Rock-Dumping Work – Autoroute A61 – Pi 3219. As An Indication, The Nature And Extent Of The Work To Protect The Banks Of The Structures Against Scouring Are: - Filling Of The Scouring To The Right Of The Piers (Bed Side) With Granular Materials Resting On A Filtration Geotextile And Delimited By A Curtain Of Sheet Piles Previously Lowered, - Filling Of The Scours To The Right Of The Piers (Pile Side) With Filling Concrete Resting On A Filtration Geotextile And Delimited By A Curtain Of Sheet Piles Previously Lowered, - Implementation Of A Armor Layer Of Rockfill Heavy In Two Layers, - Implementation Of A Geotextile Then Riprap, On The Flat Surfaces At The Back Of The Piles.
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