{"id":696,"date":"2021-11-03T04:34:04","date_gmt":"2021-11-03T03:34:04","guid":{"rendered":"https:\/\/projets-istep.eu\/?p=696"},"modified":"2026-02-02T16:33:51","modified_gmt":"2026-02-02T15:33:51","slug":"mesures-geotechniques-penetrometre-penfeld","status":"publish","type":"post","link":"https:\/\/projets-istep.eu\/?p=696","title":{"rendered":"Mesures G\u00e9otechniques – P\u00e9n\u00e9trom\u00e8tre Penfeld"},"content":{"rendered":"\n

C\u2019est un outil capable d\u2019effectuer en mer profonde des mesures g\u00e9otechniques in situ par p\u00e9n\u00e9trom\u00e9trie sur une profondeur d’investigation jusqu\u2019\u00e0 50 m\u00e8tres. L\u2019engin est reli\u00e9 au navire par un c\u00e2ble porteur. Il est d\u00e9pos\u00e9 sur le fond marin et maintenu en station pendant la dur\u00e9e d\u2019un fon\u00e7age. La tige m\u00e9tallique creuse, semi-rigide, est \u00e9quip\u00e9e d\u2019une pointe instrument\u00e9e avec 3 capteurs (r\u00e9sistance, friction et exc\u00e8s de pression), et est enserr\u00e9e entre deux cha\u00eenes et entra\u00een\u00e9e par friction. La tige est d\u00e9roul\u00e9e et enroul\u00e9e \u00e0 chaque plant\u00e9. Au cours d\u2019une plong\u00e9e, huit plant\u00e9s peuvent \u00eatre r\u00e9alis\u00e9s, en des emplacements diff\u00e9rents. Une liaison acoustique informe du d\u00e9roulement des phases op\u00e9ratoires. Les mesures num\u00e9ris\u00e9es sont stock\u00e9es sur l\u2019engin et r\u00e9cup\u00e9r\u00e9es d\u00e8s le retour sur le navire.<\/p>\n\n\n\n

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Mise \u00e0 l’eau puis r\u00e9cup\u00e9ration du p\u00e9n\u00e9trom\u00e8tre<\/em><\/figcaption><\/figure>\n\n\n\n

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Les mesures avec le Penfeld nous permettent de caract\u00e9riser l\u2019\u00e9tat m\u00e9canique des s\u00e9diments marins. Cette information est essentielle pour comprendre la stabilit\u00e9 des pentes sous-marines et le d\u00e9clenchement des glissements sous-marins. De plus, nous recherchons \u00e0 comprendre quel est l\u2019\u00e9tat m\u00e9canique des s\u00e9diments le long des plans de failles actives responsables de la sismicit\u00e9 de la mer d\u2019Alboran.<\/p>\n\n\n\n

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C\u2019est un outil capable d\u2019effectuer en mer profonde des mesures g\u00e9otechniques in situ par p\u00e9n\u00e9trom\u00e9trie sur une profondeur d’investigation jusqu\u2019\u00e0 50 m\u00e8tres. L\u2019engin est reli\u00e9 au navire par un c\u00e2ble porteur. Il est d\u00e9pos\u00e9 sur le fond marin et maintenu en station pendant la dur\u00e9e d\u2019un fon\u00e7age. La tige m\u00e9tallique creuse, semi-rigide, est \u00e9quip\u00e9e d\u2019une […]<\/p>\n","protected":false},"author":2,"featured_media":713,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-696","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-education"],"_links":{"self":[{"href":"https:\/\/projets-istep.eu\/index.php?rest_route=\/wp\/v2\/posts\/696","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/projets-istep.eu\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/projets-istep.eu\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/projets-istep.eu\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/projets-istep.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=696"}],"version-history":[{"count":5,"href":"https:\/\/projets-istep.eu\/index.php?rest_route=\/wp\/v2\/posts\/696\/revisions"}],"predecessor-version":[{"id":1031,"href":"https:\/\/projets-istep.eu\/index.php?rest_route=\/wp\/v2\/posts\/696\/revisions\/1031"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/projets-istep.eu\/index.php?rest_route=\/wp\/v2\/media\/713"}],"wp:attachment":[{"href":"https:\/\/projets-istep.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=696"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/projets-istep.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=696"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/projets-istep.eu\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=696"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}