KR102354807B1 - Detachable footing-leg connection supported by double rings - Google Patents

Abstract

The present invention relates to a connection structure and connection method of a detachable footing and leg supported by a double ring and, more particularly, to a connection structure of a detachable footing and leg supported by a double ring, comprising: a support leg having a hollow part therein while supporting a temporary offshore structure or a jack-up barge; a footing having a center hole into which the end of the leg can be inserted; a lower support member protruding inward from the outer peripheral surface of the lower end of the center hole of the footing and supporting the lower end of the inserted end of the leg; and an upper support member protruding from one side of the outer surface of the leg end so that the upper end of the center hole of the footing is constrained while the leg end is inserted into the footing. Therefore, the present invention can overcome the scope of application limited by the ground conditions, and greatly expand the scope of application of jack-up barges or temporary offshore structures.

Description

Connection structure and connection method of detachable footing and leg supported by double rings {Detachable footing-leg connection supported by double rings}

The present invention relates to a connection structure and a connection method of a detachable footing and a leg supported by a double ring. In more detail, a jack-up barge widely used for offshore construction, or a leg that supports a temporary offshore structure that is temporarily installed on the seabed for offshore construction and withdrawn after construction is complete and footing (spud can), and to a technology that can assemble or remove these footings at the end of the leg according to the conditions of the seabed ground.

Currently, due to the continued increase in the cost of fossil fuels and the potential risks associated with environmental destruction, depletion of fossil fuels and nuclear power due to the harmful gases generated from fossil fuels, solar power generation and the conversion of solar energy into electrical energy As an alternative, wind power generation that converts wind power into electrical energy is required.

In particular, wind power generation is a non-polluting energy source in a natural state and is the most economical energy source among alternative energy sources by current technology. Such wind power generation is a technology that converts wind power into electrical energy and supplies the generated power directly to the power system or consumers. it can be

Because of these advantages, wind power systems have been recognized as the most promising alternative energy sources.

Korea is also very interested in wind power generation systems in order to cope with changes in the international environment such as the World Climate Change Convention, rising oil prices, and the realistic problem of relying on imports for 96% of domestic energy.

In particular, the wind power generation system has a simple structure and installation, so it is easy to operate and manage and unmanned and automated operation is possible. The current situation is triggering the demand for wind power as an energy source.

Meanwhile, in the past, wind power generation structures were mainly constructed on land, but due to problems such as the amount of wind power resources, the aesthetics, and the restrictions of the place, there is a trend of constructing large-scale wind farms in the sea in recent years.

However, in order to safely construct a wind power structure in the sea, a safe installation method for blades and structures (towers) to be installed at high positions is required.

Therefore, a dedicated vessel (hereinafter referred to as a 'jack-up platform') is operated exclusively for the installation of wind power generation structures.

In large water depths greater than 100m, offshore construction is performed using large floating equipment. At lower water depths, it is common to set the end of the leg on the sea bed like a jack-up barge, and raise the entire jack-up barge by about 5m from the sea level to create the same working conditions as on land.

If the seabed on which the jack-up barge is to be seated is in a rocky area such as the East Coast of Korea or Jeju Island, the end of the leg should be reinforced from the inside and the tip should be sharpened so that it can be fixed to the bedrock.

However, in the case of soft ground such as Woori or Southwest Sea, it is composed of a form of connecting a square or circular footing structure that greatly enlarges the support area to the end of the leg.

Depending on the shape of the end of the leg and the footing, the input and operating range of the jack-up barge is already determined.

1 is a cross-sectional view showing a leg end portion to which the footing is integrally coupled. According to the geological structure of the seabed of the offshore power generation complex, an additional device called a footing is installed at the end of the support leg and installed on the sea floor. In case of need (moving the jack-up platform to another seabed, etc.), the method of re-docking the jack-up platform to the shipyard was used to dismantle and replace the permanent bond.

Therefore, it is necessary to manufacture the end of the leg for rock, and to devise a connection part for attaching and detaching the footing.

