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Accelerated Bridge Construction Bridges With Concrete Segmental FIGG William R. (Randy) Cox, P.E. American Segmental Bridge Institute

FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

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Page 1: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Accelerated Bridge

Construction Bridges With Concrete Segmental

FIGG

William R. (Randy) Cox, P.E. American Segmental Bridge Institute

Page 2: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Outline

• Introduction • Precast Segmental Bridges ˗ Balanced Cantilever ˗ Span-by-Span ˗ Substructure

• Connections ˗ PTI/ASBI Grouted Post-Tensioning Specification

• Conclusions

Page 3: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

• Redundancy • Overload Capacity • Insensitive to Fatigue • Fire Resistance • Deflection Control • Durability

ADVANTAGES OF CONCRETE SEGMENTAL

BRIDGES

Introduction

McNary Bergeron

Presenter
Presentation Notes
Redundancy: There are multiple external tendons inside the box. Top slab contains multiple transverse tendons and for cantilever construction, many longitudinal tendons. Overload Capacity: For many segmental structures, the construction loads are the heaviest. Insensitive to Fatigue: This type of structure is deadload predominate. Fire Resistance: Main load carrying tendons are inside the concrete box. Durability: High quality concrete is used. Also, 2 way post-tensioning provides a crack free structure.
Page 4: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Precast Balanced Cantilever Construction

Page 5: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Four Bears Bridge Ft. Berthold Indian Reservation,

North Dakota

Opened September 2005 4,500’ Bridge

FIGG

Presenter
Presentation Notes
Typical span length = 318’ Bridge utilizes an integral wearing surface. The top slab is cast with extra clear cover and then grinding is used to produce ride quality. If the deck becomes contaminated with chlorides from the environment or from use of deicing chemicals, the extra cover can be removed and an overlay applied. Why precast? The construction is seasonal due to extreme winter conditions, however casting can occur year round in enclosed work areas. Erection was performed during summer months.
Page 6: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Superstructure Precasting

482 superstructure segments

Casting yard near one end of the bridge

Indoor casting facility

FIGG

Page 7: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Casting Operations Prefabricated reinforcing cage placed in segment form

FIGG

Presenter
Presentation Notes
Prefabrication of the reinforcing steel cage expedites the casting operation. Epoxy coated reinforcement was used to increase durability.
Page 8: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Casting Operations Concrete placement using overhead crane and bucket

FIGG

Presenter
Presentation Notes
Left photo: The “wet cast” segment is on the left and is prepared and ready for concrete placement. The “match cast” segment is on the right. The geometry of the bridge is controlled by adjusting the alignment of the match cast segment. A bond breaker is used on the face of the match cast segment to facilitate separation of the segments. Right photo: Concrete placement of the wet cast segment. Segment fabrication was performed inside a building and allowed casting year round and during inclement weather, resulting in the production of high quality product.
Page 9: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Casting Operations Segment move to storage FIGG

Presenter
Presentation Notes
Cast segments are moved to a finishing station and the transported to storage. Segments are stored using 3 point supports to reduce warping and distortion.
Page 10: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Segment Transport FIGG

Presenter
Presentation Notes
Segments are loaded in the storage area and transported to a barge for erection. Because of the limited seasonal window for site work, total precast construction was utilized – note the precast footing shells in the right photo.
Page 11: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Segment Delivery FIGG

Presenter
Presentation Notes
Left photo: Loading segments on barge. Right photo: Barging segments to erection location.
Page 12: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Pier Table Erection FIGG

Presenter
Presentation Notes
Erection of pier table using cranes. Segments are sized based on equipment capacity. Temporary shoring is used to reduce loads into the column.
Page 13: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Typical Segment Erection FIGG

Presenter
Presentation Notes
Cantilever segment is lifted into position by beam and winch. The segment faces are coated with epoxy and then pulled together using temporary post-tensioning. Cantilever tendons are then installed and stressed. This process is repeated until the full cantilevers are completed.
Page 14: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Typical Closure Joint FIGG

Presenter
Presentation Notes
The closure is completed by aligning the cantilever ends, installing forms, reinforcing steel, and concrete. Continuity post-tensioning is then installed and stressed.
Page 15: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Construction Rate

Typica l Erec tion of 4 to 6 s egments per day

(40’ - 60’) Four Bears Bridge : 10 Segments (100’) e rec ted in 1 day maximum Entire 316’ s pan in 9 days

FIGG

Page 16: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Four Bears Bridge Ft. Berthold Indian Reservation,

North Dakota FIGG

Page 17: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Balanced Cantilever Erection

Segments Can Be Erected using: • Barge-mounted cranes • Ground based cranes • Beam and Winch on cantilever end • Overhead Gantry

FIGG

Page 18: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

New I-35W Bridge Minneapolis, Minnesota Opened in Sept 2008

1,214’ long, 504’ Mainspan FIGG

Presenter
Presentation Notes
This bridge utilizes an integral wearing surface.
Page 19: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Superstructure Precasting

