Evening Meetings 2015

The BTS holds monthly evening meetings from September to June, generally on the third Thursday of the month. Additional meetings are arranged by the BTS Young Members. If a meeting report is available this is noted in the first line of the description.


BGA John Mitchell Lecture: Going Underground? The Past, the Present and the Future. Please note that prior booking is required for this event.

In tonight's lecture, Colin Eddie will present his own perspective on the tunnelling industry. He will start by looking at the utilisation of underground space and the development of increasingly sophisticated construction techniques. Drawing on over 35 years of experience in the tunnelling Industry, he will then examine some of the challenges encountered when tunnelling beneath urban areas before turning to the future and considering the challenges that will be faced by the upcoming major projects proposed for London and how the UK tunnelling industry can overcome them and maintain their position in a competitive international market.


Colin M Eddie FREng, Morgan Sindall

'Propless' cross passage construction at Victoria Station Upgrade

[A meeting report has been uploaded to the Knowledge section] The Victoria Station Upgrade consists of a new ticket hall and northern entrance, extension of the existing southern ticket hall, nine new escalators, eight lifts and pedestrian tunnels connecting the two ticket halls and the existing station. This presentation will focus on the innovative techniques developed to allow construction of the connections to the existing station to be implemented with minimum disruption.


Ian Heath, Tunnel Manager TWBN JV; Anmol Bedi, Senior SCL Engineer, MM; Daniel Alston, Senior Project Manager, LU

Joint BTS / Geolsoc presentation. Geological, Geotechnical and Hydrogeological aspects of the York Potash Ltd Mineral Transport System Tunnel

Note, this mee1ting will be held at Gelsoc, Burlington Hiuse. York Potash Limited (YPL) intend to build the first potash mine in the UK for over 40 years – a plan for North Yorkshire that has both local and national significance. A state-of-the-art new mine to extract polyhalite, a unique multi-nutrient form of potash, will not only safeguard UK supplies, but also boost the local, regional and UK national economies. YPL have already made significant progress towards delivering this vision. The exploration programme has confirmed that the Project area has the world’s thickest and highest grade of polyhalite and planning process is now underway for one of the world’s most innovatively designed low impact mining operations. Once the polyhalite is mined it is brought to a depth of 360m where it is loaded directly onto a conveyor belt. From the mine this travels approximately 37.5km until it rises to surface at Teesside. The conveyor belt sits in a mining tunnel which will follow a stable geological sequence that naturally comes to surface at Teesside. The talk describes the proposed mine and ground investigations carried out to date and discusses the various geological, geotechnical and hydrogeological aspects of the tunnel investigations.


Tristan Pottas, YPL; Tom Berry, Arup

Crossrail Technical Papers Competition Winners' Presentation

This is an open event at which three of the winning entries from Crossrail's 2014 Technical Papers Competition will present their papers. The Technical Papers Competition is held annually and is open to all organisations currently or previously involved in the Crossrail project, including designers, contractors, joint ventures and those working for Crossrail Ltd. Advance booking is not required. Please note this is not a BTS event.


BTSYM: Sprayed Concrete Lining in Liverpool Street and Whitechapel Stations (Crossrail) Case Study

CH2M HILL forms part of the Crossrail programme delivery partner and provides specialist tunnel design and project management services to the UK's biggest infrastructure and transport project currently under construction. This presentation provides an overview of the delivery of the SCL platform and station tunnels at Liverpool Street and Whitechapel Station (C510). Insights into the design philosophy and construction elements will be presented specific to C510 such as pile encounter in an SCL tunnel, lasershell, wraparound SCL structures, sprayed secondary linings and uphill excavation.


Gabi Hazelden, Project Field Engineer, CH2M HILL

CERN - Conceptual Design (Please note, this is a BTSYM event in Solihull)

Arup has been appointed by CERN to undertake conceptual design studies for both the tunnel engineering and geotechnical aspects in the scope of the Future Circular Collider (FCC) study. Arup has been working on the development of an early stage BIM tool to perform risk and cost optimization options for a 100km long, circular particle-accelerator tunnel. This is the first of a new series of BTSYM lectures in the midlands.


Matt Sykes, Director, Arup

Joint BTS / Min South Event: Deep Mine Shafts for Canadian Potash Projects

[A meeting report has been uploaded to the Knowledge section]The origins of the Alan Auld Company lie in the field of deep mine shaft design and the company has a long association with the specialist shaft sinking contractor Cementation. Between 1960 and 1980, the Cementation Company sank several shafts for the newly discovered potash filed in Saskatchewan, Canada and numerous other North American shafts, the Penobsquis potash mine in New Brunswick, Canada having particular relevance to this presentation. The presentation will look at some deep mine shafts and explore the next generation of potash mines currently being sunk in Canada. The design and construction of the shafts for the Piccadilly project will also be described in detail. Advanced booking is not required.


