KR20130028312A - Offshore structure having making part for lifting power and structure method thereof - Google Patents

Offshore structure having making part for lifting power and structure method thereof Download PDF

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Publication number
KR20130028312A
KR20130028312A KR1020110091772A KR20110091772A KR20130028312A KR 20130028312 A KR20130028312 A KR 20130028312A KR 1020110091772 A KR1020110091772 A KR 1020110091772A KR 20110091772 A KR20110091772 A KR 20110091772A KR 20130028312 A KR20130028312 A KR 20130028312A
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KR
South Korea
Prior art keywords
buoyancy
buoyancy forming
offshore structure
forming portion
concrete tube
Prior art date
Application number
KR1020110091772A
Other languages
Korean (ko)
Inventor
김기두
지광습
Original Assignee
건국대학교 산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 건국대학교 산학협력단 filed Critical 건국대학교 산학협력단
Priority to KR1020110091772A priority Critical patent/KR20130028312A/en
Publication of KR20130028312A publication Critical patent/KR20130028312A/en

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    • 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
    • E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
    • 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
    • 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
    • E02B2017/0039—Methods for placing the offshore structure

Abstract

The present invention is formed in a cylindrical shape having a predetermined height and a hollow concrete tube formed in the center; A steel pipe inserted into and fixed in the hollow of the concrete tube, the part protruding upward of the sea surface, and having a structure seated on the upper surface thereof; A buoyancy forming unit formed integrally with the concrete tube on the lower side of the concrete tube and forming buoyancy to support the concrete tube and the steel pipe; A pile mounting part provided on the lower circumferential surface of the buoyancy forming part and formed in a central area through the pile mounting hole to be seated on the sea bottom; By presenting the offshore structure with buoyancy forming part, it reduces the material cost by reducing the amount of concrete required to manufacture the offshore structure, while reducing the weight of the offshore structure and reducing the load burden on the offshore structure itself by using buoyancy. Can improve the bearing capacity.

Description

Offshore structure with buoyancy forming part and construction method thereof {OFFSHORE STRUCTURE HAVING MAKING PART FOR LIFTING POWER AND STRUCTURE METHOD THEREOF}

The present invention relates to the field of construction, and more particularly to a marine structure having a buoyancy forming portion and a construction method thereof.

In general, an offshore structure is a structure that is installed on the ground in order to install various objects on the sea.

These offshore structures are always subjected to external forces due to waves, tides, winds and the like. As a result, these offshore structures are often formed of a concrete material resistant to external force and resistant to corrosion.

1 is a cross-sectional view showing the structure of a conventional offshore structure.

As shown in FIG. 1, a cone-shaped fall prevention portion 2 is formed at the bottom of the main body 1 so that the main body 1 is not conducted by strong wind, waves, earthquakes, etc. at sea. In order to prevent sliding, the sliding prevention part 3 is formed by sandstone etc.

However, in such a conventional offshore structure, since the entire offshore structure is formed of a concrete material, a large amount of concrete is required to manufacture the offshore structure.

In addition, since the entire offshore structure is formed of concrete, there is a problem in that it is not easy to install the offshore structure in the sea as well as it takes a lot of cost and effort to transport the offshore structure to install such offshore structure due to the excessive weight.

The present invention was derived to solve the above problems, reducing the cost of materials by reducing the amount of concrete required to manufacture the offshore structure, while reducing the weight of the offshore structure and using the buoyancy load burden of the offshore structure itself It is an object of the present invention to propose a marine structure having a buoyancy forming unit that can reduce the force to improve the bearing capacity.

In order to solve the above problems, the present invention is formed into a cylindrical shape having a constant height and a hollow tube formed in the center; A steel pipe inserted into and fixed in the hollow of the concrete tube, the part protruding upward of the sea surface, and having a structure seated on the upper surface thereof; A buoyancy forming unit formed integrally with the concrete tube on the lower side of the concrete tube and forming buoyancy to support the concrete tube and the steel pipe; A pile mounting part provided on the lower circumferential surface of the buoyancy forming part and formed in a central area through the pile mounting hole to be seated on the sea bottom; It proposes an offshore structure having a buoyancy forming unit, characterized in that it comprises.

