CN108442399B - Light anti-seismic jacket foundation adopting complete joint pipe nodes - Google Patents
Light anti-seismic jacket foundation adopting complete joint pipe nodes Download PDFInfo
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- CN108442399B CN108442399B CN201810236556.9A CN201810236556A CN108442399B CN 108442399 B CN108442399 B CN 108442399B CN 201810236556 A CN201810236556 A CN 201810236556A CN 108442399 B CN108442399 B CN 108442399B
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- 230000005540 biological transmission Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract description 2
- 230000008719 thickening Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002929 anti-fatigue Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding 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
- E02D27/34—Foundations for sinking or earthquake territories
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- Engineering & Computer Science (AREA)
- Structural Engineering (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)
- Environmental & Geological Engineering (AREA)
- Revetment (AREA)
- Foundations (AREA)
Abstract
A light anti-seismic jacket foundation adopting complete joint pipe joints belongs to the technical field of ocean engineering. The light anti-seismic jacket foundation adopts a complete joint pipe joint, adjacent jacket legs are connected by a first horizontal support, a second horizontal support and a main diagonal support, the upper and lower adjacent main diagonal supports on the same side are connected by auxiliary diagonal supports, and the middle parts of the adjacent second horizontal supports on the mud surface are connected by a fifth horizontal support. The light anti-seismic jacket foundation improves the transmission mechanism of load in the structure, can effectively lighten the load in jacket legs through the cooperation of the main diagonal bracing and the auxiliary diagonal bracing, improves the ultimate bearing capacity of the jacket, reduces the thickening thickness of the node jacket legs, saves materials and reduces cost; the deformation of the main diagonal bracing pipe wall of the lap joint part releases most of external energy, and the shock resistance and fatigue resistance of the jacket can be improved to the greatest extent by adjusting the wall thickness ratio, the diameter ratio, the radius wall thickness ratio and the lap joint length of the jacket legs, the main diagonal bracing and the auxiliary diagonal bracing.
Description
Technical Field
The invention relates to a light anti-seismic jacket foundation adopting a complete joint pipe node, and belongs to the technical field of ocean engineering.
Background
In recent years, wind energy becomes one of important energy sources for alleviating global environmental problems and energy problems because of the characteristics of cleanliness and reproducibility, the ocean area is wide, the sea wind resources are stable, the power generation is high, and the offshore wind power is rapidly developed all over the world. At present, the offshore wind turbine foundations are generally single pile foundations, multi-pile foundations, cylindrical foundations, floating foundations and jacket foundations, and the offshore wind turbine foundations with water depths of 30m to 70m are generally jacket foundations. The traditional jacket foundation mostly adopts X-type or K-type pipe nodes, has mature technology, stable structure and strong anti-capsizing capability, and is suitable for various submarine geological conditions. However, diagonal braces and horizontal braces are welded on jacket legs, the number of welding seams is more concentrated, the jacket legs at the joints must be thickened to ensure structural strength, the process difficulty is increased, the manufacturing period is prolonged, the production cost is increased, and under severe marine environments and complex working conditions, in an earthquake active region, the fatigue resistance and the shock resistance of the traditional jacket foundation are limited, so that the structural safety problem faces serious challenges.
Disclosure of Invention
In order to overcome the defects of the traditional jacket foundation, the invention provides the light anti-seismic jacket foundation adopting the fully-spliced pipe nodes, and the light anti-seismic jacket foundation has the characteristics of simple and stable structure, high strength, light weight, short manufacturing period, good anti-seismic performance, good anti-fatigue performance and the like.
