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VIDEO INSPECTION AND LASER PROFILING IN FLORIDA ALDOT CONSTRUCTION AND MATERIALS ENGINEERS CONFERENCE Larry Ritchie, FDOT September 2, 2014
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VIDEO INSPECTION AND LASER PROFILING IN FLORIDAconferences.dot.state.al.us/CEME/2014-Presentations/2/ALDOT CEME... · VIDEO INSPECTION AND LASER PROFILING IN FLORIDA ALDOT CONSTRUCTION

Apr 02, 2018

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Page 1: VIDEO INSPECTION AND LASER PROFILING IN FLORIDAconferences.dot.state.al.us/CEME/2014-Presentations/2/ALDOT CEME... · VIDEO INSPECTION AND LASER PROFILING IN FLORIDA ALDOT CONSTRUCTION

VIDEO INSPECTION AND LASER PROFILING IN FLORIDA

ALDOT CONSTRUCTION AND MATERIALS ENGINEERS CONFERENCE

Larry Ritchie, FDOTSeptember 2, 2014

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PIPE INSPECTION

Over the last 5 years, the Department has spent approximately 175 million dollars on drainage pipe and over 9.5 million dollars on pipe repair.

With costs like these, it is extremely important to insure that pipe is installed correctly, inspected thoroughly and replaced or repaired correctly when warranted.

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PIPE INSPECTION

FDOT is an optional pipe materials state.  We allow the use of both flexible and rigid pipe and have specific performance criteria for each pipe material. The Department strives for  problem‐free installation of drainage systems on all DOT construction projects.  Specifications for installing pipe and the Final Pipe Inspection Report are tools used to achieve this goal

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DRAINAGE INSTALLATION

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PIPE INSPECTION

Pipe Inspection allows the contractor and the Department to obtain a first hand account of the condition of culvert pipe installed on a construction project. 

Provides the Department with some assurance that the Drainage system was installed correctly and is functioning properly.

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PIPE INSPECTION

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PIPE INSPECTION

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PIPE INSPECTION

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PIPE INSPECTION

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WHAT NEEDS TO BE INSPECTED?? For pipe 48 inches or less in diameter, provide the Engineer a 

video DVD and report using low barrel distortion video equipment with laser profile technology, non‐contact video micrometer and associated software that provides:

1. Actual recorded length and width measurements of all cracks within the pipe.2. Actual recorded separation measurement of all pipe joints.3. Pipe ovality report4. Deflection measurements and graphical diameter analysis report in terms of x and y axis

5. Flat analysis report6. Representative diameter of the pipe7. Pipe deformation measurements, leaks, debris, or other damage or defects.8. Deviation in pipe line and grade, joint gaps and joint misalignment.

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WHAT IS THIS STUFF???

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INSPECTION EQUIPMENTLaser Profiling and Video Inspection Equipment consists of 4 

main components:

1. Crawler‐Moves the equipment through the pipeline.

2. Closed Circuit TV camera‐ records images and sends data back to a computer

3. Laser Profiler – provides numerous measurements of a pipe’s internal surface.

4. Software – interprets data and generates an inspection report. 

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CRAWLER

These machines come with several different wheel sets or tracks that must be changed out to accommodate the size and type of pipe being inspected.

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CCTV

The Closed Circuit Television (CCTV) records all of the images for the pipe inspections.  This is the equipment that pans and tilts around the inside of a pipe for observations and measurements. 

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LASER PROFILER

There are currently two different types of technology used for profiling pipe in the Florida.

Rotating head laser profiler 

Continuous ring laser profiler

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ROTATING PROFILER

The rotating head profiler has two laser diodes built into the CCTV camera head.  The diodes take continual measurements while the camera head rotates 360 ْ◌ at a set speed while the crawler is pulled back through the pipe.

DIODES

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CONTINUOUS RING PROFILER The continuous ring profiler projects a visible laser beam onto the internal surface of the pipe.  The beam is centered in the field of view of the CCTV camera and the camera records the image of the beam as it is pulled back through the pipe.

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CONTINUOUS RING PROFILER

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SOFTWARE

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PIPE OVALITY REPORT

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FLAT GRAPH ANALYSIS

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Common Pipe Issues Seen During Inspection

Over the past couple of years, the majority of pipe issues reviewed and repaired have been:

Leaking Joints Joint Gaps Deflection Cracking

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PIPE INSPECTION

Overall, the quality of the video inspection documentation has improved greatly.  However, there are still several areas of concern:

1. Camera Speed during the video inspection2. Failure to dewater prior to inspection3. Partial inspection or completely missing joints 4. Only inspecting joints and not evaluating the entire pipe5. Not measuring all of the defects observed6. Poor picture quality due to lighting, video, etc.7. Wrong file format that make files hard to open

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WHAT’S NEXT??

FDOT is currently revising our Specification to simplify the reporting requirements.

Researching independent third party verification of equipment calibration as well as operator certification 

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AND FINALLY…..12’ Alligator found in the storm sewer during pipe desilting 

operations in Okeechobee on SR 70

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QUESTIONS???