KR20160059570A - Suction bucket foundation for decreasing resistance of seawater and adjusting verticality, installing and lifting method - Google Patents

Suction bucket foundation for decreasing resistance of seawater and adjusting verticality, installing and lifting method Download PDF

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Publication number
KR20160059570A
KR20160059570A KR1020140161055A KR20140161055A KR20160059570A KR 20160059570 A KR20160059570 A KR 20160059570A KR 1020140161055 A KR1020140161055 A KR 1020140161055A KR 20140161055 A KR20140161055 A KR 20140161055A KR 20160059570 A KR20160059570 A KR 20160059570A
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South Korea
Prior art keywords
opening
suction
suction foundation
seawater
foundation
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KR1020140161055A
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Korean (ko)
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KR101672595B1 (en
Inventor
이규열
지성현
최재형
김동준
윤준웅
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현대건설주식회사
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Publication of KR20160059570A publication Critical patent/KR20160059570A/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/52—Submerged foundations, i.e. submerged in open water
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/20—Placing by pressure or pulling power
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/0073—Details of sea bottom engaging footing
    • E02B2017/0078—Suction piles, suction cans

Abstract

The present invention relates to a suction bucket foundation for decreasing seawater resistance and adjusting verticality, and an installing method and lifting method thereof. To this end, the present invention may provide the suction bucket foundation which includes a main body having an upper part closed with an upper plate, a lower part configured to have an opened hollow column shape, and a column surface configured to have a skirt part penetrated into the seabed wherein the upper plate is configured to be able to be opened and closed and the upper plate is opened when the main body moves in the seawater. Thereby, the present invention has an effect of decreasing the resistance to the seawater in a vertical direction generated when the suction bucket foundation is installed and lifted.

Description

Technical Field [0001] The present invention relates to a suction basin, a method of installing the suction basin, and a method of lifting the suction basin,

The present invention relates to a suction foundation, a method of installing the suction foundation, and a lifting method for reducing the resistance of the sea water and adjusting the vertical degree.

The foundation of the marine uses mono files, suction bases, gravity bases and jacket bases. Suction Bucket Foundation is a file installed by using the pressure difference between the inside and outside of the file generated by discharging the fluid such as water or air inside the file to the outside. It is used in submarine floors and is used for marine fixed and floating structure supports or anchors, such as oil drilling platforms, offshore wind power bases. 1 is a conceptual view showing a penetration state of a conventional suction foundation as a longitudinal section. As shown in Fig. 1, the shape of the suction foundation 1 has a shape in which the upper end is closed by the upper plate and the lower end of the cup is opened so that suction pressure can be easily applied. The largest of the foundations (1) constructed to date is 32m in diameter and 37m in length, and is constructed on a 300m deep sea floor and used as the basis for oil drilling platforms. At this time, the suction foundation 1 may be provided with a discharge port and an injection port on the top plate or side surface of the upper part for discharging and injecting seawater, and a ring for use as a point of application in drawing can be provided at the center or side of the upper part.

1, the installation mechanism of the suction foundation 1 is as follows. When the suction foundation 1 is seated on the seabed layer 40, the lower end of the file is intruded to the seabed layer 40 to a certain depth by the weight of the file. In this state, seawater in the suction foundation (1) is drained to the outside by using a drainage device installed on the head of the suction foundation (1). Since the structure of the suction foundation 1 except for the lower end of the pile is completely blocked by the flow of seawater, the drained sea water can flow only through the seabed layer 40 at the lower end of the suction foundation 1. However, since the permeability of the seabed ground is very low, the drainage water is prevented from being introduced and recovered, so that the pressure inside the suction foundation 1 is lower than the pressure outside the suction foundation 1. As a result, a pressure difference between the inside and the outside of the suction foundation 1 is generated, thereby causing the suction foundation 1 to be intruded.

These suction bases are ① installed equipment at the maximum depth of 1600m without being restricted by water depth, ② installation is possible irrespective of the size of the suction foundation, and the larger the upper plate area, (3) It is possible to install at one time in a few hours, (4) It is possible to pull out with a positive pressure generated by injecting water into the suction foundation, so that it can be easily removed and reused if necessary. There is an advantage that the penetration resistance is reduced by the seepage of the submarine bed at the bottom of the suction foundation.

