{"id":21411,"date":"2021-04-14T11:12:18","date_gmt":"2021-04-14T09:12:18","guid":{"rendered":"https:\/\/mcrtecresa.com\/concrete-protection-inside-tunnels-with-tecbor-boards"},"modified":"2025-10-22T13:42:43","modified_gmt":"2025-10-22T11:42:43","slug":"protection-du-beton-dans-les-tunnels-grace-aux-panneaux-tecbor","status":"publish","type":"post","link":"https:\/\/mcrtecresa.com\/fr\/blog\/protection-du-beton-dans-les-tunnels-grace-aux-panneaux-tecbor","title":{"rendered":"Protection du b\u00e9ton contre les incendies dans les tunnels gr\u00e2ce aux Panneaux Tecbor\u00ae"},"content":{"rendered":"<p style=\"text-align: justify;\">Il est g\u00e9n\u00e9ralement suppos\u00e9 que le b\u00e9ton arm\u00e9 pr\u00e9sente une r\u00e9sistance au feu tr\u00e8s \u00e9lev\u00e9e. Ceci n&rsquo;est vrai que dans pour des \u00e9l\u00e9ments de forte \u00e9paisseur et avec des \u00e9paisseurs de recouvrement \u00e9galement tr\u00e8s \u00e9lev\u00e9es. Aujourd\u2019hui, les constructions se basent sur les sections minimales recommand\u00e9es par la norme et, dans certains cas, comme pour les tunnels, <strong>il est n\u00e9cessaire de prot\u00e9ger le b\u00e9ton<\/strong> afin d\u2019\u00e9viter tout risque d\u2019\u00e9croulement en cas d\u2019incendie.<\/p>\n<h2><strong>Quelle r\u00e9glementation devrions-nous respecter?<\/strong><\/h2>\n<p style=\"text-align: justify;\"><strong>There is not a mandatory compliance regulation in Spain<\/strong> regarding the tunnels protection. We can just find <strong>CE recommendations<\/strong> to use other countries\u2019 standards (France, Germany and Holland). It is the planner duty and decision to adapt the project to one of those fire protection regulations of structural elements (essentially, concrete), smoke evacuation systems, escaping routes, ets\u2026<\/p>\n<p style=\"text-align: justify;\"><strong>En Espagne, il n&rsquo;existe pas de r\u00e9glementation obligatoire<\/strong> \u00e0 ce sujet, mais <strong>seulement les recommandations de l\u2019UE<\/strong> qui stipule d\u2019utiliser les r\u00e8glementations obligatoires existantes dans les Etats membres tels que la France, l\u2019Allemagne et les Pays-Bas. C&rsquo;est ensuite de la responsabilit\u00e9 du responsable du projet de s\u2019adapter \u00e0 ces r\u00e8gles de protection au feu \u00e0 la fois pour les \u00e9l\u00e9ments structurels (principalement le b\u00e9ton) mais aussi pour les syst\u00e8mes de d\u00e9senfumage, voies d&rsquo;\u00e9vacuation, etc.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\">Le probl\u00e8me est que les \u00e9paisseurs et les rev\u00eatements des armatures sont conformes au CTE, mais lorsqu&rsquo;un incendie se d\u00e9veloppe dans les tunnels, \u00e0 la fois de par les \u00e9l\u00e9ments combustibles impliqu\u00e9s (v\u00e9hicules avec des r\u00e9servoirs de carburant, camions avec des produits inflammables, camion-citerne pour le transport de carburant, etc.) mais aussi des caract\u00e9ristiques du tunnel lui-m\u00eame, cela se transforme en un <strong>vrai four<\/strong>. Cela signifie que des <strong>mesures sp\u00e9ciales<\/strong> doivent \u00eatre adopt\u00e9es pour la protection incendie du b\u00e9ton. La courbe de feu standard ISO utilis\u00e9e dans la construction ici ne peut s\u2019appliquer. D&rsquo;autres pays qui comptent malheureusement de nombreux d\u00e9c\u00e8s dus \u00e0 des accidents dans les tunnels, utilisent des courbes de temp\u00e9rature beaucoup plus exigeantes. En Allemagne, on trouve la <strong>RABT\/ZTV<\/strong>; en France, la <strong>HCM<\/strong>, qui correspond \u00e0 la courbe Hydrocarbures multipli\u00e9e par un facteur de 13\/11 en raison du confinement sp\u00e9cial de l&rsquo;incendie; aux Pays-Bas, le <strong>Rigswaterstaat<\/strong> ou <strong>RWS<\/strong>, qui est bas\u00e9 sur un test r\u00e9el dans un tunnel soumis \u00e0 un incendie d\u2019un camion-citerne charg\u00e9 de 50 000 litres de combustible pendant deux heures. Ce dernier est celui qui a la temp\u00e9rature la plus \u00e9lev\u00e9e : <strong>1350\u00ba C<\/strong>.<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" title=\"courbe de feu \" src=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2018\/08\/curva-RWS-300x166.jpg\" alt=\"courbe de feu\" width=\"535\" height=\"296\" \/><\/p>\n<h2><strong>L&rsquo;effect spalling<\/strong><\/h2>\n<p style=\"text-align: justify;\">Il existe un ph\u00e9nom\u00e8ne particulier qui se produit dans le b\u00e9ton lorsqu&rsquo;il est soumis \u00e0 une augmentation rapide de la temp\u00e9rature : l\u2019effet <strong>SPALLING.<\/strong> Cet effet produit un \u00e9caillage important sur la partie du b\u00e9ton expos\u00e9e au feu, et pr\u00e9c\u00e8de g\u00e9n\u00e9ralement une explosion projetant des morceaux de b\u00e9ton comme des \u00e9clats d&rsquo;obus.