CN108945327B - Suction pile of buoyancy tower platform - Google Patents
Suction pile of buoyancy tower platform Download PDFInfo
- Publication number
- CN108945327B CN108945327B CN201810824089.1A CN201810824089A CN108945327B CN 108945327 B CN108945327 B CN 108945327B CN 201810824089 A CN201810824089 A CN 201810824089A CN 108945327 B CN108945327 B CN 108945327B
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- Prior art keywords
- suction pile
- prismatic
- suction
- equilateral
- soil
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- 239000002689 soil Substances 0.000 claims description 28
- 239000004927 clay Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 4
- 230000001154 acute effect Effects 0.000 claims description 2
- 238000013016 damping Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005527 soil sampling Methods 0.000 description 1
- 238000000545 stagnation point adsorption reflectometry Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B35/4406—Articulated towers, i.e. substantially floating structures comprising a slender tower-like hull anchored relative to the marine bed by means of a single articulation, e.g. using an articulated bearing
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Revetment (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a suction pile of a buoyancy tower platform, which is of a closed structure with an open bottom, wherein a pipeline is arranged at the top of the suction pile.
Description
Technical Field
The invention relates to a suction pile or suction anchor of a buoyancy tower platform, belonging to the field of ocean engineering.
Background
The buoyancy tower platform is a platform which is also used for collecting and storing condensate or crude oil, the appearance of the buoyancy tower platform is similar to that of a SPAR platform, but the buoyancy tower platform is different from the buoyancy tower platform, the cabin body structure of the buoyancy tower platform extends to the seabed and is fixed on the seabed through a self-contained shallow foundation cylindrical suction pile which plays a role in hinging and moves along with waves, the suction pile swings in the waves along with the platform, in view of the fact that the main body of the suction pile is inserted into the soil, and the swinging of the platform and the suction pile is random in direction, the cylindrical suction pile can furthest reduce the resistance generated when the suction pile swings in all directions.
The platforms disclosed in patent numbers 2011800612002 and 2013104737690 in the prior art are representative technologies, and in view of the fact that in the prior art, only one suction pile can be arranged on a buoyancy tower, torsion bending moment cannot be formed, the torsion resistance of the traditional cylindrical suction pile is extremely weak, the platforms are easy to integrally rotate in stormy waves, and the platforms can only be pulled through auxiliary means and cannot rotate.
Disclosure of Invention
The invention aims to overcome the defect of weak torsion resistance of a buoyancy tower platform and provides a polygonal prismatic suction pile which is suitable for a buoyancy tower and can enhance the torsion resistance so as to enhance the integral torsion resistance of the buoyancy tower.
In order to solve the technical problems, the suction pile of the buoyancy tower platform is of a closed structure with an open bottom and a closed top, a pipeline is arranged at the top of the suction pile, and the suction pile is prismatic.
According to the technical scheme, the suction pile is an equilateral polyhedral prism, and the number of prismatic surfaces of the equilateral polyhedral prism is 8-24.
According to the technical scheme, the prismatic surface of the suction pile is adjusted according to the degree of seabed soil softness, and when the soil main body is clay and is far away from the liquid limit, the prismatic suction pile formed by 19 to 24 equilateral surfaces is selected; when the soil main body is clay or sandy soil and is close to the liquid limit, selecting a prismatic suction pile consisting of 12 to 18 equilateral surfaces; when the soil main body is fine sand, 8 to 11 prismatic suction piles consisting of equilateral surfaces are selected.
According to the further optimized scheme of the technical scheme, when the number of prismatic surfaces is 8-11, the outer side wall of the suction pile is longitudinally provided with the protruding members, and the protruding members are arranged at the connecting positions between the adjacent prismatic surfaces.
In a further preferred embodiment of the above technical solution, the protruding member is an acute triangular prism member.
Compared with the cylindrical suction pile of the existing buoyancy tower platform, the suction pile of the buoyancy tower platform greatly enhances the integral torsion resistance of the buoyancy tower.
