KR20240071459A - System for installation of offshore jacket structure and method for installation of offshore jacket structure using the same - Google Patents

Abstract

A subsea pile penetrating into the subsea ground according to an embodiment of the present invention; A first non-slip coating layer formed to extend in the circumferential direction on the upper outer peripheral surface of the submarine pile; Jacket legs of the marine jacket structure inserted into the seafloor pile; A horizontal support plate coupled to the outer peripheral surface of the jacket leg and formed in a circular ring shape extending in the circumferential direction of the jacket leg, and a vertical support plate extending downward along the outer edge of the horizontal support plate and formed in a circular tubular shape. absence of tabbing; and a plurality of first hydraulic cylinders coupled to the vertical support plate so as to be spaced apart from each other in the circumferential direction, wherein the plurality of first hydraulic cylinders drive toward the upper outer peripheral surface of the subsea pile to apply the jacket leg to the subsea pile. An installation system for a marine jacket structure is provided, which includes an upper horizontal gripper for fixing, and wherein the first hydraulic cylinder is driven toward the upper outer peripheral surface of the submarine pile and comes into close contact with the first non-slip coating layer.

Description

Installation system for marine jacket structures and method for installing marine jacket structures using the same {SYSTEM FOR INSTALLATION OF OFFSHORE JACKET STRUCTURE AND METHOD FOR INSTALLATION OF OFFSHORE JACKET STRUCTURE USING THE SAME}

The present invention relates to an installation system for a marine jacket structure and a method for installing a marine jacket structure using the same.

When offshore structures, such as offshore wind power equipment or offshore drilling equipment, are installed underwater, they may be corroded or contaminated by seawater. Accordingly, it is common to install a support structure fixed to the seafloor, prepare a platform on the support structure exposed above sea level, and then install the offshore structure on the platform. Such support structures include jacket structures.

The jacket structure may be composed of a plurality of hollow legs and a plurality of braces connecting the legs, and is generally fixed to the seafloor through piles.

At this time, the installation method of the jacket structure can be classified into a post-piling method and a pre-piling method depending on the pile construction period.

Among them, the pre-piling method may consist of first driving a pile into the seabed, inserting a jacket leg into the pile, and then combining the pile and the jacket leg by grouting.

In this way, a gripper can be used to secure the jacket leg inserted into the pile to the pile before injecting the grout. Since the coefficient of friction between the gripper and the pile is reduced to about half in water compared to in air, structural stability is reduced. This may result in problems such as having to increase the capacity of the gripper hydraulic device.

An embodiment of the present invention provides an installation system for a marine jacket structure that can improve structural stability by increasing friction between a gripper and a submarine pile, and a method for installing a marine jacket structure using the same.

Meanwhile, other unspecified purposes of the present invention will be additionally considered within the scope that can be easily inferred from the following detailed description and its effects.

According to one aspect of the present invention, a subsea pile penetrating into the subsea ground;

A first non-slip coating layer formed to extend in the circumferential direction on the upper outer peripheral surface of the submarine pile;

Jacket legs of the marine jacket structure inserted into the seafloor pile;

A horizontal support plate coupled to the outer peripheral surface of the jacket leg and formed in a circular ring shape extending in the circumferential direction of the jacket leg, and a vertical support plate extending downward along the outer edge of the horizontal support plate and formed in a circular tubular shape. absence of tabbing; and

It includes a plurality of first hydraulic cylinders coupled to the vertical support plate so as to be spaced apart from each other in a circumferential direction, wherein the plurality of first hydraulic cylinders drive toward the upper outer peripheral surface of the subsea pile to secure the jacket leg to the subsea pile. It includes an upper horizontal gripper,

The first hydraulic cylinder may be provided in an installation system for a marine jacket structure, wherein the first hydraulic cylinder is driven toward the upper outer peripheral surface of the submarine pile and comes into close contact with the first non-slip coating layer.

