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After more than 60 years of use, refurbishment of the road tunnel between Neuhaus and Spitzingsee bei Schliersee, Germany, was urgently necessary. The waterproofing directly behind the shotcrete inner...

Reducing the time it takes to get between destinations within the metropolitan region while increasing the rail transport capacity – the Danish capital Copenhagen is currently expanding its metro...

Start of Tunnelling Works at South Exploratory Tunnel On 29 March 2019 tunnelling work for the fourth drilling of Lot H51 Pfons–Brenner began on the south exploratory tunnel, marked by a drilling...

Cities are facing more challenges than ever before as growing populations put stress on transportation systems, social services, energy infrastructures and other vital aspects of daily life. If...

Excavation of Turkey’s longest water tunnel came to an end in December 2018. To get there, a 5.56 m diameter Robbins Crossover (XRE) TBM and the contractor JV of Kolin/Limak had to overcome dozens of...

The final double breakthrough of the two Herrenknecht tunnel boring machines „Anna“ and „Magda“ (Double Shield TBM, Ø 9,900 mm) in the Norwegian Ski completed the excavation of both 20-kilometer-long...

Special regulations have to be observed with regard to safe railway operation while carrying out work such as pipe-jacking or tunnelling under railway tracks. Towards this end, what is known as safetoring must be undertaken by means of a suitable measuring system and method. Safetoring is (deformation) monitoring with directly coupled measurement data evaluation so that the existing track position and the availability of the infrastructure can be assessed at any time, thus enabling direct intervention in the railway and construction activities should the limit or alarm values be exceeded.