CN110055995B - Offshore power generator foundation structure and construction method thereof - Google Patents
Offshore power generator foundation structure and construction method thereof Download PDFInfo
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- CN110055995B CN110055995B CN201910423453.8A CN201910423453A CN110055995B CN 110055995 B CN110055995 B CN 110055995B CN 201910423453 A CN201910423453 A CN 201910423453A CN 110055995 B CN110055995 B CN 110055995B
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- 238000010276 construction Methods 0.000 title claims abstract description 29
- 239000002131 composite material Substances 0.000 claims abstract description 72
- 238000007789 sealing Methods 0.000 claims abstract description 43
- 230000008093 supporting effect Effects 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 39
- 239000010959 steel Substances 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000007667 floating Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 3
- 239000013535 sea water Substances 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/30—Wind power
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
Abstract
The invention provides an offshore power generator foundation structure and a construction method thereof, which are used for solving the problems that the single-column foundation structure used by an offshore power generator in the prior art is difficult to construct, high in cost and long in time and is not suitable for a shallow coverage foundation. Comprising the following steps: a composite cylinder with an opening at the bottom and a sealing cover plate at the top, wherein the sealing cover plate is provided with a plurality of main beams and a plurality of rings of supporting rings, and each supporting ring is formed by connecting a plurality of end parts with secondary beams fixed by the main beams; the single column is provided with a plurality of through holes in the circumferential direction, the bottom ends of the single columns are arranged in the composite cylinder and are coaxial, the bottom surfaces of the single columns and the composite cylinder are flush, and each main beam is arranged in one through hole in a penetrating way; and a connecting piece for fixing the single column and the composite cylinder. The invention improves the stability of the basic structure of the offshore power generator during sinking; the foundation structure is built on land, then the foundation structure is pumped and vacuumized to sink to the seabed, pile driving and rock embedding are not needed on the seabed, and the construction difficulty and time are reduced. In addition, the foundation structure can also be applied to shallow coverage foundations.
Description
Technical Field
The invention relates to the technical field of foundation design of offshore wind generating sets, in particular to an offshore generator foundation structure and a construction method thereof.
Background
Wind energy has been attracting attention worldwide as the most valuable renewable energy source. The offshore wind farm has the advantages of high wind speed, long effective power generation time, no land occupation, close distance from the load center and the like, and is widely paid attention to by people. The wind energy source is quite rich in the coastline, so that the wind energy is quite a feasible technical scheme in China.
One possible way to harness wind energy is to build an offshore generator, which must be supported on an offshore generator infrastructure to achieve its performance. Most offshore generator infrastructures worldwide today employ single column infrastructures. The single column foundation structure is a mode that a steel pipe pile with the diameter of about 4-6 meters is sunk into the sea floor and is arranged at a place 30-60 m below the sea floor. Conventional single column foundations are typically submerged into the seabed layer using a piling hammer. However, large-area shallow coverage foundations exist in coasts such as Liaoning, shandong, zhejiang, fujian, guangdong, guangxi and the like in China, and because the depth of the buried bedrock surface is shallow, the steel pipe piles cannot be sunk to the required design depth for a single-column foundation structure.
In summary, the single-column foundation structure used by the offshore power generator in the prior art has the disadvantages of high construction difficulty, high cost and long time, and is not suitable for shallow coverage foundations.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide an offshore power generator foundation structure, which is used for solving the problems of the prior art that the construction of a single-column foundation structure is difficult, the cost is high, the time is long, and the foundation structure is not suitable for shallow coverage.
The invention provides an offshore power generator foundation structure comprising: the top of the composite cylinder is provided with a sealing cover plate, and the bottom of the composite cylinder is provided with an opening; the sealing cover plate is provided with a plurality of main beams extending in the radial direction and a plurality of supporting rings distributed in the radial direction, each supporting ring is formed by connecting a plurality of secondary beams, and the end parts of the secondary beams are fixedly connected with the main beams; a steel tubular single column, wherein a plurality of through holes are formed in the circumferential direction of the single column; the bottom end of the single column is arranged in the composite cylinder, the single column and the composite cylinder are coaxial, the bottom end face of the single column is flush with the bottom end face of the composite cylinder, and each main beam is arranged in a penetrating hole in a penetrating way; and the connecting piece is used for fixedly connecting the single column with the composite cylinder.
