KR102247425B1 - Suction pile capable of supplying fluid and Vertical alignment method of the Suction pile - Google Patents

Abstract

The present invention relates to a suction pile foundation having a fluid supply function and a method of adjusting the slope of the suction pile foundation, and more particularly, the upper part is covered with an upper plate and the lower part is composed of an open hollow column shape, and the column surface is a submarine ground. In the suction pile base having a main pump consisting of a skirt part penetrated into the upper plate and a main pump for draining seawater inside the main body through a drain hole on one side of the upper plate, it is installed in a vertical direction on at least one of the outer and inner surfaces of the skirt A nozzle pipe to which a fluid is supplied; And a nozzle provided on one side of the nozzle pipe so that the fluid is sprayed to the surface of the skirt portion so as to face the opposite direction of gravity; including, supplying the fluid to the surface of the skirt portion through the nozzle when the suction pile is penetrated. It relates to a suction pile foundation having a fluid supply function, characterized in that by reducing surface friction to improve penetration capability.

Description

Suction pile capable of supplying fluid and Vertical alignment method of the Suction pile}

The present invention relates to a suction pile foundation having a fluid supply function and a method for adjusting the slope of the suction pile foundation. More specifically, with respect to the suction pile used as the foundation structure of the support structure of offshore wind and offshore plants installed on the submarine ground made of sand or mud, external fluid is supplied to the surface of the suction pile to reduce surface friction to reduce penetration performance. The present invention relates to a method capable of adjusting and correcting a vertical inclination by selectively controlling external fluid supply, and a configuration of a suction pile that can be used in this method.

For offshore foundations, mono piles, suction piles, gravity type foundations and jacket foundations are used. Suction Bucket Pile refers to a pile installed by using the pressure difference between the inside and outside of the pile generated by discharging a fluid such as water or air inside the pile to the outside. It is installed on the bottom of the sea and is used for supporting or anchoring offshore fixed and floating structures such as an oil drilling platform and offshore wind power generation foundation.

A specific construction method for a single suction pile was filed in US 4,318,641 in 1982, and has since been widely used in offshore plant structures installed on soft ground. Prior to that, similar technology was used for a complex caisson of a super-sized tucked-down structure, as in the 1975 U.S. Patent No. 3,911,687.

When using a suction pile to support an offshore structure on the submarine soft ground, support structures such as monopile, tripod, and jacket are attached to the upper part of the cylindrical suction pile to compose the entire structural system.

When the pressure inside the cylindrical suction pile is reduced by using a pump, the suction pile penetrates into the soft ground where the entire structural system is installed due to the difference in water pressure.

1A is a conceptual diagram showing the penetration state of a conventional suction pile in a longitudinal section. In addition, FIG. 1B shows a photograph of an offshore wind power suction pile for deep water, FIG. 1C shows an Offshore Platform gravity type suction pile, and FIG. 1D shows a photograph of a suction pile used for mooring a floating body.

As shown in Fig. 1A, the shape of the suction pile 1 has a shape in which the upper end is sealed with an upper plate and the lower end is turned upside down to facilitate application of the suction pressure. The largest of the suction piles (1) constructed so far is 32m in diameter and 37m in length, and was constructed on the seabed at a depth of 300m and used as a foundation for an oil drilling platform. At this time, the suction pile 1 may have a discharge port and an injection port on the upper plate or side of the upper end for discharging and injecting seawater, and a ring for use as an action point when drawing may be provided at the center or side of the upper end.

In addition, as shown in Fig. 1A, the installation mechanism of the suction pile 1 is as follows. When the suction pile 1 is seated on the seabed 40, the lower part of the pile penetrates the seabed 3 to a certain depth by the weight of the pile. In this state, the seawater inside the suction pile 1 is drained to the outside by using a drainage device installed on the head of the suction pile 1. Since the flow of seawater is completely blocked in parts of the structure of the suction pile 1 except for the lower part of the pile, the drained seawater can be introduced only through the seabed 3 at the lower part of the suction pile 1.

However, since the water permeability of the submarine ground is very low, the drained seawater is prevented from being recovered and thus the pressure inside the suction pile 1 is lowered than the pressure outside the suction pile 1. As a result, a pressure difference between the inside and outside of the suction pile 1 is generated, and thus the suction pile 1 is penetrated.