According to one aspect of the present invention, the first non-slip coating layer may have a higher coefficient of friction than the subsea pile.

According to one aspect of the present invention, the first non-slip coating layer may be made of a resin composition in which resin and abrasive powder are mixed.

According to one aspect of the present invention, the first non-slip coating layer may be formed in a ring shape extending in the circumferential direction on the upper outer peripheral surface of the submarine pile.

According to one aspect of the present invention, the first hydraulic cylinder,

a cylinder body coupled to the vertical support plate;

a piston assembly that is slidably coupled to the cylinder body and moves forward or backward in the radial direction of the jacket leg according to hydraulic pressure supplied to the cylinder body;

a connecting rod rotatably coupled to the piston assembly through a hinge axis; and

It is coupled to the connecting rod and includes a pressing member in close contact with the first non-slip coating layer,

The hinge axis is disposed parallel to the central axis of the jacket leg,

The pressing surface of the pressing member may be formed with a curvature corresponding to the outer peripheral surface of the subsea pile so as to be in close contact with the first non-slip coating layer.

According to one aspect of the present invention, the first hydraulic cylinder,

It may further include a brake lining coupled to the pressing surface.

According to one aspect of the present invention, the first hydraulic cylinder,

It may further include a second non-slip coating layer formed on the pressing surface.

According to one aspect of the present invention, the second non-slip coating layer may be made of a resin composition in which resin and abrasive powder are mixed.

According to one aspect of the present invention, the jacket leg may further include a grouting device for injecting grout into the space between the jacket leg and the submarine pile while the jacket leg is fixed to the submarine pile.

According to one aspect of the present invention, the grouting device,

A grout pipe installed within the jacket leg and disposed to penetrate the inner peripheral surface of the jacket leg to inject grout into the space between the jacket leg and the subsea pile; and

It may include a grout seal interposed between the lower outer peripheral surface of the jacket leg and the lower inner peripheral surface of the subsea pile.

According to one aspect of the present invention, it includes a plurality of second hydraulic cylinders coupled to the horizontal support plate so as to be spaced apart from each other in the circumferential direction, and the plurality of second hydraulic cylinders are connected to the sea bottom when the jacket leg is inserted into the sea bottom pile. It may further include a vertical gripper that drives toward the top surface of the pile to support the jacket leg against the subsea pile while adjusting the horizontality of the jacket leg.

According to one aspect of the present invention, it includes a plurality of third hydraulic cylinders coupled to the inner peripheral surface of the jacket leg so as to be spaced apart from each other in the circumferential direction, and the plurality of third hydraulic cylinders are driven toward the lower inner peripheral surface of the subsea pile. It may further include a lower horizontal gripper that secures the jacket leg to the subsea pile.

In accordance with another aspect of the present invention, in a method of installing a marine jacket structure using a marine jacket structure installation system,

Penetrating the subsea pile into the subsea ground;

seating the stabbing member on the top surface of the subsea pile by lifting the marine jacket structure and inserting the jacket leg of the marine jacket structure into the subsea pile;

adjusting the horizontality of the jacket leg by operating the vertical gripper;

securing the jacket leg to the subsea pile by activating the upper horizontal gripper and the lower horizontal gripper; and

A method of installing a marine jacket structure is provided, comprising the step of injecting grout into the space between the jacket leg and the seabed pile by operating the grouting device while the jacket leg is fixed to the seafloor pile. You can.

According to an embodiment of the present invention, by forming a first non-slip coating layer on the upper outer peripheral surface of the subsea pile, the friction between the gripper and the subsea pile can be increased to improve structural stability.

Additionally, friction between the gripper and the subsea pile can be further increased by combining a brake lining or forming a second non-slip coating layer on the pressure surface of the upper horizontal gripper.