The technical scheme adopted by the invention is as follows: a light anti-seismic jacket foundation adopting a complete joint pipe node comprises jacket legs, main diagonal braces, auxiliary diagonal braces, first horizontal braces, second horizontal braces, third horizontal braces, fourth horizontal braces and fifth horizontal braces, wherein the jacket legs of the light anti-seismic jacket foundation adopt inwards inclined vertical rods, two adjacent jacket legs are fixedly connected through a plurality of main diagonal braces, one layer of the light anti-seismic jacket foundation is horizontally and fixedly connected with the jacket legs through the second horizontal braces, the inner sides of middle points of the two adjacent first horizontal braces are fixedly connected through the fifth horizontal braces, and the two layers and the top layer are horizontally and fixedly connected with the jacket legs through the second horizontal braces; an auxiliary diagonal brace is fixedly connected between two adjacent main diagonal braces, one end of the auxiliary diagonal brace is connected to the lower end of one main diagonal brace, and the other end of the auxiliary diagonal brace is connected to the upper end of the other main diagonal brace; between the first layer and the second layer of light-duty antidetonation jacket basis, every side adopts two first bracing to constitute the V font, and the lower extreme fixed connection of V word is in the intermediate position of the first horizontal support of one deck, and the upper end fixed connection of V word is at the jacket leg of two layers second horizontal support below.
The number of the jacket legs is three, and a three-leg light anti-seismic jacket foundation is formed.
The number of the jacket legs is four, and a four-leg light anti-seismic jacket foundation is formed.
The four-leg light anti-seismic jacket foundation is from two layers to the top layer, each layer between two opposite jacket legs is fixedly connected by a third horizontal support, one ends of the other two opposite jacket legs, which are respectively and fixedly connected with jacket legs, are respectively and fixedly connected with the other ends of the two fourth horizontal supports at the middle position of the third horizontal support.
The beneficial effects of the invention are as follows: the three-leg jacket foundation and the four-leg jacket foundation both belong to light anti-seismic jacket foundations, all adopt complete pipe joint nodes, and are different in pipe joint modes, so that the difference between the structure and the traditional jacket structure is that not all horizontal supports are directly welded on jacket legs, but the horizontal supports partially welded on adjacent jacket legs are changed into auxiliary diagonal supports with two ends welded on upper and lower adjacent main diagonal supports, and the inclination degree of the auxiliary diagonal supports is determined according to the lap joint length requirement of the complete pipe joint nodes. The optimization of the connection mode and the structure integrally changes the transmission mechanism of external load in the jacket structure, so that the transverse external load is mainly transmitted between the main diagonal bracing and the auxiliary diagonal bracing, but hardly passes through jacket legs, and the main diagonal bracing and the auxiliary diagonal bracing can share part of vertical load, so that the pressure of the jacket legs is reduced, the main components of the jacket structure are protected, the ultimate bearing capacity of the structure is improved, the increase of the wall thickness of the jacket legs at the pipe nodes can be effectively reduced, the material is saved, the structural dead weight is reduced, the process is simplified, the production period is shortened, and the cost is reduced. In addition, a large amount of external energy is absorbed and released through the deformation of the pipe wall of the main diagonal bracing at the lap joint position, so that the anti-seismic performance and the anti-fatigue performance of the structure can be remarkably improved, and the anti-seismic performance and the fatigue performance of the structure can be optimized by adjusting the wall thickness ratio, the diameter ratio, the radius wall thickness ratio and the lap joint length of the jacket leg, the main diagonal bracing and the auxiliary diagonal bracing which form the joint of the complete lap joint pipe.
Drawings
Fig. 1 is a block diagram of a three-legged lightweight anti-seismic jacket foundation.
Fig. 2 is a block diagram of a four-legged lightweight anti-seismic jacket foundation.
Fig. 3 is a block diagram of a fully-meshed pipe node.
In the figure: 1. jacket leg, 2, main bracing, 3, vice bracing, 4, first bracing, 5, first horizontal support, 6, second horizontal support, 7, third horizontal support, 8, fourth horizontal support, 9, fifth horizontal support.
Detailed Description
The invention will be described in further detail below with reference to the accompanying drawings.
