KR102457037B1 - Template structure for beforehand pile penetration and method for installation of marine substructure using it - Google Patents

Abstract

The present invention provides a template structure for a beforehand pile penetration method and a method for installing a marine substructure using the same, capable of saving installation costs and reducing construction periods of a marine substructure in various kinds of offshore plants or a marine wind power generator. The template structure for a beforehand pile penetration method comprises: multiple base mud pads (110) including a hollow at the center, and supporting a templet structure by being mounted on the sea bottom; multiple outer pile guides (120) having a tubular shape, and vertically fixed onto the multiple base mud pads (110); multiple inner pile guides (130) located in the multiple outer pile guides (120), and guiding a steel pile (2) embedded into the sea bottom (1); multiple lower horizontal members (140) horizontally arranged and connected to a side of the outer pile guide (120) of which both ends are adjacent by a hinge; and multiple upper horizontal members (150) horizontally arranged and connected to the side of the inner pile guide (130) of which both ends are adjacent by the hinge.

Description

A template structure for a ship pile penetration method and an offshore substructure installation method using the same {Template structure for beforehand pile penetration and method for installation of marine substructure using it}

The present invention relates to a template structure for a ship pile penetration method and a method for installing an offshore substructure using the same, and more particularly, to a steel pipe pile in the marine ground using a template structure for a ship pile penetration method, and to penetrate the bottom of the sea It relates to a template structure for a line pile penetration method that can be installed by penetrating a leg pile pin of a substructure into a steel pipe pile penetrated into the marine ground by lifting a structure, and a method for installing an offshore substructure using the same.

In general, a wind power generator is a device that is installed on land or at sea to convert wind energy into electrical energy to produce electric power. As problems such as environmental regulations and instability in the supply and demand of fossil fuels due to global warming are emerging, a new and renewable energy production system Wind power generation is gaining popularity.

Structures including wind power generators have been mainly installed on land, but offshore installations are gradually increasing. For wind power generation, the quality of wind in the sea is generally better than on land, and it is easier to deal with the problem of blade noise. In particular, in order to secure economic feasibility, it is required to secure a large-scale wind farm, but it is difficult to satisfy these conditions on land, so coastal or offshore offshore wind farms are emerging as large-scale offshore wind farms.

A method for installing such a wind power generator structure on the sea can be largely divided into a fixed type and a floating type. The fixed type is a type in which a structure on land is directly fixed to the seabed and responds to environmental loads through structural deformation. a way to overcome

Until recently, offshore wind power generator structures were mainly installed in a fixed type at shallow water depths. Such a fixed type provides favorable operating conditions because the structure is fixed to the seabed. , the cost of constructing and installing structures increases astronomically according to the trend of larger wind power generators.

In addition, since the wind becomes stronger and more constant as it moves away from the land, the power generation efficiency can be increased. Accordingly, the need for the development of wind power generation is being raised even in deep waters farther away from the coast. Therefore, many studies have been conducted on offshore wind turbine structures using floating structures that are not limited by the size of the structures even when the depth of the water increases.

In recent years, the generation capacity of floating wind turbines is on the rise, and in accordance with the technological development trend of installing several wind turbines on one floating body in order to improve operational efficiency, the floating body of the offshore wind power generator structure to support it Large-capacity is required.

In order to install the above offshore wind turbine structure or the substructure of various offshore plants in the ocean, the lower structure is lifted with an offshore crane and installed on the seabed, and then the pile is inserted into the leg of the lower structure to fix the lower structure to the seabed. Therefore, in order to penetrate the ground, it must be driven to the required depth of the sea floor by driving with a driving machine.

This method does not often cause problems such as delay when installing several substructures. However, it is difficult to fabricate the substructures to apply the same size substructures, that is, jetties, jacket structures, and substructures of a large number of offshore generators. After the pile is hoisted to the site and set down on the sea floor, the pile must be driven and penetrated into the ground, so there is a problem in that the construction period increases and the construction cost increases.

The present invention for solving the problems of the prior art as described above, a template structure for a ship pile penetration method that can reduce the installation time of offshore substructures of offshore wind power generators or various offshore plants and save installation costs, and offshore using the same An object of the present invention is to provide a method for installing a lower structure.

