{"id":6069,"date":"2022-06-30T08:38:28","date_gmt":"2022-06-30T06:38:28","guid":{"rendered":"https:\/\/dbvib-consulting.com\/?p=6069"},"modified":"2023-08-30T14:37:20","modified_gmt":"2023-08-30T12:37:20","slug":"etude-des-impacts-acoustiques-step-de-villefranche-sur-saone","status":"publish","type":"post","link":"https:\/\/dbvib-consulting.com\/etude-des-impacts-acoustiques-step-de-villefranche-sur-saone\/","title":{"rendered":"Etude des impacts acoustiques STEP"},"content":{"rendered":"<h2><strong>Etude des impacts acoustiques STEP de Villefranche sur Sa\u00f4ne<\/strong><\/h2>\n<p>OTV, filiale V\u00e9olia, en charge de la requalification de la station d&rsquo;\u00e9puration des eaux us\u00e9es (STEP) de Villefranche sur Sa\u00f4ne a fait appel \u00e0 dB Vib Consulting pour \u00e9tudier les impacts acoustiques de la future installation.<\/p>\n<p>L\u2019\u00e9tude r\u00e9alis\u00e9e par dB Vib Consulting consiste \u00e0 mod\u00e9liser d&rsquo;une part le projet ext\u00e9rieur (site, topographie, b\u00e2timents, sources sonores). Ensuite de calculer l\u2019impact acoustique chez les riverains proches et en limite de propri\u00e9t\u00e9.<\/p>\n<p>A partir des r\u00e9sultats obtenus par cette simulation, les acousticiens dB Vib ont pu d\u00e9finir les traitements acoustiques optimaux pour respecter les niveaux sonores r\u00e9glementaires dans l\u2019environnement.<\/p>\n<p>&nbsp;<\/p>\n<h2><strong>Rappels r\u00e9glementaires STEP:<\/strong><\/h2>\n<p>En mati\u00e8re de nuisances sonores, une STEP doit se conformer \u00e0 3 r\u00e9glementations\u00a0:<\/p>\n<ul>\n<li>La r\u00e9glementation ICPE (Installation Class\u00e9e pour la Protection de l\u2019Environnement) qui d\u00e9finit les zones d\u2019\u00e9mergence sonore r\u00e9glement\u00e9e (ZER) et les niveaux de bruit admissibles en limite de propri\u00e9t\u00e9 :<img decoding=\"async\" class=\"aligncenter wp-image-6093\" title=\"r\u00e9glementation ICPE\" src=\"https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/Rappel-reglementaire.png\" alt=\"r\u00e9glementation ICPE\" width=\"478\" height=\"312\" srcset=\"https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/Rappel-reglementaire.png 1292w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/Rappel-reglementaire-300x196.png 300w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/Rappel-reglementaire-1024x668.png 1024w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/Rappel-reglementaire-768x501.png 768w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/Rappel-reglementaire-900x587.png 900w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/Rappel-reglementaire-440x287.png 440w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/Rappel-reglementaire-200x130.png 200w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/Rappel-reglementaire-315x206.png 315w\" sizes=\"(max-width: 478px) 100vw, 478px\" \/><\/li>\n<\/ul>\n<ul>\n<li><strong>Ou le code de sant\u00e9 publique<\/strong> qui d\u00e9finit les niveaux d\u2019\u00e9mergences sonores admissible en voisinage de l\u2019installation\n<ul>\n<li><strong>Emergence globale :<\/strong> L\u2019\u00e9mergence globale dans un lieu donn\u00e9 est d\u00e9finie par la diff\u00e9rence entre le niveau de bruit ambiant, comportant le bruit particulier en cause, et le niveau du bruit r\u00e9siduel constitu\u00e9 par l\u2019ensemble des bruits habituels, ext\u00e9rieurs et int\u00e9rieurs, correspondant \u00e0 l\u2019occupation normale des locaux et au fonctionnement habituel des \u00e9quipements, en l\u2019absence du bruit particulier en cause. Selon l\u2019article R.1336-7, les valeurs limites de l\u2019\u00e9mergence sont de 5 d\u00e9cibels A en p\u00e9riode diurne (de 7 heures \u00e0 22 heures) et de 3 dB (A) en p\u00e9riode nocturne (de 22 heures \u00e0 7 heures), valeurs auxquelles s\u2019ajoute un terme correctif en dB (A), fonction de la dur\u00e9e cumul\u00e9e d\u2019apparition du bruit particulier, selon le tableau ci-apr\u00e8s :<\/li>\n<li><strong>Emergence spectrale\u00a0:<\/strong> selon l\u2019article R. 1336-8, les valeurs limites de l&rsquo;\u00e9mergence spectrale sont de 7 dB dans les bandes d&rsquo;octave normalis\u00e9es centr\u00e9es sur 125 Hz et 250 Hz et de 5 dB dans les bandes d&rsquo;octaves normalis\u00e9es centr\u00e9es sur 500 Hz, 1 000 Hz, 2 000 Hz et 4 000 Hz.