View previous topic::View next topic |
Author |
Message |
Devgun SEFI Member
Joined: 24 Jun 2016 Posts: 1
|
Posted: Fri Jun 24, 2016 6:31 amPost subject: Standard Penetration Test |
|
|
We driven split spoon sampler only 45cm (15cm each) in STP test when collecting a sample, why not more or less than this depth? |
|
Back to top |
|
|
es_jayakumar General Sponsor
Joined: 24 Nov 2011 Posts: 1408 Location: Cochin
|
Posted: Fri Jun 24, 2016 7:00 amPost subject: |
|
|
Because, it is a world-wide accepted standard, to maintain uniformity in the procedure adopted anywhere in the world. Likewise, the weight of the hammer and the height of its fall are also standardised. You will know that there are several correlations for soil properties with the N value obtained by the SPT. The N value is the number of blows required for penetrating the sampler through 30cm, after the seating of drive of 15cm. If we use the penetration distance at our will, the correlations will go meaningless. Please be informed that the purpose of SPT is not collecting samples alone !
E S Jayakumar |
|
Back to top |
|
|
|
|
Youcannotpost new topics in this forum Youcannotreply to topics in this forum Youcannotedit your posts in this forum Youcannotdelete your posts in this forum Youcannotvote in polls in this forum Youcannotattach files in this forum Youcannotdownload files in this forum
|
|
|