SHRP 2 R 04 ABC Modular Bridge Design and Construction
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Transcript SHRP 2 R 04 ABC Modular Bridge Design and Construction
SHRP 2 - R04
ABC Demonstration Bridge
Design and Construction
AASHTO Committee on
Construction
San Francisco, CA
August 16, 2012
Iowa ABC Demonstration Project
Two Week Closure
US Highway 6
Bridge over Keg
Creek
6 miles east of Council
Bluffs, IA
Normal construction
duration 14-16 weeks
ABC construction
duration 14 days
Project
Innovations
Precast modular bridge system
(including precast approach pavement)
Superstructure units create a semiintegral abutment for rapid construction
Durable, moment-resisting UHPC joint
between deck panels
First bridge in US with full, momentresisting UHPC joint at the piers
UHPC
UHPC Constituents:
• Portland cement
• silica fume
• fine, uniformly graded sand
• crushed quartz
• steel fibers
• water
• superplasticizers
UHPC Particle Packing
1 2 3 4 5 6 7 8 9 10 11 12 13 14
14-Day
ABC
Timeline
Bridge
Farm
Concept
Precast
Abutments
and Piers
Superstructure
Modules
Deck Joint
Forming
Deck
Concrete
Placement
Drilled Shaft
Construction
Abutment
Details
Precast Abutment Construction
Single piece barrel section
SCC to fill pile pockets
Temporary support of backwall
until SCC reaches 3500 psi
SemiIntegral
Abutment
Abutment
Construction
SCC
Concrete
for
Abutments
Precast
Piers
Precast Pier
Connections
Column
Assembly
and
Bracing
Capbeam
Assembly
Modular
Superstructure
C
L Pier 1
Pier Joint
Detail
C
L Pier 2
PT Retrofit
for
Modules
Module
Transport
Module
Assembly
Module
Assembly
Deck Joint
Reinforcing
UHPC
Mixing
UHPC
Placement
FHWA/HFL
Workshop
SHRP 2 - R04
ABC Demonstration Bridge
Design and Construction
Questions?