As Epiroc and Orica claim, they have co-developed the world’s first semi-automated, wireless explosives delivery system for using in blast operations and hard rock drill. The technology intends to guarantee that the right explosives are safely delivered into the right holes within the right timeframe for improved efficiency and safety. ‘Avatel’ enables charge crews to […]
Saudi Arabia’s Saline Water Conversion Corporation (SWCC) bored an 8.4 m diameter * 12.5 km length Water Conversion Tunnel, dubbed as the world’s longest water transmission project, through the Sarwat Mountains. SWCC deployed a 160m long TBM to travel the distance from Jabal Al-Kar to the Ring Road in Taif to ensure sufficient water supply […]
Terratec has announced that the 4.66m diameter EPBM ‘Eva’ has passed its site acceptance test and is currently being driven on the 13.5km long Ro Subterráneo a Lomas tunnel in Buenos Aires, Argentina, by Italian tunnel contractor CMC di Ravenna. The tunnel that will transport drinking water from the newly expanded General Belgrano Water Treatment […]
Taiwan, Taipei-I lan expressway, Hsuehshan Tunnel, in length of 12.9 Km, the full face TBMs (Tunnel Boring Machines) with an 11.74m boring diameter will be applied for tunnel excavation for both the East Bound and West Bound main tunnels. Since, it is the first time contract specification called for the largest diameter of Telescope / […]
This paper is to discuss TBM tunnelling in difficult ground conditions, when problems are met which may reduce dramatically the average progress rates and practical consequences may be such as to pose seri- ous questions on the use of mechanised TBM tunnelling versus drill and blast and other so-called traditional excavation methods. Following a few […]
The new high speed railway lines under construction in Europe foreseen the execution of very long large diameter tunnels under the most variable rock conditions. Standard Single Shield and Double Shield TBM are not always the right answer for the excavation of these tunnels, especially when adverse rock conditions are expected with rapid squeezing ground […]