In addition, the structure using such a suction foundation can be carried out regardless of the depth of water, (2) it can be installed in a short time, and (4) the large-scale foundation can be installed in the seabed, , The suction pressure is generated in the suction foundation by drawing, and this suction pressure acts as a resistance force (or ground force), which increases the stability due to insertion. 4) It is necessary to improve the ground (In particular, there is a soft ground in the surface layer and a glass layer in the lower layer which is sandy soil in the lower layer), and (5) it is possible to carry out the preceding loading and loading experiments using the suction pressure after installation.

Korean Patent Publication No. 10-2009-0102472 US registered patent 6,481,932 European patent 02216447 Korean Patent No. 10-1352095

However, since the conventional suction bases must pass through a considerable depth of water until they are placed on the sea floor, there is a problem in that the suction foundation is lowered due to resistance to seawater, . Suction penetration may not be possible if the suction foundation is tilted vertically at the bottom of the ocean floor. Further, there is a problem that the additional process and the construction cost are increased in order to perform the vertical correction after the construction, and the equipment input is also very difficult.

Also, when the suction foundation is lifted up to the water surface after the drawing, a resistance due to seawater is acted on, resulting in difficulty in lifting the suction foundation. These problems cause cost and air increase in lifting.

Accordingly, the present invention has been made to solve the above-described problems.

An object of the present invention is to minimize the resistance to seawater generated during installation and lifting of a suction foundation, and to allow the top plate of the suction foundation to be opened when the suction foundation is moved so as to facilitate verticality at the time of installation of the suction foundation And to provide a suction foundation, a method for installing the suction foundation, and a lifting method.

Hereinafter, specific means for achieving the object of the present invention will be described.

An object of the present invention is to provide an air conditioner comprising a main body composed of an upper portion covered with an upper plate, a lower portion formed in an open hollow columnar shape, and a columnar surface penetrating into a seabed ground; An opening which is a hole formed in at least a part of at least one of the upper plate and the skirt portion; And a closing plate configured to close the opening and configured to enable opening and closing of the opening, wherein when the main body is moved in seawater, the opening is opened by the movement of the closing plate As shown in Fig.

Or the opening is formed in at least a part of the top plate, the closing plate is configured to slide in parallel with the top plate, and when the main body is moved in seawater, the opening of the opening by the sliding of the closing plate .

Or the opening is formed in at least a part of the upper plate, the closing plate is configured in a form of a hinged pivot about a hinge axis formed at one side of the closing plate, and when the body is moved in seawater, And the opening is opened by pivoting about the hinge axis.

Or the opening is formed in at least a part of the skirt portion, the closing plate is configured to slide in parallel with the column surface of the skirt portion, and when the main body is moved in seawater, .

Or the opening is formed in at least a part of the skirt portion, and the closing plate is constituted by a hinge form which is rotated around a hinge axis formed at one side of the closing plate, and when the body is moved in seawater, And the opening is opened by pivoting about the hinge axis.

Or the opening is formed in an arc shape having a central angle of the center of the upper plate and an internal angle of a certain angle, the closing plate being configured to slide with the center of the upper plate as an axis, The opening of the opening may be opened by sliding the closing plate.

A sensor unit for sensing at least one of bottom surface of the main body of the main body and bottom surface drawing of the main body to generate an upper panel open signal; And a driving unit connected to the sensor unit and the closing plate to drive the sliding plate to open the opening plate when the sensor unit receives the top plate opening signal.

Or a hollow buoyancy means in which a low density fluid having a density lower than that of seawater is received and which is provided at the top of the body, wherein the buoyancy means is arranged such that the low density fluid flows in a direction To be moved.

Or the buoyancy means is constituted by a toroidal type and is configured to surround the outside of the top plate and is divided into a plurality of zones of equal length and a pump is constituted between the zone and the zone of the buoyancy means, And the upper plate is moved in a tilted direction within the buoyancy means.

An object of the present invention is to provide a water treatment system comprising a main body composed of a top portion covered with a top plate, a bottom portion formed of an open hollow columnar shape, and a columnar surface penetrating into a seabed ground; And a connecting portion connecting the upper plate and the skirt portion so that the upper plate and the skirt portion can be separated and combined with each other. When the body is moved in seawater, the upper plate and the skirt portion are separated, Wherein the suction opening is opened when the suction opening is opened.

