{"id":2209,"date":"2018-01-10T19:12:01","date_gmt":"2018-01-10T18:12:01","guid":{"rendered":"http:\/\/voyager3.com\/?page_id=2209"},"modified":"2019-03-18T12:16:15","modified_gmt":"2019-03-18T11:16:15","slug":"le-pilier","status":"publish","type":"page","link":"https:\/\/voyager3.com\/?page_id=2209","title":{"rendered":"Le pilier"},"content":{"rendered":"<p>Pour l&rsquo;observation astronomique dans un observatoire le pilier qui supporte l&rsquo;instrument doit \u00eatre \u00ab\u00a0<span style=\"text-decoration: underline;\">ind\u00e9pendant<\/span>\u00a0\u00bb des autres fondations du b\u00e2timent&#8230; Cette condition est <span style=\"text-decoration: underline;\">primordiale<\/span> pour \u00ab\u00a0\u00e9viter\u00a0\u00bb la transmission par le sol et par les planchers de toutes vibrations quelles qu&rsquo;en soient les origines&#8230; Cette contrainte d&rsquo;ingin\u00e9rie a \u00e9t\u00e9 r\u00e9solue par la r\u00e9alisation en sous-sol d&rsquo;une masse en b\u00e9ton de 1,70 m3 soit environ 12 tonnes&#8230; Le f\u00fbt du pilier lui-m\u00eame est constitu\u00e9 par un empilement sur 3 m environ de buses en b\u00e9ton arm\u00e9 de 1,10 m de diam\u00e8tre remplies d&rsquo;un b\u00e9ton l\u00e9ger non vibr\u00e9 avec une armature l\u00e9g\u00e8re de 8 fers de 10 mm pour relier la masse inf\u00e9rieure \u00e0 la t\u00eate du pilier&#8230; soit environ\u00a0 8 tonnes&#8230; Trois tiges filet\u00e9es de 30 mm de diam\u00e8tre ont \u00e9t\u00e9 dispos\u00e9es et orient\u00e9es correctement avant le coulage et le vibrage des 25 derniers cm de b\u00e9ton courant qui forment ainsi la t\u00eate du pilier qui supportera la monture du futur instrument&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pour l&rsquo;observation astronomique dans un observatoire le pilier qui supporte l&rsquo;instrument doit \u00eatre \u00ab\u00a0ind\u00e9pendant\u00a0\u00bb des autres fondations du b\u00e2timent&#8230; Cette condition est primordiale pour \u00ab\u00a0\u00e9viter\u00a0\u00bb la transmission par le sol et par les planchers de toutes vibrations quelles qu&rsquo;en soient les origines&#8230; Cette contrainte d&rsquo;ingin\u00e9rie a \u00e9t\u00e9 r\u00e9solue par la r\u00e9alisation en sous-sol d&rsquo;une masse [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"parent":62,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"jetpack_post_was_ever_published":false,"footnotes":""},"class_list":["post-2209","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/P6Vaq2-zD","jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/voyager3.com\/index.php?rest_route=\/wp\/v2\/pages\/2209","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/voyager3.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/voyager3.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/voyager3.com\/index.php?rest_route=\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/voyager3.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2209"}],"version-history":[{"count":3,"href":"https:\/\/voyager3.com\/index.php?rest_route=\/wp\/v2\/pages\/2209\/revisions"}],"predecessor-version":[{"id":2215,"href":"https:\/\/voyager3.com\/index.php?rest_route=\/wp\/v2\/pages\/2209\/revisions\/2215"}],"up":[{"embeddable":true,"href":"https:\/\/voyager3.com\/index.php?rest_route=\/wp\/v2\/pages\/62"}],"wp:attachment":[{"href":"https:\/\/voyager3.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2209"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}