Lovat & Copco successes

摘要

Lovat earth pressure balance TBMs recently holed through on Line 1 of Seville's metro and the second section of the Big Walnut Outfall Augmentation Sewer (BWOAS) in Columbus, Ohio.rnIn Spain, the 6.05m diameter mixed face EPBM completed the 2334m long drive with the entire alignment below groundwater level with maximum height above the invert of 15m.rnDriving mainly through gravel with sandy sections, and blue marts, the EPBM achieved best progress rates of 29.4m in a day, 133m in a week and 333m in a month. Contractor on the project is a JV of Dragados, Sacyr and Cavosa, and the machine is now being prepared for relaunch on the twin tunnel project.