KR102293722B1 - Multiple bulkhead hollow underwater foundation - Google Patents

Abstract

The present invention is an underwater foundation structure that provides a foundation for offshore facilities installed in the sea, the structure body being fixed in water to provide a space in which the offshore facility is supported; a base unit fixed to the bottom of the water while forming a lower portion of the structure body; and a support unit installed in the upper central portion of the base unit and providing a supporting force to which the offshore facilities are connected and supported, wherein the base unit controls the buoyancy of the structure body through the inflow and outflow of ballast water therein characterized in that

Description

Multiple bulkhead hollow underwater foundation structure {MULTIPLE BULKHEAD HOLLOW UNDERWATER FOUNDATION}

The present invention relates to an underwater foundation structure, and more particularly, to a multiple bulkhead type hollow underwater foundation structure that is easy to secure quality and convenient to manufacture and transport.

Offshore wind power is a future renewable energy that converts wind energy into electrical energy by installing a support structure in the windy sea and attaching turbines and blades to it. Unlike tidal power generation, which generates electricity using the difference between the tides, a turbine installed in the water using the tide It is a rotational development method.

In such offshore wind power generation, a gravity-type foundation or jacket structure is installed in the water for a support structure first, and a turbine and a blade are constructed. In addition, tidal power generation is less expensive than tidal power generation because there is no need to construct a breakwater, does not restrict the passage of ships, does not impede the movement of fish, and does not affect the surrounding ecosystem, so it is evaluated as environmentally friendly. have.

As such, in tidal power generation, a tidal power turbine is used to obtain energy from a tidal current, and such a tidal power turbine is a nacelle part corresponding to a body and a propeller type rotatably installed therein. It is common to include aberrations.

On the other hand, the turbine for tidal power generation configured in this way is inevitably very difficult to install due to the characteristic that a large turbine of MW class or higher must be installed at a position where the tidal current is fast in order to efficiently use the tidal current.

For this reason, a method of installing a turbine for tidal power generation on a support structure installed after a support structure is fixedly installed on the seabed is generally used.

On the other hand, the support structure installed on the seabed by this method is inevitably very heavy to ensure stability during installation and operation, and accordingly, there are various difficulties in installing the heavy support structure on the seabed. there has been

In addition, in the case of offshore development and installation of port structures in the sea, it is a general method to manufacture large structures of thousands of tons or more on land, transport them to the installation site, and construct them. In this method, the construction cost is often increased because a considerable cost is required for long-distance transportation in addition to a large manufacturing cost. In particular, when constructing a caisson or a large-diameter pile foundation, which is a gravity-type large structure, special equipment or a carrier is required, and in the case of a soft seabed, long-term subsidence or unequal subsidence occurs.

Republic of Korea Patent Registration No. 10-1998464

Therefore, the present invention has been devised to solve the above problems, and the problem to be solved by the present invention is to manufacture a large-scale offshore structure on land and to facilitate transportation of a multi-bulk wall type hollow underwater foundation structure equipped with the function. is to provide

Another object of the present invention is, specifically, inducing an appropriate type of submersion when dragged by a tug during sea transportation, and by directly pouring concrete on a large-scale underwater foundation at the site, reducing the interface gap between the uneven seabed ground and the foundation to reduce inequality It is to provide a multi-bulk wall type hollow underwater foundation structure with a function to prevent subsidence.

In addition, when constructing an underwater foundation structure in the sea or underwater, it responds to tidal resistance by injecting water corresponding to the appropriate buoyancy force, and if the rocky ground is not flat, the construction can be performed without leveling the floor. This is to provide a multi-bulk wall type hollow underwater foundation structure that can prevent uneven settlement and secure long-term safety.

However, 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

The present invention was created to improve the problems of the prior art as described above, as an underwater foundation structure that provides a support foundation for large offshore facilities installed in the sea, fixed in water to provide a space in which the offshore facilities are supported structure body; a base unit fixed to the bottom of the water while forming a lower portion of the structure body; and a support unit installed in the upper center of the base unit and providing a supporting force to which the offshore facilities are connected and supported, wherein the base unit enables the submersion of the structure body through the inflow and outflow of ballast water therein buoyancy can be controlled.

In addition, the base unit may include: a housing in which cast-in-place concrete is embedded in the lower portion and provides a space in which ballast water is injected; a plurality of compartments formed on the upper portion of the housing to provide a space for injecting ballast water and separated by a plurality of partition walls; Concrete embedding room located in the lower part of the compartment to provide a space in which concrete is poured and cured in the field; and a highly elastic flexible membrane that is installed while finishing the lower part of the concrete embedding chamber to prevent loss of concrete and at the same time adhere to the bottom of the submerged ground.

