{"id":1946,"date":"2025-10-03T10:11:27","date_gmt":"2025-10-03T13:11:27","guid":{"rendered":"https:\/\/gnrambiental.com.br\/noticias\/?p=1946"},"modified":"2025-10-03T10:11:27","modified_gmt":"2025-10-03T13:11:27","slug":"medicao-de-resistividade-do-solo-metodo-de-wenner-gnr-ambiental","status":"publish","type":"post","link":"https:\/\/gnrambiental.com.br\/noticias\/medicao-de-resistividade-do-solo-metodo-de-wenner-gnr-ambiental\/","title":{"rendered":"Medi\u00e7\u00e3o de Resistividade do Solo (M\u00e9todo de Wenner) \u2013 GNR Ambiental"},"content":{"rendered":"<h1 data-start=\"0\" data-end=\"69\">Medi\u00e7\u00e3o de Resistividade do Solo (M\u00e9todo de Wenner) \u2013 GNR Ambiental<\/h1>\n<p data-start=\"71\" data-end=\"428\"><strong data-start=\"71\" data-end=\"133\">A GNR Ambiental executa a medi\u00e7\u00e3o de resistividade do solo<\/strong> com o m\u00e9todo de <strong data-start=\"150\" data-end=\"176\">Wenner (quatro pontos)<\/strong> para subsidiar o <strong data-start=\"194\" data-end=\"233\">dimensionamento e o projeto do SPDA<\/strong> (Sistema de Prote\u00e7\u00e3o contra Descargas Atmosf\u00e9ricas) e de aterramentos industriais em geral. Entregamos <strong data-start=\"337\" data-end=\"373\">relat\u00f3rio t\u00e9cnico completo + ART<\/strong>, com dados confi\u00e1veis para projetistas e instaladoras.<\/p>\n<hr data-start=\"430\" data-end=\"433\" \/>\n<h2 data-start=\"435\" data-end=\"476\">Por que medir a resistividade do solo?<\/h2>\n<p data-start=\"478\" data-end=\"822\">A efici\u00eancia do aterramento depende diretamente da <strong data-start=\"529\" data-end=\"558\">resistividade (\u03c1) do solo<\/strong>. Sem esse dado, o projeto pode ficar <strong data-start=\"596\" data-end=\"615\">subdimensionado<\/strong> (risco el\u00e9trico) ou <strong data-start=\"636\" data-end=\"657\">superdimensionado<\/strong> (custo desnecess\u00e1rio). A medi\u00e7\u00e3o fornece o par\u00e2metro cr\u00edtico para definir <strong data-start=\"732\" data-end=\"784\">quantidade\/posi\u00e7\u00e3o de hastes, an\u00e9is e condutores<\/strong> e estimar a <strong data-start=\"797\" data-end=\"821\">resist\u00eancia da malha<\/strong>.<\/p>\n<hr data-start=\"824\" data-end=\"827\" \/>\n<h2 data-start=\"829\" data-end=\"852\">Normas e refer\u00eancias<\/h2>\n<ul data-start=\"854\" data-end=\"1109\">\n<li data-start=\"854\" data-end=\"910\">\n<p data-start=\"856\" data-end=\"910\"><strong data-start=\"856\" data-end=\"873\">ABNT NBR 7117<\/strong> \u2013 Medi\u00e7\u00e3o de Resistividade do Solo<\/p>\n<\/li>\n<li data-start=\"911\" data-end=\"973\">\n<p data-start=\"913\" data-end=\"973\"><strong data-start=\"913\" data-end=\"930\">ABNT NBR 5419<\/strong> \u2013 Prote\u00e7\u00e3o contra Descargas Atmosf\u00e9ricas<\/p>\n<\/li>\n<li data-start=\"974\" data-end=\"1035\">\n<p data-start=\"976\" data-end=\"1035\"><strong data-start=\"976\" data-end=\"993\">ABNT NBR 5410<\/strong> \u2013 Instala\u00e7\u00f5es El\u00e9tricas de Baixa Tens\u00e3o<\/p>\n<\/li>\n<li data-start=\"1036\" data-end=\"1109\">\n<p data-start=\"1038\" data-end=\"1109\"><strong data-start=\"1038\" data-end=\"1053\">IEEE Std 81<\/strong> \u2013 Guia de medi\u00e7\u00f5es de resistividade\/imped\u00e2ncia de terra<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"1111\" data-end=\"1114\" \/>\n<h2 data-start=\"1116\" data-end=\"1181\">Como a GNR Ambiental executa o ensaio (Wenner \u2013 quatro pontos)<\/h2>\n<ol data-start=\"1183\" data-end=\"2327\">\n<li data-start=\"1183\" data-end=\"1390\">\n<p data-start=\"1186\" data-end=\"1390\"><strong data-start=\"1186\" data-end=\"1227\">Planejamento e reconhecimento da \u00e1rea<\/strong>: defini\u00e7\u00e3o de linhas de ensaio em duas dire\u00e7\u00f5es (ortogonais) para capturar a heterogeneidade do terreno, afastando-se de malhas\/funda\u00e7\u00f5es que possam interferir.