{"id":16935,"date":"2013-07-05T16:51:02","date_gmt":"2013-07-05T14:51:02","guid":{"rendered":"https:\/\/www.uretek.ch\/?p=16935\/"},"modified":"2020-03-03T18:59:12","modified_gmt":"2020-03-03T17:59:12","slug":"permeabilita-ridotta","status":"publish","type":"post","link":"https:\/\/www.uretek.ch\/it\/permeabilita-ridotta\/","title":{"rendered":"Permeabilit\u00e0 ridotta"},"content":{"rendered":"<section class=\"l-section wpb_row height_medium\"><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\"><div class=\"wpb_wrapper\"><p>(solo in francese)<\/p>\n<h4>Cet article int\u00e9ressant est le r\u00e9sultat de deux \u00e9tudes men\u00e9es en \u00adAustralie et en Italie. Les analyses montrent que \u00adl&#8217;injection de r\u00e9sines expansives URETEK ne permet pas seulement de \u00adconsolider le terrain, mais qu&#8217;elle am\u00e9liore \u00ad\u00e9galement le comportement hydraulique des sols, sensibles \u00e0 la \u00ads\u00e9cheresse et \u00e0 la \u00adr\u00e9hydratation.<\/h4>\n<h2>Effet des injections de r\u00e9sine expansive URETEK\u00a0sur les sols sensibles aux gonflements et retraits<\/h2>\n<h4>Drainage des eaux souterraines et r\u00e9duction de la perm\u00e9abilit\u00e9 de la masse structur\u00e9e du sol<\/h4>\n<\/div><\/div><div class=\"w-separator size_small\"><\/div><div class=\"g-cols wpb_row via_flex valign_top type_boxes stacking_default\" style=\"--additional-gap:25;\"><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=\"w-image align_none meta_simple\"><a ref=\"magnificPopup\" href=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Eindringen-des-Harzes-in-den-Boden.jpg\" aria-label=\"La p\u00e9n\u00e9tration de la r\u00e9sine dans le sol pr\u00e9sente diff\u00e9rents effets: remplissage des fissures dues au retrait, compactage par les injections de refoulement\" class=\"w-image-h\"><img decoding=\"async\" width=\"1024\" height=\"354\" src=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Eindringen-des-Harzes-in-den-Boden-1024x354.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Eindringen-des-Harzes-in-den-Boden-1024x354.jpg 1024w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Eindringen-des-Harzes-in-den-Boden-450x156.jpg 450w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Eindringen-des-Harzes-in-den-Boden-768x266.jpg 768w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Eindringen-des-Harzes-in-den-Boden-600x208.jpg 600w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Eindringen-des-Harzes-in-den-Boden.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><div class=\"w-image-meta\"><div class=\"w-image-title\">La p\u00e9n\u00e9tration de la r\u00e9sine dans le sol pr\u00e9sente diff\u00e9rents effets: remplissage des fissures dues au retrait, compactage par les injections de refoulement<\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"w-separator size_medium\"><\/div><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h2>Analyse 1:<\/h2>\n<p>Mod\u00e8le conceptuel d\u2019un traitement avec des r\u00e9sines expansives PU d\u2019argiles susceptibles de gonfler d\u00e9pos\u00e9es sous les sols de fondation.<\/p>\n<p><em>R\u00e9alis\u00e9 en Australie par: Olivier Buzzi, Stephen Fityus, Yasumasa Sasaki<\/em><br \/>\n<em>Centre for Geotechnical and Materials Modelling, School of Engineering, University of Newcastle, NSW 2008 Australie<\/em><\/p>\n<p><strong>Cette \u00e9tude a montr\u00e9 les \u00e9l\u00e9ments \u00adsuivants:<\/strong><\/p>\n<ol style=\"list-style-type: lower-alpha;\">\n<li>la r\u00e9sine p\u00e9n\u00e8tre dans les espaces vides jusqu&#8217;\u00e0 1\/10 mm et la zone de transition entre le sol et la r\u00e9sine \u00adatteint une \u00e9paisseur