Inspection in Turbid Rivers

Planys conducted underwater visual inspections for a total of nine railway bridges in East India. The bridges were in regions with constant flow of silt, debris & probably industrial discharge. This led to the river being extremely turbid (having zero visibility) hence making it impossible and unsafe for human divers to perform inspection.

Scope of Work: Visual inspection of the submerged sections of 9 bridges consisting of a total of 44 RCC piers.

Planys Solution: The inspection was performed using Planys’ ROV Orca equipped with high resolution camera, turbid water module, altimeter and depth sensor.

  • Over 320 anomalies were identified and categorised into minor, moderate & major based on the size of the defects that included cracks, cavities, debonding of layers, erosion.
  • Planys’ proprietary image enhancement algorithm was used to enhance the videos taken in the extremely turbid waters
  • Planys ROV pilot navigated the ROV expertly through the silty river collecting crucial data.
  • All anomalies/defects were plotted against geo-tagged CAD drawing of every section on the Planys Analytics Dashboard (PAD) with localised click-to-view video.     

Images show deployment & site setup of the ROV system during inspection

Images show dimensions extracted with Planys ROV of debonding, cavity, and surface deformation during inspection

 “Hot-spot” map showing concentration of anomalies