In addition, rather than placing the jacket structure on the seafloor first, the submarine pile is first penetrated into the seafloor, then the jacket leg is inserted into the seafloor pile, and the jacket leg is held by a gripper for about 24 hours until the injected grout is completely hardened. By fixing it to the seabed piles, compared to the conventional method of installing marine jacket structures, the installation period, which took about 48 days per marine structure, can be shortened to about 36 days, achieving a construction period reduction of about 25%.

Additionally, the stabbing member that combines the vertical gripper and the upper horizontal gripper can be removed and recycled after construction.

In addition, even when the jacket leg is not aligned with the center of the subsea pile, the pressure surface of the second hydraulic cylinder constituting the upper horizontal gripper is brought into close contact with the outer peripheral surface of the subsea pile, so that the upper horizontal gripper stably attaches the jacket leg to the subsea pile. You can also make it fixed.

Meanwhile, it is to be added that even if the effects are not explicitly mentioned herein, the effects described in the following specification and their potential effects expected from the technical features of the present invention are treated as if described in the specification of the present invention.

1 is a diagram of an installation system for a marine jacket structure according to an embodiment of the present invention,
Figure 2 is a longitudinal cross-sectional view of Figure 1,
Figure 3 is a partial enlarged view of Figure 2,
Figure 4 is a perspective view of the subsea pile of Figure 3;
Figure 5 is a block diagram showing the control unit,
Figure 6 is a cross-sectional view of Figure 1;
Figure 7 is a partial enlarged view of Figure 6,
Figures 8 to 10 are diagrams showing the operation of the second hydraulic cylinder of Figure 6,
Figure 11 is a flowchart of a method for installing a marine jacket structure according to another embodiment of the present invention,
Figures 12 and 13 are diagrams for explaining each step of the installation method of the marine jacket structure of Figure 11.
The attached drawings are intended as reference for understanding the technical idea of the present invention, and are not intended to limit the scope of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

Terms used in the embodiments of the present invention, unless clearly defined in a different sense, may be interpreted as meanings that can be generally understood by those skilled in the art to which the present invention pertains, and may only be interpreted as specific meanings. It will be viewed as an example to explain the embodiment, but there is no intention to limit the present invention.

In this specification, the singular form will be considered to also include the plural form unless otherwise specified.

Additionally, when a part is described as “including” a certain element, it means that the part may further include other elements.

Additionally, when a component is described as “above” it means above or below the component, and does not necessarily mean that it is located above the direction of gravity.

Additionally, when a component is described as “connected” or “coupled” to another component, it not only means that the component is directly connected or coupled to the other component, but also indirectly through another component. It may also include cases where it is connected or combined.

In addition, terms such as first and second may be used to describe a certain component, but these terms are only used to distinguish the component from other components, and the essence or order of the component is determined by the term. It is not intended to limit the order or the like.

Figure 1 is a diagram of an installation system for a marine jacket structure according to an embodiment of the present invention, Figure 2 is a longitudinal cross-sectional view of Figure 1, Figure 3 is a partial enlarged view of Figure 2, and Figure 4 is a subsea pile of Figure 3. It is a perspective view, and Figure 5 is a block diagram showing the control unit.

1 to 5, the installation system 1 for a marine jacket structure according to an embodiment of the present invention includes a subsea pile 10, a jacket leg 20, a stabbing member 30, and a vertical gripper 40. ), may include an upper horizontal gripper 50 and a grouting device 70, and may further include a lower horizontal gripper 60, a sensor unit 80, and/or a control unit 90.

The subsea pile 10 may be penetrated into the subsea ground using a pile driver or the like, and may be, for example, shaped like a circular tube extending in the vertical direction.

A first non-slip coating layer 11 may be formed on the upper outer peripheral surface of the subsea pile 10.

The first non-slip coating layer 11 may be made of a material with a higher coefficient of friction than the subsea pile 10.

For example, the first non-slip coating layer 11 may be made of a resin composition in which abrasive powder is mixed with a resin, for example, an epoxy resin.