Drawings
FIG. 1 is a block diagram of a conventional cylindrical suction pile for a platform;
FIG. 2 is a diagram of a prismatic suction pile structure with a platform formed by 8 equilateral faces;
FIG. 3 is a block diagram of a prismatic suction pile formed by 8 equilateral faces of a platform and with surface protruding members added;
fig. 4 is a cross-section comparison of an equilateral prismatic suction pile with 8 to 24 faces and a cylindrical suction pile.
Detailed Description
Embodiments of the present invention will be described below with reference to fig. 1 to 4.
Suction pile 1 is a support of the buoyant tower platform at the bottom of the seabed and serves as a hinge connecting the platform to the seabed.
The polygonal prismatic suction pile 1 disclosed by the invention is characterized in that the traditional cylindrical suction pile 1 is replaced by the polygonal prismatic suction pile 1, so that the integral torsion resistance of the platform in stormy waves is enhanced, and the connection mode of the prismatic suction pile 1 and the platform is consistent with that of the traditional cylindrical suction pile 1.
The lower surface of the prismatic suction pile 1 is open, the top is closed, and the top is provided with a ventilation/water gap which extends to above the sea level, so that the prismatic suction pile is convenient for the platform to install and discharge water and gas.
The prismatic suction pile 1 adopts a prism formed by equilateral surfaces so as to maintain the symmetry of the suction pile and keep the vibration damping of the suction pile in any horizontal direction in soil basically balanced.
The number of sides composing the prism-shaped suction pile has upper and lower limits, and if too few sides are adopted to compose the prism, the distribution of the vibration damping of the suction pile on the horizontal plane is seriously uneven, so that the recommended equilateral sides composing the prism cannot be less than 8, while if too many equilateral sides are adopted to compose the prism, the prism can be regarded as a cylinder approximately, the torsion moment of torsion will disappear rapidly, so that the equilateral sides composing the prism cannot be more than 24, and the cross section of the prism-shaped suction pile can be seen in fig. 4, as the figures, an octagonal suction pile cross section 8, a nineteen-sided suction pile cross section 9, a decade-sided suction pile cross section 10, an eleven-sided suction pile cross section 11, a dodecade-sided suction pile cross section 12, a thirteen-sided suction pile cross section 13, a decade-sided suction pile cross section 14, a decade-pentagonal suction pile cross section 15, a decade-sided suction pile cross section 16, a seventeen-sided suction pile cross section 17, an eighteen-sided suction pile cross section 18, a decade-sided suction pile cross section 19, a twenty-sided suction pile cross section 20, a decade-sided suction pile cross section 21, a dodecade-sided suction pile cross section 3.
When the soil body is clay, and is far away from the liquid limit, the prism suction pile consisting of 19 to 24 equilateral surfaces is used under the condition of high non-drainage shear strength.
When the soil body is clay or sandy soil, and is close to the liquid limit, the prism suction pile formed by 12 to 18 equilateral surfaces is used under the condition of low shear strength without drainage.
In fine powder sand which is easy to liquefy or clay which is near to liquefy and has extremely low water-free shear strength, fewer isosceles prisms are needed to maximize the torsion resistance, such as a prismatic suction pile consisting of 8 to 11 isosceles surfaces.
In some soil properties, if the suction pile consisting of 8 equilateral faces is not enough to prevent the platform from twisting, protruding members 2 can be added at the corner ends of the prisms to increase damping, and reference is made in particular to fig. 3.
