The Maurice Lemaire tunnel is one of the longest tunnels in France (6\u00a0950 m). It is located between Saint-Marie-aux-Mines(68) and Lusse (88) and has been subject to a vast program of upgrades. A safety gallery was dug in order to renovate the ventilation system.<\/p>\n
A transversal ventilation strategy with air flow control was installed. It led to the installation of a device to handle smoke exhaust processes as well as the installation of fresh air supply and used air renewal combined with jet fans which will control the longitudinal airstream.<\/p>\n
This tunnel\u2019s specificity is that it only has 4 extraction fans, two located at each end of the tunnel. The smoke exhaust ducts are placed in the ceiling of the safety gallery. The main requirement is that the smokes must be drained from the tunnel, into the ducts over the safety gallery then they must be extracted through one of the extraction heads. The smokes can spread up to 3\u00a0000 m in a duct located right above the user\u2019s evacuation gallery.<\/p>\n","protected":false},"excerpt":{"rendered":"
The Maurice Lemaire tunnel is one of the longest tunnels in France (6 950 m). It is located between Saint-Marie-aux-Mines(68) and Lusse (88) and has been subject to a vast program of upgrades. A safety gallery was dug in order to renovate the ventilation system.<\/p>\n","protected":false},"author":1,"featured_media":592,"comment_status":"closed","ping_status":"open","sticky":false,"template":"templates\/template-fiche-reference.php","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[63],"tags":[],"class_list":["post-1399","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tunnel-en"],"acf":[],"_links":{"self":[{"href":"https:\/\/f2a.fr\/en\/wp-json\/wp\/v2\/posts\/1399","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/f2a.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/f2a.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/f2a.fr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/f2a.fr\/en\/wp-json\/wp\/v2\/comments?post=1399"}],"version-history":[{"count":0,"href":"https:\/\/f2a.fr\/en\/wp-json\/wp\/v2\/posts\/1399\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/f2a.fr\/en\/wp-json\/wp\/v2\/media\/592"}],"wp:attachment":[{"href":"https:\/\/f2a.fr\/en\/wp-json\/wp\/v2\/media?parent=1399"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/f2a.fr\/en\/wp-json\/wp\/v2\/categories?post=1399"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/f2a.fr\/en\/wp-json\/wp\/v2\/tags?post=1399"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}