{"id":24022,"date":"2023-05-31T10:17:54","date_gmt":"2023-05-31T08:17:54","guid":{"rendered":"https:\/\/maccaferri-stage.softecspa.it\/fr\/exemples-de-r\u00e9ussites\/creation-bassin-deau-pluviale-sur-des-residus-de-bauxite\/"},"modified":"2024-01-26T12:06:19","modified_gmt":"2024-01-26T11:06:19","slug":"creation-bassin-deau-pluviale-sur-des-residus-de-bauxite","status":"publish","type":"stories","link":"https:\/\/maccaferri-stage.softecspa.it\/fr\/exemples-de-r\u00e9ussites\/creation-bassin-deau-pluviale-sur-des-residus-de-bauxite\/","title":{"rendered":"CREATION BASSIN D’EAU PLUVIALE SUR DES RESIDUS DE BAUXITE"},"content":{"rendered":"
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Probl\u00e8me<\/h3>\n <\/div>\n <\/div>\n <\/div>\n <\/div> \n <\/div>\n
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A Gardanne, la soci\u00e9t\u00e9 Alt\u00e9o fabrique des alumines depuis 130 ans. Sur le site de Mange-Garri tout proche, les d\u00e9p\u00f4ts de r\u00e9sidus de bauxite sont dor\u00e9navant ass\u00e9ch\u00e9s \u00e0 l\u2019aide de filtre-presse avant d\u2019\u00eatre stock\u00e9s. Le bassin B7 du site de Mange-Garri sert de bassin de s\u00e9curit\u00e9 et re\u00e7oit une bonne partie des eaux de ruissellement du site ; des r\u00e9sidus de bauxite riches en eau y sont stock\u00e9es depuis plusieurs d\u00e9cennies, l’\u00e9paisseur des d\u00e9p\u00f4ts pouvant atteindre 20 m. Bien que la surface de B7 soit ass\u00e9ch\u00e9e par le soleil sur une dizaine de centim\u00e8tre, il demeurait impossible de marcher sur le site, les mat\u00e9riaux se comportant un peu comme des sables mouvants. Aucun engin motoris\u00e9 ne pouvait \u00e9voluer sur ce bassin.<\/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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Alt\u00e9o est engag\u00e9 dans une d\u00e9marche de r\u00e9duction de ses impacts sur l\u2019environnement, parmi ces projets, le site de Mange-Garri devait \u00eatre dot\u00e9 d\u2019un bassin d\u2019eau pluviale de 110 000 m3 permettant de collecter l\u2019ensemble des eaux de ruiss\u00e8lement du site et ainsi \u00e9viter leur relargage dans l\u2019environnement. L\u2019eau stock\u00e9e pourra ensuite \u00eatre r\u00e9utilis\u00e9es dans le process industriel. Avec des d\u00e9p\u00f4ts en place fluides et non consolid\u00e9s, l\u2019installation du dispositif d\u2019\u00e9tanch\u00e9it\u00e9 (GSB et G\u00e9omembrane) \u00e9tait impossible. La solution g\u00e9osynth\u00e9tique est vite apparue comme incontournable, deux types de g\u00e9osynth\u00e9tiques assurant des fonctions distinctes ont \u00e9t\u00e9 employ\u00e9s afin de pr\u00e9parer une assise stable au futur bassin \u00e9tanche : *Afin d\u2019assurer une s\u00e9paration entre les r\u00e9sidus et la couche de remblai, et afin de limiter les efforts cisaillant dans les r\u00e9sidus, il a \u00e9t\u00e9 n\u00e9cessaire d\u2019installer un g\u00e9ocomposite de traficabilit\u00e9 compos\u00e9 d\u2019un g\u00e9otextile de filtration et d\u2019une g\u00e9ogrille de stabilisation en polypropyl\u00e8ne extrud\u00e9e : la MacGrid CE 40S. *Afin de prot\u00e9ger le dispositif d\u2019\u00e9tanch\u00e9it\u00e9 d\u2019une d\u00e9formation excessive, une g\u00e9ogrille de renforcement ParaGrid HF 150 a \u00e9t\u00e9 utilis\u00e9e. Pr\u00e9sentant une r\u00e9sistance \u00e0 la traction \u00e0 long terme (120 ans) de 30 kN\/m \u00e0 3% de d\u00e9formation, elle limitera la d\u00e9formation de la g\u00e9omembrane sus jacente en cas de tassement diff\u00e9rentiel. Ce retour d\u2019exp\u00e9rience sur un chantier de grande ampleur illustre la polyvalence et l\u2019efficacit\u00e9 des g\u00e9osynth\u00e9tiques. <\/p>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>

Used Products<\/h2>
\"G\u00e9ogrilles<\/div>
G\u00e9ogrilles monoaxiales<\/h6>Les g\u00e9ogrilles sont utilis\u00e9es, principalement, \u00e0 des fins de renforcement, compte tenu de leur structure particuli\u00e8re qui leur permet de fournir la fo<\/span>Voir\n \n <\/a>
star<\/span><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"

Alt\u00e9o est engag\u00e9 dans une d\u00e9marche de r\u00e9duction de ses impacts sur l\u2019environnement, parmi ces projets, le site de Mange-Garri devait \u00eatre dot\u00e9<\/p>\n","protected":false},"featured_media":9445,"parent":0,"menu_order":0,"template":"","stories-category":[],"stories-tag":[],"class_list":["post-24022","stories","type-stories","status-publish","has-post-thumbnail","hentry"],"acf":{"products":null,"applications":null,"solutions":null,"sectors":null},"yoast_head":"\nCREATION BASSIN D'EAU PLUVIALE SUR DES RESIDUS DE BAUXITE - Maccaferri France<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/maccaferri-stage.softecspa.it\/fr\/exemples-de-r\u00e9ussites\/creation-bassin-deau-pluviale-sur-des-residus-de-bauxite\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CREATION BASSIN D'EAU PLUVIALE SUR DES RESIDUS DE BAUXITE - 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