KR101388101B1 - Constructing method of underwater anchor using diamond wiring - Google Patents

Abstract

The present invention relates to a method of constructing an underwater anchor in the seabed ground, and particularly, to a method of constructing an underwater anchor in the seabed ground using diamond wiring excavation, which can fix and install a underwater anchor in the seabed ground after forming a pipe insertion part in the seabed ground using a diamond wire on which an industrial diamond is attached in order to insert an end portion of a tubular underwater anchor into the seabed ground. The method of constructing the underwater anchor in the seabed ground comprises the steps of: vertically perforating a plurality of vertical insertion holes (3) in the seabed ground; inserting a pair of guide frames (2), which respectively have diamond wires (1) traversing the frames, into the two neighboring vertical insertion holes (3), such that the diamond wires (1) cut the seabed ground located between the two vertical insertion holes (3) in which the guide frames (2) are inserted while doing a rectilinear motion so as to vertically form a plane insertion part (4) between the vertical insertion holes (3); repeating the perforation of the vertical insertion holes (3) and formation of the plane insertion parts (4) relative to the vertical insertion holes (3) so as to form a pipe insertion part (100) corresponding to the shape of a cross section of the underwater anchor (200) in the seabed ground; and inserting and arranging the bottom end portion of the underwater anchor (200) into the pipe insertion part (100), such that the underwater anchor (200) is installed in the seabed ground. [Reference numerals] (AA) Seabed; (BB) Insertion

Description

Constructing Method of Underwater Anchor using Diamond Wiring}

The present invention relates to a method for constructing a subsea anchor in a subsea ground, and specifically, an industrial cutting diamond is provided in a wire to insert an end portion of a tubular subsea anchor using a diamond wire to cut an object. The present invention relates to a "submarine anchor construction method using diamond wiring subsea ground excavation" of a configuration in which a subsea anchor is fixedly installed and constructed after being formed in the seabed.

Subsea anchors are used to fix subsea structures installed on the sea bottom to support tidal current generators or wind power generators. These subsea anchors are mainly composed of tubular members. The subsea anchors can be used as a foundation pile for supporting the sea structures located on the sea in addition to being used for fixing the sea structures to the sea floor.

The lower end of the subsea anchor should be fixed intrusive to the subsea ground. In the case of the subsea ground consisting of rock, conventionally, a method of drilling the subsea ground using a drill was used to fix the lower end of the subsea anchor. Korean Unexamined Patent Publication No. 10-2008-69999 (Patent Application No. 10-2008-7011524) discloses a technique for installing an anchor in the water using a perforator.

However, in the conventional technology of drilling the seabed ground using a drill and intruding and fixing the bottom of the bottom anchor to the drilled hole, the larger the diameter of the sea anchor is, the larger the diameter of the hole to be drilled requires. In addition to the increased cost, in order to prevent the collapse of the perforated holes, additional reinforcement of the perforated walls of the perforated holes is required, which is disadvantageous in that the construction is complicated and the construction cost is also high.

In particular, the subsea anchors often use hollow hollow members, i.e., pipe members. In the prior art by drilling, there is no choice but to perforate the holes to have an area corresponding to the diameter of the subsea anchors. As a result, there is a disadvantage in that it is necessary to dig even the seabed ground in the hollow position where there is no pipe member of the subsea anchor.

See Republic of Korea Patent Publication No. 10-2008-69999 (published Jul. 29, 2008).

The present invention was developed in order to overcome the disadvantages of the prior art by the above-mentioned drill drilling, in the installation of the pipe-shaped subsea anchors in the seabed ground, by drilling the whole hole corresponding to the cross-sectional size of the sea anchors by drilling By eliminating the need for large-scale drills, it provides an economical construction method that allows easy and solid penetration of subsea anchors on the undersea ground without the need for large-scale drills and without reinforcing the hollow walls of perforated holes. It aims to do it.

Furthermore, the present invention minimizes the excavation portion of the seabed ground needed to penetrate and fix the tubular bottom anchor to the seabed, thereby preventing the perforation of the portion of the seabed not necessary for the anchoring of the seabed anchor, and thus economically An object of the present invention is to provide a construction method of subsea anchors to allow construction.

