Latest from Tunnels and Tunnelling
A National Grid project to push a 5km pipeline under an estuary of global importance to wildlife has resulted in the world’s longest pipeline river crossing in a tunnel, safeguarding the UK’s gas supply for a century and earning a place in Guinness World Records. Julian Champkin reportsRead more
Completion of site excavation at HS2’s north portal at Long Itchington Wood Tunnel, Warwickshire means the site is ready for the launch of the tunnel boring machine (TBM).
Time running out to enter ICE London Awards
London’s premier showcase for engineering excellence in the capital, the ICE London Civil Engineering Awards will soon close for entries as the deadline of 1 March fast approaches.
Normet upgrades TBM soil conditioners
Equipment, chemical and rock-reinforcement specialist Normet says it has introduced an upgraded range of soil conditioning technologies in a bid to optimise its TBM offering.
Brenner BT research may improve tunnel sustainability
Drainage water from the Brenner Base Tunnel (BBT) could be used to supply sustainable energy to residential districts.
BTS unveils a new website
To complement its 50th anniversary celebrations, the British Tunnelling Society (BTS) has launched a new website to reflect the growing diversity of knowledge and services which it offers to BTS members and others interested in tunnelling.
A form of blasting dating from the pre-explosive’s era involved excavating tunnels by lighting fires at the face and throwing cold water on the hot surface to crack the rock. Later on, blasting with black powder was invented and since then, there have been steady developments in explosives, detonating and delaying techniques, and in our understanding of the mechanics of rock breakage by explosives.
Laser scanning covers the points
Laser scanning and 3D virtual modelling were critical tools in the refurbishment of a deep shaft on London’s Thames Water Ring Main, resulting in a better foundation for future repair and maintenance. Julian Champkin reports
Lord of the rings
A new ring-build system is said to offer health and safety gains, but also cuts ring completion times by around a third - bringing significant cost savings. George Demetri reports
A service limit state design approach for SFRC tunnel linings
Sotiris Psomas, Director of Tunnel Structures at Cowie UK, looks at how to estimate mean crack-width for ‘strain-softening’ SFRCs which are usually adopted in tunnel- and shaft-lining applications
Academia and site-based investigations are being combined in Norway to advance our understanding and performance of high-pressure grouting. Patrick Reynolds reports