Evening Meetings 2013

The BTS holds monthly evening meetings at the Institution of Civil Engineers (ICE) (unless otherwise stated) from September to June, generally on the third Thursday of the month. Additional meetings are arranged by the BTS Young Members.


Design and construction of a novel inner lining system for a road tunnel in Stockholm, Sweden

Lot NL 35 of the Norra Lanken project in Stockholm comprises the construction of approximately 2.6km of tunnels in hard rock. The primary function of the inner lining is to protect the traffic against ice, dripping water and fire. Additionally it provides the facing of the tunnels traffic space. The presentation to the BTS will include a report about the experiences gained with the new system during design and construction and provide information about the particular details of this structure. Furthermore, the geotechnical features of the project and the experience from the tunnel heading and excavation works will be presented.


Dipl.-Ing Andreas Raedle, Hochtief Solutions AG; Dipl.-Ing Joerg Steppuhn, JV H.O.T. Hochtief / Oden / Tunneling; Lena Backe, Project Director, Trafikverket

The role of Operations in Crossrail

The role of the project Operations team is to ensure the operability, maintainability and safety of the new crossrail transportation system. This includes its integration into the wider London Underground and suburban rail infrastructure through addressing operational interfaces with stations, train services, signalling systems and command & control centres. The new tunnels, now under construction, will be fitted out with a rance of systems whose specification, design and integration will be vital to the operability of Crossrail. The presentation will provide a brief overview of the Crossrail project and describe some of the functions and methods of the Operations team, in support of the project delivery teams, to achieve compliant designs, systems integration and operational readiness. Particular challenges will be described and illustrated by project designs and construction photographs.


Simon Pugh, Route Control Centre Manager, Crossrail

Crossrail - Innovation in the monitoring of underground infrastructure

Crossrail Limited and Cambridge University are undertaking a collaborative research programme, supported by the Knowledge Transfer Partnership, to improve the understanding of ground movement mechanisms around deep excavations and the stresses induced in shaft linings. The research provides a review of existing geotechnical instrumentation and explores the application of innovative sensing technology (such as optical fibre and wireless mesh sensors) at several Crossrail sites: Limmo Peninsula shaft, Stepney Green step-plate junction, Pudding Mill Lane portal, Paddington Station main box and Liverpool Street sprayed-concrete lined cross-passage.


Mohamad Alsadere, Crossrail Ltd; Masanare Nakashima, University of Cambridge; Seda Torisu, Crossrail Ltd

Tottenham Court Road Upgrade - Central Line Overbridges - An innovative use of sprayed concrete technology

Building on the review and recommendations put forward in the recent State of the Nation – ICE’s flagship transport policy report – the Institution is enabling a timely and much needed look at network integration, with a focus on the need for long term strategy development.


BTSYM: An Introduction to Engineers' Professional Indemnity Insurance

Professional Indemnity (PI) Insurance should be the priority for any business wishing to transfer the risk of claims made by a client (or third party) who are suggesting they have suffered a loss as a result of non-performance, breach of contract and/or professional negligence in the services provided. Essentially, PI Insurance provides the safety net when all else fails and means that the risk of unexpected financial losses as a result of professional negligence or lack of reasonable skill and care will be taken on by the insurance company.


Steve Dando, Insurance Broker; Howden Windsor, Insurance Broker

Tunnel Operator's Forum

At the IMechEng


Harding Prize Competition

The biennial Harding Prize competition is named in honour of Sir Harold Harding, the founder Chairman of the BTS and is open to young engineers aged 33 or under at the end of 2012. Entrants must submit an original paper relating to any aspect of tunnelling which they consider of interest to the tunnelling industry, with the winning paper selected by the BTS Committee. Further details can be found on the BTS website as noted below. The closing date for entries for this year’s competition is 28th February 2013. The winner of the Harding Prize receives two tickets to the BTS Annual Dinner, a copy of Sir Harold’s book Tunnelling History and My Own Involvement, a cheque for £500 and other prizes. Runners up receive a cheque for £100 and other entrants submitting papers of an acceptable standard receive a cheque for £50.


The shortlisted Harding Prize entrants

Ribble Estuary and Coastal Water Environmental Improvement Scheme, Preston

The project, a complex £114m sewer improvement scheme within the City centre of Preston and within the environmentally sensitive River Ribble corridor, involved the construction of a 6km of tunnel in a densely populated urban environment and included three tunnelled river crossings. KMI Water commenced in February 2010 and all went well until August 2010 when two failures occurred. The first, a 30m deep shaft, two thirds complete, suddenly found water and silt flowing into its base. A second larger 35m deep shaft, just 10m away, then flooded in similar circumstances. Elsewhere at the River Ribble tunnel crossing with 70m complete, water and silt inundated the sewer tunnel and trapped the full face tunnelling machine. The presentation will highlight the challenges faced and the solutions implemented which include one of the most complex grouting and dewatering systems ever installed, plus a German pipe thrusting technique, new to the UK, but which proved fast and cost effective.


