About the Author
o. Prof. em. Dr.-Ing. Dr. h. c. mult. Bernhard Maidl was chair of construction method technology, tunnelling and construction management at the Ruhr-Universitat Bochum. Currently, Prof. Maidl is partner at MTC - Maidl Tunnelconsultants GmbH & Co. KG, Duisburg.
Dr. Martin Herrenknecht is CEO of Herrenknecht AG, Schwanau. The company is technology and market leader in mechanised tunnelling. It is the only company in the world that offers the state-of-the-art tunnelling equipment for all soil types and in all diameters. Dr. Herrenknecht founded the company in 1977.
Dr. Ulrich Maidl is general manager of MTC - Maidl Tunnelconsultants GmbH & Co. KG, Duisburg and is a publically appointed and accredited expert for tunnelling and micro-tunnelling.
Dr. Gerhard Wehrmeyer heads the Traffic Tunnelling division of Herrenknecht AG.