Accordingly, the frictional force with the upper horizontal gripper 50 in close contact with the first non-slip coating layer 11 can be increased.

Additionally, the first non-slip coating layer 11 may be formed to extend in the circumferential direction of the subsea pile 10, and may be formed, for example, in a ring shape. As a result, the alignment work between the first non-slip coating layer 11 and the upper horizontal gripper 50 in the circumferential direction of the subsea pile 10 can be omitted.

The jacket leg 20 may be formed at the bottom of the marine jacket structure, and may be lifted using a crane or the like and inserted into the seabed pile 10.

The jacket leg 20 inserted into the subsea pile 10 in this way may be seated or supported on the upper surface of the subsea pile 10 through the stabbing member 30 coupled to the jacket leg 20.

The stabbing member 30 may include a horizontal support plate 31 and a vertical support plate 32.

The horizontal support plate 31 may be coupled to the outer peripheral surface of the jacket leg 20 and formed into a circular ring shape extending in the circumferential direction of the jacket leg 20, and the vertical support plate 32 may be formed at the outer edge of the horizontal support plate 31. It can be formed into a circular tube shape by extending downward along.

The vertical gripper 40 may include a plurality of second hydraulic cylinders coupled to the horizontal support plate 31.

The plurality of second hydraulic cylinders may be arranged to be spaced apart from each other in the circumferential direction of the horizontal support plate 31, and when the jacket leg 20 is inserted into the subsea pile 10, it is driven toward the upper surface of the subsea pile 10 to form the jacket. While supporting the leg 20 against the subsea pile 10, the horizontality of the jacket leg 20 can be adjusted.

For example, the sensor unit 80 may include a tilt sensor that measures the tilt of the jacket leg 20, and the control unit 90 may operate the vertical gripper 40 based on the detection result of the sensor unit 80. The horizontality of the jacket leg 20 can be adjusted by automatically controlling the plurality of second hydraulic cylinders individually.

Meanwhile, a vertical gripper ring 12 may be interposed between the vertical gripper 40 and the top surface of the subsea pile 10.

The vertical gripper ring 12 may be formed in a circular ring shape to suppress direct stress concentration on the subsea pile 10 due to the operation of the vertical gripper 40. The vertical gripper ring 12 may be coupled to the subsea pile 10 by tag welding before construction of the subsea pile 10, or may be separated during the leveling operation.

The upper horizontal gripper 50 may include a plurality of first hydraulic cylinders coupled to the vertical support plate 32.

The plurality of first hydraulic cylinders may be arranged to be spaced apart from each other in the circumferential direction of the vertical support plate 32, and the first non-slip coating layer 11 formed on the upper outer peripheral surface of the subsea pile 10, specifically, the upper outer peripheral surface of the subsea pile 10. ), the jacket leg 20 can be fixed to the subsea pile 10.

For example, the control unit 90 may control the vertical gripper 40 to complete adjustment of the horizontality of the jacket leg 20 and then drive the upper horizontal gripper 50 and/or the lower horizontal gripper 60. .

The lower horizontal gripper 60 may include a plurality of third hydraulic cylinders coupled to the inner peripheral surface of the jacket leg 20.

The plurality of third hydraulic cylinders may be arranged to be spaced apart from each other in the circumferential direction of the jacket leg 20, and are driven toward the lower inner peripheral surface of the subsea pile 10 through the through hole formed in the jacket leg 20 to form the jacket leg 20. ) can be fixed to the subsea pile (10).

The lower horizontal gripper 60 may be disposed at a lower height than the upper horizontal gripper 50.

Meanwhile, the upper horizontal gripper 50 may require a greater number of hydraulic cylinders than the vertical gripper 40 and the lower horizontal gripper 60. The reason is that the position of the upper horizontal gripper 50 is the point where the wave force and moment due to the wave acting horizontally are concentrated, and the weight of the entire marine jacket structure considering the underwater friction coefficient must be fixed to the submarine pile 10, so the relative This may require a large number of hydraulic cylinders.

