Post Installation Pipe Inspection

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



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



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



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


• 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


• 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



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]

Documents

Post Installation Pipe Inspection