Innovative Bridge Designs for Rapid Renewal Toolkit (2012) / Chapter Skim
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Pages 287-309
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From page 287... ...
285 D RECOMMENDED ABC CONSTRUCTION SPECIFICATIONS XX SPECIAL REQUIREMENTS FOR PREFABRICATED ELEMENTS AND SYSTEMS FOR ACCELERATED BRIDGE CONSTRUCTION Table of Contents XX.1 GENERAL XX.1.1 Description XX.1.2 Benefi ts XX.2 RESPONSIBILITIES XX.2.1 Design XX.2.2 Construction XX.2.3 Inspection XX.3 MATERIALS XX.3.1 Description XX.3.2 Concrete XX.3.3 Steel XX.3.4 Closure Pours XX.3.5 Grout XX.3.6 Couplers XX.4 FABRICATION XX.4.1 Qualifi cations of the Fabricator XX.4.2 Fabrication Plants XX.4.3 Fabrication Requirements XX.4.4 Fabrication Tolerances XX.4.5 Yard Assembly
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From page 288... ...
286 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT XX.5 SUBMITTALS XX.5.1 Shop Drawings XX.5.2 Assembly Plan XX.6 QUALITY ASSURANCE XX.7 HANDLING, STORING, AND TRANSPORTATION XX.8 GEOMETRY CONTROL XX.8.1 General XX.8.2 Camber and Deflection XX.8.3 Equalizing Differential Camber XX.8.4 Finishing of Bridge Deck XX.8.4.1 Diamond Grind Bridge Deck XX.8.4.2 Saw Cut Groove Texture Finish XX.9 CONNECTIONS XX.9.1 Requirements for UHPC Joints in Decks XX.9.2 Requirements for Mechanical Grouted Splices XX.9.3 Requirements for Post-Tensioned Connections XX. 9.4 Requirements for Bolted Connections XX.10 ERECTION METHODS XX.11 ERECTION PROCEDURES XX.11.1 General Requirements for Installation of Precast Elements and Systems XX.11.2 General Procedure for Superstructure Modules XX.11.3 General Procedure for Pier Columns and Caps XX.11.4 General Procedure for Abutment Stem and Wingwalls (supported on piles)
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From page 289... ...
287 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT XX.1 GENERAL XX.1.1 Description This specification for prefabricated elements and modular systems for Accelerated Bridge Construction (ABC) supplements the requirements of the LRFD Construction Specifications.
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From page 290... ...
288 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT should also consider construction loading, including a feasible means of construction. Special design consideration should therefore be given to loading due to construction conditions such as transportation, support on blocking, and unique (one-time)
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From page 291... ...
289 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT one feasible method of erection. Such measures are needed to assure contractors will have a set of constructable plans that can be built in the designated time frames specified in the contract documents at bid time.
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From page 292... ...
290 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT MATERIAL Ultra High Performance Concrete (UHPC)
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From page 293... ...
291 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT XX.4.2 Fabrication Plants All manufacturing plants/casting facilities shall satisfy the following minimum requirements: 1. Plant Casting The precast concrete manufacturing plant used for the prefabrication of prestressed concrete elements shall be certified by the Prestressed Concrete Institute Plant Certification Program.
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From page 294... ...
292 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT c. When accelerated heat is used to obtain temperatures above 100°F, record the temperature of the interior of the concrete using a system capable of automatically producing a temperature record at intervals of no more than 15 minutes during the curing period.
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From page 295... ...
293 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT Finish the precast elements according to Section 8.10 of the LRFD Bridge Construction Specifications. Decked girder systems shall be supported at the bearing points during deck casting operations and storage.
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From page 296... ...
294 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT XX.5 SUBMITTALS The submittals requiring written approval from the Engineer are as follows: XX.5.1 Shop Drawings The Contractor shall prepare and submit shop details, and all other necessary working drawings for approval in accordance with the requirements of project specifications. The Contractor shall submit six copies of the shop drawings for approval.
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From page 297... ...
295 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT • Details of all equipment that will be employed for the assembly of the superstructure, substructure and approach slabs. • Details of all equipment to be used to lift modules including cranes, excavators, lifting slings, sling hooks, jacks, etc.
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From page 298... ...
296 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT the opinion of the Inspectors the members were fabricated from accepted materials and processes and loaded for shipment in accordance with the contract requirements. The Inspector's stamp of acceptance for shipment does not imply that the members will not be rejected by the Engineer if subsequently found to be defective.
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From page 299... ...
297 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT 7. The plant (or fabricator)
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From page 300... ...
298 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT 4. Safety The contractor shall be responsible for the safety and stability of prefabricated elements during all stages of handling, transportation and construction.
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From page 301... ...
299 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT 6. Transportation Minimum compressive strength prior to moving unit shall be 4,500 psi or as provided in the project plans or specifications.
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From page 302... ...
300 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT monitored. Cure time should not vary, which may inadvertently occur if only some of the girders are permitted an extended curing period.
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From page 303... ...
301 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT given to providing an additional thickness of ½ in. to permit correction of the deck profile by grinding, and to compensate for thickness loss due to abrasion.
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From page 304... ...
302 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT XX.9 CONNECTIONS XX.9.1 Requirements for UHPC Joints in Decks Prior to the initial placement of the UHPC, the Contractor shall arrange for an onsite meeting with the materials supplier representative and the Engineer. The Contractor's staff shall attend the site meeting.
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From page 305... ...
303 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT Submit the specification requirements for the grout including required strength gain to develop the specified minimum yield strength of the connected reinforcing bar. XX.9.3 Requirements for Post-Tensioned (PT)
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From page 306... ...
304 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT • Access to erect structure may be challenging based on site conditions (adjacent rivers, steep grades, existing structures or other geometric constraints, etc.)
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From page 307... ...
305 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT SPMTs have been particularly favored for removing the existing span moving the prefabricated superstructure from the staging area to its final position. SPMTs can also be adapted to install prefabricated deck and superstructure elements and modules from above where the use of land based cranes is not feasible.
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From page 308... ...
306 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT 6. Temporarily support, anchor, and brace all erected modules as necessary for stability and to resist wind or other loads until they are permanently secured to the structure.
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From page 309... ...
307 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT 6. Allow the grout in the coupler to cure until the coupler can resist 100% of the specified minimum yield strength of the bar prior to removal of bracing and proceeding with installation of elements above the element.
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