Civil Engineering Reference
In-Depth Information
Runners
Hammer
Precast pile
Fig. 10.2
Pile driving rig.
creosoting is the usual method of protection. Much of central Amsterdam is constructed on timber piles
where the groundwater table is very close to the ground surface.
Steel piles: Tubular, box or H-section
These are suitable for handling and driving in long lengths. They have a relatively small cross-sectional
area and penetration is easier than with other types. The risk from corrosion is not as great as one might
think although tar coating or cathodic protection can be employed in permanent work.
Jetted pile
When driving piles in non-cohesive soils the penetration resistance can often be considerably reduced by
jetting a stream of high-pressured water into the soil just below the pile. There have been cases where
piles have been installed by jetting alone. The method requires considerable experience, particularly when
near to existing foundations.
Jacked pile
Generally built up with a series of short sections of precast concrete, this pile is jacked into the ground
and progressively increased in length by the addition of a pile section whenever space becomes available.
