Foundation DesignChapter 8

Introduction

Foundation is a part of structure whichinterfaces the superstructure to theadjacent zone of soil or rock below it.

The purpose of having a foundation is totransfer the superstructure loads to theunderlying soil or rock withoutoverstressing the soil or rock.

Introduction

The three basic requirements of asatisfactory foundation.◦ The foundation must be properly located with

respect to any future influences which couldaffect its performances.◦ The foundation, including the soil below it,

must be stable and safe from failure.◦ The foundation must not settle sufficiently to

damage the structure.

Types of Foundation

Shallow Foundation◦ Shallow foundations are used to transmit the

loads of the superstructure to the adjacentsoil below it. The types of shallow foundationavailable are pad foundation, strip foundationand raft foundation.

Deep Foundation

Deep foundations are used to transferthe structural loads to a deeper soil strataand when the soils are subjected to scour.

The different types of deep foundationsavailable are:◦ piles,◦ piers and◦ caissons.

Pad Foundation Design

Pad Footing

Pad Footing

Pad Footing

Pad Footing

Pad Footing

Pad Footing