In an area with good ground conditions, remove the footing and support only at the end of the leg, and if the ground condition is poor, attach and use the footing to greatly increase the utility of the jack-up-barge or temporary offshore structure.

Korean Patent Registration 10-1805482 Republic of Korea Patent 10-1368892 Republic of Korea Registered Utility Model 20-0484978 Republic of Korea Patent Publication 10-2015-0052427

Therefore, the present invention has been devised to solve the conventional problems as described above. According to an embodiment of the present invention, for a jack-up-barge or a temporary offshore structure used in low or medium water depth, depending on the conditions of the seabed ground An object of the present invention is to provide a connecting part structure in which the leg end part and the footing that can be selectively applied can be attached and detached.

And, in the technology of forming a circular hole in the center of the footing and supporting the end of the leg inserted into the hole with a ring and a pin attached to the bottom of the footing, when one side support occurs on the lower surface of the footing, the inclination of the leg inserted into the hole is When excessive stress concentration occurs while increasing, the main path through which the unilateral load acting on the footing is transmitted to the leg is limited to the three areas where the lower support ring and the leg and the footing come into contact, which solves the problem of large stress concentration. that has its purpose.

According to an embodiment of the present invention, since the scope of application limited according to the ground conditions can be overcome, the scope of application of a jack-up barge or a temporary offshore structure can be greatly expanded. An object of the present invention is to provide a structure and a connection method.

On the other hand, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly to those of ordinary skill in the art to which the present invention belongs from the description below. can be understood

A first object of the present invention, a support leg having a hollow inside while supporting a temporary offshore structure or a jack-up barge; Footing with a central hole into which the end of the leg can be inserted; a lower support member protruding inwardly from the outer peripheral surface of the lower end of the center hole of the footing to support the lower end of the inserted end of the leg; and an upper support member protruding from one side of the outer surface of the leg end so that the upper end of the central hole of the footing is restrained while the leg end is inserted into the footing. It can be achieved as a joint structure of the expression foot and the leg.

And, by the upper support member, it may be characterized in that the unilateral load is distributed when the unilateral load is applied.

In addition, the lower support member may be characterized in that it is configured in a ring shape.

And the upper support member may be characterized in that it is configured in a ring shape.

In addition, it may be characterized in that it comprises a detachable means configured to attach and detach the footing with respect to the end of the leg.

And the attachment means, a plurality of insertion holes formed on one side of the inner surface where the central hole of the footing is formed, a plurality of connection holes formed on one side of the outer surface of the end of the leg, the insertion hole and a pin inserted into the connection hole It may be characterized in that it comprises a.

In addition, when the footing is coupled, the end of the leg is inserted and seated in the central hole of the footing, and then the pin is inserted into the insertion hole and the connection hole at a position corresponding thereto to attach the footing to the end of the leg. and, when the footing is removed, the pin is detached to separate the footing from the end of the leg.

And it may be characterized by further comprising a reinforcing member provided in the footing inner space and a reinforcing member provided in the leg hollow.

In addition, it may be characterized in that it further comprises a load sensing unit provided on one side of the end of the leg to measure the one-sided load applied to the leg.

And when the unilateral load measured by the load sensing unit exceeds a set range, it may further include a notification means for transmitting the unilateral load excess information to the set user terminal side.

A second object of the present invention is the first step of identifying the seabed ground condition; a second step of inserting and seating the end of the leg in the central hole of the footing when the seabed ground condition is poor; In a state in which the leg end is inserted into the footing, the lower end of the inserted leg end is supported by a ring-shaped lower support member protruding inwardly from the lower outer peripheral surface of the central hole of the footing, and one side of the outer surface of the leg end portion a third step in which the upper end of the center hole of the footing is constrained by a ring-shaped upper support member protruding from the; a fourth step of coupling the footing and the end of the leg by means of attachment and detachment; And a fifth step of seating the leg to which the footing is coupled on the seabed; can be achieved as a method of connecting the leg and the detachable footing supported by a double ring, characterized in that it comprises a.

