1. Post Installation Inspection Demonstration

2. Goal Understand Importance of PII See PII Tools & Techniques
Quality Production/Materials + Stringent QC (Plant Tour)
Knowledge of Correct Crack Evaluation for RCP (PPT. Handouts, & 3EB Demo)

3. Why ARE more Specifiers Requiring Stringent PII
Improved technology
Slide 3

4. Why ARE more Specifiers Requiring Stringent PII
Improved technology
Verifies getting what is paid for
Slide 4

5. Why ARE more Specifiers Requiring Stringent PII
Improved technology
Verifies getting what is paid for
Proper installation can be confirmed
Slide 5

6. Why ARE more Specifiers Requiring Stringent PII
Improved technology
Verifies getting what is paid for
Proper installation can be confirmed
Structure support of flexible pipe is confirmed
Slide 6

7. Why ARE more Specifiers Requiring Stringent PII
Improved technology
Verifies getting what is paid for
Proper installation can be confirmed
Structure support of flexible pipe is confirmed
Find installation and/or construction damage to all pipe types
Slide 7

8. Why ARE more Specifiers Requiring Stringent PII
Improved technology
Verifies getting what is paid for
Proper installation can be confirmed
Structure support of flexible pipe is confirmed
Find installation and/or construction damage to all pipe types
Overall quality of installations will improve
Slide 8

9. Why ARE more Specifiers Requiring Stringent PII
Improved technology
Verifies getting what is paid for
Proper installation can be confirmed
Structure support of flexible pipe is confirmed
Find installation and/or construction damage to all pipe types
Overall quality of installations will improve
Asset management potential
Slide 9

10. Post Installation Inspection – National Standards
AASHTO CIRCA
CMP – Section
RCP – Section
HDPE – Section

11. TOOLS OF THE TRADE POST INSTALLATION INSPECTION
RCP
HDPE
CMP
Visual/Video Inspection
Mandrel Testing
Laser Deflectometer

12. SHAPE CONTROL ONLY Mandrel Testing
Go-No-Go device
Nine (or greater odd number) arm mandrel
Sized and inspected by the Engineer prior to testing
5% Deflection & 7 ½% Deflection
Stuck if deflection is exceeded
Slide 12

13. Mandrel Testing (WORDING IS CRITICAL)
The diameter of the mandrel at any point shall not be
less than the allowable percent deflection of the
certified actual mean diameter (or NOMINAL DIAMETER)
of the pipe or culvert being tested.
Slide 13

14. NEW BREED of Pipe Inspection Tools

15. WA OR ID MT WY UT CO NV CA AZ NM ND SD MN IA WI TX OK KS NE MO IL KY MI AR MS AL GA PA LA FL SC VA WV NY ME RI DE MD NC OH IN TN VT NH MA NJ CT AK
Will post installation inspection become more prevalent?
States shown in solid yellow have mandatory deflection inspection requirements.
States shown in dashed blue, require or allow the use of laser profiling technology for post-installation inspection.
About 30 State DOT’s require some type of Post Installation Inspection Storm Drainage
22 – States (Yellow) Require Mandrel Inspections – some considering CCTV + Laser Profiling + Micrometers
11 – States (Hashed) currently require or allow CCTV + Laser Profiling + Measurements of defects

16. Concrete Pipes / Culverts
Misalignment
Joints
Cracks
Spalls
Slabbing
Slide 16

17. Joints Note any leaking joints
Evidence of soil migration through joint requires evaluation
Differential movement, cracks, spalls, improper gasket placement, movement or settlement to be noted
Slide 17

18. Crack measurement
Slide 18

19. Crack measurement
Slide 19

20. AASHTO LRFD Bridge Construction Specification Section 27.6.4 (Summary)
Crack less than or equal to 0.01”
These cracks are minor & OK
Crack between 0.01” and 0.10”
Evaluation required: is it detrimental and in a corrosive environment? (PH<5.5)
If non-corrosive or not detrimental – OK
If corrosive and detrimental – Seal crack
Crack equal to or greater than 0.10”
Evaluation required: is crack detrimental to structure?
If not detrimental – OK
If detrimental – repair and seal crack
If not repairable – remediate or replace
Slide 20

21. ANATOMY OF A CRACK DEFLECTION UNDER TEST CONDITION
STRESS ZONES UNDER TEST CONDITION
“As the load increases, the stress in the reinforcing steel increases, and since the modulus of elasticity of steel is much greater than that of concrete, the protective cover of concrete begins to show fine longitudinal cracks in the tensile zones on the inside of the pipe before the steel is stressed up to its capacity.”
TENSION
COMPRESSION

22. DETRIMENTAL or ACCEPTABLE
Crack Width Perspective…
Crack between 0.01” and 0.10”
Evaluation required: is it detrimental and in a corrosive environment? (PH<5.5)
If non-corrosive or not detrimental – OK
If corrosive and detrimental – Seal crack
Dime Thickness = 0.05” REALLY!

23. ANOTOMY OF A CRACK Circumferential Vs Longitudinal Cracks Normal Load Crack Locations?
Springline
Crack in Haunch Areas
Slide 23

24. Thermoplastic Pipes / Culverts
Misalignment
Joints
Cracks
Buckling, Bulging and Racking
Deflection
Slide 24

25. Slide 25

26. Deflection
Laser profiler, mandrel or physical measurement
Slide 26

27. Pipeline Profiling Laser Ring
Slide 27

28. Significance of Laser Deflection Testing
Easy to perform
Accurate, easily documented, simple to re-Inspect if necessary
Safe – minimal confined space issues
Tells the WHOLE story
Measures deflection at every location along the length of a pipeline
Quantifies the amount of deflection that can not be detected by camera or the naked eye
Provides additional analysis by computer software
Third Party = Fair, Accurate & Unbiased
Slide 28

29. Post Install Inspection Demo
See equipment and tools
Discuss measurement of conditions
See crack on screen Vs actual crack measurement
See joint gap on screen Vs actual measurement
See the deflection on screen
Slide 29

30. Demo Layout
Slide 30

31. Handouts ACPA “RCP Post Installation Evaluation and Repair Manual”
ACPA CP Info “Cracks In Installed Reinforced Concrete Pipe”
“Readers Digest” – AASHTO Crack Evaluation
Slide 31

32. Conclusion! Evaluation Based upon AASHTO Guidance
Encourage Stringent PII w/Correct Tools
Evaluation Based upon AASHTO Guidance
Cracks will be identified
NO EVALUATION IF NOT MEASURED
Dime or less and no Ph Issue = No Problem
DO NOT PANIC/USE KNOWLEDGE TO PROCESS DATA