KR102452240B1 - Precast concrete box structure for floating offshore structure and The construction method thereof - Google Patents

Abstract

The present invention relates to a precast concrete body structure for a floating offshore structure. The precast concrete body structure for a floating offshore structure comprises: a lower body, which is a precast concrete structure including a bottom plate and a wall provided on an upper side of the bottom plate and having a circular or polygonal shape; an intermediate body, which is a precast concrete structure installed on an upper side of the lower body and formed as a circular or polygonal wall; and an upper body, which a precast concrete structure installed on an upper side of the intermediate body and formed as a circular or polygonal wall. The lower body, the intermediate body, and the upper body are integrated vertically by PS steel. The upper body has a shape with the diameter decreasing toward an upper portion thereof. Therefore, the precast concrete body structure for a floating offshore structure allows the bodies having the precast concrete structure and divided into a plurality of pieces to be coupled and integrated by PS steel, thereby increasing economic feasibility, achieving high structural joinability, obtaining good stability in manufacturing, and being recycled as a fish reef after use.

Description

Precast concrete box structure for floating offshore structure and The construction method thereof

The present invention relates to a precast reinforced concrete enclosure structure for floating offshore structures and a construction method therefor, and more particularly, by manufacturing a plurality of divided enclosures and then assembling them to complete the enclosure structure, construction is easy and construction costs are saved. It relates to a precast reinforced concrete enclosure structure for floating offshore structures and a construction method therefor.

Conventionally, the floating hull structure used in wind power generation, offshore berthing facilities, etc. is mainly used to make structures such as circular columns and polygonal columns using steel. This housing structure mainly uses a steel material, so there is a problem that the construction cost is excessive and the economical efficiency is lowered, so that it cannot be universally applied.

In order to solve this problem, reinforced concrete is used instead of steel to fabricate the housing structure, but it is difficult to manufacture a massive structure with a diameter of 30-50 m and a height of 40-70 m as a reinforced concrete structure. It exists, and has the disadvantage of being complicated and difficult to manufacture and install. Therefore, the reinforced concrete housing structure is also not universally used and the priority is being pushed to the steel structure.

Accordingly, there is a demand for a technique for manufacturing an economical and easy-to-manufacture housing structure.

Republic of Korea Patent Publication No. 10-1558150

The present invention has been devised to solve the above problems, and an object of the present invention is to combine a housing of a precast reinforced concrete structure divided into a plurality of pieces with PS steel and integrate them, thereby providing high economic feasibility, high structural bondability, and manufacturing To provide a precast reinforced concrete enclosure structure for floating offshore structures that has good stability and can be recycled as a reef after use and a construction method thereof.

The precast reinforced concrete enclosure structure for floating offshore structures according to an example of the present invention includes a bottom plate and a lower enclosure that is a precast reinforced concrete structure including a circular or polygonal-shaped wall as provided on the upper side of the bottom plate; an intermediate housing having a precast reinforced concrete structure with a circular or polygonal-shaped wall to be installed on the upper side of the lower housing; It is installed on the upper side of the intermediate housing and is a precast reinforced concrete structure with a wall of a circular or polygonal shape, an upper housing; including, wherein the lower housing, the intermediate housing and the upper housing are integrally coupled up and down by PS steel, The upper housing may be characterized in that the diameter is narrowed toward the upper portion.

The intermediate housing can be increased or decreased in height by one or more.

It may further include an anchor connector provided on the bottom plate of the lower plate.

The intermediate housing and the upper housing are composed of a plurality of segments divided in the circumferential direction, and the segments divided into a plurality of segments in the circumferential direction may be coupled to each other in the circumferential direction by a PS steel material.

The lower housing, the intermediate housing and the upper housing are interposed between each other or/and the plurality of segments of the intermediate housing are interposed and/or the plurality of segments of the upper housing are interposed by the concavo-convex portion formed on the joint surface. can

The lower, middle and upper enclosures may be coupled to each other by a joint bolt, and/or between the plurality of segments of the middle box and/or between the plurality of segments of the upper enclosure.