And when the seabed ground condition is good, the footing may be detached from the end of the leg by the detachment means, and the end of the leg may be seated on the seabed.

In addition, when a unilateral load is applied, the path through which the unilateral load is transmitted to the leg may be characterized in that the upper support member, the lower support member, and the portion where the leg end and the footing contact are distributed.

According to the connection structure and connection method of the detachable footing and the leg supported by the double ring according to the embodiment of the present invention, for the jack-up-barge or temporary offshore structure used in low or medium water depth, the conditions of the seabed ground It has an effect that can be selectively applied according to the

And, in the technology of forming a circular hole in the center of the footing and supporting the end of the leg inserted into the hole with a ring and a pin attached to the bottom of the footing, when one side support occurs on the lower surface of the footing, the inclination of the leg inserted into the hole is If excessive stress concentration occurs while increasing, the main path through which the unilateral load acting on the footing is transmitted to the leg is limited to the three areas where the lower support ring and the leg and the footing come into contact, so the problem of large stress concentration can be solved. have an effect

According to the connection structure and connection method of the detachable footing and the leg supported by the double ring according to the embodiment of the present invention, it is possible to overcome the scope of application limited according to the ground conditions, so the scope of application of the jack-up-barge or temporary offshore structure has the advantage of being greatly expanded.

On the other hand, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be able

The following drawings attached to the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention, so that the present invention is limited only to the matters described in those drawings and should not be interpreted.
1 is a cross-sectional view of the end of the leg to which the footing manufactured integrally is coupled;
2 is a flowchart of a method for connecting a detachable footing and a leg supported by a double ring according to an embodiment of the present invention;
3A is an exploded cross-sectional view of a detachable leg-footing connection structure supported by a lower support ring on the lower surface of the footing and installed with a pin;
Figure 3b is a coupling cross-sectional view of a detachable leg-footing connection structure supported by a lower support ring on the lower surface of the footing and installed with a pin;
Figure 3c is the main resistance mechanism of the leg-footing connection structure supported by the lower support ring on the lower surface of the footing under load on one side in Figure 3b and the pins are installed;
4 is an exploded cross-sectional view of a connection structure between a detachable footing supported by a double ring and a leg according to an embodiment of the present invention;
5 is a combined cross-sectional view of a connection structure of a detachable footing and a leg supported by a double ring according to an embodiment of the present invention;
Figure 6 is a resistance mechanism of the connection structure of the detachable footing and the leg supported by a double ring according to an embodiment of the present invention under load on one side;
7A and 7B are a detachable leg-footing connection structure supported by a lower support ring on the lower surface of the footing and provided with pins, and stress concentration and deformation thereof;
8A and 8B show a connection structure of a detachable footing and a leg supported by a double ring according to an embodiment of the present invention under load on one side, and stress concentration and deformation thereof.

The above objects, other objects, features and advantages of the present invention will be easily understood through the following preferred embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed subject matter may be thorough and complete, and that the spirit of the present invention may be sufficiently conveyed to those skilled in the art.

In this specification, when a component is referred to as being on another component, it means that it may be directly formed on the other component or a third component may be interposed therebetween. In addition, in the drawings, the thickness of the components is exaggerated for effective description of the technical content.

Embodiments described herein will be described with reference to cross-sectional and/or plan views, which are ideal illustrative views of the present invention. In the drawings, thicknesses of films and regions are exaggerated for effective description of technical content. Accordingly, the shape of the illustrative drawing may be modified due to manufacturing technology and/or tolerance. Therefore, embodiments of the present invention are not limited to the specific form shown, but also include changes in the form generated according to the manufacturing process. For example, the region shown at right angles may be rounded or have a predetermined curvature. Accordingly, the regions illustrated in the drawings have properties, and the shapes of the illustrated regions in the drawings are intended to illustrate specific shapes of regions of the device and not to limit the scope of the invention. In various embodiments of the present specification, terms such as first, second, etc. are used to describe various components, but these components should not be limited by these terms. These terms are only used to distinguish one component from another. Embodiments described and illustrated herein also include complementary embodiments thereof.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the terms 'comprises' and/or 'comprising' do not exclude the presence or addition of one or more other components.

