The patented EK series chain cutters with their rotating chain between the two lateral cutter drums are a core product of Kemroc. But the German specialist manufacturer has massively expanded its...
The Vötting road tunnel will help relieve traffic congestion in the municipality of Freising in Bavaria from the end of 2021. Its construction was challenging but could be completed safely and...
The research facilities of the European Organisation for Nuclear Research, CERN, currently extend at the foot of Lake Geneva on Swiss and French territory. With a length of 27 km, CERN operates the...
Two acrylate gels by TPH Bausysteme, adapted to the properties of the respective ground areas, were used for the rammed spile pre-support in the NATM excavation section of the Bavarian road tunnel...
On 31 July 2021, Roy Forbes, long-time translator of the trade journal tunnel, died – after a long illness, but nevertheless surprisingly. He never ceased to be enthusiastic about the many different subject areas of tunnelling, and even at the age of 78, forced to take a break from work due to illness, he was looking forward to “translating for tunnel again soon”. The tunnel staff mourns the loss of a colleague from the very beginning. A decades-long excellent cooperation connects us with Roy Forbes. Excellent because it was not only professionally successful but also fun for all of us. We miss him very much.
Prysmian Group as worldwide cable manufacturer #1 has developed extensive know-how over many years regarding the special operational conditions of mining cables. The experience we gain every day – in...
Barriers provide an ever-increasing role in traffic management. The well-established Osnabrück company RAWIE is one of the leading providers of innovative security solutions. RAWIE offers a wide range...
Sprayed concrete construction in double-shell lining is a CO2-intensive construction method for tunnel structures. This article explains the ecological impact of concrete in underground construction and provides options for using this material responsibly and in a climate-friendly way – particularly in terms of planning and concrete technology.
The research facilities of the European Organisation for Nuclear Research, CERN, currently extend at the foot of Lake Geneva on Swiss and French territory. With a length of 27 km, CERN operates the...
The first part of this article was published in the 3/2021 issue of tunnel [15]. There, the authors present the AJRM method. The rock mechanical model is explained. With the aid of case studies, the advantages of a realistic simulation of the behavior of jointed rock as well as of the interaction of rock mass and structure are illustrated. As announced, part 2 of the article deals with the rock hydraulic model and related case studies as well as with the determination of the required parameters. Thus, an overall method for a safe and economic design of structures as well as for groundwater modeling in jointed rock is available.