The lower enclosure, the middle enclosure and the upper enclosure may be coupled to each other by a connecting reinforcing bar and a mortar between the plurality of segments of the middle enclosure and/or between the plurality of segments of the upper enclosure .

A plurality of fixing blocks made of PS steel for integrally coupling the lower housing, the intermediate housing, and the upper housing up and down may be formed to protrude along the outer circumferential surface in the upper part of the upper housing and the lower part of the lower housing.

A plurality of precast reinforced concrete enclosure structures for floating offshore structures are installed to be spaced apart from each other, and a plurality of precast reinforced concrete enclosure structures for floating offshore structures installed spaced apart from each other may further include a steel coupling frame for mutually coupling each other. have.

The steel coupling frame includes peripheral frames surrounding each of the plurality of precast reinforced concrete enclosure structures for floating offshore structures, connecting frames connecting the peripheral frames to each other, and connecting the inner sides of the connecting frames in a closed polygonal shape. It may include an internal frame, an inclined frame for connecting between the connecting frame and the peripheral frame.

It can be recycled as a fish reef by submerging in water after the end of its useful life by further including a hole formed in the precast reinforced concrete housing structure for the floating offshore structure.

A method of constructing a precast reinforced concrete enclosure structure for a floating offshore structure according to an example of the present invention comprises the steps of: creating a production site around the water part; Installing a rail on the floor surface of the production site from the land part to the water part; manufacturing the lower housing, the intermediate housing and the upper housing on the rail and vertically combining them with the PS steel material; coupling the steel tower to the upper side of the upper enclosure; binding an anchor chain to an anchor connector provided on the bottom plate of the lower enclosure; launching the floating part by sliding the precast reinforced concrete enclosure structure for the floating offshore structure from the upper side of the rail; injecting a certain amount of water into the precast reinforced concrete housing structure for the floating offshore structure and then pulling it to the installation location; adding water or sand into the precast reinforced concrete enclosure structure for the floating offshore structure and adjusting it to go down to the final installation level; It may include; connecting and fixing the anchor chain to the anchor or anchor block of the lower surface.

The step of sliding from the upper side of the rail to launching the water unit is performed by a sliding system, and the sliding system includes a sliding pad installed on the upper side of the rail, a hydraulic jack anchor installed on the upper side of the sliding pad, and the hydraulic jack anchor. It may include a plurality of hydraulic jacks installed on the upper side, and a sliding hydraulic jack for pulling the hydraulic jack anchor.

The sliding pad may be made of polytetrafluoroethylene (PTFE).

According to the present invention, by combining the housing of the precast reinforced concrete structure divided into a plurality of parts with PS steel and integrating it, the economical efficiency, the structural bondability, the manufacturing stability is good, and it can be recycled as a reef after use.