<\/p>\n<\/li>\n<li data-start=\"1391\" data-end=\"1514\">\n<p data-start=\"1394\" data-end=\"1514\"><strong data-start=\"1394\" data-end=\"1412\">Arranjo Wenner<\/strong>: crava\u00e7\u00e3o de <strong data-start=\"1426\" data-end=\"1443\">quatro hastes<\/strong> igualmente espa\u00e7adas (<strong data-start=\"1466\" data-end=\"1487\">C1 \u2013 P1 \u2013 P2 \u2013 C2<\/strong>), com espa\u00e7amento <strong data-start=\"1506\" data-end=\"1511\">a<\/strong>.<\/p>\n<\/li>\n<li data-start=\"1515\" data-end=\"1705\">\n<p data-start=\"1518\" data-end=\"1705\"><strong data-start=\"1518\" data-end=\"1564\">Inje\u00e7\u00e3o de corrente e leitura de potencial<\/strong>: uso de <strong data-start=\"1573\" data-end=\"1607\">terr\u00f4metro de quatro terminais<\/strong> (corrente e tens\u00e3o independentes, com certificado de calibra\u00e7\u00e3o v\u00e1lido) para medir <strong data-start=\"1691\" data-end=\"1702\">R = V\/I<\/strong>.<\/p>\n<\/li>\n<li data-start=\"1706\" data-end=\"1872\">\n<p data-start=\"1709\" data-end=\"1872\"><strong data-start=\"1709\" data-end=\"1739\">Varredura por profundidade<\/strong>: repeti\u00e7\u00e3o das leituras aumentando <strong data-start=\"1775\" data-end=\"1780\">a<\/strong> (1, 2, 3, 5, 10, 15, 20 m\u2026), o que equivale a investigar profundidades da ordem de <strong data-start=\"1864\" data-end=\"1869\">a<\/strong>.<\/p>\n<\/li>\n<li data-start=\"1873\" data-end=\"2024\">\n<p data-start=\"1876\" data-end=\"2024\"><strong data-start=\"1876\" data-end=\"1901\">Controle de qualidade<\/strong>: leituras repetidas, invers\u00e3o autom\u00e1tica de polaridade, rejei\u00e7\u00e3o de ru\u00eddo, registros fotogr\u00e1ficos e georreferenciamento.<\/p>\n<\/li>\n<li data-start=\"2025\" data-end=\"2126\">\n<p data-start=\"2028\" data-end=\"2068\"><strong data-start=\"2028\" data-end=\"2065\">C\u00e1lculo da resistividade aparente<\/strong>:<\/p>\n<p><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\">\u03c1a=2\u03c0aR[\u03a9\u22c5m]\\rho_a = 2 \\pi a R \\quad [\\Omega\\cdot m]<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">\u03c1<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mathnormal mtight\">a<\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord\">2<\/span><span class=\"mord mathnormal\">\u03c0a<\/span><span class=\"mord mathnormal\">R<\/span><span class=\"mopen\">[<\/span><span class=\"mord\">\u03a9<\/span><span class=\"mbin\">\u22c5<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">m<\/span><span class=\"mclose\">]<\/span><\/span><\/span><\/span><\/span><\/li>\n<li data-start=\"2127\" data-end=\"2327\">\n<p data-start=\"2130\" data-end=\"2327\"><strong data-start=\"2130\" data-end=\"2147\">Interpreta\u00e7\u00e3o<\/strong>: constru\u00e7\u00e3o da <strong data-start=\"2163\" data-end=\"2177\">curva \u03c1(a)<\/strong> (log-log), avalia\u00e7\u00e3o de <strong data-start=\"2202\" data-end=\"2213\">camadas<\/strong> e defini\u00e7\u00e3o do <strong data-start=\"2229\" data-end=\"2249\">valor de projeto<\/strong> (ex.: percentil 80\/90 ou condi\u00e7\u00e3o seca, conforme combinado com o projetista).