Journal Geomechanics and Tunnelling 3/2020 published

Cover picture:

The Tren Interurbano rail connection between Toluca and Mexico City includes a 4.7 km long twin-bore tunnel, which was driven by two multi- mode TBMs in heterogeneous geology. During construction of a cross passage between the two parallel tubes, water broke in several times. The section could finally be supported using a combined polyurethane and silicate resin grouting system to fill cavities and seal against water pressure (photo: DSI Underground)

Table of Contents Journal Geomechanics and Tunnelling 3/2020

• Characterization and evaluation of scale deposit features
• Sulphate bearing rocks in runnels
• Experiences from 14 km dry tunnel drive
• Unit rate determination of labour-intensive tunnelling processes
• Test methods for tool wear in quality control of railway ballast