122398288 rcc bore cast in situ pile capacity design excel
TRANSCRIPT
PILE CAPACITY DETERMINATION FOR BORE CAST IN-SITU
INPUTSUNIT CONVERSION
Pile Dia (D) 20 inCohesion
Pile effective length 33 ftEnd pile point SPT value (corrected) 32.5 Dry densityAverage SPT value along pile shaft 13.56 Unit WeightEnd pile point Cohesion 0.101 kip/ft2 SPT value (>15)Averrage cohesion along pile shaft 0.020 kip/ft2 Corrected SPT valueUnit weight 90.500 lb/ft3 Plasticity Index (LL-PL)Pick pressure point (start) 15 Cohesion (Bottom end)
Water pressure at pick point 0.000 kip/ft2 Avrg. Cohesion (shaft)Grain Size distribution:Sand 84.00 %Silt 16.00 %Clay 0.00 %Friction capacity factor (λ) 0.239629557371052
RESULTSNet end bearing = 174.00 kipNet skin friction= 11.91 kip
Total pile capacity=185.91 kip92.96 ton
83.66 ton
10% reduction due to negetive screen
friction 0 10 20 30 40 50 60 70 800
0.1
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0.6
Pile embedment length (metres)
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PILE CAPACITY DETERMINATION FOR BORE CAST IN-SITU
UNIT CONVERSION0.0100 kg/cm2 PASS?
0.0209 kip/ft20.0130 KN/m2 Layer depth 18 7 3 4 3.50.0009 kip/ft2 Cohesion 2.64 2.59 2.6 2.64 2.671.250 gm/cc Total depth 35.5
77.9027 lb/ft3 Average cohesion 2.62971831412822
0.3439 kip/ft2
0.2299 kip/ft2
DESIGN BY: Abid Moin UddinEMAIL: [email protected]
0 10 20 30 40 50 60 70 800
0.1
0.2
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Pile embedment length (metres)
Fri
cti
on
cap
acit
y f
acto
r
a. End bearing:
514.8 ≤ 260
q₁ 260 Kip
End bearing capacity 189.0778 Kip
2. Clay soil 0.9072 15 * D= 25
End bearing capacity 0.659736 Kip
b. Skin friction:
1. Sandy soil 10.91544 Kip 8
2. Clay soil 23.29834 Kip
Net end bearing = 174.0043 Kip
Net skin friction= 11.90607 Kip
Total pile capacity= 185.9104 Kip84.50473 Ton
76.05426 Ton
1. Sandy soil (q₁)
10% reduction due to negetive screen friction
PILE EFFECTIVE LENGTH 10.06 m λ 0.23963
Depth(metres) λ
0 0.5
10 0.24
20 0.178
30 0.157
40 0.14
2.2625 50 0.125
60 0.12
70 0.117
80 0.1125
2.2625
Kip/ft²
Kip/ft²