{"id":10716,"date":"2018-10-23T15:21:17","date_gmt":"2018-10-23T22:21:17","guid":{"rendered":"http:\/\/robbinstbm.com\/?p=10716"},"modified":"2019-05-01T14:34:35","modified_gmt":"2019-05-01T21:34:35","slug":"atlanta-breakthrough","status":"publish","type":"post","link":"https:\/\/www.robbinstbm.com\/es\/atlanta-breakthrough\/","title":{"rendered":"Tough TBM and Team Overcome the Odds with Atlanta Breakthrough"},"content":{"rendered":"<p>On October 4, 2018, onlookers watched as a 3.8 m (12.5 ft) diameter Robbins Main Beam TBM completed its epic journey. The TBM, christened \u201cDriller Mike\u201d, after local rapper and activist \u201cKiller Mike\u201d, overcame extremely hard rock conditions along a curving 8.0 km (5.0 mi) tunnel to bolster the city of Atlanta, Georgia, USA\u2019s water supply.<\/p>\n<p>The new tunnel brings the Atlanta Water Supply Program one step closer to increasing the city\u2019s water capacity to between 30 and 90 days depending on daily usage. \u201cOur schedule for the project was very aggressive but the project team stayed together to overcome issues related to the mining of the tunnel,\u201d said Bob Huie, Project Director for the PC Russell JV, the Construction Manager at Risk (CMAR) for the project.<\/p>\n\t\t<div class=\"post-gallery\">\n\t\t\t<div class=\"gallery-previous\"><\/div>\n\t\t\t<div class=\"gallery-next\"><\/div>\n\t\t\t<ul>\n\t\t\t\t\t\t\t<li class=\"gallery-image-0\"><div class=\"gallery-image\" style=\"background-image:url(https:\/\/www.robbinstbm.com\/wp-content\/uploads\/2018\/10\/Image-2-1.jpg);\"><\/div><\/li>\n\t\t\t\t\t\t\t\t<li class=\"gallery-image-1\"><div class=\"gallery-image\" style=\"background-image:url(https:\/\/www.robbinstbm.com\/wp-content\/uploads\/2018\/10\/Image-1-1.jpg);\"><\/div><\/li>\n\t\t\t\t\t\t\t\t<li class=\"gallery-image-2\"><div class=\"gallery-image\" style=\"background-image:url(https:\/\/www.robbinstbm.com\/wp-content\/uploads\/2018\/10\/Image-4-1.jpg);\"><\/div><\/li>\n\t\t\t\t\t\t\t\t<li class=\"gallery-image-3\"><div class=\"gallery-image\" style=\"background-image:url(https:\/\/www.robbinstbm.com\/wp-content\/uploads\/2018\/10\/Image-3-1.jpg);\"><\/div><\/li>\n\t\t\t\t\t\t\t<\/ul>\n\t\t<\/div>\n\t\t\n<p>The unique structure of the project team is credited with the overall project success despite challenges. \u201cI\u2019m proud of our team. They had obstacles and challenges and challenging ground, but they stuck together and didn\u2019t give up, and they were successful. There was great leadership and supervision all around,\u201d said Larry Weslowski, Tunnel Superintendent for the PC Russell JV.<\/p>\n<p>The project is only the third such large construction project in the U.S. to use the CMAR structure.\u00a0 The PC Construction\/HJ Russell JV was selected as the CMAR for the project, who then purchased the Robbins Main Beam TBM for the tunnel.\u00a0 The designer for the construction works including tunnel and shafts, JP2\u2014consisting of Stantec, PRAD Group, Inc., and River 2 Tap\u2014specified the hard rock TBM.\u00a0 Operation and assembly of the TBM was then sub-contracted to the Atkinson\/Technique JV.<\/p>\n<p>The robust TBM was assembled using Onsite First Time Assembly (OFTA) at the massive Bellwood Quarry site with help from Robbins personnel. \u201cThe guys built everything per the specs to help with scheduling. It was a challenge but there was no negativity during the process,\u201d said Weslowski. Despite summer temperatures hitting 43 degrees Celsius (110 degrees Fahrenheit) and 100 percent humidity, the TBM was ready to launch by October 2016.<\/p>\n<p>Hard granitic rock challenged the 19-inch disc cutters from the outset. \u201cThere was ground so hard that it would take eight hours to go 1.5 m (5 ft). It was between 117 and 310 MPa (17,000 and 45,000 psi) UCS. The beginning of the job was tough,\u201d said Weslowski, but he added that once the learning curve had been overcome \u201cthey started breaking project records left and right towards the end.\u00a0 We got a best day of 38.4 m (126 ft). Rates just kept increasing.\u201dOther challenges included groundwater encountered during tunneling. \u201cWe did encounter groundwater contamination that required remediation. This remediation work was completed successfully,\u201d said Huie.<\/p>\n<p>With tunneling complete, the USD $300 million project for the City of Atlanta\u2019s Department of Watershed Management is on track to meet its scheduled overall completion date of September 2019. The project will turn the inactive Bellwood quarry into a 9.1 billion liter (2.4 billion gallon) raw water storage facility connecting with the Chattahoochee River and various water treatment facilities.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>On October 4, 2018, onlookers watched as a 3.8 m (12.5 ft) diameter Robbins Main Beam TBM completed its epic journey. The TBM, christened \u201cDriller Mike\u201d, after local rapper and activist \u201cKiller Mike\u201d, overcame extremely hard rock conditions along a curving 8.0 km (5.0 mi) tunnel to bolster the city of Atlanta, Georgia, USA\u2019s water supply.<\/p>\n","protected":false},"author":2,"featured_media":10720,"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-10716","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-es","category-press-releases-es"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Tough TBM and Team Overcome the Odds with Atlanta Breakthrough - 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\/atlanta-breakthrough\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tough TBM and Team Overcome the Odds with Atlanta Breakthrough - Robbins\" \/>\n<meta property=\"og:description\" content=\"On October 4, 2018, onlookers watched as a 3.8 m (12.5 ft) diameter Robbins Main Beam TBM completed its epic journey. 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