1a is a side view and a plan view of a precast reinforced concrete enclosure structure for a floating offshore structure according to an example of the present invention;
1b is a side view and a cross-sectional view of a precast reinforced concrete enclosure structure for a floating offshore structure according to an example of the present invention;
1c is another cross-sectional view of a precast reinforced concrete enclosure structure for a floating offshore structure according to an example of the present invention;
1d is a three-dimensional view and an installation example of a precast reinforced concrete enclosure structure for a floating offshore structure according to an example of the present invention;
2a is a side view and a plan view of a precast reinforced concrete enclosure structure for a floating offshore structure according to another example of the present invention;
2b is a side view and a cross-sectional view of a precast reinforced concrete enclosure structure for a floating offshore structure according to another example of the present invention;
Figure 2c is a three-dimensional view and an installation example of a precast reinforced concrete enclosure structure for a floating offshore structure according to another example of the present invention;
Figure 3a is a view in which a steel coupling frame for mutually coupling a plurality of precast reinforced concrete enclosure structures for floating offshore structures of the present invention is installed;
Fig. 3b is a plan view of Fig. 3a;
Fig. 3c is a side view of Fig. 3a;
Figure 4a is a view showing a state in which the bonding surface of the present invention is coupled to each other by a connecting reinforcing bar and mortar;
Figure 4b is a view showing a state that the bonding surface of the present invention is fitted by the concave-convex portion,
Figure 4c is a view showing a state that the bonding surface of the present invention is coupled to each other by a bonding bolt,
Figure 5a is a view showing the step of creating a production site around the receiving part of the present invention,
Figure 5b is a view showing the step of installing the rail from the land part to the water part on the floor surface of the production site of the present invention;
Figure 5c is a view showing a state of manufacturing the precast reinforced concrete enclosure structure for floating offshore structures on the upper side of the rail of the present invention
Figure 5d is a view showing the assembling of the precast reinforced concrete enclosure structure for floating offshore structures of the present invention as an upper enclosure, an intermediate enclosure, and a lower enclosure; drawing showing how to do it,
Figure 5e is a view showing the state of combining in the circumferential direction with PS steel when the upper and middle housings of the precast reinforced concrete housing structure for floating offshore structures of the present invention are manufactured with a plurality of segments;
Figure 5f is a view showing a state of combining the upper and lower housing, intermediate and lower housing of the precast reinforced concrete housing structure for floating offshore structures of the present invention with PS steel up and down;
Figure 5g is a view showing a state in which the steel tower is coupled to the upper part of the precast reinforced concrete enclosure structure for floating offshore structures of the present invention;
Figure 5h is a view showing a state in which the anchor chain is coupled to the lower part of the precast reinforced concrete enclosure structure for floating offshore structures of the present invention;
Figure 5i is a view showing a state that the precast reinforced concrete enclosure structure for floating offshore structures of the present invention is launched on the water surface,
Figure 5j is a view showing a state of towing to the installation position by injecting water into the precast reinforced concrete enclosure structure for floating offshore structures of the present invention;
Figure 5k is a view showing a state of adjusting to the final installation level by adding water or sand into the inside of the precast reinforced concrete enclosure structure for floating offshore structures of the present invention;
Figure 5l is a view showing a state in which the precast reinforced concrete enclosure structure for a floating offshore structure of the present invention is connected and fixed to an anchor or anchor block of the lower surface with an anchor chain;

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is between each component. may be “connected”, “coupled” or “connected”.

With reference to the drawings, the structure of the precast reinforced concrete enclosure for floating offshore structures according to an example of the present invention will be described.

1A is a side view and a plan view of a precast reinforced concrete enclosure structure for a floating offshore structure according to an example of the present invention, FIG. 1B is a side view and a cross-sectional view, FIG. 1C is another cross-sectional view, FIG. 2a is a side view and a plan view of a precast reinforced concrete enclosure structure for a floating offshore structure according to another example of the present invention, FIG. 2b is a side view and cross-sectional view of FIG. 2a, FIG. 2c is a three-dimensional view and an installation example of FIG. is a view in which a steel coupling frame 60 for mutually coupling a plurality of precast reinforced concrete enclosure structures for floating offshore structures of the present invention is installed, FIG. 3b is a plan view of FIG. 3a, FIG. 3c is a side view of FIG. 3a, Figure 4a is a view showing a state that the bonding surface of the present invention is coupled to each other by the connecting reinforcing bar 54 and the mortar 56, Figure 4b is a view showing the state that the bonding surface is fitted by the concave-convex portion (50) and FIG. 4c is a view showing a state in which the bonding surfaces are coupled to each other by the bonding bolts 52 .

1a, 1b, 1c, 1d, the precast reinforced concrete enclosure structure for a floating offshore structure according to an example of the present invention is provided on the bottom plate and the upper side of the bottom plate and includes a wall of a circular or polygonal shape The lower enclosure 10, which is a precast reinforced concrete structure; Intermediate housing 20, which is installed on the upper side of the lower housing 10, and is a precast reinforced concrete structure with a wall of a circular or polygonal shape; It may include; may include;

The lower enclosure 10 may be combined after the bottom plate and the wall are integrally formed or manufactured separately. The bottom plate has a larger diameter than the wall, so it can secure anchor connectors and at the same time increase stability against waves and tsunamis on the water. The wall of the lower housing 10 may be formed in a circular shape, a triangle shape, a square shape, or the like.

