{"id":16864,"date":"2011-07-04T17:15:48","date_gmt":"2011-07-04T15:15:48","guid":{"rendered":"https:\/\/www.uretek.ch\/?p=16864\/"},"modified":"2020-03-04T10:52:52","modified_gmt":"2020-03-04T09:52:52","slug":"la-tour-de-la-ville-perouse","status":"publish","type":"post","link":"https:\/\/www.uretek.ch\/fr\/la-tour-de-la-ville-perouse\/","title":{"rendered":"P\u00e9rouse: sauvetage de la tour de la ville"},"content":{"rendered":"<section class=\"l-section wpb_row height_small\"><div class=\"l-section-h i-cf\"><div class=\"g-cols vc_row via_flex valign_top type_default stacking_default\"><div class=\"vc_col-sm-12 wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"wpb_text_column us_custom_b737a1dc\"><div class=\"wpb_wrapper\"><h3>Le probl\u00e8me<\/h3>\n<p>La <strong>tour de la ville de Citt\u00e0 di Castello<\/strong> (Italie) est inclin\u00e9e d\u2019env. 70 cm. Cette situation engendre des valeurs tr\u00e8s proches de la valeur admissible maxi\u00admale en ce qui concerne l\u2019\u00e9quilibre de la tour. A cela s\u2019ajoute une aggravation de la situation provoqu\u00e9e par l\u2019essaim de s\u00e9ismes du mois de mars 2007.<\/p>\n<h3>La solution<\/h3>\n<p>Une intervention plus volumineuse, et par bien des aspects plus d\u00e9licate, \u00e9tait n\u00e9cessaire.\u00a0La tour m\u00e9di\u00e9vale est situ\u00e9e dans la vieille ville. L\u2019ouvrage est haut de 40 m\u00e8tres, et couvre une surface carr\u00e9e d\u2019environ 7 m\u00e8tres de c\u00f4t\u00e9.<\/p>\n<p>Pour pouvoir r\u00e9soudre le probl\u00e8me \u00e0 l\u2019aide de <strong>r\u00e9sine expansive (URETEK Deep lnjections<sup>\u00ae<\/sup>)<\/strong> les techniciens Uretek durent d\u2019abord d\u00e9terminer la m\u00e9thode optimale apr\u00e8s une analyse minutieuse\u00a0: Les donn\u00e9es de d\u00e9part \u00e0 transf\u00e9rer dans un mod\u00e8le 3D d\u2019\u00e9l\u00e9ments finis furent d\u00e9termin\u00e9es \u00e0 l\u2019aide du <strong>syst\u00e8me de calcul URETEK.<\/strong> Divers calculs permirent d\u2019\u00e9valuer le comportement du b\u00e2timent durant les diff\u00e9rentes phases d\u2019injection pr\u00e9vues. La fondation en b\u00e9ton simple de la tour est compos\u00e9e de mortier de ciment, comportant des fragments de calcar\u00e9nite, de gr\u00e8s et de galets. Les fondations (larges de 1,4 m\u00e8tre et profondes de 2,8 m\u00e8tres) reposent sur une assise d\u2019argile et de sable boueux.<\/p>\n<p>Suite \u00e0 l\u2019aggravation de la situation provoqu\u00e9e par l\u2019essaim de s\u00e9ismes, la tour fut soumise \u00e0 des tensions.<\/p>\n<p>La saisie des donn\u00e9es dans le syst\u00e8me de calcul permet de chiffrer le degr\u00e9 d\u2019am\u00e9lioration des propri\u00e9t\u00e9s de l\u2019ouvrage en injectant de la r\u00e9sine expansive, et en faisant usage d\u2019une technique de URETEK Deep Injections<sup>\u00ae<\/sup>.\u00a0Le mod\u00e8le se montra particuli\u00e8rement utile pour d\u00e9terminer la quantit\u00e9 de r\u00e9sine \u00e0 injecter, ainsi que les s\u00e9quences d\u2019injection, la r\u00e9partition du mat\u00e9riau et la profondeur d\u2019application dans l\u2019assise.<\/p>\n<p>L\u2019intervention eut alors lieu : des <strong>trous furent for\u00e9s<\/strong> jusqu\u2019\u00e0 4,5 m\u00e8tres sous la semelle de fondation,\u00a0pour proc\u00e9der \u00e0 <strong>l\u2019injection de la r\u00e9sine<\/strong> dans environ la moiti\u00e9 de la surface sur laquelle reposait la tour.<\/p>\n<h3>Le r\u00e9sultat<\/h3>\n<p>La r\u00e9sine inject\u00e9e connut un ph\u00e9nom\u00e8ne d\u2019expansion et <strong>compacta l\u2019assise<\/strong> de la tour, permettant ainsi de <strong>r\u00e9duire les risques d\u2019un tassement suppl\u00e9mentaire.<\/strong>\u00a0Les r\u00e9sultats des \u00e9tudes r\u00e9alis\u00e9es et des essais au p\u00e9n\u00e9trom\u00e8tre permirent de confirmer le <strong>succ\u00e8s de l\u2019intervention.<\/strong> S\u00e9curit\u00e9 et r\u00e9sistance purent \u00eatre am\u00e9lior\u00e9es de fa\u00e7on consid\u00e9rable.