{"id":8908,"date":"2017-06-12T12:11:34","date_gmt":"2017-06-12T19:11:34","guid":{"rendered":"http:\/\/robbinstbm.com\/?p=8908\/"},"modified":"2017-07-11T13:48:25","modified_gmt":"2017-07-11T20:48:25","slug":"rossaga","status":"publish","type":"post","link":"https:\/\/www.robbinstbm.com\/es\/rossaga\/","title":{"rendered":"The Return of TBMs to Norway at R\u00f8ss\u00e5ga HEPP\u2014TBM Operation Through Extremely Hard Rock, Unstable Rock Mass, and Other Challenges"},"content":{"rendered":"<p>The TBM that broke though at\u00a0R\u00f8ss\u00e5ga HEPP in December 2015 was the first to breakthrough in Norway in more than 20 years. During the excavation the TBM encountered extremely hard rock (over 280 MPa), which posed an extreme challenge for both the TBM and the cutters. During the excavation a highly efficient main bearing replacement was also performed in the tunnel. This paper discusses\u00a0the project as a whole, including TBM design, Onsite First Time Assembly (OFTA) of the machine, challenges faced, and project outcomes.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The TBM that broke though at R\u00f8ss\u00e5ga HEPP in December 2015 was the first to breakthrough in Norway in more than 20 years. During the excavation the TBM encountered extremely hard rock (over 280 MPa), which posed an extreme challenge for both the TBM and the cutters.<\/p>\n","protected":false},"author":10,"featured_media":8910,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[49],"tags":[],"class_list":["post-8908","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-white-papers-es"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The Return of TBMs to Norway at R\u00f8ss\u00e5ga HEPP\u2014TBM Operation Through Extremely Hard Rock, Unstable Rock Mass, and Other Challenges - Robbins<\/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:\/\/www.robbinstbm.com\/rossaga\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Return of TBMs to Norway at R\u00f8ss\u00e5ga HEPP\u2014TBM Operation Through Extremely Hard Rock, Unstable Rock Mass, and Other Challenges - Robbins\" \/>\n<meta property=\"og:description\" content=\"The TBM that broke though at R\u00f8ss\u00e5ga HEPP in December 2015 was the first to breakthrough in Norway in more than 20 years. During the excavation the TBM encountered extremely hard rock (over 280 MPa), which posed an extreme challenge for both the TBM and the cutters.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.robbinstbm.com\/rossaga\/\" \/>\n<meta property=\"og:site_name\" content=\"Robbins\" \/>\n<meta property=\"article:published_time\" content=\"2017-06-12T19:11:34+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2017-07-11T20:48:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.robbinstbm.com\/wp-content\/uploads\/2017\/07\/Image-5-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"3072\" \/>\n\t<meta property=\"og:image:height\" content=\"2304\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Sarah Crawford\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@Robbins_Co\" \/>\n<meta name=\"twitter:site\" content=\"@Robbins_Co\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Sarah Crawford\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.robbinstbm.com\\\/rossaga\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.robbinstbm.com\\\/rossaga\\\/\"},\"author\":{\"name\":\"Sarah Crawford\",\"@id\":\"https:\\\/\\\/www.robbinstbm.com\\\/#\\\/schema\\\/person\\\/499076d37f572217dede2731f15ba4a2\"},\"headline\":\"The Return of TBMs to Norway at R\u00f8ss\u00e5ga HEPP\u2014TBM Operation Through Extremely Hard Rock, Unstable Rock Mass, and Other Challenges\",\"datePublished\":\"2017-06-12T19:11:34+00:00\",\"dateModified\":\"2017-07-11T20:48:25+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.robbinstbm.com\\\/rossaga\\\/\"},\"wordCount\":108,\"publisher\":{\"@id\":\"https:\\\/\\\/www.robbinstbm.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.robbinstbm.com\\\/rossaga\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.robbinstbm.com\\\/wp-content\\\/uploads\\\/2017\\\/07\\\/Image-5-1.jpg\",\"articleSection\":[\"White Papers\"],\"inLanguage\":\"es-ES\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.robbinstbm.com\\\/rossaga\\\/\",\"url\":\"https:\\\/\\\/www.robbinstbm.com\\\/rossaga\\\/\",\"name\":\"The Return of TBMs to Norway at R\u00f8ss\u00e5ga HEPP\u2014TBM Operation Through Extremely Hard Rock, Unstable Rock Mass, and Other Challenges - 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