de 1 \u00e0 3 mm<\/li>\n<li>la p\u00e9n\u00e9tration de la r\u00e9sine \u00adexpansive URETEK dans les macropores va de pair avec une r\u00e9duction de la perm\u00e9abilit\u00e9 de la masse structur\u00e9e du sol<\/li>\n<\/ol>\n<p>L&#8217;\u00e9tude fait remarquer, que pour la \u00add\u00e9termination de la \u00adperm\u00e9abilit\u00e9 d&#8217;une couche de fondation, il ne convient pas d&#8217;analyser un \u00e9chantillon du sol, mais une masse structur\u00e9e de celui-ci. \u00a0L&#8217;importance de la prise en compte des caract\u00e9ristiques d&#8217;une masse \u00adstructur\u00e9e dans le sous-sol existant a \u00e9t\u00e9 \u00adprouv\u00e9e par le Bureau de Recherches G\u00e9ologiques et Mini\u00e8res, le Laboratoire Central des Ponts et Chauss\u00e9es et par l&#8217;\u00c9cole des Mines de Paris gr\u00e2ce \u00e0 des \u00e9tudes.<\/p>\n<p>Dans le cadre de l&#8217;analyse du retrait et du gonflement, ainsi que de leurs cons\u00e9quences sur les b\u00e2timents, il a \u00e9t\u00e9 possible de montrer la signification des comportements diff\u00e9rents des sols dans leur \u00e9tat d&#8217;origine, puis stabilis\u00e9s.<\/p>\n<p>L&#8217;\u00e9tude, gr\u00e2ce \u00e0 des analyses de \u00adperm\u00e9abilit\u00e9, a permis de conclure et de prouver que l&#8217;injection de r\u00e9sine peut r\u00e9duire la perm\u00e9abilit\u00e9 macroporeuse du sol d&#8217;environ 50% apr\u00e8s l&#8217;injection de la r\u00e9sine expansive URETEK et \u00adainsi induire une am\u00e9lioration essentielle du comportement \u00e0 la s\u00e9cheresse et la \u00adr\u00e9hydratation.<\/p>\n<p><strong>En outre, il a \u00e9galement \u00e9t\u00e9 constat\u00e9 que les injections ex\u00e9cut\u00e9es dans le cadre de la premi\u00e8re \u00e9tape de traitement avaient les effets suivants sur la transition entre le sous-sol et les fondations:<\/strong><\/p>\n<ol style=\"list-style-type: lower-alpha;\">\n<li>le remplissage des espaces directement sous les fondations, ainsi qu&#8217;une imperm\u00e9abilisation de cette zone<\/li>\n<li>le compactage du sous-sol permet une meilleure transmission des charges du b\u00e2timent et une consolidation du sol de fondation en fonction des charges b\u00e2ties pr\u00e9sentes<\/li>\n<\/ol>\n<\/div><\/div><div class=\"w-separator size_small\"><\/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=\"w-image align_none meta_simple\"><a ref=\"magnificPopup\" href=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Deuxiem-1.jpg\" aria-label=\"Agrandissement au microscope\" class=\"w-image-h\"><img decoding=\"async\" width=\"1000\" height=\"776\" src=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Deuxiem-1.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Deuxiem-1.jpg 1000w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Deuxiem-1-450x349.jpg 450w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Deuxiem-1-768x596.jpg 768w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Deuxiem-1-600x466.jpg 600w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><div class=\"w-image-meta\"><div class=\"w-image-title\">Agrandissement au microscope<\/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=\"w-image align_none meta_simple\"><a ref=\"magnificPopup\" href=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/02\/Reaktionen-einer-Mauerwerkstruktur_fr.jpg\" aria-label=\"R\u00e9actions d&#039;une structure ma\u00e7onn\u00e9e aux d\u00e9formations diff\u00e9rentielles d&#039;une fondation (Muniruzzaman, 1997)\" class=\"w-image-h\"><img decoding=\"async\" width=\"1000\" height=\"776\" src=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/02\/Reaktionen-einer-Mauerwerkstruktur_fr.