Latest from Tunnels and Tunnelling
Fire performance of concrete tunnel linings
Fire testing of concrete tunnel linings and the effects of explosive spalling were the subject of the British Tunnelling Society talk in March. Rosa Diez of Mott MacDonald reports
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Frozen Assets
Joe Sopko, director at Keller North America, reports on the ground freezing of two shafts on a project involving a 9.7km long, 1,800mm-diameter effluent pipeline tunnelled from an existing sewerage plant to a barrier island outfall structure
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Getting high in Paris
Joseph A Dos Santos of Dos Santos International outlines the principles and benefits of sandwich conveyors and their current use on the Paris Metro expansion
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VDOT gives green light for HRBT construction start
A Notice to Proceed (NTP) has been issued by the Virginia Department of Transportation (VDOT) for construction work to start on the US$3.8bn Hampton Roads Bridge-Tunnel Expansion project in Virginia, US.
A Notice to Proceed (NTP) has been issued by the Virginia Department of Transportation (VDOT) for construction work to start on the US$3.8bn Hampton Roads Bridge-Tunnel Expansion project in Virginia, US.
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Flooding raises questions over SMART tunnel efficacy
Questions are being asked as to why the SMART tunnel did not protect Kuala Lumpur after extremely heavy rainfall caused major flooding in the Malaysian capital recently.
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New Sandvik simulator is designed for safer training
Underground drill operators and maintenance teams can now train in a safer environment thanks to the introduction of the latest Sandvik training simulator. Sandvik says it has developed Digital Driller to improve performance in underground hard-rock drilling, whether in tunnelling or mining applications.
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WTC2020 opens successfully but without the usual ceremony
Monday 14 September saw the official opening of the World Tunnel Congress (WTC2020) under an extraordinary virtual scenario brought about by the coronavirus pandemic.
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IEM confirms WTC2020 congress format
Malaysia’s Institution of Engineers (IEM) has outlined the format of the 2020 World Tunnel Congress (WTC2020) which has been transferred to a full digital platform due to safety concerns over the coronavirus pandemic. The decision to go virtual by streaming the programmes via a secured digital platform was taken in conjunction with ITA-AITES.
LATEST FEATURES
Another significant milestone has been achieved in the project to repair the longest tunnel in the world
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A lighter look at belting
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
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Building the mixed-ground mega tunnel
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
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Muck disposal on a grand scale
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
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Ground freezing
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.
