Search Results: 'National Grid'

Geopolymer concrete in tunnelling
24 July, 2023
At the monthly BTS meeting at the Institution of Civil Engineers, in London, in March 2023, John Day, Chief Technical Officer of Wagners EFC Pty Ltd, Charles Allen, Director of OTB Concrete, and Richard Sutherden, Engineering Director with Murphy for the HMJV (Hochtief- Murphy Joint Venture) provided perspectives on the use and future potential of geopolymer concretes, and the Earth Friendly Concrete in particular, in underground applications

Packed schedule in Boston
28 June, 2023
TTNA previews the packed program for RETC 2023, in Boston, MA, in June

Challenges and successes
27 March, 2023
A brief snapshot sample of large and small utility tunnelling challenges and successes across the globe over recent months

Ken Spiby awarded James Clark Medal
27 December, 2022
The British Tunnelling Society has chosen Ken Spiby as recipient of the James Clark Medal for his major contributions to the industry

Tunnel to restore snowdonian landscape
22 April, 2022
An area of outstanding natural beauty, Snowdonia is scarred by unsightly pylons and overhead high-voltage cables. They will now be removed and placed in a new tunnel that forms part of a visual improvement project. Julian Champkin reports

Necessity fosters innovation
17 March, 2022
Whether for large- or small-diameter tunnels, utility investment calls for more underground methods, ushering in several innovative techniques in the process. Patrick Reynolds reports

Water mist systems and Road tunnel ventilation
12 August, 2021
Ingo Riess of Riess Ingenieur, Zurich, Switzerland, discusses the benefits and effects of water-mist systems on tunnel fires in road tunnels

National grids
25 March, 2021
Utility grid projects bring a variety of tunnelling challenges. Report by Patrick Reynolds

Pushing for victory
29 January, 2021
A National Grid project to push a 5km pipeline under an estuary of global importance to wildlife has resulted in the world’s longest pipeline river crossing in a tunnel, safeguarding the UK’s gas supply for a century and earning a place in Guinness World Records. Julian Champkin reports

Banging the drum
10 June, 2020
Kate Cooksey has just assumed the chair of the British Tunnelling Society, as only the first female ever to do so. Here she talks to George Demetri about her career and aspirations for the BTS

Keeping Pace
14 November, 2019
Frank Grundholm, vice president for global HVACR sales at ABB Motion, explains how variable frequency drives (VFDs) are used together with electric motors for the effective control of rail and road tunnel ventilation fans

Tunnelling costs and production rates benchmarked
30 September, 2019
Bill Grose of Bill Grose Consulting and Aleister Hellier of the Infrastructure Projects Authority at Her Majesty’s Treasury in the UK present this paper on efforts to benchmark UK tunnelling costs and production rates in 2018

The big conversion
12 April, 2019
Paola De Pascali spoke with Florent Detraux, tunnel construction manager at Vinci Construction Grand Projets, about the conversion of an NFM TBM to use Herrenknecht Variable Density technology on the third metro line Phase 4A in Cairo

UCT 2018
24 January, 2018
T&T’s guide to UCT and a round up of product and business news from this year’s exhibitors

Tunnelling in the jungle
22 January, 2018
Snakes and hard sandstone were among the challenges facing Seli Overseas on a new 11.5km low pressure headrace tunnel for a hydroelectric project in Laos

Shaft settlements
20 September, 2017
This technical note relates to the Harding Memorial Lecture presented by Dr Barry New, Geotechnical Consulting Group, at the ICE on 18 January 2017

Achievements and Aspirations
08 June, 2016
Last month saw a changing of the guard at the BTS, with Roger Bridge handing the Chairman’s baton over to Mark Leggett. They spoke to Sally Spencer about achievements thus far and plans for the future

First trains through delft
24 May, 2016
The construction of a four-track railway tunnel in Delft in the Netherlands has reached an important milestone. From March 2015, trains have been running on two tracks through the tunnel and station. The 2.3km-long tunnel runs through the historical city center and replaces a fly-over, which caused major nuisance due to noise and vibrations. This article addresses a brief history and description of the project, some main design risks (safety, vibrations, pressure waves, building damage control), the geological and geohydrological conditions and the construction methods

Pumping Below
24 June, 2015
Rising interest in pumped storage hydropower in the US could see more large underground excavations in coming decades. Report by Patrick Reynolds.

On the radar
24 June, 2015
Ground penetrating radar was used to investigate pavement settling in the Cumberland Gap mountain tunnel. Roger Roberts, senior software engineer for Geophysical Survey Systems, Inc, working with engineers at the Kentucky Transportation Center at the University of Kentucky, explains the research.