An object of the present invention as claimed above, having a hollow in the center, a plurality of base mud pads seated on the seabed to support the template structure; a plurality of tubular external pile guides vertically fixed on the plurality of base mud pads; A plurality of internal pile guides in the shape of a tube positioned within the plurality of external pile guides to guide the steel pipe pile penetrating into the seabed; a plurality of lower horizontal members arranged horizontally and hingedly coupled to the side surfaces of the external pile guide at both ends; and a plurality of upper horizontal members that are horizontally arranged and are hingedly coupled to the side surfaces of the inner pile guide at both ends, which is achieved by a template structure for the line pile penetration method.

According to one aspect of the present invention, the interval between the inner circumferential surface of the plurality of external pile guides and the outer circumferential surface of the inner pile guide is characterized in that it corresponds to an allowable error range between each leg pile pin of the marine substructure.

According to another aspect of the present invention, the upper end of the plurality of internal pile guides, the coupling guide of the upper and lower narrows for inducing the entry of the leg pile pins of the marine substructure into the plurality of internal pile guides) is extended, characterized in that do.

According to another aspect of the present invention, a plurality of lower inclined members that are horizontally arranged and both ends are hingedly coupled to the middle portion of the plurality of lower horizontal members adjacent to each other; and an upper inclined member that is horizontally disposed and is hinge-coupled to an intermediate portion of the plurality of upper horizontal members having both ends adjacent to each other.

According to another aspect of the present invention, a plurality of tilt beams installed on the plurality of upper horizontal members to confirm the inclination of the template structure; and a lower portion is fixed on the plurality of base mud pads and an upper portion is hinged to the side surfaces of the plurality of inner file guides, and selectively elevates the plurality of inner file guides in the plurality of outer file guides to the plurality of upper horizontal members It characterized in that it further comprises a level jack to maintain the horizontal of.

According to another aspect of the present invention, the inner pile guide in the outer pile guide is radially arranged at regular intervals along the circumference of the outer pile guide to correspond to the spacing of the leg pile pins of the marine substructure. It characterized in that it further comprises a hydro jack for fixing by adjusting the position of the.

According to another aspect of the present invention, a lifting lug fixed to the upper surface of the plurality of upper horizontal members at a predetermined distance from the inner pile guide; And both ends are fixed to the lifting lugs of the plurality of upper horizontal members neighboring, characterized in that it further comprises a plurality of sling wire rope fastened to the marine crane hook.

According to another aspect of the present invention, it is characterized in that it further comprises a shim plate attached to the outer peripheral surface of the plurality of inner pile guides radially at regular intervals according to the diameter of the plurality of inner pile guides.

According to another aspect of the present invention, the shim plate is characterized in that it can be added or replaced with a shim plate of different thickness according to the diameter of the plurality of inner pile guides.

In addition, another object of the present invention, a first step of manufacturing the template structure and the offshore substructure on land, and transporting the installation to the sea; A second step of lifting the template structure by hanging the sling wire rope fixed to the lifting lug of the template structure on the offshore crane hook and seated on the seabed; a third step of inserting a steel pipe pile into the internal pile guide of the template structure, penetrating the seabed ground with its own weight, and then driving to the seabed ground using a driving machine; A fourth step of measuring the height of the steel pipe pile driven on the seabed ground and cutting it to the same height; A fifth step of dismantling the template structure by hanging the lifting lug of the template structure on the offshore crane hook; and a sixth step of fixing the offshore substructure to the offshore ground by laying down the leg-pile pins of the offshore substructure in the steel pipe pile, which is achieved by the offshore substructure installation method by the line pile penetration method.

According to one aspect of the present invention, in the process of manufacturing the template structure on land, the hydro jack is selectively driven to correspond to the tolerance range of the interval of each leg pile pin of the offshore substructure inside the external pile guide. Characterized in adjusting the position of the file guide.

According to another aspect of the present invention, the second step is to check the inclination of the upper horizontal member by the plurality of team beams, and selectively drive the plurality of level jacks to maintain the horizontality of the plurality of upper horizontal members. It is characterized in that it further comprises.

According to another aspect of the present invention, the sixth step is characterized in that it is fixed by grouting the steel pipe pile fixed to the seabed and the leg pile pin of the offshore substructure.

