Latest from Tunnels and Tunnelling


HS2 Warwickshire site now ready for TBM launch
26 February, 2021 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.
  • 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.


Drill and blast tunneling
25 February, 2021 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
  • Tight Manoeuvres
    Academia and site-based investigations are being combined in Norway to advance our understanding and performance of high-pressure grouting. Patrick Reynolds reports