Search Results: 'National Grid'

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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

UK breaks record for longest hydraulically-inserted pipeline
19 November, 2020
UK energy company National Grid has completed what has been hailed as the world’s longest hydraulically-inserted pipeline, now officially recognised by Guinness World Records.

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

National Grid submits Snowdonia tunnel proposal
08 April, 2020
Great Britain – National Grid has proposed to move 3.5km of overhead power lines underground. If approved, a 4.4m-diameter, 3km-long tunnel will be dug in the area of the Dwyryd Estuary in Snowdonia, allowing for the removal of 10 pylons and significantly improving the aesthetic of the landscape.

National Grid awards LPT2 tunnels contract
19 December, 2019
Great Britain – National Grid has signed a GBP 400M contract with Hochtief-Murphy JV to deliver the tunnels and shafts for the London Power Tunnels (LPT2) project. The overall scheme will cost GBP 1bn (USD 1.3bn) and take six years to complete. This is the second phase of the LPT project.

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

Hinkley Point C reaches another key milestone
25 September, 2019
Great Britain – Tunnelling works have started at the Hinkley Point C project, UK’s first new nuclear power station in a generation. Almost 38,000 concrete segments are being installed to support the three underground marine tunnels at up to 33m below the seabed of the Bristol Channel.

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

Murphy’s new CEO
11 October, 2017
Great Britain - J. Murphy & Sons Limited has appointed John Murphy as its new CEO. Murphy was the company’s current chief operating officer as Tunnels and Tunnelling went to print, responsible for leading the group’s operations in the UK and abroad. CEO Steve Hollingshead will step down at the end of the year (December 2017) and take up a role as non-executive director on the company’s board.

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

Work begins on National Grid’s Thames Tunnel
15 December, 2016
Great Britain - Engineers were preparing to sink 30m deep shafts at locations alongside the Thames in West London as Tunnels and Tunnelling went to press. The sites were being prepared at the Royal Hospital Chelsea, Battersea Park and ahead of construction of the 330m-long tunnel by micro TBM.

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.