BALLASTED DRIVEN PILE
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United States of America Patent
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N/A
Issued Date -
Mar 11, 2010
app pub date -
Sep 9, 2008
filing date -
Sep 9, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A driven pile anchor suitable for securing a tendon of a tension leg platform to the seafloor is supplemented with added weight. The pile may be a conventional driven friction pile installed with an underwater pile hammer. A load frame is added to the individual pile to accommodate ballast weights. Pre-manufactured ballast weights are placed on the frame to increase the holding power of the pile anchor system. The ballast weights may be secured solely by gravity connections, thereby simplifying their installation. In a second embodiment, the pile is intentionally plugged and installed with the plug intact. Pre-manufactured ballast weights are then placed inside the pile and may be held in place by gravity. In a third embodiment, the pile is a conventional driven friction pile installed with an underwater pile hammer. The pile is initially open but subsequently evacuated and intentionally plugged near its pile tip. Pre-manufactured ballast weights are placed inside the pile to increase its holding capacity. The first embodiment may be practiced in conjunction with either the second or third embodiment. The first embodiment may be retrofitted to existing, driven-pile anchor systems.
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