Journal Geomechanics and Tunnelling 2/21 published

Cover picture:

From the excavation pit of the future Sydney Metro Pitt Street station, a connecting tunnel had to be constructed underneath a busy road. To secure the station box wall, the AT – Pipe Umbrella System was used, which was installed at a 19° downwards. In close cooperation with the drilling equipment specialist Robodrill, DSI Underground has developed a successful concept for the installation of the AT – Pipe Umbrella System consisting of 60 individual pipes with a length of 18 meters each. For this project, DSI Underground’s pro­prietary squeezed connection for pipe umbrella pipes has been used as a replacement for a conventio nal threaded connection. (photo: DSI Underground)

Table of Contents Journal Geomechanics and Tunnelling 2/2021

• Description of rock mass as subsoil for dams and hydropower plants
• Exceptional tasks for grounting technology in power plant construction
• Safety aspects of a water reservoir influenced by a creep like landslide
• HPP Kirchbichl in Tyrol – Challenges to the construction pit
• Rodundwerk I – Concept and realization of the new pressure shaft
• Lower Kaleköy Dam – A tailor made composite dam structure