Optionally, the connecting piece is composed of an annular boss and a plurality of trapezoid steel plates;
the inner circular surface of the circular boss is connected with the single column; all trapezoid steel plates are arranged between the annular boss and the sealing cover plate;
One end of each trapezoid steel plate is connected with the annular boss, the other end of each trapezoid steel plate is connected with the sealing cover plate, and one side face of each trapezoid steel plate is connected with the corresponding single column.
Optionally, a flange plate is further arranged on the other side face of each trapezoid steel plate.
Optionally, each trapezoid steel plate is provided with a water passing hole.
Optionally, concrete is poured between two adjacent support rings.
Optionally, a plurality of radially extending sub-deck plates are circumferentially arranged in the space between the composite cylinder and the single column, and a plurality of stiffening ribs are uniformly arranged on the surface of each sub-deck plate along the radial direction.
Optionally, stiffening ribs are arranged on the inner surface of the composite cylinder.
The invention also provides a construction method of the basic structure of the offshore power generator, which comprises the following steps:
1) A prefabricated onshore monolith, said monolith being an offshore power generator foundation according to claim 1;
2) Floating the integral piece to a construction site;
3) And carrying out dead weight sinking and negative pressure sinking on the integral piece until the integral piece is sunk to a designated elevation.
Optionally, the specific manufacturing process of the integral piece in the step 1) is as follows:
A. The preparation of the composite cylinder comprises the following specific preparation processes: the device comprises a barrel body, a sealing cover plate and a plurality of support rings, wherein the sealing cover plate is sealed and fixed at one end of the barrel body, a plurality of main beams and a plurality of secondary beams forming each support ring are welded on the sealing cover plate, and a via hole for a single pile to pass through is reserved in the sealing cover plate;
B. The single column is divided into three sections, a first section of the single column is hung into a through hole formed in the sealing cover plate, and the first section of the single column is fixed with the composite cylinder; directly welding the second section of the single column on the first section of the single column, and enabling the main beam to pass through the through hole in the single column; the top surface of the sealing cover plate is fixedly connected with the second section of the single column and the composite cylinder through a connecting piece; and welding the third section of the single column with the second section of the single column.
Optionally, in the step a, a plurality of radially extending sub-deck plates are circumferentially arranged in the cylinder body, and all sub-deck plates enclose a long hole for accommodating the single column; in the step B, the first section of the single column is positioned in the long hole, and the first section of the single column is welded and fixed with all the sub-deck plates.
As described above, the offshore power generator foundation structure and the construction method thereof according to the present invention have the following beneficial effects:
The offshore power generator foundation structure is formed by combining the single column and the composite cylinder, and the main beam and the secondary beam are arranged on the sealing cover plate at the joint of the single column and the composite cylinder, so that the offshore power generator foundation structure has a supporting effect, and the strength and the rigidity of the composite cylinder are greatly improved; in addition, a connecting piece is arranged at the joint of the single column and the composite cylinder and used for reinforcing the single column and the composite cylinder. The above design improves the stability of the offshore generator foundation structure during sinking; the offshore generator foundation structure is built on land, then the offshore generator foundation structure is pumped and vacuumized to sink to the seabed, and pile driving and rock embedding are not needed on the seabed, so that the construction difficulty and the construction time are reduced. In addition, the offshore power generator foundation structure designed by the invention can be applied to shallow coverage foundations. In summary, the offshore power generator foundation structure designed by the invention solves the problems of high construction difficulty, high cost, long construction time and inapplicability to shallow coverage foundation of a single-column foundation structure.
Drawings
FIG. 1 is a schematic diagram of an offshore power generator infrastructure provided by the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1 in accordance with the present invention;
fig. 3 is a cross-sectional view of the B-B of fig. 1 in accordance with the present invention.
