{"id":16727,"date":"2012-08-01T18:25:44","date_gmt":"2012-08-01T16:25:44","guid":{"rendered":"https:\/\/www.uretek.ch\/?p=16727\/"},"modified":"2020-03-04T10:45:16","modified_gmt":"2020-03-04T09:45:16","slug":"test-proprieta-meccaniche-su-campioni-in-grande-scala","status":"publish","type":"post","link":"https:\/\/www.uretek.ch\/it\/test-proprieta-meccaniche-su-campioni-in-grande-scala\/","title":{"rendered":"Test propriet\u00e0 meccaniche della resina URETEK su campioni in grande scala"},"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<p>Le proc\u00e9d\u00e9 URETEK Deep Injections<sup>\u00ae<\/sup> permettant la consolidation et l\u2019augmentation de la portance des sous-sols de fondation gr\u00e2ce \u00e0 l\u2019injection de r\u00e9sine expansive a \u00e9t\u00e9 d\u00e9velopp\u00e9 et brevet\u00e9 par la soci\u00e9t\u00e9 URETEK. Le mat\u00e9riau d\u2019injection URETEK Geoplus<sup>\u00ae<\/sup> est utilis\u00e9 avec succ\u00e8s depuis plusieurs ann\u00e9es dans de nombreux pays europ\u00e9ens. La soci\u00e9t\u00e9 URETEK Injektionstechnik GmbH de Vienne a demand\u00e9 \u00e0 l\u2019institut Austrian Institute of Technology GmbH d\u2019effectuer une comparaison technique entre la documentation existante et les r\u00e9sultats issus d\u2019une \u00e9tude sur le terrain.<br \/>\nDes essais d\u2019injection \u00e0 grande \u00e9chelle ont \u00e9t\u00e9 effectu\u00e9s en 2009 et 2010 avec les r\u00e9sines d\u2019injection de la soci\u00e9t\u00e9 URETEK sur le terrain de l\u2019institut Austrian Institute of Technology GmbH (AIT). L\u2019objectif de ces essais \u00e9tait de d\u00e9montrer l\u2019efficacit\u00e9 des mat\u00e9riaux d\u2019injection de la soci\u00e9t\u00e9 URETEK en utilisant des m\u00e9thodes d\u2019\u00e9valuation g\u00e9otechniques conventionnelles. Les essais choisis pr\u00e9voyaient des sondages par battage avec des sondes l\u00e9g\u00e8res DPL, des mesures de la densit\u00e9 et de la teneur en eau au moyen de sondes isotopiques, la d\u00e9termination du coefficient de d\u00e9for\u00admation dynamique avec une plaque de charge dynamique ainsi que l\u2019ex\u00e9cution d\u2019essais de charge avec une plaque de charge circulaire (DN 600 mm).<\/p>\n<h3>Mise en place et d\u00e9roulements des essais<\/h3>\n<p>Les essais ont eu lieu sur trois types de sols naturels diff\u00e9rents, sans injection (terrain de r\u00e9f\u00e9rence) et avec injection. La comparaison entre les r\u00e9sultats obtenus, avec et sans injection, devait permettre de prouver l\u2019efficacit\u00e9, ou plus exactement l\u2019action positive sur le sous-sol du mat\u00e9riau d\u2019injection.<\/p>\n<p>Tous les essais ont \u00e9t\u00e9 clairement d\u00e9finis et effectu\u00e9s dans des conditions reproductibles (densit\u00e9, teneur en eau, degr\u00e9 de compression) afin de pouvoir garantir une comparaison appropri\u00e9e des r\u00e9sultats. L\u2019un des sols naturels choisis \u00e9tait un sol non coh\u00e9sif et \u00e9bouleux (pierres de Leitha) et les deux autres coh\u00e9sifs (tegel et loess). Les essais d\u2019injection ont eu lieu dans trois conteneurs cylindriques en b\u00e9ton (anneaux de puits) remplis avec les trois substrats naturels cit\u00e9s.<\/p>\n<p>Chaque conteneur a \u00e9t\u00e9 rempli d\u2019un volume de mat\u00e9riaux d\u2019environ 2.40\u00a0m<sup>3<\/sup>\u00a0; tous les substrats naturels ont \u00e9t\u00e9 pr\u00e9par\u00e9s de la m\u00eame mani\u00e8re (densit\u00e9 et teneur en eau), aussi bien pour les essais d\u2019injection que pour les essais en terre de r\u00e9f\u00e9rence.<br \/>\nPour les essais de charge, un aboutement de charge constitu\u00e9 de deux poutres d\u2019acier viss\u00e9es l\u2019une \u00e0 l\u2019autre \u00e0 l\u2019aide de barres d\u2019acier a \u00e9t\u00e9 construit et mont\u00e9 en alternance sur chaque conteneur. La mise sous charge du sol s\u2019est faite avec une plaque de charge de 60 cm de diam\u00e8tre et un v\u00e9rin pneumatique hydraulique adapt\u00e9 ainsi qu\u2019une presse \u00e0 main.\u00a0 L\u2019enregistrement des tassements obtenus suite \u00e0 la mise sous charge a \u00e9t\u00e9 effectu\u00e9 avec des horloges de mesure de d\u00e9placement.