Given 500mm dia. spun pile capacity is 2,000 kN:

a) name 3 reason will you will choose pile foundation over footing system.

b) column load is 7500 kN, what is the reaction on each pile if the pile is installed at the correct position?

c) propose your estimated pile penetration depth using the SI information provided. Pile length to calculate from cut-off level. (FOS of 2 for both friction and base resistance, fs = 2N, fb =250N). What is the estimated min. require pile length if pile working capacity is 2000 kN (pile length shall be calculated below cutoff level).

d) based on the deviated pile position, what will the max. pile load is? Will there be a difference in max? pile load in comparison with piles installed at the correct position?

e) justify your finding at d) with calculation

f) based on your justification at e), is any rectification (remedial / strengthening ) proposal required? if yes, what is the proposal? please sketch.

Depth (m)	Soil Type	SPT-N
0 - 7	Clay	12
7 - 14	Medium dense sand	20
14 - 30	Sandy clay	30
> 30	Very dense sand	50

Fs = 2N, FB = 250N, FOS for both Fs & FB is 2
 

| 1000 | 1000 | 1000 O O 1000 15001 20 5000 SPUN PILE DEVIATED PILE