Kargi Hydroelectric Project: TBM conquers difficult Ground
Multiple fault zones, variable face conditions and squeezing ground requiring extensive bypass tunneling: These were just a few of the challenges overcome in order to successfully complete Turkey’s Kargı Kızılırmak Hydroelectric Project. A Robbins 10 m (32.8 ft) diameter Double Shield TBM achieved breakthrough on the project July 5, 2014 after a run through some of the most difficult conditions ever encountered by Robbins field teams. The machine type, selected jointly by the owner, consultants, Robbins, and the contractor Gülermak of Turkey, excavated through 7.8 km (4.8 mi) of complex...