Chapter 2.13 Foundations
Any structure, from domestic to multi-storey, must be supported by the ground beneath.The interaction of geotechnics and structure cannot be avoided. Although modern construction involves geotechnical engineers almost universally, structural engineers must have a good understanding of geotechnics. This chapter reviews simple pad and strip foundations, piles, rafts and finishes with some methods of assessing retaining walls.
Foundations and substructures also provide interesting and difficult challenges, not only in selecting the ‘right’ solution but in the construction sequences, which can have major influence on project costs.
Retaining Wall Base – Eccentricity Outside Middle Third
Sliding resistance and overturning resistance would need to be re-evaluated, taking into account the increased lateral pressure, as illustrated in figure 2.13.10.
In the following pages, ignoring the sliding resistance, the increased bearing pressure is used to calculate conservatively steel reinforcement needed in the base.