{"id":41171,"date":"2014-07-01T16:30:39","date_gmt":"2014-07-01T14:30:39","guid":{"rendered":"https:\/\/aquajet.se\/jobreport\/tagtunnel-i-de-schweiziska-alperna\/"},"modified":"2014-07-01T16:30:39","modified_gmt":"2014-07-01T14:30:39","slug":"tagtunnel-i-de-schweiziska-alperna","status":"publish","type":"jobreport","link":"https:\/\/aquajet.se\/sv\/jobreport\/tagtunnel-i-de-schweiziska-alperna\/","title":{"rendered":"T\u00e5gtunnel i de schweiziska alperna"},"content":{"rendered":"

Vattenbilning anv\u00e4ndes framg\u00e5ngsrikt p\u00e5 den v\u00e4rldsber\u00f6mda schweiziska j\u00e4rnv\u00e4gen n\u00e4ra Gotthard med hj\u00e4lp av ett 11,5 m h\u00f6gt torn och en ny Aqua Cutter Evolution-robot fr\u00e5n svenska Aqua Rail System f\u00f6r att avl\u00e4gsna skadad betong utan att p\u00e5verka trafiken p\u00e5 det dubbla r\u00e4lsbandet.<\/p>\n

\"Arbetsrapport<\/a>Gotthardtunneln \u00f6ppnades 1882 och \u00e4r fortfarande ett av v\u00e4rldens mest spektakul\u00e4ra larvband som slingrar sig genom de schweiziska alperna, men kr\u00e4ver st\u00e4ndigt rutinunderh\u00e5ll av broar och tunnlar.<\/p>\n

Norr om Sankt Gotthard, ovanf\u00f6r floden Reuss, g\u00e5r f\u00f6rutom r\u00e4lsen \u00e4ven motorv\u00e4gen A2 i en lutning p\u00e5 5\u00ba. R\u00e4lsen slingrar sig dock genom en serie spiralformade tunnlar fram till ing\u00e5ngen till Gotthardtunneln. <\/p>\n

P\u00e5 v\u00e4gen korsar en “tunnelbro” i betong som byggdes f\u00f6r 18 \u00e5r sedan den 50 m djupa dalen. Bron var tidigare en st\u00e5lbro som byggdes 1882 som en \u00f6ppen bro, men den utsattes f\u00f6r en lavin. <\/p>\n

Under vintern 1998 fyllde lavinerna dalen med sn\u00f6 n\u00e4stan \u00e4nda fram till “bro-tunneln”.<\/p>\n

Nya tester har visat att den 88,50 m l\u00e5nga bron kunde ha svepts bort av n\u00e4sta lavinvind.<\/p>\n

Enligt den verkst\u00e4llande ingenj\u00f6ren B\u00fchlmann best\u00e4llde den schweiziska federala j\u00e4rnv\u00e4gen SBB en studie f\u00f6r att g\u00f6ra bron s\u00e4ker.<\/p>\n

Man har valt att armera bron och tunneln, \u00e5terst\u00e4lla brons lager, renovera sprickor som \u00e4r upp till 2 m djupa och ansluta tunnelbron med speciella v\u00e4ggankare till klipporna. Tillsammans med armeringar f\u00f6r lavinbelastningar kommer bron att underh\u00e5llas och skadad betong att bytas ut. <\/p>\n

Schweiziska Br\u00fcgger, som \u00e4r specialiserat p\u00e5 vattenbilning, uts\u00e5gs att utf\u00f6ra betongborttagningen – totalt 230 m\u00b3 – med hj\u00e4lp av sin senaste, specialbest\u00e4llda robot Aqua Cutter Evolution fr\u00e5n svenska Aquajet Systems.<\/p>\n

Aqua Cutter anv\u00e4ndes f\u00f6r “lejonparten” av reparationsarbetet; med en handh\u00e5llen pistol avl\u00e4gsnades n\u00e5gra \u00e5terst\u00e5ende sm\u00e5 omr\u00e5den.<\/p>\n

