JP3968030B2 - Underground suction anchor assembly - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an anchor assembly disposed in water, and more particularly to an underground suction anchor assembly disposed on a sea floor.
[0002]
[Prior art]
In general, in order to dispose a landfill-type anchor having a large holding force on the sea bottom, first, after excavating the sea bottom, the anchor is positioned, and then a method of performing restoration on the anchor is used.
As another method, after the anchor is attached to the lower stage of the pile, the pile is pulled down from the barge and brought into contact with the bottom of the sea, and the anchor is penetrated into the sea bottom by rotating the pile. There is something to do.
[0003]
[Problems to be solved by the invention]
In the conventional method of excavating the bottom of the sea and installing anchors, the bottom of the sea has to be excavated and further restored, so that there is a problem that water is contaminated in the process, resulting in environmental pollution. It was.
In addition, the method of rotating the pile and placing it on the bottom of the sea by penetrating anchors can be used in shallow water areas, but the pile cannot be brought into contact with the sea floor in deep water areas. The method has a limitation that it cannot be used.
The present invention has been made in view of the problems of the prior art, and an object of the present invention is to provide an anchor having a structure that can be easily disposed on the sea bottom even in deep water areas. It is.
[0004]
[Means for Solving the Problems]
In the present invention, in order to achieve the above-described object, a pipe communicating with a marine pump is provided in the upper stage portion, and the water flowing into the inside through the pipe is discharged to discharge the bottom of the seabed. A suction pile that enters; a wire is connected to the outer periphery, and is detachably coupled to the suction pile. When the suction pile enters the bottom of the sea, it enters and enters the bottom of the sea and is fixed to the bottom of the sea. And an anchor that is separated from the suction pile and is located on the sea floor; and is attached to a lower step of the suction pile so as to be positioned between the suction pile and the anchor, and the inside of the suction pile and the suction The upper part of the anchor is tightened by the hydraulic pressure supplied through the hydraulic pipe that communicates with the offshore hydraulic system through the upper part of the pile. A hydraulic jack that detachably couples the anchor and the suction pile by attaching or releasing it; and the anchor is inserted into the seabed at a predetermined depth, and the hydraulic jack is An underground suction anchor assembly is provided that is separated from the suction pile upon operation and resides on the sea floor.
[0005]
As a specific embodiment, an insertion extension portion is formed in the upper stage portion of the anchor; the hydraulic jack includes a pair of substantially semicircular arc arms surrounding the insertion extension portion, and the arc shape by hydraulic pressure. A hydraulic cylinder capable of moving the arm inward or outward, and a fastening member for fastening or releasing the arm; a cylindrical external vertical wall; and the insertion and extension formed with a predetermined width at a lower stage of the external vertical wall A housing in which the fastening member is located, comprising a bottom portion in which an extending portion insertion hole is formed, and an internal vertical wall against which the extending portion extending vertically upward from the bottom portion is pressed And the hydraulic jack extends upward through the insertion hole formed in the bottom of the housing member. Releasing it or pressed against the inner vertical wall by releasing it or tighten the arm of wood, coupling or separating the said anchor suction pile.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment according to the present invention will be described below in detail with reference to the accompanying drawings.
1a and 1b are an exploded perspective view and an assembled perspective view of an underground suction anchor according to an embodiment of the present invention, respectively, and FIG. 2 is a cross-sectional view of the underground suction anchor according to an embodiment of the present invention. FIG. 3a to 3d are schematic views showing a state in which an underground suction anchor according to an embodiment of the present invention is disposed.
In the underground suction anchor assembly according to the present invention, the anchor 40 is connected to the lower step portion of the suction pile 10 with a hydraulic jack, and is inserted into the seabed. When the anchor 40 is completely disposed on the seabed, The suction pile 10 is separated from the anchor 40. As a result, the suction pile 10 separated from the anchor 40 can be reused.
[0007]
The suction pile 10 has been developed so that it can be arranged on the bottom of the sea in the deep sea. The inside of the suction pile 10 has a hollow shape, and an upper stage of the suction pile 10 includes a pump. A pipe (not shown) communicates with a pump provided in a marine vessel or the like. When the pump is operated to suck up the water flowing into the suction pile 10, the suction pile 10 enters the bottom of the sea. Techniques relating to the suction pile 10 are disclosed in publicly known documents such as US Pat. No. 6,227,138 and International Patent Application WO9922983. In the present invention, the suction pile 10 is used. Therefore, description of the specific configuration and operating principle of the suction pile 10 is omitted.
[0008]
The hydraulic jack is attached to the lower part of the suction pile 10 so as to be positioned between the suction pile 10 and the anchor 40, and the anchor 40 and the suction pile 10 are coupled or separated by operating the hydraulic jack.
[0009]
The hydraulic jack includes a pair of arc-shaped arms 22 and a hydraulic cylinder 23, and the arm 40 is tightened or released by the operation of the hydraulic cylinder 23 to make the anchor 40 and the suction pile 10 separable. A fastening member 26; and a cylindrical housing member 30 that forms an installation space for the fastening member 26.