1

Long Line Method

FIGG

Presenter
Presentation Notes
Long-line precasting for I35W project on closed main lanes of highway. Forms are set for entire span and segments are cast in sequential order. Segments are then separated and placed in storage.
Page 20: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

New I-35W Bridge Minneapolis, Minnesota

120 segments placed in 47 days NTP to close of main span was 9 months

FIGG

Page 21: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Victory Bridge over Raritan River Sayreville, New Jersey

Opened in 2005 Twin 3,971’ Bridges

FIGG

Presenter
Presentation Notes
Typical approach span length = 150’ Main navigation span length = 440’ Bridge has an integral wearing surface. First of twin structure was opened 15 months after award of project. Second was opened 9 months later.
Page 22: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Rt. 36 Highlands Bridge New Jersey

McNary Bergeron

Opened in 2010 Twin 1600’ Bridges

Presenter
Presentation Notes
Precast construction was used from the footing up. Reason for precast construction: short construction season. Reason for segmental: Owner desire for durability in a marine environment.
Page 23: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Precast Span-By-Span Superstructure Construction

Page 24: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Susquehanna River Bridge Near Harrisburg, Pennsylvania

November 2004 - NTP Open in May 2007 - 5,910’ Twin Bridges

FIGG

Presenter
Presentation Notes
Typical span length = 150’ Bridge has an integral wearing surface. Concrete segmental was chosen for durability.
Page 25: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Casting Yard

Penn Turnpike Commission

Bridge

Precasting Susquehanna River Bridge

Near Harrisburg, Pennsylvania FIGG

Page 26: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

57’ – 1 ¾”

6’ 12’ 36’

8’- 8”

Typical Segment - Susquehanna

Maximum Length: 13 Feet Maximum Weight: 104 Tons

FIGG

Page 27: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Precasting – Susquehanna

1040 – Total Segments (958 Typical, 82 Pier)

3 - Typical Casting Cells

1 - Specialty Casting Cell

FIGG

Page 28: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Precasting – Susquehanna Casting Bed

Core Form – easily inserted and withdrawn

FIGG

Page 29: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Precasting – Susquehanna Casting Yard

Match Cast Segment Wet Cast Segment

FIGG

Presenter
Presentation Notes
Short Line Casting Method
Page 30: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Casting Bed Transverse PT in Deck FIGG

Presenter
Presentation Notes
The durability of the deck is greatly enhanced because the top slab is post-tensioned in 2 directions. Note the use of plastic ducts in the transverse direction.
Page 31: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Casting Yard Storage FIGG

Page 32: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Superstructure Erection Susquehanna River Bridge Near Harrisburg, Pennsylvania FIGG

Page 33: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Superstructure Erection Susquehanna River Bridge Near Harrisburg, Pennsylvania FIGG

Presenter
Presentation Notes
Bridge was erected from above because the water depth limited the use of barges. Also, the bridge crosses a rail line.
Page 34: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Superstructure Erection Susquehanna River Bridge Near Harrisburg, Pennsylvania FIGG

Page 35: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Superstructure Erection Susquehanna River Bridge Near Harrisburg, Pennsylvania FIGG

Page 36: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Superstructure Erection Susquehanna River Bridge Near Harrisburg, Pennsylvania

FIGG

Presenter
Presentation Notes
Left photo: Epoxy is applied to both segment faces to seal the joint from moisture intrusion. Right photo: Each span has 2 closure pours.
Page 37: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Superstructure Erection Susquehanna River Bridge Near Harrisburg, Pennsylvania FIGG

Presenter
Presentation Notes
Post-Tensioning Layout: Main tendons are external to the box. Note blisters used for temporary post-tensioning. Also, extra openings are provided for future post-tensioning, if needed. Utilities are contained on the inside of the box.
Page 38: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Superstructure Erection Susquehanna River Bridge Near Harrisburg, Pennsylvania FIGG

Presenter
Presentation Notes
Post-tensioning at pier. Note galvanized pipes for continuity tendons. Also, extra bearing plate for future PT.
Page 39: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Erected Rate - 3 Days Per Span

Susquehanna River Bridge Near Harrisburg, Pennsylvania

FIGG

Page 40: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Susquehanna River Bridge Near Harrisburg, Pennsylvania FIGG

Page 41: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Garcon Point Bridge Pensacola, Florida

Opened in May 1999 18,425’ Bridge

FIGG

Presenter
Presentation Notes
Typical span length = 140’ Main navigation span length = 225’
Page 42: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Garcon Point Bridge Pensacola, Florida

FIGG

Presenter
Presentation Notes
Project remains as record holder for span-by-span erection.
Page 43: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Selmon Expressway Tampa, Florida Opened July 2006

FIGG

Presenter
Presentation Notes
Typical span length = 142’ Maximum span = 156’ Maximum rate of erection was 2400 LF in a month.
Page 44: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Selmon Expressway Tampa, Florida

“Feeling: George Jetson. For real. By the time I’m at my destination, it’s been 12 minutes suburb to city. They charge a dollar for toll. It should cost two.” Ben Montgomery, Reporter, St. Petersburg Times, July 19, 2006 (opening day)

“It’s probably the best thing that’s ever happened here... There’s no way I’d get there as fast as I do without it.” LaSchael Parks, Commuter, Tampa Tribune, July 16, 2007 (1 year after opening)

FIGG

Presenter
Presentation Notes
Reversible lanes provide additional capacity during commutes in and out of city.
Page 45: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Span-by-Span Erection

Segments Can Be Erected using:

• Under Slung Truss

• Overhead Gantry

Segment Delivery can be from above

or below.