Description of element reference numerals
1. Composite cylinder
10. Sealing cover plate
11. Main girder
12. Support ring
13. Secondary beam
14. Concrete
15. Dividing plate
16. Rib
17. Cabin
18. Barrel body
19. Via hole
2. Single column
20. Through hole
3. Connecting piece
30. Annular boss
31. Trapezoidal steel plate
32. Flange plate
33. Water passing hole
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to be limiting.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more. For convenience of description, in this specification, the axial direction of the single column 2 and the composite cylinder 1 is taken as the up-down direction, and the end of the composite cylinder 1 that cooperates with the single column 2 is called the bottom end, and the opposite end is called the top end.
As shown in fig. 1, the present invention provides an offshore power generator infrastructure comprising:
the composite cylinder 1, the top of the composite cylinder 1 is provided with a sealing cover plate 10, and the bottom of the composite cylinder 1 is provided with an opening; the sealing cover plate 10 is provided with a plurality of main beams 11 extending in the radial direction and a plurality of supporting rings 12 distributed in the radial direction, each supporting ring 12 is formed by connecting a plurality of secondary beams 13, and the end parts of the secondary beams 13 are fixedly connected with the main beams 11;
A steel tubular single column 2, wherein a plurality of through holes 20 are formed in the circumferential direction of the single column 2; the bottom end of the single column 2 is arranged in the composite cylinder 1, the single column 2 and the composite cylinder 1 are coaxial, the bottom end face of the single column 2 is flush with the bottom end face of the composite cylinder 1, and each main beam 11 is arranged in a through hole 20 in a penetrating way;
And the connecting piece 3 fixedly connects the single column 2 with the composite cylinder 1.
The offshore power generator foundation structure is formed by combining the single column 2 and the composite cylinder 1, and the main beam 11 and the secondary beam 13 are arranged on the sealing cover plate 10 at the joint of the single column 2 and the composite cylinder 1, so that the offshore power generator foundation structure has a supporting function, and the strength and the rigidity of the composite cylinder 1 are greatly improved; in addition, a connecting piece 3 is arranged at the joint of the single column 2 and the composite cylinder 1 and used for reinforcing the single column 2 and the composite cylinder 1. The above design improves the stability of the offshore generator foundation structure during sinking; the offshore generator foundation structure is built on land, then the offshore generator foundation structure is pumped and vacuumized to sink to the seabed, and pile driving and rock embedding are not needed on the seabed, so that the construction difficulty and the construction time are reduced. In addition, the offshore power generator foundation structure designed by the invention can be applied to shallow coverage foundations. In summary, the offshore power generator foundation structure designed by the invention solves the problems of high construction difficulty, high cost, long construction time and inapplicability to shallow coverage foundation of a single-column foundation structure.
Wherein, the main beam 11 of the foundation structure extends from the central position of the sealing cover plate 10 to the inner wall of the composite cylinder 1; in practice, the single column 2 is a circular steel tube, and the composite cylinder 1 is a circular thin-wall steel cylinder; the primary beams 11 and the secondary beams 13 are steel i-beams.
As shown in fig. 1, the connecting member 3 in the present embodiment is composed of an annular boss 30 and a plurality of trapezoidal steel plates 31; the inner circular surface of the circular boss 30 is connected with the single column 2; all trapezoid steel plates 31 are arranged between the annular boss 30 and the sealing cover plate 10; one end of each trapezoid steel plate 31 is connected with the annular boss 30, the other end of each trapezoid steel plate is connected with the sealing cover plate 10, and one side surface of each trapezoid steel plate 31 is connected with the single column 2.