[0010]
As shown in FIG. 1a, the housing member 30 includes a cylindrical external vertical wall 35 having a threaded portion 34 formed on the inner peripheral surface, and a central portion extending horizontally below the external vertical wall 35 with a predetermined width. And a cylindrical inner vertical wall 33 extending vertically upward from the bottom 36 along the circumference of the inner hole 37.
[0011]
Accordingly, one side of the cross section of the housing member 30 is formed in a “U” shape by the outer vertical wall 35, the bottom 36 and the inner vertical wall 33. A screw portion 11 is formed on the outer peripheral surface of the lower step portion of the suction pile 10 to be screwed with the screw portion 34 of the housing member 30. The housing member 30 is screwed to the lower step portion of the suction pile 10. The In the bottom portion 36 of the housing member 30, a number of extending portion insertion holes 32 are formed in the vicinity of the lower portion of the internal vertical wall 33 through which an insertion extending portion 41 formed in the upper stage of an anchor 40 described later is inserted. . When the insertion extending portion 41 of the anchor 40 that extends upward through the extending portion insertion hole 32 is tightened by the tightening member 26, the inner vertical wall 33 is pressed against the insertion extending portion 41. (See FIG. 2). On the other hand, a pair of fixing protrusions 31 are provided on one side of the bottom portion 36 of the housing member 30.
[0012]
The fastening member 26 includes a pair of arc-shaped belts 22 and a hydraulic cylinder 23 to which one end of the arms is connected. The other end of the fastening member 26 is connected to the housing member 30. A fixing hole 21 through which the formed fixing protrusion 31 is inserted is formed. After the fixing protrusion 31 is inserted into the fixing hole 21, the tightening 26 is attached to the housing member 30 by screwing with the screw member 25.
[0013]
The hydraulic cylinder 23 moves the arm 22 by the action of hydraulic pressure to tighten or release the tightening member 26. That is, due to the action of the hydraulic cylinder 23, the size of the diameter of the circle formed by the two arms 22 increases or decreases (see FIG. 2).
[0014]
The hydraulic cylinder 23 communicates with a hydraulic device (not shown) provided in a marine vessel or the like via a hydraulic pipe 24 that passes through the inside of the suction pile 10. When the suction pile 10 enters the bottom of the sea, the hydraulic pipe 24 may be damaged. Therefore, the hydraulic pipe 24 passes through the inside of the suction pile 10 and is connected to an offshore hydraulic device. When the hydraulic pressure from the hydraulic device is applied to the hydraulic cylinder 23 through the hydraulic pipe 24, the hydraulic cylinder 23 operates.
[0015]
The anchor 40 has a cylindrical shape as shown in FIGS. 1a and 2. A plurality of insertion extending portions 41 are formed at the upper end of the anchor 40, and the insertion extending portions 41 are inserted through the extending portion insertion holes 32 formed in the bottom portion 36 of the housing member 30, so that the housing The member 30 extends upward in parallel with the internal vertical wall 33 of the member 30 with a slight gap. A large number of flanges 42 are provided on the outer peripheral surface of the anchor 40 in order to improve the holding force of the anchor 40. Further, the other end of the wire 43 whose one end is connected to the floating float at sea is fixedly connected to the outer peripheral surface of the anchor 40.
[0016]
Hereinafter, with reference to FIGS. 1 to 3, a process of disposing an anchor on the sea floor using an underground suction anchor assembly according to the present invention will be described.
With the fastening member 26 positioned inside the housing member 30, the housing member 30 is screwed to the lower step portion of the suction pile 10, so that the hydraulic jack is fixed to the lower step portion of the suction pile 10. The hydraulic pipe 24 for operating the hydraulic jack passes through the inside of the suction pile 10 and is connected to a hydraulic device provided in a marine vessel or a marine crane (see FIG. 3). The suction pile 10 is maintained in a vertical state by a marine crane located on the sea. A pipe (not shown) for discharging water that has flowed into the suction pile 10 to the outside of the suction pile 10 is provided at the upper stage of the suction pile 10. The water that has flowed into the suction pile 10 through the pipe is discharged to the outside by the operation of the pump located on the sea.
[0017]
The anchor 40 is detachably coupled to the suction pile 10 by a hydraulic jack in the following manner. A number of insertion extending portions 41 formed in the upper stage portion of the anchor 40 pass through the extending portion insertion holes 32 formed in the bottom portion 36 of the housing member 30. The insertion extending portion 41 inserted through the extending portion insertion hole 32 extends upward in parallel with the internal vertical wall 33 of the housing member 30 with a slight gap. When the hydraulic cylinder 23 of the clamping member 26 provided in the hydraulic jack is actuated by the hydraulic pressure of the hydraulic device and the arms 22 on both sides of the clamping member 26 can be moved inward, it extends upward alongside the internal vertical wall 33. The inserted and extending portion 41 is pressed against the internal vertical wall 33. In this way, the insertion extending portion 41 is fastened by the fastening member 26, and as a result, the anchor 40 is attached to the lower step portion of the suction pile 10.