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/02\/Reaktionen-einer-Mauerwerkstruktur_fr.jpg 1000w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/02\/Reaktionen-einer-Mauerwerkstruktur_fr-450x349.jpg 450w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/02\/Reaktionen-einer-Mauerwerkstruktur_fr-768x596.jpg 768w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/02\/Reaktionen-einer-Mauerwerkstruktur_fr-600x466.jpg 600w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><div class=\"w-image-meta\"><div class=\"w-image-title\">R\u00e9actions d'une structure ma\u00e7onn\u00e9e aux d\u00e9formations diff\u00e9rentielles d'une fondation (Muniruzzaman, 1997)<\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"w-separator size_medium\"><\/div><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h2>Analyse 2:<\/h2>\n<p>Consolidation du sol par injection de \u00adr\u00e9sine polyur\u00e9thane (URETEK Deep \u00adInjections<sup>\u00ae<\/sup>) pour ma\u00eetriser le \u00adgonflement et le retrait des sols argileux.<\/p>\n<p><em>R\u00e9alis\u00e9 en Italie par: Alberto Pasquetto (Uretek S.r.l.), Matteo Gabassi (Uretek S.r.l.), Gianluca Vinco (Uretek S.r.l.), Cristiano Guerra (Universit\u00e0 di Urbino\/Italie)<\/em><\/p>\n<p><strong>Cette \u00e9tude a \u00e9t\u00e9 pr\u00e9sent\u00e9e en 2008 lors du Symposium international sur la s\u00e9cheresse organis\u00e9 par le Laboratoire des Ponts et Chauss\u00e9es. Les r\u00e9sultats sont les suivants:<\/strong><\/p>\n<ol style=\"list-style-type: lower-alpha;\">\n<li>La densit\u00e9 accrue des sols trait\u00e9s par injection de r\u00e9sine expansive prot\u00e8ge contre le risque de grandes variations de volume \u00e0 l&#8217;avenir.<\/li>\n<li>Le refoulement des eaux souterraines gr\u00e2ce \u00e0 la r\u00e9sine r\u00e9duit consid\u00e9\u00adrable\u00adment le risque d&#8217;tassements \u00e0 l&#8217;avenir.<\/li>\n<\/ol>\n<p><strong>Le traitement par r\u00e9sine expansive \u00adURETEK a pour effet:<\/strong><\/p>\n<ol style=\"list-style-type: lower-alpha;\">\n<li>une r\u00e9sistance dynamique accrue du sol<\/li>\n<li>la saturation du sol avec de la r\u00e9sine et donc une r\u00e9duction de la teneur naturelle en eau<\/li>\n<\/ol>\n<p>Ces effets sont surtout visibles apr\u00e8s des p\u00e9riodes de grande s\u00e9cheresse, car le potentiel de retrait du sol est largement inf\u00e9rieur en p\u00e9riode s\u00e8che.<\/p>\n<\/div><\/div><div class=\"w-separator size_small\"><\/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=\"w-image align_none meta_simple\"><a ref=\"magnificPopup\" href=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/02\/Diagramm-fr_vor-nach-Injektion.jpg\" aria-label=\"Comparaison des r\u00e9sultats de sondages de compression avant et apr\u00e8s injection de 20 kg de r\u00e9sine expansive \u00e0 une profondeur de 2.8 m\" class=\"w-image-h\"><img decoding=\"async\" width=\"520\" height=\"800\" src=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/02\/Diagramm-fr_vor-nach-Injektion.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/02\/Diagramm-fr_vor-nach-Injektion.jpg 520w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/02\/Diagramm-fr_vor-nach-Injektion-293x450.jpg 293w\" sizes=\"auto, (max-width: 520px) 100vw, 520px\" \/><\/a><div class=\"w-image-meta\"><div class=\"w-image-title\">Comparaison des r\u00e9sultats de sondages de compression avant et apr\u00e8s injection de 20 kg de r\u00e9sine expansive \u00e0 une profondeur de 2.8 m<\/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=\"w-image align_none meta_simple\"><a ref=\"magnificPopup\" href=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/02\/Diagramm_fr_vor-nach-Trockenperiode.jpg\" aria-label=\"Comparaison des r\u00e9sultats de sondages de compression avant et apr\u00e8s une p\u00e9riode s\u00e8che\" class=\"w-image-h\"><img decoding=\"async\" width=\"520\" height=\"800\" src=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/02\/Diagramm_fr_vor-nach-Trockenperiode.