<\/p>\n<h4>Avantages de ce proc\u00e9d\u00e9<\/h4>\n<ul>\n<li>Conditions-cadres clairement d\u00e9finies<\/li>\n<li>Sols homog\u00e8nes avec des param\u00e8tres clairement enregistrables (densit\u00e9, teneur en eau)<\/li>\n<li>Expertise possible sur l\u2019ensemble de la zone compress\u00e9e<\/li>\n<li>Essais en parall\u00e8le sur diff\u00e9rents types de sols, mais sur un seul site (trois conteneurs les uns \u00e0 c\u00f4t\u00e9 des autres avec des types de sols diff\u00e9rents)<\/li>\n<\/ul>\n<h3>Objectifs des essais<\/h3>\n<ul>\n<li>D\u00e9termination des param\u00e8tres g\u00e9o\u00adtechniques de base des sols min\u00e9raux soumis aux injections \u00e0 l\u2019aide des m\u00e9thodes d\u2019essais conventionnelles (sondage, d\u00e9termination de la densit\u00e9)<\/li>\n<li>D\u00e9termination du comportement \u00e0 l\u2019affaissement sous diff\u00e9rentes charges appliqu\u00e9es<\/li>\n<li>Comparaison\u00a0 du comportement \u00e0 la d\u00e9formation entre les sols soumis aux injections et les sols non soumis aux injections, tout en ayant des conditions-cadre bien d\u00e9finies et un d\u00e9roulement identique de la mise sous charge<\/li>\n<li>D\u00e9termination et comparaison du co\u00adefficient de d\u00e9formation (Ev) dans les sols avec et sans injections.<\/li>\n<\/ul>\n<h3>R\u00e9sultats<\/h3>\n<p>Les r\u00e9sultats des essais de charge montrent clairement l\u2019action positive de la r\u00e9sine expansive Geoplus<sup>\u00ae<\/sup> inject\u00e9e puis durcie sur le comportement \u00e0 la d\u00e9formation ainsi que sur la portance des diff\u00e9rents types de sols test\u00e9s.<\/p>\n<h4>Sols non coh\u00e9sifs<\/h4>\n<p>Pour les sols non coh\u00e9sifs et \u00e9bouleux (pierres de Leitha) test\u00e9s, les injections ont permis de r\u00e9duire consid\u00e9rablement les tassements lors de la charge simul\u00e9e sur les fondations. La courbe charge \u2013 tassement est clairement plus plate. La ligne de d\u00e9charge est presque horizontale et montre ainsi qu\u2019il s\u2019agit de d\u00e9formations plastiques et qu\u2019une compression et d\u00e9compression \u00e9lastique de la r\u00e9sine expansive n\u2019a pas lieu. La zone d\u2019injection mise \u00e0 nu montre que le mat\u00e9riau d\u2019injection a p\u00e9n\u00e9tr\u00e9 totalement dans les cavit\u00e9s, ce qui a conduit \u00e0 la formation d\u2019une structure de sol de type conglom\u00e9rat. La propagation de la r\u00e9sine s\u2019est faite sur une grande surface et de mani\u00e8re r\u00e9guli\u00e8re.<\/p>\n<h4>Sols coh\u00e9sifs<\/h4>\n<p>Pour les sols coh\u00e9sifs test\u00e9s (tegel et loess), l\u2019injection a permis \u00e9galement de r\u00e9duire consid\u00e9rablement les tasse\u00adments lors de la charge simul\u00e9e sur les fondations. Par ailleurs, la portance a \u00e9t\u00e9 \u00e9galement fortement am\u00e9lior\u00e9e. Ceci est clairement visible lorsque l\u2019on regarde les lignes de tassement de charge du sol de tegel. Le tegel n\u2019ayant pas \u00e9t\u00e9 soumis aux injections montre une portance limite d\u2019environ 200 kN\/m<sup>2<\/sup>, alors que le tegel soumis aux injections avec la r\u00e9sine Geoplus\u00ae affiche une valeur maximale de 400 kN\/m<sup>2<\/sup>. La r\u00e9sine forme, au sein du tegel, un r\u00e9seau de fines lamelles. Ce r\u00e9seau lamellaire permet, d\u2019une part, un compactage local du sol pr\u00e8s des lamelles et, d\u2019autre part, son renforcement par l\u2019effet de cette structure lamellaire.<\/p>\n<h4>Sols en loess<\/h4>\n<p>En raison de leurs couches plus meubles, les sols en loess sont un cas particulier. Dans ce type de sol n\u2019ayant pas subi d\u2019injection, la portance limite est atteinte d\u00e8s les premiers niveaux de charge. Dans ces m\u00eames sols ayant subi des injections, il est possible d\u2019appliquer une charge pouvant atteindre 100 kN\/m<sup>2<\/sup> tout en ayant encore des tassements supportables. Ceci repr\u00e9sente une tr\u00e8s grande am\u00e9lioration de la portance tout en r\u00e9duisant fortement les tassements pouvant survenir.