15

Shallow Foundations

CHAPTER HIGHLIGHTS

Design criteria – Types of shallow foundations – Selection of type of foundation – Location and depth of foundation – Settlement of shallow foundation – Design considerations for a shallow foundation – Proportioning of combined footing – Mat foundation

15.1 INTRODUCTION

Structural foundations may be grouped under two broad categories – shallow foundations and deep foundations. This classification indicates the depth of foundation installation. A shallow foundation is one which is placed on a firm soil near the ground, and beneath the lowest part of the superstructure. A deep foundation is one which is placed on a soil that is not firm, and which is considerably below the lowest part of the superstructure. ...

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