There are examples of such suction piles that ① are not restricted by the water depth due to the simple installation equipment, and are installed at a maximum depth of 1600m. ② They can be installed regardless of the size of the suction pile. Occurs, and ③ the installation speed is fast enough that one can be installed in a few hours. ④ It can be pulled out with the positive pressure generated by injecting water into the suction pile, so it is easy to remove and reuse if necessary, and ⑤ During installation, penetration resistance is reduced due to the seepage of the bottom of the suction pile.

In addition, structures using such a suction pile can be implemented regardless of the depth of water, ② can be installed in a short time, and have excellent constructability, such as the ability to install a large-scale foundation in the submarine ground, and ③ the inside of the suction pile is sealed after installation. As it becomes a state, suction pressure is generated inside the suction pile by drawing, and this suction pressure acts as a resistance force (or ground power), which increases the stability by rooting. ④ It is necessary to improve the ground. There are cases where there is no (especially advantageous for the structure of the soil layer, which is soft ground on the surface and sandy soil on the lower layer), and ⑤ After installation, it has the advantage of being able to perform preloading and loading tests using suction pressure.

Due to these advantages, the suction pile is mainly used as a foundation for a fixed large platform in the oil & gas field, an anchor for floating body mooring, and a deep-sea subsea equipment, as shown in Figs. 1b, 1c, and 1d. Active technology development is being carried out for application to renewable fields such as wind power generation.

In addition, the tripod and jacket support structures supported by three or more multi-suction foundations can easily adjust the slope of the entire structural system by controlling the mutual pressure between the pumps installed on the individual suction foundations.

According to the Norwegian classification standard DNV-GL, in the case of a monopile foundation, 0.04° is required for the verticality tolerance of the foundation.

In order to correct the slope of the structural system installed in a single suction pile, it is necessary to adjust the slope of the suction pile when intruding.In 2010, the inside of the suction pile was divided into seven in Jiangsu Province, China, and pumps were installed in each space. By connecting, different pressures were applied to each interior space, and the slope was adjusted by this pressure difference (Ocean Engineering 114 (2016) 87-100).

As an idea similar to the above, according to Korean Patent Application Publication No. 10-2013-0094410, a method of connecting the pumps by dividing the inside of the suction pile into a radial shape can also be found, but it is the same technique in a large framework as the Chinese idea. In addition, the international patent (WO2013117197A3) describes a technique that uses multiple spaces. In these techniques, there is an inefficiency in that the pump must be separately operated as many as the number of internal space divisions.

In 2009, O. Cotter's doctoral dissertation, “The installation of suction caisson foundations for offshore renewable energy structures”, introduced jetting at the tip of the suction pile to improve penetration by disturbing the ground at the tip. The method was introduced.

If the jetting pressure is changed according to the length of the cylindrical tip, the inclination can also be adjusted. This technique also requires two sets of pumps: the main pump to reduce the pressure inside the cylindrical suction pile and the pump used in the jetting system, and the purpose of jetting is ground disturbance at the tip.

Republic of Korea Patent Publication 10-2013-0094410 International Publication Patent WO2013117197 A3 Japanese Patent Application Laid-Open No. 2005-256603 Japanese Patent Laid-Open Patent Publication No. 2000-257077 Republic of Korea Patent Registration No. 0719300 Korean Registered Patent No. 1117396

Accordingly, the present invention was devised to solve the conventional problems as described above, and the penetration resistance of the suction pile is composed of the sum of the tip bearing capacity and the surface friction of the suction pile, and as the penetration depth increases, the surface friction is equivalent to the penetration resistance. Occupy a part. According to an embodiment of the present invention, by injecting a small amount of external fluid, it is possible to greatly improve the penetration ability by reducing the surface friction of the suction pile, and when selectively applied in the circumferential length direction, tilt adjustment is possible, having a fluid supply function. Its purpose is to provide a suction pile foundation and a method of adjusting the slope of the suction pile foundation.

According to an embodiment of the present invention, when an external fluid is injected to the surface of a suction pile, once the fluid flow is formed, the fluid flow can be naturally controlled only by opening and closing the control valve without using a sub-pump for a nozzle. Its purpose is to provide a suction pile foundation having a supply function and a method of adjusting the slope of the suction pile foundation.

And, according to an embodiment of the present invention, a fluid supply function capable of improving penetration capability by utilizing additional equipment such as a vibration hammer other than a pump that can be used even when initial penetration is difficult due to low water depth or high penetration resistance of the ground. Its purpose is to provide a suction pile foundation having a and a method of adjusting the slope of the suction pile foundation.