According to the present invention, a steel pipe pile is driven into the offshore ground by using a template structure for the ship pile penetration method, and the leg pile pin of the substructure is inserted into the steel pipe pile penetrated into the offshore ground by lifting the offshore substructure. By doing so, there is an effect of reducing the installation period of the offshore substructure and saving the installation cost.

1 is a perspective view of a template structure for a line pile penetration method according to an embodiment of the present invention.
Figure 2 is a side view of the template structure for the line pile penetration method disclosed in Figure 1;
3 is a plan view of a template structure for the line pile penetration method disclosed in FIG. 1 .
4 is a view showing a state in which the template structure is removed after the steel pipe pile is driven into the seabed by using the template structure for the line pile penetration method disclosed in FIG. 1 .
FIG. 5 is a view showing a process of installing the corresponding substructure in the steel pipe pile driven into the seabed by using the template structure for the line pile penetration method disclosed in FIG. 1 .
6 is a view showing a state in which the corresponding substructure is installed in the steel pipe pile driven into the seabed by using the template structure for the line pile penetration method disclosed in FIG. 1 .

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

1 is a perspective view of a template structure for a line pile penetration method according to an embodiment of the present invention, FIG. 2 is a side view of a template structure for a line pile penetration method disclosed in FIG. 1, FIG. 3 is a line pile penetration method disclosed in FIG. It is a plan view of the template structure for

1 to 3 show a template structure for a line pile penetration method according to an embodiment of the present invention, having a hollow in communication with the external pile guide 120 and the internal pile guide 130 in the center, and the offshore substructure Four base mud pads 110, four base mud pads 110 that are seated on the seabed ground (1) for installation and support the entire template structure according to the present invention, four external piles of tubular shape fixed vertically on the four base mud pads 110 The guide 120, located in the four external pile guides 120, and four internal pile guides 130 of a tubular shape guiding the steel pipe pile 2 penetrating into the seabed ground 1, are horizontally arranged so that both ends are Four lower horizontal members 140 that are hinged to the side surfaces of the neighboring external pile guide 120, and four upper horizontal members 150 that are horizontally arranged so that both ends are hinged to the side surfaces of the neighboring internal pile guide 130 ), it is possible to penetrate the steel pipe pile, which is the basis for fixing the offshore substructure to the seabed, into the seabed before installing the offshore substructure on the seabed.

In the above embodiment, the external pile guide 120 and the internal pile guide 130 may be arranged in a square shape having equal intervals. In particular, the lower horizontal member 140 and the upper horizontal member 150 for holding the outer file guide 120 and the inner file guide 130 are hinged on the side surfaces of the outer file guide 120 and the inner file guide 130 . As a result, it is possible to induce free movement in the Z-axis direction of each of the external pile guide 120 and the internal pile guide 130 , and the lower horizontal member 140 and the upper horizontal member 150 and the lower part described below. The hinge coupling between the inclined member 160 and the upper inclined member 170 is to induce free movement of the lower horizontal member 140 and the upper horizontal member 150 in the X and Y axis directions.

In the above embodiment, the interval between the inner circumferential surface of the four outer pile guides 120 and the outer circumferential surface of the inner pile guide 130 is each leg pile pin (3) of the offshore substructure allowed in the process of manufacturing the offshore substructure on land. ) can be set to a value corresponding to the error range between

In addition, the upper end of the four inner file guides 130, the four inner file guides 130, the combination guide 131 of the upper and lower for inducing the entry of the leg pile pins (3) of the marine substructure pre-fabricated and transported. ) is extended, so that the offshore anatomical structure can be smoothly laid down to engage the steel pipe pile (2) pre-inserted into the seabed ground (1).

In the above embodiment, the four lower inclined members 160 are horizontally arranged and both ends are hingedly coupled to the middle portion of the four lower horizontal members 140 adjacent to each other, and the four upper horizontal members arranged horizontally so that both ends are adjacent to each other ( By further comprising an upper inclined member 170 hinged to the middle portion of 150), the four external pile guides 120 and the internal pile guide 130 can be firmly fixed to each other.

