{"id":78755,"date":"2018-10-18T14:02:19","date_gmt":"2018-10-18T12:02:19","guid":{"rendered":"https:\/\/blog.bluebeam.com\/se\/?p=78755"},"modified":"2021-11-11T16:23:14","modified_gmt":"2021-11-11T15:23:14","slug":"rebuilding-alcatraz","status":"publish","type":"post","link":"https:\/\/blog.bluebeam.com\/se\/rebuilding-alcatraz\/","title":{"rendered":"\u00c5teruppbygga Alcatraz"},"content":{"rendered":"\n<figure class=\"wp-block-gallery columns-5 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-2-157x210.jpg\"><img decoding=\"async\" width=\"157\" height=\"210\" src=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-2-157x210.jpg\" alt=\"\" data-id=\"78761\" data-full-url=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-2-157x210.jpg\" data-link=\"https:\/\/blog.bluebeam.com\/se\/?attachment_id=78761\" class=\"wp-image-78761\" srcset=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-2-157x210.jpg 157w, https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-2-157x210-150x200.jpg 150w\" sizes=\"(max-width: 157px) 100vw, 157px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-3-294x210.jpg\"><img fetchpriority=\"high\" decoding=\"async\" width=\"294\" height=\"210\" src=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-3-294x210.jpg\" alt=\"\" data-id=\"78760\" data-full-url=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-3-294x210.jpg\" data-link=\"https:\/\/blog.bluebeam.com\/se\/?attachment_id=78760\" class=\"wp-image-78760\" srcset=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-3-294x210.jpg 294w, https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-3-294x210-280x200.jpg 280w\" sizes=\"(max-width: 294px) 100vw, 294px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-4-294x210.jpg\"><img decoding=\"async\" width=\"294\" height=\"210\" src=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-4-294x210.jpg\" alt=\"\" data-id=\"78759\" data-full-url=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-4-294x210.jpg\" data-link=\"https:\/\/blog.bluebeam.com\/se\/?attachment_id=78759\" class=\"wp-image-78759\" srcset=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-4-294x210.jpg 294w, https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-4-294x210-280x200.jpg 280w\" sizes=\"(max-width: 294px) 100vw, 294px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-5-294x210.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"294\" height=\"210\" src=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-5-294x210.jpg\" alt=\"\" data-id=\"78758\" data-full-url=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-5-294x210.jpg\" data-link=\"https:\/\/blog.bluebeam.com\/se\/?attachment_id=78758\" class=\"wp-image-78758\" srcset=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-5-294x210.jpg 294w, https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-5-294x210-280x200.jpg 280w\" sizes=\"(max-width: 294px) 100vw, 294px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-1-294x210.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"294\" height=\"210\" src=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-1-294x210.jpg\" alt=\"\" data-id=\"78757\" data-full-url=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-1-294x210.jpg\" data-link=\"https:\/\/blog.bluebeam.com\/se\/?attachment_id=78757\" class=\"wp-image-78757\" srcset=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-1-294x210.jpg 294w, https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2020\/09\/RebuildingAlcatraz-Inline-1-294x210-280x200.jpg 280w\" sizes=\"(max-width: 294px) 100vw, 294px\" \/><\/a><\/figure><\/li><\/ul><\/figure>\n\n\n\n<p>I korthet:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Strukturerna p\u00e5 Alcatraz Island f\u00f6rf\u00f6ll, armeringsj\u00e4rnet korroderade och betongen sprack.<\/li><li>Ingenj\u00f6rerna anv\u00e4nde industriellt reparbete f\u00f6r att utv\u00e4rdera betongens tillst\u00e5nd och hur l\u00e5ngt g\u00e5nget f\u00f6rfallet var p\u00e5 n\u00e4ra h\u00e5ll.