Latest from Tunnels and Tunnelling


Los Condores making progress
20 January, 2017 Chie - The TBM boring the Los Condores Hydroelectric Power Plant has completed the 900m access tunnel and is working on the first section of the headrace tunnel. The machine, a 4.56m Robbins double shield was launched on 27 May and has so far excavated 1,300m.
  • WSP Parsons Brinckerhoff rebrands as WSP
    United States - WSP Parsons Brinckerhoff will assume the WSP name effective May. The firm has operated as WSP Parsons Brinckerhoff since the acquisition of Parsons Brinckerhoff by WSP in October 2014.
  • Court rules against Glendoe client
    Great Britain – A court has issued its ruling on the Glendoe collapse, finding in favour of contractor Hochtief at the expense of client Scottish & Southern Energy (SSE). The decision was given on 21 December and denied SSE a GBP 130M (USD 160M in Jan 2017) damages claim against Hochtief. The contractor will however have to pay low availability damages of GBP 1M (USD 1.24M in Jan 2017) for not completing the remedial work.
  • IPS launches Metro Crane
    IPS Cranes has expanded into the underground railway market with the introduction of the IPS Metro Crane.


To cast or not to cast
08 December, 2016 Vincent van de Vrie, discusses the merits of cast-in gaskets for precast concrete tunnel ring segments
  • Impervious Infrastructure
    Spray on waterproof membranes remain a niche market but when it comes to complex geometries and potential tunnel design the advantages are becoming more widely understood and accepted
  • Two Tribes
    The first on-site comparison between NAtM and Adeco-RS during construction of the “Dubler Kurortnogo prospekta” tunnels in Sochi (Russia)
  • Oh MIA Bella Madonnina
    Paola De Pascali visited sites of Milan Metro Line 4, which will cross the city from West to East along the old town centre and Roman ruins
  • Cowi UK Comes Together
    As Cowi acquisitions Donaldson Associates and Flint & Neill prepare to form Cowi UK in the New Year, Tunnels & Tunnelling speaks to Andy Sloan, managing director of Donaldson Associates about the new changes and the journey from “Donaldson’s” as it is known in the UK, to Cowi


Blanka Two
05 December, 2016 Rumblings from the City Hall of Prague suggest a new tunnel complex may be planned for the Czech capital. The story was broken in late November by the economicsfocused Prague daily newspaper ‘Hospodárské noviny’. The project hopes to complete the Prague’s inner ring road and resolve the city’s traffic problems. According to the newspaper, around CZK 80M (USD 3.14M) has been put aside for design and study preparations in 2017. Of course the Final project will be far more, around CZK 50bn (USD 1.97bn) according to early estimates.
  • Dust to dust
    No matter, the type of infrastructure, going underground is preferable in most cases, but really the choice is made due to limited or costly surface space. The choice to go underground is a necessity to meet the demands of a growing population.
  • For example
    sales volume in the US, overall, was down 0.2 per cent in 2015. However, the sales volume for craft beer was up 12.8 per cent in the same period. It shouldn’t be much of a surprise to anyone—prolific growth across the US for microbreweries, brew pubs, tap rooms and even home brewing has been a hallmark of the last decade.
  • Getting both sides
    In mid-August the construction union UCATT issued a statement saying that Laing O’Rourke’s new safety policy ‘safety differently’ could erode the foundations of health and safety culture. It further argued that the company’s new director of health and safety for construction, Andy Sneddon, wants to impose detrimental views from Professor Sidney Dekker “who advocates sweeping away a lot of the detail in health and safety provision, and just concentrating on saving lives”. This, it said, neglected the impact of more minor workplace injuries on workers’ lives.
  • Tunnel Buzz
    So the referendum came and went, and the UK looks set to leave the European Union. Emotions are high and column inches long when it comes to the topic so I won’t add my refl ections on the politics or economics of the situation here.