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/02\/Diagramm_fr_vor-nach-Trockenperiode.jpg 520w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/02\/Diagramm_fr_vor-nach-Trockenperiode-293x450.jpg 293w\" sizes=\"auto, (max-width: 520px) 100vw, 520px\" \/><\/a><div class=\"w-image-meta\"><div class=\"w-image-title\">Comparaison des r\u00e9sultats de sondages de compression avant et apr\u00e8s une p\u00e9riode s\u00e8che<\/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 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aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Indirizzo e-mail*\" value=\"\" type=\"email\" name=\"email-72\" \/><\/span>\n\t<\/p>\n<\/div>\n<div 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=\"Riguardo\" 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=\"Messaggio\" name=\"your-message\"><\/textarea><\/span>\n\t<\/p>\n<\/div>\n<div class=\"form_spacer\" style=\"font-size:0.9rem;\">\n\t<p>Per proteggersi dallo spam, rispondi alla seguente domanda: <span class=\"wpcf7-form-control-wrap\" data-name=\"quiz-594\"><label><span class=\"wpcf7-quiz-label\">otto + tre = ? (numero come parola)<\/span> <input size=\"40\" class=\"wpcf7-form-control wpcf7-quiz\" autocomplete=\"off\" aria-required=\"true\" aria-invalid=\"false\" type=\"text\" name=\"quiz-594\" \/><\/label><input type=\"hidden\" name=\"_wpcf7_quiz_answer_quiz-594\" value=\"456d45dcf2b4645ab047dc3911619491\" \/><\/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=\"Invia modulo\" \/>\n\t<\/p>\n<\/div>\n<div class=\"form_spacer\">\n\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"acceptance-277\"><span class=\"wpcf7-form-control wpcf7-acceptance\"><span class=\"wpcf7-list-item\"><label><input type=\"checkbox\" name=\"acceptance-277\" value=\"1\" aria-invalid=\"false\" \/><span class=\"wpcf7-list-item-label\">Dichiara di accettare che i Suoi dati vengano utilizzati per l\u2019elaborazione della Sua richiesta e di aver letto la nostra <a href=\"https:\/\/www.uretek.ch\/it\/protezione-dei-dati\/\" target=\"_blank\">dichiarazione sulla protezione dei dati.<\/a> I Suoi dati di contatto non saranno inoltrati a terzi.<\/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":"(solo in francese) Cet article int\u00e9ressant est le r\u00e9sultat de deux \u00e9tudes men\u00e9es en \u00adAustralie et en Italie. Les analyses montrent que \u00adl&#8217;injection de r\u00e9sines expansives URETEK ne permet pas seulement de \u00adconsolider le terrain, mais qu&#8217;elle am\u00e9liore \u00ad\u00e9galement le comportement hydraulique des sols, sensibles \u00e0 la \u00ads\u00e9cheresse et \u00e0 la \u00adr\u00e9hydratation. Effet des injections...","protected":false},"author":1,"featured_media":16961,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[222],"tags":[],"class_list":["post-16935","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articoli-technici-it"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Verringerte Permeabilit\u00e4t \u00bb URETEK Schweiz AG<\/title>\n<meta name=\"description\" content=\"Wirkung der Injektionen von URETEK Expansionsharz auf quell- und schrumpfungsanf\u00e4llige B\u00f6den\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.uretek.ch\/it\/permeabilita-ridotta\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta 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