{"id":678,"date":"2013-09-26T13:46:51","date_gmt":"2013-09-26T11:46:51","guid":{"rendered":"http:\/\/wp.unil.ch\/risk\/?p=678"},"modified":"2013-09-26T17:13:25","modified_gmt":"2013-09-26T15:13:25","slug":"guillaume-favre-bulle-instabilites-rocheuses-le-long-de-la-route-nationale-7-secteur-guido-uspallata-km-1118-a-1133-provincia-de-mendoza-argentina","status":"publish","type":"post","link":"https:\/\/wp.unil.ch\/risk\/guillaume-favre-bulle-instabilites-rocheuses-le-long-de-la-route-nationale-7-secteur-guido-uspallata-km-1118-a-1133-provincia-de-mendoza-argentina\/","title":{"rendered":"Guillaume Favre-Bulle: Instabilit\u00e9s rocheuses le long de la route nationale 7 Secteur Guido \u2013 Uspallata (km 1118 \u00e0 1133) Provincia de Mendoza \u2013 Argentina."},"content":{"rendered":"<p><em>Guillaume Favre-Bulle<\/em><br \/>\n<em>Co-supervisors: Prof. Michel Jaboyedoff,\u00a0Val\u00e9rie Baumann,\u00a0Andrea Pedrazzini<\/em><\/p>\n<p style=\"text-align: justify\">The National Road 7, important link between Argentina and Chile, is subject to many natural\u00a0hazards, threatening the vehicles travelling along. This work aims to classify the risk associated\u00a0with falling blocks, to intervene as a priority on the most dangerous places to avoid investing in\u00a0useless protective measures.<\/p>\n<p style=\"text-align: justify\">The study area is located west of the city of Mendoza in the Andes. The road passes several times\u00a0along rocky outcrops that may be highly fractured and let blocks free.\u00a0The analysis was conducted on two points: a GIS analysis of the DEM (Digital Elevation Model)\u00a0and a field study.\u00a0The GIS analysis has called for the creation and the search for a DEM of good quality. After\u00a0several trials with satellite images and the SRTM, pairs of stereoscopic aerial photographs of 1966\u00a0have given the least bad outcome. These DEM are strongly deformed in places and do not\u00a0reproduce accurately the topography.<\/p>\n<p style=\"text-align: justify\">The GIS analysis is based entirely on the study of the geometry of the DEM, the result is related to\u00a0quality. Several factors are summed together : rock instabilities for the break susceptibility, slope,\u00a0slope orientation, kinematic tests of the main discontinuities and SLBL. The results are used for\u00a0propagations simulations of falling blocks. The results are not very good because of the poor\u00a0quality of the DEM. Areas with high failure susceptibility are numerous and extensive, making it\u00a0impossible to establish priority areas. The Conefall propagation can not be calibrated with field\u00a0data and the results are indicative only.<\/p>\n<p style=\"text-align: justify\">On the field, discontinuities outcrops were measured and used to calculate several classification\u00a0methods: RMR, SMR, and GSI. The results give rock masses of good quality, but can be very\u00a0unstable following the geometry of the discontinuity and the slope of the outcrop. Then, two RHRS\u00a0methods were calculated on each outcrop to classify them in order of priority for intervention. Both\u00a0methods (RHRS Budetta and RHRS Colorado) take into account the characteristics of the slope,\u00a0climate, geology and exposure of vehicles to danger. Both methods were compared and it is the\u00a0Colorado RHRS which was recommended for future studies.<\/p>\n<p style=\"text-align: justify\">The RHRS allowed to classify outcrops for priority of intervention. Sites with the highest scores will\u00a0be subject to further study to determine what protective measures will be most suitable and the\u00a0money will be managed in the best possible way.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Guillaume Favre-Bulle Co-supervisors: Prof. Michel Jaboyedoff,\u00a0Val\u00e9rie Baumann,\u00a0Andrea Pedrazzini The National Road 7, important link between Argentina and Chile, is subject to many natural\u00a0hazards, threatening the vehicles travelling along. This work &hellip; <\/p>\n","protected":false},"author":1341,"featured_media":885,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","ngg_post_thumbnail":0,"footnotes":""},"categories":[73758],"tags":[51880],"class_list":{"0":"post-678","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-masters_completed","8":"tag-51880"},"_links":{"self":[{"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/posts\/678","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/users\/1341"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/comments?post=678"}],"version-history":[{"count":0,"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/posts\/678\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/media\/885"}],"wp:attachment":[{"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/media?parent=678"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/categories?post=678"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.unil.ch\/risk\/wp-json\/wp\/v2\/tags?post=678"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}