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2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
ACCELERATED BRIDGE CONSTRUCTIONGraham Bettis, P.E.
TxDOT Bridge Division
2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
Accelerated Bridge Construction
What we’ve done.
What we’re doing.
What we plan to do.
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2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
What We’ve Done
Lateral Slide-In – LP 345 in San Antonio
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Prefabricated Elements
Decked
Slab
Beams
2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
Full-Width, Full-Depth Deck Panels
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2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
Full Width, Full Depth Panels – FM 413 @ Brazos River
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Bid July 2017 for
$3.5M
ABC Duration:
31 working days
Traditional
Approach:
96 working days
2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
Modular Units - Expanding West Dallas St. Concept
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2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
Dallas Rapid Replacement
IH 20 EB & WB at Houston School Rd and IH 635 NB & SB at Seagoville Rd
Accelerated Construction Estimate: $7.9M.
– One weekend closure per bridge plus phased approach slab work and
deck grinding.
Traditional Construction Estimate: $11.8M.
– Four months per bridge.
That’s not the norm on cost. Typically ABC will cost significantly more in
terms of dollars but far less for user costs and impacts.
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2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
Dallas Rapid Replacement
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2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
Modular Units
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2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
Modular Units – I-93 Fast 14 in Boston
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2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
Decked Tx Girders – Conceptual Only
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2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
Two-Girder + Permanent Concrete Deck Form – Conceptual Only
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2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
Self Propelled Modular Transporters (SPMT)
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Photos Courtesy of Heavy Equipment Guide
2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
SPMT – Fort Worth West 7th Street Arches
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2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
Lateral Slide-in
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2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
Accelerated Bridge Construction Considerations
Engage prime contractors and fabricators early and often.
Remain open to alternate concepts.
Ensure that concept is feasible, but do not design in any more methodology
than needed.
Just because a concept has worked well in other areas of the country does
not necessarily mean we can jump right in.
– Lightweight concrete.
– Ultra-high performance concrete.
– Fabrication: plant vs. jobsite, combining steel and concrete elements.
Consider user costs and impact when weighing accelerated vs. traditional
construction methods.
Extended phased construction and traffic control can equal significant cost.
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2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
QUESTIONS?Paul Eley – TxDOT Houston District, [email protected], (281) 319-6403
Graham Bettis – TxDOT Bridge Division, [email protected], (512) 416-2526
2017 Transportation Short Course – Accelerated Bridge Construction October 11, 2017
Copyright Notice
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