In order to achieve the above object, in the present invention, to drill a plurality of vertical insertion hole vertically to the seabed ground surface; The guide frame is formed by inserting a pair of guide frames each having two rod members parallel to each other and having a diamond wire for cutting an object through a linear motion at the front end thereof, into two adjacent vertical insertion holes. The diamond wire cuts the seabed ground between the two inserted vertical insertion holes so as to vertically form the planar insertion portion between the vertical insertion holes; The insertion of the guide frame and the formation of the planar insertion portion by the diamond wire are repeated for the plurality of vertical insertion holes, and the penetration portion having the shape corresponding to the cross-sectional shape of the subsea anchor is formed by the vertical insertion hole and the planar insertion portion in the seabed. and; There is provided a construction method of a subsea anchor, characterized in that the seam anchor is installed on the sea bed by inserting the lower end of the sea anchor into the penetration part.

In the construction method of the present invention, after the lower end of the subsea anchor is inserted into the penetration part, the grout material is filled into the penetration part so that the subsea anchor is embedded in the grout material, or the lower end of the subsea anchor is inserted into the penetration part, and then expanded. The member may be positioned between the seabed base wall of the penetration and the subsea anchor and the expansion member may be inflated so that the lower end of the subsea anchor is secured to the penetration.

According to the present invention, since the penetration portion is formed in the subsea ground in advance in a form corresponding to the cross-sectional shape of the subsea anchor using the guide frame and the diamond wire, the subsea anchor is inserted into and fixed to the penetration portion. It is not necessary to drill a hole corresponding to the entire cross section of the subsea anchor by drilling, thus eliminating the need for a large drill by eliminating the drilling of the entire subsea anchor cross section. Cost savings and improved work efficiency can be achieved by using.

In particular, in the present invention, it is not necessary to drill a large-scale hole, so there is no need to perform the hollow wall reinforcement work of the punched hole, and thus it is possible to reduce the cost and time required for the hollow wall reinforcement work of the punched hole. The effect that construction is possible is exhibited.

Furthermore, in the present invention, the excavation site of the seabed ground required for the installation of the undersea anchor is minimized since the excavation is performed only in the form of the cross section of the seabed anchor against the seabed ground, thus preventing unnecessary drilling of the seabed ground portion. The cost can be reduced, thereby improving economic efficiency.

1 is a schematic perspective view illustrating a state in which an insertion portion is formed in a seabed ground and a bottom portion of a subsea anchor is penetrated by a construction method of a subsea anchor according to the present invention.
Figure 2 is a schematic perspective view showing a process of drilling a vertical insertion hole in the seabed ground in the construction method of the present invention.
Figure 3 is a schematic plan view showing a state in which the vertical insertion hole perforated in the seabed ground in the construction method of the present invention.
Figure 4 is a schematic perspective view following the state of Figure 3 showing a state in which the guide frame and the diamond wire is inserted into the vertical insertion hole in the construction method of the present invention.
5 is a schematic cross-sectional view taken along line AA of FIG. 4.
FIG. 6 is a schematic cross-sectional view corresponding to FIG. 5 showing that a guide frame is guided by an operator and inserted into a vertical insertion hole. FIG.
7 to 9 are schematic cross-sectional views corresponding to FIG. 5 sequentially showing a state in which the cutting of the subsea ground is performed while the guide frame is inserted into the vertical insertion hole according to the construction method of the present invention.
10 is a schematic perspective view showing a state in which the lower end of the subsea anchor is penetrated into the penetration unit according to the construction method of the present invention.
FIG. 11 is a schematic cross-sectional view taken along the line BB of FIG. 10 showing a state where the lower end portion of the subsea anchor is penetrated into the penetration portion subsequent to the state of FIG. 10.
FIG. 12 is a schematic cross-sectional view showing a state where grout material is filled in the penetration portion in the state of FIG. 11.
FIG. 13 is a schematic enlarged view of a portion D of FIG. 12 showing a state in which the expansion member is inserted and expanded in the penetration state in the state of FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Although the present invention has been described with reference to the embodiments shown in the drawings, it is to be understood that the technical idea of the present invention and its essential structure and operation are not limited thereby.