An object of the present invention is to provide a method of installing a suction foundation, comprising the steps of: opening the opening, which is a constituent of the suction foundation; A descending step in which the suction foundation is lowered from the seawater to a predetermined installation position of the sea floor; A grounding step in which the suction foundation is mounted on a seabed surface; And a closing step of closing the opening, wherein the opening step is closed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of installing a suction foundation, comprising the steps of: opening the opening, which is a constituent of the suction foundation, by sliding a closing plate, A descending step in which the suction foundation is lowered from the seawater to a predetermined installation position of the sea floor; A grounding step in which the suction foundation is mounted on a seabed surface; And a closing step of sliding the closure plate so that the opening is closed.

An object of the present invention is to provide a method of installing a suction foundation, the method comprising: a roughing step in which the suction foundation is set on a seabed surface while the vertical degree of the suction foundation is inclined; A verticality correction step in which the low density fluid accommodated in the buoyancy means, which is one component of the suction foundation, is moved in a direction in which the suction foundation is inclined in the buoyancy means to correct the verticality of the suction foundation; And a suction step in which suction pressure is applied to the inside of the suction foundation after the verticality of the suction foundation is corrected by the buoyancy means.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of lifting a suction foundation provided on the seabed surface, in which seawater is injected into the interior of the suction foundation in a state in which the openings as one component of the suction foundation are closed, A drawing step; An opening step in which the opening is opened; And a lifting step in which the suction foundation is lifted vertically upward in the seawater.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of lifting a suction foundation provided on the seabed surface, in which seawater is injected into the interior of the suction foundation in a state in which the openings as one component of the suction foundation are closed, A drawing step; An opening step in which the closing plate, which is a constitution of the suction foundation, is slid to open the opening; And a lifting step in which the suction foundation is lifted vertically upward in the seawater.

As described above, the present invention has the following effects.

First, according to an embodiment of the present invention, there is an effect that resistance against vertical seawater generated during installation and lifting of a suction foundation is reduced. As the resistance to the vertical direction seawater is reduced, the descent rate is maintained smoothly, and the suction foundation can be stably installed and lifted with less cost.

Secondly, according to the embodiment of the present invention, there is an effect that the problem of difficulty in stable installation due to the swinging of the suction foundation at the time of installation of the suction foundation is solved.

Thirdly, when an air bag according to an embodiment of the present invention is used, an effect that the verticality can be easily adjusted at the time of installation of the suction foundation is generated. Conventionally, there has been used a method of adjusting the vertical degree after installation of the suction foundation, and this method has resulted in considerably low precision and considerably high cost. However, according to the present invention, do.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and, together with the description, And shall not be interpreted.
1 is a conceptual view showing a penetration state of a conventional suction foundation as a longitudinal section,
2 is a perspective view of a suction foundation according to an embodiment of the present invention,
3 is a plan view of a suction foundation according to an embodiment of the present invention,
4 is a side view of a suction foundation according to one embodiment of the present invention,
5 is a perspective view showing a suction foundation to which a hinged top plate is applied according to a modification of the present invention,
6 is a perspective view showing a suction foundation to which a hinged top plate is applied according to a modification of the present invention,
7 is a perspective view showing a suction foundation to which a separation type top plate is applied according to a modification of the present invention,
8 is a perspective view showing a suction foundation to which a slide skirt is applied according to a modification of the present invention,
9 is a perspective view showing a suction foundation to which a hinged skirt portion is applied according to a modification of the present invention,
10 is a schematic view showing a method of installing a suction foundation according to an embodiment of the present invention,
11 is a schematic view showing a descent of a suction foundation in which a hinged skirt portion according to a modification of the present invention is used,
12 is a schematic view showing a lifting method of a suction foundation according to an embodiment of the present invention,
13 is an installation flowchart showing the flow of a method of installing a suction foundation using an airbag according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following detailed description of the operation principle of the preferred embodiment of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention.

The same reference numerals are used for portions having similar functions and functions throughout the drawings. Throughout the specification, when a part is connected to another part, it includes not only a case where it is directly connected but also a case where the other part is indirectly connected with another part in between. In addition, the inclusion of an element does not exclude other elements, but may include other elements, unless specifically stated otherwise.

Suction Foundation

FIG. 2 is a perspective view of a suction foundation according to one embodiment of the present invention, FIG. 3 is a plan view of a suction foundation according to an embodiment of the present invention, FIG. 4 is a perspective view of a suction structure according to an embodiment of the present invention, Fig. 2, 3 and 4, the suction foundation 1 according to an embodiment of the present invention may include a main body and an auxiliary device.

