CACCN Saskatchewan Chapter Fall Newsletter 2008 Saskatchewan
DISCLAIMER - University of Saskatchewan 2012/C_Prang.pdf · Transportation Research Centre...
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Transcript of DISCLAIMER - University of Saskatchewan 2012/C_Prang.pdf · Transportation Research Centre...
CE990 Graduate Seminar Presentations
DISCLAIMER
The presentation materials shown in this file were prepared by graduate
engineering students for educational purposes within the Department of Civil and
Geological Engineering at the University of Saskatchewan. The quality and
accuracy of the information presented, including supporting design calculations,
drawings, cost estimates, and conclusions reached are not necessarily
consistent with professional engineering standards even though reasonable
efforts have been made to this end. The practice of professional engineering in
Canada can only be undertaken by appropriately licensed professional engineers
therefore all contents of this presentation, including all data, figures, drawings,
findings and cost estimates cannot be used, in whole or in part, for the design
and/or construction of any engineering works without an appropriately licensed
professional engineer taking professional responsibility for the contents so used.
Any use of, or reliance on, the information contained in this file by any third party
is at that party’s sole risk.
Further, any use of the information contained in this file should be cleared with
the author, and must provide full acknowledgement to the author.
Integration of Structural Information into an Urban Asset Management System
By Colin Prang, M.Sc. Candidate, Final Year
February 3, 2012
TransportationResearch
CentreIntegration of Structural information into COS Asset Management System 2
Acknowledgements
Sponsor of Research: City of Saskatoon. Supervisor: Curtis F. Berthelot. Committee:
Murray Totland,
Gordon Sparks,
Jan-Mark Gustafson
TransportationResearch
CentreIntegration of Structural information into COS Asset Management System 3
Background
Several premature roadway failures in Saskatoon
2000 Heritage Way (failure after 11 years)
2003 Heritage Cr. (failure after 7 years)
TransportationResearch
CentreIntegration of Structural information into COS Asset Management System 4
Background
TransportationResearch
CentreIntegration of Structural information into COS Asset Management System 5
Background
In 2004 Edson Street failed due to loss of structural capacity caused by:
• High water table
• Fine grained sub grade
• Slow moving, heavy loads
The reconstruction utilized sub surface drainage, a geotextile on the sub grade for separation, and a geogrid within the base layer for strength.
TransportationResearch
CentreIntegration of Structural information into COS Asset Management System 6
Background
Problem:
Several City of Saskatoon Streets are structurally failing less than 20 years after construction
• Attridge Drive in 2005 (4 years old)
• Nemeiben Rd. in 2005 (16 years old)
• Emmiline Rd. in 2006 (17 years old)
• Braeburn Cr in 2007 (16 years old)
2007 Surface Condition Survey
TransportationResearch
Centre
Erindale Road Condition
Integration of Structural information into an Urban Pavement Management System 7
TransportationResearch
CentreCOS Roadway Construction Standards
9
Geotextiles with subsurface drainage
TransportationResearch
Centre
Development of a Structural Asset Management System for Urban Pavements 10
TransportationResearch
CentreIntegration of Structural information into an Urban Pavement Management System 11
Background
Goal: To incorporate structural evaluation measures to improve the optimization of roadway expenditures within the COS’s current asset management system.
Quantify benefits of structural information with regards to:
1) Improved treatment selection
2) Improved performance prediction models
3) Improved structural design processes
TransportationResearch
Centre
Network Level Condition
HWD Testing (2006 – 2010)
Integration of Structural information into an Urban Pavement Management System 12
Segments tested Total HWD tests% Network Tested
Locals 189 2,898 6.6%
Collectors 149 2,485 36.8%
Total 338 5,383 10.0%
TransportationResearch
CentreIntegration of Structural information into an Urban Pavement Management System 13
Work Completed
TransportationResearch
CentreIntegration of Structural information into COS Asset Management System 14
Network Level Condition
Distribution of Peak Surface Deflections - Locals
Good Fair Poor Very Poor
TransportationResearch
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Semi-Network
Integration of Structural information into an Urban Pavement Management System 15
TransportationResearch
Centre
Semi-Network
Integration of Structural information into an Urban Pavement Management System 1657
4
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2128
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164652
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52
8th St E
<Incorrect>
Boy
chuk
Dr
Taylor St E
Bria
rgat
e R
d
Braeside View
Brookhurst Cres
Banyan Cres
Blackburn Cres
Briarwood Rd
Brookmore Cres
Beech
dale Cres
Beechmont Lane
Beechmont Cres
Bayfield Cres
Blac
ktho
rn C
res
Brookhurst Lane
Brookshire C
res
Bellmont Cres
Bla
cksh
i re C
res
<unamed>
Briarvale Rd
Brookdale Cres
Braeburn Cres
Bayview Cres
Braeshire Lane
Brookmore Lane
Heritage Cres
Beechdale W
ay
Heritage Green
Bayv
iew
Ter
r
Bayview Close
Beechwood Cres
Bellmont Crt
Bro
okm
ore
View
Bee
chda
le C
rt
Beechmont Terr
Herold Rd
Bayfield Pl
TransportationResearch
Centre
Semi-Network
Integration of Structural information into an Urban Pavement Management System 17
Surface condition compared to structural condition
TransportationResearch
Centre
Project Level Condition
Integration of Structural information into an Urban Pavement Management System 18
TransportationResearch
Centre
Project Level Condition
Integration of Structural information into an Urban Pavement Management System 19
TransportationResearch
Centre
Project Level Condition
Integration of Structural information into an Urban Pavement Management System 20
Very
Poor
Poor
Fair
Good
TransportationResearch
Centre
Project Level Condition
Greaves Crescent in Willowgrove (7 years after construction)
Integration of Structural information into an Urban Pavement Management System 21
TransportationResearch
CentreIntegration of Structural information into COS Asset Management System 22
Financial Implications
Several neighborhoods in Saskatoon have been constructed with insufficient structural capacity.
Life cycle costing was used to estimate an annual liability of $8.13 million over a 56 year period for existing poorly constructed locals.
TransportationResearch
CentreIntegration of Structural information into COS Asset Management System 23
Solutions
Urban roads are typically constructed level to their surroundings Wet granular base has significantly less stiffness than base at
optimum moisture. Thin structures, such as locals, rely on the sub grade for support Sub surface drainage layers have been found to be effective at
removing free water, adding structural support, and maintaining structural stiffness thus prolonging the service life.
The use of geotextile adds further strength and separation of materials that adds longevity.
TransportationResearch
CentreIntegration of Structural information into COS Asset Management System 24
Conclusion
Preservation and restoration treatments are less effective when a roadway is structurally deteriorated.
This research has shown that observed cracking is a poor indicator of structural condition.
Knowledge of existing structurally deficient roadways would improve transit route planning, detours, load management, as well as material selection and structural design.
It was found that an additional $1,525 per serviced lot will save $746 per year in future maintenance. (40% ROI!!!)
This research found that the integration of structural information into the COS asset management system will improve the life cycle performance, level of service, and funding optimization of roadway expenditures.