Alun has a broad experience of many types of tunnelling methods from immersed tubes to segmental linings, from closed face TBMs to hand excavation under compressed air. He has a specialism in sprayed concrete lined (SCL/NATM) tunnels and numerical modelling, using a wide range of calculation programs. With a reputation for innovation, he has been involved in promoting sustainability in tunnelling, the use of permanent sprayed concrete, fibre reinforcement and spray-applied waterproof membranes. Since graduating from Cambridge University, over the last 25 years, he has been involved in many of the recent major UK tunnelling projects such as the Jubilee Line Extension, Heathrow Express, Terminal 5, Crossrail and the Lower Thames Crossing, as well as working on design and construction of tunnels internationally. Notably he has worked in Denmark, Russia, USA, Iceland, Hungary, Singapore, India, Norway and Hong Kong.
Alun has given lectures at the British Tunnelling Society course, Leeds University, the Budapest Technical University and the Danish Technical University. He will launch an online course on tunnelling in September via Ingeoexpert. A regular contributor to magazines and conferences with more than 50 publications, he has written articles on subjects ranging from geotechnical monitoring to user-friendly contracts. A second edition of his book, “Sprayed concrete lined tunnels”, is in production in addition to the Chinese and Turkish versions of the first edition. Alun is Vice Animateur of the ITA’s Working Group 12 on Sprayed Concrete and was chairman of ITAtech’s activity group for Fibre Reinforced Concrete Precast Segments.