ABSTRACT

CONTENTS 5.1 Introduction ....................................................................................................................... 179 5.2 Types of Foundations....................................................................................................... 180 5.3 Soil Pressure Distribution under Footings ................................................................... 183 5.4 Determination of the Size of Footing ............................................................................ 185

5.4.1 Shear Strength of Footings .................................................................................. 185 5.5 Strip or Wall Footings ...................................................................................................... 190 5.6 Combined Footings .......................................................................................................... 196 5.7 Pile Foundations ............................................................................................................... 205

5.7.1 Analysis of Pile Groups ....................................................................................... 205 5.8 Design of Grade Beams ................................................................................................... 212 5.9 Structural Design of Drilled Shafts................................................................................ 214

5.9.1 Behavior of Drilled Shafts under Lateral Loads.............................................. 215 5.9.2 Methodology for Design of Drilled Shafts ....................................................... 215

5.9.2.1 Brom’s Method of Design ................................................................... 216 References ................................................................................................................................... 233

Foundation substructures are structural members used to support walls and columns to transmit and distribute their loads to the ground. If these loads are to be properly transmitted, the substructure must be designed to prevent excessive settlement or rotation and to minimize differential settlement. In addition, it should be designed in such a way that the load bearing capacity of the soil is not exceeded and adequate safety against sliding and overturning is assured.