Double Shield TBM
Lanzhou Water Source Project, China
This project aims to supply water to Lanzhou City from Liujiaxia Reservoir. The TBM tunnel is about 24.4km with maximum overburden of 918m and rocks with high strength. CREG supplied a double shield TBM with boring diameter of 5.48m, which has efficient hard rock cutting capacity and emergency handling ability. The TBM was launched on February 4th, 2016.
Koralm Railway Project, Austria
This is a twin-tunnel project for high speed train route in Austria. The tunnels go through Koralpe Mountain (also referred to as Koralm) with total length of 35.2km, which is part of the 130-kilometer railway link connecting Graz and Klagenfurt. A telescopic hard rock TBM with diameter of 9.93m plus electric drive is deployed therein. TBM installed power is 2,800KW and maximum drive torque 30,000KNm. This machine has commenced tunnelling since the end of 2012.