In addition, the support unit, a support member installed in the center of the upper portion of the base unit to provide a space in which the offshore facility is fixed; a first flow passage penetrating the upper and lower portions of the support member and connected to the base unit to provide a flow passage through which concrete is injected in the field; and a second flow passage that passes through the upper and lower portions of the support member and is connected to the base unit to provide a flow passage through which ballast water is injected.

In addition, the material of the high-elasticity flexible membrane is made of any one of high-elasticity geotextile, plastic, and rubber membrane, so that the structure body can be fixed while responding to the uneven topography of the underwater floor.

In addition, a plurality of height adjustment units installed on the side of the base unit to elevate the base unit; may further include.

In addition, the partition wall of the compartment is formed with a connection hole that can communicate with each other, it is possible to move the ballast water.

In addition, the connection hole can be opened and closed to control the movement of the ballast water.

In addition, it is possible to control the verticality of the structure body by injecting air into the compartment through the second flow path.

In addition, after the posture of the structure body is fixed, concrete may be poured into the second flow path to fill each of the compartments.

According to an embodiment of the present invention, by injecting appropriate water into the multiple bulkheads by reflecting the floating concept in which the structure floats during transport, it maintains a neutral buoyancy state, and at the same time has a circular caisson shape to minimize drag, while the tugboat It is possible to tow directly with the slab, and the optimal structure can be constructed by lowering the load of the structure by injecting water into multiple bulkheads during underwater construction, adjusting the construction position, and adjusting the cross section of the bulkhead.

In addition, according to an embodiment of the present invention, it is possible to closely fix the base of the foundation and the body of the structure by pouring on-site concrete that conforms to the uneven surface of the seabed.

In addition, when the rocky ground is not flat, it is expensive to level the floor.

In addition, it is easy to secure quality due to onshore production, and it is possible to maintain safety due to the weight of the structure, and since the interior is empty, it can be installed as a small marine equipment.

In addition, it is possible to control the verticality by using the retractor at the bottom of the housing, and it is possible to prevent the loss of underwater concrete by using the flexible rubber membrane, plastic and membrane of the base unit.

In addition, it has the characteristics of improving construction performance and reducing maintenance costs for installation and maintenance by manufacturing a dedicated barge to tow an underwater foundation structure.

However, 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 this 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 to be described later, so the present invention is described in such drawings It should not be construed as being limited only to
1 is a conceptual diagram of a multiple bulkhead type hollow underwater foundation structure according to an embodiment of the present invention.
Figure 2 is a perspective view of a multi-bulk wall type hollow underwater foundation structure according to an embodiment of the present invention.
Figure 3 is a bottom side perspective view of a multiple bulkhead type hollow underwater foundation structure according to an embodiment of the present invention.
4 is a cross-sectional view of a multi-bulk wall type hollow underwater foundation structure according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art to which the present invention pertains can easily implement them. However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiment described in the text. That is, since the embodiment may have various changes and may have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, it should not be understood that the scope of the present invention is limited thereby.

The meaning of the terms described in the present invention should be understood as follows.

Terms such as “first” and “second” are for distinguishing one component from another, and the scope of rights should not be limited by these terms. For example, a first component may be termed a second component, and similarly, a second component may also be termed a first component. When a component is referred to as being “connected” to another component, it may be directly connected to the other component, but it should be understood that other components may exist in between. On the other hand, when it is mentioned that a certain element is "directly connected" to another element, it should be understood that the other element does not exist in the middle. Meanwhile, other expressions describing the relationship between elements, that is, “between” and “between” or “neighboring to” and “directly adjacent to”, etc., should be interpreted similarly.

The singular expression is to be understood to include the plural expression unless the context clearly dictates otherwise, and terms such as "comprises" or "have" refer to the specified feature, number, step, action, component, part or these It is intended to indicate that a combination exists, and it should be understood that it does not preclude the possibility of the existence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Terms defined in general used in the dictionary should be interpreted as having the meaning consistent with the context of the related art, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

1 is a conceptual diagram of a multiple bulkhead type hollow underwater foundation structure according to an embodiment of the present invention, FIG. 2 is a perspective view of a multiple bulkhead type hollow underwater foundation structure according to an embodiment of the present invention, FIG. 3 is this A bottom side perspective view of a multiple bulkhead type hollow underwater foundation structure according to an embodiment of the present invention, Figure 4 is a cross-sectional view of the multiple bulkhead type hollow underwater foundation structure according to an embodiment of the present invention.

