Design of a shallow foundation

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Reference no: EM13947796

Following are the standard penetration numbers determined from a sandy soil in the field:

Depth (ft)	Unit weight of soil (lb/ft2)	N60
10	106	7
15	106	9
20	106	11
25	118	16
30	118	18
35	118	20
40	118	22

Using Eq. (3.30), determine the variation of the peak soil friction angle, f9. Estimate an average value of f9 for the design of a shallow foundation. (Note: For depth greater than 20 ft, the unit weight of soil is 118 lb/ft3.)

Reference no: EM13947796

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Design of a shallow foundation : Using Eq. (3.30), determine the variation of the peak soil friction angle, f9. Estimate an average value of f9 for the design of a shallow foundation. (Note: For depth greater than 20 ft, the unit weight of soil is 118 lb/ft3.)

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