<\/li><li>WJE installerade sensorer, tog fram exakta kartor \u00f6ver sprickorna och j\u00e4mf\u00f6rde observationer fr\u00e5n \u00e5r till \u00e5r.<\/li><li>Genom analyser kunde man besluta om framtida reparationsarbete och f\u00f6rst\u00e4rkning av byggnadens sjukhusflygel.<\/li><\/ul>\n\n\n\n<p>En man h\u00e4nger fr\u00e5n ett rep l\u00e4ngs sidan av Alcatraz cellbyggnad. Han har en hammare i handen. Mannen \u00e4r Aaron Weiss. Men det \u00e4r inte ett v\u00e5ghalsigt rymningsf\u00f6rs\u00f6k \u2013 f\u00e4ngelset st\u00e4ngde runt 50 \u00e5r tidigare. Aaron arbetar som arkitekt hos Wiss, Janney, Elstner Associates Inc. (WJE) i Emeryville i Kalifornien. Han \u00e4r en del av firmans team f\u00f6r sv\u00e5r\u00e5tkomliga omr\u00e5den och hans jobb var att f\u00f6rs\u00f6ka fastst\u00e4lla vilka delar av byggnadens betongv\u00e4ggar som var i st\u00f6rst behov av reparationer f\u00f6r att f\u00f6rhindra att den f\u00f6ll samman. Vattnet runt Alcatraz Island \u00e4r \u00f6k\u00e4nt f\u00f6r att vara skoningsl\u00f6st. Det s\u00e4gs att ingen kunde \u00f6verleva i de iskalla temperaturerna, \u00e4ven om man lyckades ta sig f\u00f6rbi Alcatraz Federal Penitentiarys f\u00e4stningliknande v\u00e4ggar. Nu har Alcatraz f\u00f6rvaltare, National Park Service, insett att det obarmh\u00e4rtiga havet har en dubbel inverkan. \u00d6ver hundra \u00e5r med vinande vindar, piskande regn och saltfylld dimma har tagit ut sin r\u00e4tt p\u00e5 \u00f6ns infrastruktur. Framf\u00f6r allt har de f\u00f6rst\u00e4rkande gallren i armeringsst\u00e5l korroderat och orsakat sprickor och flisor i betongv\u00e4ggarna.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Sv\u00e5ra milj\u00f6f\u00f6rh\u00e5llanden bidrog till strukturellt f\u00f6rfall<\/h3>\n\n\n\n<p>WJE \u00e4r en arkitekt- och ingenj\u00f6rsfirma som specialiserar sig p\u00e5 utmanande reparations- och \u00e5teruppbyggnadsprojekt. Firman har jobbat med Alcatraz cellbyggnad sedan slutet av 90-talet. I arbetets tidiga faser fokuserade man p\u00e5 att f\u00f6rst\u00e4rka strukturen och reparera k\u00e4llaren och cellblocken. De bestod \u201di princip av betongl\u00e5dor staplade p\u00e5 varandra inuti ett stort skal\u201d, enligt Aaron. Han involverades i projektet mot slutet av reparationsarbetet i k\u00e4llaren och bidrog avsev\u00e4rt till n\u00e4sta fas i arbetet: restaurera fasaden p\u00e5 den historiska cellbyggnaden.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Extrema kriminaltekniska metoder f\u00f6r ingenj\u00f6rsutredning<\/h3>\n\n\n\n<p>De utv\u00e4ndiga betongv\u00e4ggarna \u201dhade f\u00f6rst\u00f6rts avsev\u00e4rt i vissa omr\u00e5den, s\u00e4rskilt i de s\u00f6dra och v\u00e4stliga upph\u00f6jda delarna som uts\u00e4tts f\u00f6r intensivt solljus och kraftig vind och dimma\u201d, s\u00e4ger Aaron. Ett team p\u00e5 tio personer anv\u00e4nde sig av industriellt reparbete \u2013 en arbetsform som liknar firning \u2013 f\u00f6r att unders\u00f6ka byggnaden. Man hamrade p\u00e5 betongen f\u00f6r att hitta l\u00f6sa eller delaminerade omr\u00e5den och registrerade uppgifterna f\u00f6r att planera reparationsarbetet.<\/p>\n\n\n\n<p>N\u00e4r finansieringen f\u00f6r f\u00f6rsta fasen i fasadreparationen var klar hade flera \u00e5r redan g\u00e5tt och man visste inte exakt hur mycket mer de yttre v\u00e4ggarna hade f\u00f6rfallit sedan den inledande unders\u00f6kningen. En andra, mer selektiv utredning genomf\u00f6rdes med hj\u00e4lp av reparbete. Man fokuserade d\u00e5 p\u00e5 fasadens mest f\u00f6rfallna och s\u00e5rbara delar. Syftet med uppf\u00f6ljningsutredningen var att uppskatta hur stort f\u00f6rfallet var sedan den f\u00f6reg\u00e5ende unders\u00f6kningen och att installera korrosions\u00f6vervakande utrustning s\u00e5 att ingenj\u00f6rerna kunde se hur korrosionen fortskred \u00f6ver tid. Man borrade h\u00e5l i v\u00e4ggarna och b\u00e4ddade in elektroder som m\u00e4tte den elektriska potentialen mellan armeringsj\u00e4rnet och den anslutande betongen. Genom att m\u00e4ta den elektriska potentialen inuti v\u00e4ggarna f\u00f6rstod ingenj\u00f6rerna om de elektrokemiska f\u00f6rh\u00e5llandena inuti v\u00e4ggarna kunde orsaka korrosion och hur dessa f\u00f6rh\u00e5llanden varierade \u00f6ver tid. WJF tog fram \u00e5rskartor \u00f6ver sprickorna och tog detaljerade foton. Sedan j\u00e4mf\u00f6rde de uppgifterna och fotona varje \u00e5r f\u00f6r att s\u00e4tta utbredningen av visuellt f\u00f6rfall i samband med data fr\u00e5n de inb\u00e4ddade elektroderna.