The bottom plate of the lower plate may further include an anchor connector. The anchor connector may be formed vertically through the bottom plate. The anchor fixture and the anchor chain 90 may be connected by using the anchor connector. The anchor fixture may include a ring-shaped fixing ring and a fixing rod inserted and fixed to the fixing ring. The fixing ring and the fixing rod may be coupled by welding or the like. A shock pad may be provided under the fixing ring. The shock pad may be formed in the same shape as the fixing ring and adhesively coupled to the fixing ring, or may be separately installed on the lower side. The shock pad may have a cylindrical shape with an open top to which a fixing ring is inserted. It can be installed by inserting a fixing ring inside this cylindrical shock pad. The shock pad can prevent the bottom plate from being damaged when the fixing ring collides with the bottom plate due to waves or the like.

The anchor chain 90 may be fixed to the anchor block 100 and the like at the same time as being connected to the fixing rod.

The intermediate housing 20 may be a wall, such as a circle, a triangle, a square. The cross-sectional shape of the intermediate housing 20 is the same as the shape of the wall of the lower housing 10 . One or more intermediate housings 20 may be stacked up and down. That is, one or more intermediate housings 20 may be stacked in consideration of the overall size of the housing structure. The intermediate housing 20 may also gradually decrease in diameter toward the top.

The upper housing 30 may be formed in a shape in which the diameter becomes narrower toward the upper portion. This reduces the size of the upper part with respect to the lower part, thereby increasing stability against waves, tsunamis, and the like. In addition, the size is well matched with the steel tower 80 coupled to the upper portion can facilitate the coupling. One or more upper housing 30 may also be stacked up and down. The upper housing 30 is also formed in the same wall shape as the intermediate housing 20, such as a circle, a triangle, a square.

The lower housing 10 , the intermediate housing 20 , and the upper housing 30 may be integrally coupled up and down by the PS steel material 40 . As such, by separately manufacturing and integrating the lower housing 10, the intermediate housing 20 and the upper housing 30, manufacturing and construction are easy and construction costs can be reduced. A sheath pipe for inserting the PS steel material 40 may be previously laid in the lower housing 10 , the intermediate housing 20 and the upper housing 30 . After the PS steel material 40 is inserted and tensioned into the sheath pipe, it can be grouted. If not grouting, oil may be injected to prevent corrosion. In the case of not grouting, it can be re-tensioned, which can be convenient for maintenance.

Referring to Figure 1c, the upper end of the lower housing 10 and the intermediate housing 20 may include a heonchi portion protruding along the inner circumference. This heonchi portion can facilitate adjustment of the installation position of the upper enclosure. In addition, the coupling force between the upper and lower housings can be increased, and the watertight effect can be increased at the same time.

Referring to FIG. 1D , in the present invention, an offshore structure such as a wind power generator may be installed on the upper side of the upper housing 30 .

2A, 2B, and 2C, as another example of the present invention, the intermediate housing 20 and the upper housing 30 are composed of segments divided into a plurality of segments in the circumferential direction, and segments divided into a plurality of segments in the circumferential direction. They may be coupled to each other in the circumferential direction by the PS steel (40). This makes it possible to manufacture the housing structure in a more subdivided manner, thereby facilitating manufacturing and saving manufacturing costs.

Referring to FIG. 4A , the lower housing 10, the intermediate housing 20 and the upper housing 30 are mutually or/and between the segments divided into a plurality of the intermediate housing 20 and/or the upper housing 30 ), the segments divided into a plurality of each other may be coupled to each other by a connecting reinforcing bar 54 and a mortar 56 . That is, the grooves are formed on both sides of the bonding surface, the connecting reinforcing bars 54 are exposed toward the grooves, and then the grooves are filled with mortar 56 and cured to be combined. The connecting reinforcing bar 54 and the mortar 56 may be constructed together with the concave-convex portion 50, the joint bolt 52, and the like, which will be described later. The mortar 56 may increase watertightness.

