{"id":10591,"date":"2018-06-18T16:36:37","date_gmt":"2018-06-18T23:36:37","guid":{"rendered":"http:\/\/robbinstbm.com\/?p=10591"},"modified":"2018-09-13T08:30:16","modified_gmt":"2018-09-13T15:30:16","slug":"jilin-breakthrough","status":"publish","type":"post","link":"https:\/\/www.robbinstbm.com\/es\/jilin-breakthrough\/","title":{"rendered":"Record-Setting Robbins TBM breaks through at China\u2019s Jilin project"},"content":{"rendered":"

In mid-May 2018 the national-record-setting 7.9 m (26 ft) Robbins Main Beam TBM at the Jilin Lot 3 Tunnel<\/a> broke through. A formal ceremony followed to commemorate the stellar performance of the tunneling operation and its early completion. \u201cI have participated in this project from the beginning. The project broke through 147 days earlier than scheduled. The project has achieved the fastest monthly advance rate record–1423.5 m\/4,670 ft\u2014for 7 to 8 m (23 to 26 ft) diameter TBMs in China. And the machine has reached over 1000 m (3,280 ft) per month for three consecutive months. I am so proud of these achievements,\u201d said Mr. Wu Zhi Yong, Vice Chief Engineer and Jilin Yinsong Project Vice General Manager for contractor Beijing Vibroflotation Engineering Co. Ltd. (BVEC).<\/p>\n\t\t

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    The completion of the 24.3 km (15 mi) tunnel nearly five months ahead of schedule is a monumental achievement considering the difficult ground conditions encountered. Rock types ranged from tuff to granite, sandstone, and andesite with multiple fault zones\u2014conditions requiring nearly continuous ground support.\u00a0 Rock strengths varied widely from 35 to 206 MPa UCS (5,100 to 30,000 psi).\u00a0 The contractor cited a number of factors that contributed to the swift advance rates: \u201cIt is the stable and reliable performance of the Robbins machine, and the professional technical skills of the service technicians. The Robbins crew coordination, reasonable working progress arrangements and the sophisticated technology all allowed the project to make the fast advance rate,\u201d said Mr. Wu.<\/p>\n

    The Robbins Main Beam TBM bored through a total of 24 fault zones utilizing a unique combination of steel McNally slats (extruded through pockets in the TBM roof shield to prevent movement of loose rock), wire mesh, and shotcrete. The TBM was specifically designed to tackle the tough conditions. \u201cUnder the variable ground conditions, especially weak, soft, and fractured rock, the optimized system and reasonable design of the machine ensured effective tunneling progress. Robbins\u2019 unique gripper system, continuous propel system, hydraulic drives, roof support and stable cutterhead reduced the wear of cutters.The efficient belt conveyor inside the main beam allowed quick muck removal from the cutterhead to the back of the machine, which ensured the good progress of the TBM,\u201d said Mr. Wu.<\/p>\n

    The Jilin Lot 3 tunnel is part of the Jilin Yinsong Water Supply Project, which at 736.3 km (457.5 mi) is China\u2019s largest scale water diversion project to date. Once operational the water lines will divert the water from Fengman Reservoir at the upper reaches of Di\u2019er Songhua River to central regions of Jilin Province experiencing chronic water shortages. These regions include the cities of Changchun and Siping, eight surrounding counties, and 26 villages and towns under their jurisdiction. The project will optimize water resource distribution, improve regional eco-systems, and ensure better food production and water safety for the people of Jilin Province.<\/p>\n","protected":false},"excerpt":{"rendered":"

    In mid-May 2018 the national-record-setting 7.9 m (26 ft) Robbins Main Beam TBM at the Jilin Lot 3 Tunnel broke through. The TBM completed the tunnel nearly five months (147 days) ahead of schedule. <\/p>\n","protected":false},"author":2,"featured_media":10592,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[110,113],"tags":[],"class_list":["post-10591","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-es","category-press-releases-es"],"acf":[],"yoast_head":"\nRecord-Setting Robbins TBM breaks through at China\u2019s Jilin project - 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\/jilin-breakthrough\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Record-Setting Robbins TBM breaks through at China\u2019s Jilin project - Robbins\" \/>\n<meta property=\"og:description\" content=\"In mid-May 2018 the national-record-setting 7.9 m (26 ft) Robbins Main Beam TBM at the Jilin Lot 3 Tunnel broke through. 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