1 to 4, as an underwater foundation structure that provides a foundation for offshore facilities installed in the sea, the present invention includes a structure body 100, a base unit 200 and a support unit 300. can

The structure body 100 may be fixed in water to provide a space in which the offshore facility 20 is supported. The base unit 200 may be fixed to the bottom of the water while forming the lower portion of the structure body (100). The base unit 200 can control the buoyancy by allowing the body of the structure to be submerged through the inflow and outflow of ballast water therein.

The base unit 200 may include a housing 210 , a compartment 220 , a concrete buried chamber 230 , and a membrane 240 .

The housing 210 may provide a space in which cast-in-place concrete is embedded and ballast water is injected. Specifically, the housing 210 forming the lower part of the structure body 100 is manufactured in a cylindrical shape of upper and lower light to give stability when fixed to the underwater floor, and the support unit 300 is placed in the center part. It may be manufactured in a structure, but it is not limited to the above shape, and it can be manufactured and used in various shapes depending on the situation, such as a polyhedral shape.

The compartment 220 is composed of a plurality and is formed on the upper portion of the housing 210 to provide a space into which ballast water is injected, and is a component separated by a plurality of partition walls. The partition wall of the compartment 220 is formed with a connection hole 30 capable of communicating with each other, so that ballast water can move. The connection hole 30 can be opened and closed to control the movement of ballast water. That is, the connection hole 30 is provided with a blocking film capable of controlling the opening and closing from the outside, so that the connection hole 30 can be manufactured to be able to control the opening and closing from the outside.

The concrete embedding chamber 230 may be located in the lower portion of the compartment 220 to provide a space in which concrete is poured and cured in the field. Specifically, the concrete embedding chamber 230 is manufactured in a structure in which the lower part is open or blocked, and when the structure body reaches a set position in the water and is placed on the floor in the water, concrete is poured and fixed, at this time the lower part is in an open state In this case, it can be cured while being poured directly on the bottom of the water and fixed more firmly.

The high elastic flexible membrane 240, the flexible rubber membrane, etc. are installed while finishing the lower part of the concrete embedding chamber 230 to prevent the loss of concrete and at the same time be able to adhere to the bottom of the ground in the water. Specifically, a membrane is a kind of lining material installed to have liquid-tightness inside the tank side and bottom plate of the RC or PC structure among tanks for storing cryogenic liquids such as LNG and LPG. It refers to a film such as a waterproofing layer or paint.

The material of the high elastic flexible membrane 240 is made of any one of high elastic geotextile, plastic, and rubber membrane, so that the structure body 100 can be fixed while responding to the uneven topography of the underwater floor. Therefore, the high elastic flexible membrane 240 has high elasticity and tensile force, so it is possible to closely fix the uneven bottom surface of the base and the structure body 100 .

The support unit 300 is installed in the upper center of the base unit 200 and may provide a supporting force to which the offshore facility 20 is connected and supported. The support unit 300 may include a support member 310 , a first flow path 320 , and a second flow path 330 .

The support member 310 may be installed in the center of the upper portion of the base unit 200 to provide a space in which the offshore facility 20 is fixed. Specifically, the support member 310 is installed in a shape protruding toward the upper portion with a set length from the center of the upper portion of the housing 210, and may provide a space in which the marine facility 20 is fixed at the upper portion. In addition, the support member 310 may be manufactured integrally with the housing 210 or manufactured separately from the housing 210 and then coupled thereto.

The first flow path 320 may pass through the upper and lower sides of the support member 310 and may be connected to the base unit 200 to provide a flow path through which concrete is injected. The second flow path 330 may pass through the upper and lower sides of the support member 310 and may be connected to the base unit 200 to provide a flow path through which ballast water is injected.

Specifically, the first flow path 320 and the second flow path 330 may be formed with a set length while penetrating up and down in a portion of the support member 310, and in this case, the first flow path 320 is a concrete embedded chamber ( 230) and the outside can be connected to enable the injection of concrete. The half side, the second flow path 330 may connect each of the compartments 220 with the outside to enable injection of various substances, such as ballast water, air, or concrete injection.