<\/p>\n<p>Les r\u00e9sultats correspondent totalement aux calculs pr\u00e9visionnels du projet.<\/p>\n<p><strong>Ci-apr\u00e8s quelques sch\u00e9mas de l\u2019analyse tridimensionnelle, dans le cadre des interventions de consolidation\u00a0du sous-sol d\u2019assise de la tour.<\/strong><\/p>\n<\/div><\/div><div class=\"g-cols wpb_row via_flex valign_top type_boxes stacking_default\" style=\"--additional-gap:25px;\"><div class=\"vc_col-sm-6 wpb_column vc_column_container has_bg_color\"><div class=\"vc_column-inner us_custom_9f274f1b\"><div class=\"wpb_wrapper\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h3>Analyses<\/h3>\n<\/div><\/div><div class=\"w-image align_none meta_simple\"><a ref=\"magnificPopup\" href=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre1_1000px.jpg\" aria-label=\"Illustration repr\u00e9sentant les donn\u00e9es de d\u00e9part sur lesquelles reposait le mod\u00e8le de traitement des injections prescrites dans ce cas : stratification du terrain et inclinaison de la tour.\" class=\"w-image-h\"><img decoding=\"async\" width=\"1000\" height=\"787\" src=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre1_1000px.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre1_1000px.jpg 1000w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre1_1000px-450x354.jpg 450w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre1_1000px-768x604.jpg 768w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre1_1000px-600x472.jpg 600w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><div class=\"w-image-meta\"><div class=\"w-image-title\">Illustration repr\u00e9sentant les donn\u00e9es de d\u00e9part sur lesquelles reposait le mod\u00e8le de traitement des injections prescrites dans ce cas : stratification du terrain et inclinaison de la tour.<\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vc_col-sm-6 wpb_column vc_column_container has_bg_color\"><div class=\"vc_column-inner us_custom_9f274f1b\"><div class=\"wpb_wrapper\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h3>Intervention<\/h3>\n<\/div><\/div><div class=\"w-image align_none meta_simple\"><a ref=\"magnificPopup\" href=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre2_1000px.jpg\" aria-label=\"Projection horizontale de la r\u00e9partition des injections et des points de contr\u00f4le\" class=\"w-image-h\"><img decoding=\"async\" width=\"1000\" height=\"787\" src=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre2_1000px.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre2_1000px.jpg 1000w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre2_1000px-450x354.jpg 450w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre2_1000px-768x604.jpg 768w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre2_1000px-600x472.jpg 600w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><div class=\"w-image-meta\"><div class=\"w-image-title\">Projection horizontale de la r\u00e9partition des injections et des points de contr\u00f4le<\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"g-cols wpb_row via_flex valign_top type_boxes stacking_default\" style=\"--additional-gap:25px;\"><div class=\"vc_col-sm-6 wpb_column vc_column_container has_bg_color\"><div class=\"vc_column-inner us_custom_9f274f1b\"><div class=\"wpb_wrapper\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h3>Avant l\u2019intervention<\/h3>\n<\/div><\/div><div class=\"w-image align_none meta_simple\"><a ref=\"magnificPopup\" href=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre4_1000px.jpg\" aria-label=\"Bulbe de pression, section longitudinale de la tour avant l\u2019intervention.\" class=\"w-image-h\"><img decoding=\"async\" width=\"1000\" height=\"751\" src=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre4_1000px.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre4_1000px.jpg 1000w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre4_1000px-450x338.jpg 450w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre4_1000px-768x577.jpg 768w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre4_1000px-600x451.jpg 600w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><div class=\"w-image-meta\"><div class=\"w-image-title\">Bulbe de pression, section longitudinale de la tour avant l\u2019intervention.