Referring to FIG. 4B , the lower housing 10 , the intermediate housing 20 and the upper housing 30 are mutually or/and between the segments divided into a plurality of the intermediate housing 20 and/or the upper housing 30 . ), the segments divided into a plurality of each other may be fitted and coupled by the concave-convex portion 50 formed on the joint surface. That is, by forming both bonding surfaces in a sawtooth shape and fitting them together, the structural bonding force can be increased. Water leakage can be prevented by performing a waterproof seal between the two bonding surfaces. The coupling by the concave-convex part 50 may be constructed together with the connection reinforcing bar 54 and the mortar 56 coupling, the bonding bolt 52 coupling to be described later, and the like.

Referring to FIG. 4C , the lower housing 10, the intermediate housing 20 and the upper housing 30 are mutually or/and between the segments divided into a plurality of the intermediate housing 20 and/or the upper housing 30 ) between the segments divided into a plurality of may be coupled to each other by a joint bolt (52). That is, referring to FIGS. 4C and 1 and 2, flanges protruding from the side surfaces of both bonding surfaces are formed, and the bonding bolt 52 composed of a bolt and a nut for connecting and coupling between the flanges can be fastened. have. This joint bolt 52 may be constructed together with the above-described concave-convex portion 50 coupling, connecting reinforcing bar 54 and mortar 56 coupling, and the like.

Referring to FIGS. 1 and 2 , the fixing block of the PS steel material 40 for integrally coupling the lower housing 10 , the intermediate housing 20 and the upper housing 30 up and down is the upper part of the upper housing 30 . and a plurality of protrusions may be formed along the outer circumferential surface at the lower portion of the lower housing 10 .

3A to 3C, the plurality of precast reinforced concrete enclosure structures for floating offshore structures are installed to be spaced apart from each other, and the plurality of precast reinforced concrete enclosure structures for floating offshore structures installed spaced apart from each other are mutually coupled It may further include a steel bonding frame (60).

The steel coupling frame 60 includes peripheral frames 62 surrounding each of the plurality of precast reinforced concrete enclosure structures for floating offshore structures, and connecting frames 64 connecting the peripheral frames 62 to each other. , an inner frame connecting the inside of the connecting frame 64 in a closed polygonal shape, and an inclined frame connecting between the connecting frame 64 and the peripheral frame 62 .

The circumferential frame 62 may have a circular or polygonal shape. The perimeter frame 62 can be used by making an H-shaped steel in a circular or polygonal shape. That is, the shape of the peripheral frame 62 is preferably the same as the shape of the housing structure.

The connecting frame 64 may connect the peripheral frames 62 to each other. For example, when there are three housing structures, the connection frame 64 may be installed in a triangular shape.

The inner frame can increase the stability of the connection state by coupling the connecting frame 64 to each other. In the case of three housing structures, the inner frame may also be installed in a triangular shape.

In addition, it may include an inclined frame connected to the peripheral frame 62 and the end of the connection frame (64).

The precast reinforced concrete enclosure structure for floating offshore structures composed of one or more can be recycled as a reef by forming a hole after the service life is over and sinking it in water. This is possible because the enclosure structure has a space inside. Accordingly, it is not only economical but also eco-friendly because there is no need to move, dismantle, or dispose of as waste the end-of-life enclosure structure.

5A to 5L, a construction method of a precast reinforced concrete enclosure structure for a floating offshore structure according to an example of the present invention will be described.

