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Methods for Removing Concrete Decks from Bridge Girders

Methods for Removing Concrete Decks from Bridge Girders

Methods for Removing Concrete Decks from Bridge Girders ...

methods for concrete deck removal that preserve bridge superstructures and substructures. Research Methodology • Review literature about removing concrete

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Methods for Removing Concrete Decks from Bridge Girders ...

Methods for Removing Concrete Decks from Bridge Girders, TR-647 Abstract With ever tightening budgets and limitations of demolition equipment, states are looking for

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Methods for Removing Concrete Decks From Bridge Girders

Aug 01, 2014  Methods for Removing Concrete Decks From Bridge Girders Published Date: 2014-08-01. Language: English [PDF-7.48 MB] ... reliable, and sustainable methods for

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Methods for Removing Concrete Decks from Bridge Girders ...

With ever tightening budgets and limitations of demolition equipment, states are looking for cost-effective, reliable, and sustainable methods for removing

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Methods for removing concrete decks from bridge girders ...

Methods for removing concrete decks from bridge girders : [tech transfer summary]. Published Date: 2014-08-01. Language: English ... Methods for Removing Concrete

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Methods for Removing Concrete Decks from Bridge Girders ...

Jul 01, 2012  More efficient and reliable methods for concrete deck removal are needed. ... Methods for Removing Concrete Decks from Bridge Girders pdf, 176 KB Aug 2014

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Methods for removing concrete decks from steel girder bridges

Methods for removing concrete decks from steel girder bridges Hongtao Dang Iowa State University Follow this and additional works

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Girder/Deck Connection for Rapid Removal of Bridge Decks

for prestressed concrete bridge girders with composite cast-in-placedecks. The system utilizes the mechanical anchorage of concrete shear keys created on the top

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EVALUATING THE IMPACT OF DECK REMOVAL METHOD ON

thin top flange might be disadvantageous when it comes to deck removal, as it is more susceptible to damage. Therefore there is a need to investigate the impact of

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"Methods for Removing Concrete Decks from Bridge Girders ...

With ever tightening budgets and limitations of demolition equipment, states are looking for cost-effective, reliable, and sustainable methods for removing concrete decks from bridges. The goal of this research was to explore such methods. The research team conducted qualitative studies through a literature review, interviews, surveys, and workshops and performed small-scale trials and push ...

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Girder/Deck Connection for Rapid Removal of Bridge Decks

for prestressed concrete bridge girders with composite cast-in-placedecks. The system utilizes the mechanical anchorage of concrete shear keys created on the top flange of a concrete girder, combined with shear reinforcement crossing the interface. The system has the advantage of facilitating future deck removal, while protecting

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Methods for removing concrete decks from steel girder ...

Removing these decks without damaging the bridge superstructure is a tedious and expensive task that often controls the deck replacement timeline. With ever tightening budgets and limitations of demolition equipment, states are looking for cost-effective, reliable, and sustainable methods for removing concrete decks from steel girder bridges.

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Affordable Bridge Girder End Repair Method Restores ...

concrete degradation on the bridge and poor concrete in the bridge deck. During a 2013 repair, crews encountered two locations of severe beam deterioration. To repair these areas, MnDOT used a novel method developed in Michigan that involved removing deteriorated concrete and cleaning the area, placing steel reinforcement cages

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Affordable Bridge Girder End Repair Method Restores ...

Jul 18, 2018  Using this method, severely deteriorated beam ends can be repaired with reinforcement cages and shotcrete for $5,000 to $10,000. The alternative to this type of repair involves constructing a new beam, closing traffic, removing the bridge deck over the damaged beam as well as the beam itself, and recasting the bridge deck and barrier—an ...

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Evaluating the Impact of Bridge-Deck Removal on the ...

Jun 03, 2016  Two methods, saw-cutting and jackhammering, were implemented on the Camp Creek Bridge over I-80 in Lancaster County, Nebraska, before demolition due to its functional obsolesces. Different saw-cutting and jackhammering techniques were performed for deck removal between girders and on top of girder flange. Also, two girders from the bridge were ...

