TUBULAR STEEL PILE (low vibration level)
|The tubular steel pile is the type of
pile most often used when the working space is confined. The pile is built up of tubular
steel sections welded together in situ. There is a gravel plug in the first tubular
section. A drop hammer falls on to this gravel plug. The tube itself forms a leader for
the hammer. When the tube is at the right depth, it is cut off at the correct height and
filled with concrete and a reinforcing cage is fitted over the top few metres. It is
possible to provide the pile with an enlarged base plate or an enlarged base made of
reinforced concrete or to make an enlarged base after driving in the pile.
The tubular steel pile is extremely suitable for working inside existing buildings, or in small access openings. Depending on the type of work to be carried out, the dimensions of the pile and the soil conditions, it is possible to use very small dismountable machines on wheels (see photograph below) which can go through very narrow openings up to heavy machines mounted on crawler tracks (see photograph above).
|Since the mass of a tubular steel pile is much less than that of a concrete pile of the same size, a fairly light drop hammer is sufficient. As a result the vibration level in tubular steel piles is in proportion lower.|
APPLICATIONS OF TUBULAR STEEL PILES:
Subject to alteration