<\/p>\n\n\n\n<p>F\u00f6r Aaron var den h\u00e4r typen av process v\u00e4lbekant eftersom han ofta anv\u00e4nder sig av den senaste tekniken n\u00e4r han arbetar p\u00e5 historiska byggnader. Han anv\u00e4nder ofta <a href=\"https:\/\/www.bluebeam.com\/se\/solutions\/revu\" target=\"_blank\" rel=\"noreferrer noopener\">Bluebeam Revu<\/a> som \u00e4r en ledande programvara f\u00f6r PDF-markering och samarbete. Aaron har utvecklat ett unikt verktyg i Revu med hj\u00e4lp av sekvensfunktionen som indexerar foton han tar p\u00e5 arbetsplatsen i PDF-planer eller upph\u00f6jningar. Han har programmerat Revu till att identifiera de foton han tar i den sekvens de tas och placera dem i PDF:en p\u00e5 de exakta platser d\u00e4r de togs. Originalfotofilerna kan sedan lagras p\u00e5 en h\u00e5rddisk eller n\u00e4tverksserver och hyperl\u00e4nkas via Batch Link-funktionen i Revu eXtreme. Slutprodukten \u00e4r en PDF-fil med platsspecifika fotomarkeringar som \u00e4r hyperl\u00e4nkade till att \u00f6ppna den faktiska fotofilen. P\u00e5 s\u00e5 s\u00e4tt kan anv\u00e4ndaren bl\u00e4ddra fram\u00e5t och bak\u00e5t i mappen med foton tagna i omr\u00e5det. L\u00f6sningen ger en platsbaserad navigering i fotona utan att PDF:en fylls av inb\u00e4ddade foton och \u00f6verdrivet m\u00e5nga markeringar, vilket hade \u00f6kat filstorleken avsev\u00e4rt. Ju st\u00f6rre projekt, desto v\u00e4rdefullare \u00e4r processen. Det blir enkelt att navigera bland hundratals eller till och med tusentals foton baserat p\u00e5 var de togs i en byggnad eller p\u00e5 en arbetsplats. Aarons fotosekvensverktyg och hyperl\u00e4nkprocess inspirerades av en unik funktion i WJE:s egna programvara PLANNOTATE, som har tagits fram specifikt f\u00f6r insamling av f\u00e4ltdata (och foton) i PDF:er p\u00e5 ett liknande, navigerbart s\u00e4tt.<\/p>\n\n\n\n<p>WJE:s arkitekter och ingenj\u00f6rer f\u00f6rlitar sig i stor utstr\u00e4ckning p\u00e5 insamlad f\u00e4ltdata f\u00f6r att utv\u00e4rdera och l\u00f6sa komplexa ingenj\u00f6rs- och byggproblem. Revu har hj\u00e4lpt dem att effektivisera sin process, samla in och hantera data, samarbeta med andra och dela och sprida information, s\u00e5 att de kan koncentrera sig p\u00e5 att l\u00f6sa branschens mest utmanande problem. I n\u00e4sta fas av restaurationsarbetet p\u00e5 Alcatraz cellbyggnad ska man reparera och f\u00f6rst\u00e4rka sjukhusflygeln. S\u00e5 om du \u00e4r i San Fransisco, tittar ut mot det \u00f6k\u00e4nda f\u00e4ngelset i bukten och ser en grupp m\u00e4nniskor som h\u00e4nger fr\u00e5n sidan av byggnaden \u2013 ta det lugnt. Det \u00e4r inte sp\u00f6kena av gamla f\u00e5ngar. Det \u00e4r troligtvis kriminaltekniska arkitekter och ingenj\u00f6rer som utf\u00f6r sitt arbete och st\u00f6ttar upp f\u00e4ngelset s\u00e5 att det ska st\u00e5 i hundra \u00e5r till.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>WJE anv\u00e4nder kriminalteknisk ingenj\u00f6rsteknik f\u00f6r att reparera det \u00f6k\u00e4nda f\u00e4ngelset.<\/p>\n","protected":false},"author":571,"featured_media":78763,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[145,144],"tags":[16722],"class_list":["post-78755","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-innovation","category-projects","tag-architecture","category-145","category-144","description-off"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u00c5teruppbygga Alcatraz - Built | SE<\/title>\n<meta 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