BREAKTHROUGH ON THE GEREDE WATER TRANSMISSION TUNNEL

摘要

Excavation works on a 9km-long section of the Gerede Water Transmission Tunnel completed in December. The 31.6km tunnel, the longest water tunnel in Turkey, will go into operation in March and provide drinking water to Ankara. Contractor Kolin-Limak JV finished boring the section of the project with a 5.56m-diameter Robbins Crossover (XRE) machine, after earlier efforts had ground to a halt. Geology consisted of extremely difficult ground, including sandstone agglomerate, limestone and tuff.