1 is a schematic perspective view showing a state in which the insertion portion is formed in the seabed ground by the construction method of the present invention and the bottom portion of the tubular subsea anchor is penetrated and installed. In the construction method of the present invention in order to penetrate and fix the tubular subsea anchor 200 having a hollow in the seabed ground in the form corresponding to the cross-sectional portion of the subsea anchor 200 as shown in the drawings ). In other words, the bottom of the subsea anchor 200, the bottom of the subsea anchor 200 is not excavated, only the pipe member portion of the subsea anchor 200 is inserted into the subsea ground to a depth designed in accordance with the shape of the subsea anchor 200 The penetration portion 100 is to be formed on the seabed.

In the present invention for forming such a penetration portion 100, a vertical insertion hole (3) in which a pair of guide frame (2) can be inserted is drilled perpendicularly to the ground, and disposed between the guide frame (2) The undersea ground is cut using the diamond wire 1.

FIG. 2 is a schematic perspective view showing a process of drilling a vertical insertion hole 3 in a seabed ground, and FIG. 3 is a schematic plan view showing a state in which a vertical insertion hole 3 is drilled in a seabed ground. have.

In the construction method according to the present invention, first, the vertical insertion hole 3 into which the guide frame 2 can be inserted is drilled vertically on the seabed. At this time, the number and arrangement shape of the vertical insertion hole (3) is determined according to the cross-sectional shape of the subsea anchor 200 to be inserted into the subsea ground, as illustrated in the figure, the subsea anchor 200 has a hexagonal cross section In the case of having a tubular shape, the number of the vertical insertion holes 3 is preferably set to six in accordance with the cross-sectional shape of the subsea anchor 200, and the subsea anchor 200 has a tubular shape having an octagonal cross section. In this case, the number of the vertical insertion holes 3 is preferably eight. When the subsea anchor 200 is made of a tubular member having a polygonal cross section as described above, the penetration portion 100 including the vertical insertion hole 3 and the planar insertion portion 4 described later is a polygonal cross section of the subsea anchor 200. If the cross section of the subsea anchor 200 has a circular shape, when the vertical insertion holes 3 are connected to each other on the sea bottom, the vertical insertion holes 3 are drilled in a number so as to be close to the circular shape. Just do it. The drilling depth of the vertical insertion hole 3 is such that the lower end of the subsea anchor 200 is designed to penetrate into the subsea ground.

The vertical insertion hole 3 may be formed by using the drill bit 300 or other various conventional drilling methods. In addition, the vertical insertion hole 3, as shown in Figure 3, may be previously drilled all the required number, but may be drilled sequentially while performing the process of cutting the ground using the diamond wire 1 as described later. . Initially, however, the vertical insertion hole 3 of at least two neighboring positions must first be drilled.

In this way, after two or more adjacent vertical insertion holes 3 are vertically drilled on the seabed at intervals, the two adjacent vertical insertion holes are formed using the guide frame 2 and the diamond wire 1. The seabed between (3) is cut vertically. FIG. 4 shows a schematic perspective view following the state of FIG. 3 showing the state in which the guide frame 2 and the diamond wire 1 are inserted into the vertical insertion hole 3, and FIG. 5 shows the line AA of FIG. 4. A schematic cross section in accordance with is shown. FIG. 6 is a schematic cross-sectional view corresponding to FIG. 5 showing a form in which the operator guides the guide frame 2 to be inserted into the vertical insertion hole 30 in the state shown in FIG. 5.

As shown in the figure, the pair of guide frames 2 are formed of rod members parallel to each other, and the pulleys 21 are provided at the front end of the guide frame 2, that is, at the end of the seabed ground direction. A diamond wire 1 is arranged across the pulley 21 between the pair of guide frames 2. That is, the diamond wire 1 is across between the front ends of the pair of guide frames 2. The diamond wire 1 is a cutting tool, also called a "diamond wire saw", and generally has a construction in which industrial cutting diamonds are bonded to a wire made of steel, and the wire moves in an extended direction. Industrial cutting diamond rubs with a cutting object, and cut | disconnects a cutting object. Korean Unexamined Patent Publication No. 10-2011-0110935 introduces one example of such a diamond wire and its manufacturing method in detail.

