| Re: Petition to stop overcrowding on public transport |
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Group: uk.transport.london · Group Profile
Author: Colin RosenstielColin Rosenstiel Date: Jul 20, 2008 15:25
> On 19 Jul, 21:48, rosenst...@ cix.co.uk (Colin Rosenstiel) wrote: >> In article
>>
>>> The its-difficult-to-tunnel excuse no longer holds water in the
>>> 21st century
>>
>> So we have new geology in the 21st century? What's changed pray?
>
> Tunnelling technology , what do you think? The channel tunnel was
> built through dozens of miles of water bearing chalk under the sea so
> I don't think the "its nasty chalk not clay" really cuts it any more
> as an excuse not to build tunnels in south london.
Huh? Chalk has pretty similar tunnelling characteristics to clay. It's
the sand in south London that's hopeless. Look at how they built the JLE.
--
Colin Rosenstiel
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