London Banter - View Single Post

Bruce[_2_]

On Wed, 9 Sep 2009 15:20:50 +0000 (UTC), wrote:
On Wed, 9 Sep 2009 16:06:03 +0100
"Basil Jet" wrote:
wrote:
*sigh* I hate to break this pre-GCSE news to you, but the area of the
shaft of a cylinder increases *linearly* with increasing radius, not
as the square of it so the cost of the lining will not go up like
that. The formula you want incidentaly is 2*pi*r*h. So before you
post anymore bull**** pretending your in-the-biz you might want to
revisit your school books first.

It's a good job you didn't write those schoolbooks, otherwise they'd say
that a one-inch diameter pipe and a five-metre diameter pipe need walls
which are the same thickness.

Remind me how a 10% increase in diameter size required to fit UIC gauge trains
in the tunnel in mostly self supporting london clay is going to cost so much
more because of huge extra lining thickness apparently required.

You are truly, profoundly ignorant, because if there is one thing that
London Clay demonstrably is not, it is "self-supporting".

A lot of good science has gone into the manufacture of sophisticated
unbolted concrete linings that not only support the far from
"self-supporting" London Clay, but deform in a controlled way to offer
greater support where needed.

These concrete linings require great precision in manufacture, with
tolerances that are much tighter than those usually achieved in
precast concrete manufacture, being more comparable to the manufacture
of precision cast and ductile iron linings.

Of course, as a time-served and fully qualified ****wit you couldn't
possibly have known any of this, which is why it would have been a
sensible idea for you to STFU in the first place. But you are Boltar,
and Ignorant always beats poor old Sensible, and Knowledgeable and
Expert never get a look in.