Journal Geomechanics and Tunnelling 4/21 published

Cover picture:

The new Nikachhu hydropower station in Bhutan has an installed capacity of 118 MW and is supplied with 25.45 m³/s via a 12,144 m long, 4 m diameter head race tunnel. Extensive tunnelling works were required for the project. In addition to a diversion tunnel, two adits were built near the dam to be able to access the desilting chambers. Five additional adits had to be built for the head race tunnel, and three adits, a ventilation tunnel, and a main access tunnel were required in the powerhouse. DSI Underground supplied Mai groutmixing pumps and DSI Hollow Bar Spiles type R32 and T76 for this tunnel project. (photo: DSI Underground)

Table of Contents Journal Geomechanics and Tunnelling 4/2021

• Developments in fibre reinforced concrete in tunnelling
• Design of the Crossrail tunnels in UK
• Fibre reinforced tunnel linings at Metro Doha – Green Line
• Structural design of segmental lining reinforced by steel fibres
• Advanced design of cavern intersections without bar reinforcement
• Experience with use of steel fibre concrete at Aluba Tunnel II
• Optimized reinforcement in longitudinal joints of segmental linings
• Material characteristics and compactability of phyllitic spoil