‐Span Structures � CIP Main Piers � Remaining Components are Precast Concrete
Arthur Palmer, Parsons Brinckerhoff
Cas;ng Yard Layout
Arthur Palmer, Parsons Brinckerhoff
(5) Typical Matchcasting Forms (5) Typical Rebar Jigs (2) Pier Matchcasting Forms (2) Pier Rebar Jigs (2) Balanced Cantilever Matchcasting Forms (2) Balanced Cantilever Rebar Jigs
Matchcast Forms & Rebar Jigs
Arthur Palmer, Parsons Brinckerhoff
Arthur Palmer, Parsons Brinckerhoff
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Pier Segments & Rebar Jigs
Arthur Palmer, Parsons Brinckerhoff
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Balanced Cantilever Segments & Rebar Jigs
Arthur Palmer, Parsons Brinckerhoff
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Typical Casting
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Pier Casting
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Balanced Cantilever Casting
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