<\/p>\n<p style=\"text-align: justify;\">\u00c0 une temp\u00e9rature d&rsquo;environ 400 \u00b0 C, l&rsquo;hydroxyde de calcium contenu dans le ciment du b\u00e9ton se d\u00e9shydrate et <strong>produit de la vapeur d&rsquo;eau<\/strong> selon la formule : Ca(OH)<sub>2\u00a0 <\/sub>&#8211;&gt;CaO + H<sub>2<\/sub>O<\/p>\n<p style=\"text-align: justify;\">Cela produit, d\u2019une part, la rupture des liaisons chimiques entre les mol\u00e9cules de ciment, ce qui entra\u00eene une perte de r\u00e9sistance du ciment. D&rsquo;autre part, de petites bulles d&rsquo;eau se cr\u00e9ent et se transforment en vapeur sur la partie expos\u00e9e. La pression exerc\u00e9e sur le mat\u00e9riau est tr\u00e8s importante et provoque son explosion, d\u00e9tachant des fragments dans un rayon proche de l&rsquo;\u00e9caillage. Pendant de temps, les armatures en acier du b\u00e9ton sont elles aussi expos\u00e9es au feu, ce qui diminue encore plus sa r\u00e9sistance.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-21402\" title=\"l'effect spallingt tunnel\" src=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2018\/08\/spalling-300x158.jpg\" alt=\"Spalling\" width=\"553\" height=\"291\" srcset=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2018\/08\/spalling-300x158.jpg 300w, https:\/\/mcrtecresa.com\/wp-content\/uploads\/2018\/08\/spalling.jpg 559w\" sizes=\"(max-width: 553px) 100vw, 553px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\">Au sein du d\u00e9partement R&amp;D de <strong>mercor <span style=\"color: #e42313;\">tecresa<\/span><sup>\u00ae<\/sup><\/strong>, nous travaillons et apportons des solutions \u00e0 ce probl\u00e8me depuis de nombreuses ann\u00e9es. Plusieurs solutions r\u00e9alis\u00e9es avec les <a href=\"https:\/\/mcrtecresa.com\/fr\/panneaux-tecbor\/tunnels\"><strong>Panneux Tecbor<sup>\u00ae<\/sup><\/strong><\/a> ont \u00e9t\u00e9 test\u00e9es en laboratoire et dans de v\u00e9ritables tunnels, pouvant garantir la <strong>r\u00e9sistance du b\u00e9ton pendant plus de 2 heures d&rsquo;exposition au feu<\/strong>. Dans la plupart des tests, nous avons utilis\u00e9 la courbe de feu hollandaise RWS pour sa temp\u00e9rature plus \u00e9lev\u00e9e et ainsi pouvoir couvrir les autres courbes utilis\u00e9es dans les autres pays.<\/p>\n<p style=\"text-align: justify;\">Une des solutions la plus utilis\u00e9e est celle r\u00e9alis\u00e9e avec une<a href=\"https:\/\/mcrtecresa.com\/fr\/panneaux-tecbor\/tunnels#faux-plafond-tunnel-tecborb23\"> Pannau Tecbor<sup>\u00ae<\/sup> de 23 mm<\/a> d\u2019\u00e9paisseur pour atteindre deux heures de r\u00e9sistance au feu sous une <strong>courbe RWS<\/strong> fix\u00e9e directement sur une dalle de b\u00e9ton de 120 mm. Cette plaque a \u00e9galement \u00e9t\u00e9 test\u00e9e en suspension, cr\u00e9ant un faux plafond et donnant comme r\u00e9sultat<strong> 180 minutes<\/strong> de protection sous la m\u00eame courbe RWS.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><iframe title=\"Paneles Tecbor\u00ae. Protecci\u00f3n elementos estructurales de hormig\u00f3n. &quot;Fijaci\u00f3n Directa&quot;\" width=\"810\" height=\"456\" src=\"https:\/\/www.youtube.com\/embed\/t-2tjtk8-mQ?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p style=\"text-align: center;\">\n","protected":false},"excerpt":{"rendered":"<p>Il est g\u00e9n\u00e9ralement suppos\u00e9 que le b\u00e9ton arm\u00e9 pr\u00e9sente une r\u00e9sistance au feu tr\u00e8s \u00e9lev\u00e9e. Ceci n&rsquo;est vrai que dans pour des \u00e9l\u00e9ments de forte \u00e9paisseur et avec des \u00e9paisseurs&#8230;<\/p>\n","protected":false},"author":2,"featured_media":13738,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[171],"tags":[],"class_list":["post-21411","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-produits-et-services"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Protection du b\u00e9ton dans les tunnels gr\u00e2ce aux Panneaux Tecbor\u00ae - mercor tecresa<\/title>\n<meta name=\"description\" content=\"En cas d&#039;incendie, les tunnels pr\u00e9sentent des exigences particuli\u00e8res en mati\u00e8re de protection du b\u00e9ton. Comment pouvons-nous le prot\u00e9ger et \u00e9viter ainsi tout risque d\u2019effondrement?\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mcrtecresa.com\/fr\/blog\/protection-du-beton-dans-les-tunnels-grace-aux-panneaux-tecbor\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Protection du b\u00e9ton dans les tunnels gr\u00e2ce aux Panneaux Tecbor\u00ae - mercor tecresa\" \/>\n<meta property=\"og:description\" content=\"En cas d&#039;incendie, les tunnels pr\u00e9sentent des exigences particuli\u00e8res en mati\u00e8re de protection du b\u00e9ton. 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