Rapid advances in piling technology have made piling on many sites a viable alternative economic proposition and not necessarily a last resort. The reduction in piling costs has also made possible the use of land which previously was considered unsuitable for building. The authors’ practice, for example, economically founded a small housing estate on a thick bed of peat by the use of 20 m long piles to support the low-rise domestic housing. Consideration should also be given to the use of piles on contaminated sites where driven piles can be economic as they do not produce arisings that would otherwise need to be disposed of off site at great cost. Typical examples of piling are shown in Fig. 1.8.
Fig. 1.8 Piled Foundations - Typical Examples.