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Bridge Deck Construction Manual - Caltrans

Figure 2.1-1 Typical Deck Form Support for a Concrete Box Girder Bridge 2-1 Figure 2.1-2 Typical Deck Sheathing Supports on a Concrete Box Girder Bridge 2-2 Figure 2.1-3 Stay-in-Place Metal Forming on a Precast Girder Bridge 2-3 Figure 2.1-4 Example of a Slab Bridge 2-4 Figure 2.1-5 Example of a Steel Girder Bridge 2-4

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CHAPTER 2: BRIDGE DECK FORMS

deck, soffits of slab bridges, deck soffits for T-beam, steel girder, precast concrete girder bridges, and deck overhangs for all bridge types. In slab bridges, the plywood soffit forms are directly attached to and supported by the falsework joists or stringers and are considered an integral part of the falsework system (see Falsework Manual).

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Precast, Prestress Bridge Girder Design Example

The basic girder section properties are in the bridge description. 3.3.1 Effective Flange Width The effective flange width of a composite concrete deck slab

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GUIDE TO RECOMMENDED PRACTICE FOR THE REPAIR OF

Guide - 5 1 INTRODUCTION Throughout this Guide, commentary and reference to the supporting NCHRP 20-07 Task 307 Final Report (referred to as the Report) are made by section number in square brackets. This Guide serves to update the 1985 NCHRP Report 280: Guidelines for Evaluation and Repair of Prestressed Concrete Bridge Members.This report remains a primary reference for this topic.

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Bridge Deck Removal using Concrete Cutting for Demolition ...

This video demonstrates the process of removing a bridge deck using concrete cutting as a precision means of demolition. The work was done on Greenwood Avenu...

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"Evaluating the Impact of Bridge Deck Removal Method on ...

In this thesis, two deck removal methods are presented: saw cutting and jack hammering. The two methods were implemented on the Camp Creek Bridge over I-80 in Lancaster County, NE before demolition due to its functional obsolesces. Different saw cutting and jack hammering techniques were performed for deck removal between girders and on top of ...

get price

Experimental evaluation of overlays for precast concrete ...

overlay before or after placement of the precast concrete panels on the bridge girders. In concrete bridge decks constructed using accelerated bridge construction methods, leakage and chloride penetra-tion could occur at joints between precast concrete bridge-deck panels and at locations where cracking may already

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REINFORCEMENT-FREE DECKS USING A MODIFIED STRUT

24 strength of reinforcement-free bridge decks on concrete wide flange girders. The method could also 25 be applied to other short span restrained concrete slabs. The concept presented for the 26 reinforcement-free bridge deck includes a combination of removing steel reinforcement, utilizing

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"Evaluating the Impact of Bridge Deck Removal Method on ...

In this thesis, two deck removal methods are presented: saw cutting and jack hammering. The two methods were implemented on the Camp Creek Bridge over I-80 in Lancaster County, NE before demolition due to its functional obsolesces. Different saw cutting and jack hammering techniques were performed for deck removal between girders and on top of ...

get price

Bridge Deck Construction Manual - Caltrans

Figure 2.1-1 Typical Deck Form Support for a Concrete Box Girder Bridge 2-1 Figure 2.1-2 Typical Deck Sheathing Supports on a Concrete Box Girder Bridge 2-2 Figure 2.1-3 Stay-in-Place Metal Forming on a Precast Girder Bridge 2-3 Figure 2.1-4 Example of a Slab Bridge 2-4 Figure 2.1-5 Example of a Steel Girder Bridge 2-4

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RAPID REPLACEMENT OF BRIDGE DECKS Semantic Scholar

This report contains the findings of a study that was performed to evaluate existing rapid bridge deck replacement methods and to develop better procedures and new superstructure designs for future rapid deck replacement. The report provides a comprehensive description of the research, including the details of a continuous precast prestressed stay-in-place concrete system and girder-to-deck ...