<\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vc_col-sm-6 wpb_column vc_column_container has_bg_color\"><div class=\"vc_column-inner us_custom_9f274f1b\"><div class=\"wpb_wrapper\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h3>Apr\u00e8s l\u2019intervention<\/h3>\n<\/div><\/div><div class=\"w-image align_none meta_simple\"><a ref=\"magnificPopup\" href=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre5bis_1000px.jpg\" aria-label=\"Bulbe de pression, section longitudinale de la tour apr\u00e8s l\u2019intervention. (Il reste \u00e0 d\u00e9terminer si l\u2019intervention a engendr\u00e9 une am\u00e9lioration des facteurs de charge. La coupe relative de la variable de r\u00e9f\u00e9rence a connu une r\u00e9duction d\u2019env. 40% par rapport aux conditions avant l\u2019intervention en question).\" class=\"w-image-h\"><img decoding=\"async\" width=\"1000\" height=\"751\" src=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre5bis_1000px.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre5bis_1000px.jpg 1000w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre5bis_1000px-450x338.jpg 450w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre5bis_1000px-768x577.jpg 768w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/03\/schema-torre5bis_1000px-600x451.jpg 600w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><div class=\"w-image-meta\"><div class=\"w-image-title\">Bulbe de pression, section longitudinale de la tour apr\u00e8s l\u2019intervention. (Il reste \u00e0 d\u00e9terminer si l\u2019intervention a engendr\u00e9 une am\u00e9lioration des facteurs de charge. La coupe relative de la variable de r\u00e9f\u00e9rence a connu une r\u00e9duction d\u2019env. 40% par rapport aux conditions avant l\u2019intervention en question).<\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"g-cols wpb_row via_flex valign_top type_boxes stacking_default\" style=\"--additional-gap:25px;\"><div class=\"vc_col-sm-12 wpb_column vc_column_container has_bg_color\"><div class=\"vc_column-inner us_custom_9f274f1b\"><div class=\"wpb_wrapper\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h3>R\u00e9sultat<\/h3>\n<\/div><\/div><div class=\"w-image align_none meta_simple\"><a ref=\"magnificPopup\" href=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2011\/07\/Torre-civica-Citta-di-C11A-fr-1.jpg\" aria-label=\"Sch\u00e9ma des tassements par rapport au temps. Le sch\u00e9ma repr\u00e9sente les tassements relatifs \u00e0 partir d\u2019une date pr\u00e9\u00adc\u00e9dant l\u2019in\u00adjection, et jusqu\u2019au mois de mai 2008.\" class=\"w-image-h\"><img decoding=\"async\" width=\"1000\" height=\"549\" src=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2011\/07\/Torre-civica-Citta-di-C11A-fr-1.jpg\" class=\"attachment-full size-full\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2011\/07\/Torre-civica-Citta-di-C11A-fr-1.jpg 1000w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2011\/07\/Torre-civica-Citta-di-C11A-fr-1-450x247.jpg 450w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2011\/07\/Torre-civica-Citta-di-C11A-fr-1-768x422.jpg 768w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2011\/07\/Torre-civica-Citta-di-C11A-fr-1-600x329.jpg 600w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><div class=\"w-image-meta\"><div class=\"w-image-title\">Sch\u00e9ma des tassements par rapport au temps. Le sch\u00e9ma repr\u00e9sente les tassements relatifs \u00e0 partir d\u2019une date pr\u00e9\u00adc\u00e9dant l\u2019in\u00adjection, et jusqu\u2019au mois de mai 2008.