In addition, the support unit 300 is configured to further include a cover that can be opened and closed on the upper portion of the support member 310 so that foreign substances such as seawater are transferred to the first flow path 320 and the second flow path when the underwater foundation structure 10 moves in the sea. Inflow into the compartment 220 and the concrete embedded chamber 230 through the second flow path 330 may be blocked in advance.

The verticality of the structure body 100 may be controlled by injecting air into the compartment 220 through the second flow path 330 .

After the posture of the structure body 100 is fixed, concrete may be poured into the second flow path 330 to fill each compartment 220 .

The multiple bulkhead type hollow underwater foundation structure 10 according to an embodiment of the present invention may further include a height adjustment unit 400 .

A plurality of height adjustment units 400 are installed on the side of the base unit 200 while forming a set interval to elevate the base unit 200 . Specifically, the height adjustment unit 400 raises and lowers the housing 210 of the base unit 200 with a retractor. Using each retractor, the height of the housing 210 is individually adjusted to fit the topography of the underwater floor. It is possible to level the underwater foundation structure 10 together with the high-elastic geotextile or rubber membrane 240 before fixing it with concrete pouring.

Specifically, as an example of the retractor, a pneumatic cylinder and a hydraulic cylinder method are mainly used. Specifically, the pneumatic cylinder is also called a compressed air cylinder, and converts the energy of compressed air into mechanical reciprocating linear motion. is a device that A hydraulic cylinder is a machine that realizes linear motion of large output and thrust using hydraulic pressure. A hydraulic jack, which is a case of using hydraulic pressure among the retractors, is provided between the separation of the holder support members to elevate the holder support members. That is, the hydraulic jack may be inserted between the upper and lower leg portions of the holder support member to adjust the length of the leg portion while connecting the leg portions. The hydraulic jack actuator may be connected to the hydraulic jack to provide hydraulic pressure to the hydraulic jack for driving the hydraulic jack. That is, the hydraulic jack driver may extend the length of the hydraulic jack by providing hydraulic pressure to the hydraulic jack or discharge the hydraulic pressure to reduce the length of the hydraulic jack while expanding/relaxing the leg portion.

The multiple bulkhead type hollow underwater foundation structure of the present invention may further include a controller in which the height adjustment unit 400 and the connection hole 30 are respectively connected to control the operation of the height adjustment unit 400 and the connection hole 30 can In addition, the controller is interlocked with any one of a mobile terminal, etc., a Wi-Fi communication module, a Bluetooth communication module, and a Zigbee communication module to remotely raise and lower the height adjustment unit 400 and the connection hole 30. It is possible to control the operation of the opening and closing of the

That is, the operator can use any one of a Bluetooth communication module, a Wi-Fi communication module, and a Zigbee communication module for the controller, but it is not limited to the above method and can be used by selecting the best method.

As a method for manufacturing and installing a multi-bulk wall type hollow underwater foundation structure according to an embodiment of the present invention, it is easy to transport by sea with a hollow floating concept by actively utilizing a hollow gravity type foundation, and when installed in water, Ballasting Water (ballast water) After fixing the installation position of the structure body using the

Specifically, the multiple bulkhead type hollow underwater foundation structure according to an embodiment of the present invention can create a compartment 220 space for the ballast tank in the concrete lower space and can be separated by a bulkhead. After the construction of the underwater foundation structure 10 on land using the compartment 220 , the structure body 100 is floated on the sea and can be moved. For the convenience of movement, it is possible to move the structure body 100 by lying down 90 degrees using the compartment 220 which is a ballast tank during movement. When the structure body 100 reaches the construction position, it can be fixed while filling the compartment 220 that is a ballast tank with water and sinking it into the water. The buoyancy can be used by adjusting the thickness of the concrete wall and the volume of the ballast tank 220 .

In addition, ballast water is supplied to the compartment 220 that is each ballast tank through the second flow path 330 , and ballast water movement is possible in the adjacent compartment 220 through the connection hole 30 , and the group connection hole 30 ) can be opened or closed by a person or can be automatically controlled by the control of the controller, and the verticality can be controlled by injecting air into the compartment 220 after the underwater foundation structure 10 is seated in the ground. After the verticality control is completed, the inside of the compartment 220 is filled with a filling material such as cast-in-place concrete or mortar, and the work is completed.

According to an embodiment of the present invention, if appropriate water is injected into multiple bulkheads to reflect the floating concept during transport to create a state close to neutral buoyancy, the floating state can be maintained, and in this state, direct transport by a tugboat is possible. do. In addition, the optimal structure can be constructed by controlling the construction position and adjusting the cross section of the bulkhead by water injection of multiple bulkheads during underwater construction.

