{"id":1628,"date":"2018-09-20T12:36:23","date_gmt":"2018-09-20T10:36:23","guid":{"rendered":"https:\/\/www.geodeepdrill.com\/it\/?p=1628"},"modified":"2020-01-03T17:30:54","modified_gmt":"2020-01-03T16:30:54","slug":"aste-rotte","status":"publish","type":"post","link":"https:\/\/www.geodeepdrill.com\/it\/aste-rotte\/","title":{"rendered":"Perch\u00e8 rompo le aste?"},"content":{"rendered":"
Sin dal lontano 1982 si \u00e8 dibattuto sulla rigidezza, elasticit\u00e0, realizzazione, durezza ecc. ecc. delle aste dei Penetrometri.<\/p>\n
E\u2019 indubbio che chi fa prove prima o poi qualche asta o punta deve romperla.<\/p>\n
Chiedo cortesemente ai colleghi di non lamentarsi con noi per le rotture.<\/p>\n
Negli anni abbiamo realizzato:<\/p>\n
\n
le aste rigide in acciao C40-39NiCrMo3 ma \u201csi rompevano” e non va bene,<\/li>\n
le abbiamo fatte elastiche e \u201cvibrano” e non va bene,<\/li>\n
le abbiamo fatte malleabili e \u201csi piegano” e non va bene,<\/li>\n
le abbiamo fatte Maschio-Femmina e \u201csi rompe il filetto” e non va bene,<\/li>\n
le abbiamo fatte Femmina-Femmina e \u201csi svitano i grani” e non va bene.<\/li>\n<\/ul>\n
\u00a0<\/p>\n\n\n
\n
La pi\u00f9 comune causa di rottura delle aste \u00e8 la non corretta giuntura tra asta ed asta. <\/p>\n\n\n\n
Il non perfetto serraggio (A) delle aste comporta la rottura del nucleo filettato della vite (D). Serraggio corretto (B) e corretta distribuzione dello sforzo alla giuntura (C). I filetti non perfettamente pulti danno la sensazione che le aste siano serrate perfettamente, ma all’atto della battitura la trasmissione delle onda d’urto si propaga attraverso i filetti e non mediante la “superficie di battuta” (C).<\/p>\n\n\n\n
Altra possibile causa di rottura delle aste \u00e8 la presenza di un piano inclinato sul quale le aste possono scivolare e rompersi.<\/p>\n\n\n\n
Un segnale di questa condizione stratigrafica \u00e8 la presenza del “rifiuto” a quote diverse durante l’esecuzione di pi\u00f9 prove.<\/p>\n\n\n\n<\/figure>\n\n\n\n
Sin dal lontano 1982 si \u00e8 dibattuto sulla rigidezza, elasticit\u00e0, realizzazione, durezza ecc. ecc. delle aste dei Penetrometri. E\u2019 indubbio che chi fa prove prima o poi qualche asta o punta deve romperla. Chiedo cortesemente ai colleghi di non lamentarsi con noi per le rotture. Negli anni abbiamo realizzato: le aste rigide in acciao C40-39NiCrMo3 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[29],"class_list":["post-1628","post","type-post","status-publish","format-standard","hentry","category-domande-frequenti","tag-aste-rotte"],"acf":[],"yoast_head":"\n
Perch\u00e8 rompo le aste? - Geo Deep Drill<\/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:\/\/www.geodeepdrill.com\/it\/aste-rotte\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Perch\u00e8 rompo le aste? - Geo Deep Drill\" \/>\n<meta property=\"og:description\" content=\"Sin dal lontano 1982 si \u00e8 dibattuto sulla rigidezza, elasticit\u00e0, realizzazione, durezza ecc. ecc. delle aste dei Penetrometri. E\u2019 indubbio che chi fa prove prima o poi qualche asta o punta deve romperla. Chiedo cortesemente ai colleghi di non lamentarsi con noi per le rotture. 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