GEO5 Software

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Limit Resistance and Bearing Capacity Factor Nq

Limit base qb,lim and shaft fs,lim resistances and bearing capacity factor Nq are calculated according to the pile skin friction angle δ (table 7-8).

Soil Density

Soil

Pile-soil friction angle

Limit shaft resistance

Bearing capacity factor

Limit base resistance

δ [°]

fs,lim [ksf]

Nq

qb,lim [ksf]

Very loose

Loose

Medium

Sand

Sand-Silt

Silt

15

1.0

8.0

40.0

Loose

Medium

Dense

Sand

Sand-Silt

Silt

20

1.4

12.0

60.0

Medium

Dense

Sand

Sand-Silt

25

1.7

20.0

100.0

Dense

Very dense

Sand

Sand-Silt

30

2.0

40.0

200.0

Dense

Very Dense

Štěrk

Sand

35

2.4

50.0

250.0

The values in the table are based on imperial units [ksf] - the program automatically converts everything to the units used in the program.

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