<\/p>\n<\/li>\n<\/ol>\n<hr data-start=\"2329\" data-end=\"2332\" \/>\n<h2 data-start=\"2334\" data-end=\"2354\">O que voc\u00ea recebe<\/h2>\n<ul data-start=\"2356\" data-end=\"2868\">\n<li data-start=\"2356\" data-end=\"2600\">\n<p data-start=\"2358\" data-end=\"2600\"><strong data-start=\"2358\" data-end=\"2388\">Relat\u00f3rio t\u00e9cnico completo<\/strong>, com: metodologia, tabelas de V\/I\/R\/\u03c1, <strong data-start=\"2428\" data-end=\"2446\">gr\u00e1ficos \u03c1 \u00d7 a<\/strong>, plantas e fotos, identifica\u00e7\u00e3o dos equipamentos (n\u00ba de s\u00e9rie e calibra\u00e7\u00e3o), an\u00e1lise por camadas e <strong data-start=\"2546\" data-end=\"2597\">valor de resistividade recomendado para projeto<\/strong>.<\/p>\n<\/li>\n<li data-start=\"2601\" data-end=\"2792\">\n<p data-start=\"2603\" data-end=\"2792\"><strong data-start=\"2603\" data-end=\"2630\">Recomenda\u00e7\u00f5es para SPDA<\/strong>: impacto de \u03c1 no comprimento\/quantidade de hastes, extens\u00f5es de an\u00e9is\/condutores e estimativa da resist\u00eancia da malha (base para softwares\/m\u00e9todos anal\u00edticos).<\/p>\n<\/li>\n<li data-start=\"2793\" data-end=\"2868\">\n<p data-start=\"2795\" data-end=\"2868\"><strong data-start=\"2795\" data-end=\"2841\">ART \u2013 Anota\u00e7\u00e3o de Responsabilidade T\u00e9cnica<\/strong> por engenheiro habilitado.<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2870\" data-end=\"2873\" \/>\n<h2 data-start=\"2875\" data-end=\"2904\">Diferenciais GNR Ambiental<\/h2>\n<ul data-start=\"2906\" data-end=\"3329\">\n<li data-start=\"2906\" data-end=\"2988\">\n<p data-start=\"2908\" data-end=\"2988\"><strong data-start=\"2908\" data-end=\"2934\">Equipe t\u00e9cnica pr\u00f3pria<\/strong> (engenharia el\u00e9trica) e procedimentos padronizados.<\/p>\n<\/li>\n<li data-start=\"2989\" data-end=\"3103\">\n<p data-start=\"2991\" data-end=\"3103\"><strong data-start=\"2991\" data-end=\"3021\">Terr\u00f4metros de 4 terminais<\/strong> e acess\u00f3rios dedicados, com <strong data-start=\"3050\" data-end=\"3071\">calibra\u00e7\u00e3o v\u00e1lida<\/strong> e <strong data-start=\"3074\" data-end=\"3100\">checagem intermedi\u00e1ria<\/strong>.<\/p>\n<\/li>\n<li data-start=\"3104\" data-end=\"3196\">\n<p data-start=\"3106\" data-end=\"3196\">Ensaios planejados para <strong data-start=\"3130\" data-end=\"3154\">resultado utiliz\u00e1vel<\/strong> pelo projetista, reduzindo retrabalhos.<\/p>\n<\/li>\n<li data-start=\"3197\" data-end=\"3329\">\n<p data-start=\"3199\" data-end=\"3329\">Atua\u00e7\u00e3o \u00e1gil em <strong data-start=\"3215\" data-end=\"3301\">S\u00e3o Bernardo do Campo, Santo Andr\u00e9, Diadema, S\u00e3o Paulo, Osasco, Guarulhos, Barueri<\/strong> e demais cidades do estado.<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"3331\" data-end=\"3334\" \/>\n<h2 data-start=\"3336\" data-end=\"3365\">Quem contrata este servi\u00e7o<\/h2>\n<ul data-start=\"3367\" data-end=\"3600\">\n<li data-start=\"3367\" data-end=\"3409\">\n<p data-start=\"3369\" data-end=\"3409\"><strong data-start=\"3369\" data-end=\"3407\">Projetistas e instaladoras de SPDA<\/strong><\/p>\n<\/li>\n<li data-start=\"3410\" data-end=\"3456\">\n<p data-start=\"3412\" data-end=\"3456\"><strong data-start=\"3412\" data-end=\"3454\">Construtoras, condom\u00ednios e facilities<\/strong><\/p>\n<\/li>\n<li data-start=\"3457\" data-end=\"3511\">\n<p data-start=\"3459\" data-end=\"3511\"><strong