Alumni House Sidewalk Failure Presentation

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

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 2

9. Introduction Public Works Projects Why did the sidewalk fail? When and why was it replaced? Shaun Frey, Alumni House Sidewalk Failure 3

10. Typical Sidewalk Construction Sub-grade Material Filter Fabric Base Material Concrete Joints Shaun Frey, Alumni House Sidewalk Failure 4

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 Shaun Frey, Alumni House Sidewalk Failure 5 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) Shaun Frey, Alumni House Sidewalk Failure 6

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) Shaun Frey, Alumni House Sidewalk Failure 7

14. Figure 4. Safety Concerns Engineers roped off half of the sidewalk due to these trip hazards. (Photo by Shaun Frey) Shaun Frey, Alumni House Sidewalk Failure 8

15. Replacement Design Simple Design Time constraints Budget Constraints 3 Scenarios formulated Shaun Frey, Alumni House Sidewalk Failure 9 Figure 5. Alumni House Sidewalk Replacement (Photo by Chris Velie)

16. Scenario One Shaun Frey, Alumni House Sidewalk Failure 10 Figure 6. Scenario 1 (Photo By Shaun Frey)

17. Scenario Two Shaun Frey, Alumni House Sidewalk Failure 11 Figure 7. Scenario 2 (Photo by Shaun Frey)

18. Scenario Three Shaun Frey, Alumni House Sidewalk Failure 12 Figure 8. Scenario 3 (Photo By Shaun Frey)

19. Actual Replacement Shaun Frey, Alumni House Sidewalk Failure 13 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 Shaun Frey, Alumni House Sidewalk Failure 14 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) Shaun Frey, Alumni House Sidewalk Failure 15

22. Importance of Proper Design Safety Concerns High costs up front, but save money due to maintenance Alumni House Patio Ethics Shaun Frey, Alumni House Sidewalk Failure 16

23. Questions? Shaun Frey, Alumni House Sidewalk Failure 17

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 18