01 July 1997
The figure slows typical cushion configurations for both air/steam and
diesel hammers. Pile cushion is only included in concrete and plastic
piling; with steel and wood piling, no pile cushion is normally needed.
In some instances, no hammer cushion is required. Some hydraulic
hammers have no hammer cushion. With wood piling, some air/steam
hammers can be equipped with special bases to drive wood piling
without cushion material.
The air/steam configuration to the left is shown with an integrally cost
cushion pot. Most air/steam hammers can use as an alternative a
capblock follower or shield, where micarta and aluminum cushion
material is stacked into a piece separate from the pile cap. Such a
configuration is shown in the below right figure.
Figure 3-15. Cushion configurations.