In the present invention, the diamond wire 1 is intersected between the front ends of the pair of guide frames 2 arranged side by side, the rear of the pair of guide frames 2, the rotary drive The device 400 is provided, and the diamond wire 1, which is carried across between the front ends of the pair of guide frames 2, is wound on the drive pulley 401 provided in the rotary drive device 400, and rotated. As the drive pulley 401 is rotated by the operation of the drive device, the diamond wire 1 is linearly moved across the front ends of the pair of guide frames 2.

7 to 9 are schematic cross-sectional views corresponding to FIG. 5 showing a state in which cutting of the subsea ground is performed while the guide frame 2 is inserted into the vertical insertion hole 3 following the state of FIG. 5, respectively. . As described above with reference to FIGS. 4 to 6, in a state in which two or more vertical insertion holes 3 are drilled in the seabed, a pair of guide frames 2 on which the diamond wire 1 is laid is perpendicular to the seabed. 6, the pair of guide frames 2 are inserted into the vertical insertion holes 3 at positions adjacent to each other. At this time, a work force such as a diver may guide the guide frame 2 to be inserted into the vertical insertion hole 3 (see FIG. 6). In the drawings, reference numeral 402 denotes a lifting vessel 402 connected to an offshore crane (not shown) to inject the pair of guide frames 2 and the rotary drive device 400 into the seabed.

As the guide frame 2 is inserted into the vertical insertion hole 3 as shown in FIG. 7, the diamond wire 1 comes into contact with the sea bottom surface between the vertical insertion holes 3, and the diamond wire 1 linearly moves. Subsea surface is cut in a straight line. As described above, the plane inserting portion 4 is vertically formed on the seabed between the vertical insertion holes 3 by cutting the diamond wire 1. 8 shows a process in which the pair of guide frames 2 continue to advance into the vertical insertion hole 3 and the diamond wire 1 cuts the seabed to form the planar insertion portion 4. In FIG. 9, the guide frame 2 is inserted to the limit where the guide frame 2 can be inserted, and the diamond wire 1 cuts the seabed to the insertion limit of the guide frame 2 to form the planar insertion portion 4. The state is shown. When the planar inserting portion 4 is formed in this manner, two adjacent vertical inserting holes 3 and the planar inserting portion 4 formed therebetween communicate with each other.

After the planar insertion portion 4 is formed in a straight line between the two neighboring vertical insertion holes 3 in this manner, the guide frame 2 and the diamond wire 1 are pulled out of the sea floor, and another By reselecting the two vertical insertion holes and repeatedly forming the planar insertion part between the vertical insertion holes as described above, the plurality of vertical insertion holes are connected to each other by a straight planar insertion part 4 between the plurality of vertical insertion holes. 100) is formed on the seabed.

After the penetration part 100 is formed as described above, the lower end of the subsea anchor 200 is introduced into the penetration part 100. FIG. 10 is a schematic perspective view illustrating a state in which the lower end of the subsea anchor 200 is inserted into the penetration part 100, and FIG. 11 is a schematic cross-sectional view taken along the line BB of FIG. 10, and FIG. 12. 11 is a schematic cross-sectional view corresponding to FIG. 10 showing a state in which the lower end of the subsea anchor 200 is inserted into the penetration part 100 and the grout material 110 is injected following the state of FIG. 11. As such, after the lower end of the subsea anchor 200 is inserted into the penetration portion 100, the submarine anchor 200 is filled into the grout member 110 by filling the grout member 110 in the penetration portion 100 as necessary. It may be embedded to be firmly fixed at the penetration portion (100). Thus, according to the structure in which the grout material 110 was injected, the effect that the pullout resistance of the subsea anchor 200 is greatly improved is exhibited.

On the other hand, due to the nature of work on the seabed, it may be difficult to inject and fill the grout material 110 into the penetration portion (100). In this case, after the lower end of the subsea anchor 200 is inserted into the penetration unit 100, the lower end of the subsea anchor 200 can be more firmly fixed using the expansion member 120. That is, having a bag-shaped configuration is inserted into the inlet 100 to expand the expansion member 120 that is expanded by injecting the drug solution therein or by a chemical reaction to the intrusion bottom 100 of the seabed ground of the penetration 100 After the expansion member 120 is positioned between the wall and the subsea anchor 200, the expansion member 120 is expanded, thereby increasing friction in a state where the lower end of the subsea anchor 200 is infiltrated into the penetration portion 100. It can be more firmly fixed through the large pullout resistance and support can be exerted. FIG. 13 is a schematic enlarged view of a circle D portion of FIG. 12 showing a state in which the expansion member 120 is inserted into the penetration portion 100 to fix the lower end of the subsea anchor 200.

