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Grey cast iron linings – new structural insights
24 July, 2023
The Harding Prize Competition is named after the founder of the British Tunnelling Society, Sir Harold Harding, and is for entrants under the age of 33. Shortlisted papers were presented to the BTS evening meeting on 13 April, at the Institution of Civil Engineers, in London. Agustín Ruiz López, postdoctoral researcher with the Department of Civil and Environmental Engineering, Imperial College, London, was a runner-up in this year’s Competition with a paper entitled ‘New insights into the structural behaviour of grey cast iron tunnel linings’. It is published here with the author’s permission

Structures to intercept pile loads
23 May, 2022
Cate Anthony was runner up in the BTS Harding Prize 2021 with her paper ‘The Design and Construction of Pile Interception Load Transfer Structures at 6-8 Princes Street for Bank Station Capacity Upgrade’

Instruments of progress
28 January, 2022
In this second article on closed-form analytical methods, Stephen Doran looks at the results of the available instrumentation and compares them to the predictions from the mathematical models

Implementing parametric design
28 January, 2022
Benjamin Lafarga, 31 and a tunnel engineer with Mott MacDonald, UK, won the BTS Harding Prize 2021 with a paper entitled ‘Implementation of parametric design in the tunnelling industry’. It is reproduced here with the author’s permission

BTS conference opens its doors to the tunnelling fraternity
29 September, 2021
Having opened on Thursday 30 September, the two-day BTS 2020+1 British Tunnelling Society annual conference and exhibition held at the QE2 Conference Centre, London has started to welcome visitors from around the world.

SCL optimisation at bank – a combined lining approach
10 April, 2019
The Bank Station upgrade project made use of a combined lining system, comprising primary and secondary fibre-reinforced sprayed concrete linings. This paper highlights the design considerations for different components of the combined lining.

BTS Specification for Tunnelling – call for comments
19 March, 2019
Great Britain – The BTS is seeking comments on its Specification for Tunnelling ahead of the next major revision. A blog has been created which will allow tunnelling industry professionals to provide their input, be it related to a single clause or to whole sections.

Finsbury park square works
16 May, 2018
The November BTS talk describes the square works for Finsbury Park and was presented by three speakers; Farid Acha, lead tunnel engineer for London Underground; John Elliot, director of underground infrastructure for Golder, and Menelaos Lydakis, chartered engineer and project manager of Spencer Group. The talk gives an insight into the scheme design of the project, detailed design and how it was finally implemented during the construction of the scheme. This report was prepared by Rosa Diez of Mott MacDonald

Over and under
25 April, 2018
The Hong Kong-Zhuhai-Macao Bridge and Tunnel project called for the construction of two artificial islands linked by a 6.7km-long subsea tunnel. The impressive project shows tunnelling to be a versatile solution for this busy shipping lane. The authors of this article are Lin Ming, China Communications Construction Co; Lin Wei, CCCC Highway Consultants Co.; Liu Xiaodong, CCCC Highway Consultants Co.; Yin Haiqing, CCCC Third Harbor Engineering Co.; Lu Yongchang, CCCC-FHDI Engineering Co.; Liang Heng, China Harbour Engineering Co. and Gao Jibin, CCCC Second Harbour Engineering Co.

Crossrail SCL Design
26 March, 2018
Mott MacDonald project director Rosa Diez looks at the work required for Crossrail’s contract C121 – sprayed concrete lining design

Smart Ground Support
31 January, 2018
Nicholas Vlachopoulos, professor with the Royal Military College of Canada, and Bradley Forbes, PhD candidate at Queens University, share their research into continuous strain monitoring using fiber optics

Deep pile foundation interceptions in tunnelling at bank station
12 October, 2017
This article is a reproduction of Omar Mohammed’s Harding Prize winning paper. The original can be found on the BTS website

Eyes on the prize
12 October, 2017
The BTS Harding Prize recognises outstanding performance in the tunnelling industry by young engineers under the age of 33. Sally Spencer spoke to this year’s winner, Transport for London’s Omar Mohammed

Upgrading bond Street
29 June, 2017
London Underground Bond Street Station Upgrade Project (BSSU) is due for completion and open to public in April. In December’s British Tunnelling Society Meeting, the project was told from the perspective of the SCL designer and the contractor working in a one team environment. Through innovation and utilising the latest technology they pushed the SCL design boundaries and developed a safe system of work by minimising the impact on infrastructure while optimising the excavation times to create necessary additional underground space. The speakers were Richard Watts, project manager, London Underground; Steve Nuttall, project director, Color; Andreas Spiegl, principal tunnel engineer, Dr Sauer & Partners and senior SCL engineer on site

Heritage brand
31 October, 2016
A buoyed tunnelling industry and a number of domestic political gestures are restoring confidence in uK manufacturing. Davy Markham is one brand looking to increase its showing in the tunnelling industry. Alex Conacher reports

Fisher street crossover: construction of the secondary lining
08 June, 2016
Engineers working at the Fisher Street Crossrail site analyse the secondary lininginstalled for a crossover between the two main lines

Bond street takes on the crowds
25 August, 2015
A GBP 320M (USD 490M) upgrade of Bond Street London Underground station will add much needed capacity prior to Crossrail’s arrival in 2018. Sally Spencer reports

Northern Line Extension TBMs ordered
23 March, 2015
GREAT BRITAIN – The contract to manufacture the Northern Line Extension TBMs has been awarded. London Underground (LU) announced this month that the contract had been awarded to NFM Technologies.

Major Australian contractor acquired by Chinese corporation
07 January, 2015
AUSTRALIA - John Holland is to be acquired by China Communications Construction Company (CCCC). Leighton Holdings announced last month that it had entered into a binding share sale agreement with a CCCC subsidiary, CCCI. CCCI has a market value of AUD 23.5bn.

Crossrail Western tunnels: TBM Breakthrough at Bond street station
10 October, 2014
The construction of the Crossrail Western tunnels saw two tunnel boring machines (TBMs) build 13.7km of tunnel below the streets of central London.