{"id":11179,"date":"2019-07-15T12:23:20","date_gmt":"2019-07-15T19:23:20","guid":{"rendered":"https:\/\/robbinstbm.com\/?p=11179"},"modified":"2019-07-15T12:23:20","modified_gmt":"2019-07-15T19:23:20","slug":"overcoming-extreme-tunneling-conditions","status":"publish","type":"post","link":"https:\/\/www.robbinstbm.com\/es\/overcoming-extreme-tunneling-conditions\/","title":{"rendered":"Overcoming Extreme Tunneling Conditions in Vietnam’s Longest Tunnel"},"content":{"rendered":"

Vietnam\u2019s Thuong Kon Tum Hydroelectric project is a 17.4 km headrace tunnel that will be the country\u2019s longest once complete. A section of the tunnel was excavated by a 4.5 m diameter Main Beam TBM in granitic rock up to 250 MPa UCS. Started in 2012, the project\u2019s original contractor left due to non-satisfactory performance. In 2016, the contract to refurbish the TBM and excavate the remaining 10.45 km of tunnel was awarded to a joint venture of Robbins and a local contractor. Robbins was fully responsible for the TBM operation, including supplying operational crews. The crew overcame massive granitic rock, fault zones gushing water at 600 l\/s, and difficult conditions. In under two years, the TBM advanced from a standstill at 15 percent project completion to 85 percent complete. This paper addresses the refurbishment of the TBM in the tunnel, the work to streamline operation, and challenges faced.<\/p>\n","protected":false},"excerpt":{"rendered":"

In 2016, the contract to refurbish the TBM at Vietnam’s Thuong Kon Tum and excavate the remaining 10.45 km of tunnel was awarded to a joint venture of Robbins and a local contractor. Robbins was fully responsible for the TBM operation, including supplying operational crews. In under two years, the TBM advanced from a standstill at 15 percent project completion to 85 percent complete. This paper addresses the refurbishment of the TBM in the tunnel, the work to streamline operation, and challenges faced.<\/p>\n","protected":false},"author":2,"featured_media":11183,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[7],"tags":[],"class_list":["post-11179","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-white-papers"],"acf":[],"yoast_head":"\nOvercoming Extreme Tunneling Conditions in Vietnam's Longest Tunnel - 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\/overcoming-extreme-tunneling-conditions\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Overcoming Extreme Tunneling Conditions in Vietnam's Longest Tunnel - Robbins\" \/>\n<meta property=\"og:description\" content=\"In 2016, the contract to refurbish the TBM at Vietnam's Thuong Kon Tum and excavate the remaining 10.45 km of tunnel was awarded to a joint venture of Robbins and a local contractor. Robbins was fully responsible for the TBM operation, including supplying operational crews. In under two years, the TBM advanced from a standstill at 15 percent project completion to 85 percent complete. 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