Hydraulic and earth engineering – Marine structure or fabrication thereof – With anchoring of structure to marine floor
Patent
1998-07-30
2000-10-10
Lillis, Eileen D.
Hydraulic and earth engineering
Marine structure or fabrication thereof
With anchoring of structure to marine floor
175 5, 175 10, 73 1103, 173DIG1, B25D 904, B25D 914, E02D 902, E02D 1100, G01N 334
Patent
active
06129487&
ABSTRACT:
A tool is provided for use in submerged condition for installing anchor or foundation elements such as piles in a ground formation that is submerged under a body of water. A hammer body is fixedly supported in axial alignment with the head of a pile that is to be driven and carries a reaction body guided for movement thereon in a direction that is axial to the pile. The hammer body and reaction body define opposed first and second ends of an expansion chamber. A pyrotechnic charge is initiated to create a rapidly expanding volume of high pressure gas in the expansion chamber to generate a downwards pressure force pulse to drive the pile, an equal and opposite upwards pressure force pulse being applied to the reaction body. Damping structure operatively associated with the reaction body interacts with the water in which the tool is submerged using the inertia of the water to resist upwards movement of reaction body.
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Bermingham Patrick
Janes Matthew
Jonker Geert
Middendorp Peter
Bermingham Construction Limited
Lillis Eileen D.
Mayo Tara L.
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