The main body can be constituted in a cylindrical shape in which the upper part is closed by the upper plate 5 and the lower part is opened, as in the case of a normal suction foundation. The upper plate 5 may be formed in a plate-like shape or may be formed in various shapes such as a dome shape. The columnar wall of the column may consist of a skirt portion 3, commonly referred to as a skirt. Also, in order to perform the purpose and function of a conventional suction foundation, the discharge port and the injection port may be provided on the top plate or the side surface for discharging and injecting seawater, and a ring for use as a point of action have. An auxiliary device for assisting the installation and lifting of the suction foundation 1 may be formed on the upper plate 5. [

The auxiliary device according to an embodiment of the present invention may include an open top plate and an air bag.

The open top plate may include an opening 10 and a closing plate 12 formed on the top plate. The open mouth 10 is a hole of a specific size formed in the upper plate 5 and induces free passage of seawater to reduce resistance to seawater. In this opening 10, a closing plate 12 configured to close the opening 10 can be constructed.

The opening 10 may be configured to occupy at least a part of the top plate 5. [ The shape of the opening 10 has an angle between a certain angle (60 degrees in the embodiment of the present invention) as shown in Figs. 2, 3 and 4, . When the opening 10 is formed in an arc shape, the closing plate 12 can be easily realized in a sliding manner. In addition, when the opening 10 is formed in an arc shape and the closing plate 12 is realized as a sliding type, the effect of enabling the closing of the suction plate 1 to withstand the suction pressure when applying the suction of the suction base 1 occurs. In addition, although a casual shovel using a hinge on an open top plate can be proposed by a conventional technician, there is a problem that when the suction pressure is applied, the open top plate may be sucked and damaged inward of the suction base 1, When the opening 10 is formed in an arc shape and the closing plate 12 is realized as a sliding type, the strength in the vertical direction is remarkably strong, so that there is an extremely small risk that the open top plate is broken at the time of applying the suction pressure do.

The closing plate 12 is constituted by a plate-shaped member having a larger area than the opening 10 and configured to be rotatable about the center of the upper plate 5 at the upper or lower portion of the opening 10 . The opening / closing of the upper plate 5 can be determined by the rotation of the closing plate 12. [

(Not shown) for driving the rotation of the closing plate 12 can be further configured. This driving means is a means for driving the rotation of the closing plate 12 in accordance with the control of the constructor by being connected with control means on the sea or onshore by wire or wirelessly. The driving means is preferably a pneumatic-pressure motor connected to the rotation axis of the closing plate 12, and may be constituted by an electric motor or a pneumatic-pressure jack and a gear bundle.

The closing plate 12 may be configured on the upper or lower portion of the upper plate 5. [ Particularly, when the closing plate 12 is formed on the upper surface of the upper plate 5, it is easy to withstand the downward force due to the suction pressure, and the effect of ensuring the closing of the upper plate 5 have. In addition, in the construction in which the drawing and penetration of the suction foundation 1 are repeated, it may not be important where the closing plate 12 is positioned above and below the upper plate 5. In the drawings of the present specification, the closing plate 12 is shown as being configured at the lower part of the top plate 5 according to an embodiment of the present invention for the sake of understanding.

Further, with respect to the modified example of the drive means, it can be configured to independently drive the rotation of the closing plate 12 through signals from various sensors regardless of the control of the constructor. As the sensor that can be configured in the modified example of the driving means, an acceleration sensor, a pressure sensor, a pressure gauge, a gravity sensor, or the like can be used.

When the acceleration sensor is used together with the driving means, the driving means is operated so that the opening of the closing plate 12 is maintained in the section where the suction foundation 1 is lowered, and the suction foundation 1 is lowered, The driving means is actuated so as to close the closing plate 12 in the section where the acceleration of the suction foundation 1 instantaneously has a vertical upward acceleration of a certain magnitude or more and is regarded as a bottom surface of the suction foundation 1, When the acceleration has a vertical acceleration of 0 or more at an acceleration of 0, the driving means can be operated so that the closing plate 12 is considered to be the drawing of the suction foundation 1 and the closing plate 12 is opened.

