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.

  1. 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.
  2. Planys’ proprietary image enhancement algorithm was used to enhance the videos taken in the extremely turbid waters
  3. Planys ROV pilot navigated the ROV expertly through the silty river collecting crucial data.
  4. 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