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METHODS FOR STRENGTHENING REINFORCED CONCRETE

Many older reinforced concrete deck girder (RCDG) bridges contain straight-bar terminations of flexural reinforcement in flexural tension zones without special detailing. Common bridge design practice of the 1950s did not consider the additional demands on the terminated bars from shear and flexure.

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REPAIR OF DAMAGED PRESTRESSED CONCRETE GIRDER

Bridge Impact Data Nebraska 800 overhead bridges 10 impacts in past year United States 91,000 overhead bridges Approx. 1,100 impacts-Traditionally, damaged pre-stressed concrete girders are replaced. 2 •Costly •Major traffic delay •Cold joints on deck-Girder repair by splicing strands is

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EXAMPLE 6 - DECK DESIGN INCLUDING TYPE 10 MASH RAIL ...

Girder Spacing, maximum SGdr= 11.0 ft Number of girders NGdr= 4 ea Overall Deck width Wdeck= 43.0 ft Deck slab thickness tdeck= 8 in Overhang thickness (average) tOH = 9.67 in Concrete top cover cTop= 2.0 in AASHTO T 5.10.1-1 BDM 5.4.3 Concrete bottom cover cBot= 1.0 in AASHTO T 5.10.1-1 Wearing surface tWS = 3.0 in Concrete strength f'c= 4.5 ...

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SEPTEMBER 2018 LRFD BRIDGE DESIGN 9-1

Sep 25, 2018  SEPTEMBER 2018 LRFD BRIDGE DESIGN 9-1 Reinforced concrete decks on girders are the predominant type of deck used on highway bridges in Minnesota. The deck is the structural element that transfers vehicle and pedestrian loads to the girders. It is analyzed as a continuous beam with the girders acting as supports. The top and

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Experimental evaluation of overlays for precast concrete ...

overlay before or after placement of the precast concrete panels on the bridge girders. In concrete bridge decks constructed using accelerated bridge construction methods, leakage and chloride penetra-tion could occur at joints between precast concrete bridge-deck panels and at locations where cracking may already

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LRFD Design example for steel girder superstructure bridge ...

Sep 03, 2020  Concrete Deck Design Flowchart Equivalent Strip Method? (S4.6.2) Includes: Girder spacing Number of girders Top and bottom cover Concrete strength Reinforcing steel strength Concrete density Future wearing surface Concrete parapet properties Applicable load combinations Resistance factors Start Go to: A Obtain Design Criteria Design Step 2.1 ...

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Methods of bridge erection - IDEALS

Thedifficultyoferectingaplate-girder-bridgeob- viouslyincreaseswith thespan, and inthis discussion the methodsused in variousbridges willbe described inthe order

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US6904636B2 - Deck-to-girder connections for precast or ...

A technique and apparatus for integrally connecting a precast or prefabricated deck to a girder. A connection structure and method for connecting a precast or prefabricated deck to a girder, makes it unnecessary to form shear pockets in the deck and to remove existing shear connectors already installed to the girder, and makes it possible to easily adjust an elevation of the deck and to obtain ...

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US7373683B2 - Construction method for prestressed concrete ...

A construction method for simple bridges or continuous bridges using prestressed concrete girder (PSC girder) and precast slabs (PSC slabs) where prestress is applied to the lower portion of the center of the girder. bridges of low clearance and long span are constructed by preventing a loss of prestress due to load of the slabs and relieving excessive compression force generated on the upper ...

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Aspire - Concrete Connections

This is a direct link to Methods for Removing Concrete Decks from Bridge Girders, a 2014 report that reviews advantages and disadvantages of various deck removal methods. Hydrodemolition is a concrete-removal technique highlighted in a Concrete Bridge Preservation article on page 41.

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Recommended Practice for Precast Prestressed Concrete ...

Precast and prestressed concrete composite bridge deck panels are used with cast-in-place concrete to provide a convenient and cost effective method of construction for concrete bridge decks. The panels are usually precast at a manufacturing plant. They are trucked to the bridge construction site and lifted by cranes onto concrete or steel girders.

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