Hello again from the T&TI team and welcome to another bumper September issue, which includes our regular back to back T&T North America supplement.
Plenty for everyone again this month including our usual spread of international news, site reports from around the world, project overviews, and cutting edge technical articles.
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After a brief foray into the Alpine region – that includes a few tip-offs for some really exciting work coming up in Austria next year – we head up to Sweden where we report on progress on the Bothnia High Speed Rail Line. T&TI’s assistant editor, Patrick Hudd, made the journey into the country’s north to see how man and machine are constructing tunnels through the region’s hard rock using drill and blast.
Next we delve into the highbrow world of equations courtesy of specialist, Professor Nick Barton, who in the first of a two-part article attempts to unravel the theory of high pressure grouting for us in our special grouting technical review.
To the antipodes next, where T&TI correspondent Shani Wallis visited the offices of Perth’s MetroRail Tunnel project to gleam an insight into the intricate preparations underway to ensure Western Australia’s most challenging tunnelling project to date goes smoothly, both technically and contractually.
Following this we head back into the technical world, with Part 1 of another two part article, that describes the limitations of existing rock mass classification schemes and proposes a new and hopefully more flexible method for working in atypical ground conditions. No apologies by the way for starting two, two-part articles this month. Rarely do we entertain the prospect of even one article spread over two issues, but we reckon these are both worthy contenders, although you’ll have to wait until next month for the conclusions!
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By GlobalDataBack on home ground for the final two articles, the first of which comes from London’s Channel Tunnel Rail Link Section 2. Authors describe how they devised and implemented a customised automated monitoring system – required to keep all informed of any ground movements associated with driving two 8m diameter EPBMs under London’s busy rail networks. Finally, our regular British Tunnelling Society report describes the safety upgrades being provided for the Mersey Tunnels in the UK’s northwest.
Once you’ve finished, flip the magazine over and catch up with the US tunnelling industry in Volume 14 of T&TNA.
Tris Thomas