The above embodiment is installed on the four upper horizontal members 150, a plurality of tilt beams 180 to confirm the inclination of the template structure, and the lower part is fixed on the four base mud pads 110 and the upper part is 4 A level jack that is hinged to the side of the four inner file guides 130 and selectively elevates the four inner file guides 130 in the four outer file guides 120 to maintain the horizontal level of the four upper horizontal members 170 . By being configured to further include a 190, it can be adjusted vertically with respect to the horizontal plane of the external pile guide 120 and the internal pile guide 130 of the template structure inclined due to the inclination of the seabed ground.

In the above embodiment, the internal pile guide 130 in the external pile guide 120 is radially arranged at regular intervals along the circumference of the external pile guide 120 to correspond to the spacing of the leg pile pins of the marine substructure. ) may be configured to further include a hydro jack 200 for fixing by adjusting the position, which corresponds to the error range of the interval of each leg pile pin of the offshore substructure in the process of manufacturing the template structure on land in advance. It is for adjusting the inner file guide 130 .

In the above embodiment, the lifting lugs 210 fixed to the upper surfaces of the four upper horizontal members 150 at a predetermined interval from the inner pile guide 130, and the four upper horizontal members 150 having both ends adjacent to each other are lifted. By being fixed to the lug 210 and further comprising a plurality of sling wire ropes 220 fastened to the offshore crane hook 4, the template structure according to the present invention before and after pre-penetrating the steel pipe pile into the seabed ground It can be lifted by an offshore crane and lowered to or lifted from the seabed.

The above embodiment may further include a shim plate 132 that is radially attached to the outer circumferential surface of the inner pile guide 130 at a predetermined interval according to the diameter of the four inner pile guides 130 . In addition, the shim plate 132 above may be added or replaced with a shim plate having a different thickness depending on the diameter of the four inner pile guides 130 .

4 is a view showing a state in which the template structure is removed after driving the steel pipe pile into the seabed ground using the template structure for the line pile penetration method disclosed in FIG. A view showing the process of installing the corresponding substructure in a steel pipe pile driven into the seabed by using a template structure, FIG. 6 is a steel pipe driven into the seabed by using the template structure for the line pile penetration method disclosed in FIG. It is a drawing showing the state in which the corresponding substructure is installed in the file.

4 to 6 , the worker first manufactures the template structure and the offshore substructure 5 on land, and transports them to the sea of the work site where the offshore substructure 5 is to be installed using a barge or the like.

Here, in the process of prefabricating the template structure on land before transporting the template to the sea at the work site, the operator selectively selects the hydroxyl jacks 200 arranged at equal intervals along the circumferential direction on the external pile guide 120 . It is possible to adjust the position of the internal pile guide 130 within the external pile guide 120 to correspond to the allowable error range of the spacing of each leg pile pin 3 of the offshore substructure 5 .

As above, the worker who transported the template structure manufactured on land to the sea at the work site hangs the sling wire rope 220 fixed to the lifting lug 210 of the template structure on the offshore crane hook 4 to lift the template structure and lift the template structure offshore. It is seated on the seabed ground (1) of the position where the lower structure (5) is to be installed.

At this time, the operator checks the inclination of the upper horizontal member 150 by the four team beams 180, and selectively drives the plurality of level jacks 190 to maintain the horizontal level of the upper horizontal member 150 of 4 The external pile guide 120 and the internal pile guide 130 are perpendicular to the horizontal plane, that is, the steel pipe pile can be vertically penetrated with respect to the horizontal plane of the seabed.

Then, the operator inserts the steel pipe pile 2, which is the basis of the offshore substructure, into the internal pile guide 130 of the template structure, penetrates the subsea ground 1 with its own weight, and then additionally uses a driving machine to insert the subsea ground (2) ) against

Then, the operator measures the height of the steel pipe pile 2 driven on the seabed ground 1, cuts the same height, that is, the upper end of the steel pipe pile 2 parallel to the horizontal plane, and finishes.

In this way, after vertically penetrating the steel pipe pile (2) into the seabed ground, by hanging the lifting lug 210 of the template structure on the offshore crane hook 4, as in FIG. 4, the template structure is removed, the seabed ground (1) Leave the steel pipe pile (2) penetrated in the.

