{"id":6422,"date":"2014-06-01T23:00:16","date_gmt":"2014-06-01T23:00:16","guid":{"rendered":"http:\/\/robbinstbm.com\/sin-categorizar\/2010\/04\/17\/blue-mountains-sewerage-scheme-case-history-hazelbrook-katoomba-tunnels\/"},"modified":"2017-06-06T19:08:35","modified_gmt":"2017-06-07T02:08:35","slug":"mixed-ground-epbs","status":"publish","type":"post","link":"https:\/\/www.robbinstbm.com\/es\/mixed-ground-epbs\/","title":{"rendered":"Achieving Fast EPB Advance in Mixed Ground: A Study of Contributing Factors"},"content":{"rendered":"

Earth Pressure Balance (EPB) tunneling in mixed ground conditions is a challenging prospect, as it often includes excavation in boulder fields, sections of rock, and\/or sticky clay, under high water pressure or changing water pressure. Maintaining a rapid advance rate in such conditions is a function of many factors\u2014from adequate cutting tools to cutterhead design, pre-planning and execution of an appropriate ground conditioning regime as well as proper maintenance and operation of the TBM. This paper will analyze recent record-breaking and high-performing projects seeking to identify factors that contribute to fast machine advance. These factors will then be discussed and an effort made to form simple, high level guidelines for optimal TBM excavation in mixed ground conditions.<\/p>\n","protected":false},"excerpt":{"rendered":"

This paper analyzes recent record-breaking and high-performing projects seeking to identify factors that contribute to fast machine advance. These factors are then discussed and an effort made to form simple, high level guidelines for optimal TBM excavation in mixed ground conditions.<\/p>\n","protected":false},"author":2,"featured_media":13451,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[49],"tags":[],"class_list":["post-6422","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-white-papers-es"],"acf":[],"yoast_head":"\nAchieving Fast EPB Advance in Mixed Ground: A Study of Contributing Factors - 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\/es\/mixed-ground-epbs\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Achieving Fast EPB Advance in Mixed Ground: A Study of Contributing Factors - Robbins\" \/>\n<meta property=\"og:description\" content=\"This paper analyzes recent record-breaking and high-performing projects seeking to identify factors that contribute to fast machine advance. 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