Pile Capacity

Date Printed:2/26/2013

Page 1

JACE Ltd.

2. Design Criteria gf (Bearing) gf (Shaft) gf (Overall) 3. Soil Bulk unit weight Depth to water table Starting depth of: Depth increments of: Total Length of Pile:

2.50 2.50 2.50

Load (kN)

Company: Address: Turners Yard, School Street, Farsley LEEDS, West Yorks, UK Project: Client: Design Input Value 700 1. Pile Pile type Boared Shaft Dia. or width 450 mm 600 Base Dia. or width 450 mm Shape Round 500 Design Load 635 kN

Tel: 07890 278110 LS28 5EX

DESIGN OF PILES BASED ON LOAD CAPACITY Made by

Date

J.J.MAC Element:

December 12, 2004

Page No 1

Checked

Revision A

Job No

Load Vs Embedded Length

400

Ulimate Base Load

Ultimate Shaft Load

300

Allowable Total Load

18 kN/m³ 3.00 m 0.80 m 0.50 m 7.30 m

200

Design Load 100

0 0

1

2

3

4

5

6

7

Depth (m)

4. Computation Table Type

Effective Depth L (m) 0 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50

L=Loose Critical Friction e Depth Coefficient ohesiv M=Mediu C n No m D=Dense (m) F Undrained Embedmen Adhesion Coefficient Shear t Ratio sive Cohe Strength (ZL) a Non-Cohesive L, M, D (m) Su (kN/m²) Cohesive ZL Cohesive 10 0.00 1.00 Cohesive 10 1.11 1.00 Non-Cohesive l 2.70 0.30 Non-Cohesive l 2.70 0.30 Non-Cohesive l 2.70 0.30 Non-Cohesive l 2.70 0.30 Non-Cohesive l 2.70 0.30 Cohesive 40 7.78 1.00 Non-Cohesive l 2.70 0.30 Non-Cohesive l 2.70 0.30 Non-Cohesive l 2.70 0.30 Non-Cohesive l 2.70 0.30 Non-Cohesive l 2.70 0.30 Non-Cohesive l 2.70 0.30

Max Nc

Bearing Capacity Factor Nc Bearing Capacity Factor Nq

(kPa) 9.000 9.000 18.000 27.000 36.000 45.000 54.000 9.000 62.000 66.000 70.000 74.000 78.000 82.000

(kPa) 6.30 7.68 25.00 25.00 25.00 25.00 25.00 9.00 25.00 25.00 25.00 25.00 25.00 25.00

Vertical Effective Stress

Ultimate Base Pressure fb (kPa) 63.00 76.78 450.00 675.00 900.00 1125.00 1215.00 360.00 1215.00 1215.00 1215.00 1215.00 1215.00 1215.00

Ultimate Shaft Friction Ultimate Shaft Adhesion fs (kPa) 10.00 10.00 5.40 8.10 10.80 13.50 14.58 40.00 14.58 14.58 14.58 14.58 14.58 14.58

Total Ultimate Ultimate Allowable Base Load Shaft Load Load

Note: Greyed cells represent user input

This program considers the following cases: 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.

File: 131231405.xls.ms_office Tab: Calculations

Load Distribution Beneath a Rigid Pile Cap

Qb (kN) 10.02 12.21 71.57 107.35 143.14 178.92 193.24 57.26 193.24 193.24 193.24 193.24 193.24 193.24

Qs (kN) 0.00 7.07 10.89 16.61 24.25 33.79 44.09 72.37 82.67 92.98 103.29 113.59 123.90 134.20

Qall (kN) 4.01 7.71 32.98 49.59 66.95 85.08 94.93 51.85 110.36 114.49 118.61 122.73 126.85 130.98

No. of Piles Required

Design Capacity

159 83 20 13 10 8 7 13 6 6 6 6 6 5

(kN) 635 kN 635 kN 635 kN 635 kN 635 kN 635 kN 635 kN 635 kN 635 kN 635 kN 635 kN 635 kN 635 kN 635 kN

Non-Cohesive Soils End-bearing qb=s'vbNq Nq=fn(sand & pile types) Sand

zl/d

Loose Medium Dense

6 8 15

Shaft Friction fs=s'vbF F=fn(sand & pile Types) Nq Driven 60 100 180

Bored 25 60 100

Sand

zl/d

Loose Medium Dense

6 8 15

Cohesive Soils End-bearing qe=9Su if L/d>4 qe=NcSu if L/d<=4 L/d 0 1 2 3 4

Nc 6.3 7.6 8.3 8.8 9

Shaft Adhesion fs=aSu a = fn(Su) su 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180

a 1 1 1 1 1 0.912 0.783 0.702 0.621 0.564 0.516 0.477 0.443 0.413 0.388 0.37 0.354 0.339 0.33

F Driven 0.8 1 1.5

Bored 0.3 0.5 0.8