For example, when four second hydraulic cylinders are coupled to the stabbing member 30, 8 to 12 first hydraulic cylinders may be installed, and 4 third hydraulic cylinders may be installed.

Additionally, in the present invention, the number of first hydraulic cylinders can be reduced by increasing the underwater friction coefficient through a non-slip coating layer, a brake lining, etc., which will be described later.

The grouting device 70 injects grout (G) into the space between the jacket leg 20 and the subsea pile 10 while the jacket leg 20 is fixed to the subsea pile 10 by the gripper. You can.

Grouting device 70 may include a grout pipe 71 and a grout seal 72.

The grout pipe 71 is installed within the jacket leg 20 and is arranged to penetrate the inner peripheral surface of the jacket leg 20, so that grout (G) can be injected into the space between the jacket leg 20 and the subsea pile 10. .

The grout seal 72 is interposed between the lower outer peripheral surface of the jacket leg 20 and the lower inner peripheral surface of the subsea pile 10 to prevent leakage of the grout (G).

On the other hand, the lower horizontal gripper 60 may not be recyclable because it is buried by grout (G) after construction of the marine jacket structure, but at least one of the vertical gripper 40 and the upper horizontal gripper 50, or, The entire stabbing member 30, in which the vertical gripper 40 and the upper horizontal gripper 50 are combined, may be removed and recycled after construction of the marine jacket structure.

Figure 6 is a cross-sectional view of Figure 1, Figure 7 is a partially enlarged view of Figure 6, and Figures 8 to 10 are diagrams showing the operation of the second hydraulic cylinder of Figure 6.

6 to 10, the upper horizontal gripper 50 may include a plurality of first hydraulic cylinders, and the plurality of first hydraulic cylinders are each coupled to the vertical support plate 32 and mutually connected to the vertical support plate 32. ) can be arranged to be spaced apart in the circumferential direction. The first hydraulic cylinder may include a cylinder body 51, a piston assembly 52, a connecting rod 53, a hinge shaft 54, and a pressing member 55, and a second non-slip coating layer 56 and/or It may further include a brake lining (57).

The cylinder body 51 may be coupled to the outer peripheral surface of the vertical support plate 32.

The piston assembly 52 may be slidably coupled to the cylinder body 51 and advances in the radial direction of the jacket leg 20 toward the center of the jacket leg 20 according to the hydraulic pressure supply to the cylinder body 51. Or you can go backwards. To this end, a through hole, which is a passage through which the piston assembly 52 and the connecting rod 53 can enter and exit, may be formed in the vertical support plate 32.

The connecting rod 53 may be rotatably coupled to the piston assembly 52 through the hinge axis 54.

The hinge axis 54 may be arranged parallel to the central axis of the jacket leg 20.

Therefore, while the horizontality of the jacket leg 20 is adjusted, the verticality is not maintained, that is, the central axis of the jacket leg 20 and the central axis of the subsea pile 10 are not aligned with each other or are spaced apart from each other and are parallel. In the deployed state, the connecting rod 53 rotates around the hinge axis 54 so that the pressing member 55 coupled to the connecting rod 53 can be brought into close contact with the outer peripheral surface of the subsea pile 10.

The pressing surface 55a of the pressing member 55 may have a curvature corresponding to the outer peripheral surface of the subsea pile 10 so as to be in close contact with the outer peripheral surface of the subsea pile 10, specifically the first non-slip coating layer 11.

That is, if the pressing surface 55a is cut in an arbitrary plane perpendicular to the hinge axis 54, a curve having the same radius of curvature can be obtained.

Additionally, a second non-slip coating layer 56 may be formed on the pressing surface 55a of the pressing member 55.

Like the first non-slip coating layer 11, the second non-slip coating layer 56 may be made of a material with a high coefficient of friction.