In addition, according to an embodiment of the present invention, a suction pile foundation having a fluid supply function and a fluid supply function capable of securing a tilt adjustment ability while improving penetration performance by selectively reducing the friction force on the surface of the suction pile when penetrating the suction pile, and Its purpose is to provide a method of adjusting the slope of the suction pile foundation.

And according to an embodiment of the present invention, so that the suction pile can be installed even on the ground having a very high penetration resistance, a suction pile foundation having a fluid supply function that can use an additional device such as a vibration hammer that can be selectively adopted in addition to a pump, and Its purpose is to provide a method of adjusting the slope of the suction pile foundation.

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 that are not mentioned are clearly to those of ordinary skill in the technical field to which the present invention belongs from the following description. It will be understandable.

It is an object of the present invention to drain the seawater inside the body through the upper part covered with an upper plate and the lower part in an open hollow column shape, and the main body composed of a skirt part penetrated into the seabed, and through a drain hole on one side of the upper plate. In the suction pile base having a main pump, the nozzle pipe is installed in a vertical direction on at least one of the outer surface and the inner surface of the skirt portion to supply a fluid; And a nozzle provided on one side of the nozzle pipe so that the fluid is sprayed to the surface of the skirt part so as to face the opposite direction of gravity. Including, fluid to the surface of the skirt part through the nozzle at the time of penetration or removal of the suction pile base. It can be achieved as a suction pile foundation having a fluid supply function, characterized in that it is possible to improve penetration capability by reducing surface friction by supplying or to facilitate removal of the suction pile foundation.

And the nozzle pipe is a plurality of installed spaced apart from each other at a specific interval along the circumferential direction of the main body, and a nozzle opening and closing valve for opening and closing the fluid supply to the nozzle pipe, wherein the nozzle is spaced at a specific interval in the vertical direction and a plurality of It may be composed of, and it may be characterized in that the injection direction of the fluid by the nozzle is directed in a direction opposite to gravity, and is injected in a direction inclined toward the surface of the skirt part.

In addition, a horizontality measuring unit for measuring the horizontality of the suction pile foundation; And a control unit for selectively opening and closing the nozzle opening/closing valve to adjust and correct the slope of the suction pile based on the measured value measured by the horizontality measuring unit.

And a discharge pipe connected to the drain hole, a main pump provided on one side of the discharge pipe, a filter part installed on one side of the discharge pipe before the main pump, a control valve provided at a rear end of the main pump, and the control valve. And a nozzle supply pipe connecting between the nozzle opening and closing valve, and the control unit controls opening and closing of the control valve and the nozzle opening/closing valve, so that the seawater sucked through the main pump is supplied to the nozzle supply pipe. It may be characterized in that it is supplied to the nozzle pipe through.

In addition, the nozzle may be characterized in that it comprises an injection control unit for adjusting the flow rate of the fluid injected through the nozzle, and an angle adjusting unit for adjusting the injection angle of the fluid.

The penetration resistance of the suction pile is composed of the sum of the tip bearing capacity and the surface friction of the suction pile, and as the penetration depth increases, the surface friction takes up a significant part of the penetration resistance. According to the suction pile foundation having a fluid supply function and the tilt adjustment method of the suction pile foundation according to an embodiment of the present invention, by injecting a small amount of external fluid, the surface friction of the suction pile can be reduced, thereby greatly improving the penetration capability. , When selectively applied in the circumferential length direction, tilt adjustment is also possible.

According to a suction pile foundation having a fluid supply function according to an embodiment of the present invention and a method for adjusting the slope of the suction pile foundation, when an external fluid is injected to the surface of the suction pile, once the flow of the fluid is formed, the subpump for the nozzle is It has the effect of naturally controlling the flow of fluid by simply opening and closing the control valve without using it.

In addition, according to the suction pile foundation having a fluid supply function according to an embodiment of the present invention and the method of adjusting the slope of the suction pile foundation, a pump that can be used even when the depth of water is low and initial penetration is difficult or the penetration resistance of the ground is high. It has the effect of improving the penetration ability by utilizing additional equipment such as a vibration hammer.

