Pile Capacity

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PILE DESIGN Page 1 of 10 321134328.xls:Calculations 06/14/2016:19:36:28 DESIGN OF PILES BASED ON LOAD CAPACITY This program considers the following cases: Enter data in yellow cells Design Input Value Units Comment 1. Pile Pile type d - Shaft diameter or width 300 mm Base diameter or width 300 mm Shape r - Design Load 1000 kN 2. Design Criteria Factor of Safety (Bearing) 1 - Factor of Safety (Shaft) 1 - Factor of Safety (Overall) 1 - 3. Soil Type n - Bulk unit weight 18 Depth to water table 1 m Strength parameters specified at starting depth of: 1.5 m and depth increments of: 1.5 m Design Assumptions 1. Uniform pile type (bored or driven), 2. One type of soil (cohesive or cohesionless), but properties may vary with depth. It computes the variation of pile capacity with length and size. d=driven b=bored r=round s=square c=cohesive n=non-cohesive kN/m 3 Reference: B. Look, "Spreadsheet Geomechanics - An Introduction", Balkeema, Rotterdam, 1994. Values of end bearing pressures and shaft friction/adhesion from Australian Standard AS2159-197X Spreadsheet by: J.P. Carter, Centre for Geotechnical Research, University of Sydney, AUSTRALIA Last Modified: 15 May, 2002

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Pile Capacity

Transcript of Pile Capacity

Page 1: Pile Capacity

PILE DESIGN

Page 1 of 10 321134328.xls:Calculations 06/14/2016:19:36:28

DESIGN OF PILES BASED ON LOAD CAPACITY

This program considers the following cases:

Enter data in yellow cells

Design Input Value Units Comment1. Pile

Pile type d -

Shaft diameter or width 300 mmBase diameter or width 300 mm

Shape r -Design Load 1000 kN2. Design CriteriaFactor of Safety (Bearing) 1 -Factor of Safety (Shaft) 1 -Factor of Safety (Overall) 1 -3. Soil

Type n -

Bulk unit weight 18Depth to water table 1 mStrength parameters specified at starting depth of: 1.5 mand depth increments of: 1.5 m

Design Assumptions

1. Uniform pile type (bored or driven),2. One type of soil (cohesive or cohesionless), but properties may vary with depth.It computes the variation of pile capacity with length and size.

d=drivenb=bored

r=rounds=square

c=cohesiven=non-cohesive

kN/m3

Reference: B. Look, "Spreadsheet Geomechanics - An Introduction", Balkeema, Rotterdam, 1994.

Values of end bearing pressures and shaft friction/adhesionfrom Australian Standard AS2159-197X

Spreadsheet by: J.P. Carter, Centre for Geotechnical Research, University of Sydney, AUSTRALIA

Last Modified: 15 May, 2002

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PILE DESIGN

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DESIGN OF PILES BASED ON LOAD CAPACITY

Computation Table

Depth

L ZL F Nq(m) (m) - (kPa) - (kPa) (kPa) (kN) (kN) (kN) - (kN)

0 m 2.40 1.00 0.00 100.00 0.00 0.00 0.00 0.00 0.00 - 1000.001.5 m 2.40 1.00 22.00 100.00 2200.00 22.00 155.51 31.10 186.61 6 1000.003 m 2.40 1.00 34.00 100.00 2920.00 29.20 206.40 72.38 278.78 4 1000.00

4.5 m 2.40 1.00 46.00 100.00 2920.00 29.20 206.40 113.66 320.07 4 1000.006 m 2.40 1.00 58.00 100.00 2920.00 29.20 206.40 154.94 361.35 3 1000.00

7.5 m 2.40 1.00 70.00 100.00 2920.00 29.20 206.40 196.22 402.63 3 1000.009 m 2.40 1.00 82.00 100.00 2920.00 29.20 206.40 237.50 443.91 3 1000.00