In describing the specific embodiments below, various specific contents have been prepared to more specifically describe the invention and help understanding. However, a reader having enough knowledge in this field to understand the present invention may recognize that it can be used without these various specific details. In some cases, it is mentioned in advance that parts that are commonly known and not largely related to the invention are not described in order to avoid confusion without any reason in describing the present invention.

Hereinafter, a connection structure between the detachable footing and the leg supported by a double ring according to an embodiment of the present invention will be described.

First, Figure 2 shows a flow chart of a method of connecting a detachable footing and a leg supported by a double ring according to an embodiment of the present invention.

3A is an exploded cross-sectional view of a detachable leg-footing connection structure supported by a lower support ring on a lower surface of the footing and provided with a pin. And FIG. 3b is a cross-sectional view of a detachable leg-footing connection structure supported by a lower support ring on the lower surface of the footing and installed with pins, and FIG. The main resistance mechanism of this installed leg-footing connection structure is shown.

And Figure 4 shows an exploded cross-sectional view of the connection structure of the leg and the detachable footing supported by a double ring according to an embodiment of the present invention, Figure 5 is a detachable ring supported by a double ring according to an embodiment of the present invention It shows a cross-sectional view of the coupling structure of the formula footing and the leg. In addition, FIG. 6 shows the resistance mechanism of the connection structure of the detachable footing and the leg supported by a double ring according to an embodiment of the present invention when one side is loaded.

7A and 7B show a detachable leg-footing connection structure supported by a lower support ring on the lower surface of the footing and provided with a pin and stress concentration and deformation therefor, and FIGS. 8A and 8B are unilateral loading of the present invention The connection structure of the detachable footing and the leg supported by the double ring according to the embodiment, and the stress concentration and the degree of deformation thereof are shown.

A detachable footing and leg connection structure 100 supported by a double ring according to an embodiment of the present invention supports a temporary marine structure or a jack-up barge while supporting a support leg having a hollow therein, and a leg end 10 A lower support supporting the lower end of the footing 20 having a central hole 21 into which can be inserted, and the leg end 10 protruding inwardly from the outer peripheral surface of the lower end of the central hole 21 of the footing 20 It is configured to include a ring (22).

The insertion part 11 may be formed on the lower surface of the leg end part 10 so as to penetrate into the sea floor, and a plurality of reinforcing members 14 may be installed in the leg hollow part. And the reinforcing material 24 may be installed in the inner space of the footing 20 .

In addition, it is configured to include a detachable means configured to attach and detach the footing 20 with respect to the leg end (10).

More specifically, the attachment/detachment means according to an embodiment of the present invention includes a plurality of connection holes 23 formed on one side of the inner surface in which the central hole 21 of the footing 20 is formed, and the outer surface of the leg end portion 10 on one side. It may be configured to include the formed plurality of insertion holes 13 and the pins 30 inserted into the insertion holes 13 and the connection holes 23 .

Therefore, when the footing 20 is coupled, the leg end 10 is inserted and seated in the central hole 21 of the footing 20, and then a pin is inserted into the insertion hole 13 and the connection hole 23 at the corresponding position. (30) is inserted to attach the footing 20 to the leg end 10, and when the footing 20 is removed, the pin 30 is detached to separate the footing 20 from the leg end 10. is configured to

In addition, the connection structure 100 of the detachable footing and the leg supported by the double ring according to the embodiment of the present invention is different from the connection structure shown in FIGS. 3A to 3C, as shown in FIGS. 4 to 6 . , it can be seen that the upper support ring 12 is further included.

