Spillway & Plunge Pool Inspection
Planys conducted underwater visual inspection of a spillway, cellular wall and one intake unit of a critical dam in northeast India.
Scope of Work: Underwater visual of the cellular wall to examine if there are potential sources of leakage from the TRC to ensure smooth functioning of the rehabilitation work and a pre-monsoon maintenance measure. It included inspection of joints on the cellular wall, Tail Race Channel (TRC), stilling basin & stop log grooves.
Planys Solution: The underwater inspection was undertaken using Planys’ ROV Orca equipped with high resolution camera, turbid water module, altimeter, and depth sensor.
- Over 90 anomalies were identified and categorised into minor, moderate (60%) and major based on the size of the defects that included cracks, honeycomb formations, surface deformations, pinholes and debonding between layers.
- Dimensions of extent of defects was also extracted using Planys’ unique LASER scaler.
- Planys’ proprietary image enhancement algorithm was used to enhance the videos taken in the extremely turbid waters.
- 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 feature. The report was submitted to the client for relevant action points for re-work.
Images show deployment & site setup of the ROV system during inspection
Images showing extracted images of cracks and debonding between layers at cellular walls & grooves with Planys ROV
“Hot-spot” map showing concentration of anomalies