In practice, the annular boss 30 is arranged on the outer side of the single column 2, a certain gap exists between the annular boss 30 and the sealing cover plate 10 of the composite cylinder 1, a plurality of trapezoid steel plates 31 are arranged at the gap between the annular boss 30 and the sealing cover plate 10, one end of each trapezoid steel plate 31 is connected with the annular boss 30, and the other end of each trapezoid steel plate 31 is arranged on the sealing cover plate 10, and one side face of each trapezoid steel plate is connected with the single column 2. Thus, three sides of the trapezoid steel plate 31 are fixed, the single column 2 and the composite cylinder 1 are connected, the stability between the composite cylinder 1 and the single column 2 can be further improved, and the problem of the integral piece in the construction process is prevented.
Specifically, the top outer edge of the trapezoidal steel plate 31 is flush with the outer edge of the annular boss 30, and the bottom outer edge of the trapezoidal steel plate 31 is flush with the outer edge of the sealing cover plate 10.
Optionally, as shown in fig. 1, the other side surface of each trapezoidal steel plate 31 is further provided with a flange plate 32. The other side of the trapezoidal steel plate 31 is provided with a flange plate 32 for enhancing the stability of the basic structure of the offshore power generator.
Alternatively, as shown in fig. 1, each of the trapezoidal steel plates 31 is provided with a water passing hole 33. Because the offshore power generator foundation structure needs to be placed on the sea bottom, seawater can pass through the offshore power generator foundation structure, and the water passing holes 33 are formed in the trapezoid steel plates 31, so that the seawater can pass through the offshore power generator foundation structure conveniently and sink to a set elevation; in addition, after the offshore power generator foundation structure of the embodiment is fixed, the water passing holes 33 are arranged so that when seawater impacts the offshore power generator foundation structure, the seawater flows through the water passing holes 33, the resistance of the seawater to the offshore power generator foundation structure is reduced, and the stability of the offshore power generator foundation structure is enhanced.
As shown in fig. 2, a plurality of radially extending dividing plates 15 are circumferentially arranged in the space between the composite cylinder 1 and the single column 2, and a plurality of stiffening ribs 16 are uniformly arranged on the surface of each dividing plate 15 along the radial direction; one side of the dividing plate 15 is connected with the single column 2, and the other side is connected with the inner wall of the composite cylinder 1. Due to the existence of the dividing plate 15, the inside of the composite cylinder 1 is divided into a plurality of cabins 17, one side of the dividing plate 15 is connected with the single column 2, and the other side of the dividing plate is connected with the inner wall of the composite cylinder 1, so that the stability of the composite cylinder 1 is enhanced, and the composite cylinder 1 is not deformed due to the impact of seawater in the seawater. Meanwhile, each of the sub-deck 15 is provided with a plurality of stiffening ribs 16, and the stiffening ribs 16 strengthen the toughness of the sub-deck 15, so that the sub-deck 15 is not easy to deform and plays a role in more effectively supporting the composite cylinder 1.
As shown in fig. 2, the inner surface of the composite cylinder 1 is also provided with stiffening ribs 16, and a plurality of stiffening ribs 16 can be arranged at equal intervals along the circumferential direction of the inner wall of the composite cylinder 1; the stiffening ribs 16 mainly serve to strengthen the toughness and the stability and the compression resistance of the composite cylinder 1.
As shown in fig. 3, which is a cross-sectional view B-B of fig. 1, it can be seen that a plurality of main beams 11 and a plurality of sub beams 13 at the top of the composite drum 1 are provided on the sealing cover plate 10. The sealing cover plate 10 is positioned at the connecting position of the single column 2 and the composite cylinder 1, and is arranged for the stability of the single column 2 and the composite cylinder 1, and the main beam 11 and the secondary beam 13 are additionally arranged on the sealing cover plate 10, so that the stability of the single column 2 and the composite cylinder 1 is further enhanced.
As shown in fig. 3, concrete 14 is further poured between two adjacent support rings 12. The thickness of the concrete 14 is the same as that of the sub-beams 13 described above. The concrete 14 is an artificial stone material prepared from a cementing material, granular aggregate, water, and optionally additives and admixtures in a certain proportion by uniformly stirring, compacting, shaping, curing and hardening. The concrete 14 has the characteristics of high compressive strength, good durability and wide strength grade range. The concrete 14 is poured between two adjacent support rings 12 for the stability of the whole member, and is not easy to deform during construction and working.