In addition, according to the suction pile foundation having a fluid supply function and the tilt adjustment method of the suction pile foundation according to an embodiment of the present invention, when the suction pile is penetrated, the frictional force on the surface of the suction pile is selectively reduced to improve penetration performance. At the same time, it has the effect of securing the ability to adjust the tilt.

And according to the suction pile foundation having a fluid supply function according to an embodiment of the present invention and the tilt adjustment method of the suction pile foundation, the suction pile can be installed in the ground with very high penetration resistance, and can be selectively adopted in addition to the pump. It has the effect of using an additional device such as a vibration hammer.

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 from the following description. I will be able to.

The following drawings attached to the present specification illustrate a preferred embodiment of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the present invention, so that the present invention is limited to the matters described in such drawings. It is limited and should not be interpreted.
1A is a conceptual diagram showing a conventional suction-based penetration state in longitudinal section;
1b is a photograph of the basic offshore wind power suction for deep water,
1c is a photograph of an Offshore Platform gravity-type suction foundation,
1D is a photograph of a suction base used for mooring a floating body,
2 is a partial cross-sectional view of a suction pile foundation having a fluid supply function according to an embodiment of the present invention;
3 is a plan view of a suction pile foundation having a fluid supply function according to an embodiment of the present invention;
4 is a partial front view showing a nozzle pipe and a nozzle provided on the outer and inner surfaces of the skirt portion according to an embodiment of the present invention;
5 is a configuration diagram for explaining a fluid injection method using a main pump and a control valve according to an embodiment of the present invention;
6 is a block diagram showing a signal flow of a controller according to an embodiment of the present invention.

The above objects, other objects, features, and advantages of the present invention will be easily understood through the following preferred embodiments related to 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 content may be thorough and complete, and the spirit of the present invention may be sufficiently conveyed to those skilled in the art.

In the present specification, when a component is referred to as being on another component, it means that it may be formed directly on the other component or that 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 views and/or plan views, which are ideal exemplary views of the present invention. In the drawings, thicknesses of films and regions are exaggerated for effective description of technical content. Therefore, the shape of the exemplary diagram may be modified by manufacturing technology and/or tolerance. Accordingly, embodiments of the present invention are not limited to the specific form shown, but also include a change in form generated according to the manufacturing process. For example, the area shown at a right angle may be rounded or may have a shape having a predetermined curvature. Accordingly, regions illustrated in the drawings have properties, and the shapes of regions illustrated in the drawings are for exemplifying a specific shape of the region of the device and are not intended to limit the scope of the invention. In various embodiments of the present specification, terms such as first and second are used to describe various elements, but these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. The embodiments described and illustrated herein also include complementary embodiments thereof.

The terms used in the present specification are for describing exemplary embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used in the specification, "comprises" and/or "comprising" does not exclude the presence or addition of one or more other components.

In describing the specific embodiments below, a number of specific contents have been prepared to explain the invention in more detail and to aid understanding. However, a reader who has knowledge in this field enough to understand the present invention can recognize that it can be used without these various specific contents. In some cases, it is mentioned in advance that parts that are commonly known in describing the invention and are not largely related to the invention are not described in order to prevent confusion without any reason in describing the invention.

Hereinafter, the configuration and function of the suction pile foundation 10 according to an embodiment of the present invention will be described. 2 is a partial cross-sectional view of a suction pile foundation 10 having a fluid supply function and a vibration applying unit according to an embodiment of the present invention. And Figure 3 shows a plan view of the suction pile foundation 10 having a fluid supply function and a vibration applying unit according to an embodiment of the present invention.

According to an embodiment of the present invention, when the suction pile base 10 is penetrated or removed, an external fluid is supplied to the surface of the suction pile base 10 to reduce surface friction, thereby improving penetration performance, and By selectively controlling the supply of external fluid through the plurality of nozzle pipes 20, the slope of the suction pile foundation 10 can be adjusted.

In addition, according to an embodiment of the present invention, at the time of penetration or removal of the suction pile base 10, the vibration application unit is driven to apply vibration to the suction pile, thereby improving penetration performance. The inclination of the suction pile foundation 10 can be adjusted by selectively controlling the drive unit.

Suction pile foundation 10 according to an embodiment of the present invention, as shown in Figs. 2 and 3, the upper part is covered with the upper plate 11, the lower part is composed of an open hollow column shape, the column surface is a submarine ground It can be seen that it may be configured to include a main pump 7 configured to drain the seawater inside the main body through a main body composed of a skirt part 12 penetrated into the upper plate 11 and a drain hole 4 on one side of the upper plate 11.