As described above, in the present invention, using the guide frame 2 and the diamond wire 1, after forming the penetration portion 100 in the seabed ground in a form corresponding to the cross-sectional shape of the subsea anchor 200, the seabed By fixing the lower end of the anchor 200 to be inserted into the penetration part 100, the subsea anchor 200 is firmly penetrated and installed on the subsea ground. That is, in the present invention, when the pipe-shaped subsea anchor 200 is inserted into the subsea ground, the drilling of the hole corresponding to the entire cross section of the subsea anchor is necessarily required in the prior art. In the present invention, it is sufficient to drill the vertical insertion hole 3 having a diameter small enough that the guide frame 2 can be inserted by a drill or the like. As such, in the present invention, by removing the drilling operation corresponding to the entire cross section of the subsea anchor 200, it is not necessary to use a large-scale drill, and thus, a cost reduction effect and an improvement in work efficiency due to the use of a large-scale equipment are exhibited. .

In particular, in the present invention, it is not necessary to drill a large-scale hole, so there is no need to perform the hollow wall reinforcement work of the punched hole, and thus it is possible to reduce the cost and time required for the hollow wall reinforcement work of the punched hole. The effect that construction is possible is exhibited.

Furthermore, in the present invention, since only the pipe cross-sectional form of the subsea anchor 200 is excavated with respect to the subsea ground, the excavation site of the subsea ground necessary for the penetration installation of the subsea anchor 200 is minimized, and therefore unnecessary perforation of the subsea ground part This prevents the drilling cost accordingly can be reduced and the economical effect is improved. For reference, the present invention is derived from the research results of "development of algae power generation substructure not affected by water depth, seabed topography, algae, ground geology" related to the technology innovation development project of the Small and Medium Business Administration (project unique number S2058475).

1: diamond wire
2: guide frame
3: vertical insertion hole
4: flat insert

Claims (3)

Using the pair of guide frames (2) having a diamond wire (1) to form the penetration portion 100 in the seabed ground, and to secure the subsea anchor 200 to the penetration portion 100 to construct the subsea anchors As a method,
The pair of guide frames 2 is composed of a pair of rod members parallel to each other, the front end of the pair of rod members are each provided with a pulley 21, to cut the object through a linear motion A diamond wire 1 is disposed across the pulleys 21 between the rod members parallel to each other, and a rearward driving device 400 is provided at the rear of the pair of guide frames 2. The diamond wire 1, which is passed across between the front ends of the pair of guide frames 2, is wound around the drive pulley 401 provided in the rotary drive device 400, and is driven by the operation of the rotary drive device 400. As the pulley 401 rotates, the diamond wire 1 linearly moves across between the front ends of the pair of guide frames 2;
Drilling a plurality of vertical insertion holes (3) perpendicularly to the seabed surface;
The pair of guide frames 2 provided with diamond wires 1 at their front ends are inserted into two vertical insertion holes 3 adjacent to each other, so that the two guide frames 2 are inserted. Cutting the seabed ground between the vertical insertion holes 3 from the direction in which the diamond wire 1 is perpendicular to vertically forming the planar insertion portion 4 between the vertical insertion holes 3;
The inserting operation of the guide frame 2 and the forming of the planar inserting portion 4 by the diamond wire 1 are repeated for the plurality of vertical inserting holes 3, so that the vertical inserting hole 3 and the planar inserting portion ( 4) forming a penetration portion 100 having a shape corresponding to the cross-sectional shape of the subsea anchor 200 in the seabed; And
Inject the lower end of the subsea anchor 200 into the penetration portion 100, and fill the grout member 110 in the penetration portion 100 so that the subsea anchor 200 is embedded in the grout material 110 to fix the seabed Construction method of the subsea anchors comprising the step of fixing the anchor 200 in the seabed ground. delete delete

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