SHRP 2 R 04 ABC Modular Bridge Design and Construction

Report
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?

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