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7/27/2019 Spliced Concrete Girder Projects
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ACEC/NCDOT Spliced Girder Workshop
Spliced Concrete Girder Pro jec ts
Con t inuous Spans
Bow River B r idge, AB
Main St. Viaduc t, Pueb lo , CO
Rosebank -Patik i In terchange, NZ
Palm Valley B ridge, FL
Moore Haven B ridge, FL
Rou te 33 Br idges, West Po int, VA
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ACEC/NCDOT Spliced Girder Workshop
Con t inuous Span Projects
Bow River Br idge, AB
Bu i l t in 2002
4 spans : 2 at 174 ft, 2 at 213 ft
One segment per span
211 ft beams weighed 268,000 lb.
Beams 9.2 ft deep w ith 6.9 in . web
11.65 ft beam spac ing
Very h igh l ive load requ irements
Concrete saved 10% over steel girders
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ACEC/NCDOT Spliced Girder Workshop
Bow River Br idge, AB
Longes t known s ing le
piece girders sh ipped
by tru ck at 211 ft long
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ACEC/NCDOT Spliced Girder Workshop
Con t inuous Span Projects
Main Street Viaduct, Pueb lo , CO
Bu i l t in 1995
734 ft sp l iced g irder struc ture
5 spans w ith 174 ft max. span
7 segments w i th 154 f t max.
72 in . deep g irder haunched to 96 in. over
2 piers End b lock sect ion used over 1 pier
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ACEC/NCDOT Spliced Girder Workshop
Con t inuous Span Projects
Main Street Viaduct, Pueb lo , CO
Erected on falsework & strongbacks
Spl iced to ach ieve greater spans w ith
restr ic ted p ier p lacement
Very t igh t schedu le and budget Aesthet ics, durab i l ity and low
maintenance costs were cons idered
8 Girders spaced at 10'-6"
Overal l deck w idth= 80'-0"
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ACEC/NCDOT Spliced Girder Workshop
Main Street Viaduct, Pueblo , CO
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ACEC/NCDOT Spliced Girder Workshop
Main Street Viaduct, Pueb lo , CO
Cons tant depth Weband th ickened Bot tom
Flange
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ACEC/NCDOT Spliced Girder Workshop
Main Street Viaduct, Pueblo , CO
Strongbacks at sp l ices
instead o f towers
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ACEC/NCDOT Spliced Girder Workshop
Main Street Viaduct, Pueblo , CO
7/27/2019 Spliced Concrete Girder Projects
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ACEC/NCDOT Spliced Girder Workshop
Rosebank-Patik i In terchange, NZ
Bu i l t in 1997
2 - 435 ft sp l iced g irder struc tu res
Curved ramps w i th 492 f t radius
4 spans w ith 138 ft max. span
6 segments w i th 2 pier segm ents
71 in . deep g irders
Integral cap to p rov ide con t inu i ty
between sub- and superstructu re
Con t inuous Span Projects
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ACEC/NCDOT Spliced Girder Workshop
Rosebank-Patik i In terchange, NZ
Spliced Unit
Pier
Segments
Splice at Pier
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ACEC/NCDOT Spliced Girder Workshop
Rosebank-Patik i In terchange, NZ
In tegral Cap Strongback
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ACEC/NCDOT Spliced Girder Workshop
Con t inuous Span Projects
Palm Valley B ridge, FL
Bu i l t in 2002
3 spans (210' 290' 210' = 710')
5 segments in each girder l ine
Designed as sp l iced g irder by
consul tant
Barge delivery o f segments
Erected on falsewo rk
Ful l -leng th post-tensioned
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ACEC/NCDOT Spliced Girder Workshop
Palm Valley B ridge, FL
Haunched p ier segmen t: Special forms & bed
fo r 15' depth
8" web fo r 3" diam . PT
ducts
Strut fo r pretens ionedstrands in top f lange
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ACEC/NCDOT Spliced Girder Workshop
Palm Valley B ridge, FL
Haunched p ier segment
- Variab le web dep th to 15' to tal depth at pier
- Bottom f lange depth var ies s l igh t ly
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ACEC/NCDOT Spliced Girder Workshop
Pier segments : 15' deep , 141' long , 125 tons
End segments : 81" deep , 139' long , 100 tons
Drop-in segment: 96" deep , 148' long , 103 tons
1'-0" f ield c losure pour between al l segments
Palm Valley B ridge, FL
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ACEC/NCDOT Spliced Girder Workshop
Palm Valley B ridge, FL
To maintain unobs tructed channel
Tempo rary towers in back spans
Strong-backs at sp l ices between segmen ts
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ACEC/NCDOT Spliced Girder Workshop
Con t inuous Span Projects
Moore Haven Bridge, FL
Bu i l t in 2000
3 spans w ith 320 ft max . (RECORD)
5 segments w i th 15 f t deep haunched
p ier segments
Barge delivery o f segments
Erected on falsewo rk
Spl iced g irder selected by contracto r
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ACEC/NCDOT Spliced Girder Workshop
Moore Haven Bridge, FL
3sp
anu
nit
320
'
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ACEC/NCDOT Spliced Girder Workshop
Con t inuous Span Projects
Route 33 Bridges , West Po in t, VA
2 br idges: Mattapon i and Pamunkey Rivers
Current ly under cons truct ion
Each br idge has two 4-span uni ts w i th
200'-240'-240'-200' spans
8 ft deep g irders haunched to 10'-6" deep
at piers
Barge delivery o f segments
Erected on falsework suppor ted by foo t ings
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ACEC/NCDOT Spliced Girder Workshop
Route 33 Bridges at West Poin t, VA
Seven segments to fo rm
the 4 spansGirders and decks are
l igh tweigh t concrete
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ACEC/NCDOT Spliced Girder Workshop
Route 33 Bridges at West Poin t, VA
Lightweigh t concrete bu lb tee girders f 'c= 8,000 psi w ith max. dens i ty o f 125 pcf
Ligh tweigh t conc rete deck f 'c= 5,000 psi w ith max. dens i ty o f 120 pcf
Ligh tweigh t concrete was used to reducefoundation loads
Est imated 10% reduct ion in p i les fo r
main p iers
A lso reduced foundation s ize
VTRC perform ing mater ial tests and observing
const ruc t ion
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ACEC/NCDOT Spliced Girder Workshop
NCHRP Report 517 comp leted October 2003 Download from
http:/ /gul l iver. trb.org/publ icat ions/nchrp/nchrp_rpt_517.pdf
Selected resu lts o f research
List o f Spl iced Girder B r idges
Design Examples
Proposed revis ions to LRFD
Specs
NCHRP Pro ject 12-57
Extend ing Span Ranges o f
Precast Pres tressed Concrete Girders
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ACEC/NCDOT Spliced Girder Workshop
In i t ial Find ings
Most des ign op t ions for extend ing spanranges invo lve incremen tal changes to
cu rrent design methods and mater ials
Design opt ions need to be ident i f ied
Add i tional design guidance no t requ i red
Spl iced girders provide sign i ficant ly
increased span ranges for p recast
prestressed conc rete gi rders
Info rmat ion is lack ing
Focus of mos t of the act iv ity in the study
Continue
http://group4.pdf/http://group4.pdf/http://group4.pdf/