{"id":3450,"date":"2023-02-26T13:20:30","date_gmt":"2023-02-26T12:20:30","guid":{"rendered":"https:\/\/lmvworld.com\/progetto\/rulliere-per-varo-a-spinta-del-ponte\/"},"modified":"2026-03-26T13:38:11","modified_gmt":"2026-03-26T12:38:11","slug":"rulliere-per-varo-a-spinta-del-ponte","status":"publish","type":"progetto","link":"https:\/\/lmvworld.com\/fr\/projet\/rulliere-per-varo-a-spinta-del-ponte\/","title":{"rendered":"Convoyeurs \u00e0 rouleaux pour le lancement des constructions m\u00e9talliques de ponts"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"3450\" class=\"elementor elementor-3450 elementor-3427\" data-elementor-post-type=\"progetto\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dc033b5 e-flex e-con-boxed e-con e-parent\" data-id=\"dc033b5\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0c6332d elementor-widget elementor-widget-text-editor\" data-id=\"0c6332d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Afin de minimiser les charges agissant sur la structure finale du b\u00e9ton et de diminuer les charges maximales pour le lancement, a \u00e9t\u00e9 consid\u00e9r\u00e9e la conception du roulement \u00e0 rouleaux.<\/p><p>En outre, \u00e0 l&rsquo;aide de ce type de roulement, on peut avoir les avantages suivants :<br \/>-Assurer la s\u00e9curit\u00e9 de l&rsquo;op\u00e9ration<br \/>-\u00c9viter de possibles perturbations imputables aux changements des curseurs eux-m\u00eames endommag\u00e9 par la consommation.<\/p><p><strong>ROULEAUX<\/strong><br \/>Exemples des mod\u00e8les:<\/p><p>MR250T 2N 315D 45CM 2X-e<br \/>MR250T 2N 450D 45CM 2X-e<br \/>MR250T 2N 315D 30CM 120L 15S2X-e<br \/>MR250T 2N 450D 30CM 120L 15S2X-e<br \/>MR250T 2N 450D 45CM 120L 15S2X-e<\/p><p>\u00a0<\/p><p>Cela montre la l\u00e9gende pour les rouleaux:<\/p><table><tbody><tr><td><em>1<\/em><\/td><td><strong>T<\/strong><\/td><td><p>T SLS capacit\u00e9 porteuse [t] pour chaque ligne<\/p><\/td><\/tr><tr><td><em>2<\/em><\/td><td><strong>N<\/strong><\/td><td><p>nombre de N de ligne roller roue simple<\/p><\/td><\/tr><tr class=\"warning\"><td><em>\u00a03\u00a0<\/em><\/td><td><strong>D<\/strong><\/td><td><p>Diam\u00e8tre nominal 3D de la roue avec un plan de roulement [mm]<\/p><\/td><\/tr><tr><td><em>4<\/em><\/td><td><strong>CM\u00a0<\/strong><\/td><td><p>course verticale maximale [cm]<\/p><\/td><\/tr><tr><td><em>5<\/em><\/td><td><strong>L<\/strong><\/td><td>Option translation transversale 5L\u00a0[cm]<\/td><\/tr><tr><td><em>6<\/em><\/td><td><strong>S<\/strong><\/td><td><p>rotation S autour de l&rsquo;axe vertical (pivotant) [\u00b0]<\/p>[DEG\u00b0]<\/td><\/tr><tr><td><em>7<\/em><\/td><td><strong>2X<\/strong><\/td><td><p>double (rouleau sur deux lignes parall\u00e8les)<\/p><\/td><\/tr><tr><td><strong><em>\u00a0<\/em><\/strong><\/td><td><strong>-e<\/strong><\/td><td><p>en indiquant la gorge majeure<\/p><\/td><\/tr><\/tbody><\/table><p>\u00a0<\/p><p><strong>ROULEAUX<\/strong><br \/>Exemples de mod\u00e8les:<\/p><p><strong>Mr-250T-2n-315D-30cm-120L-15S2X-e<\/strong><\/p><p>Rouleaux avec:<br \/>\u2022 Capacit\u00e9 de charge avec roulement