Question: Measured SPT - N values are given on Figure 1 . Calculate average internal friction angle of soil using Schmertmann equation ( 1 9 7

Measured SPT-N values are given on Figure 1. Calculate average internal friction angle of soil using Schmertmann equation (1975).
Note: China donut free fall type, standard sampler, boring diameter : 100 mm
Measured SPT - N values are given on Figure 1 .

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