The invention also provides a construction method of the basic structure of the offshore power generator, which comprises the following steps: 1) Firstly, manufacturing the basic structure of the offshore power generator on land to form an integral piece; 2) Floating the assembled integral piece to a construction site; 3) And carrying out dead weight sinking and negative pressure sinking on the integral piece until the integral piece is sunk to a designated elevation.
Aiming at the basic structure of the offshore power generator, the specific construction process of the embodiment is as follows: A. the manufacturing process of the composite cylinder 1 comprises the following steps: the composite cylinder 1 comprises a cylinder body 18, a sealing cover plate 10 is fixed at one end of the cylinder body 18 in a sealing manner, a plurality of main beams 11 and a plurality of secondary beams 13 forming each supporting ring 12 are welded on the sealing cover plate 10, and a through hole 19 for a single pile 2 to pass through is reserved in the sealing cover plate 10;
B. The single column 2 is divided into three sections, a first section of the single column 2 is hung into a through hole 19 arranged on the sealing cover plate 10, and the first section of the single column 2 is fixed with the composite cylinder 1; directly welding the second section of the single column 2 to the first section of the single column 2, wherein the main beam 11 passes through the through hole 20 on the single column 2; the top surface of the sealing cover plate 10 is fixedly connected with the second section of the single column 2 and the composite cylinder 1 through a connecting piece 3; and welding the third section of the single column 2 with the second section of the single column 2.
In the step a, a plurality of radially extending dividing plates 15 are circumferentially arranged in the cylinder body 18, and all dividing plates 15 enclose long holes for accommodating the single columns 2; in the step B, the first section of the single column 2 is located in the long hole, and the first section of the single column 2 is welded and fixed with all the nacelle plates 15.
In conclusion, the whole basic structure of the offshore power generator adopts a structure with thin upper part and thick lower part, which is beneficial to reducing wave and ocean current actions, lowering the height of the gravity center and ensuring the whole stability of the basic structure of the offshore power generator; in addition, the foundation structure of the offshore power generator is convenient to install and dismantle, the offshore construction workload is greatly reduced, the construction period is saved, the construction efficiency is improved, the construction cost is reduced, and the offshore power generator has good economical efficiency.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (8)
1. An offshore power generator foundation structure comprising:
The device comprises a composite cylinder (1), wherein a sealing cover plate (10) is arranged at the top of the composite cylinder (1), and the bottom of the composite cylinder (1) is provided with an opening; the sealing cover plate (10) is provided with a plurality of main beams (11) extending in the radial direction and a plurality of supporting rings (12) distributed in the radial direction, each supporting ring (12) is formed by connecting a plurality of secondary beams (13), and the end parts of the secondary beams (13) are fixedly connected with the main beams (11);
A plurality of through holes (20) are formed in the circumferential direction of the steel tubular single column (2), and each main beam (11) is arranged in one through hole (20) in a penetrating mode; the bottom end of the single column (2) is arranged in the composite cylinder (1) and the single column (2) and the composite cylinder (1) are coaxial, and the bottom end face of the single column (2) is flush with the bottom end face of the composite cylinder (1); a plurality of radially extending dividing plates (15) are circumferentially arranged in the space between the single column (2) and the composite cylinder (1), one side of each dividing plate (15) is connected with the single column (2), and the other side of each dividing plate is connected with the inner wall of the composite cylinder (1);
the connecting piece (3) is used for fixedly connecting the single column (2) with the composite cylinder (1); the connecting piece (3) consists of an annular boss (30) and a plurality of trapezoid steel plates (31), the inner circular surface of the annular boss (30) is connected with the single column (2), and all trapezoid steel plates (31) are arranged between the annular boss (30) and the sealing cover plate (10); one end of each trapezoid steel plate (31) is connected with the annular boss (30), the other end of each trapezoid steel plate is connected with the sealing cover plate (10), and one side surface of each trapezoid steel plate (31) is connected with the single column (2);
the specific manufacturing process of the basic structure of the offshore power generator is as follows:
A. The manufacturing process of the composite cylinder (1) comprises the following steps: the composite cylinder (1) comprises a cylinder body (18), a sealing cover plate (10) is fixed at one end of the cylinder body (18) in a sealing way, a plurality of main beams (11) and a plurality of secondary beams (13) forming each circle of supporting rings (12) are welded on the sealing cover plate (10), and a through hole (19) for a single column (2) to pass through is reserved in the sealing cover plate (10);
B. The single column (2) is divided into three sections, a first section of the single column (2) is suspended into a through hole (19) arranged on the sealing cover plate (10), and the first section of the single column (2) is fixed with the composite cylinder (1); directly welding the second section of the single column (2) on the first section of the single column (2), wherein the main beam (11) passes through a through hole (20) on the single column (2); the top surface of the sealing cover plate (10) is fixedly connected with the second section of the single column (2) and the composite cylinder (1) through a connecting piece (3); welding a third section of the single column (2) with a second section of the single column (2).
