ABSTRACT
Figure 8.1 shows a worm's eye view of common applications of deep foundations where one high rise building is supported by belled caissons and another by piles bearing on, or socketed into the bedrock. In both these cases, the load is supported in a combination of side-wall shear and end bearing and the full length of the pier is utilized. Another application for drilled piers is to transfer the structural load to a specified depth by ensuring there is no side-wall shear developed. Figure 8.2 shows an example of this type of construction to transfer the building load in piers adjacent to the tunnel to a depth below the invert and avoid inducing stresses on to the tunnel lining. A similar application is shown in Fig. 1.2(c).
