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Pile Foundation Design: A Student Guide

Ascalew Abebe & Dr Ian GN Smith
School of the Built Environment, Napier University, Edinburgh

(Note: This Student Guide is intended as just that - a guide for students of civil engineering.
Use it as you see fit, but please note that there is no technical support available to answer any questions about the guide!)

There are many texts on pile foundations. Generally, experience shows us that undergraduates find most of these texts complicated and difficult to understand.
This guide has extracted the main points and puts together the whole process of pile foundation design in a student friendly manner.
The guide is presented in two versions: text-version (compendium from) and this web-version that can be accessed via internet or intranet and can be used as a supplementary self-assisting students guide.

Introduction to pile foundations
Pile foundation design
Load on piles
Single pile design
Pile group design

Installation-test-and factor of safety
Pile installation methods
Test piles
Factors of safety

Chapter 1 Introduction to pile foundations
1.1 Pile foundations

1.2 Historical
1.3 Function of piles
1.4 Classification of piles
1.4.1 Classification of pile with respect to load transmission and functional behaviour 1.4.2 End bearing piles
1.4.3 Friction or cohesion piles
1.4.4 Cohesion piles
1.4.5 Friction piles
1.4.6 Combination of friction piles and cohesion piles
1.4.7 .Classification of pile with respect to type of material 1.4.8 Timber piles
1.4.9 Concrete pile
1.4.10 Driven and cast in place Concrete piles
1.4.11 Steel piles
1.4.12 Composite piles
1.4.13 Classification of pile with respect to effect on the soil 1.4.14 Driven piles
1.4.15 Bored piles
1.5 Aide to classification of piles
1.6 Advantages and disadvantages of different pile material
1.7 Classification of piles - Review

Chapter 2 Load on piles
2.1 Introduction
2.2 Pile arrangement

Chapter 3 Load Distribution
3.1 Pile foundations: vertical piles only
3.2 Pile foundations: vertical and raking piles
3.3 Symmetrically arranged vertical and raking piles
3.3.1 Example on installation error

Chapter 4 Load on Single Pile
4.1 Introduction
4.2 The behaviour of piles under load
4.3 Geotechnical design methods
4.3.1 The undrained load capacity (total stress approach)
4.3.2 Drained load capacity (effective stress approach)
4.3.3 Pile in sand
4.4 Dynamic approach

Chapter 5 Single Pile Design
5.1 End bearing piles
5.2 Friction piles
5.3 Cohesion piles
5.4 Steel piles
5.5 Concrete piles
5.5.1 Pre-cast concrete piles
5.6 Timber piles (wood piles)
5.6.1 Simplified method of predicting the bearing capacity of timber piles

Chapter 6 Design of Pile Group
6.1 Bearing capacity of pile groups
6.1.1 Pile group in cohesive soil
6.1.2 Pile groups in non-cohesive soil
6.1.3 Pile groups in sand

Chapter 7 Pile Spacing and Pile Arrangement

Chapter 8 Pile Installation Methods
8.1 Introduction
8.2 Pile driving methods (displacement piles)
8.2.1 Drop hammers
8.2.2 Diesel hammers
8.2.3 Pile driving by vibrating
8.3 Boring methods (non-displacement piles)
8.3.1 Continuous Flight Auger (CFA)
8.3.2 Underreaming
8.3.3 C.H.P

Chapter 9 Load Tests on Piles
9.1 Introduction
9.1.1 CRP (constant rate of penetration)
9.1.2 MLT, the maintained increment load test

Chapter 10 Limit State Design
10.1 Geotechnical category GC 1
10.2 Geotechnical category GC 2
10.3 Geotechnical category GC 3
10.3.1 Conditions classified as in Eurocode 7
10.4 The partial factors γ m, γ n, γ Rd

Introduction to pile foundations
Objectives: Texts dealing with geotechnical and ground engineering techniques classify piles in a number of ways. The objective of this unit is that in order to help the undergraduate student understand these classifications using materials extracted from several sources, this chapter gives an...
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