2. Offshore power generator foundation structure according to claim 1, wherein the other side of each of said trapezoidal steel plates (31) is further provided with a flange plate (32).
3. Offshore power generator foundation structure according to claim 1, wherein each of said trapezoidal steel plates (31) is provided with water holes (33).
4. Offshore power generator foundation structure according to claim 1, characterized in that between two adjacent support rings (12) there is also poured concrete (14).
5. Offshore power generator foundation structure according to claim 1, wherein a plurality of stiffening ribs (16) are evenly arranged radially on the surface of each of said nacelle plates (15).
6. Offshore power generator foundation structure according to claim 1, characterized in that the inner surface of the composite drum (1) is provided with stiffening ribs (16).
7. The construction method of the basic structure of the offshore power generator is characterized by comprising the following steps of:
1) A prefabricated onshore monolith being an offshore generator foundation according to claim 1;
2) Floating the integral piece to a construction site;
3) And carrying out dead weight sinking and negative pressure sinking on the integral piece until the integral piece is sunk to a designated elevation.
8. The method of constructing a marine generator foundation structure according to claim 7, wherein in step a, a plurality of radially extending sub-deck plates (15) are circumferentially arranged in the tubular body (18), and all sub-deck plates (15) enclose a long hole for accommodating the single column (2);
In the step B, the first section of the single column (2) is positioned in the long hole, and the first section of the single column (2) is welded and fixed with all the sub-deck plates (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910423453.8A CN110055995B (en) | 2019-05-21 | 2019-05-21 | Offshore power generator foundation structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910423453.8A CN110055995B (en) | 2019-05-21 | 2019-05-21 | Offshore power generator foundation structure and construction method thereof |
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| CN110055995A CN110055995A (en) | 2019-07-26 |
| CN110055995B true CN110055995B (en) | 2024-07-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110607802B (en) * | 2019-08-22 | 2024-07-30 | 上海勘测设计研究院有限公司 | Connection tool for single column and composite tube combined foundation |
| CN111779020A (en) * | 2020-06-28 | 2020-10-16 | 中国电建集团华东勘测设计研究院有限公司 | Novel all-steel cylindrical foundation structure for offshore wind power |
| CN112127383A (en) * | 2020-09-30 | 2020-12-25 | 长江勘测规划设计研究有限责任公司 | Offshore wind power foundation with separated bins in barrel top dense beam barrel and single-column negative pressure barrel |
| CN112127381A (en) * | 2020-09-30 | 2020-12-25 | 长江勘测规划设计研究有限责任公司 | Offshore wind power foundation with separated bins in barrel top dense beam barrel and single-column variable-section negative pressure barrel and construction method |
| CN112523216A (en) * | 2020-12-22 | 2021-03-19 | 上海渊丰地下工程技术有限公司 | High-efficient no disturbance shaped steel tubular pile plug construction system |
| CN114000495B (en) * | 2021-11-22 | 2023-01-13 | 中交第一航务工程局有限公司 | Underwater vacuum preloading process |
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