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Structures

PBES Innovative Projects

Epping 13940

LocationMill Street over Lamprey River
StateNH
Completion DateAugust 24, 2004
Contact PersonPeter E. Stamnas, P.E.
New Hampshire Department of Transportation
Phone: (603) 271-2731
Email: pstamnas@dot.state.nh.us
Description

The 115' single span butted box precast elements were placed on an entirely precast substructure. Nine precast footings pieces were leveled using leveling screws and then grouted in place. Full moment connections were created between wing and abutment stems to precast footings by means of grouted splice sleeves. The connections were cured overnight, , the substructure was backfilled and the butted box beams were placed. The joints between beams were grouted and transversely post-tensioned. Finally, the deck surface was membraned and paved, and rail was placed. It took less than eight days from the time the first precast footing was lifted from the trailer to the time when the bridge was opened to traffic.

The contract included a 14 day requirement to open bridge to traffic with an incentive/disincentive of $5,000/day. The contractor received a $30,000 incentive bonus.

Photoprecast footings, in place. Click for larger version precast abutment stem and wings erected. Click for larger version precast butted box beams placed on precast abutment stem during erection. Click for larger version completed structure. Click for larger version Offset joints - stem and footing. Click for larger version Grouted splice sleeves and grout gaps to allow grout to flow. Click for larger version
Prefabricated ElementsFootings, wings, abutment stems, and beams, substructures
Other KeywordsPrecast prestressed box beams, speed of construction,total substructure prefabrication
AdvantagesRapid assembly time may preclude the need for a detour., traffic disruption

Events

More Information

Contact

Vasant Mistry
Office of Bridge Technology
202-366-4599
E-mail Vasant

 
 
This page last modified on 05/12/08
 

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