The design principle of the invention is as follows: the prismatic suction pile 1 is obviously capable of increasing the torsional moment in water, and as the number of constituent prismatic surfaces decreases, the increased torsional moment will increase. In view of the fact that the direction of the waves is random, and the directions in which the buoyancy towers and the suction piles 1 shake are also random, in order to keep the vibration damping of the platform in all directions approximate, the suction piles 1 need to adopt equilateral polyhedral prisms, and if too few faces are adopted to form the equilateral polyhedral prisms, the distribution of the vibration damping of the suction piles 1 on the horizontal plane is seriously uneven, so that the performance of the platform is affected, and therefore, it is recommended that the number of equilateral faces forming the prisms is not less than 8. If too many equilateral faces are used to compose the prism, the prism will be made to be approximately a cylinder, and the torsional bending moment will disappear rapidly, so it is recommended that the number of equilateral faces composing the prism cannot be more than 24. The prismatic suction pile formed by more than one surface is adopted, and various test results of static sounding of the sea area rock soil and relevant soil sampling are required to be installed according to the platform, especially the non-drainage shear strength of the soil and the liquidity and plasticity index of the soil. When the soil body is clay, the soil body is far away from the liquid limit, and the shear strength of the water is not high, the prismatic suction pile formed by 19 to 24 equilateral surfaces is used, because the prismatic suction pile formed by more equilateral surfaces can provide enough torsional moment when the soil body is compact, and meanwhile, excessive vibration damping of the suction pile can not be increased, and in the compact soil body, the excessive vibration damping can easily cause structural damage of the suction pile; when the soil body is clay or sandy soil, and is close to the liquid limit, under the condition of low shear strength without drainage, the prismatic suction pile formed by 12 to 18 equilateral surfaces is used, so that the torsional moment provided by the prismatic suction pile formed by more equilateral surfaces is insufficient when the soil is softer, the number of surfaces is required to be reduced to increase the torsional moment, and in the soft soil, the structural damage of the suction pile can not be generated when the shaking damping is slightly increased; finally, in fine powder sand which is easy to liquefy or clay which is nearly liquefied and has extremely low water-free shear strength, fewer isosurface prisms are needed to maximize the torsion resistance, namely, a prismatic suction pile consisting of 8 to 11 isosceles surfaces is used, under the soil, excessive vibration damping can not bring structural damage to the suction pile 1, and in such a case, a protruding member 2 can be added on the surface of the suction pile to increase torsion resistance moment.
Claims (3)
1. The utility model provides a suction stake of buoyancy tower platform, the suction stake is open top seal structure in bottom, and the top of suction stake is provided with pipeline, its characterized in that: the suction pile is prismatic;
the suction piles are equilateral polyhedral prisms, and the number of prismatic surfaces of the equilateral polyhedral prisms is 8 to 24;
the prismatic surface of the suction pile is adjusted according to the degree of the looseness of the seabed soil, and when the soil main body is clay and is far away from the liquid limit, a prismatic suction pile formed by 19 to 24 equilateral surfaces is selected; when the soil main body is clay or sandy soil and is close to the liquid limit, selecting a prismatic suction pile consisting of 12 to 18 equilateral surfaces; when the soil main body is fine sand, 8 to 11 prismatic suction piles consisting of equilateral surfaces are selected;
the suction pile is a support of the buoyancy tower platform at the bottom of the seabed and plays a role in hinging the connection platform with the seabed.
2. The suction pile of a buoyant tower platform of claim 1, wherein: when the number of prismatic surfaces is 8 to 11, the outer side wall of the suction pile is longitudinally provided with protruding members, and the protruding members are arranged at the connecting positions between the adjacent prismatic surfaces.
