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WBI-Print 23

Lectures given at the 6th Rock Mechanics and Tunnelling Day 2021 in the Rosengarten, 10.06.2021, Mannheim.

This publication is only available in German.

SKU: WBI-Print 23 Category:

Rock mechanics issues in the Stuttgart – Ulm rail project and other national and international projects


Volume 23 of the publication series contains the presentations given at the 6th Rock Mechanics and Tunneling Day on June 10, 2021 in the Rosengarten in Mannheim. The large number of participants has once again shown us that the event has now found its place among experts.

Unfortunately, the Rock Mechanics and Tunnelling Day had to be canceled in 2020 due to the coronavirus pandemic. In June 2021, the opportunities to hold face-to-face events were also very limited. However, we managed to hold the Rock Mechanics and Tunnelling Day 2021 as a hybrid event. Around 100 participants were able to attend in person at the Rosengarten in Mannheim. More than 100 other colleagues and some speakers also took part in the event via video.

The presentations were again of high quality. Unfortunately, the manuscripts were received with a long delay, meaning that the proceedings can only be published after a one-year delay.

The lecture by Jens Bergmann provides an interesting overview of the tunnel projects planned by DB Netz.

The lecture on the major Stuttgart 21 project are a focal point of this issue.

Manfred Leger explains the status of the planning and construction work on the project. We owe Mr. Leger our thanks and appreciation for the many years of cooperation and the promotion of the conference.

In a highly recommended lecture, Olaf Drescher describes the work to be carried out from the completion of the shell to the commissioning of the railroad equipment for the Stuttgart junction.

André Reinhardt and Martin Wittke report on the excavation of the last tunnel of the project to Obertürkheim. A particular challenge here is driving under the Bruckwiesenweg bridge, which is founded on large bored piles.

The article by the authors Robert Berghorn, Patricia Wittke-Gattermann and Axel Hillebrenner on the connection between Stuttgart Airport and the new Stuttgart-Ulm line is also very interesting.

We would like to emphasize the technically demanding presentation by Andreas Rath, Günther Osthoff, Patricia Wittke-Gattermann and Ralf Druffel on the approach to the Hbf. Süd in full excavation. Martin Wittke, Dieter Schmitt and André Reinhardt report on the successful completion of the anhydrite injections for the tunnel sections located in the unleached gypsum keuper. It is shown that extremely low water permeabilities could be achieved with the injections carried out. The authors Walter Wittke and Martin Herrenknecht have presented an interesting publication on the bonding potential of variable-solid claystones for mechanized tunnelling.

The reports by Kai Kruschinski-Wüst and Jörg Rainer Müller provide an insight into the major project of the 2nd main line of the Munich S-Bahn. These highly interesting publications are supplemented by a report on the construction of the Marienhof stop by Michael Müller and Jens Classen from the companies carrying out the work.

The issue concludes with an essay by Erwin Scherer, Alexander Heim and Alexandre Khatchadourian on lines 15, 16 and 17 of the Grand Paris Express.

Readers should not forget to take a look at the article by Christian Moormann, Patrick Buhmann and Gero Marzahn, which uses examples to illustrate the possibilities of geothermal energy in tunnel construction.

We are looking forward to the 7th Rock Mechanics and Tunneling Day, which will once again take place on 23.06.2022 as a face-to-face event in the usual setting at the WBI Center in Weinheim. The program is again very demanding. We are looking forward to the presentations and expect a large number of participants.


Walter Wittke Martin Wittke Bettina Wittke-Schmitt Patricia Wittke-Gattermann