The upper support ring 12 is formed to protrude from one side of the outer surface of the leg end 10 so that the upper end of the central hole of the footing 20 is restrained in a state where the leg end 10 is inserted into the footing 20 .

By such an upper support ring 12, when a one-sided load is applied, it is possible to distribute the one-sided load compared to the case in which only the lower support ring 22 is provided.

In addition, the load sensing unit is provided on one side of the leg end 10 and may be configured to measure the unilateral load applied to the leg in real time after installation.

In addition, the unilateral load measured by the load sensing unit may be configured to be able to check real-time through an external PC, display means, and user terminal. It may be configured to transmit information to a set user terminal or the like.

3A, 3B, and 7A, a circular central hole 21 is formed in the center of the footing 20, and the leg end 10 inserted into the central hole 21 is inserted into the footing 10 ) In the case of supporting only the lower support ring 22 and the pin 30 attached to the lower part, when one side support occurs on the lower surface of the footing 20, the inclination of the end of the leg 10 inserted into the central hole 21 is If excessive stress concentration occurs while increasing, in this way, as shown in FIGS. 3C and 7B , the main path through which the unilateral load acting on the footing 20 is transmitted to the leg is the lower support ring 22 and the end of the leg. It is limited to three parts where the part 10 and the footing 20 are in contact. For this reason, a large stress concentration occurs.

In the embodiment of the present invention, by further applying the upper support ring 12, it is possible to solve the above problem while simply supplementing this problem.

That is, in the embodiment of the present invention, as shown in FIGS. 4 and 5 and 8A , in the state in which the leg end 10 is inserted, the top of the leg end 10 on the upper side of the central hole 21 is on the surface. The support ring 12 is installed so that the load can be distributed and transmitted to the footing 20 . Additionally, in order to improve the binding force between the leg end 10 and the footing 20 and to connect the footing 20 integrally when removing the footing 20 from the seabed, the connection hole 23 of the footing 20 and the leg end The pin 30 for connecting the insertion hole 13 of the part 10 is installed.

Therefore, as shown in FIGS. 6 and 8B, the main paths through which the one-sided load acting on the footing 20 is transmitted to the leg is the upper support ring 12, the lower support ring 22, and the leg end 10 and It can be seen that the footing 20 is increased to four parts in contact.

Hereinafter, a method for connecting a detachable footing supported by a double ring and a leg according to an embodiment of the present invention will be described.

First, the seabed ground condition is identified (S1). As a result of examining the seabed ground conditions, if the seabed ground is good, if it corresponds to the rocky ground, the end of the leg 10 is seated on the seabed ground.

At this time, when the footing 20 is attached to the leg end 10, after removing the pin 30 to detach the footing 20 from the leg end 10 (S20), the leg end 10 ) is reinforced from the inside and the leg end 10 is seated on the seabed ground through the insert 11 at the lower end (S30).

On the other hand, when the seabed ground condition is poor, that is, when it corresponds to a soft ground, the leg end 10 is inserted and seated in the central hole 21 of the footing 20 (S21).

And in a state in which the leg end 10 is inserted into the footing 20, the inserted leg end portion ( 10) The lower end is supported.

At the same time, the upper end of the central hole 21 of the footing 20 is restrained and supported by the upper support ring 12 protruding from one side of the outer surface of the leg end 10 (S22).

The footing 20 and the leg end 10 are coupled to each other by a detachable means (S23). As mentioned above, the pin 30 is inserted into the connection hole 23 of the footing 20 and the insertion hole 13 of the leg end 10 to combine the footing 20 and the leg end 10 . will make it

And the leg end 10 to which the footing 20 is coupled is seated on the sea floor (S24).

Therefore, when a unilateral load is applied, the path through which the unilateral load is transmitted to the leg can be distributed to the area where the upper support ring 12 and the lower support ring 22 and the leg end 10 and the footing 20 come into contact with each other. .