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-6089\" title=\"r\u00e9glementation ICPE\" src=\"https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/emergence-globale.png\" alt=\"r\u00e9glementation ICPE\" width=\"691\" height=\"162\" srcset=\"https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/emergence-globale.png 1272w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/emergence-globale-300x70.png 300w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/emergence-globale-1024x240.png 1024w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/emergence-globale-768x180.png 768w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/emergence-globale-900x211.png 900w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/emergence-globale-440x103.png 440w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/emergence-globale-200x47.png 200w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/emergence-globale-315x74.png 315w\" sizes=\"(max-width: 691px) 100vw, 691px\" \/><\/p>\n<ul>\n<li><strong>Le code du travail<\/strong> qui d\u00e9finit les conditions d\u2019expositions au bruit des travailleurs : Le niveau maximum de bruit dans les locaux o\u00f9 ls travailleurs sont amen\u00e9s \u00e0 intervenir r\u00e9guli\u00e8rement est limit\u00e9 \u00e0 80 dB(A). Si un niveau inf\u00e9rieur \u00e0 80dB(A) ne peut \u00eatre obtenu des protections individuelles doivent \u00eatre pr\u00e9vues.<\/li>\n<\/ul>\n<h2><strong>Simulation\u00a0 acoustique en ext\u00e9rieur de la future installation :<\/strong><\/h2>\n<p>Pour simuler les impacts acoustiques de la future installation, les acousticiens dB Vib commencent par mod\u00e9liser le site industriel en utilisant le logiciel IMMI.<\/p>\n<p>Cette mod\u00e9lisation consiste \u00e0 repr\u00e9senter la future installation en 2D et 3D (topographie, b\u00e2timents\u2026). En effet, cela permet de positionner les principales sources sonores du site.<br \/>\nPour chacune de ces sources la mod\u00e9lisation int\u00e8gre leur niveau de puissance et pression acoustique. Ensuite il s\u2019agit de d\u00e9finir sur le mod\u00e8le les points de mesures :<\/p>\n<ul>\n<li>En limite de propri\u00e9t\u00e9 d\u00e9finis par la r\u00e9glementation<\/li>\n<li>Avec un objectifs de niveau maximum de bruit autoris\u00e9 par la contribution de l\u2019installation consid\u00e9r\u00e9e.<\/li>\n<\/ul>\n<p>Une fois la mod\u00e9lisation du site termin\u00e9e, l\u2019acousticien ajoute des traitements acoustiques sur chacune des sources sonores selon des hypoth\u00e8ses :<\/p>\n<ul>\n<li>Par simulations<\/li>\n<li>Par it\u00e9rations successives<\/li>\n<\/ul>\n<p>Et ce, jusqu\u2019\u00e0 l\u2019obtention de r\u00e9sultats satisfaisants aux crit\u00e8res r\u00e9glementaires.<\/p>\n<h2><strong>Simulation acoustique en int\u00e9rieur des locaux \u00e0 proximit\u00e9 des sources sonores\u00a0:<\/strong><\/h2>\n<p>Pour simuler les niveaux de bruits dans les locaux de la future installation, les acousticiens dB Vib mod\u00e9lisent chaque local \u00e0 proximit\u00e9 des sources sonores principales. Il a \u00e9t\u00e9 n\u00e9cessaire d&rsquo;utiliser le logiciel ACOUBAT pour cette simulation.<\/p>\n<p>Une fois les sources sonores et leur niveau de puissance et pression acoustique positionn\u00e9es sur le mod\u00e8le. Les acousticiens ins\u00e8rent au mod\u00e8le les traitements acoustiques hypoth\u00e9tiques. Ensuite, par calculs v\u00e9rifient alors que le niveau de bruit obtenu dans le local est inf\u00e9rieur \u00e0 80dB(A). Il est \u00e0 noter que les niveaux sonores ainsi calcul\u00e9s ne tiennent pas compte des transferts solidiens du bruit. Afin de limiter ces transferts il sera donc n\u00e9cessaire de veiller \u00e0 :<\/p>\n<ul>\n<li>D\u00e9coupler les \u00e9quipements bruyants du sol<\/li>\n<li>Eviter tout contact avec les parois.<\/li>\n<\/ul>\n<h2><strong>Le rapport d\u2019\u00e9tudes\u00a0:<\/strong><\/h2>\n<p>A l\u2019issue de ces simulations, dB Vib Consulting \u00e9met un rapport contenant :<\/p>\n<ul>\n<li>Tous les niveaux de bruit obtenus en ext\u00e9rieur et en int\u00e9rieur,<\/li>\n<li>Les traitements acoustiques optimis\u00e9s.