In the case where a pressure sensor is used together with the driving means, a pressure sensor may be provided at the end or the side of the skirt portion 3 of the suction foundation 1. When the pressure measured by the pressure sensor is suddenly increased beyond the seawater pressure, the driving means is operated so that the closing plate 12 is regarded as a bottom surface of the suction foundation 1, When the pressure is restored, the driving means can be operated so as to regard the suction base 1 as a draw and open the closing plate 12.

In the case where a hydraulic pressure system is used together with the drive means, the hydraulic pressure in the sea floor is predicted based on the submarine depth information of the predetermined installation foundation (1), and the hydraulic pressure value is gradually increased and the value near the predicted hydraulic pressure value When the water pressure value is measured and fixed in the hydraulic system, the driving means is operated so as to be regarded as a bottom surface of the suction foundation 1 and the closing plate 12 is closed. In the case where the water pressure value is gradually decreased, And the driving means can be operated so that the closing plate 12 is opened.

In the case where the gravity sensor is used together with the driving means, the gravity value on the sea floor is predicted based on the gravity survey information at the construction site (1) and the submarine depth information of the construction site, When the value in the vicinity of the predicted gravity value increases and is measured and fixed by the gravity sensor, the driving means is operated so that the closing plate 12 is regarded as a bottom surface of the suction foundation 1 and the closing means 12 is closed. The driving means can be operated so as to regard the suction base 1 as a draw and open the closing plate 12. [

The airbag 20 may be configured to surround the outside of the upper plate 5 at the upper portion of the suction foundation 1. [ The airbag 20 is configured to maintain the verticality of the suction foundation 1, and the air of the airbag 20 is moved in the direction of correcting the vertical degree according to the vertical degree variation when the suction foundation 1 is lowered and installed . The airbag 20 is divided into a plurality of compartments and at least one pump (not shown) is constituted so that the air in one side of the airbag 20 is supplied to the airbag 20 20). ≪ / RTI > It is possible to drive the airbag 20 using a suction pump (not shown) and at least one valve (not shown) that are used in conventional suction bases, without further configuring a separate pump.

As an auxiliary device that can be used together with the airbag 20, a gyro sensor or the like capable of determining the verticality can be further used. When the gyro sensor is used together with the airbag 20, an effect that enables the verticality of the suction foundation 1 to be automatically corrected can be obtained.

The effect of correcting the verticality at the time of installation of the suction foundation 1 generated by the airbag 20 is basically a remarkable effect in that the cost for correcting the verticality of the suction foundation 1 is considerably reduced , And the role of correcting the verticality when the suction foundation 1 is lowered by the airbag 20 maintains the vertical degree at the time of descent, thereby maintaining a minimum resistance by the sea water. .

With respect to the modified example of the open top plate, (1) a hinged top plate, (2) a top and bottom slide top plate, (3) a slide skirt, and (4) a hinged skirt can be proposed.

5 is a perspective view showing a suction foundation to which a hinged top plate is applied according to a modification of the present invention. According to a modification of the present invention, the suction foundation to which the hinged top plate is applied may be configured such that at least one closure plate 12 is formed on the upper plate, and the closure plate 12 is vertically rotated about one axis or multiple axes. The hinge shaft 30 is formed at the center of the upper plate 5 and the closing plate 12 can be formed on both sides of the hinge axis 30 have. When the suction base 1 descends in water, the closing plate 12 is naturally rotated upward by the resistance of the seawater to the center of the hinge shaft 30 to open the upper plate 5, When the bottom surface is approached, it is possible to naturally rotate downward about the hinge axis 30 by gravity to close the top plate 5. [

The hinge shaft 30 formed at the center of the upper plate 5 may include a fixed plate member 32 having a specific width and a hinge shaft 30 is formed on both sides of the plate member 32 So that the closing plate 12 can be engaged. 6 is a perspective view showing a suction foundation to which a hinged top plate is applied according to a modification of the present invention. As shown in Fig. 6, the structure of the plate member 12 of the present invention has an effect of generating a free space that can constitute a basic member of a suction foundation such as a suction pump.

7 is a perspective view showing a suction foundation to which a separable top plate is applied according to a modification of the present invention. 7, the suction foundation to which the separable top plate is applied is configured such that the upper plate 5 and the skirt portion 3 can be separated from each other, And a slide unit 40 having one end connected to the upper plate 5 and configured to freely slide on the track unit.

