NAT goes to San Francisco

Two-component backfill grouting on Rome’s Line C
Four EPBMs are being used to excavate Rome’s Metro Line C Project under the city’s historic buildings, streets and monuments. A two-component backfilling system is being employed on the project to perfectly fill the annular space behind the concrete segments and minimise the superficial subsidence. Enrico dal Negro, Alessandro Boscaro and Richard Schulkins of the Mapei underground technology team and Gianluca Gulino of the Metro C mechanised tunnelling department give this paper

Work, rocks ‘n’ rollercosters

Segment fibre reinforcement in Barcelona
Bernard Berge, product specialist engineer of the Maccaferri fibre division examines the successful use of fibre-reinforced concrete in tunnel lining segments used in the construction of Barcelona’s impressive new metro system

Short Term Rail Consultant
Location: Thailand

Senior Tunnelling Engineer
Location: Hong Kong