Theory and Practice of Pile Foundations

Theory and Practice of Pile Foundations

Piles, as a popular foundation type, are frequently used to transfer super-
structure load into subsoil and stiff-bearing layer and to transfer impact of

surcharge owing to soil movement and/or lateral force into underlying lay-
ers. They are installed to cater for vertical, lateral, and/or torsional loading

to certain specified capacity and deformation criteria without compromis-
ing structural integrity. They are conventionally made of steel, concrete,

timber, and synthetic materials

We attempt to devise design methods that require fewer parameters
but resolve more problems. This has yielded a systematic approach to

model pile response in the context of load transfer models. This is sum-
marized in this book of 13 chapters. Chapter 1 presents an overview

of estimating soil shear modulus and strength using the conventional

standard penetration tests and cone penetration tests. Chapter 2 pro-
vides a succinct summary of typical methods for estimating bearing

capacity (including negative skin friction) of single piles and pile groups.

Chapter 3 recaptures pile–soil interaction models under vertical, lat-
eral, or torsional loading. Chapters 4 and 5 model the response of verti-
cally loaded piles under static and cyclic loading and time-dependent

behavior, respectively. The model is developed to estimate settlement
of large pile groups in Chapter 6. A variational approach is employed
to deduce an elastic model of lateral piles in Chapter 7, incorporating

typical base and head constraints. Plastic yield between pile and soil (pu-
based model) is subsequently introduced to the elastic model to capture

a nonlinear response of rigid (Chapter 8) and flexible piles (Chapter 9)

under static or cyclic loading. Plastic yield (hinge) of pile itself is fur-
ther incorporated into the model in Chapter 10.


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