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  1. rochplayer

    Effect of increased overburden pressure on SPT blow counts

    I am doing some preliminary liquefaction evaluation of a flat site in a high-seismicity area. The site soils are loose to medium dense, clean sands and gravels of glacial outwash and alluvial origin. I have good blow count, groundwater, ground acceleration, and earthquake magnitude...
  2. rochplayer

    Correlations between non-standard split spoons and SPT

    Here in Alaska we deal with oversized granular material that makes sampling with SPT problematic. A common solution here is to use a 3" OD, 2.5" ID oversized split spoon sampler driven with a 340-lb hammer falling 30". The resulting blows "approximate" the SPT, plus we...

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