totally precast concrete bridges
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Totally Precast Totally Precast Concrete Concrete BridgesBridges
FORWARD
Is it possible to Is it possible to
design an “Instant design an “Instant
Bridge?” Almost! Bridge?” Almost!
There are many There are many
ways to put a ways to put a
bridge together bridge together
quickly with quickly with
precast concrete precast concrete
products. products.
TOTALLY PRECAST BRIDGES -- CASE STUDIES
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The speed and The speed and
variety of precast variety of precast
prestressed prestressed
products and products and
methods give methods give
designers many designers many
options. Consider options. Consider
these advantages these advantages
of an of an
all-precast all-precast
bridge…bridge…
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Fast constructionFast construction benefits benefits owner agenciesowner agencies by reducing by reducing the duration of the work zone. the duration of the work zone. Fast construction reduces Fast construction reduces traffic handling costs and traffic handling costs and accident exposure risks. accident exposure risks. There’s less inconvenience to There’s less inconvenience to the traveling public, fewer the traveling public, fewer delays, and fewer motorist delays, and fewer motorist complaints. According to a complaints. According to a report by the Texas report by the Texas Transportation Institute, costs Transportation Institute, costs incurred by drivers passing incurred by drivers passing through a work zone (along through a work zone (along with engineering costs) can be with engineering costs) can be $10,000 to $20,000 per day. A $10,000 to $20,000 per day. A recent Federal report indicates recent Federal report indicates user costs of $50,000 per day user costs of $50,000 per day for work zones in urban areas. for work zones in urban areas.
Benefits to Owner Agencies:Benefits to Owner Agencies:
Reduction in the duration ofReduction in the duration ofwork zoneswork zones
Reduced traffic handling costsReduced traffic handling costs
Reduced accident exposure risksReduced accident exposure risks
Less inconvenience to theLess inconvenience to thetraveling publictraveling public
Fewer motorist complaintsFewer motorist complaints
TOTALLY PRECAST BRIDGES -- CASE STUDIES
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Contractors benefitContractors benefit
from reduced exposure from reduced exposure
to traffic hazards. to traffic hazards.
More work can be More work can be
accomplished in less accomplished in less
time, with fewer time, with fewer
weather delays. weather delays.
Costs are lower for Costs are lower for
forms, skilled field forms, skilled field
labor, scaffolding and labor, scaffolding and
shoring, and cranes.shoring, and cranes.
Benefits to Contractors:Benefits to Contractors:
Reduced exposure to hazardsReduced exposure to hazards
More work -- less timeMore work -- less time
Fewer weather delaysFewer weather delays
Lower costsLower costs
Less skilled laborLess skilled labor
TOTALLY PRECAST BRIDGES -- CASE STUDIES
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After foundations have After foundations have
been completed, been completed,
scheduling can be scheduling can be
controlledcontrolled by a single by a single
contractor working contractor working
with a familiar with a familiar
material. material.
Scheduling Control
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Precast concrete Precast concrete
structural elements structural elements
should always be plant should always be plant
produced under produced under
carefully controlled carefully controlled
conditions…by plants conditions…by plants
that are Certified by that are Certified by
PCI.PCI.
Plant-produced Elements
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… … so all structural so all structural
elements benefit from elements benefit from
the excellent the excellent quality quality
and corrosion and corrosion
resistanceresistance of of
prestressed concrete. prestressed concrete.
Quality and Corrosion Resistance
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Fully-cured precast Fully-cured precast
concrete structural concrete structural
elements can be elements can be
stockpiled in stockpiled in
advance of needadvance of need… …
Stockpiled in Advance
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……and can be and can be
scheduled for “just-in-scheduled for “just-in-
time”time” delivery and delivery and
erectionerection… …
Immediate Delivery and Erection
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There’s There’s no curing no curing
time time required at the required at the
jobsite, as with cast-in-jobsite, as with cast-in-
place concrete. Bridge place concrete. Bridge
piers can be erected in piers can be erected in
a day, and beams can a day, and beams can
follow immediately. follow immediately.
No Curing Time
TOTALLY PRECAST BRIDGES -- CASE STUDIES
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The following photos The following photos
illustrate the many illustrate the many
products and products and
construction methods construction methods
that enable very rapid that enable very rapid
project completion. In project completion. In
addition to the often-addition to the often-
used superstructure used superstructure
elements of girders elements of girders
and deck slabs, and deck slabs,
substructure substructure
components such as components such as
these piers can also be these piers can also be
precast. precast.
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Precast concrete piles Precast concrete piles
are quite popular in are quite popular in
much of the country. much of the country.
They come in different They come in different
sizes and shapes, sizes and shapes,
ranging from 10-inch ranging from 10-inch
square piles to 66-inch square piles to 66-inch
diameter hollow diameter hollow
cylinder piles. cylinder piles.