FIGG

Page 46: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Precast Segmental Substructures

Page 47: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Victory Bridge over Raritan River

Sayreville, New Jersey Opened in 2005 Twin 3,971’ Bridges

FIGG

Presenter
Presentation Notes
Precast piers were used.
Page 48: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Precast Substructure First segment cast 6 weeks after NTP

Victory Bridge over Raritan River Sayreville, New Jersey

FIGG

Presenter
Presentation Notes
Left photo: Prefabrication of reinforcement
Page 49: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Victory Bridge over Raritan River

Sayreville, New Jersey Precast Substructure

FIGG

Presenter
Presentation Notes
Short line casting in vertical direction
Page 50: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Victory Bridge over Raritan River

Sayreville, New Jersey Typical Precast Pier Details

FIGG

Presenter
Presentation Notes
Details of looped tendons.
Page 51: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Victory Bridge over Raritan River Sayreville, New Jersey

Precast Pier Erection

FIGG

Presenter
Presentation Notes
Right photo: Starter segment positioned and grouted in correct alignment.
Page 52: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Victory Bridge over Raritan River Sayreville, New Jersey

Precast Pier Erection

FIGG

Page 53: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Victory Bridge over Raritan River Sayreville, New Jersey

Precast Pier Erection

FIGG

Presenter
Presentation Notes
Epoxy is applied to segment faces as a seal. Temporary post-tensioning is then stressed to squeeze out excess epoxy.
Page 54: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Victory Bridge over Raritan River Sayreville, New Jersey

Precast Pier Erection

FIGG

Presenter
Presentation Notes
Pier cap is placed, PT installed and tendons stressed to complete erection.
Page 55: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Completed Precast Piers 100’ tall piers erected in one day

FIGG

Page 56: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Rt. 36 Highlands Bridge New Jersey Precast Cofferdam

McNary Bergeron

Presenter
Presentation Notes
Casting location for precast cofferdams.
Page 57: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Rt. 36 Highlands Bridge New Jersey Precast Cofferdam

McNary Bergeron

Presenter
Presentation Notes
Left photo: reinforcing steel is installed and concrete placed in precast shell. Right photo: Precast pier segments installed.
Page 58: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Pier Table Erection McNary Bergeron

Precast Pier Shells

Presenter
Presentation Notes
The use of precast shell pier tables reduce hauling weight and provide an integral connection between the column and superstructure – very important in seismic locations.
Page 59: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Precast Pier Shells

McNary Bergeron

Pier Table Erection

Page 60: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Connections

Page 61: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

PTI / ASBI Grouted Post-Tensioning Specifications

Presenter
Presentation Notes
Post-Tensioning is used for many ABC applications. PTI and ASBI have developed specifications for grouted post-tensioning.
Page 62: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

The Joint Task Group

Designers , Contractors, Suppliers, Academia, Owners

http://www.dot.ca.gov/�
http://www.ufl.edu/�
http://www.pbworld.com/default.asp�
http://www.dot.state.mn.us/�
Page 63: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Why Do We Need a Grouted Post-Tensioning Specification?

• To Create a Uniform Standard for the Application of

Grouted Post-Tensioning

• To Create Uniform Acceptance Standards for Post-Tensioning Systems

Page 64: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Specification Highlights

• Designer establishes PT System Protection Level • Quality Assurance and Quality Control Requirements • Personnel Qualifications • Grouting Operations

Page 65: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Personnel Training

Post-Tensioning Institute • Level 1 Bonded PT – Field Installation • Level 2 Bonded PT Field Specialist

American Segmental Bridge Institute • Certified Grouting Technician

Information: www.post-tensioning.org www.asbi-assoc.org

http://www.post-tensioning.org/�
http://www.asbi-assoc.org/�
Page 66: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

Conclusions

• Reduced Construction Time • Environmental Protection • Maintain Traffic • Provide Aesthetics • Local Labor and Materials • Quality Control • Minimum Maintenance • Reduced Cost

FIGG

Precast Concrete Segmental Bridges Advantages:

Page 67: FIGG Accelerated Bridges...2013/08/22  · Casting Yard Match Cast Segment Wet Cast Segment FIGG Short Line Casting Method Casting Bed Transverse PT in Deck FIGG The durability of

142 Cimarron Park Loop, Suite F Buda, TX 78610-2837

512.523.8214 Fax: 512.523.8213

www.asbi-assoc.org [email protected]

Questions?


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