{"id":299,"date":"2013-11-14T11:41:28","date_gmt":"2013-11-14T10:41:28","guid":{"rendered":"https:\/\/www.innogeo.fr\/balthazar\/?p=299"},"modified":"2014-04-16T15:37:37","modified_gmt":"2014-04-16T14:37:37","slug":"lessai-msp-normalise-nf-p94-160-3","status":"publish","type":"post","link":"https:\/\/www.innogeo.fr\/english\/2013\/11\/14\/lessai-msp-normalise-nf-p94-160-3\/","title":{"rendered":"Standardised PS testing (NF P94-160-3)"},"content":{"rendered":"<p style=\"text-align: center\"><a href=\"https:\/\/www.innogeo.fr\/english\/wp-content\/uploads\/sites\/7\/2013\/11\/msp.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter\" alt=\"msp\" src=\"https:\/\/www.innogeo.fr\/english\/wp-content\/uploads\/sites\/7\/2013\/11\/msp.jpg\" width=\"419\" height=\"229\" \/><\/a><\/p>\n<p>The parallel seismic (PS) testing method is a standardised method used to determine the depth of the foundations of a building or structure, but also to control foundations devoid of re-entrant tubes for sonic investigations and when the impedance method cannot be used.<\/p>\n<p>A borehole is drilled in parallel of a foundation generatrix, as close as possible to it and less than 1.5m away, up to 5meters below the appraised foundation end point. A PVC tube is placed in the borehole and sealed with cement grout on all its height.<\/p>\n<p>We then measure the travel time of a seismic wave between the top of the foundations and a line of seismic sensors placed in the borehole (0.5m space between each on all of the borehole\u2019s height). A seismic wave is generated by creating a chock at the top of the foundations or on a structural element directly united to the top of the foundations.<\/p>\n<p>Seismic waves are recorded with a high-precision digital seismic recorder. The data is saved and processed by the engineering department to create a chart of waves\u2019 travel time depending on depth. From this chart, we determine the depth of the foundations with a precision of a few decimetres.<\/p>\n<h5 style=\"text-align: center\"><a href=\"https:\/\/www.innogeo.fr\/wp-content\/uploads\/2013\/11\/msp2.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter\" alt=\"msp2\" src=\"https:\/\/www.innogeo.fr\/wp-content\/uploads\/2013\/11\/msp2.jpg\" width=\"351\" height=\"461\" \/><\/a><strong><span style=\"color: #888888\">Parallel seismic test method<\/span><\/strong><\/h5>\n","protected":false},"excerpt":{"rendered":"<p>The parallel seismic (PS) testing method is a standardised method used to determine the depth of the foundations of a building or structure, but also to control foundations devoid of re-entrant tubes for sonic investigations and when the impedance method cannot be used. A borehole is drilled in parallel of a foundation generatrix, as close [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":300,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[],"_links":{"self":[{"href":"https:\/\/www.innogeo.fr\/english\/wp-json\/wp\/v2\/posts\/299"}],"collection":[{"href":"https:\/\/www.innogeo.fr\/english\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.innogeo.fr\/english\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.innogeo.fr\/english\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.innogeo.fr\/english\/wp-json\/wp\/v2\/comments?post=299"}],"version-history":[{"count":0,"href":"https:\/\/www.innogeo.fr\/english\/wp-json\/wp\/v2\/posts\/299\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.innogeo.fr\/english\/wp-json\/wp\/v2\/media\/300"}],"wp:attachment":[{"href":"https:\/\/www.innogeo.fr\/english\/wp-json\/wp\/v2\/media?parent=299"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.innogeo.fr\/english\/wp-json\/wp\/v2\/categories?post=299"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.innogeo.fr\/english\/wp-json\/wp\/v2\/tags?post=299"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}