{"id":15580,"date":"2020-06-26T15:25:16","date_gmt":"2020-06-26T13:25:16","guid":{"rendered":"https:\/\/www.soletanche-bachy.com\/?p=15580"},"modified":"2023-03-22T15:38:23","modified_gmt":"2023-03-22T14:38:23","slug":"comment-innover-avec-des-micropieux-linjection-de-serrage-unitaire","status":"publish","type":"post","link":"https:\/\/www.soletanche-bachy.com\/comment-innover-avec-des-micropieux-linjection-de-serrage-unitaire\/","title":{"rendered":"Comment innover avec des micropieux ? L\u2019injection de serrage unitaire"},"content":{"rendered":"

26\/06\/2020<\/p>\n<\/div>

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Comment innover avec des micropieux ? L\u2019injection de serrage unitaire<\/h1><\/div>
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Innover encore en termes de micropieux, alors que tout est d\u00e9j\u00e0 d\u00e9fini dans les normes et les guides, pourrait sembler une gageure. C\u2019est pourtant ce qui a \u00e9t\u00e9 fait avec le proc\u00e9d\u00e9 ISU, injection de serrage unitaire, qui est l\u2019aboutissement d\u2019une d\u00e9marche de Soletanche Bachy visant, d\u2019une part, \u00e0 am\u00e9liorer la qualit\u00e9 d\u2019ex\u00e9cution des micropieux inject\u00e9s et, d\u2019autre part, \u00e0 rendre plus efficace la r\u00e9alisation des micropieux.<\/strong><\/p>\n<\/div>

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La norme d\u2019application nationale de l\u2019Eurocode 7 pour les fondations profondes, NF P94-262, d\u00e9finit quatre types de micropieux : les micropieux type I et II, les micropieux<\/a> inject\u00e9s mode IGU (type III) et mode IRS (type IV).<\/p>\n

Or, force est de constater que les micropieux type III sont ceux qui donnent les r\u00e9sultats d\u2019essais les plus variables en ce qui concerne le frottement axial : ils sont en effet fortement tributaires du temps d\u2019attente entre le remplissage du coulis de gaine et l\u2019injection d\u2019un deuxi\u00e8me coulis sous pression dans le forage.<\/p>\n

Le pr\u00e9sent article traite d\u2019un nouveau type de micropieu propos\u00e9 par Soletanche Bachy, intitul\u00e9 micropieu sous Injection de Serrage Unitaire, dit micropieu ISU, qui a pour cons\u00e9quence la suppression de ce temps d\u2019attente et l\u2019am\u00e9lioration de la r\u00e9sistance des micropieux inject\u00e9s. Ce nouveau proc\u00e9d\u00e9 est particuli\u00e8rement efficace en compl\u00e9ment de techniques autofor\u00e9es et Hi\u2019Drill\u00ae.<\/p>\n

Cette innovation fait l\u2019objet d\u2019un Cahier des Charges Particulier, initialement valid\u00e9 par Bureau Veritas, puis \u00e9valu\u00e9 et valid\u00e9 par l\u2019Ifsttar et le Cerema. Enfin, \u00e0 noter que ce proc\u00e9d\u00e9 a re\u00e7u le prix de l\u2019innovation VINCI<\/a>, r\u00e9gion \u00cele de- France, lors de la derni\u00e8re \u00e9dition, dans la cat\u00e9gorie \u00a0\u00bb proc\u00e9d\u00e9s et techniques\u00a0\u00bb.<\/p>\n

Vous souhaitez en savoir plus ? Lire l\u2019article ci-dessous.<\/p>\n<\/div>

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<\/i>Comment innover avec des micropieux? Lire l’article complet<\/span><\/a><\/div>
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