Evening Meetings 2004

The BTS has a membership of almost 700 individual and over 60 corporate members. It is one of the most vibrant gatherings of professional tunnellers in the world.


A86 West Project, Paris


Arnaud Verdier, Vinci; Pierre Boutigny, Vinci; Bill Welburn, Vinci; Dr Martin Herrenknecht, Herrenknecht AG

BTS/ MinSouth joint presentation - Cliffe Hill Tunnel, Leicestershire


Colin Cook, Butterley Mining Ltd; Rob Farnfield, Exchem Explosives Ltd; Lewis Meyer, Rock Mech Tech Ltd

A Swiss Tunnelling Experience

A presentation on the construction of the Steg/Raron section of the Lotschberg Tunnel through the Swiss Alps


David Darcy, Balfour Beatty Major Projects; Will Gmur, Balfour Beatty Switzerland

Sir Harold Harding Memorial Lecture

Sir Alan Muir Wood will address the uncertainty in tunnelling, describing strategy and techniques, some of these in the future, for its control. Sir Alan is one of the few practising engineers that knew Sir Harold Harding and his lecture can be expected to be both an historic link with his tunnelling experiences and his projections of the future for the industry. Sir Alan has been a consultant for almost 50 years. He is a world-renowned expert in tunnels. He followed Sir Harold Harding as Chairman of BTS in 1973 –1974. He was the inaugural President, and is now Honorary Life President, of the International Tunnelling Association, the ITA. He has been responsible for many major projects around the world and has been an author of books and many technical papers.


Sir Alan Muir Wood

Annual General Meeting followed by Chipping Sodbury Tunnel Flooding

Open to rail traffic in 1902 Chipping Sodbury Tunnel has suffered vary degrees of flooding over the last 100 years. Constructed through a major Cotswold aquifer the tunnel cuts through major water conduits and springs that react in varying degrees to rainfall, with as much as 2.5 cumecs of water inflow being recorded at one known ‘Spring’ point in the tunnel. Flooding in the tunnel means diverted trains and disruption to already busy alternative routes. The complicated geology and hydrogeology, the importance of the railway line, the difficulty of access and the ecological and environmental considerations of the area, all acted to constrain the possible understanding of why the tunnel floods and what could be done to solve the problem. This paper describes an unusual approach to understanding the problem and describes some of the possible solutions that have been identified.


David Mather, NR; Jack Knight, Haswell; Rania Gideon, Haswell; Bill Burton, Haswell

Geotechnical Aspects of the Dublin Port Tunnel

The 5.6 kilometre long Dublin Port Tunnel scheme has been under construction since May 2001 and is the largest infrastructure project under construction in Ireland. The works are predominantly in Black Boulder Clay and Carboniferous Limestone which is overlain by Made Ground and Marine Deposits in the southern section of the scheme. The central 2.7 kilometre section is being constructed using eleven metre diameter Tunnel Boring Machines. The remaining lengths are being built as cut and cover tunnel or at grade. The presentation deals with the geotechnical aspects of design and construction outside the main bored tunnel section, including the cut and cover sections in diaphragm walling and soil nailed slopes, the crossing beneath the Dublin to Dundalk railway line, and the construction of the surface sections on Made Ground.


Tim Brick, Dublin City Council; Paul Nowak, Kellogg, Brown & Root; Chris Menkiti, Geotechnical Consulting Group

Tunnel Lining Design Guide

The Tunnel Lining Design Guide was drafted by the BTS and is intended to cover the design of structural linings for all manner of driven tunnels and shafts to be constructed in most types of ground conditions. The guide is primarily intended to provide those determining the required specification of tunnel linings with a single reference as to the recommended rules and practices to apply in their design. In addition it provides those procuring, operating, or maintaining tunnels, or those seeking to acquire data for use in their design, with details of those factors which influence correct design such as end use, construction practice, and environmental influences.


Chris Smith, CRS Engineering Consultants; John Anderson, John Anderson Consulting; Peter Jewel, Kellogg Brown & Root; Alun Thomas, Mott MacDonald; John Curtis, Consultant, Mott MacDonald; Steve Macklin, Arup; Barry New; Geotechnical Consulting Group

Uetliberg Tunnel

The Uetliberg Tunnel Project in Switzerland is the key element of Zurich's west bypass project, which is of great national and international importance. The Project costs are about CHF 1.12 billion and is due to open in 2008 This project comprises two parallel tubes, each 4.4km long with pedestrian cross passages every 300m and vehicular crossovers every 900m. The Uetliberg Tunnel passes under two parallel ranges of hills, Ettenberg and Uetliberg and a valley divides the Uetliberg Tunnel into two independent tunnel sections during construction (Eichholz Tunnel L=710m and Uetliberg Tunnel L=3,450m). The 14.70m wide by 12.70m high horseshoe cross-section soft ground sections will be excavated with the core method of tunnel construction. The Eichholz rock molasse section will be excavated by blasting in three stages: crown, bench and invert. Through the Uetliberg molasse section a 5.00m pilot tunnel will be excavated with a tunnel boring machine and then enlarged to the final cross-section of 14.20m wide by 14.40m high by a tunnel bore extender (TBE) employing undercutting. The TBE started extending the pilot tunnel bore of the first tube in April 2003. Its progress over the first 1,600m showed that the undercutting principle works well. An interesting comparison between the mechanical TBE heading in one tube and the drill and blast heading in the parallel tube can be presented on this project.


Stefan Maurhofer, Amberg Eng Ltd; Michael Glättli, Amberg Eng Ltd; Josef Bolliger, Uetli Joint Venture

Grouts and Grouting for Tunnel Leak Sealing and Waterproofing

Martin Smith and Phil Richardson will describe the range of resin grout materials and natural cement products available from their respective companies. Peter Town will describe their use for leak sealing and tunnel waterproofing


Martin Smith, Rascor; Phil Richardson, Natural Cements; Peter Town, Oxford Hydrotechnics

Strood & Higham Rail Tunnel Lining Project

Over the last 12 months Network Rail has refurbished the Strood and Higham rail tunnels. The project was split into two halves, the lining of the unlined sections of the tunnels and completed track renewal. The presentation covers the main elements of the tunnel lining operation: the clients perspective; the lining design; and construction methodology


Simon Fricker, Halcrow; John Russell, Costain; Andy Evans, Amalgamated Construction