Here, the buoyancy forming portion may be composed of a buoyancy forming space portion formed therein and a communication tube for communicating the buoyancy forming space portion and the hollow of the concrete tube.

In addition, a separate partition wall is installed in the buoyancy forming space part to be divided into a plurality of spaces, and the plurality of communication tubes may be provided so that the plurality of spaces and the hollow may communicate with each other.

In addition, the partition wall may be formed along the transverse direction of the buoyancy forming part, and the plurality of spaces may be sequentially disposed along the height direction of the buoyancy forming part.

In addition, the buoyancy forming portion may be formed in a conical shape.

The pile mounting part may protrude downward along the height direction of the buoyancy forming part so that the bottom surface of the buoyancy forming part may be spaced apart from the sea bottom by a predetermined interval.

In order to solve the above problems, the present invention includes a first step of filling the plurality of spaces of the buoyancy forming space portion through the communication tube; A second step of allowing the pile mounting portion to come in contact with the sea bottom so as to seat the buoyancy forming part on the sea bottom; A third step of inserting a file into a file mounting hole of the file mounting unit and driving the file; A fourth step of discharging water filled in the buoyancy-forming space portion to the outside through the communication tube; It proposes a construction method of a marine structure having a buoyancy forming portion, including.

Here, the first step may selectively fill the plurality of spaces according to the degree of buoyancy required to fill the water.

The present invention has the effect of reducing the cost of the material by reducing the amount of concrete required to manufacture the offshore structure and at the same time reduce the weight of the offshore structure and reduce the load burden on the offshore structure itself by using buoyancy to improve the bearing capacity. .

1 is a plan view showing a structure in which a conventional marine structure is installed on the sea bottom;
2 is a perspective view illustrating a structure of an offshore structure having a buoyancy forming unit according to an embodiment of the present invention;
Figure 3 is a cross-sectional view showing the structure of the offshore structure having a buoyancy forming portion according to an embodiment of the present invention,
4 is a flowchart sequentially describing a process of installing an offshore structure having a buoyancy forming part 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.

2 is a perspective view illustrating a structure of an offshore structure having a buoyancy forming part according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view illustrating a structure of an offshore structure having a buoyancy forming part according to an embodiment of the present invention. 4 is a flowchart sequentially describing a process of installing an offshore structure provided with a buoyancy forming unit according to an embodiment of the present invention.

As shown in these figures, the marine structure having a buoyancy forming part according to the present invention is formed in a cylindrical shape having a constant height and the concrete tube 100, the hollow tube 110 is formed in the center, the concrete tube 100 It is inserted into the hollow 110 of the fixed portion of the steel pipe 200 is projected to the upper side of the sea surface and the structure is seated on the upper surface of the concrete tube 100 is formed integrally with the concrete tube 100 and buoyancy It is formed on the buoyancy forming unit 300 to support the concrete tube 100 and the steel pipe 200, and is provided on the lower circumferential surface of the buoyancy forming unit 300 and the pile mounting hole 410 is formed in the central area through the seabed It is configured to include a file mounting portion 400 seated on the surface.

Concrete tube 100 is a cylindrical member is formed through the hollow 110 is inserted into the center of the steel pipe 200 is a separate structure is seated.

 Although not shown in the drawing, a plurality of tension members disposed in a straight line along the height direction and a plurality of tension members disposed in a circle along the circumferential direction are embedded in the concrete tube 100.

The steel pipe 200 is inserted into the hollow 110 of the concrete tube 100, is formed so that a portion of the area to be exposed to the upper side of the sea surface is a separate structure to be installed on the upper surface is seated .

Like the concrete tube 100, the steel pipe 200 is also preferably formed through the hollow 210 in the center and is fixed to the inner surface of the concrete tube 100 to support a separate structure.

The buoyancy forming unit 300 may be composed of a buoyancy forming space 310 formed therein, a communication tube 320 for communicating the buoyancy forming space 310 and the hollow 110 of the concrete tube 100. .

A separate partition wall 330 is installed in the buoyancy forming space 310 to divide the buoyancy forming space 310 into a first space portion 311 and a second space portion 312. If necessary, the 310 may further include a separate space portion other than the first space portion 311 and the second space portion 312.

