Danbro Selected Data For Maps Prioritizing / Ranking Arne Henriksen NVF Annual Bridge Conference...
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Transcript of Danbro Selected Data For Maps Prioritizing / Ranking Arne Henriksen NVF Annual Bridge Conference...
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Danbro • Selected Data For Maps • Prioritizing / Ranking
Arne HenriksenNVF Annual Bridge Conference 2015
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New Digital MapsPurpose
Administration will be less expensive and easier (80%)
Better access to data (Online)
New data available for administrator, police and road user
Bridge span will be compared with the actual truck load on the span
Time Schedule
• Maps will be available at the end of this year
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Overview of bridges – road clearanceFavrskov Municipality
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Municipality limits under• Rail way bridges• Stats road bridgesRequire all bridges in one system
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Clearance possibilities for a 4,00 m high truck
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Overview of bridges – carrying capacityFavrskov Municipality
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Span and load capacity
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Load Limits (old map)Do not compare the load from the actual transport with the span width of the actual bridge
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Overview vehicle classificationWEB number
Diagram, Truck load,
various span widths
Data for one specific truck/load
(one WEB number)
Combine Danbro data with vehicle
Classification system
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Map passage limits by using a web number
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More structures on one location
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If double icons the color for the bridge with lowest limits is shown first
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Road Authorities / Bridge Administrators• Municipalities
• Railways (are responsible for many road bridges in Denmark)
• Road Directorate
How to get information on the map
• Structures have to be registered in Danbro
• Clearance, span width and load capacity must be updated
as soon as changes takes place.
Responsibility
• All info approved and controlled by the
• Road Administrator (Clearance)
• Bridge Administrator (Load capacity)
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Prioritizing
Repair Projects
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Prioritizing repair projects
• Existing method
a) Net present value
b) Evaluation
• Load capacity of bridge deck
• Load capacity of edge beam
• Defect waterproofing layer
• Chloride influence
• ASR influence
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Prioritizing existing method• Special investigation form – deterioration rate
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Load test to evaluate deck capacity
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Load test to evaluate deck capacity
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Capacity of edge beams
• Load tests as an alternative to new calculation
• None destructive test, easy to execute and repeat
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Test of edge beam / railing
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Defect waterproofing membrane
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Chloride evaluation• 100% increase of CL contact
• Repair need after few decades
• Uniform way to describe
• Results
• Estimate repair need and year
Bridge with and without isolating membrane
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Service life definitions
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ASR evaluation
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ASR cracks
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ASR special inspection
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ASR indication
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ASR indication
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New Considerations• Let the elements deteriorate and change it (20 years later)
• Use better methods to minimize road user costs
• Better guidelines how to report and describe repair need
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New considerations -New strategies for repair projects• Consultants often dramatizes deterioration rate
• Use DanbroPrincipal inspections and special inspections inclusive photos may be traced long time back
• Take photos and describe critical damage better
• Nothing to obtain by repair now, means it is better to delay
• Take a critical look at estimated repair and future repair costs before a special inspection is accepted.
• High variation from consultants to consultant in estimating consequences from: ASR and Chloride impact
• After our latest findings we need to update our common specifications to evaluate these two areas
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Thank You
Arne Henriksen