For example, the second non-slip coating layer 56 may be made of a resin composition in which abrasive powder is mixed with a resin, for example, an epoxy resin.

Accordingly, the friction force between the subsea pile 10 and the upper horizontal gripper 50 can be increased.

As another example, the brake lining 57 may be coupled to the pressing surface 55a of the pressing member 55 using screws or the like.

The brake lining 57 may have a curvature corresponding to the pressing surface 55a.

Accordingly, the friction force between the subsea pile 10 and the upper horizontal gripper 50 can be increased.

As another example, a brake lining 57 may be coupled to the pressing surface 55a of the pressing member 55, and a second non-slip coating layer 56 may be formed on the brake lining 57.

Figure 11 is a flowchart of a method of installing a marine jacket structure according to another embodiment of the present invention, and Figures 12 and 13 are diagrams for explaining each step of the installation method of a marine jacket structure of Figure 11.

Referring to Figures 2 and 11 to 13, the method of installing a marine jacket structure according to another embodiment of the present invention can use the installation system 1 for a marine jacket structure according to an embodiment of the present invention, and can be installed on the seabed. Step of penetrating the pile into the seabed ground (S100), step of inserting the jacket leg of the marine jacket structure into the seabed pile (S200), step of adjusting the horizontality of the jacket leg using a vertical gripper (S300), upper horizontal gripper It may include a step of fixing the jacket leg to the submarine pile using a lower horizontal gripper (S400), and a step of injecting grout using a grouting device (S500).

First, as shown in FIG. 12, a plurality of subsea piles 10 can be fixed to the subsea ground (S100).

Next, as shown in FIG. 13, the stabbing member 30 is inserted into the subsea pile 10 by lifting the marine jacket structure and inserting the plurality of jacket legs 20 of the marine jacket structure into the plurality of subsea piles 10. It can be seated on the upper surface of (S200), and the horizontality of the jacket leg (20) can be adjusted by operating the vertical gripper (40) (S300), and the upper horizontal gripper (50) and lower horizontal gripper (60) The jacket leg 20 can be fixed to the submarine pile 10 by operating (S400).

Next, as shown in FIG. 2, grout (G) can be injected into the space between the jacket leg 20 and the subsea pile 10 by operating the grouting device 70 (S500).

Meanwhile, the fixed state between the subsea pile 10 and the jacket leg 20 by the vertical gripper 40, the upper horizontal gripper 50, and the lower horizontal gripper 60 is maintained for about 24 hours when the grout (G) is completely hardened. It can be.

Although the above description focuses on preferred embodiments of the present invention, this is only an example and does not limit the present invention. Those of ordinary skill in the technical field to which the present invention pertains can modify and change the embodiments in various ways by adding, changing, deleting or adding components, etc., without departing from the technical idea of the present invention as set forth in the claims. It will be possible, and this will also be said to be included within the scope of rights of the present invention.

1: Installation system for marine jacket structures
10: Subsea piles
20: Jacket leg
40: vertical gripper
50: Upper horizontal gripper
60: Lower horizontal gripper
70: Grouting device
80: sensor unit
90: control unit

Claims (13)