Figure 5a is a view showing the step of creating a production site around the water receiving part of the present invention, Figure 5b is a view showing the step of installing the rail 70 on the floor surface of the production site of the present invention from the land part to the water receiving part, Figure 5c is a view showing a state of manufacturing a precast reinforced concrete enclosure structure for floating offshore structures on the upper side of the rail 70 of the present invention, Figure 5d is a precast reinforced concrete enclosure structure for floating offshore structures of the present invention A drawing showing the assembling of the upper housing 30, the intermediate housing 20, and the lower housing 10, respectively, and the upper housing 30 and the intermediate housing 20 are manufactured and assembled in a plurality of segments In the case of manufacturing the upper housing 30 and the intermediate housing 20 of the precast reinforced concrete housing structure for floating offshore structures of the present invention in a plurality of segments, FIG. 5e is a PS steel material 40 in the circumferential direction It is a view showing a state of being coupled to, and Figure 5f is the upper housing 30, the intermediate housing 20, the lower housing 10 of the precast reinforced concrete housing structure for floating offshore structures of the present invention PS steel (40) It is a view showing a state of being combined vertically with a furnace, and FIG. 5g is a view showing a state that the steel tower 80 is coupled to the upper part of the precast reinforced concrete enclosure structure for a floating offshore structure of the present invention, and FIG. 5h is the present invention It is a view showing the state that the anchor chain 90 is coupled to the lower part of the precast reinforced concrete enclosure structure for floating offshore structures of It is a view showing a state of being launched, Figure 5j is a view showing a state of towing to the installation position by injecting water into the inside of the precast reinforced concrete enclosure structure for floating offshore structures of the present invention, Figure 5k is the floating structure of the present invention It is a view showing the state of adjusting to the final installation level by adding water or sand to the inside of the precast reinforced concrete enclosure structure for an offshore structure, and FIG. 5l is a precast reinforced concrete enclosure for a floating offshore structure of the present invention It is a diagram showing the state of connecting and fixing the structure to the anchor or anchor block 100 of the lower surface with the anchor chain 90 .

A method of constructing a precast reinforced concrete enclosure structure for a floating offshore structure according to an example of the present invention comprises the steps of: creating a production site around the water part; installing the rail 70 on the floor surface of the production site from the land part to the water part; manufacturing the lower housing 10, the intermediate housing 20 and the upper housing 30 on the rail 70, and vertically combining them with the PS steel material 40; coupling the steel tower 80 to the upper side of the upper housing 30; binding the anchor chain 90 to the anchor connector provided on the bottom plate of the lower housing 10; The step of sliding the precast reinforced concrete enclosure structure for the floating offshore structure from the upper side of the rail (70) to launch into the water unit; injecting a certain amount of water into the precast reinforced concrete housing structure for the floating offshore structure and then pulling it to the installation location; adding water or sand into the precast reinforced concrete enclosure structure for the floating offshore structure and adjusting it to go down to the final installation level; It may include; connecting and fixing the anchor chain 90 to the anchor or anchor block 100 of the lower surface.

Configurations of the present construction method may refer to the above description. In addition, when overlapping with the above description, it may be omitted.

It is preferable to make the production site composition around the water part where the precast reinforced concrete structure for floating offshore structures will be installed.

When the production site is established, the rail 70 is installed on the floor surface of the production site from the land part to the water part. The rail 70 is preferably laid up to a part of the water so that the enclosure structure can be launched to the water surface.

After the installation of the rail 70 is completed or partially completed, the lower housing 10, the intermediate housing 20, and the upper housing 30 are manufactured on the upper part of the rail 70 and integrated vertically with the PS steel material 40 combine When the upper housing 30 and the intermediate housing 20 are made of segments divided into a plurality of segments, the segments divided into a plurality are first combined in the circumferential direction and then laminated and combined.

After the lower housing 10, the intermediate housing 20 and the upper housing 30 are integrally coupled up and down, the steel tower 80 is coupled to the upper side of the upper housing 30. The steel tower 80 may combine only the lower part first and launch it on the water, and then combine the rest on the water.

An anchor chain (90) is bound to the anchor connector provided on the bottom plate of the lower enclosure (10) before launching into the water receiver.

Thereafter, the precast reinforced concrete enclosure for floating offshore structures is slid from the upper side of the rail 70 and launched into the water part.

When launched on the water, a certain amount of water is injected into the precast reinforced concrete housing for floating offshore structures, and then towed using a boat or the like to the installation location.

Thereafter, water or sand is added to the inside of the precast reinforced concrete housing for the floating offshore structure and adjusted to go down to the final installation level.

Finally, the work is completed by connecting and fixing the anchor chain 90 to the anchor or anchor block 100 of the lower surface.