However, the partition wall 330 may be formed along the transverse direction of the buoyancy forming part 300, and the plurality of spaces 311 and 312 may be sequentially disposed along the height direction of the buoyancy forming part 300.

This is because the plurality of spaces 311 and 312 are arranged along the transverse direction without being sequentially disposed along the height direction of the buoyancy forming unit 300, and the buoyancy is buoyancy when only one of the spaces is formed. This is to prevent the bearing force of the buoyancy forming part 300 from being eccentric because it does not work evenly over the entire area of the forming part 300.

When the buoyancy-forming space portion 310 is divided into the first space portion 311, the second space portion 312 and another separate space portion as described above, a plurality of communication tubes 320 are also provided in the plurality of spaces. Preferably, the parts 311 and 312 are installed to communicate with the hollow 110, respectively.

This is to effectively support the structure by selectively adjusting the buoyancy acting on the buoyancy forming part 300 according to the weight or shape of the separate structure that the marine structure should support.

The buoyancy forming unit 300 is preferably formed in a conical shape whose diameter is gradually reduced toward the upper side along the height direction so that the center of gravity is formed at the lower side to stably support the structure to be supported.

In addition, the buoyancy forming part is provided by the pile mounting part 400 which is provided on the lower circumferential surface of the buoyancy forming part 300 to support the buoyancy forming part 300 and is fixed to the sea bottom of the buoyancy forming part 300. 300, the bottom surface is preferably installed to be spaced a certain distance from the bottom.

Pile mounting portion 400 is formed to be expanded to have a diameter larger than the diameter of the buoyancy forming portion 300 is a shape having a step surface for inserting the pile 420 may be any shape, reducing material costs In order to be able to do so, as in the present embodiment, a plurality of locations around the buoyancy forming part 300 may be formed to be spaced apart from each other along a circumferential direction of the buoyancy forming part 300.

At this time, the pile mounting portion 400 is preferably formed in a plurality so as to form a radial shape in a position opposite to each other.

A pile mounting hole 410 through which the pile 420 for fixing the buoyancy forming unit 300 to the sea bottom is inserted in the central region of the pile mounting unit 400, and the bottom surface of the buoyancy forming unit 300 is subsea. The pile mounting part 400 may be formed to protrude downward along the height direction of the buoyancy forming part 300 so as to be spaced apart from the surface by a predetermined interval.

Method for constructing a marine structure having a buoyancy forming unit according to an embodiment of the present invention having such a configuration on the sea bottom is as follows.

First, after manufacturing the offshore structure having a buoyancy forming portion on the ground, and then filled the water through the communication pipe 320 to the buoyancy forming space portion 310 of the buoyancy forming portion 300 and then using the offshore crane Descend to the bottom of the sea and install it underwater.

At this time, depending on the weight or shape of the structure installed on the upper surface of the steel pipe 200, only water in any one of the first space portion 311 and the second space portion 312 of the buoyancy forming space portion 310. May be filled or both the first space portion 311 and the second space portion 312 may be filled with water, if necessary.

Then, when the offshore structure is lowered to the sea bottom, the pile mounting part 400 provided on the lower circumferential surface of the offshore structure is seated on the sea bottom so that the bottom surface of the buoyancy forming part 300 of the offshore structure is spaced apart from the sea bottom by a predetermined interval. It becomes a state.

Thereafter, the pile 420 is inserted into the pile mounting hole 410 of the pile mounting part 400 and driven to fix the marine structure to the sea bottom.

At this time, when the file 420 is driven to be inserted into the sea bottom so that a predetermined length of the upper end of the file 420 is protruded to the upper side of the file mounting part 410, the file 420 is fixed to the upper side of the file mounting part 400. The periphery of the upper end of the protruding length of the pile 420 and the pile mounting portion 400 is bonded.

When the offshore structure is fixed to the sea bottom surface, the water filled in the buoyancy-forming space 310 through the communication tube 320 to the outside, the installation of the offshore structure is completed by closing the inlet of the communication tube 320.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It is to be understood that both the technical idea and the technical spirit of the invention are included in the scope of the present invention.

