{"id":119213,"date":"2012-04-03T23:17:12","date_gmt":"2012-04-03T23:17:12","guid":{"rendered":"https:\/\/transinfo.pl\/x\/infotram\/warszawa-tysieczny-pierscien-dla-metra-gotowy\/"},"modified":"2012-04-03T23:17:12","modified_gmt":"2012-04-03T23:17:12","slug":"warszawa-tysieczny-pierscien-dla-metra-gotowy","status":"publish","type":"infotram","link":"https:\/\/transinfo.pl\/x\/infotram\/warszawa-tysieczny-pierscien-dla-metra-gotowy\/","title":{"rendered":"Warszawa: Tysi\u0119czny pier\u015bcie\u0144 dla metra gotowy"},"content":{"rendered":"<p>Trwaj\u0105 ostatnie przygotowania do opuszczenia pierwszej tarczy TBM do szybu startowego przy Rondzie Daszy\u0144skiego. Jednocze\u015bnie w halach przy ul. Marywilskiej, prowadzona jest produkcja element&oacute;w obudowy tuneli. 3 kwietnia 2012 roku wyprodukowany zosta\u0142 tam tysi\u0119czny pier\u015bcie\u0144. <br \/>Pier\u015bcie\u0144 obudowy tunelu to pot\u0119\u017cna konstrukcja o \u015brednicy ok 6,5 m., sk\u0142adaj\u0105ca si\u0119 z 5 element&oacute;w podstawowych i jednego klucza (elementu w formie trapezu, kt&oacute;ry zamyka pier\u015bcie\u0144). Do jego wykonania potrzebnych jest 8 m3 mieszanki betonu, w\u0142&oacute;kien polipropylenowych i ok 600 kg stalowej konstrukcji zbrojenia. Ka\u017cdy taki pier\u015bcie\u0144 wa\u017cy a\u017c 20 ton. \u0141\u0105cznie, dla centralnego odcinka II linii metra, wyprodukowanych ma by\u0107 ok. 7000 pier\u015bcieni czyli ponad 42.000 element&oacute;w. <br \/>Zanim tarcza rozpocznie dr\u0105\u017cenie tunelu i uk\u0142adanie obudowy, szyb startowy musia\u0142 zosta\u0107 odpowiednio przygotowany. W \u015bcianie szczelinowej, w miejscu gdzie tarcza rozpocznie dr\u0105\u017cenie, zbudowany zosta\u0142 stalowy pier\u015bcie\u0144 uszczelniaj\u0105cy. Jego zadaniem jest umo\u017cliwienie rozpocz\u0119cia prac tarczy i zapobieganie dostawaniu si\u0119 wody gruntowej do stacji. Wa\u017c\u0105ce ok 400 ton czo\u0142o tarczy, aby przebi\u0107 betonow\u0105 \u015bcian\u0119 i wgry\u017a\u0107 si\u0119 w grunt b\u0119dzie musia\u0142a si\u0119 od czego\u015b odepchn\u0105\u0107. W tym celu montowana jest stalowa rama z trzema podw&oacute;jnymi kotwiami. Nast\u0119pnie tarcza odpycha\u0107 si\u0119 b\u0119dzie za pomoc\u0105 si\u0142ownik&oacute;w hydraulicznych, od kolejnych u\u0142o\u017conych fragment&oacute;w obudowy.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"","ping_status":"closed","template":"","categories":[23],"tags":[695,852,84],"class_list":["post-119213","infotram","type-infotram","status-publish","hentry","category-infrastruktura","tag-budowa","tag-metro","tag-warszawa"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.8 (Yoast SEO v23.7) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Warszawa: Tysi\u0119czny pier\u015bcie\u0144 dla metra gotowy - TransInfo Archiwum<\/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:\/\/transinfo.pl\/x\/infotram\/warszawa-tysieczny-pierscien-dla-metra-gotowy\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Warszawa: Tysi\u0119czny pier\u015bcie\u0144 dla metra gotowy\" \/>\n<meta property=\"og:description\" content=\"Trwaj\u0105 ostatnie przygotowania do opuszczenia pierwszej tarczy TBM do szybu startowego przy Rondzie Daszy\u0144skiego....\" \/>\n<meta property=\"og:url\" content=\"https:\/\/transinfo.pl\/x\/infotram\/warszawa-tysieczny-pierscien-dla-metra-gotowy\/\" \/>\n<meta property=\"og:site_name\" content=\"TransInfo Archiwum\" \/>\n<meta property=\"og:image\" content=\"http:\/\/default\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Szacowany czas czytania\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minuta\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/transinfo.pl\/x\/infotram\/warszawa-tysieczny-pierscien-dla-metra-gotowy\/\",\"url\":\"https:\/\/transinfo.pl\/x\/infotram\/warszawa-tysieczny-pierscien-dla-metra-gotowy\/\",\"name\":\"Warszawa: Tysi\u0119czny pier\u015bcie\u0144 dla metra gotowy - 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