{"id":28777,"date":"2022-08-17T10:41:04","date_gmt":"2022-08-17T10:41:04","guid":{"rendered":"https:\/\/montenegroexpersa.com\/pt\/?p=28777"},"modified":"2023-01-06T12:28:14","modified_gmt":"2023-01-06T12:28:14","slug":"pilha-in-situ","status":"publish","type":"post","link":"https:\/\/montenegroexpersa.com\/pt\/pilha-in-situ\/","title":{"rendered":"Pilha in-situ"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">A pilha in-situ \u00e9 um elemento amplamente utilizado em funda\u00e7\u00f5es profundas. Uma das suas principais caracter\u00edsticas \u00e9 que transfere o peso da estrutura para \u00e1reas do terreno que oferecem maior resist\u00eancia. Devido \u00e0s suas caracter\u00edsticas de constru\u00e7\u00e3o, s\u00e3o f\u00e1ceis de executar e econ\u00f3micas em compara\u00e7\u00e3o com <a href=\"https:\/\/montenegroexpersa.com\/pt\/microestacas\/\">outras t\u00e9cnicas<\/a>.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><b>O que \u00e9 a condu\u00e7\u00e3o de pilhas in-situ.<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Uma diferen\u00e7a b\u00e1sica entre a condu\u00e7\u00e3o in-situ e convencional de estacas \u00e9 a primeira ser executada na mesma \u00e1rea onde ser\u00e1 colocada. Isto significa n\u00e3o haver necessidade de transporte e que n\u00e3o s\u00e3o necess\u00e1rias gruas para a instala\u00e7\u00e3o. Mas o que \u00e9 uma pilha?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Basicamente, \u00e9 um elemento de funda\u00e7\u00e3o profunda, geralmente feito de bet\u00e3o, embora tamb\u00e9m possa ser utilizada argamassa. Portanto, a primeira coisa a determinar \u00e9 a categoria de argamassa a ser utilizada.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Por outro lado, \u00e9 poss\u00edvel construir estacas no seu lugar original com refor\u00e7o met\u00e1lico, geralmente de a\u00e7o madrugador. Tamb\u00e9m \u00e9 poss\u00edvel utilizar inv\u00f3lucros met\u00e1licos, que nada mais s\u00e3o do que um tubo utilizado para refor\u00e7ar o furo de sondagem. Cada categoria de pilha in-situ \u00e9 descrita em detalhe abaixo.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><b>Pilhas de deslocamento.<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Esta categoria de elemento de funda\u00e7\u00e3o profunda \u00e9 feito injetando calda de inje\u00e7\u00e3o sob alta press\u00e3o. Ap\u00f3s a conclus\u00e3o do processo de perfura\u00e7\u00e3o, e imediatamente antes da remo\u00e7\u00e3o da guia de perfura\u00e7\u00e3o, o bet\u00e3o \u00e9 introduzido atrav\u00e9s de um tubo especial. Isto \u00e9 normalmente projetado em dire\u00e7\u00e3o \u00e0s paredes laterais, compactando o solo circundante.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Esta t\u00e9cnica \u00e9 \u00fatil em solos com qualidades de baixa resist\u00eancia. Ao deslocar o solo, \u00e9 poss\u00edvel aumentar a capacidade de suporte e, em simult\u00e2neo, reduzir a probabilidade de deslizamento. Tamb\u00e9m permite a perfura\u00e7\u00e3o de pilhas com um di\u00e2metro maior do que o furo original.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><b>Pilhas com inv\u00f3lucro recuper\u00e1vel e com inv\u00f3lucro perdido.<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Como o nome sugere, estas duas categorias de pilhas distinguem-se um do outro pela finalidade do inv\u00f3lucro. No caso de estacas de caixa recuper\u00e1veis, \u00e9 inserido um tubo em simult\u00e2neo com a perfura\u00e7\u00e3o do orif\u00edcio de perfura\u00e7\u00e3o. Isto permite que as paredes fiquem est\u00e1veis at\u00e9 que a argamassa seja aplicada. Posteriormente, o revestimento \u00e9 levantado alguns cent\u00edmetros e a argamassa \u00e9 introduzida sem atingir a extremidade do tubo. \u00c0 medida que o inv\u00f3lucro \u00e9 puxado para fora, o sistema de betuma\u00e7\u00e3o \u00e9 tamb\u00e9m levantado at\u00e9 \u00e0 superf\u00edcie.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Por outro lado, a manga perdida in-situ tem um processo de constru\u00e7\u00e3o semelhante, com a diferen\u00e7a de que o tubo n\u00e3o \u00e9 puxado para fora do furo. Esta categoria de elemento \u00e9 utilizado quando o solo \u00e9 altamente inst\u00e1vel ou quando existem len\u00e7\u00f3is fre\u00e1ticos na \u00e1rea. Obviamente, a pilha de inv\u00f3lucros perdidos \u00e9 consideravelmente mais cara do que a pilha de inv\u00f3lucros recuper\u00e1veis.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Se nenhum inv\u00f3lucro for utilizado para a constru\u00e7\u00e3o de estacas in-situ, um refor\u00e7o de a\u00e7o madrugador \u00e9 normalmente inserido. \u00c9 inserido ap\u00f3s o furto ter sido preenchido com bet\u00e3o ou argamassa. \u00c9 obviamente mais f\u00e1cil de instalar quando se utilizou argamassa de reboco, visto que n\u00e3o existem elementos adicionais que impe\u00e7am a sua passagem.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pilha in-situ<\/p>\n","protected":false},"author":1,"featured_media":28168,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[16],"tags":[],"class_list":["post-28777","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-microestacas"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.9 - 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