1. Alumni House Sidewalk Failure
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Figure 1. Alumni House Sidewalk
(Photo by Shaun Frey)

2. Outline

Introduction to the Alumni House Sidewalk Failure

3. Typical Sidewalk Construction 4. Alumni House Sidewalk Failure 5. Emergency Replacement Design 6. Proper Replacement Design 7. Importance of Proper Design 8. EthicsShaun Frey, Alumni House Sidewalk Failure
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9. Introduction
Public Works Projects
Why did the sidewalk fail?
When and why was it replaced?
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10. Typical Sidewalk Construction
Sub-grade Material
Filter Fabric
Base Material
Concrete
Joints
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11. Original Alumni House Sidewalk Failure
Water infiltration causing washout of the base material
Freeze/Thaw process causing frost heave
Design for base material was poor
Original plans show proper design, however budgetary constraints limited construction possibilities
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Figure 1. Alumni House Sidewalk
(Photo by Shaun Frey)
12. Figure 2. Flag Pole Square
Asphalt heat patch shows some maintenance already done.
(Photo by Shaun Frey)
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13. Figure 3. Safety Concerns
Not just cracking and chipping sidewalk. Holes and various other trip hazards along entire length of sidewalk.
(Photo by Shaun Frey)
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14. Figure 4. Safety Concerns
Engineers roped off half of the sidewalk due to these trip hazards.
(Photo by Shaun Frey)
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15. Replacement Design
Simple Design
Time constraints
Budget Constraints
3 Scenarios formulated
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Figure 5. Alumni House Sidewalk Replacement
(Photo by Chris Velie)
16. Scenario One
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Figure 6. Scenario 1
(Photo By Shaun Frey)
17. Scenario Two
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Figure 7. Scenario 2
(Photo by Shaun Frey)
18. Scenario Three
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Figure 8. Scenario 3
(Photo By Shaun Frey)
19. Actual Replacement
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Figure 9. Replacement Construction
(Photo by Chris Velie)
20. Future Design Considerations
Similar situation near Hoofers
Break wall with large boulders to break the lake waters
Protecting the base and sub-grade
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Figure 10. Hoofers Design
(Photo by Steve Harman)
21. Figure 11. Construction of Break Wall
Construction costs are expensive because holding back the lake water
(Photo by Steve Harman)
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22. Importance of Proper Design
Safety Concerns
High costs up front, but save money due to maintenance
Alumni House Patio
Ethics
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23. Questions?
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24. References

Day, R. (1995). Pavement deterioration: Case study. Journal of Performance of Constructed Facilities, 9(4), 311-318. Retrieved 3/3/09.

25. Velie, Christian. UW-Facilities Planning and Management, Engineering Specialist. Interviewed 3/2/09, 3/24/09. 26. Harman, Steve. UW-Capital Planning and Development, Project Manager. Interviewed 2/27/09, 3/24/09. 27. Rajani, B. (2002). Behaviour and performance of concrete sidewalks. Construction Technology Updates, 53, 1. Retrieved 3/29/09.Shaun Frey, Alumni House Sidewalk Failure
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