Ken (and everyone),
 
All examples are welcome - especially if data from an archaeological
survey can also provide information on other issues.
 
I would make the point also - to everyone - that case studies for work
undertaken on pipelines are great - and thanks to those who have sent
some through  - keep them coming...
 
BUT...

Please don't restrict yourselves to pipeline projects!  I am sure there
are tons of published examples of depth to bedrock, voids, rippability,
water tables and permafrost to name but a few on the list of issues.

The final format of the document is not set, but it is envisaged that
several references will (where possible) be attached to each issue, and
that links (for the electronic document), of appendices will contain the
full text of the papers.

I am concerned that we need the involvement of all
interested/knowledgeable parties to avoid missing key references in this
important document.
 
________________________________

From: The British Geophysical Association's Email Discussion List
[mailto:[log in to unmask]] On Behalf Of KENNETH HAMILTON
Sent: 27 March 2008 17:13
To: [log in to unmask]
Subject: Re: Case studies required

 

George,

   Are you including geophysical prospection for archaeological sites in
the guidelines?

         Ken

George Tuckwell <[log in to unmask]> wrote:

	Dear all,
	
	I write to tap the collective knowledge of the near surface
geophysics
	community, and in particular to solicit details of published
case
	studies of relevance to the construction of large pipelines.
	
	There is an initiative through IPLOCA to provide guidance
documents to
	address aspects of onshore pipeline construction. See the IPLOCA
web
	pages for more general information about the association.
	http://www.iploca.com/
	
	Of particular interest to the international geophysical
community is the
	remit of the group working on the Trenching Guideline document.
	
	Technical input into this working group and its subsequent
guidance
	document is an opportunity to raise the profile, and therefore
the
	commercial use, of shallow investigative geophysics.
	
	The most convincing evidence to place before the group is
published case
	studies, and I request that any case studies you have
undertaken, or
	know of in the literature, be sent to the email address below to
be
	collated and forwarded on. 
	
	Any and all geophysical techniques are to be included, including
	airborne techniques. 
	
	Peer reviewed publications are best, but other published
examples would
	also be useful, although out and out publicity material is
	inappropriate.
	
	A current working list of common issues (and environments)
against which
	to evaluate the potential for geophysics to provide an effective
	solution is as follows:
	
	
	For an existing pipeline-
	
	detection of pipeline
	detection of trench outline
	state of compaction of backfill
	
	For all terrains-
	
	Rockhead depth.... with type,strength and jointing as a plus
Soil strata
	boundaries....with soil type and strength as a plus Water table
	Voids/cavities Excavatability....for all types of ground (I am
mainly
	thinking here of the seismic velocity assessment of rock
excavatability)
	
	Glacial terrain....boulders, boulder size and frequency
	
	Swamp/wetland/muskeg terrain......depth of swamp
	
	Desert-
	
	thickness of strong caprock/caliche/duricrist, with underlying
material
	unknown, often soil salts depth of soft wet sabkha soils
	
	Permafrost or frozen ground-
	
	depth of frozen ground
	ice content
	soil type
	
	
	It would be ideal to compile a list of relevant case studies
against
	each of these (where appropriate of course).
	
	Could references, and pdfs of publications where possible, be
emailed to
	[log in to unmask]
	
	Yours in anticipation of an enthusiastic community-wide
response,
	
	George
	
	Dr George Tuckwell BSc PhD CSci CGeol FGS Director, Geophysics,
STATS
	Limited, www.stats.co.uk/geophysics Specialist Engineering,
Materials
	and Environmental Consultants Porterswood House, Porters Wood,
St
	Albans, AL3 6PQ, United Kingdom Direct Dial: +44(0)1727 798643,
Fax:
	+44(0)1727 798630
	
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