Download pptx - EPD 275 Example

Transcript
Page 1: EPD 275 Example

Alumni House Sidewalk Failure

Shaun Frey, Alumni House Sidewalk Failure 1

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

Page 2: EPD 275 Example

Outline

• Introduction to the Alumni House Sidewalk Failure

• Typical Sidewalk Construction• Alumni House Sidewalk Failure• Emergency Replacement Design• Proper Replacement Design• Importance of Proper Design• Ethics

Shaun Frey, Alumni House Sidewalk Failure 2

Page 3: EPD 275 Example

Introduction

• Public Works Projects• Why did the sidewalk fail?• When and why was it replaced?

Shaun Frey, Alumni House Sidewalk Failure 3

Page 4: EPD 275 Example

Typical Sidewalk Construction

• Sub-grade Material• Filter Fabric• Base Material• Concrete• Joints

Shaun Frey, Alumni House Sidewalk Failure 4

Page 5: EPD 275 Example

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)

Page 6: EPD 275 Example

Figure 2. Flag Pole Square

Asphalt heat patch shows some maintenance already done.

(Photo by Shaun Frey)

Shaun Frey, Alumni House Sidewalk Failure 6

Page 7: EPD 275 Example

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

Page 8: EPD 275 Example

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

Page 9: EPD 275 Example

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)

Page 10: EPD 275 Example

Scenario One

Shaun Frey, Alumni House Sidewalk Failure 10

Figure 6. Scenario 1(Photo By Shaun Frey)

Page 11: EPD 275 Example

Scenario Two

Shaun Frey, Alumni House Sidewalk Failure 11

Figure 7. Scenario 2(Photo by Shaun Frey)

Page 12: EPD 275 Example

Scenario Three

Shaun Frey, Alumni House Sidewalk Failure 12

Figure 8. Scenario 3(Photo By Shaun Frey)

Page 13: EPD 275 Example

Actual Replacement

Shaun Frey, Alumni House Sidewalk Failure 13

Figure 9. Replacement Construction(Photo by Chris Velie)

Page 14: EPD 275 Example

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)

Page 15: EPD 275 Example

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

Page 16: EPD 275 Example

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

Page 17: EPD 275 Example

Questions?

Shaun Frey, Alumni House Sidewalk Failure 17

Page 18: EPD 275 Example

References

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

• Velie, Christian. UW-Facilities Planning and Management, Engineering Specialist. Interviewed 3/2/09, 3/24/09.

• Harman, Steve. UW-Capital Planning and Development, Project Manager. Interviewed 2/27/09, 3/24/09.

• 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