UXO – CIRIA guide and the practical application

[A meeting report has been uploaded to the Knowledge section] UXO (unexploded ordnance) can arise from both hostile and defensive military activity and is often related to World Wars I and II. This presentation looks at how UXO can pose a risk to sub-surface engineering activities and how risk can be managed and mitigated to ALARP (As Low As Reasonably Practical), in accordance with the law and using best practice.


Simon Cooke, Managing Director, 6 Alpha Associates

Harding Prize


BTSYM: The behaviours necessary to develop trust and enter into collaborative relationships

A specialist in Behavioural Management Techniques (BMT) since 2005, Bob Cummins founded the company Sodak Ltd and works with major clients to enhance their efficiency and safety through the application of behavioural science. He is the co-author of the successful book Behavioural Safety for Leaders and a frequent speaker at conferences worldwide.


Bob Cummins, Director of Sodak Ltd and Alternative Safety Ltd

BTSYM: Elan Valley Severn Trent Water Projects (Please note, this event is in Derby)


BTSYM: Large Diameter Tunnel Boring Machines - Recent Project Experience (Please note this event is in Solihull)

Christopher Bambridge spent 4 years in the States on the Alaskan Way Viaduct replacement project in Seattle where there was the world's largest TBM. He was the Washington State Technical Advisor for Tunnelling. Chris will present on the project development, procurement and design considerations for mega-TBM projects and logistics.


Christopher Bambridge, Project Director, Mott MacDonald

A BGA meeting on the Warsaw Metro Line 2 Construction: Excavation works and geotechnical challenges

The new Central section of Warsaw Metro Line 2 connects the historical 'Downtown' on the west side to the 'Praga District' on the east side and passes under the River Vistula. This presentation focuses on the solutions adopted for excavation of the station shafts and boxes and the associated geotechnical problems.


Dr. Eng. Federico Bizzi, Astaldi-Gulermak-PBDiM Metro JV; Dr. Eng. Andrea Pettinaroli, Studio Andrea Pettinaroli srl (Milan); Dr Eng. Elena Rovetto, Studio Ingegneria Balossi Restelli e Associati (Milan)

BTSYM: Groundwater Control Techniques

A presentation on the more commonly used methods of groundwater control and dewatering by pumping (sump pumping, wellpoints, deep wells ejector wells) and by exlusion (cut-off walls, grouting, artificial ground freezing).


Dr Martin Preene, Preene Groundwater Consulting

BTS AGM followed by: East Side Access Project

The evening will start with the BTS AGM and will be followed by a presentation on the $10.4bn East Side Access project in Manhattan. The focus will be on the methods used and will look in detail at the unique solutions employed to overcome challenges faced when excavating in soft ground beneath a busy, operational railway and subway.


Andy Thompson, Program Executive, Metropolitan Transport Authority

Tunnelling in the Lambeth Group – how can we make it go right?

This talk will examine why the Lambeth Group is so complex and variable; what risks and challenges it presents to tunnellers in London and how training in the stratigraphy and the development of more accurate ground models is contributing to mitigating those risks.


Dr Jackie Skipper, Senior Geologist, Associate Director, Geotechnical Consuting Group

Eurasia Tunnel: Geotechnical Challenges of the Asian Transition Box. This is a joint presentation of the BTS and the Ground Engineering Group, and will be held in Cardiff

The Eurasia Tunnel is being constructed between the Asian and European sides of Istanbul along a 14.6km route including a total 5.4km twin-deck tunnel that will cross the Bosphorus beneath the seabed, with an aim to relieve Istanbul's transcontinental traffic pressure. At its deepest point, the TBM will be 106m below sea level and endure a face-pressure of 11bars, which is the highest in the world among the mixshield TBMs. The excavation diameter is 13.7m. This talk will focus on a specific aspect of the project, the Asian Transition Box, a 40m deep excavation which marks the transition from TBM to NATM tunnelling methods and is the point where the TBM was launched from. The design of the excavation posed some significant challenges, and the geotechnical parameters of the Trakya Formation had to be recharacterised once excavation had begun.


Alexis Rose, Parsons Brinckerhoff

Innovation and technological advances in the design of segmental tunnel lining

[A meeting report has been uploaded to the Knowledge section] Over the last 40 years TBM tunnelling and segmental lining technology has seen significant changes in the technologies adopted and how it operates. This presentation aims to stimulate industry-wide discussion by sharing our views on where we are and where we collectively believe our industry is heading. The BTS does not have a link to a recording of this lecture.


