{"id":110467,"date":"2025-10-29T07:58:26","date_gmt":"2025-10-29T06:58:26","guid":{"rendered":"https:\/\/www.maccaferri.com\/fr\/success-stories\/vidange-et-gestion-sedimentaire-de-la-retenue-du-barrage-de-vezins\/"},"modified":"2026-02-16T15:40:14","modified_gmt":"2026-02-16T14:40:14","slug":"vidange-et-gestion-sedimentaire-de-la-retenue-du-barrage-de-vezins","status":"publish","type":"stories","link":"https:\/\/www.maccaferri.com\/fr\/exemples-de-r\u00e9ussites\/vidange-et-gestion-sedimentaire-de-la-retenue-du-barrage-de-vezins\/","title":{"rendered":"VIDANGE ET GESTION S\u00c9DIMENTAIRE DE LA RETENUE DU BARRAGE DE VEZINS"},"content":{"rendered":"
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Challenge<\/h3>\n <\/div>\n <\/div>\n <\/div>\n <\/div> \n <\/div>\n
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Dans le cadre d\u2019un chantier de grande ampleur, l\u2019arasement de deux barrages sur le Fleuve S\u00e9lune, une solution de r\u00e9tention des s\u00e9diments a \u00e9t\u00e9 mise en place. Lors de la derni\u00e8re vidange de ces retenues, des s\u00e9diments pollu\u00e9s avaient \u00e9t\u00e9 emport\u00e9s vers la baie du mont St Michel. Cette catastrophe \u00e9cologique a entrain\u00e9 une disparition massive de la biodiversit\u00e9 du fleuve, les s\u00e9diments ont aussi profond\u00e9ment impact\u00e9 la dynamique du fleuve en aval en colmatant son lit. Avant d\u2019araser les barrages et afin d\u2019\u00e9viter une nouvelle pollution, une solution de r\u00e9tention des s\u00e9diments a d\u00fb \u00eatre mise en place. <\/p>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n

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Solution<\/h3>\n <\/div>\n <\/div>\n <\/div>\n <\/div> \n <\/div>\n
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La solution mur-poids en gabion a \u00e9t\u00e9 adopt\u00e9e pour former des casiers de stockage de s\u00e9diments\u00a0: les gabions assurent le sout\u00e8nement m\u00e9canique des s\u00e9diments avec des hauteurs jusqu\u2019\u00e0 5 m et assurent \u00e9galement la libre circulation des fluides pour ass\u00e9cher et donc consolider les s\u00e9diments lors de la baisse graduelle du niveau du lac. Afin d\u2019emp\u00eacher la migration des s\u00e9diments \u00e0 travers les gabions, un g\u00e9otextile de filtration a \u00e9t\u00e9 install\u00e9 en amont du mur gabion pour assurer la r\u00e9tention des particules tout en laissant passer les fluides. Peu de solution de sout\u00e8nement peuvent \u00eatre install\u00e9es sous l\u2019eau depuis un bateau. Le choix s\u2019est port\u00e9 sur des gabions double-torsion pr\u00e9remplis Cubiroc\u00ae qui pr\u00e9sentent plusieurs avantages : -Ils sont assembl\u00e9s puis remplis en carri\u00e8re pour former des structures de diff\u00e9rentes dimensions selon le calepinage de l\u2019ouvrage et \u00e9quip\u00e9es de suspentes de levage. -Ces unit\u00e9s ont \u00e9t\u00e9 install\u00e9es avec une grue directement sous l\u2019eau apr\u00e8s un curage de la fondation et son renforcement par des Matelas Reno\u00ae. Par empilement successif, un mur poids filtrant a \u00e9t\u00e9 \u00e9difi\u00e9 sous eau gr\u00e2ce \u00e0 des outils de positionnement et avec l\u2019assistance des plongeurs. -Les murs poids Gabion ont \u00e9t\u00e9 dimensionn\u00e9s\u00a0: une \u00e9tude de stabilit\u00e9 a permis de d\u00e9finir leur section pour s\u2019opposer \u00e0 la pouss\u00e9e des s\u00e9diments non consolid\u00e9s. -Les gabions sont tr\u00e8s poreux (30 %) et tr\u00e8s perm\u00e9able. Ils sont transparents hydrauliquement et contribuent \u00e0 l\u2019ass\u00e9chement des s\u00e9diments \u00e0 l\u2019arri\u00e8re. Les Matelas et gabions sont suffisamment souples pour \u00e9pouser le fond irr\u00e9gulier du lac.<\/p>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>

Used Products<\/h2>
\"Gabions\"<\/div>
Gabions<\/h6>Un large portefeuille de solutions Maccaferri propose une gamme \u00e9tendue de solutions sur mesure pour r\u00e9pondre \u00e0 chaque besoin sp\u00e9cifique. Le<\/span>Voir\n \n <\/a>
star<\/span><\/div><\/div><\/div><\/div><\/div>
\"Matelas<\/div>
Matelas Reno Plus<\/h6>RenoMac PlusS’appuyant sur le succ\u00e8s du Matelas Reno Plus, le RenoMac Plus offre les m\u00eames avantages en termes de durabilit\u00e9 et de performan<\/span>Voir\n \n <\/a>
star<\/span><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"

La solution mur-poids en gabion a \u00e9t\u00e9 adopt\u00e9e pour former des casiers de stockage de s\u00e9diments\u00a0: les gabions assurent le sout\u00e8nement m\u00e9canique <\/p>\n","protected":false},"featured_media":9445,"parent":0,"menu_order":0,"template":"","stories-category":[],"stories-tag":[],"class_list":["post-110467","stories","type-stories","status-publish","has-post-thumbnail","hentry"],"acf":{"products":[113687,113624],"applications":[103496,103496],"solutions":[103613],"sectors":[103466]},"yoast_head":"\nVIDANGE ET GESTION S\u00c9DIMENTAIRE DE LA RETENUE DU BARRAGE DE VEZINS - Maccaferri France<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez nos r\u00e9ussites : VIDANGE ET GESTION S\u00c9DIMENTAIRE DE LA RETENUE DU BARRAGE DE VEZINS. 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