100: concrete tube 110: hollow
200: steel pipe 210: hollow
300: buoyancy forming unit 310: buoyancy forming space
311: first space part 312: second space part
320: communication tube 330: bulkhead
400: file mounting unit 410: file mounting hole
420: file

Claims (8)

A concrete tube formed in a cylindrical shape having a constant height and having a hollow formed in the center thereof;
A steel pipe inserted into and fixed in the hollow of the concrete tube, the part protruding upward of the sea surface, and having a structure seated on the upper surface thereof;
A buoyancy forming unit formed integrally with the concrete tube on the lower side of the concrete tube and forming buoyancy to support the concrete tube and the steel pipe;
A pile mounting part provided on the lower circumferential surface of the buoyancy forming part and formed in a central area through the pile mounting hole to be seated on the sea bottom;
Offshore structure having a buoyancy forming portion, characterized in that it comprises. The method of claim 1,
The buoyancy forming unit is a marine structure having a buoyancy forming portion, characterized in that the buoyancy forming space portion formed therein and the buoyancy forming space portion and the communication tube for communicating the hollow of the concrete tube. The method of claim 2,
The buoyancy forming space portion is provided with a separate partition wall is divided into a plurality of spaces, the communication pipe is provided with a plurality of offshore structure having a buoyancy forming portion, characterized in that the plurality of spaces and the hollow is provided in communication with each other. . The method of claim 3,
The partition wall is formed along the transverse direction of the buoyancy forming portion, the plurality of spaces are marine structures having a buoyancy forming portion, characterized in that arranged sequentially along the height direction of the buoyancy forming portion. The method of claim 1,
The buoyancy forming portion offshore structure having a buoyancy forming portion, characterized in that formed in a conical shape. The method of claim 1,
The pile mounting portion is a marine structure having a buoyancy forming portion, characterized in that the bottom surface of the buoyancy forming portion is formed to protrude downward along the height direction of the buoyancy forming portion so as to be spaced apart from the sea bottom by a predetermined interval. A method for constructing an offshore structure having a buoyancy forming part according to any one of claims 1 to 6 on the sea floor,
A first step of filling water into a plurality of spaces of the buoyancy forming space portion through a communication tube;
A second step of allowing the pile mounting portion to come in contact with the sea bottom so as to seat the buoyancy forming part on the sea bottom;
A third step of inserting a file into a file mounting hole of the file mounting unit and driving the file;
A fourth step of discharging water filled in the buoyancy-forming space portion to the outside through the communication tube;
Construction method of a marine structure having a buoyancy forming portion comprising a. The method of claim 7, wherein
The first step is a construction method of a marine structure having a buoyancy forming portion, characterized in that for filling the water selectively by selecting the plurality of spaces according to the degree of buoyancy required.
KR1020110091772A 2011-09-09 2011-09-09 Offshore structure having making part for lifting power and structure method thereof KR20130028312A (en)

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KR1020110091772A KR20130028312A (en) 2011-09-09 2011-09-09 Offshore structure having making part for lifting power and structure method thereof

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101399452B1 (en) * 2013-12-11 2014-05-28 (주)대우건설 Construction method for offshore structure
KR101443597B1 (en) * 2013-07-10 2014-09-23 한국건설기술연구원 Underwater Supporting Structure for Wind Turbine Tower, and Constructing Method thereof
KR20150076789A (en) * 2013-12-27 2015-07-07 건국대학교 산학협력단 Transition pieces of offshore wind turbines and whole structure of wind turbines having it
CN109024549A (en) * 2018-08-03 2018-12-18 中冶天工集团有限公司 A kind of construction method that backfill region prevents terrace from settling

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101443597B1 (en) * 2013-07-10 2014-09-23 한국건설기술연구원 Underwater Supporting Structure for Wind Turbine Tower, and Constructing Method thereof
KR101399452B1 (en) * 2013-12-11 2014-05-28 (주)대우건설 Construction method for offshore structure
KR20150076789A (en) * 2013-12-27 2015-07-07 건국대학교 산학협력단 Transition pieces of offshore wind turbines and whole structure of wind turbines having it
CN109024549A (en) * 2018-08-03 2018-12-18 中冶天工集团有限公司 A kind of construction method that backfill region prevents terrace from settling

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