Piling 400 x 400

CALCULATION FOR GEOTECHNICAL PILE CAPACITY

DATE

12-Aug-14

Designed by: Structure : Borehole No.: 1 Ground Level RL + GWT RL + Cut of level RL Type of pile:

1.5 1.8 R

m m m

Concrete Grade: Pile X-Sectional Area: Structural Capacity: 70% of Struct Cap:

45 0.160 1800 1440

N/mm2 m2 kN kN

n.b : S : Spun ; R: Square

Partial Safety Factor for Shaft Friction, Fps

1.5

Shape of pile: B

Partial Safety Factor for End Bearing, Fpb

3.0 2.0

SQUARE

H Soil Description c-clay,s-sand r-rock c C S C C S C C S S C S S S S S S S

0.4

m

Global Safety Factor,F

0.4

m

Column Load

Depth (m)

SPT

0

-

1.5

1.50 3.00 4.50 6.00 7.50 9.00 10.50 12.00 13.50 15.00 16.50 18.00 19.50 21.00 22.50 24.00 25.50

-

3.00 4.50 6.00 7.50 9.00 10.50 12.00 13.50 15.00 16.50 18.00 19.50 21.00 22.50 24.00 25.50 27.00

Allowable Geotechnical Pile Capacity Total Negative Skin Friction Pile Length

0 5 4 3 0 0 4 8 8 9 4 6 50 50 50 50 50 50

cu (kPa)

0

5 33 20 5 27 53 27 -

5 4.5 5.25 1.75 0.75 4 9 11 13 8.25 9.25 52.5 64 75 75 75 75

kN kN m

Adhesion factor

6.6666667

kN

Frictional Resistance

SPTave for end bearing

335.05 21.0

11000

Correlation for Cu (kPa): (2/3)10 * SPT-N Unit shaft friction (sand): 1 * SPT-N End bearing (sand): 400 * SPT-N Adhesion α for driven pile in clay (API method): = 1.0 for cu<25kPa = 0.5 for cu>70kPa = 1.0-0.5(cu-25)/50 for 25
End Bearing

Qall

Qall

Qall

fs (kPa)

Qs (kN)

sum(Qs) (kN)

fbu (kPa)

Qp (kN)

Partial

Global

α

(kN)

(kN)

Applied (kN)

1.0 0.9 1.0 1.0 1.0 0.7 1.0 -

5.0 30.6 4.0 20.0 5.0 0.0 26.2 38.2 8.0 9.0 26.2 6.0 50.0 50.0 50.0 50.0 50.0 50.0

9.4 57.6 7.5 37.7 9.4 0.0 49.4 72.0 15.1 17.0 49.4 11.3 94.2 94.2 94.2 94.2 94.2 94.2

9.4 67.0 74.5 112.2 121.6 121.6 171.0 243.0 258.1 275.1 324.5 335.8 430.0 524.2 618.4 712.6 806.8 901.0

45 300 1800 180 45 300 240 480 4400 5200 240 3700 21000 25600 30000 30000 30000 30000

7.2 48.0 288.0 28.8 7.2 48.0 38.4 76.8 704.0 832.0 38.4 592.0 3360.0 4096.0 4800.0 4800.0 4800.0 4800.0

8.68 60.66 145.68 84.40 83.48 97.08 126.82 187.62 406.74 460.71 229.11 421.18 1406.65 1714.78 2012.25 2075.05 2137.85 2200.65

8.31 57.49 181.26 70.50 64.41 84.81 104.71 159.92 481.05 553.53 181.43 463.89 1894.99 2310.09 2709.19 2756.29 2803.39 2850.49

8.31 57.49 145.68 70.50 64.41 84.81 104.71 159.92 406.74 460.71 181.43 421.18 1406.65 1714.78 2012.25 2075.05 2137.85 2200.65

Note :

1. SPTave = Average SPT 10D above and 4D below the pile point

2. Group Capacity need to be check upon determnining of pile number used.