3. The suction pile of a buoyant tower platform of claim 2, wherein: the protruding member is an acute triangular prism member.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810824089.1A CN108945327B (en) | 2018-07-25 | 2018-07-25 | Suction pile of buoyancy tower platform |
| PCT/CN2018/113315 WO2020019560A1 (en) | 2018-07-25 | 2018-11-01 | Suction pile of buoyant tower platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810824089.1A CN108945327B (en) | 2018-07-25 | 2018-07-25 | Suction pile of buoyancy tower platform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108945327A CN108945327A (en) | 2018-12-07 |
| CN108945327B true CN108945327B (en) | 2024-03-22 |
Family
ID=64463666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810824089.1A Active CN108945327B (en) | 2018-07-25 | 2018-07-25 | Suction pile of buoyancy tower platform |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108945327B (en) |
| WO (1) | WO2020019560A1 (en) |
Citations (9)
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|---|---|---|---|---|
| KR20090084172A (en) * | 2008-01-31 | 2009-08-05 | 한국해양연구원 | Level control apparatus of marine equipments using suction pile |
| CN202039382U (en) * | 2011-03-29 | 2011-11-16 | 中国水电顾问集团华东勘测设计研究院 | Ribbing seabed suction anchor |
| CN102605766A (en) * | 2012-02-28 | 2012-07-25 | 王振东 | Foundation pile and method for improving bearing capacity of foundation pile |
| CN103195041A (en) * | 2013-04-25 | 2013-07-10 | 浙江海洋学院 | Anti-sedimentation pile for ocean wave power generation platform |
| CN103482036A (en) * | 2013-10-12 | 2014-01-01 | 惠生（南通）重工有限公司 | Buoyancy tower type ocean platform |
| CN104395530A (en) * | 2013-01-22 | 2015-03-04 | 吴植融 | Suction-type pile leg, offshore caisson, and seabed-fixed offshore platform |
| CN105002874A (en) * | 2015-07-21 | 2015-10-28 | 天津港航工程有限公司 | Movable steel platform for offshore construction work |
| CN105401577A (en) * | 2014-09-10 | 2016-03-16 | 天津市海王星海上工程技术股份有限公司 | Suction type pile shoe suitable for self-lifting platform and mounting method |
| CN207244617U (en) * | 2017-09-20 | 2018-04-17 | 浙江大学城市学院 | A kind of new polygon pre-stress hollow stake |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6783302B2 (en) * | 2002-12-02 | 2004-08-31 | Robert W. Copple | Buoyant leg structure with added tubular members for supporting a deep water platform |
| PE20121200A1 (en) * | 2010-10-19 | 2012-08-24 | Horton Wison Deepwater Inc | HIGH SEA TOWER FOR DRILLING AND / OR PRODUCTION |
| CN205134299U (en) * | 2015-11-05 | 2016-04-06 | 山东科技大学 | Can strengthen novel suction anchor of twisting resistance and withdrawal resistance |
| CN108820150B (en) * | 2018-07-25 | 2019-12-31 | 惠生（南通）重工有限公司 | Tower body of buoyancy tower platform |
-
2018
- 2018-07-25 CN CN201810824089.1A patent/CN108945327B/en active Active
- 2018-11-01 WO PCT/CN2018/113315 patent/WO2020019560A1/en active Application Filing
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090084172A (en) * | 2008-01-31 | 2009-08-05 | 한국해양연구원 | Level control apparatus of marine equipments using suction pile |
| CN202039382U (en) * | 2011-03-29 | 2011-11-16 | 中国水电顾问集团华东勘测设计研究院 | Ribbing seabed suction anchor |
| CN102605766A (en) * | 2012-02-28 | 2012-07-25 | 王振东 | Foundation pile and method for improving bearing capacity of foundation pile |
| CN104395530A (en) * | 2013-01-22 | 2015-03-04 | 吴植融 | Suction-type pile leg, offshore caisson, and seabed-fixed offshore platform |
| CN103195041A (en) * | 2013-04-25 | 2013-07-10 | 浙江海洋学院 | Anti-sedimentation pile for ocean wave power generation platform |
| CN103482036A (en) * | 2013-10-12 | 2014-01-01 | 惠生（南通）重工有限公司 | Buoyancy tower type ocean platform |
| CN105401577A (en) * | 2014-09-10 | 2016-03-16 | 天津市海王星海上工程技术股份有限公司 | Suction type pile shoe suitable for self-lifting platform and mounting method |
| CN105002874A (en) * | 2015-07-21 | 2015-10-28 | 天津港航工程有限公司 | Movable steel platform for offshore construction work |
| CN207244617U (en) * | 2017-09-20 | 2018-04-17 | 浙江大学城市学院 | A kind of new polygon pre-stress hollow stake |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020019560A1 (en) | 2020-01-30 |
| CN108945327A (en) | 2018-12-07 |
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Country or region after: China Address after: 226000 port industrial zone 3, Nantong Economic and Technological Development Zone, Jiangsu Province Applicant after: Wison Clean Energy Technology Group Co.,Ltd. Address before: 226009 Jianghai Road 189, Nantong Economic and Technological Development Zone, Nantong City, Jiangsu Province Applicant before: WISON(NANTONG) HEAVY INDUSTRY Co.,Ltd. Country or region before: China |
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