TOTALLY PRECAST BRIDGES -- CASE STUDIES
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Pile caps also can be Pile caps also can be
precast concrete, precast concrete,
reducing exposure, reducing exposure,
forming and curing informing and curing in
the field. the field.
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Piers can be made of Piers can be made of
precast concrete precast concrete
pieces quickly pieces quickly
assembled inassembled in
the field. the field.
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Abutments can also be Abutments can also be
made of precast. made of precast.
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The The Sucker Creek Sucker Creek
BridgeBridge in Hague, New in Hague, New
York, consists of York, consists of
precast concrete box precast concrete box
beams supported on beams supported on
precast concrete precast concrete
abutments assembled abutments assembled
into a jointless, rigid into a jointless, rigid
frame.frame.
Sucker Creek Bridge in Sucker Creek Bridge in
HagueHague
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In San Juan, Puerto In San Juan, Puerto
Rico, the totally Rico, the totally
precast concrete precast concrete
Baldorioty de Castro Baldorioty de Castro
AvenueAvenue bridges bridges were were
built in record-setting built in record-setting
time, attractively, and time, attractively, and
economically.economically.
Puerto Rico
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Each of four bridges, Each of four bridges,
ranging in length from ranging in length from
700 to 900 feet, was 700 to 900 feet, was
erected in about 24 erected in about 24
hours. This was well hours. This was well
within the owner’s within the owner’s
construction allowance construction allowance
of 72 hours per bridge, of 72 hours per bridge,
a condition established a condition established
to minimize disruption to minimize disruption
to one of the city’s to one of the city’s
highly traveled highly traveled
corridors. corridors. Puerto Rico -A totallyprecast bridge
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In addition to speed, In addition to speed,
the bridges also met the bridges also met
the city’s budgetary the city’s budgetary
needs. The four box-needs. The four box-
beam bridges were beam bridges were
constructed for $2 constructed for $2
million less than the million less than the
next lowest bid for next lowest bid for
another material. another material.
Puerto Rico
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Totally precast bridge Totally precast bridge systems may be the only systems may be the only viable solution in harsh viable solution in harsh field conditions. field conditions.
The The Confederation BridgeConfederation Bridge connecting Canada’s connecting Canada’s Prince Edward Island to Prince Edward Island to mainland New Brunswick mainland New Brunswick is such is such an example. an example.
The bridge spanned the The bridge spanned the eight-mile-wide eight-mile-wide Northumberland strait, Northumberland strait, which experiences severe which experiences severe winters and is covered winters and is covered with ice floes for five with ice floes for five months of the year.months of the year.
Confederation BridgeNew Brunswick, Canada
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Even in such harsh Even in such harsh
conditions, precast conditions, precast
concrete was able to concrete was able to
meet the owner’s meet the owner’s
requirements of a requirements of a
100-year service life, 100-year service life,
a 3½-year construction a 3½-year construction
period, and period, and
attractiveness.attractiveness.
Confederation Bridge
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It just makes economic It just makes economic
sense to evaluate sense to evaluate
conversion of cast-in-conversion of cast-in-
place to precast place to precast
concrete. This was concrete. This was
done for the done for the Edison Edison
BridgeBridge in Florida. in Florida.
Precast piers and Precast piers and
beams were spliced to beams were spliced to
produce tall pier bents.produce tall pier bents.
Edison BridgeFlorida
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The state of Texas has The state of Texas has constructed several constructed several bridges with segmental bridges with segmental precast concrete piers. precast concrete piers. The attractive piers and The attractive piers and pier caps are hollow pier caps are hollow members. Some are members. Some are made of high-made of high-performance concrete. performance concrete. Such segments may be Such segments may be match-cast, similar to match-cast, similar to segmental box girder segmental box girder bridges, or separated bridges, or separated by a thin mortar bed, by a thin mortar bed, much like giant much like giant masonry units.masonry units.Texas - Precast Piers
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In Houston, the In Houston, the Louetta Louetta
Road OverpassRoad Overpass utilized utilized
precast concrete precast concrete
match-cast piers, as match-cast piers, as
well as precast, well as precast,
prestressed U-beams prestressed U-beams
and stay-in-place deck and stay-in-place deck
panels.panels.
Louetta Road BridgeTexas
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Another famous bridge Another famous bridge
is the is the Sunshine Skyway Sunshine Skyway
BridgeBridge over Tampa Bay over Tampa Bay
in Florida. The piles, in Florida. The piles,
piers and pier caps piers and pier caps
were constructed of were constructed of
precast concrete precast concrete
elements connected elements connected
together with post-together with post-
tensioning threadbars.tensioning threadbars.
Sunshine Skyway BridgeFlorida
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Thank You for Your
Attention
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