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Not going viral
23 October, 2020
Many feared the outbreak of Covid-19 would wreak havoc on the tunnelling sector so how has it fared during the coronavirus pandemic? Perhaps not as disastrously as feared. Julian Champkin investigates

Two-Way Tunnelling in Seoul
23 October, 2020
Great Train Express (GTX) is a proposed high-speed commuter line with shared infrastructure that will connect new towns around the greater Seoul Metropolitan Area with the capital. It is the first project in Korea to use a large-bore TBM. Dr Warren Wangryul Jee, chairman and tunnel project manager of GTS-Korea, reports

Up the junction, round the bend
23 October, 2020
While pushing a preformed portal box through an excavation has been done before, a Network Rail project demands that it be done on a curve – and that hugely increases the complexity. Julian Champkin reports

Extending the Tamoios highway
23 October, 2020
Located mostly in Brazilian rainforest, the Tamoios highway and tunnel project is of critical importance to the Brazilian economy. It was the subject of the BTSYM talk in September given by project director Pedro Soares dos Anjos. Report by Divik Bandopadhyaya of London Bridge Associates

Automation, AI and the future of tunneling
23 October, 2020
Modern, mechanised tunnelling methods have had an enormous economic, environmental and cultural impact globally. To sustain long-term growth in tunnelling operations, industry and academia are researching new technologies to better handle challenging conditions. Among these, automation and artificial intelligence have an essential and promising role in the future of underground construction.

Groundwater control for tunnel cross passages
23 October, 2020
Dr Martin Preene of Preene Groundwater Consulting looks at the construction of cross passages and the various techniques for groundwater control and ground treatment

Silent Sentinels on watch in The Hague
22 September, 2020
Challenging municipal requirements were met using advanced instrumentation to provide accurate geomonitoring of road tunnels in the Netherlands

Innovation in wireless remote condition monitoring
22 September, 2020
Simon Brightwell and Markus Rennen of Senceive explain how wireless remote condition-monitoring can provide early warning of a wide variety of subterranean changes in tunnels and so help drive subsequent data-based decisions

Mexico’s Megatunnel
22 September, 2020
It is the world’s largest sewage project and has faced issues which mega projects of this nature usually face in terms of geology, delivery and budget. But T&T’s Julian Champkin finds that Mexico City’s Emisor Oriente is a triumph nevertheless

Connecting HS2 at Euston
22 September, 2020
Work on the UK’s new HS2 high-speed rail line is on track. Emma Hale and Christoph Eberle of Mott MacDonald describe one of the line’s first underground structures to be built in London

Improving Shotcrete’s Green Credentials
22 September, 2020
Sprayed concrete has been used for many years. Yet like all concrete, it has environmental drawbacks. Julian Champkin spoke with Dr Alun Thomas on ways to improve the carbon footprint of shotcrete tunnels

Tunnelling Under Live Loads
21 September, 2020
Tunnel and Underpass Projects beneath live railroads and highways are among the most sensitive and complicated underground projects in terms of design, construction, monitoring and, most importantly, safety. However, a good number of projects in this category have enough cover (preferably a minimum of a half to one tunnel diameter) to allow conventional tunnelling techniques to be implemented without any major risk to the travelling public.

Building tunnels in the 19th century
21 September, 2020
In June, Peter Harris, Director Tunnels and Civil Engineering COWI UK, gave to an online BTS audience a fascinating and scholarly presentation on how the Victorians built their tunnels. Ivor Thomas reports

Conexpo 2020
21 September, 2020
A visit to the Conexpo show in Las Vegas in March saw the US equipment industry in bullish mood, despite concerns about the coronavirus

Tunnel of steel nears completion
21 September, 2020
Another significant milestone has been achieved in the project to repair the longest tunnel in the world

A lighter look at belting
21 September, 2020
Jason Schneider of Tennessee-based Cobra America outlines the salient features of a new type of conveyor belt material claimed to result in economies and greater safety for the work force

Building the mixed-ground mega tunnel
21 September, 2020
Roberto Gonzalez of The Robbins Company outlines the challenges and solutions on Mexico’s Emisor Oriente, one of the country’s most specialised projects with possibly the toughest, most complex conditions ever encountered by EPB TBMs

Muck disposal on a grand scale
25 August, 2020
Tideway (the so-called ‘super sewer’) is the biggest water infrastructure project in Europe and aims to rid the River Thames of millions of tonnes of raw sewage inflows every year. Julian Champkin reports on the progress so far

Ground freezing
25 August, 2020
Artificial ground freezing is an environmentally-friendly construction technique which provides temporary excavation support and groundwater control during tunnel construction. This method comes into its own when tunnels and shafts need to be built in difficult geological and hydrological ground conditions.

A Kit of Parts
25 August, 2020
Precast concrete segments are made to exacting tolerances and demand streamlined manufacture and transportation. Julian Champkin investigates the challenges