In addition, in the apparatus and method described above, the configuration and method of the above-described embodiments are not limitedly applicable, but all or part of each embodiment is selectively combined so that various modifications can be made to the embodiments. may be configured.

10: leg end
11: Insertion part
12: upper support ring
13: insertion hole
14: reinforcing member
20: Putting
21: Concourse
22: lower support ring
23: connection hole
24: reinforcing material
30: pin
100: Connection structure of detachable footing and leg supported by a double ring

Claims (13)

a support leg having a hollow portion therein while supporting a temporary offshore structure or a jack-up barge;
Footing with a central hole into which the end of the leg can be inserted;
a lower support member protruding inwardly from the outer peripheral surface of the lower end of the center hole of the footing to support the lower end of the inserted end of the leg; and
In a state in which the end of the leg is inserted into the footing, an upper support member protruding from one side of the outer surface of the end of the leg so that the upper end of the center hole of the footing is restrained; Footing and leg connection structure.
The method of claim 1,
A connection structure of a detachable footing and a leg supported by a double ring, characterized in that by the upper support member, the unilateral load is distributed when a unilateral load is applied.
3. The method of claim 2,
The lower support member is a connection structure of a detachable footing and a leg supported by a double ring, characterized in that it is configured in a ring shape.
4. The method of claim 3,
The upper support member is a connection structure of a detachable footing and a leg supported by a double ring, characterized in that it is configured in a ring shape.
The method of claim 1,
and detachable means configured to attach and detach the footing with respect to the end of the leg.
6. The method of claim 5,
The detachable means,
A plurality of insertion holes formed on one side of the inner surface where the central hole of the footing is formed, a plurality of connection holes formed on one side of the outer surface of the end of the leg, and a pin inserted into the insertion hole and the connection hole. A connection structure of a detachable footing and leg supported by a double ring.
7. The method of claim 6,
When the footing is coupled, the end of the leg is inserted and seated in the central hole of the footing, and then the pin is inserted into the insertion hole and the connection hole at a position corresponding thereto to attach the footing to the end of the leg,
When the footing is removed, the pin is detached to separate the footing from the end of the leg.
The method of claim 1,
The connection structure of the detachable footing and the leg supported by a double ring, characterized in that it further comprises a reinforcing member provided in the inner space of the footing and a reinforcing member provided in the leg hollow.
8. The method of claim 7,
The connection structure of the detachable footing and the leg supported by a double ring, characterized in that it is provided on one side of the end of the leg and further comprises a load sensing unit for measuring a unilateral load applied to the leg.
10. The method of claim 9,
When the unilateral load measured by the load sensing unit exceeds the set range, the detachable footing and leg supported by the double ring, characterized in that it further comprises a notification means for transmitting the unilateral load excess information to the set user terminal side connection structure.
A first step of identifying the seabed ground condition;
a second step of inserting and seating the end of the leg in the central hole of the footing when the seabed ground condition is poor;
In a state in which the leg end is inserted into the footing, the lower end of the inserted leg end is supported by a ring-shaped lower support member protruding inwardly from the lower outer peripheral surface of the central hole of the footing, and one side of the outer surface of the leg end portion a third step in which the upper end of the center hole of the footing is constrained by a ring-shaped upper support member protruding from the top;
a fourth step of coupling the footing and the end of the leg by means of attachment and detachment; and
A method of connecting a detachable footing and a leg supported by a double ring, comprising a; a fifth step of seating the leg to which the footing is coupled on the seabed.
12. The method of claim 11,
When the seabed ground condition is good, the detachable footing supported by a double ring and the leg connection method, characterized in that the footing is detached from the leg end by the detachable means and the leg end is seated on the sea floor .
12. The method of claim 11,
When a unilateral load is applied, the path through which the unilateral load is transmitted to the leg is a detachable footing supported by a double ring, characterized in that it is distributed to a portion where the upper support member, the lower support member, and the end of the leg and the footing come into contact with each other. How to connect the legs.

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