| CONTENTS


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Rock tunnelling underway on Forbach hydro project, Germany Image credit: Porr Tunnelbau


Comment 3 REGULARS 6 News 42 Events


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Rock tunnelling Forbach hydro A variety of rock excavation works are underway for tunnels, caverns and shafts to expand and modernise the Forbach hydro complex, in Germany.


Rock class systems G.H. Erharter, N. Bar, T.F. Hansen, S.Jain & T. Marcher


A major review of rock mass classification systems across the world, for above and below ground, has created a ‘family tree’ of their evolution and relationships, and a pie-chart world map of relative uses of each system.


BTSYM


Workshop report V. Casas, B. Vanheuverzwijn & J. Xu Concrete design training for tunnel lining, with focus on how steel fibres can be used and low carbon production achieved.


Insight


Women in Tunnelling R. Diez, A. V. Serín & T. Khanom Key perspectives from a range of contributors consider past challenges for women to work underground but also changes that have been underway and future opportunities to build careers in teams developing tunnel projects.


Market focus: Middle East C Foreman, Y. Iqbal


Tunnel projects in construction and planning in the Middle East, as reported by MEED, a sister publication of T&TI. Much focus is on transport although sewerage systems are key, too..


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