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Post Installation Pipe Inspection
Prepared forKYTC Section Engineers Meeting
March 5, 2013By
Kean H. Ashurst Jr., P.E.Kentucky Transportation Center
Overview
• More structured and standardized reporting format
• Different technologies for laser deflection testing
• What to look out for• Certification Program
Video Inspection Summary ReportPIPE VIDEO INSPECTION SUMMARY REPORT
Project Information
Project #: FD01 234 567 890-012 Item #: 1-234.56 Date: 12/15/11
District: D7 County: Fayette Route: US1 Inspector Information
Inspecting Contractor: Random Pipe Inspections Inc.
Operator Name: John Doe Operator Name:
Operator Name: Operator Name:
Inspecting Contractor Signature: Date: Pipe Information
Beginning Station Ending Station Dia. Material Length Type Pvmnt Cracks > 0.1"
Joint Separations Other Pages
174+00.00–215.00’ LT 174+00.00-407.79’ LT 24 HDPE 169.1 SD N N/A Y Y 2 to 8
200+02.30-399.28’ LT 200+65.58–452.79’ LT 30 HDPE 82.2 SD N N/A N N 9
228+85.59 RT 228+84.29 LT 18 HDPE 41.1 CD Y N/A N N 10
227+35.00 RT 228+85.59 RT 15 HDPE 147.3 SD Y N/A N N 11
Video Inspection Report - Individual PipeINDIVIDUAL PIPE VIDEO INSPECTION REPORT
Project Information
Project #: FD01 234 567 890-012 Item #: 1-234.56 Date: 12/15/11
District: D7 County: Fayette Route: US1 Inspector Information
Inspecting Contractor: Random Pipe Inspections Inc.
Operator Name: John Doe Operator Name:
Operator Name: Operator Name: Pipe Information
Inspection Date 12/14/11 Installation Date 11/09/11 Begin Sta. 174+00.00–215.00’ LT End Sta. 174+00.00-407.79’ LT
Pipe Diameter 24 in. Pipe Material HDPE Pipe Length 173.7 ft. Inspected Length 173.7 ft.
Pipe Application Type Storm Drain Backfill Material Native Soil Backfill Embankment Height 7.5 ft.
Lining Type N/A Under Pavement No Inspection Information Inspection Information Continued
Location Comment Page Location Comment Page
0.0 ft. Begin Video Inspection at Junction 3 173.7 ft. End Inspection at Outlet Headwall 8
2.7 ft. Sag 4
22.2 ft. Sag 4
28.4 ft. Joint Separation > 1.0 inch (1.21”) 4
30.4 ft. Sag 5
51.4 ft. Sag 5
61.1 ft. Sag 5
70.0 ft. Joint Separation > 1.0 inch (1.15”) 6
77.7 ft. Sag 6
91.3 ft. Joint Separation > 1.0 inch (1.42”) 6
106.5 ft. Sag 7
111.7 ft. Joint Separation > 1.0 inch (1.59”) 7
123.8 ft. Sag 7
136.6 ft. Sag 8
Deflection Inspection Summary ReportPIPE DEFLECTION INSPECTION SUMMARY REPORT
Project Information
Project #: FD01 234 567 890-012 Item #: 1-234.56 Date: 12/15/11
District: D7 County: Fayette Route: US1 Inspector Information
Inspecting Contractor: Random Pipe Inspections Inc.
Operator Name: John Doe Operator Name:
Operator Name: Operator Name:
Signature: Date: Pipe Information
Beginning Station Ending Station Date Dia Material Length Type Pvmnt > 5% > 7.5% > 10% Pages
174+00.00-407.79’ LT 174+00.00–215.00’ LT 12/14/11 24 HDPE 169.1 SD N Y N 2 to 5
200+65.58–452.79’ LT 200+02.30-399.28’ LT 12/14/11 30 HDPE 82.2 SD N N 6
228+84.29 LT 228+85.59 RT 12/14/11 18 HDPE 41.1 CD Y N 7
228+85.59 RT 227+35.00 RT 12/14/11 15 HDPE 147.3 SD Y Y Y N 8 to 11
Deflection Inspection Report - Individual PipeINDIVIDUAL PIPE DEFLECTION INSPECTION REPORT
Project Information
Project #: FD01 234 567 890-012 Item #: 1-234.56 Date: 12/15/11
District: D7 County: Fayette Route: US1 Inspector Information
Inspecting Contractor: Random Pipe Inspections Inc.
Operator Name: John Doe Operator Name:
Operator Name: Operator Name:
Inspection Date 12/14/11 Installation Date 11/09/11 Begin Sta. 174+00.00-407.79’ LT End Sta. 174+00.00–215.00’ LT
Pipe Diameter 24 in. Pipe Material HDPE Pipe Length 169.1 ft. Inspected Length 159.7 ft.
Pipe Application Type Storm Drain Backfill Material Native Soil Backfill Embankment Height 7.5 ft.
Lining Type N/A Under Pavement No Calibration Method Video calibration bar Inspection Information Inspection Information Continued
Location Comment Attachment Page Location Comment Attachment Page
169.1 ft. Begin Laser Inspection 0.0 ft. End of Pipe
150.1 ft. Joint
129.8 ft. Joint
109.6 ft. Joint
89.1 ft. Joint
77.3 ft. Begin deflection > 5% YES 4
74.2 ft. End deflection > 5%
68.9 ft. Joint
48.6 ft. Joint
28.4 ft. Joint
16.0 ft. Begin deflection > 5% YES 5
13.6 ft. End deflection > 5%
10.2 ft. End Laser Inspection
6.2 ft. Joint
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
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
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
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
Cues H/V Profile
Rausch Single Point Scan
Footage
Horizontal Deviation
Vertical Deviation
Width
Reference Ring
Scanned Profile
Average diameter for this “slice”
Nominal Diameter
Rausch Wireframe Diagram
Diameter, deformation &
deflection %
Distance in pipe
Color Deflection Limits
Red/Black > 5.7%Yellow/Brown >2.1%
Max Deflection Not in H/V
Rausch Vertical Profile
Rausch Vertical Profile
Rausch Vertical Profile
Cues Profile
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
Thank You
Kean H. Ashurst Jr., P.E.Kentucky Transportation Center
University of Kentucky176 Raymond BuildingLexington, KY 40506
(859) [email protected]
