SEWER INSPECTION – SEMI SURCHARGED PIPES
CCTV is used in the “Dry” area with specifically designed continuous scanning High Resolution Sonar under the water level. This enables the Invert of the pipe to be clearly seen too, resulting in a one pass, 360°, complete Inspection.
The equipment can be self propelled or floated in pipe sizes from 21″ to greater than 100″ diameter.
The Sonar Image [Sonar explained] is superimposed onto the CCTV picture, resulting in a single video file.
This method is also a perfect tool for measuring Debris prior to cleaning sewers (and after, as a QC check) as very accurate silt levels can be taken.
(The videos provided as part of a comprehensive Amtec survey report are to a much higher quality than these web-friendly samples.)