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Engineering, 21.10.2020 16:01 didirose

A 2-ft long split spoon sampler was hammered into the ground using a 140 lb hammer with a drop height of 30 inches for the purpose of the SPT test and sampling. The recorded blow counts per 6 inches from a depth of 10-12 feet were 15-18-11-16. What is the (uncorrected) N-value from this data? a. 29 blows/ft
b. 60 blows/ft
c. 27 blows/ft
d. 33 blows/ft

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