In AASHTO T 206, the sampler is set to the bottom the hole and a seating
blow is applied. The blows for each of three 0.15 m of penetration after
the seating blow are recorded
Michael R. Bleakney, P. Eng.
Geotechnical Engineer
New Brunswick Department of Transportation
Design Branch
PO Box 6000
Fredericton, NB
E3B 5H1
Canada
Phone: (506)453-2674
Fax: (506)457-6714
E-mail: [log in to unmask]
-----Original Message-----
From: Peter Narsavage [mailto:[log in to unmask]]
Sent: Friday, March 02, 2001 9:04 AM
To: [log in to unmask]
Subject: Re: SPT
Here in the USA (or at least in Ohio) we only make note of
the "seating" penetration if the weight of the rod and/or
the hammer causes the split-spoon sampler to penetrate the
first 6-inch interval (150 mm) or more. For example, if the
penetration due to the weight of the hammer was 8 inches
(200 mm) and then it took 3 and 4 blows to penetrate the
next 4 and 6 inches (100 and 150 mm), respectively, the SPT
test data would be recorded as: WOH, 3, 4.
My impression from the other responses is that this is
similar to what is normally done in the UK, but that BS 1377
Part 9 would require one to record that the initial
penetration was 200 mm. Am I correct?
-Peter
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___________________________________________________________
Peter A. Narsavage, P.E. * Geotechnical Engineer
mailto:[log in to unmask]
DLZ Phone-614.888.0040
6121 Huntley Rd Fax-614.888.6415
Columbus, Ohio 43229-1003 http://www.dlzcorp.com
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