5. An SPT test was performed at a depth of 4 meters below the ground surface...
5. An SPT test was performed at a depth of 4 meters below the ground surface and the following values were obtained: 5-8-10 (each value over a 15 cm depth increment). The efficiency of the SPT hammer was measured as 70%. The unit weight of the soil from 0 to 2 meters is 19.7 kN/m3 , the unit weight of the soil from 2 to 3 meters is 18.6 kN/m3 and the unit weight of the soil from 3 to 4 meters feet is 19.2 kN/m3 . The water table was encountered at a depth of 2.5 meters.
a) Using (N1)60=CN*N60 calculate the N160 value for the sample at 4 meters.
(
b) Assume the SPT sample at 4 meters consisted of a clean,
fine-grained sand (SP). Using Equation drained friction angle=
(
(15.4(N1)60)^.5,)+20
estimate the drained friction angle for the SPT sample
Homework Answers
![Solution At 8=19.7 kN/m3 - 2 m 12.5m Depth of 4m. value obserbed, (5-8-10) - N = 8+10 ->(N=18] 8 = 18.6 kNm3 W .T . 3m 8 - 19](http://img.homeworklib.com/questions/92353890-8a74-11eb-8011-8fa0ef4a35b8.png?x-oss-process=image/resize,w_560)
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5. An SPT test was performed at a depth of 4 meters below the
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Question The following table gives the variation of the field standard penetration number (SPT) (N60) in...
Question The following table gives the variation of the field standard penetration number (SPT) (N60) in a sand deposit Depth (m) N60 1.5 4 3.0 6 4.5 8 6.0 10 7.5 12 9.0 14 The groundwater table is located at a depth of 4.5 m. The dry unit weight of sand from 0 to a depth of 4.5 m is 19.2 kN/m2, and the saturated unit weight of sand for a depth of 4.5 m to 10 m is 20.2...
The following table shows the variation of the field standard penetration number (N60) in a sand deposit. The ground water table is located at a depth of 6m. The dry unit weight of sand from 0 to a depth of 6m is 20.6 kN/m3, use the suitable relationsh
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PLEASE FILL IN THE TABLE AND SHOW SAMPLE CALCULATIONS,
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