In addition, according to an embodiment of the present invention, the legs 5 connected to the upper central end of the upper plate 11 on the basis of the suction pile, and a plurality of braces 6 connected between the legs 5 and the upper plate 11 , It consists of a stiffener 13 (stiffner) radially installed on the lower surface of the upper plate 11, and a lug 14 extending outward of the suction pile foundation 10 to the outside of each of the stiffeners 13 .

And the suction pile foundation 10 according to the embodiment of the present invention, as shown in Figure 2, the outer surface of the skirt portion 12, the nozzle pipe 20 is installed in a vertical direction to the inner surface to supply the fluid. You can see that it will be. In addition, the nozzle 30 provided on one side of the nozzle pipe 20 is configured to be sprayed onto the surface of the skirt portion 12 so that the fluid faces the opposite direction of gravity.

Therefore, when the suction pile base 10 is penetrated, the lower end of the skirt part 12 of the suction pile base is penetrated using gravity, and then the suction pressure is applied by driving the main pump 7 to proceed with the penetration. , By supplying fluid to the surface of the skirt part 12 through the nozzle 30 attached to the surface of 1 ~ 2m from the bottom of the suction pile base, the surface friction is reduced to improve penetration capability. The fluid injection direction sprayed through the nozzle 30 corresponds to the direction opposite to the gravity, and is configured to face the surface of the suction pile.

With the application of such a small amount of fluid, the surface friction force at the location decreases, so that the penetration capability shape and inclination can be adjusted. If necessary, the nozzles 30 may be disposed in a plurality by spaced apart at specific intervals in the vertical direction. That is, the position of the nozzle 30 is arranged at regular intervals in the upper direction as well as the lower end of the suction pile base 10, so that the amount of reduction in surface friction can be adjusted.

In addition, since the amount of fluid is small, the pressure imbalance around the surface of the foundation of the suction pile is dissipated after installation, so the frictional force is restored after installation.

In addition, the nozzle pipe 20 according to the embodiment of the present invention is provided with a plurality of nozzle pipes 20 spaced apart from each other along the circumferential direction of the main body, and includes a nozzle opening/closing valve 23 for opening and closing the fluid supply to the nozzle pipe 20 It is composed of.

4 is a partial front view showing the nozzle pipe 20 and the nozzle 30 provided on the outer and inner surfaces of the skirt part 12 according to an embodiment of the present invention. As shown in Figure 4, the outer nozzle pipe 21 installed in the vertical direction on the outer surface of the skirt portion 12, and the outer nozzle pipe 21 is provided on one side of the skirt portion 12 toward the outer surface. It can be seen that it is configured to include an external nozzle 31 for injecting a fluid. The injection direction of the fluid by the external nozzle 31 is configured to be injected in a direction opposite to gravity, but in a direction inclined toward the outer surface of the skirt portion 12. In addition, the external nozzle 31 includes an external nozzle injection control unit 32 that adjusts the fluid flow rate injected through the external nozzle 31, and an external nozzle angle adjustment unit 33 that adjusts the injection angle of the fluid. Can be configured.

In addition, as shown in Figure 4, the inner nozzle pipe 22 installed in the vertical direction on the inner surface of the skirt portion 12, and the inner surface of the skirt portion 12 provided on one side of the inner nozzle pipe 22 It can be seen that it is configured to include an inner nozzle 34 for injecting a fluid toward. The injection direction of the fluid by the inner nozzle 34 is configured to be directed in a direction opposite to gravity, but in a direction inclined toward the inner surface of the skirt portion 12. In addition, according to an embodiment of the present invention, the inner nozzle injection control unit 35 for adjusting the fluid flow rate injected through the inner nozzle 34, and the inner nozzle angle adjusting unit 36 for adjusting the injection angle of the fluid. It can be configured to include.

In addition, according to an embodiment of the present invention, by selectively opening and closing the horizontality measuring unit 60 for measuring the horizontality of the suction pile base 10 and the nozzle opening and closing valve 23, the horizontality measuring unit 60 ) May be configured to include a control unit 70 for adjusting and correcting the slope of the suction pile foundation 10 based on the measured value. That is, when adjusting the inclination, the nozzle opening/closing valve 23 for each nozzle 30 is selectively operated to selectively adjust the surface friction force to adjust the inclination.