Alternatively, the track portion and the slide portion 40 may be replaced by a joint portion having one end connected to the bottom surface of the upper plate 5 and the other end connected to the inside of the skirt portion 3, . The top plate 5 and the skirt portion 3 are connected to each other by the joint portion so that the separation and connection between the top plate 5 and the skirt portion 3 can be naturally accomplished.

In the case of the separation type top plate according to the modified embodiment of the present invention, when the suction foundation 1 descends in water, the upper plate 5 is naturally opened by the resistance against the sea water, the seawater is passed through the openings of the upper plate and the skirt, The upper plate 5 can be naturally closed by gravity when the lower plate 1 is mounted on the sea floor.

With respect to the slide-type skirt portion, FIG. 8 is a perspective view showing a suction base to which the slide-type skirt portion is applied according to a modification of the present invention. 8, a suction foundation 1 to which a slide skirt is applied according to a modification of the present invention is characterized in that an opening 10 is formed in a skirt portion 3 and a closing plate 12 So that the closing plate 12 provided at the opening 10 of the skirt portion 3 is slid and the opening 10 of the opening 10 is determined. The slide type skirt portion includes an opening portion 10 which is a hole formed in a specific size and a specific shape on one side of the skirt portion 3 and a slidable skirt portion 3 which is in contact with the inner or outer side of the skirt portion 3, And a closing plate 12 that is configured to be movable between a closed position and a closed position.

In the case of the slide type skirt according to the modification of the present invention, when the suction foundation 1 moves in water, the closing plate 12 is slid to open the opening 10, and the suction foundation 1 is moved In one case it can be used to slide the closing plate 12 in the opposite direction to close the opening 10. Further, in the case of the slide-type skirt portion, since the opening portion 10 is formed in the skirt portion 3, the effect of not only the vertical movement of the suction foundation 1 but also the resistance by the seawater can be reduced simultaneously.

9 is a perspective view showing a suction foundation to which a hinged skirt portion is applied according to a modified example of the present invention. 9, a suction foundation 1 to which a hinged skirt portion is applied according to a modification of the present invention is characterized in that an opening portion 10 is formed in a skirt portion 3 and a closing plate 12 Is configured to pivot toward the inside and outside of the skirt portion 3 about the hinge axis of the upper portion and can be configured to determine whether the opening portion 10 is opened or closed by the rotation of the closing plate 12. [

In the case of the suction foundation to which the hinge type skirt portion according to the modified embodiment of the present invention is applied, when the suction foundation moves in the left and right direction in the water, the closing plate 12 is naturally rotated by the resistance of the sea water to open the opening portion 10, An effect of reducing the resistance due to the electric field is generated.

Using an open top plate Suction Foundation  Construction method

FIG. 10 is a schematic view showing a method of installing a suction foundation according to an embodiment of the present invention, in connection with a construction method of a suction foundation using an open top plate. The closing plate 12 may be rotationally driven so that the opening 10 of the upper plate 5 is opened when the suction foundation 1 is lowered in the seawater as shown in Fig. The opening of the opening 10 permits the seawater to flow from the open lower portion of the suction foundation 1 and to be discharged through the opening 10. Thus, The effect of reducing the resistance by the area of the opening 10 can be generated. Although not shown in FIG. 10, when the suction foundation 1 is lowered, the vertical degree is adjusted by the airbag, so that the resistance by the seawater can be adjusted to a minimum.

The closing plate 12 can be slid so that the opening 10 of the upper plate 5 is closed when the suction foundation 1 is placed on the sea floor 40 as shown in Fig. It is possible to apply the suction pressure to the internal space of the suction foundation 1 to perform the installation of the suction foundation 1 so that the suction foundation 1 is penetrated into the seabed surface after the opening 10 is closed.

There is a problem that resonance may occur during the descent of the suction foundation when the descent of the suction foundation is merely performed in the vertical direction. To solve this problem, the suction line can be sideways freely dropped after the descending line is drawn to the depth where resonance is expected. In this case, the resistance due to the seawater may act on the skirt portion, which may make it difficult to prevent the resistance by the seawater even with the open top plate according to the embodiment of the present invention. 11 is a schematic diagram showing a descent of a suction foundation in which a hinged skirt portion according to a modification of the present invention is used. As shown in Fig. 11, when the slide-type skirt portion and the hung-type skirt portion according to the modification of the present invention are used, the resistance due to the seawater generated when the side free fall occurs is significantly reduced.