Subsea piles that penetrate into the seafloor;
A first non-slip coating layer formed to extend in the circumferential direction on the upper outer peripheral surface of the submarine pile;
Jacket legs of the marine jacket structure inserted into the seafloor pile;
A horizontal support plate coupled to the outer peripheral surface of the jacket leg and formed in a circular ring shape extending in the circumferential direction of the jacket leg, and a vertical support plate extending downward along the outer edge of the horizontal support plate and formed in a circular tubular shape. absence of tabbing; and
It includes a plurality of first hydraulic cylinders coupled to the vertical support plate so as to be spaced apart from each other in a circumferential direction, wherein the plurality of first hydraulic cylinders drive toward the upper outer peripheral surface of the subsea pile to secure the jacket leg to the subsea pile. It includes an upper horizontal gripper,
The first hydraulic cylinder is driven toward the upper outer peripheral surface of the submarine pile and is in close contact with the first non-slip coating layer. According to paragraph 1,
The first non-slip coating layer is an installation system for a marine jacket structure, characterized in that the friction coefficient is greater than that of the submarine pile. According to paragraph 2,
The first non-slip coating layer is an installation system for a marine jacket structure, wherein the first non-slip coating layer is made of a resin composition mixed with resin and abrasive powder. According to paragraph 1,
The first non-slip coating layer is an installation system for a marine jacket structure, characterized in that it is formed in a ring shape extending in the circumferential direction on the upper outer peripheral surface of the submarine pile. According to paragraph 1,
The first hydraulic cylinder,
a cylinder body coupled to the vertical support plate;
a piston assembly that is slidably coupled to the cylinder body and moves forward or backward in the radial direction of the jacket leg according to hydraulic pressure supplied to the cylinder body;
a connecting rod rotatably coupled to the piston assembly through a hinge axis; and
It is coupled to the connecting rod and includes a pressing member in close contact with the first non-slip coating layer,
The hinge axis is arranged parallel to the central axis of the jacket leg,
An installation system for a marine jacket structure, characterized in that the pressing surface of the pressing member is formed with a curvature corresponding to the outer peripheral surface of the submarine pile so as to be in close contact with the first non-slip coating layer. According to clause 5,
The first hydraulic cylinder,
An installation system for a marine jacket structure, further comprising a brake lining coupled to the pressurized surface. According to clause 5,
The first hydraulic cylinder,
An installation system for a marine jacket structure, further comprising a second non-slip coating layer formed on the pressing surface. In clause 7,
The second non-slip coating layer is an installation system for a marine jacket structure, wherein the second non-slip coating layer is made of a resin composition mixed with resin and abrasive powder. According to paragraph 1,
An installation system for an offshore jacket structure, further comprising a grouting device for injecting grout into the space between the jacket leg and the subsea pile while the jacket leg is fixed to the subsea pile. According to clause 9,
The grouting device,
A grout pipe installed within the jacket leg and disposed to penetrate the inner peripheral surface of the jacket leg to inject grout into the space between the jacket leg and the subsea pile; and
An installation system for a marine jacket structure, comprising a grout seal interposed between the lower outer peripheral surface of the jacket leg and the lower inner peripheral surface of the subsea pile. According to clause 10,
It includes a plurality of second hydraulic cylinders coupled to the horizontal support plate so as to be spaced apart from each other in a circumferential direction, and the plurality of second hydraulic cylinders are driven toward the upper surface of the subsea pile when the jacket leg is inserted into the subsea pile. An installation system for a marine jacket structure, further comprising a vertical gripper that supports the jacket leg against the seabed pile and adjusts the horizontality of the jacket leg. According to clause 11,
It includes a plurality of third hydraulic cylinders coupled to the inner peripheral surface of the jacket leg so as to be spaced apart from each other in the circumferential direction, and the plurality of third hydraulic cylinders are driven toward the lower inner peripheral surface of the subsea pile to move the jacket leg to the subsea pile. An installation system for a marine jacket structure, further comprising a lower horizontal gripper fixed to the. In the method of installing a marine jacket structure using the installation system of the marine jacket structure according to paragraph 12,
Penetrating the subsea pile into the subsea ground;
seating the stabbing member on the top surface of the subsea pile by lifting the marine jacket structure and inserting the jacket leg of the marine jacket structure into the subsea pile;
adjusting the horizontality of the jacket leg by operating the vertical gripper;
securing the jacket leg to the subsea pile by activating the upper horizontal gripper and the lower horizontal gripper; and
A method of installing an offshore jacket structure, comprising the step of injecting grout into the space between the jacket leg and the subsea pile by operating the grouting device while the jacket leg is fixed to the subsea pile.

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