1. Post Installation Inspection & RCP Evaluation Tools

2. Goal
Share our Experiences from other States Requiring Similar PII Tools and Techniques
Provide Knowledge and Tools to obtain Correct Evaluation of Installed RCP

3. 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
12 – States (Hashed) currently require or allow CCTV + Laser Profiling + Measurements of defects

4. Experiences From Other DOT’s/Munis.
Stringent PII Inspection Specs. On Street
Fire-Drills
1st Fire Drill = 1st Bid Letting
2nd Fire Drill = 1st PII Reports completed
Fire-Drill Aversion leads to Training and knowledge gathering
Calming effect - Once all stake-holders up to speed
Slide 4

5. Prepare, Train, and Educate
Prepare DOT/Muni. Inspection &
Evaluation Team
NASSCO PACP Subcontractors
Educate Installers
Prepare All Stakeholders on
PII Eval. Process
(who what when where?)
Standard PII Report Format
Slide 5

6. Inspection Team Preparation
Trained on Proper Use of Inspection Equipment
Proper Inspection Techniques & Issue Coding
NASSCO PACP Certification
Know Limitations
Provide thorough,
clear, quantifiable
information

7. Evaluation Team DOT/Muni Specs. & AASHTO Guidelines
Differentiate Between
Cosmetic = Non-ISSUES
Minor Damage = Note but No Repair
Structural Issue = Evaluate Severity and determine if acceptable or what remedy required

8. Tools for Evaluation
“Post Installation Evaluation and Repair of Installed Reinforced Concrete Pipe”
See Your Handout!

9. Post Installation Evaluation and Repair of Installed Reinforced Concrete Pipe
Contents
Background on RCP Loads, Design, Structural Confirmation, & Joint Performance
Decision Matrix
Crack Eval. & Repair
Joint Eval. & Repair
Spalling and Slabbing Eval. & Repair
References & Supporting Documents

10. Crack Evaluation Matrix
Consistent with AASHTO Guidelines
Acceptance Vs Repair
Must know location, orientation, & crack width

11. Crack measurement Accuracy
Crack measurement Accuracy? Can you expect accurate measurements of cracks less than 0.05” in width? (Width of U.S. Dime = 0.05”)
Slide 11

12. AASHTO LRFD Bridge Construction Specification Section 27.6.4 (Summary)
Crack < 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 > 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 12

13. Crack Matrix
Allows user to quickly evaluate crack severity and determine if crack is detrimental or acceptable without repair. Follows AASHTO Guidance Be Prepared to see some cracking. Crack < 0.10” (width of two Dimes) = Generally Acceptable

14. Joint Eval. Matrix

15. Joint Matrix Performance Expectation?
Leak Resistant, Silt Tight, Soil Tight
Joint Opening meet Manufacturers recommendations
Infiltration of soil?

16. Joint Evaluation Accurate measurements Signs of infiltration
Signs of soil migration

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. Slabbing / Spalling Evaluation Matrix

19. Spalling/Slabbing Spalling
crack face edges
chipping at joint
No steel exposed = No Problem
Steel exposed needs repair
Slabbing – typically caused by Radial Tension Shear
Cracks 30 deg off invert
Slabs of concrete can become dislodged
Slabbing is repairable

20. Conclusion – Avoid Fire Drills
Prepare DOT/Muni. Inspection &
Evaluation Team
Obtain Clear and good Inspection Data
Develop Standard PII Report Format
Clear Evaluation Protocol – Utilize ACPA PII Eval. Manual
Educate Installers
Communicate PII Eval. Process to all Stakeholders