{"id":24193,"date":"2023-05-31T10:18:28","date_gmt":"2023-05-31T08:18:28","guid":{"rendered":"https:\/\/maccaferri-stage.softecspa.it\/fr\/exemples-de-r\u00e9ussites\/securisation-de-la-rd6002-au-hameau-des-blanqueries\/"},"modified":"2024-01-26T12:05:44","modified_gmt":"2024-01-26T11:05:44","slug":"securisation-de-la-rd6002-au-hameau-des-blanqueries","status":"publish","type":"stories","link":"https:\/\/maccaferri-stage.softecspa.it\/fr\/exemples-de-r\u00e9ussites\/securisation-de-la-rd6002-au-hameau-des-blanqueries\/","title":{"rendered":"S\u00c9CURISATION DE LA RD6002 AU HAMEAU DES BLANQUERIES"},"content":{"rendered":"
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Probl\u00e8me<\/h3>\n <\/div>\n <\/div>\n <\/div>\n <\/div> \n <\/div>\n
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Au niveau du Hameau des Blanqueries sur la commune de Puget-Th\u00e9niers, la RD 6002 et la voie ferr\u00e9e des Chemins de Fer de Provence traversent une zone d\u2019environ 30 m x 50 m soumise \u00e0 des remont\u00e9es r\u00e9currentes de fontis. Suite \u00e0 des effondrements successifs en 2016 (de 9m de long et 5m de large !), 2018 et 2021, le conseil d\u00e9partemental a \u00e9mis le souhait d\u2019installer des g\u00e9ogrilles de renforcement afin de se pr\u00e9munir de l\u2019ouverture brutale d\u2019une nouvelle cavit\u00e9 dans le futur. <\/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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De nombreuses \u00e9tudes complexes ont \u00e9t\u00e9 r\u00e9alis\u00e9es pour aboutir \u00e0 la pose de 2 niveaux de g\u00e9ogrilles de r\u00e9sistance extr\u00eamement \u00e9lev\u00e9e (1500 kN\/m), une premi\u00e8re dans les Alpes-Maritimes. Les g\u00e9ogrilles constituent une forme d\u2019assurance pour le maitre d\u2019ouvrage : en cas de survenue d\u2019une cavit\u00e9, la g\u00e9ogrille \u00e9vite l\u2019effondrement total, dans lequel un v\u00e9hicule pourrait tomber. Elle reprend les efforts de la structure sus jacente et conduit \u00e0 un simple affaissement en surface, moins dangereux pour l\u2018usager et permettant \u00e0 l\u2019exploitant de d\u00e9tecter la cavit\u00e9 et d\u2019intervenir avant que son diam\u00e8tre n\u2019\u00e9volue. Face \u00e0 la complexit\u00e9 de ce chantier, la soci\u00e9t\u00e9 Cozzi (groupe Colas) a fait appel \u00e0 la soci\u00e9t\u00e9 Maccaferri pour dimensionner une solution de renforcement par g\u00e9ogrille. Ce dimensionnement a abouti \u00e0 l\u2019installation de deux niveaux de Paralink 1500 kN\/m qui sont en mesure de limiter la d\u00e9flexion au centre de la cavit\u00e9 \u00e0 70 cm pour un diam\u00e8tre de cavit\u00e9 de 9 m. La gamme ParaLink de Maccaferri est certifi\u00e9e par le BBA (british board of Agr\u00e9ment), l\u2019organisme de r\u00e9f\u00e9rence sur les g\u00e9ogrilles qui produit des certificats complets reprenant l\u2019ensemble des informations n\u00e9cessaires au dimensionnement. L\u2019installation des 3300 m\u00b2 de Paralink 1500 s\u2019est d\u00e9roul\u00e9e en septembre 2021. Les rouleaux ont \u00e9t\u00e9 produits en longueur sur mesure afin de limiter au maximum les pertes et les recouvrements. La zone \u00e0 prot\u00e9ger forme une large courbe et le calepinage \u00e9tait fortement contraint avec d\u2019une part la voie ferr\u00e9e et d\u2019autre part l\u2019installation de la g\u00e9ogrille en demi chauss\u00e9e. Deux g\u00e9om\u00e9tries d\u2019ancrage ont \u00e9t\u00e9 retenues : soit un ancrage \u00e0 plat de 26 m soit une tranch\u00e9e d\u2019ancrage de 1 m de profondeur par 5 m de largeur.<\/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":"

De nombreuses \u00e9tudes complexes ont \u00e9t\u00e9 r\u00e9alis\u00e9es pour aboutir \u00e0 la pose de 2 niveaux de g\u00e9ogrilles de r\u00e9sistance extr\u00eamement \u00e9lev\u00e9e (1500 k<\/p>\n","protected":false},"featured_media":9445,"parent":0,"menu_order":0,"template":"","stories-category":[],"stories-tag":[],"class_list":["post-24193","stories","type-stories","status-publish","has-post-thumbnail","hentry"],"acf":{"products":null,"applications":null,"solutions":null,"sectors":null},"yoast_head":"\nS\u00c9CURISATION DE LA RD6002 AU HAMEAU DES BLANQUERIES - 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\/securisation-de-la-rd6002-au-hameau-des-blanqueries\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"S\u00c9CURISATION DE LA RD6002 AU HAMEAU DES BLANQUERIES - 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