In addition, according to an embodiment of the present invention, once penetration is performed in a manner that reduces surface friction, in the case of the nozzle pipe 20 installed inside, a nozzle sub-pump 8 for supplying fluid to the nozzle pipe 20 is used. Without doing so, automatic fluid flow can be expected when the main pump 7 is operated according to the preformed fluid flow.

That is, instead of separately using the sub-pump 8 for supplying the nozzle pipe 20, a method of supplying a small amount of the fluid (seawater) discharged from the main pump 7 back to the nozzle pipe 20 is also possible. . 5 is a block diagram illustrating a fluid injection method using the main pump 7 and the control valve 52 according to an embodiment of the present invention.

According to an embodiment of the present invention, as shown in FIG. 5, a discharge pipe 50 connected to the drain hole 4, a main pump 7 provided on one side of the discharge pipe 50, and a front end discharge of the main pump A nozzle supply connecting the filter unit 51 installed on one side of the pipe 50, the control valve 52 provided at the rear end of the main pump 7, and the control valve 52 and the nozzle opening/closing valve 23 It can be seen that it can be configured to include a pipe (53). The control valve 52 is configured as a three-way valve, and a part of the fluid discharged through the discharge pipe 50 may be supplied to the nozzle supply pipe 53.

Accordingly, the control unit 70 controls the opening and closing of the control valve 52 and the nozzle opening/closing valve 23, so that the fluid (seawater) sucked through the main pump 7 is supplied through the nozzle supply pipe 53. It can be supplied to (20).

In addition, even when the suction pile base 10 is removed from the sea floor, a fluid is applied to the surface through the nozzle 30 installed on the surface of the cylindrical suction pile base 10 to reduce the surface friction, thereby reducing the surface friction. The removal operation can be facilitated.

As mentioned above, according to an embodiment of the present invention, the legs 5 connected to the upper central end of the suction pile base top plate 11, and a plurality of braces connecting the legs 5 and the top plate 11 (6), a stiffener 13 radially installed on the lower surface of the upper plate 11, and a lug 14 extending outward of the suction pile foundation 10 to the outside of each of the stiffeners 13 do.

That is, the legs 5 of the supporting structure are installed on the upper part of the suction pile foundation 10, and since the diameter of the legs 5 and the diameter of the suction pile foundation 10 are greatly different, this connection is a kind of TP (Transition Piece). Should be recognized as.

When designing the offshore wind power support structure, the design of the TP is very important, and a radial brace is installed around the leg (5) to alleviate the concentration of sectional force. In the suction pile foundation (10), a radial brace is installed on the upper part of the legs (5) and the suction pile foundation (10), and the inside of the suction pile foundation top plate (11) to which the brace is attached is reinforced with a stiffner (13). It is common.

In the embodiment of the present invention, the stiffener 13 installed inside is extended to the outside of the cylindrical suction pile base 10 structure to form a radial outer lug 14. This can further improve your ability to support the brace.

It is possible to add additional penetration capability to the suction main pump 7 by installing a vibration applying unit composed of a vibration hammer 40 on each of the upper portions of the radial lugs 14 in a radial direction. And it is possible to adjust the inclination by selectively driving the plurality of vibration hammers 40 installed in such a radial manner. That is, the control unit 70 may selectively drive a plurality of vibration hammers 40 to adjust and correct the slope of the suction pile foundation 10 based on the measured values measured by the horizontality measuring unit 60. .

In addition, even when the suction pile base 10 is removed from the sea floor, the vibration hammer 40 installed on each of the lugs 14 of the cylindrical suction pile base 10 is operated to facilitate the removal of the suction pile base 10. can do.

6 is a block diagram showing a signal flow of the controller 70 according to an embodiment of the present invention. As shown in Figure 6, the control unit 70 can control the main pump 7 to adjust the suction pressure, based on the value measured by the horizontality measuring unit 60, a plurality of nozzle opening/closing valves 23 ) Can be selectively opened and closed to adjust the inclination of the suction pile base 10, and the control valve 52 and the opening/closing valve 23 for nozzles are controlled to open and close the suction fluid through the main pump 7 to the nozzle. It can be supplied through the pipe 20 and supplied through the nozzle 30.

