About the authors: The four authors work in various areas of tunneling. Bernhard Maidl has been Professor for Civil Engineering, Tunneling and Construction at the Ruhr-Universität in Bochum since 1974. In 1979 he founded the engineering firm Maidl und Maidl in Bochum, which is involved in many large and complex tunnel projects in Germany and abroad. Dr. Herrenknecht is the Founder and Chairman of the world's leading mechanized shield tunneling company. Leonhard Schmid is a planner of tunneling projects and manager of a Swiss engineering firm. Willy Ritz was formerly manager of a tunneling company in Switzerland and has a great deal of experience in the construction sector.

Die vier Autoren arbeiten alle in verschiedenen Bereichen des Tunnelbaus. Professor Maidl ist seit 1974 Ordinarius am Lehrstuhl für Bauverfahrenstechnik, Tunnelbau und Baubetrieb an der Ruhr-Universität in Bochum. 1979 gründete er das Ingenieurbüro Maidl und Maidl in Bochum, das an vielen großen und schwierigen Tunnelprojekten im In- und Ausland beteiligt ist. Herr Dr. Herrenknecht ist Firmengründer und Vorstandsvorsitzender des weltweit führenden Unternehmens für Schildvortriebsmaschinen. Herr Schmid plant Tunnelbauprojekte und leitet ein Ingenieurbüro in der Schweiz. Herr Ritz war Direktor einer Tunnelbaufirma in der Schweiz und hat umfangreiche Erfahrungen auf der Bauausführungsseite.

HISTORICAL DEVELOPMENT AND FUTURE DEMANDS
BASIC PRINCIPLES AND DEFINITIONS
Basic Principle and Procedure
Definitions and Terms
TUNNELING
Tunneling Procedure
The Cutterhead
Cutting Tools
Drive Unit
Thrust Capacity
Special Designs
THRUST
General Information
Thrust with Gripper System
Thrust with Shield-TBM
MATERIAL TRANSPORT
Material Transport in Machine Area
Material Transport through the Tunnel
EQUIPMENT OF THE BACKUP SYSTEMS
Backup System Design
Construction References
VENTILATION, DUST CONTROL, WORK SAFETY, VIBRATIONS
Ventilation
Dust Control
Industrial Safety and Safety Planning in TBM Operation
Vibrations
ADDITIONAL EQUIPMENT
Exploring and Improving of Geological Conditions
Rock Support Equipment
TBM Control
Investigation/Survey
ROCK SUPPORT
General Information
Rock Support Systems and Performance Rates
Systematic Safety in the machine area
Shotcrete Rock Support
Specific Safety
Stabilization in front of the Cutterhead
COMBINATIONS OF TBM AND SHIELD MACHINES
Roofs
Partial Shields and Cutterhead Shields
Walking Blade TBM
Full Face
Double Shields
Shields with Liquid conveyance
Shields with Snail Conveyor
Micro Machines for Hard Rock
SPECIAL PROCEEDINGS.COMBINATION OF TBM AND SHOTCRETING
Different Utilization
Procedure Options
GEOLOGICAL ANALYSES AND INFLUENCES
General Information
Influences on the Tunneling Process
Influences on the Gripper System of the Machine
Influences Rock Support
CLASSIFICATION EXCAVATION AND SUPPORT
General Information and Goals for mechanized tunneling
Classification Systems
Norms, Rules and Recommendations
Author's Recommendation for Classification
ADVERTISEMENT, BIDDING PROCESS, AWARD, CONTRACT
Examples of Procedure
Planning and Geotechnical Qualifications for the Advertisement of a Mechanized Tunneling as a Secondary Offer
LINING
General Information
Principles for Lining a Tunnel
Lining with Concrete Segments
Local Concrete
Shotcrete Segments for permanent Lining
Statistical Analysis
EXAMPLES OF COMPLETED CONSTRUCTIONS
Tunnel Operation with Gripper-TBM
Tunnel Operation with Shield-TBM
Incline Shaft Excavation with Double Shield Pressure Shaft, Cleuson-Dixence