In addition, according to an embodiment of the present invention, it is possible to closely fix the bottom surface of the foundation and the body of the structure by pouring cast-in-place concrete that conforms to the uneven surface of the seabed.

In addition, high cost is required for leveling when the rocky ground is not flat.

In addition, it is easy to secure quality due to onshore production, and it is possible to maintain safety due to the weight of the structure, and since the interior is empty, it can be installed as a small marine equipment.

In addition, it is possible to control the verticality by using the retractor at the bottom of the housing 210, it is possible to prevent the loss of the underwater concrete by using the high elastic geotextile membrane 240.

In addition, there is a feature of improving construction performance and reducing maintenance costs for installation and maintenance by manufacturing a barge dedicated to the underwater foundation structure (10).

The detailed description of the preferred embodiments of the present invention disclosed as described above is provided to enable any person skilled in the art to make and practice the present invention. Although the above has been described with reference to preferred embodiments of the present invention, it will be understood by those skilled in the art that various modifications and changes can be made to the present invention without departing from the scope of the present invention. For example, a person skilled in the art may use each configuration described in the above-described embodiments in a way that is combined with each other. Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention. Accordingly, the above detailed description should not be construed as restrictive in all respects but as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention. The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, claims that are not explicitly cited in the claims may be combined to form an embodiment, or may be included as new claims by amendment after filing.

10: underwater foundation structure
20: marine facilities
30: connection hole
100: structure body
200: base unit
210: housing
220: compartment
230: concrete buried room
240: high elasticity flexible membrane
300: support unit
310: support member
320: 1st Euro
330: 2nd Euro
400: height adjustment unit

Claims (9)

As an underwater foundation structure that provides a foundation for offshore facilities installed in the sea,
a structure body fixed in water to provide a space in which the offshore facility is supported;
a base unit fixed to the bottom of the water while forming a lower portion of the structure body; and
A support unit installed in the upper center of the base unit and providing a supporting force to which the offshore facility is connected and supported; includes;
The base unit is
The buoyancy is controlled by enabling the submersion of the structure body through the inflow and outflow of ballast water,
The base unit is
A housing providing a space in which cast-in-place concrete is embedded and ballast water is injected;
a plurality of compartments formed at an upper portion of the housing to provide a space for injecting ballast water and separated by a plurality of partition walls;
Concrete embedding room located in the lower part of the compartment to provide a space in which concrete is poured and cured in the field; and
It is installed while finishing the open lower part of the concrete embedding room to prevent the loss of concrete and at the same time, a highly elastic flexible membrane that can adhere to the bottom of the underwater ground; includes;
The support unit is
a support member installed in the center of the upper portion of the base unit to provide a space in which the offshore facility is fixed;
a first flow passage penetrating the upper and lower portions of the support member and connected to the concrete embedding chamber to provide a flow passage through which concrete is injected in the field; and
a second flow passage that penetrates the upper and lower portions of the support member and is connected to each of the compartments to provide a flow passage through which ballast water, air, and concrete are injected;
By injecting ballast water into the compartment through the second flow path, the body of the structure is submerged in water and seated on the ground,
After the structure body is seated on the ground, air is injected into the compartment through the second flow path to control the verticality of the structure body,
After the posture of the structure body is fixed, concrete is poured through the second flow path to fill each of the compartments,
The support unit is
It is provided on the upper portion of the support member so as to be openable and openable, and further comprising a cover that blocks foreign substances from seawater from flowing into the compartment and the concrete embedded chamber through the first and second flow passages when the underwater foundation structure moves in the sea,
The highly elastic flexible membrane,
Multiple bulkhead hollow type underwater foundation structure, characterized in that it is fixed to the underwater floor by being in close contact with the uneven terrain of the underwater floor.
delete delete The method according to claim 1,
The material of the high-elasticity flexible membrane is a multi-barrier-type hollow underwater foundation structure, characterized in that it is made of any one of high-elastic geotextiles, plastics and rubber membranes.
The method according to claim 1,
A plurality of height adjustment units installed on the side of the base unit to elevate the base unit; Multiple bulkhead type hollow underwater foundation structure, characterized in that it further comprises.
The method according to claim 1,
The bulkhead of the compartment is formed with a connection hole that can communicate with each other, so that the ballast water can move.
7. The method of claim 6,
The connection hole is manufactured to be able to open and close to control the movement of ballast water, characterized in that the multiple bulkhead hollow underwater foundation structure.
delete delete

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