<\/li>\n<\/ul>\n<p>Pour chaque solution de traitement retenues par les acousticiens de dB Vib, le rapport comporte :<\/p>\n<ul>\n<li>Performances acoustiques<\/li>\n<li>Descriptions techniques<\/li>\n<\/ul>\n<p style=\"text-align: center\"><img decoding=\"async\" class=\"aligncenter wp-image-6091\" title=\"Cartographie acoustique\" src=\"https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/modelisation-acoustique-1.png\" alt=\"Cartographie acoustique\" width=\"493\" height=\"293\" srcset=\"https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/modelisation-acoustique-1.png 732w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/modelisation-acoustique-1-300x178.png 300w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/modelisation-acoustique-1-440x261.png 440w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/modelisation-acoustique-1-200x119.png 200w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/modelisation-acoustique-1-315x187.png 315w\" sizes=\"(max-width: 493px) 100vw, 493px\" \/><em>Cartographie acoustique ext\u00e9rieur \u00e0 l&rsquo;\u00e9tat initial sans les traitements acoustiques<\/em><\/p>\n<p style=\"text-align: center\"><em><img decoding=\"async\" class=\"aligncenter wp-image-6087\" title=\"Cartographie acoustique\" src=\"https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/cartographie-acoustique-e1656489945574.png\" alt=\"Cartographie acoustique\" width=\"496\" height=\"299\" srcset=\"https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/cartographie-acoustique-e1656489945574.png 731w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/cartographie-acoustique-e1656489945574-300x181.png 300w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/cartographie-acoustique-e1656489945574-440x265.png 440w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/cartographie-acoustique-e1656489945574-200x121.png 200w, https:\/\/dbvib-consulting.com\/uploads\/sites\/4\/2022\/06\/cartographie-acoustique-e1656489945574-315x190.png 315w\" sizes=\"(max-width: 496px) 100vw, 496px\" \/><\/em><em>Cartographie acoustique ext\u00e9rieur avec les traitements acoustiques<\/em><\/p>\n<p>A partir de ce rapport d\u2019\u00e9tudes, OTV peut alors lancer les appels d\u2019offres pour la mise en \u0153uvre des \u00e9quipements et solutions de traitements acoustiques, en incluant les pr\u00e9conisations de dB Vib Consulting dans ses cahiers des charges techniques.<\/p>\n<p>A l\u2019issue de cette consultation, OTV a retenu <a href=\"https:\/\/dbvib-ingenierie.com\/traitements-acoustiques-de-la-station-depuration-des-eaux-usees-de-villefranche-sur-saone\">dB Vib Ing\u00e9nierie<\/a> pour la r\u00e9alisation des solutions de traitements acoustiques de la station.<\/p>\n<p><a href=\"https:\/\/dbvib-consulting.com\/actualites\/\">D\u00e9couvrez nos autres actualit\u00e9s !\u00a0<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Etude des impacts acoustiques STEP de Villefranche sur Sa\u00f4ne OTV, filiale V\u00e9olia, en charge de la requalification de la station d&rsquo;\u00e9puration des eaux us\u00e9es (STEP) de Villefranche sur Sa\u00f4ne a fait appel \u00e0 dB Vib Consulting pour \u00e9tudier les impacts acoustiques de la future installation. L\u2019\u00e9tude r\u00e9alis\u00e9e par dB Vib Consulting consiste \u00e0 mod\u00e9liser d&rsquo;une [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":6115,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-6069","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Etude des impacts acoustiques STEP - dB Vib Consulting<\/title>\n<meta name=\"description\" content=\"L\u2019\u00e9tude r\u00e9alis\u00e9e par dB Vib Consulting consiste \u00e0 mod\u00e9liser le projet en ext\u00e9rieur (site, topographie, b\u00e2timents, sources sonores)\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dbvib-consulting.com\/etude-des-impacts-acoustiques-step-de-villefranche-sur-saone\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Etude des impacts acoustiques STEP - 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