12 is a schematic view showing a method of lifting a suction foundation according to an embodiment of the present invention. 12, in the case of pulling out the suction foundation 1 from the bottom surface 40 for lifting the suction foundation 1, the suction opening 10 is closed inside the suction foundation 1 in a state where the opening 10 is closed The seawater basin 1 which is intruded on the sea floor can be drawn while the seawater is injected at a certain pressure.

After the drawing of the suction foundation 1 is completed as shown in Fig. 12, the suction foundation 1 is lifted vertically upward in a state in which the opening 10 of the upper plate 5 is opened. The seawater can be introduced from the opening 10 into which the seawater is opened and can be discharged through the opened lower portion of the suction foundation 1 by opening the opening 10, The effect of reducing the resistance by the area of the opening 10 can be generated. Also, although not shown in FIG. 6, when the suction foundation 1 is lowered, the vertical degree is adjusted by the airbag, so that the resistance by the seawater can be adjusted to a minimum.

Using airbags Suction Foundation  How to install

13 is an installation flowchart showing the flow of a method of installing a suction foundation using an airbag according to an embodiment of the present invention. Fig. 13 (a) is a first step in which the suction foundation is set on the seabed surface while the vertical degree of the suction foundation is inclined, (b) is a second step of correcting the verticality of the suction foundation by buoyancy of the airbag, ) Shows a third stage in which the correction of the verticality of the suction foundation is completed, and the suction is started and the suction foundation is intruded on the sea floor.

The first step is a step in which the suction foundation 1 is set on the seabed surface 40 while the vertical degree of the suction foundation 1 is inclined. Conventionally, in the same situation as the first step, the verticality of the suction foundation can only be controlled by using additional equipment or a separate construction procedure.

The second step is to operate the pump of the airbag 20 provided on the upper part of the suction foundation 1 to move the air in the airbag 20 to the lowest level in the upper plate 5. [ According to the second step, the greatest buoyancy is generated at the lowest height of the upper plate 5, and the verticality of the suction foundation 1 is corrected. In the first and second steps, the penetration of the suction base 1 is not yet started, and the verticality can be corrected by buoyancy of the airbag 20. When the airbag 20 is controlled together with the gyro sensor or the like interlocked with the airbag 20, the verticality of the suction base 1 can be corrected with a high degree of accuracy.

In the third step, the vertical basis of the suction foundation 1 is completed, and the suction foundation is introduced into the bottom surface 40 of the suction foundation 1 while the suction is started. Since the vertical degree is precisely corrected in the second step, the effect of improving the accuracy of the construction of the suction foundation 1 is generated.

As described above, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

1: Suction Foundation
3: skirt part
5: Top plate
10: Open mouth
12: Closure plate
20: air bag
30: Hinge shaft
32: plate member
40: Sea bottom surface

Claims (15)