<\/p>\n<\/div><\/div><div class=\"w-separator size_small\"><\/div><div class=\"w-btn-wrapper align_none\"><a class=\"w-btn us-btn-style_4 icon_atleft\" href=\"#\"><i class=\"fas fa-chevron-right\"><\/i><span class=\"w-btn-label\">Rapporto dettagliato<\/span><\/a><\/div><div class=\"w-separator size_medium\"><\/div><div class=\"g-cols wpb_row via_flex valign_top type_boxes stacking_default\" style=\"--additional-gap:25;\"><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\/Diagramme_Auswertung_Belastungsprobe_1.jpg\" aria-label=\"Sols coh\u00e9sifs - Loess : test de charge Courbe charge - tassement pour le loess\" class=\"w-image-h\"><img decoding=\"async\" width=\"788\" height=\"591\" src=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Diagramme_Auswertung_Belastungsprobe_1.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Diagramme_Auswertung_Belastungsprobe_1.jpg 788w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Diagramme_Auswertung_Belastungsprobe_1-450x338.jpg 450w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Diagramme_Auswertung_Belastungsprobe_1-768x576.jpg 768w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/Diagramme_Auswertung_Belastungsprobe_1-600x450.jpg 600w\" sizes=\"auto, (max-width: 788px) 100vw, 788px\" \/><\/a><div class=\"w-image-meta\"><div class=\"w-image-title\">Sols coh\u00e9sifs - Loess : test de charge Courbe charge - tassement pour le loess<\/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\/2012\/07\/Diagramme_Auswertung_Belastungsprobe_2_fr.jpg\" aria-label=\"Analyse du sondage dans le loess avec des p\u00e9n\u00e9trom\u00e8tres l\u00e9gers\" class=\"w-image-h\"><img decoding=\"async\" width=\"788\" height=\"591\" src=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2012\/07\/Diagramme_Auswertung_Belastungsprobe_2_fr.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2012\/07\/Diagramme_Auswertung_Belastungsprobe_2_fr.jpg 788w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2012\/07\/Diagramme_Auswertung_Belastungsprobe_2_fr-450x338.jpg 450w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2012\/07\/Diagramme_Auswertung_Belastungsprobe_2_fr-768x576.jpg 768w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2012\/07\/Diagramme_Auswertung_Belastungsprobe_2_fr-600x450.jpg 600w\" sizes=\"auto, (max-width: 788px) 100vw, 788px\" \/><\/a><div class=\"w-image-meta\"><div class=\"w-image-title\">Analyse du sondage dans le loess avec des p\u00e9n\u00e9trom\u00e8tres l\u00e9gers<\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"g-cols wpb_row via_flex valign_top type_boxes stacking_default\" style=\"--additional-gap:25;\"><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\/ESPANSIONE.jpg\" aria-label=\"Expansion de la r\u00e9sine au niveau des points d\u2019injection\" class=\"w-image-h\"><img decoding=\"async\" width=\"788\" height=\"591\" src=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/ESPANSIONE.jpg\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/ESPANSIONE.jpg 788w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/ESPANSIONE-450x338.jpg 450w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/ESPANSIONE-768x576.jpg 768w, https:\/\/www.uretek.ch\/wp-content\/uploads\/2017\/07\/ESPANSIONE-600x450.jpg 600w\" sizes=\"auto, (max-width: 788px) 100vw, 788px\" \/><\/a><div class=\"w-image-meta\"><div class=\"w-image-title\">Expansion de la r\u00e9sine au niveau des points d\u2019injection<\/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\" 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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) Le proc\u00e9d\u00e9 URETEK Deep Injections\u00ae permettant la consolidation et l\u2019augmentation de la portance des sous-sols de fondation gr\u00e2ce \u00e0 l\u2019injection de r\u00e9sine expansive a \u00e9t\u00e9 d\u00e9velopp\u00e9 et brevet\u00e9 par la soci\u00e9t\u00e9 URETEK. Le mat\u00e9riau d\u2019injection URETEK Geoplus\u00ae est utilis\u00e9 avec succ\u00e8s depuis plusieurs ann\u00e9es dans de nombreux pays europ\u00e9ens. La soci\u00e9t\u00e9 URETEK...","protected":false},"author":1,"featured_media":16752,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[222],"tags":[],"class_list":["post-16727","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>Grossmassst\u00e4bliche Eignungsuntersuchung \u00bb URETEK Schweiz AG<\/title>\n<meta name=\"description\" content=\"Das injizierte Harz expandierte und kompaktierte den Baugrund des Stadtturms, wodurch die Gefahr einer weiteren Setzung verringert wurde.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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