Date post: | 18-Jan-2016 |
Category: |
Documents |
Upload: | hilary-french |
View: | 218 times |
Download: | 0 times |
Danbro • Selected Data For Maps • Prioritizing / Ranking
Arne HenriksenNVF Annual Bridge Conference 2015
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
NVF Annual Bridge Conference 2015 2.
Overview of bridges – road clearanceFavrskov Municipality
NVF Annual Bridge Conference 2015 3.
Municipality limits under• Rail way bridges• Stats road bridgesRequire all bridges in one system
x
x
x
Clearance possibilities for a 4,00 m high truck
NVF Annual Bridge Conference 2015 4.
Overview of bridges – carrying capacityFavrskov Municipality
NVF Annual Bridge Conference 2015 5.
Span and load capacity
NVF Annual Bridge Conference 2015 6.
Load Limits (old map)Do not compare the load from the actual transport with the span width of the actual bridge
NVF Annual Bridge Conference 2015 7.
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
NVF Annual Bridge Conference 2015 8.
Map passage limits by using a web number
NVF Annual Bridge Conference 2015 9.
More structures on one location
NVF Annual Bridge Conference 2015 10.
If double icons the color for the bridge with lowest limits is shown first
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)
NVF Annual Bridge Conference 2015 11.
Prioritizing
Repair Projects
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
NVF Annual Bridge Conference 2015 13.
Prioritizing existing method• Special investigation form – deterioration rate
NVF Annual Bridge Conference 2015 14.
NVF Annual Bridge Conference 2015 15.
NVF Annual Bridge Conference 2015 16.
NVF Annual Bridge Conference 2015 17.
Load test to evaluate deck capacity
NVF Annual Bridge Conference 2015 18.
Load test to evaluate deck capacity
NVF Annual Bridge Conference 2015 19.
Capacity of edge beams
• Load tests as an alternative to new calculation
• None destructive test, easy to execute and repeat
NVF Annual Bridge Conference 2015 20.
Test of edge beam / railing
NVF Annual Bridge Conference 2015 21.
Defect waterproofing membrane
NVF Annual Bridge Conference 2015 22.
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
NVF Annual Bridge Conference 2015 23.
Service life definitions
NVF Annual Bridge Conference 2015 24.
ASR evaluation
NVF Annual Bridge Conference 2015 25.
ASR cracks
NVF Annual Bridge Conference 2015 26.
ASR special inspection
NVF Annual Bridge Conference 2015 27.
ASR indication
NVF Annual Bridge Conference 2015 28.
ASR indication
NVF Annual Bridge Conference 2015 29.
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
NVF Annual Bridge Conference 2015 30.
NVF Annual Bridge Conference 2015 31.
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
NVF Annual Bridge Conference 2015 32.
Thank You
Arne Henriksen