10.5 m 2.40 1.00 94.00 100.00 2920.00 29.20 206.40 278.78 485.19 3 1000.00

12 m 2.40 1.00 106.00 100.00 2920.00 29.20 206.40 320.07 526.47 2 1000.0013.5 m 2.40 1.00 118.00 100.00 2920.00 29.20 206.40 361.35 567.75 2 1000.0015 m 2.40 1.00 130.00 100.00 2920.00 29.20 206.40 402.63 609.03 2 1000.00

16.5 m 2.40 1.00 142.00 100.00 2920.00 29.20 206.40 443.91 650.31 2 1000.0018 m 2.40 1.00 154.00 100.00 2920.00 29.20 206.40 485.19 691.59 2 1000.00

l=loose, m=medium,

d=denseCritical Depth

Friction Coefficient

Vertical Effective Stress

BearingCapacityFactor

UltimateBase

Pressure

Ultimate Shaft

FrictionUltimate

Base LoadUltimate

Shaft Load

TotalAllowable

Load

No. ofPiles

RequiredDesign

Capacityfb

fs

Qb

Qs

Qall

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PILE DESIGN

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0 2 4 6 8 10 12 14 16 18 200.00

200.00

400.00

600.00

800.00

1000.00

1200.00

LOAD VERSUS EMBEDDED LENGTH

Ulimate Base Load

Ultimate Shaft Load

Allowable Total Load

Design Load

Depth (m)

Lo

ad

(k

N)

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Tables from AS2159

Non-Cohesive Soils

End-bearing Shaft Friction

F=fn(sand & pile Types)

Sand Sand FDriven Bored Driven Bored

Loose 6 60 25 Loose 6 0.8 0.3Medium 8 100 60 Medium 8 1 0.5Dense 15 180 100 Dense 15 1.5 0.8

Cohesive Soils

End-bearing Shaft Adhesion

L/d 0 6.3 0 11 7.6 10 12 8.3 20 13 8.8 30 14 9 40 1

50 0.91260 0.78370 0.70280 0.62190 0.564

100 0.516110 0.477120 0.443130 0.413140 0.388150 0.37160 0.354170 0.339180 0.33190 0.321200 0.319

qb='

vbN

qf

s'

vbF

Nq=fn(sand & pile types)

zl/d N

qz

l/d

qe=9S

u if L/d>4 f

s=S

u

qe=N

cS

u if L/d<=4 = fn(S

u)

Nc

su

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Clays

m #VALUE! #VALUE! #VALUE! #VALUE! Err:502 2.40 0.00 0.00 6.3m #VALUE! #VALUE! #VALUE! #VALUE! Err:502 2.40 2.00 3.00 8.3m #VALUE! #VALUE! #VALUE! #VALUE! Err:502 2.40 2.00 3.00 8.3m #VALUE! #VALUE! #VALUE! #VALUE! Err:502 2.40 2.00 3.00 8.3m #VALUE! #VALUE! #VALUE! #VALUE! Err:502 2.40 2.00 3.00 8.3

75 70 80 0.702 0.621 0.6615 2.40 2.00 3.00 8.3m #VALUE! #VALUE! #VALUE! #VALUE! Err:502 2.40 2.00 3.00 8.3m #VALUE! #VALUE! #VALUE! #VALUE! Err:502 2.40 2.00 3.00 8.3m #VALUE! #VALUE! #VALUE! #VALUE! Err:502 2.40 2.00 3.00 8.3m #VALUE! #VALUE! #VALUE! #VALUE! Err:502 2.40 2.00 3.00 8.3m #VALUE! #VALUE! #VALUE! #VALUE! Err:502 2.40 2.00 3.00 8.3m #VALUE! #VALUE! #VALUE! #VALUE! Err:502 2.40 2.00 3.00 8.3m #VALUE! #VALUE! #VALUE! #VALUE! Err:502 2.40 2.00 3.00 8.3

0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A

Su Interpolation for

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0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A

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0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A0 -10 10 #N/A 1 Err:502 0.00 -1.00 1.00 #N/A

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6.3 6.38.8 8.58.8 8.58.8 8.58.8 8.58.8 8.58.8 8.58.8 8.58.8 8.58.8 8.58.8 8.58.8 8.58.8 8.57.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:502

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7.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:502

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7.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:5027.6 Err:502


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