Mike King, Director, CH2M; Anthony Harding, Global Technology Director, Tunnels, CH2M; Malcolm Chappell, Director, Ozengi Associates

BTSYM: Gaining development consent for an NSIP (Nationally Significant Infrastructure Project)

The Tideway Tunnel is required to update London's Victorian sewerage network. The Thames Tideway Tunnel Development Consent Order (DCO) was granted by the Government to Thames Water in September 2014 and in September 2015, a new water company (Bazalgette Tunnel Limited) was created to take the project forward. The speakers will explain the DCO process and why this planning route was used. They will also talk about how the tunnel works and about the process of selecting the 24 London construction sites.


Ian Fletcher, Planning Project Manager (Policy); Derek Arnold, West Engineering Manager

Canning Town Flyover

[A meeting report has been uploaded to the Knowledge section] The presentation will include: the background to the requirement with regard to the settlement mitigation concerning the Crossrail tunnelling; the design and structural form of the viaduct; the solution in terms of the instrumentation measurement and hydraulic control; the real time information and alerts that were available to engineers; how the movement was managed when the TBMs passed under the structure; other potential uses of the technology.


David Holland, Mabey; Kim West, Arup

BTSYM AGM and Evening Meeting: Waterproof sprayed concrete linings; how do they function?

Sprayed concrete linings waterproofed with spray-applied membranes can be a cost-effective alternative to traditional lining systems in a number of situations. The presentation will cover the main findings from a 4 year research project in Norway. The main goal was to evaluate the waterproof sprayed lining option for modern rail and road tunnels in hard rock. The presentation will describe the function of waterproof SCL system, the typical loading scenarios for hard rock, and the main material parameters for both sprayed concrete and the membrane. Implications for composite shell linings in soft ground will also be discussed.


Karl Gunnar Holter, NTU/BASF

Compressed Air Working Group Seminar at 2pm at the ICE

The BTS Compressed Air Working Group is holding a seminar on International Tunnelling Association Report No 10 - the joint ITA/BTS CAWG “Guidelines for good working practice in high pressure compressed air". Designers, clients and contractors involved in forthcoming UK projects for which HPCA might be an option are invited to attend. The seminar will consist of a presentation on HPCA and the hyperbaric concepts involved, gas properties and mixtures, plant and equipment; modelling and monitoring; UK statutory requirements. This will be followed by an open discussion with members of CAWG present to provide further expert input and opinion. The seminar will be held in the Godfrey Mitchell Theatre of the Institution of Civil Engineers Places may be limited, if you wish to attend please email: bts@ice.org.uk or Greg.James@ice.org.uk


The Abu Dhabi Strategic Tunnel Enhancement Project (STEP)

[A meeting report has been uploaded to the Knowledge section] The Strategic Tunnel Enhancement Project (STEP) consists of 45km of gravity sewer and 43km of link sewers taking sewerage flows out of the city of Abu Dhabi to a major new treatment plant outside Abu Dhabi. The main gravity sewer has a finished diameter of 6m and accommodates average sewerage flows of up to 29m3/s. The talk focuses on the challenges of designing and constructing the deep tunnels and shafts, which start at a depth of 24m in the city and end at a depth of 80m with a diameter of 6m at the new treatment works. A total of eight modern EPB TBMS were used for the tunnel construction with groundwater pressures of up to 8 Bar. The tunnel was lined with a Corrosion Protection (CPL) secondary lining. The success of designing such a sewer tunnel to have a long service life in the severe exposure conditions of the Gulf illustrates how modern developments in service life design and tunnel design can be applied to such projects and the experience gained will be of relevance to upcoming major tunnel projects in the UK.


Shahzad H Orakzai, Programme Manager, Abu Dhabi Sewerage Services Company (ADSSC); Richard Graham, Project Director, Salini-Impregilo S.p.A.; Dr Carola Edvardsen, Technical Director, COWI A/S

Christmas Debate: This house believes further development of SCL for complex urban tunnels is the best way forward for our industry

[A meeting report has been uploaded to the Knowledge section] In the UK SCL has become the main method of tunnelling for many more complex projects such as stations. However, opinions vary as to whether it really represents optimised tunnelling technology. The debate will look to the future and ask if we believe focus on further development of SCL is the best way forward for our industry. This year's traditional pre-Christmas debate looks into Sprayed Concrete Lining and its development within our industry and the factors which promote or stifle it. The proposer and opposer will have 20 minutes each. The debate will then be opened up to the floor for 20 minutes. The main proposer and his opposition will then sum up for 5 minutes each and then the vote will be cast.


Proposing: Keith Bowers, London Underground; Opposing: Ross Dimmock, Normet UK