de SLS [t] pour chaque ligne 250 t<br \/>\u2022 2 ligne de rouleau<br \/>\u2022 D315mm diam\u00e8tre<br \/>\u2022 course verticale maximale de 300 mm<br \/>\u2022 Option de traduction transversale 1200 mm<br \/>\u2022 12\u00b0 rotation autour de l&rsquo;axe vertical<br \/>\u2022 Double (rouleau sur deux lignes parall\u00e8les)<br \/>\u2022 Gorge plus grande<\/p><p><strong>MR3000T24N450D120CM120L9S-e<\/strong><\/p><p>Motivations pour ce projet: le pont double est un viaduc dont le poids au m\u00e8tre lin\u00e9aire<br \/>depasse les 20 tonnes \/ lm.<br \/>Dans cet essai, les charges lors du lancement de l&rsquo;op\u00e9ration sont tr\u00e8s consid\u00e9rables, donc on a besoin de la capacit\u00e9 de 3000 tonnes (SLU).<br \/>Description du rouleau<br \/>Rouleau de 24 roues avec roulements<br \/>Roues d&rsquo;un diam\u00e8tre de 450 mm et 275 mm largeur de gorge.<br \/>Les roues sont en 6 groupes de 4 roues de chaque.<\/p><p>Les rouleaux sont con\u00e7us avec les degr\u00e9s des libert\u00e9s suivantes:<\/p><p>\u2022 Possibilit\u00e9 de r\u00e9gler la position verticale du rouleau corps principal gr\u00e2ce \u00e0 l&rsquo;utilisation des<br \/>v\u00e9rins hydrauliques pour assurer la r\u00e9action de la th\u00e9orie sur le rouleau.<\/p><p>\u2022 Possibilit\u00e9 de faire pivoter autour de l&rsquo;axe vertical de la course au corps principal en utilisant<br \/>v\u00e9rins hydrauliques, de suivre la courbe de l&rsquo;\u00e2me du fonds corde du viaduc.<\/p><p>\u2022 Possibilit\u00e9 de d\u00e9placement transversal \u00e0 la direction de lancement, \u00e0 l&rsquo;aide du cric hydraulique<br \/>afin d&rsquo;ajuster la position du rouleau selon le parcours du lancement.<\/p><p><strong>La capacit\u00e9 totale de 3000 tonnes sont \u00e9quip\u00e9es des \u00e9l\u00e9ments suivants<\/strong><\/p><p>\u2022 Pos_1: Jack avec capacit\u00e9 de 520 tonnes et 61 cm<br \/>\u2022 Pos_2: Jack avec une capacit\u00e9 de 800 tonnes et 60 cm<br \/>\u2022 Pos_3: Jack avec une capacit\u00e9 de 140 tonnes et 33 cm<br \/>\u2022 Pos_4: Jack avec capacit\u00e9 de 440 tonnes et 120 cm<br \/>\u2022 Pos_5: Jack avec 323 tonnes de capacit\u00e9 et plus rapide 75 cm<\/p><p><strong>MR3000T24N450D120CM120L9S-e<\/strong><\/p><p>Raison de la conception: afin de r\u00e9duire autant que possible les charges agissant sur la<br \/>derni\u00e8re structure de b\u00e9ton et de diminuer au maximum les charges pour le lancement, la<br \/>conception de rouleaux avec ce palier \u00e0 roulement a \u00e9t\u00e9 examin\u00e9e.<br \/>En outre les avantages suivants sont accessibles \u00e0 l\u2019aide de cette typologie des roulements :<br \/>Assurer la s\u00e9curit\u00e9 de l\u2019exploitation<br \/>\u00c9viter l\u2019interruption possible de l\u2019activit\u00e9 en raison des changements des curseurs lui-m\u00eame<br \/>endommag\u00e9 par la consommation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2f8e464 elementor-widget elementor-widget-gallery\" data-id=\"2f8e464\" data-element_type=\"widget\" data-e-type=\"widget\" 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