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Benefits of saturation diving for bottom outlet rehabilitation
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Sediment / debris accumulation Stop logs / gates malfunction Corrosion / erosion on embedded parts Concrete deterioration
Bottom outlet problematics
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Benefits of saturation diving for bottom outlet rehabilitation - - PowerPoint PPT Presentation
Benefits of saturation diving for bottom outlet rehabilitation - - PowerPoint PPT Presentation
Benefits of saturation diving for bottom outlet rehabilitation Jeremy Brunet-Manquat j.brunetmanquat@hydrokarst.fr 1 Bottom outlet problematics Sediment / debris accumulation Stop logs / gates malfunction Corrosion / erosion on embedded
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What is saturation diving ?
Divers live at working pressure for 28 days Up to 6 hours shifts Constant monitoring of living condition Only one decompression at the end
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What is saturation diving ?
Surface diving Bell diving Mixed-gas bounce diving Saturation diving
- 50 m
1 hour
- 75 m
45 min
- 180 m
45 min
- 200 m
6 hours
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Rehabilitation program
Site installation
Installation on crest or pontoons Fast and easy transportation on standard trailer trucks
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Rehabilitation program
Dredging and cleaning
Grabbing Pumping Airlift Final hand cleaning Bathymetric survey
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Rehabilitation program
Insulation of outlet
Tailored design Installation on complex structures Geometry adapted to rehabilitation requirements
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Rehabilitation program
Underwater repairs
Demolition, concreting Welding Sawing, cutting Drilling, injection Replacement of embedded parts
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Benefits of saturation diving
Reservoir at full water level
Power generation optimization No waste of water Environmental friendly solution
Longer working time Maximum depth 200 m
No limitation of works Safest diving method
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Benefits of saturation diving for bottom outlet rehabilitation
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