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"w-separator size_medium with_line width_default thick_2 style_solid color_border align_center\"><div class=\"w-separator-h\"><\/div><\/div><div class=\"g-cols wpb_row via_flex valign_top type_default stacking_default\"><div class=\"vc_col-sm-12 wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"w-separator size_small\"><\/div><div class=\"w-sharing type_solid align_none color_default\"><div class=\"w-sharing-list\"><a class=\"w-sharing-item email\" href=\"mailto:?subject=P\u00e9rouse: sauvetage de la tour de la ville&amp;body=https:\/\/www.uretek.ch\/fr\/wp-json\/wp\/v2\/posts\/16864\" title=\"Envoyer ceci par courriel\" aria-label=\"Envoyer ceci par courriel\"><i class=\"fas fa-envelope\"><\/i><\/a><a 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class=\"form_spacer\">\n\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-subject\"><input size=\"40\" maxlength=\"80\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" placeholder=\"Objet\" value=\"\" type=\"text\" name=\"your-subject\" \/><\/span>\n\t<\/p>\n<\/div>\n<div class=\"form_spacer\">\n\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-message\"><textarea cols=\"40\" rows=\"10\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-textarea\" aria-invalid=\"false\" placeholder=\"Votre message\" name=\"your-message\"><\/textarea><\/span>\n\t<\/p>\n<\/div>\n<div class=\"form_spacer\" style=\"font-size:0.9rem;\">\n\t<p>Pour vous prot\u00e9ger contre le spam, veuillez r\u00e9pondre \u00e0 la question suivante\u00a0: <span class=\"wpcf7-form-control-wrap\" data-name=\"quiz-861\"><label><span class=\"wpcf7-quiz-label\">huit + trois = ? (nombre comme mot)<\/span> <input size=\"40\" class=\"wpcf7-form-control wpcf7-quiz\" autocomplete=\"off\" aria-required=\"true\" aria-invalid=\"false\" type=\"text\" name=\"quiz-861\" \/><\/label><input type=\"hidden\" name=\"_wpcf7_quiz_answer_quiz-861\" value=\"d2b7c29487ee5880eb26a733b420b8e8\" \/><\/span>\n\t<\/p>\n<\/div>\n<div id=\"anfrage\">\n\t<p><input class=\"wpcf7-form-control wpcf7-submit has-spinner\" type=\"submit\" value=\"Envoyer\" \/>\n\t<\/p>\n<\/div>\n<div class=\"form_spacer\">\n\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"acceptance-852\"><span class=\"wpcf7-form-control wpcf7-acceptance\"><span class=\"wpcf7-list-item\"><label><input type=\"checkbox\" name=\"acceptance-852\" value=\"1\" aria-invalid=\"false\" \/><span class=\"wpcf7-list-item-label\">Vous donnez votre accord pour que vos donn\u00e9es soient utilis\u00e9es pour le traitement de votre demande et d\u00e9clarez avoir pris connaissance de notre <a href=\"https:\/\/www.uretek.ch\/fr\/protection-des-donnees\/\" target=\"_blank\">d\u00e9claration de confidentialit\u00e9.<\/a> Vos donn\u00e9es de contact ne seront pas transmises \u00e0 des tiers.<\/span><\/label><\/span><\/span><\/span>\n\t<\/p>\n<\/div><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<\/form>\n<\/div>\n<\/div><\/div><\/div><div class=\"w-popup-closer\"><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\n<\/div><\/div><\/div><\/div><\/div><\/section>\n","protected":false},"excerpt":{"rendered":"Le probl\u00e8me La tour de la ville de Citt\u00e0 di Castello (Italie) est inclin\u00e9e d\u2019env. 70 cm. Cette situation engendre des valeurs tr\u00e8s proches de la valeur admissible maxi\u00admale en ce qui concerne l\u2019\u00e9quilibre de la tour. A cela s\u2019ajoute une aggravation de la situation provoqu\u00e9e par l\u2019essaim de s\u00e9ismes du mois de mars 2007....","protected":false},"author":1,"featured_media":16209,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[221],"tags":[],"class_list":["post-16864","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles-techniques-fr"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Sauvetage de la tour de la ville \u00bb URETEK Schweiz AG<\/title>\n<meta name=\"description\" content=\"La r\u00e9sine inject\u00e9e connut un ph\u00e9nom\u00e8ne d\u2019expansion et compacta l\u2019assise de la tour, permettant ainsi de r\u00e9duire les risques d\u2019un tassement suppl\u00e9mentaire.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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