data-start=\"3459\" data-end=\"3509\">Subesta\u00e7\u00f5es, plantas industriais, data centers<\/strong><\/p>\n<\/li>\n<li data-start=\"3512\" data-end=\"3600\">\n<p data-start=\"3514\" data-end=\"3600\">Empreendimentos que precisam <strong data-start=\"3543\" data-end=\"3569\">comprovar conformidade<\/strong> em auditorias e licenciamentos<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"3602\" data-end=\"3605\" \/>\n<h2 data-start=\"3607\" data-end=\"3634\">Quando repetir a medi\u00e7\u00e3o<\/h2>\n<ul data-start=\"3636\" data-end=\"3841\">\n<li data-start=\"3636\" data-end=\"3716\">\n<p data-start=\"3638\" data-end=\"3716\">Mudan\u00e7a relevante do <strong data-start=\"3659\" data-end=\"3679\">n\u00edvel de umidade<\/strong> (per\u00edodos muito secos ou chuvosos)<\/p>\n<\/li>\n<li data-start=\"3717\" data-end=\"3774\">\n<p data-start=\"3719\" data-end=\"3774\"><strong data-start=\"3719\" data-end=\"3747\">Terraplenagem, funda\u00e7\u00f5es<\/strong> ou novas malhas pr\u00f3ximas<\/p>\n<\/li>\n<li data-start=\"3775\" data-end=\"3841\">\n<p data-start=\"3777\" data-end=\"3841\">Amplia\u00e7\u00e3o do sistema de aterramento ou <strong data-start=\"3816\" data-end=\"3841\">revitaliza\u00e7\u00e3o do SPDA<\/strong><\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"3843\" data-end=\"3846\" \/>\n<h2 data-start=\"3848\" data-end=\"3875\">Fale com a GNR Ambiental<\/h2>\n<p data-start=\"3877\" data-end=\"4004\">Solicite uma visita t\u00e9cnica ou or\u00e7amento:<br data-start=\"3918\" data-end=\"3921\" \/>\ud83d\udcde <strong data-start=\"3924\" data-end=\"3942\">(11) 2374-1201<\/strong> | \ud83d\udcf1 <strong data-start=\"3948\" data-end=\"3967\">(11) 95277-2125<\/strong> | \u2709\ufe0f <strong data-start=\"3973\" data-end=\"4004\"><a class=\"decorated-link cursor-pointer\" rel=\"noopener\" data-start=\"3975\" data-end=\"4002\">contato@gnrambiental.com.br<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Medi\u00e7\u00e3o de Resistividade do Solo (M\u00e9todo de Wenner) \u2013 GNR Ambiental A GNR Ambiental executa a medi\u00e7\u00e3o de resistividade do solo com o m\u00e9todo de Wenner (quatro pontos) para subsidiar o dimensionamento e o projeto do SPDA (Sistema de Prote\u00e7\u00e3o contra Descargas Atmosf\u00e9ricas) e de aterramentos industriais em geral. Entregamos relat\u00f3rio t\u00e9cnico completo + ART, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_joinchat":[],"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1946","post","type-post","status-publish","format-standard","hentry","category-sem-categoria"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Medi\u00e7\u00e3o de Resistividade do Solo (M\u00e9todo de Wenner) \u2013 GNR Ambiental - GNR Ambiental<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gnrambiental.com.br\/noticias\/medicao-de-resistividade-do-solo-metodo-de-wenner-gnr-ambiental\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Medi\u00e7\u00e3o de Resistividade do Solo (M\u00e9todo de Wenner) \u2013 GNR Ambiental - GNR Ambiental\" \/>\n<meta property=\"og:description\" content=\"Medi\u00e7\u00e3o de Resistividade do Solo (M\u00e9todo de Wenner) \u2013 GNR Ambiental A GNR Ambiental executa a medi\u00e7\u00e3o de resistividade do solo com o m\u00e9todo de Wenner (quatro pontos) para subsidiar o dimensionamento e o projeto do SPDA (Sistema de Prote\u00e7\u00e3o contra Descargas Atmosf\u00e9ricas) e de aterramentos industriais em geral. 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