{"id":427,"date":"2013-09-12T22:00:04","date_gmt":"2013-09-12T21:00:04","guid":{"rendered":"http:\/\/www.speleologie.ch\/mdemierre\/?p=427"},"modified":"2026-05-14T16:06:28","modified_gmt":"2026-05-14T15:06:28","slug":"ventilation","status":"publish","type":"post","link":"https:\/\/www.techt.ch\/mdemierre\/?p=427","title":{"rendered":"Ventilation artificielle en souterrain"},"content":{"rendered":"<p>Lors de minages en souterrain, dans les milieux confin\u00e9s, ou en pr\u00e9sence de gaz toxiques, il est parfois n\u00e9cessaire de mettre en place une ventilation artificielle, en aspiration ou en insufflation selon la configuration.<\/p>\n<p style=\"text-align: center;\">ngg_shortcode_0_placeholder<br \/>\n<em>Source : Institut National de Recherche et S\u00e9curit\u00e9<\/em><\/p>\n<p>La technique que nous utilisons est bas\u00e9e sur des gaines en plastiques flexibles et un ventilateur \u00e9lectrique. En soufflage, il faut \u00eatre particuli\u00e8rement prudent avec le d\u00e9placement des gaz toxiques et les intoxications \u00e0 distance sur le trajet du courant d&rsquo;air. Sur la vid\u00e9o ci-dessous, la stratification des gaz et poussi\u00e8res est clairement visible.<\/p>\n<div class=\"ast-oembed-container \" style=\"height: 100%;\"><iframe loading=\"lazy\" title=\"Ventilation par gaine flexible\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/lIkRT6qsAhU?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><\/div>\n<p>Comme ventilateur, un aspirateur-souffleur \u00e9lectrique de 1100 Watts pour un poids de 3 Kg, initialement con\u00e7u\u00a0comme souffleur \u00e0 feuilles, est utilis\u00e9. Il peut donner des d\u00e9bits de plus de 1000 m3\/heure; ce qui est tr\u00e8s largement suffisant pour pouvoir a\u00e9rer tr\u00e8s rapidement les faibles volumes des cavit\u00e9s confin\u00e9es. Il existe d&rsquo;autres solutions plus on\u00e9reuses et moins performantes. \ud83d\ude09<\/p>\n<p><img decoding=\"async\" class=\"ngg-singlepic ngg-center aligncenter\" src=\"http:\/\/www.speleologie.ch\/mdemierre\/wp-content\/gallery\/ventilation\/ventilation.jpg\" alt=\"ventilation\" \/><\/p>\n<p>Il peut \u00eatre aliment\u00e9 par une petite g\u00e9n\u00e9ratrice Honda HU20E. Sa technologie inverter permet de limiter son poids et maximiser son autonomie gr\u00e2ce au mode \u00ab\u00a0lapin-tortue\u00a0\u00bb g\u00e9rant le r\u00e9gime moteur.<\/p>\n<p>Des gaines plastiques en poly\u00e9thyl\u00e8ne basse-densit\u00e9 utilis\u00e9es pour l&#8217;emballage sont bien adapt\u00e9 \u00e0 la ventilation (par exemple en provenance de Rajapack). Elles sont l\u00e9g\u00e8res, facile \u00e0 mettre en \u0153uvre et bon march\u00e9. Il faut compter par exemple moins de 100.- CHF pour 350 m\u00e8tres de gaines de 10 cm de diam\u00e8tre\u00a0(largeur 160 cm -&gt;\u00a0diam\u00e8tre 10 cm). Pour de grandes longueurs, bien plus de 100 m\u00e8tres, la gaine de diam\u00e8tre 20 cm peut s&rsquo;av\u00e9rer pr\u00e9f\u00e9rable pour limiter les pertes de charge.<\/p>\n<p><img decoding=\"async\" class=\"ngg-singlepic ngg-center aligncenter\" src=\"http:\/\/www.speleologie.ch\/mdemierre\/wp-content\/gallery\/ventilation\/gaine_plastique.jpg\" alt=\"gaine_plastique\" \/><\/p>\n<p>Des turbulences, g\u00e9n\u00e9rant des oscillations du tuyau bruyantes,\u00a0peuvent \u00eatre produites au passage de coudes de la gaine ou \u00e0 l\u2019extr\u00e9mit\u00e9 du tuyau. Ces turbulences peuvent \u00eatre r\u00e9duites en diminuant la section de la conduite \u00e0 son extr\u00e9mit\u00e9 libre.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Lors de minages en souterrain, dans les milieux confin\u00e9s, ou en pr\u00e9sence de gaz toxiques, il est parfois n\u00e9cessaire de [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":438,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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