1. Post Installation Pipe Inspection Prepared for KYTC Section Engineers Meeting March 5, 2013 By Kean H. Ashurst Jr., P.E. Kentucky Transportation Center

2. Overview More structured and standardized reporting format Different technologies for laser deflection testing What to look out for Certification Program

3. Video Inspection Summary Report

4. Video Inspection Report - Individual Pipe

5. Deflection Inspection Summary Report

6. Deflection Inspection Report - Individual Pipe

7. Different Technologies Video inspection Laser inspection – 2 different technologies in use in KY – Rausch (spinning laser head) – Cues (laser ring) Both use laser light to measure off a picture Not time of flight laser measuring

8. What to look out for All deflection measurements should be based off of AASHTO nominal diameter The last 5 to 12 feet of all laser inspections are always missing Rausch unit is consistent Cues unit will vary Maximum scanning speed should not exceed 30 ft/min

9. What to look out for Rausch (spinning laser head) – As pull back speed increases the gap between identical points increases Rausch - Single point scans – Whole run scan vs. single point scan – Single point scan is more accurate Rausch - Unit has to be centered in pipe

10. What to look out for Calibration is critical for the Cues system Pipe is “racked” – Can control rather than horizontal/vertical – Cues has an ovality report – Rausch has a wireframe diagram If you can see deflections then most likely the pipe is over deflected

11. Cues H/V Profile

12. Rausch Single Point Scan Footage Horizontal Deviation Vertical Deviation Width Reference Ring Scanned Profile Average diameter for this “slice” Nominal Diameter

13. Rausch Wireframe Diagram Diameter, deformation & deflection % Distance in pipe Color Deflection Limits Red/Black > 5.7% Yellow/Brown >2.1%

14. Max Deflection Not in H/V

15. Rausch Vertical Profile

18. Cues Profile

19. Certification Program Post installation pipe certification program Test track – 3 materials (RCP, CMP, HDPE) – Distressed pipe – Show they can complete form – Adequately identify distresses and deflections – Operator certified for their equipment

20. Thank You Kean H. Ashurst Jr., P.E. Kentucky Transportation Center University of Kentucky 176 Raymond Building Lexington, KY 40506 (859) 257-7319 kean.ashurst@uky.edu