{"id":41182,"date":"2014-07-01T17:00:37","date_gmt":"2014-07-01T15:00:37","guid":{"rendered":"https:\/\/aquajet.se\/jobreport\/kravande-kontrakt-under-floden\/"},"modified":"2014-07-01T17:00:37","modified_gmt":"2014-07-01T15:00:37","slug":"kravande-kontrakt-under-floden","status":"publish","type":"jobreport","link":"https:\/\/aquajet.se\/sv\/jobreport\/kravande-kontrakt-under-floden\/","title":{"rendered":"Kr\u00e4vande kontrakt, under floden"},"content":{"rendered":"

Ett projekt f\u00f6r att avl\u00e4gsna betong fr\u00e5n Kingsway-tunneln under floden Mersey, som var starkt begr\u00e4nsat av de m\u00f6jliga arbetstimmarna, har slutf\u00f6rts av Buxton Water Ltd med hj\u00e4lp av en Aqua Cutter HVD-robot fr\u00e5n den svenska specialisten Aquajet Systems.<\/p>\n

\"Jobbreport<\/a>Vattenbilningsspecialisten Buxton Water Ltd har anv\u00e4nt en Aqua Cutter vattenbilningsrobot f\u00f6r att avl\u00e4gsna stora betongbitar fr\u00e5n v\u00e4gd\u00e4cket i Kingsway-tunneln under floden Mersey i Liverpool. Projektet med den 2,4 km l\u00e5nga dubbelv\u00e4gstunneln kunde bara genomf\u00f6ras p\u00e5 helgerna f\u00f6r att minimera trafikst\u00f6rningarna, vilket kr\u00e4vde en mycket snabb arbetsteknik som inte kunde uppn\u00e5s med mer traditionella metoder. <\/p>\n

Anv\u00e4ndningen av en robotsk\u00e4rare minskar ocks\u00e5 behovet av arbetskraft p\u00e5 plats och \u00f6kar s\u00e4kerhetsfaktorn avsev\u00e4rt eftersom maskinen fj\u00e4rrstyrs.<\/p>\n

Arbetet utf\u00f6rdes under 26 helger under en sjum\u00e5nadersperiod och betongborttagningen uppgick till i genomsnitt 0,74 m3\/timme under 520 timmars arbete.<\/p>\n

Buxtons VD Mark Hothersall s\u00e4ger att f\u00f6retaget anv\u00e4nder Aqua Cutter HVD-roboten p\u00e5 stora fl\u00e4ckar som har en yta p\u00e5 0,25 m2 eller mer.<\/p>\n

Buxton Water har Storbritanniens st\u00f6rsta flotta av robotar f\u00f6r vattenbilning fr\u00e5n Aquajet Systems i Sverige, och f\u00f6retaget s\u00e4ger att detta system f\u00f6r betongborttagning ger m\u00f6jlighet till mer \u00e4n fem g\u00e5nger h\u00f6gre produktivitet \u00e4n konventionella metoder.<\/p>\n

Eftersom Aqua Cutter \u00e4r fj\u00e4rrstyrd och kan arbeta i omr\u00e5den med begr\u00e4nsat tilltr\u00e4de beh\u00f6ver ingen personal befinna sig i rivningsomr\u00e5det under arbetets g\u00e5ng, vilket \u00e4r en betydande f\u00f6rdel f\u00f6r s\u00e4kerheten.<\/p>\n

Med hj\u00e4lp av en h\u00f6gtrycksvattenstr\u00e5le sk\u00e4r den dieseldrivna roboten Aqua Cutter genom betongen utan att skada konstruktionen eller armeringsj\u00e4rnen.<\/p>\n

Varje helg st\u00e4ngdes Kingsway-tunneln efter rusningstrafiken p\u00e5 fredagskv\u00e4llen, och utmaningen var att avl\u00e4gsna s\u00e5 mycket betong som m\u00f6jligt inom en 20-timmarsperiod, s\u00e5 att huvudentrepren\u00f6ren Volker Laser skulle hinna slutf\u00f6ra reparationerna med tillr\u00e4cklig h\u00e4rdningstid f\u00f6r att kunna \u00f6ppna igen tidigt p\u00e5 m\u00e5ndagen.<\/p>\n

Hothersall s\u00e4ger att arbetsprogrammet m\u00f6jliggjorde en gradvis uppbyggnad under vecka ett och tv\u00e5 f\u00f6r att s\u00e4kerst\u00e4lla att systemen och processerna fungerade, och d\u00e4refter var m\u00e5let att avl\u00e4gsna minst 13 m3 varje helg.<\/p>\n

“Reparationslapparnas storlek varierade fr\u00e5n mindre \u00e4n 0,1 m2 upp till 80 m2, med ett genomsnittligt sk\u00e4rdjup p\u00e5 110 mm f\u00f6r att exponera det inb\u00e4ddade st\u00e5let”, s\u00e4ger han.<\/p>\n

Den faktiska produktiviteten per helg varierade beroende p\u00e5 antal och storlek p\u00e5 de lappar som skulle tas bort.<\/p>\n

“Vi var alltid s\u00e4kra p\u00e5 att kunna \u00f6vertr\u00e4ffa minimikraven, och det som verkligen intresserade oss var att f\u00e5 veta vad som kunde \u00e5stadkommas under en s\u00e5 kort arbetstid”, s\u00e4ger Hothersall. “Vi uppn\u00e5dde faktiskt en genomsnittlig borttagningshastighet p\u00e5 14,8 m3 per 20-timmars helgskift, med en toppnotering p\u00e5 17,9 m3. <\/p>\n

“De genomg\u00e5ende h\u00f6ga produktivitetsniv\u00e5erna visar hur effektivt Aqua Cutter-systemet f\u00f6r vattenbilning \u00e4r, s\u00e4rskilt i koppling till effektiv logistikhantering och en enast\u00e5ende insats fr\u00e5n v\u00e5ra jetting-team.”<\/p>\n","protected":false},"featured_media":17938,"template":"","case_category":[],"class_list":["post-41182","jobreport","type-jobreport","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"\nKr\u00e4vande kontrakt, under floden - 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\/kravande-kontrakt-under-floden\/\" \/>\n<meta property=\"og:locale\" content=\"sv_SE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kr\u00e4vande kontrakt, under floden\" \/>\n<meta property=\"og:description\" content=\"Ett projekt f\u00f6r att avl\u00e4gsna betong fr\u00e5n Kingsway-tunneln under floden Mersey, som var starkt begr\u00e4nsat av de m\u00f6jliga arbetstimmarna, har slutf\u00f6rts av Buxton Water Ltd med hj\u00e4lp av en Aqua Cutter HVD-robot fr\u00e5n den svenska specialisten Aquajet Systems. 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