[0018]
In this way, in a state where the anchor 40 is attached to the lower part of the suction pile 10 with a hydraulic jack, the suction pile 10 is lowered using a marine crane so that the anchor 40 hits the bottom of the sea. When the water inside the suction pile 10 is discharged to the outside by the pump, the suction pile 10 enters the sea bottom together with the anchor 40. When the anchor 40 enters a predetermined depth into the sea floor, the hydraulic jack is operated to separate the suction pile 10 and the anchor 40 from each other.
[0019]
That is, when the hydraulic cylinder 23 is operated by the hydraulic pressure of the hydraulic device and the arm 22 of the tightening member 26 is moved outward to release the tightening state of the insertion extending portion 41, the insertion extension pressed against the internal vertical wall 33. The protruding portion 41 is in a state where it can be removed from the extended portion insertion 32 of the bottom portion 36.
Thus, when the tightening state of the suction pile 10 and the anchor 40 is released, the suction pile 10 is pulled up, and the suction pile 10 is completely separated from the anchor 40 entering the sea bottom.
By connecting the other end of the wire 43 whose one end is connected to the outer peripheral surface of the anchor 40 to the floating float 60 at the sea, the anchor 40 functions to fix the floating position of the floating 60.
[0020]
【The invention's effect】
As described above, according to the present invention, when the anchor 40 is separably coupled to the lower part of the suction pile 10 and then the anchor 40 enters the sea bottom and is fixed, the suction pile 10 and the The anchor 40 can be separated and the anchor 40 can be permanently placed on the sea floor. Therefore, the process of disposing the anchor 40 on the sea bottom can be performed very easily.
[0021]
In particular, since there is no need to excavate or restore the sea floor during the anchor 40 installation process, it is possible to prevent the occurrence of environmental pollution.
Further, since the anchor is not disposed by rotating the pile but is disposed by the suction method, the anchor 40 can be easily disposed even in the deep sea.
[0022]
Furthermore, since the suction pile 10 and the hydraulic jack are separated and pulled up from the anchor 40 after the anchor 40 is disposed, they can be reused, and as a result, the construction cost can be reduced.
In the drawing, it is shown that the suction pile 10 is lowered using a ship, but this is only an example, and a barge, a marine crane, or the like can be used in addition to a regular ship.
[Brief description of the drawings]
1A is an exploded perspective view and an assembled perspective view of an underground suction anchor according to an embodiment of the present invention. FIG.
FIG. 1b is an exploded perspective view and an assembled perspective view of an underground suction anchor according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of an underground suction anchor according to an embodiment of the present invention.
FIGS. 3a to 3d are schematic views showing a process of disposing an underground suction anchor according to an embodiment of the present invention. FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Suction pile 11 Screw part 22 Arm 23 Hydraulic cylinder 24 Hydraulic pipe 26 Tightening member 30 Housing member 32 Extension part insertion hole 33 Internal vertical wall 35 External vertical wall 36 Bottom part 40 Anchor 41 Insertion extension part

Claims (1)

In an anchor assembly for disposing an anchor on the sea floor,
A pipe that communicates with a pump on the sea is provided in the upper stage, and a suction pile 10 that enters the sea bottom by discharging water flowing into the inside through the pipe,
A wire 43 is connected to the outer periphery, and is detachably coupled to the suction pile 10. After the suction pile 10 enters the bottom of the sea, it enters and is fixed to the bottom of the sea and is fixed to the bottom of the sea. Is an anchor 40 separated from the suction pile 10 and placed on the sea floor;
It is attached to the lower part of the suction pile 10 so as to be positioned between the suction pile 10 and the anchor 40, and communicates with the hydraulic device at sea through the inside of the suction pile 10 and through the upper part of the suction pile 10. A hydraulic jack that detachably couples the anchor 40 and the suction pile 10 by tightening or releasing the upper portion of the anchor 40 with hydraulic pressure supplied through a hydraulic pipe
The anchor 40 is separated from the suction pile 10 by operating the hydraulic jack in a state where the anchor 40 enters a predetermined depth on the sea floor, and is placed on the sea floor .
An insertion extension 41 is formed on the upper stage of the anchor 40,
The hydraulic jack is
A clamping member that includes a pair of arc-shaped arms 22 that surround the insertion / extension portion 41 and a hydraulic cylinder 23 that can move the arc-shaped arms 22 inward or outward by hydraulic pressure, and tightens or releases the arms 22. 26 and;
A cylindrical outer vertical wall 35, a bottom portion 36 having a predetermined width formed in a lower stage of the outer vertical wall 35, and an extending portion insertion hole 32 through which the insertion extending portion 41 is inserted, and an upper portion from the bottom portion 36. And an inner vertical wall 33 against which the insertion extending portion 41 extending perpendicularly toward the housing is pressed, and the housing member 30 in which the fastening member 26 is located,
The hydraulic jack fastens or releases the arm 22 of the fastening member 26 with the insertion extending portion 41 extending upward through the insertion hole 32 formed in the bottom portion 36 of the housing member 30. The underground suction anchor assembly is characterized in that the anchor 40 and the suction pile 10 are joined or separated by pressing against or releasing the inner vertical wall 33 .

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