Benefits of saturation diving for bottom outlet rehabilitation - PowerPoint PPT Presentation

Oct 18, 2022 •233 likes •348 views

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

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 parts Concrete deterioration 2
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 3
What is saturation diving ? Surface diving - 50 m 1 hour Bell diving - 75 m 45 min Mixed-gas bounce diving - 180 m 45 min Saturation diving - 200 m 6 hours 4
Rehabilitation program Site installation Installation on crest or pontoons Fast and easy transportation on standard trailer trucks 5
Rehabilitation program Dredging and cleaning Grabbing Pumping Airlift Final hand cleaning Bathymetric survey 6
Rehabilitation program Insulation of outlet Tailored design Installation on complex structures Geometry adapted to rehabilitation requirements 7
Rehabilitation program Underwater repairs Demolition, concreting Welding Sawing, cutting Drilling, injection Replacement of embedded parts 8
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 9
Benefits of saturation diving for bottom outlet rehabilitation Jeremy Brunet-Manquat j.brunetmanquat@hydrokarst.fr 10

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