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US 4,064,702 AGranted
Apparatus for maintaining axial alignment between a drop hammer and a driven pile
AssigneeHollandsche Beton Groep N. V.
InventorJoost W. Jansz
Life of this patent
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AssigneeHollandsche Beton Groep N. V.
InventorJoost W. Jansz
Estimating the term…
A submersible pile driving apparatus includes a drop hammer 7 reciprocably mounted in a guideframe on vertical posts 8. Either the drop hammer or the guideframe is guided on cables 4 secured to a crossbar 5 attached to the pile 6, and the guideframe is suspended from the surface ship by a rigid column of tube sections 10 or the like to which the guideframe has been rigidly connected. The apparatus is provided with a guide sleeve 12 or 13 having a funnel-shaped mouth to center the pile during descent. The overall arrangement maintains even very long piles in a vertical position during driving, and prevents tilting or tipping at the pile head - drop hammer interface.
In an apparatus used in deep water pile driving having a pile lowered and driven into the seabed, the improvement comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
No related US applications are recorded in the indexed filing history.
Components for drivers inasmuch as not specially for a specific driver construction: scaffolds or supports for drivers
Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other
Placing by driving: power-driven drivers
Accessories for placing or removing piles or bulkheads , e.g. noise attenuating chambers: guide devices; Guide frames
Term ended 27 Dec 1994 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
This invention relates to an apparatus for driving a pile into the soil at a considerable depth under water, and features a ship provided with means for mounting and lowering a pile to be driven into the soil or sea bed, as well as a drop-hammer, which can be lowered upon or with said pile.
2. Description of the Prior Art
In the drawings:
FIG. 1 shows a side view, in partial cross-section, of a first embodiment of the invention, and
FIG. 2 shows a similar side view of a second embodiment of the invention.
Both Figures show a vessel 1 with crane 2 and winches 3 of the type which can exert a constant tension. From these winches cables 4 run to a cross-bar 5 from which a pile 6 has been suspended. With both embodiments the drop-hammer 7 has mobably been guided upon the vertical posts 8 of a guide-frame. These vertical posts 8 are rigidly mounted to the upper part 9 of the guide-frame, which upper part in its turn is rigidly mounted to a string of pipes 10, carrying at the upper end an eye 11 with which the string is suspended from the hoisting cable of a crane 2.
In the embodiment of FIG. 1 the drop-hammer 7 is, in addition to being guided upon the posts 8, also guided at both its top and bottom upon the cables 4, said cables being connected to the crossbar 5 which carries the pile. Such further guiding may be implemented by cable slides, roller shoes, etc. as known in the art.
In the embodiment of FIG. 2 the drop-hammer is guided in the frame on posts 8, and said frame itself is guided at its upper and lower ends upon the cables 4, said cables running to the crossbar 5, which has releasably been connected to the pile. With this embodiment the frame has been provided with a guide-sleeve 13, said sleeve being pushed over the upper end of the pile and holding the pile and frame in line with each other. If desired the drop-hammer 7 can be provided with a guide-sleeve 12, either alone, as shown in the embodiment of FIG. 1, or in combination with the guide-sleeve 13.