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A standard penetration test (SPT) has been conducted in a loose coarse sand stratum to a depth of 16 ft below the ground surface. The blow counts obtained in the field were as follows: 0 – 6 in = 4 blows; 6 -12 in = 6 blows; 12 -18 in = 8 blows. The tests were conducted using a US-style donut hammer in a 6 inch diameter boring with a standard sampler and liner. The effective unit weight of the loose sand stratum is about 93.8 pcf. Determine the corrected SPT if the testing procedure is assumed to only be 60% efficient.

A standard penetration test (SPT) has been conducted in a loose coarse sand stratum to a depth of 16 ft below the ground surface. The blow counts obtained in the field were as follows: 0 – 6 in = 4 blows; 6 -12 in = 6 blows; 12 -18 in = 8 blows. The tests were conducted using a US-style donut hammer in a 6 inch diameter boring with a standard sampler and liner. The effective unit weight of the loose sand stratum is about 93.8 pcf. Determine the corrected SPT if the testing procedure is assumed to only be 60% efficient.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A standard penetration test (SPT) has been conducted in a loose coarse sand stratum to a depth of 16 ft below the ground surface. The blow counts obtained in the field were as follows: 0 – 6 in = 4 blows; 6 -12 in = 6 blows; 12 -18 in = 8 blows. The tests were conducted using a US-style donut hammer in a 6 inch diameter boring with a standard sampler and liner. The effective unit weight of the loose sand stratum is about 93.8 pcf. Determine the corrected SPT if the testing procedure is assumed to only be 60% efficient.
Transcribed Image Text:A standard penetration test (SPT) has been conducted in a loose coarse sand stratum to a depth of 16 ft below the ground surface. The blow counts obtained in the field were as follows: 0 – 6 in = 4 blows; 6 -12 in = 6 blows; 12 -18 in = 8 blows. The tests were conducted using a US-style donut hammer in a 6 inch diameter boring with a standard sampler and liner. The effective unit weight of the loose sand stratum is about 93.8 pcf. Determine the corrected SPT if the testing procedure is assumed to only be 60% efficient.
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