The upper part is covered with an upper plate, the lower part is formed in an open hollow columnar shape, and the columnar surface is composed of a skirt part penetrating into the seabed ground;
An opening which is a hole formed in at least a part of at least one of the upper plate and the skirt portion; And
A closing plate configured to close the opening, the closing plate configured to be capable of opening and closing the opening;
/ RTI >
Wherein the opening is opened by movement of the closing plate when the main body is moved in seawater.
The method according to claim 1,
Wherein the opening is formed in at least a part of the upper plate,
Wherein the closing plate is configured to slide in parallel with the upper plate,
Wherein when the main body is moved in seawater, the opening of the opening is opened by sliding of the closing plate.
The method according to claim 1,
Wherein the opening is formed in at least a part of the upper plate,
Wherein the closing plate is configured as a hinged type which is rotated around a hinge axis formed at one side of the closing plate,
Wherein when the main body is moved in seawater, the opening is opened by pivoting about the hinge axis of the closing plate.
The method according to claim 1,
Wherein the opening is formed in at least a part of the skirt portion,
Wherein the closing plate is configured to slide in parallel with the column surface of the skirt portion,
Wherein when the main body is moved in seawater, the opening of the opening is opened by sliding of the closing plate.
The method according to claim 1,
Wherein the opening is formed in at least a part of the skirt portion,
Wherein the closing plate is configured as a hinged type which is rotated around a hinge axis formed at one side of the closing plate,
Wherein the opening is opened by rotation about the hinge axis of the closing plate when the main body is moved in seawater.
The method according to claim 1,
Wherein the opening has an arc shape having a center at a center of the upper plate and an internal angle of a specific angle,
Wherein the closing plate is configured to slide with the center of the upper plate as an axis,
Wherein when the main body is moved in seawater, the opening of the opening is opened by sliding of the closing plate.
The method according to claim 1,
A sensor unit for sensing at least one of bottom surface of the main body of the main body and bottom surface drawing of the main body to generate an upper panel opening signal; And
A driving unit connected to the sensor unit and the closing plate to drive the sliding plate to open the opening plate when the sensor unit receives the top plate opening signal;
Further comprising: a suction port for receiving suction from the suction port.
The method according to claim 1,
A hollow buoyancy means provided in the upper portion of the body for receiving a low-density fluid having a density lower than that of seawater therein;
Further comprising:
Wherein the buoyancy means is configured such that the low density fluid is moved in a direction in which the top plate is tilted within the buoyancy means.
9. The method of claim 8,
Wherein the buoyancy means is constituted by a donut type and is configured to surround an outer side of the upper plate and is divided into a plurality of zones having the same length,
A pump is configured between the area and the area of the buoyancy means such that the low density fluid is moved in a direction in which the top plate is tilted within the buoyancy means.
The upper part is covered with an upper plate, the lower part is formed in an open hollow columnar shape, and the columnar surface is composed of a skirt part penetrating into the seabed ground; And
A connecting portion connecting the upper plate and the skirt portion so that the upper plate and the skirt portion can be separated and combined with each other;
Lt; / RTI >
Wherein when the main body is moved in seawater, the upper plate and the skirt portion are separated so that the upper portion of the main body is partially opened.
A method of installing a suction foundation according to claim 1,
An opening step of opening the opening which is a constitution of the suction foundation;
A descending step in which the suction foundation is lowered from the seawater to a predetermined installation position of the sea floor;
A grounding step in which the suction foundation is mounted on a seabed surface; And
A closing step in which the opening is closed;
Wherein the suction force is applied to the suction port.
A method of installing a suction foundation according to claim 2,
An opening step in which a closing plate, which is a constitution of the suction foundation, is slid to open the opening of the suction foundation, which is a constitution of the suction foundation;
A descending step in which the suction foundation is lowered from the seawater to a predetermined installation position of the sea floor;
A grounding step in which the suction foundation is mounted on a seabed surface; And
A closing step of sliding the closing plate to close the opening;
Wherein the suction force is applied to the suction port.
A method of installing a suction foundation according to claim 8,
A sucking step of sucking the suction foundation on the seabed surface with the vertical degree of the suction foundation being inclined;
A verticality correction step in which the low density fluid accommodated in the buoyancy means, which is one component of the suction foundation, is moved in a direction in which the suction foundation is inclined in the buoyancy means to correct the verticality of the suction foundation; And
A suction step in which suction pressure is applied to the inside of the suction foundation after the verticality of the suction foundation is corrected by the buoyancy means;
Wherein the suction force is applied to the suction port.
A method for lifting a suction foundation according to claim 1,
A drawing step in which seawater is injected into the inside of the suction foundation in a state where the open mouth which is a constitution of the suction foundation is closed and the suction foundation is pulled out from the seabed ground;
An opening step in which the opening is opened; And
A lifting step in which the suction foundation is lifted vertically upward in the seawater;
Wherein the suction port is connected to the suction port.
A method for lifting a suction foundation according to claim 2,
A drawing step in which seawater is injected into the inside of the suction foundation in a state where the open mouth which is a constitution of the suction foundation is closed and the suction foundation is pulled out from the seabed ground;
An opening step in which the closing plate, which is a constitution of the suction foundation, is slid to open the opening; And
A lifting step in which the suction foundation is lifted vertically upward in the seawater;
Wherein the suction port is connected to the suction port.
KR1020140161055A 2014-11-18 2014-11-18 Suction bucket foundation for decreasing resistance of seawater and adjusting verticality, installing and lifting method KR101672595B1 (en)

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CN114411795B (en) * 2022-01-04 2023-02-17 清华大学 Suction bucket foundation composite structure for clearing soil plug and reinforcing soil body in bucket
CN115492154A (en) * 2022-09-21 2022-12-20 山东大学 Self-stabilizing assembly type barrel-shaped foundation fitting and application method

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