{"id":6414,"date":"2014-06-01T23:00:55","date_gmt":"2014-06-01T23:00:55","guid":{"rendered":"http:\/\/robbinstbm.com\/%e6%9c%aa%e5%88%86%e7%b1%bb\/2010\/04\/17\/high-performance-tunnel-boring-machine-queens-water-tunnel-no-3-design-case-history\/"},"modified":"2017-06-28T10:43:20","modified_gmt":"2017-06-28T17:43:20","slug":"emisor-oriente","status":"publish","type":"post","link":"https:\/\/www.robbinstbm.com\/zh-hans\/emisor-oriente\/","title":{"rendered":"Lessons learned from construction of the 62km Emisor Oriente Tunnel in Mexico’s challenging and varied ground"},"content":{"rendered":"

In April 2009, tunnel boring started on the Tunnel Emisor Oriente (TEO) sewer project after decades of deliberation. The infrastructure will replace an open, untreated canal that conveys wastewater from Mexico City. The new tunnel will end at the capital\u2019s first wastewater treatment plant and reduce the risk of catastrophic flooding in downtown Mexico City. It was this risk that led President Felipe Calderon to label the project a \u201cNational Emergency\u201d. The TEO project was designed as a 62 km pipeline of 8.9 m diameter with a primary precast concrete segmental lining and a secondary in-situ concrete lining. 24 shafts up to 150 m deep support six TBM operations totaling about 10 km each. After five years of work, 34% of the bore is complete, and the owner of the project, CONAGUA, is rethinking their strategy based on incredibly difficult ground. This paper will discuss the new strategy from both the contractor and manufacturer perspective, including successful TBM modifications.<\/p>\n","protected":false},"excerpt":{"rendered":"

In April 2009, tunnel boring started on the Tunnel Emisor Oriente (TEO) sewer project after decades of deliberation. 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