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CASE STUDY

Dam inspection sample report

Objective
Remote Operated underwater Vehicle( ROV) based trial visual inspection and
Videography of the upstream face of a dam. Dye tracer based seepages / leakage
detections at suspected areas. To achieve this, EyeROV TUNA ROV( picture in Annexure 1),
operational upto depths of 100m was utilised. The ROV was appropriately fitted with custom
structures to achieve the object at a safe and efficient manner.

DAM - EyeROV

Longitudinal Overview of the Dam​ .

Conclusion
Remote Operated underwater Vehicle( ROV) based trial visual inspection and
Videography at the upstream face of the dam was executed. 4 lines of survey was completed
and various features and anomalies photos are taken. Full length videos of the 4 inspection line are also taken. Further, it was noticed that Guniting work ends at approximately 19m below the spillway crest and Masonry region are exposed below that.

EyeROV

EyeROV – ROV for Inspection services to Railways

 

 

 
  • Site     –       Thiruvananthapuram
  • Date    –       16/02/2018

Introduction :

All bridges are critical assets of national importance and their regular upkeep and maintenance is a mandate for safe transit. As there are hundreds and hundreds of railways bridges across rivers,  which need underwater inspections. Due to lack of safe diving or inspection operations these structures are often at negligence. Continuous battering of water currents, slurry, debris, and man made hazards like boat and ship collisions make these structures vulnerable over time.  Here we are trying underwater vehicles/ Micro ROV’s to solve this pressing problem. High end videography and analysis of critical parts of bridge was inspected with guidance from the Railway Officials of Southern Railways.

Site Information :

Railway Bridge in South India

Bridge has 3 piers and has protection piles around each pier.

Water had decent visibility with visibility upto 2 m underwater.  Water currents were less than 1 Kn then. The day was sunny and hot, but not very humid.

Inspection and Results:

The inspection started at 9 am and was performed for nearly 1 hour. The middle pier ( pier no 2.) was inspected from downstream side through water using ROV EyeROV Humpback. General condition of pier, scouring around the pier and degradation of concrete(if any) etc… where the areas we looked for. Fairly decent photos of the whole bridge was captured at varying depths.

The user had assessed the whole inspection video and inferred that the videos is helping them plan the maintenance of the footing. They have got convincing proof of surface erosion and the coarse aggregates being exposed. Pictures of the inspection is attached below.