A convertible Herrenknecht multi-mode tunnel boring machine (Ø 9,890 mm) was used to modernize the Czech railway line between Rokycany and Pilsen. The machine excavated two tunnels, each about 4 km...
An extensive subway network is being built in Doha, Qatar. Part of this network is the so-called Green Line, for which also a number of underground street crossings had to be constructed. Originally, it was planned to carry out construction of these underpasses by means of the cut and cover method. Following a proposal of the contractors, three underpasses were, however, constructed by the mining method. Design and construction were executed on the basis of the AJRM-Method.
On September 18, 2018, ASFINAG (Austrian Motorway Authority) heralded in the complete further development of the Karawanken Tunnel with the ground-breaking ceremony on the A 11 Karawanken motorway. Thanks to this new structure cofinanced by the EU, the two-way section on the important north-south link between Austria and Slovenia will soon be a thing of the past. During the course of the next five years therefore, the second, almost 8 km long tube will be excavated from both sides.
SYTRAL, the transport association for Rhône Department and Lyon, has commissioned Implenia (lead-manager) and Demathieu Bard to build Lot GC 01 of the Métro Line B extension in Lyon. Each company has...
With effect from 1 June, Friedrich Hirtler has been appointed Managing Director of Sandvik Mining and Construction Central Europe GmbH, having taken over this demanding management role on an acting...
One year after the incident of 12 August 2017, works are proceeding at the Rastatt Tunnel. The removal of the concrete plug in the east bore has been completed and the detailed investigation program was finished in September 2018. The evidence gathering and arbitration process agreed between the consortium Tunnel Rastatt (Hochtief and Züblin) and Deutsche Bahn to clarify the causes of the damage during tunnel driving will last until the start of 2019.
The next World Tunnel Congress will be held in Naples from 3rd to 9th May 2019. The conference A key event for the engineering and geotechnical sectors linked to tunnelling, promoted by the International Tunnelling and Underground Space Association (ITA-AITES) and Società Italiana Gallerie (SIG). This WTC will be characterized by a distinctive and unique perspective due to the inclusion of themes suggested by the city of Naples and its context, and more generally by the Italian background.
Until now, normal untreated hardboard has been used as load distribution boards. For the purpose of rationalisation, these boards are mostly glued on immediately after segment production. Then the...
In future, the road tunnel beneath the Suez Canal to the south of the city of Port Said in northern Egypt will link the Lower Egyptian mainland with the Sinai Peninsula. The tunnel project is part of the Egyptian government’s plan for the economic development of the Suez Canal region presented in 2014. Towards this end, President Abdel Fattah el-Sisi’s government is concentrating on international trade and building up the cities of Suez, Ismailia and Port Said. By constructing the road tunnel, the ongoing substantial delays resulting from having to cope with heavy-duty and passenger traffic on ferries are to be alleviated. This article deals with the construction of the two roughly 2.9 km long tunnel tubes with an external diameter of 12,60 m, in the proximity of Port Said under somewhat out of the ordinary circumstances.
The 3.25 km long Gubrist Tunnel on the Zurich North Bypass (A1) is a neuralgic infrastructure on the Swiss motorway network. As a reaction to the permanent congestion in the twin tunnel that was commissioned in 1985, a third tube as well as ventilation and operating centres are being built. The article in tunnel 5/2018 explains the project’s characteristics and challenges with particular attention being paid to BIM modelling of the underground operating centre.
