FOUNDATION DESIGN CALCULATION PROCEDURE.

Introduction
The currently accepted hybrid approach to foundation design in the UK means that while bearing pressures are checked on a working stress basis, the foundation members are designed using limit-state methods. This often leads to confusion in the design of foundations though with some forethought and methodology in the superstructure design it is a relatively straightforward matter to establish the foundation loads in a format which can be used for both parts of the design process.

In the vast majority of cases the design method can be  simplified and this shall be looked at in detail first to establish the principle to be adopted. In addition a method for dealing with most foundation and loading types will also be introduced.

Definition of bearing pressures   The site investigation, laboratory analysis, established principles of soil mechanics, and most importantly the engineer’s own judgement are used to assess the allowable...

Calculation of applied bearing pressures   Figure 10.15 shows the typical example where the loading is axial and there is no variation in ground level or surcharge. While this simple example will cover a large proportion of...

Structural design of foundation members   This section covers the design of the foundation elements in terms of the structural resistance to the applied forces, but does not cover durability factors which are catered for by...

General design method   This section gives a general design method based on the previously described calculations which allows for a systematic design process.  Part 1: Calculation of bearing pressures for...

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