In Munich‘s premium city centre location, an eye-catching structure visible from afar is attracting attention: two construction cranes with heights of up to 75 m, often colourfully illuminated at night, have been marking the construction site for Germany‘s deepest S-Bahn station since January 2021...

One of the highlights of the InnoTrans Convention in 2022 will once again be the International Tunnel Forum, organised by STUVA e. V. The Forum accompanies the Tunnel Construction segment of the trade fair and, with its various internationally staffed and compact discussion forums, is a must for industry insiders at InnoTrans.

Climate protection and the geopolitical situation pose major challenges for our society. To protect the climate, we must reduce CO2 emissions and cut the consumption of fossil energies. The war in Ukraine makes us very aware of our economy‘s dependence on fossil energies and their availability and costs. This makes savings even more urgent than they already have been before. Likewise, the relevance of supply chains and availability of raw materials is becoming more and more obvious – also for the construction industry. An optimization of the design of conventional tunnels by owners and planners can lead to a significant reduction in CO2 emissions, energy and raw material requirements, and thus also in cost. In the article, potential optimizations are shown and explained with the help of examples.

The next STUVA conference, the International Forum on Tunnels and Infrastructure, originally planned for early December 2023, will take place earlier than previously planned.

For the construction of inner tunnel linings exposed to water pressure, both constructions made of waterimpermeable concrete and waterproofing with plastic sealing membranes are used. Both sealing options have in common that hose lines are led through the inner tunnel shell along a tunnel block. The article published in tunnel 3/22 examines the question of the extent to which water can flow along the longitudinal direction of the hose lines as a construction-related effect.