In addition, by controlling the external nozzle injection control unit 32, the amount of fluid injected to the outer surface of the skirt unit 12 can be controlled, and the amount of fluid injected to the outer surface of the skirt unit 12 through the external nozzle angle control unit 33 can be controlled. The spray angle of the fluid can be adjusted. As mentioned above, it is preferable that the spraying direction is anti-gravity, but is sprayed in a direction inclined toward the outer surface.

And the control unit 70 can control the amount of fluid injected to the inner surface of the skirt unit 12 by controlling the inner nozzle injection control unit 35, and the inside of the skirt unit 12 through the inner nozzle angle adjusting unit 36 The spray angle of the fluid sprayed to the surface can be adjusted. As mentioned above, it is preferable that the spraying direction is anti-gravity, but is sprayed in a direction inclined toward the outer surface.

In addition, the control unit 70 may selectively drive the plurality of vibration hammers 40 to adjust and correct the slope of the suction pile foundation 10 based on the measured values measured by the horizontality measuring unit 60. .

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

1: Conventional suction pile
2: submarine ground
3: the bottom of the sea
4: drainage work
5: Leg
6: Brace
7: main pump
8: Sub-pump for nozzle
10: Suction pile basics
11: top
12: skirt part
13: Stiffener
14: rug
20: Nozzle pipe
21: external nozzle pipe
22: internal nozzle pipe
23: Nozzle opening/closing valve
30: Nozzle
31: external nozzle
32: external nozzle injection control unit
33: external nozzle angle adjustment unit
34: internal nozzle
35: internal nozzle injection control unit
36: internal nozzle angle adjustment part
40: vibration hammer
50: discharge pipe
51: filter part
52: control valve
53: nozzle supply pipe
60: horizontality measurement unit
70: control unit

Claims (5)

The upper part is covered with an upper plate and the lower part is composed of an open hollow column shape, and the column surface has a main pump consisting of a skirt part that penetrates the seabed, and a main pump that drains seawater inside the main body through a drain hole on one side of the upper plate. On the basis,
A nozzle pipe installed in a vertical direction on at least one of an outer surface and an inner surface of the skirt portion to supply a fluid; And
Including; a nozzle provided on one side of the nozzle pipe so that the fluid is sprayed to the surface of the skirt portion so as to face the opposite direction of gravity
A leg connected to the upper central end of the upper plate based on the suction pile, a plurality of braces connecting between the leg and the upper plate, a stiffener radially installed on the lower surface of the upper plate, and the suction to the outside of each of the stiffeners Including; a lug extending to the outside of the pile foundation, and a vibration applying unit installed on each of the lugs to apply vibration to the suction pile foundation;
When the suction pile base is penetrated or removed, a fluid is supplied to the surface of the skirt part through the nozzle to reduce surface friction to improve penetration capability or to facilitate removal of the suction pile base, and additionally, the vibration applying part A suction pile foundation having a fluid supply function, characterized in that it can be operated to improve penetration capability or to facilitate removal of the suction pile foundation.
The method of claim 1,
The nozzle pipe is provided in a plurality of spaced apart from each other along a circumferential direction of the main body at a specific interval, and includes a nozzle opening and closing valve for opening and closing the fluid supply to the nozzle pipe,
The nozzles may be configured in a plurality by being spaced at specific intervals in the vertical direction,
A suction pile foundation having a fluid supply function, characterized in that the injection direction of the fluid by the nozzle is directed in a direction opposite to gravity, and is injected in a direction inclined toward the surface of the skirt part.
The method of claim 2,
A horizontality measuring unit for measuring the horizontality of the suction pile foundation; And
And a control unit for selectively opening and closing the nozzle opening/closing valve to adjust and correct the slope of the suction pile based on the measured value measured by the horizontality measuring unit; Foundation.
The method of claim 3,
A discharge pipe connected to the drain hole, a main pump provided on one side of the discharge pipe, a filter part installed on one side of the discharge pipe before the main pump, a control valve provided at a rear end of the main pump, and the control valve It includes a nozzle supply pipe connecting between the nozzle opening and closing valve,
The control unit has a fluid supply function, characterized in that by controlling the opening and closing of the control valve and the nozzle opening/closing valve, and supplying seawater sucked through the main pump to the nozzle pipe through the nozzle supply pipe. Suction pile basics.
The method of claim 2,
The nozzle is a suction pile foundation having a fluid supply function, characterized in that it comprises an injection control unit for adjusting the flow rate of the fluid injected through the nozzle, and an angle adjusting unit for adjusting the injection angle of the fluid.

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