The above-described lower housing 10 may be manufactured from the upper side of the rail 70 . That is, the sliding system 120 is installed on the upper side of the rail 70 , and the lower enclosure 10 may be manufactured from the upper side of the sliding system 120 .

The sliding system 120 includes a sliding pad 122 installed above the rail 70 , a hydraulic jack fixing unit 124 installed above the sliding pad 122 , and an upper side of the hydraulic jack fixing unit 124 . It may include a plurality of hydraulic jacks 126, a sliding hydraulic jack 128 for pulling the hydraulic jack anchor 124.

The cross section of the rail 70 may include a rectangular structure on the lower side and ribs protruding on both sides of the rail 70 . One or more layers of the sliding pad 122 may be installed between the ribs in the longitudinal direction of the rail 70 . The sliding pad 122 may be made of polytetrafluoroethylene (PTFE).

The hydraulic jack anchor 124 may have a U-shape with a concave upper side and be installed long between the ribs in the longitudinal direction of the rail 70 . The hydraulic jack anchor 124 may move between both ribs of the rail 70 to the water surface.

A plurality of hydraulic jacks 126 may be installed on the upper side of the hydraulic jack fixing table 124 in consideration of the degree to which the housing structure can be supported.

The lower housing 10 may be manufactured on the upper side of the hydraulic jacks 126 . However, it is preferable to prevent the hydraulic jack 126 from being moved by being supported by a support structure (not shown) installed on the ground on the lower surface of the lower housing 10 in a state in which the hydraulic jack 126 is lowered during the manufacturing process.

One side of the sliding hydraulic jack 128 may be coupled to the side surface of the hydraulic jack anchor 124, and the other side may be supported by a sawtooth-shaped reaction arm installed on the ground. A portion where the sliding hydraulic jack 128 is coupled to the hydraulic jack mounting base 124 is preferably rotatably coupled. That is, the housing structure can be moved by operating the sliding hydraulic jack 128 to slide the hydraulic jack anchor 124 a certain distance, then contract the sliding hydraulic jack 128 to operate the sliding hydraulic jack 128 again. When the sliding hydraulic jack 128 is contracted after sliding the hydraulic jack mounting base 124 by operating the sliding hydraulic jack 128, the sliding hydraulic jack 128 can be supported by being caught on the front teeth by its own weight. That is, if the sliding hydraulic jack 128 is repeatedly extended and contracted, the housing structure can be moved to the water receiving part.

A power pack may be provided to operate the hydraulic jack 126 or the sliding hydraulic jack 128 . That is, after operating the hydraulic jack 126 using the power pack to raise the housing structure from the support structure, the sliding hydraulic jack 128 may be operated to move it to the water receiving unit. In the inclined part near the water part, it is possible to slowly launch the ship to the water part by installing a wire that tensions the structure toward the land part.

In the above, even though it has been described that all components constituting the embodiment of the present invention operate by being combined or combined into one, the present invention is not necessarily limited to this embodiment. That is, within the scope of the present invention, all the components may be configured or operated by selectively combining one or more components. In addition, terms such as "include", "compose" or "have" described above mean that the corresponding component may be inherent unless otherwise stated, so excluding other components Rather, it should be construed as being able to include other components further. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

10: lower enclosure
20: middle hull
30: upper enclosure
40: PS steel
42: settling block
50: uneven part
52: joint bolt
54: connecting reinforcing bar
56: mortar
60: steel bonding frame
62: perimeter frame
64: connection frame
66: inner frame
68: inclined frame
70: rail
80: steel tower
90: anchor chain
100: anchor block
120: sliding system
122: sliding pad
124: hydraulic jack anchor
126: hydraulic jack
128: sliding hydraulic jack

Claims (10)

