Splay bottom fluted metal piles
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United States of America Patent
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-
Aug 11, 1987
Grant Date -
N/A
app pub date -
Jul 2, 1986
filing date -
Jul 2, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A metal pile has a splayable fluted bottom portion, the perimeter of which is greater than the nominal perimeter of the pile. A fluted expansion cone is located in the interior of the pile and is connected to the splayable fluted bottom portion. The flutes of the bottom portion, as well as of the expansion cone, desirably have exterior and interior edges which are substantially straight and sides portions therebetween which are substantially planar. The expansion cone generally has an acute apex angle. Once the pile is in place in the earth, the splayable flutes bottom portion can be horizontally expanded to a much larger diameter by applying a force to the top of the expansion cone which flattens the cone and imparts a horizontal expansion force and causes the fluted bottom portion of the pile to splay. When the diameter of the bottom portion of the pile has been increased, the pile will have significantly improved load bearing capacity and thus reducing the depth of penetration otherwise normally required.
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