Den eldrivna roboten anv\u00e4nde 122 l\/min vatten vid ett tryck p\u00e5 1900 armering f\u00f6r att p\u00e5 ett s\u00e4kert s\u00e4tt avl\u00e4gsna den skadade betongen utan att skada de exponerade armeringsj\u00e4rnen.<\/p>\n

En viktig nyhet p\u00e5 den nya Aqua Cutter \u00e4r att alla sensorer och elkablar har tagits bort fr\u00e5n maskinens framsida, vilket eliminerar problem med intr\u00e4ngande vatten, fett och damm.<\/p>\n

Aquajet EDS-systemet m\u00f6jligg\u00f6r en oslagbar lansvinkel utan att sl\u00f6sa energi fr\u00e5n vattenstr\u00e5len. S\u00e5 mycket som \u00b1 45\u00b0 p\u00e5 Evolution-modellen kan v\u00e4ljas, vilket s\u00e4kerst\u00e4ller fullst\u00e4ndig betongborttagning mellan och under armeringen. <\/p>\n

Aqua Cutter best\u00e4lldes genom den lokala distribut\u00f6ren At\u00fcmat AG och valdes f\u00f6r sin m\u00e5ngsidighet, anv\u00e4ndarv\u00e4nlighet, transportv\u00e4nlighet och kompakta och l\u00e4tta konstruktion.<\/p>\n

Enheten, som arbetar p\u00e5 1 300 meters h\u00f6jd, lyftes p\u00e5 plats med kran och installerades p\u00e5 den motsatta sidan av dalen.<\/p>\n

F\u00f6r att kunna kapa 20 mm betong p\u00e5 utsidan av tunnelbron valde Br\u00fcgger att toppa Aquacutters 6 m standardtorn med ytterligare ett 5,5 m tornelement f\u00f6r att n\u00e5 en maximal h\u00f6jd p\u00e5 11,5 m.<\/p>\n

Robottornet st\u00e4lldes in f\u00f6r att matcha tunnelv\u00e4ggens 10\u00b0 lutning med hj\u00e4lp av ett specialst\u00f6d. Robotens vattenbilningshuvud arbetade konstant och exakt p\u00e5 det 11,5 m h\u00f6ga tornet. \u00c4ven i sitt h\u00f6gsta l\u00e4ge rapporterades \u00e5kvagnsbalken ha varit mycket stabil <\/p>\n

Enligt Daniel Rimle p\u00e5 Br\u00fcgger vann f\u00f6retaget kontraktet genom att f\u00f6resl\u00e5 den b\u00e4sta tekniska l\u00f6sningen. “Jag \u00e4r \u00f6vertygad om att Aqua Cutter-roboten kommer att visa sig vara den b\u00e4sta investeringen. <\/p>\n","protected":false},"featured_media":17910,"template":"","case_category":[],"class_list":["post-41171","jobreport","type-jobreport","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"\nT\u00e5gtunnel i de schweiziska alperna - Aquajet<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/aquajet.se\/sv\/jobreport\/tagtunnel-i-de-schweiziska-alperna\/\" \/>\n<meta property=\"og:locale\" content=\"sv_SE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"T\u00e5gtunnel i de schweiziska alperna\" \/>\n<meta property=\"og:description\" content=\"Vattenbilning anv\u00e4ndes framg\u00e5ngsrikt p\u00e5 den v\u00e4rldsber\u00f6mda schweiziska j\u00e4rnv\u00e4gen n\u00e4ra Gotthard med hj\u00e4lp av ett 11,5 m h\u00f6gt torn och en ny Aqua Cutter Evolution-robot fr\u00e5n svenska Aqua Rail System f\u00f6r att avl\u00e4gsna skadad betong utan att p\u00e5verka trafiken p\u00e5 det dubbla r\u00e4lsbandet. 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