A bottom plate including a plurality of anchor connectors penetrating vertically and spaced apart from each other in the circumferential direction, the diameter of which is smaller than that of the bottom plate, is located inside the anchor connector, and is integrally formed with the bottom plate and is provided on the upper side of the bottom plate A lower enclosure, which is a precast reinforced concrete structure including a wall of a circular or polygonal shape;
an intermediate housing having a precast reinforced concrete structure with a circular or polygonal-shaped wall to be installed on the upper side of the lower housing;
Containing; including;
The lower housing, the intermediate housing and the upper housing are integrally coupled up and down by PS steel,
An anchor fixture fixed to the anchor connector of the bottom plate, an anchor chain connected to the anchor fixture, and an anchor or anchor block coupled to the lower side of the anchor chain,
The upper enclosure has a shape that becomes narrower toward the upper part, and a plurality of bolts capable of coupling the steel tower installed on the upper side thereof are installed to be spaced apart from each other in the circumferential direction,
Free for floating offshore structures, characterized in that a plurality of PS steel fixing blocks for integrally combining the lower housing, the intermediate housing and the upper housing vertically are formed protruding along the outer circumferential surface on the upper part of the upper housing and the lower part of the lower housing Cast reinforced concrete enclosure structure. The method according to claim 1,
The intermediate and upper enclosures are composed of segments divided into a plurality in the circumferential direction, and the segments divided into a plurality of segments in the circumferential direction are circumferentially coupled to each other by PS steel. Cast reinforced concrete enclosure structure. 3. The method according to claim 2,
The lower housing, the intermediate housing and the upper housing are interposed between the plurality of segments of the intermediate housing and/or the plurality of segments of the upper housing are interposed between the plurality of segments of the upper housing by the concavo-convex portion formed on the joint surface. Precast reinforced concrete enclosure structure for floating offshore structures, characterized in that. 3. The method according to claim 2,
The lower, intermediate and upper enclosures are coupled to each other by a joint bolt, and/or between the plurality of segments of the middle box and/or between the plurality of segments of the upper enclosure. Precast reinforced concrete enclosure structure for floating offshore structures. 3. The method according to claim 2,
The lower enclosure, the middle enclosure and the upper enclosure are mutually coupled to each other by a connecting reinforcing bar and a mortar between the segments divided into a plurality of the middle enclosure and/or between the plurality of segments of the upper enclosure Precast reinforced concrete enclosure structure for floating offshore structures. delete A plurality of precast reinforced concrete enclosure structures for floating offshore structures according to any one of claims 1 to 5 are installed to be spaced apart from each other, and the plurality of precast reinforced concrete enclosure structures for floating offshore structures installed to be spaced apart from each other are mutually coupled steel materials Precast reinforced concrete enclosure structure for floating offshore structures further comprising a coupling frame. Precast for floating offshore structures, characterized in that the precast for floating offshore structures according to any one of claims 1 to 5, further comprising a hole formed in the reinforced concrete housing structure, submerged in water after the end of its useful life and recycled as a reef Reinforced concrete enclosure structure. In the construction method of the precast reinforced concrete enclosure structure for a floating offshore structure according to any one of claims 1 to 5,
Creating a production site around the awarding part;
Installing a rail on the floor surface of the production site from the land part to the water part;
manufacturing the lower housing, the intermediate housing and the upper housing on the rail and vertically combining them with the PS steel material;
coupling the steel tower to the upper side of the upper enclosure;
binding an anchor chain to an anchor connector provided on the bottom plate of the lower enclosure;
launching the precast reinforced concrete enclosure for the floating offshore structure from the upper side of the rail to the water surface;
injecting a certain amount of water into the precast reinforced concrete enclosure for the floating offshore structure and then pulling it to the installation location;
adding water or sand to the inside of the precast reinforced concrete enclosure for the floating offshore structure and adjusting it to go down to the final installation level;
A method of constructing a precast reinforced concrete enclosure structure for floating offshore structures, comprising the step of connecting and fixing the anchor chain to an anchor or anchor block of the lower surface. 10. The method of claim 9,
The step of launching to the water part by sliding from the upper side of the rail is performed by a sliding system,
The sliding system includes a sliding pad installed on the upper side of the rail, a hydraulic jack fixing unit installed above the sliding pad, a plurality of hydraulic jacks installed above the hydraulic jack fixing unit, and a sliding hydraulic jack for pulling the hydraulic jack fixing unit. Construction method of precast reinforced concrete enclosure structure for floating offshore structures, characterized by its features.

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