Fig. 1 shows the structure of a three-legged lightweight anti-seismic jacket foundation. The jacket foundation is divided into 6 layers, the mud surface is a first layer, the layer numbers are sequentially increased from bottom to top, and the top layer is a sixth layer; 3 jacket legs 1 are arranged at an angle of 120 degrees, and the top of each jacket leg is provided with an inclination angle towards the center; adjacent jacket legs are connected by a second horizontal brace 6 at the first layer, and adjacent jacket legs are connected by a first horizontal brace 5 at the second layer and the top layer; two symmetrical V-shaped first diagonal braces 4 are arranged on each side of the adjacent jacket legs between the first layer and the second layer, the upper ends of the first diagonal braces 4 are connected to the height position of the second layer of the jacket legs 1, and the lower ends of the first diagonal braces 4 are connected to the middle position of the second horizontal brace 6; the second layer and the third layer of the adjacent jacket legs are connected by a main diagonal brace 2 respectively, and the third layer and the fourth layer are connected by an auxiliary diagonal brace 3 respectively; in the inner space surrounded by the three jacket legs, the middle positions of two adjacent second horizontal braces 6 at the first layer are connected by a fifth horizontal brace 9. Thus, a three-leg jacket foundation is formed.
Fig. 2 shows the structure of a four-legged lightweight anti-seismic jacket foundation. The jacket foundation is divided into 6 layers, the mud surface is a first layer, the layer numbers are sequentially increased from bottom to top, and the top layer is a sixth layer; the jacket has 4 jacket legs 1 which are arranged at an angle of 90 degrees, and the top of each jacket leg is provided with an inclination angle towards the center; adjacent jacket legs are connected by a second horizontal brace 6 at the first layer, and adjacent jacket legs are connected by a first horizontal brace 5 at the second layer and the top layer; two symmetrical V-shaped first diagonal braces 4 are arranged on each side of the adjacent jacket legs between the first layer and the second layer, the upper ends of the first diagonal braces 4 are connected to the height position of the second layer of the jacket legs, and the lower ends of the first diagonal braces 4 are connected to the middle position of the first horizontal brace 6; the second layer and the third layer of the adjacent jacket legs are connected by a main diagonal brace 2 respectively between the third layer and the fourth layer of each side and between the fourth layer and the fifth layer of each side, and the upper main diagonal brace 2 and the lower main diagonal brace 2 which are adjacent are connected by an auxiliary diagonal brace 3; in the inner space surrounded by four jacket legs, the middle positions of two adjacent second horizontal supports 6 at the first layer are connected by a fifth horizontal support 9, and in the second, third, fourth, fifth and sixth layers, each layer is connected with jacket legs 1 at the opposite positions by a third horizontal support 7, and then two fourth horizontal supports 8 are used for respectively connecting the other two jacket legs with the third horizontal support 7. Thus, a complete four-leg jacket foundation is formed.
Fig. 3 shows the structure of a fully-meshed pipe node. The jacket comprises jacket legs 1, a main diagonal bracing 2 and an auxiliary diagonal bracing 3, wherein the end part of the auxiliary diagonal bracing 3 is completely welded on the main diagonal bracing 2, and a certain overlap joint length is kept between the end part of the auxiliary diagonal bracing 3 and the jacket legs 1, and the two are not directly connected.