Finally, as in FIGS. 5 and 6, by hanging the offshore substructure on the offshore crane hook (4), the leg-pile pin (3) of the offshore substructure (5) in the steel pipe pile (2) is laid down to the offshore ground ( Fix the offshore substructure (5) to 1).

And, as shown in Figure 6, the steel pipe pile (2) fixed to the seabed (1) and the leg pile pin (3) of the offshore substructure (5) is finished by grouting.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and it is common in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications are possible by those having the knowledge of, of course, these modified implementation structures should not be understood as departing from the technical spirit of the present invention.

1: Subsea ground 2: Steel pipe pile
3: Leg pile pin 4: Offshore crane hook
5: marine substructure 110: base mud pad
120: external file guide 130: internal file guide
131: coupling guide 132: shim plate
140: lower horizontal member
150: upper horizontal member 160: lower upper inclined member
170: upper inclined member 180: tilt beam
190: level jack 200: hydro jack
210: lifting lug 220: sling wire rope

Claims (13)

A plurality of base mud pads 110 having a hollow in the center and seated on the seabed to support the template structure;
a plurality of external pile guides 120 having a tubular shape fixed vertically on the plurality of base mud pads 110;
A plurality of inner pile guides 130 of a tubular shape positioned within the plurality of external pile guides 120 to guide the steel pipe piles 2 penetrating into the seabed ground (1);
a plurality of upper horizontal members 150 that are horizontally arranged so that both ends are hinged to the side surfaces of the inner pile guide 130;
In the template structure for the line file penetration method consisting of,
A plurality of lower horizontal members (140) that are horizontally arranged and both ends are hinged to the side surfaces of the adjacent external pile guide (120); and
The internal pile guide 130 in the external pile guide 120 is radially arranged at regular intervals along the circumference of the external pile guide 120 to correspond to the spacing of the leg pile pins of the marine substructure. Hydro jack (200) fixed by adjusting the position of
A template structure for the line file penetration method, characterized in that it further comprises. The method of claim 1,
The interval between the inner peripheral surface of the plurality of external pile guides 120 and the outer peripheral surface of the internal pile guide 130 corresponds to an allowable error range between each leg pile pin 3 of the marine substructure,
In the upper end of the plurality of internal pile guides 130, the coupling guide 131 of the upper and lower narrows for inducing the entry of the leg pile pins 3 of the marine substructure into the plurality of internal pile guides 130 is extended. Characterized in, the template structure for the line file penetration method. delete The method according to any one of claims 1 to 2,
a plurality of lower inclined members 160 arranged horizontally and hinge-coupled to an intermediate portion of the plurality of lower horizontal members 140 having both ends adjacent to each other; and
The upper inclined member 170 is horizontally arranged and hinged to the middle portion of the plurality of upper horizontal members 150 having both ends adjacent to each other.
further comprising,
a plurality of tilt beams 180 installed on the plurality of upper horizontal members 150 to check the inclination of the template structure; and
A lower portion is fixed on the plurality of base mud pads 110 and an upper portion is hinged to the side surfaces of the plurality of inner file guides 130, and the plurality of inner file guides 130 in the plurality of outer file guides 120 are fixed on the side. a level jack 190 for selectively raising and lowering the plurality of upper horizontal members 170 to maintain the horizontal level;
A template structure for the line file penetration method, characterized in that it further comprises. delete delete The method according to any one of claims 1 to 2,
Lifting lugs 210 fixed to the upper surfaces of the plurality of upper horizontal members 150 at a predetermined distance from the inner pile guide 130; and
A plurality of sling wire ropes 220 whose both ends are fixed to the lifting lugs 210 of the plurality of upper horizontal members 150 adjacent to each other and are fastened to the marine crane hooks (4).
A template structure for the line file penetration method, characterized in that it further comprises. The method according to any one of claims 1 to 2,
The outer peripheral surface of the plurality of inner pile guides 130 further includes a shim plate 132 that is radially attached at regular intervals according to the diameter of the plurality of inner file guides 130,
The shim plate 132 is a template structure for the line pile penetration method, characterized in that it can be added or replaced with a shim plate of different thickness depending on the diameter of the plurality of inner pile guides 130 . delete delete delete delete delete

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