Carl Sanders, United Utilities; Andrew Parker, Adrian Owens, KMI Water; Stewart Tennant, GHA Livigunn; Donald Cook, Donaldson Associates

BTSYM: Immersed Tube Tunnels – A Different Way of Tunnelling

The immersed tunnelling method has some unique aspects to it and some particular circumstances where it is a highly favourable solution to crossing a waterway. The method of construction combines conventional subsurface construction techniques with offshore marine technology. This talk will explain the immersed tube construction method to those who have not come across it before and it will look at how the technology is developing. In particular it will show how environmental issues are being tackled, how construction in deeper offshore environments is being managed and touch on the age-old debate of whether to build in steel or concrete, using examples from projects around the world.


Jonathan Baber, Mott MacDonald

Gotthard Base Tunnel - Construction of the World's Longest Railway Tunnel - Logistical Challenges from Launch to Breakthrough

After 10 years of tunnelling, the two main breakthroughs were celebrated on 15 October 2010 in the eastern running tunnel and on 23 March 2011 in the western running tunnel, completing the two main tunnels of the 27 km Bodio and Faido section.


Rainer Rengshausen, Hochtief

Thames Tideway Tunnels - Project Update

The Thames Tideway Tunnel is the largest privately financed project in Europe. The 'Supersewer' is urgently needed to help tackle the 39 million tonnes of sewage that is discharged into the tidal River Thames in an average year. After over two years of public consultation on Thames Water's proposals, the development consent application was submitted to the Planning Inspectorate on 28 February 2013. The presentation will include: a short background on the problem of sewage discharges to the river and the proposed solution; an update on the project development and design for tender; progress on the development consent application; an outline of the technical challenges faced; the proposed delivery route for the construction; and the latest situation on procurement.


Phil Stride, Thames Water

BTSYM: Hidden Shafts - Investigations into Victorian Railway Tunnels across the UK

Network Rail identified a legacy of risk due to the existence of hidden shafts abandoned following tunnel construction some 150 years ago. There was little knowledge of the location, construction or subsequent infill material. This talk will explain the Victorian Masonry Railway Tunnels construction methods and give some background to the rich railway development of Great Britain in the XIX Century. The main focus will then be given to the desk study research and the intrusive, and non-intrusive, site works used to identify the existence and location of hidden shafts. The presentation will discuss the optimisation of risk management associated with the hidden shafts legacy, and the ranking matrix which was used to prioritise shafts to target remediation works.


Michael Kowalski

London Underground at 150 years - a journey through the past, present and future

The presentation will take place at the QEII Conference Centre, Westminster, on Wednesday 23rd October 2013 at 6 pm. The London Underground, the world's oldest metro system, is celebrating 150 years of continuous operation, and today is experiencing unprecedented growth in demand. The presentation will trace the development of the railway's tunnel infrastructure from its earliest beginnings almost two centuries ago when London was a very different place. It will include an overview with illustrations of the network's development, and the tunnelling technologies that were developed and applied at different times. The presenters will then move on to consider the future of the network, and will conclude by exploring some of the factors that they anticipate are likely to influence the long-term development of a sustainable underground railway.


Dr Keith Bowers and Tim Morrison, London Underground

Port Mann Tunnel - Precautions and Contingencies for a high pressure EPB tunnel under the Fraser River

The project is currently under construction and involves transfer under pressure compressed air working.


Steve Skelhorn, McNally Construction Inc

BTSYM AGM and talk - Sprayed Concrete Lined (SCL) Tunnels - Design Details and Case Studies

Dr Sauer & Partners provide specialist tunnel design and supervision services worldwide including input to numerous current projects in London. This presentation provides an overview of state-of-the-art processes and details for SCL construction through review of recent projects. In addition to general principles being presented, specific issues including use of fibres, joints, junctions and key constructability issues will be explored. Future developments in SCL design and construction will also be reviewed.


Gerald Skalla and Brian Lyons, Dr Sauer & Partners

National Grid Cable Tunnels

The project comprises the design, construction and commissioning of 32km of bored tunnels, 14 associated shafts, a number of connection chamber enlargements, adits, cable trenches and risers. Once completed, the tunnels are fitted with a monorail and cable brackets for installation of two 400kV circuits and up to three 132kV circuits between Islington and Eade Road substations. The presentation will provide an overview of the business case for the project and detail the progress made since the start on site in 2011. It will explain the obstacles faced and how these have been overcome while detailing implementation of novel practices. Finally, the team will explain what is left to achieve, how the project fits into the wider programme of works and the future opportunities for cable tunnels.


Andrew Firth, Costain; and John Trounson, National Grid

Meetings will be held at the ICE and will start at 6.00pm and finish at 7.30pm, unless otherwise stated. Tea and biscuits will be available in the ICE Brasserie from 5.30pm. A licensed bar will be open and a variety of foods will be served in the ICE Brasserie after each meeting held at the ICE. Advance booking is not required, and you do not need to be a member of the BTS to attend. The above list may be subject to changes - the website will be updated with any changes as promptly as possible. Details of each meeting will be sent to members with their monthly copies of T&TI. Should you have any queries, please contact the BTS Secretary via the contact page.