Claims (1)
1. The utility model provides an adopt light-duty antidetonation jacket basis of taking over node completely, it includes jacket leg (1), main bracing (2), vice bracing (3), first bracing (4), first horizontal support (5), second horizontal support (6), third horizontal support (7), fourth horizontal support (8), fifth horizontal support (9), characterized by: the jacket legs (1) of the light anti-seismic jacket foundation are provided with inwards inclined vertical rods, a plurality of main diagonal braces (2) are fixedly connected between two adjacent jacket legs (1), one layer of the light anti-seismic jacket foundation is horizontally and fixedly connected with the jacket legs (1) by adopting a second horizontal brace (6), the inner sides of the middle points of the two adjacent second horizontal braces (6) are fixedly connected by using a fifth horizontal brace (9), and the two layers and the top layer are horizontally and fixedly connected with the jacket legs (1) by adopting a first horizontal brace (5); an auxiliary diagonal brace (3) is fixedly connected between two adjacent main diagonal braces (2), one end of the auxiliary diagonal brace (3) is connected to the lower end of one main diagonal brace (2), and the other end of the auxiliary diagonal brace (3) is connected to the upper end of the other main diagonal brace (2); between a first layer and a second layer of a light anti-seismic jacket foundation, each side adopts two first diagonal braces (4) to form a V shape, the lower end of the V shape is fixedly connected to the middle position of a second horizontal brace (6) of the first layer, and the upper end of the V shape is fixedly connected to jacket legs (1) below the first horizontal braces (5) of the second layer; the main diagonal bracing (2) is arranged between the two layers and the top layer of the light anti-seismic jacket foundation;
the number of the jacket legs (1) is four, so that a four-leg light anti-seismic jacket foundation is formed; the four-leg light anti-seismic jacket foundation is from two layers to the top layer, each layer between two opposite jacket legs (1) is fixedly connected with a third horizontal support (7), one ends of two fourth horizontal supports (8) between the other two opposite jacket legs (1) are respectively fixedly connected with the jacket legs (1), and the other ends of the two fourth horizontal supports (8) are fixedly connected with the middle position of the third horizontal support (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810236556.9A CN108442399B (en) | 2018-03-21 | 2018-03-21 | Light anti-seismic jacket foundation adopting complete joint pipe nodes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810236556.9A CN108442399B (en) | 2018-03-21 | 2018-03-21 | Light anti-seismic jacket foundation adopting complete joint pipe nodes |
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| Publication Number | Publication Date |
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| CN108442399A CN108442399A (en) | 2018-08-24 |
| CN108442399B true CN108442399B (en) | 2023-12-01 |
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| CN201810236556.9A Active CN108442399B (en) | 2018-03-21 | 2018-03-21 | Light anti-seismic jacket foundation adopting complete joint pipe nodes |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281307A (en) * | 2018-11-10 | 2019-01-29 | 重庆大学 | A kind of offshore jacket platforms anti-seismic structure new system containing buckling restrained brace |
| CN114875876A (en) * | 2022-06-08 | 2022-08-09 | 中海石油(中国)有限公司 | Jacket assembly method adopting standardized nodes |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2495370A1 (en) * | 2011-03-04 | 2012-09-05 | Leenars, Cees Eugen Jochem | In-line piling method for offshore wind turbine foundation applications |
| CN105019419A (en) * | 2015-06-29 | 2015-11-04 | 中国能源建设集团广东省电力设计研究院有限公司 | Guide pipe frame, guide pipe frame foundation platform and guide pipe frame construction method |
| CN204780837U (en) * | 2015-06-29 | 2015-11-18 | 中国能源建设集团广东省电力设计研究院有限公司 | Jacket and jacket basic platform |
| CN205077474U (en) * | 2015-10-21 | 2016-03-09 | 中国海洋石油总公司 | Structure is alleviated to platform elongated structure's vortex induced vibration |
| CN208395850U (en) * | 2018-03-21 | 2019-01-18 | 大连理工大学 | A kind of light shock-proof jacket basis using overlap joint pipe node completely |
-
2018
- 2018-03-21 CN CN201810236556.9A patent/CN108442399B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2495370A1 (en) * | 2011-03-04 | 2012-09-05 | Leenars, Cees Eugen Jochem | In-line piling method for offshore wind turbine foundation applications |
| CN105019419A (en) * | 2015-06-29 | 2015-11-04 | 中国能源建设集团广东省电力设计研究院有限公司 | Guide pipe frame, guide pipe frame foundation platform and guide pipe frame construction method |
| CN204780837U (en) * | 2015-06-29 | 2015-11-18 | 中国能源建设集团广东省电力设计研究院有限公司 | Jacket and jacket basic platform |
| CN205077474U (en) * | 2015-10-21 | 2016-03-09 | 中国海洋石油总公司 | Structure is alleviated to platform elongated structure's vortex induced vibration |
| CN208395850U (en) * | 2018-03-21 | 2019-01-18 | 大连理工大学 | A kind of light shock-proof jacket basis using overlap joint pipe node completely |
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| CN108442399A (en) | 2018-08-24 |
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