CN103195080B - Towing method for gravity foundation - Google Patents
Towing method for gravity foundation Download PDFInfo
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- CN103195080B CN103195080B CN201310105975.6A CN201310105975A CN103195080B CN 103195080 B CN103195080 B CN 103195080B CN 201310105975 A CN201310105975 A CN 201310105975A CN 103195080 B CN103195080 B CN 103195080B
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- type foundation
- buoyancy tank
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Abstract
The invention discloses a towing method for a gravity foundation. The method comprises the steps of recharging seawater in a dock after the gravity foundation is preformed, and stopping recharging when the water level meets the requirement; suspending a plurality of buoyancy tanks on the periphery of the foundation, and recharging seawater again so that the buoyancy tanks and the foundation float upwards simultaneously; and opening a dock gate till the water level in the dock is consistent with the water level outside the dock and the foundation is stable, sailing a towboat in and connecting the towboat with the gravity foundation to tow the gravity foundation to a sinking site. The method is simple, convenient and quick, the buoyancy tanks can be recycled, the towing process is safe and stable, and the storm and wave resistance of the foundation is improved. The method is applicable to gravity foundations of different shapes and widely applied to fields of construction projects of water conservancy projects, ports, oceans, bridges, offshore wind power and the like.
Description
Technical field
The present invention relates to the towage technology of gravity type foundation in offshore wind farm, harbour and ocean engineering, the method for towing of a kind of gravity type foundation of hanging buoyancy tank of special design.
Background technology
Gravity type foundation structure is widely used in the middle of the engineerings such as water conservancy, harbour, ocean, bridge, and the exploitation of countries in the world offshore wind farm especially has in recent years driven new round gravity type foundation to build overbearing tide.The offshore wind farm energy has that wind field turbulivity is little, not land occupation, annual utilization hours advantages of higher.China has the abundant offshore wind farm energy, is 3 times of land wind energy according to statistics.
In offshore wind turbine construction foundation structure modal be pile foundation, gravity type foundation and development in recent years cylindrical foundation faster.The advantages such as gravity type foundation is simple with its structure design, durability is strong are applied in the middle of the good marine site of geological conditions in large quantities.But there is very large defect in gravity type foundation in work progress.Most of gravity type foundation build is large, weight is larger, needs large vessel to carry it and carries out hauling operation, and be not suitable for towage transport; Even if gravity type foundation that can towage, once there is Seepage, can have a strong impact on the safety of gravity type foundation in towage process and operation ship.For this reason, the present invention proposes a kind of gravity type foundation method for towing of hanging airtight air buoyancy tank to improve stability and the safety in gravity type foundation towage process.
Summary of the invention
Aim of the present invention, larger for build and the weight of current most of gravity type foundation, need large vessel to carry it and carry out hauling operation, and be not suitable for the problem of towage transport, a kind of method for towing of the gravity type foundation of hanging air buoyancy tank is provided, and the method can improve stability and the safety of gravity type foundation in towage process effectively.
The present invention is achieved by following technical solution.
A method for towing for gravity type foundation, has following steps:
(1) gravity type foundation 1 pre-formed after, will in dock, recharge seawater; Described gravity type foundation is that top is the hollow structure that cylinder, bottom are cone;
(2) when water level in dock exceed that the total Senior Three of gravity type foundation 1 divides two time stop seawater and recharge, air buoyancy tank A2, air buoyancy tank B3, air buoyancy tank C4 and air buoyancy tank D5 are connected by the anchor cable A I 6, anchor cable A II 7, anchor cable B I 8, anchor cable B II 9, anchor cable C I 10, anchor cable C II 11, anchor cable D I 12 and the anchor cable D II 13 that are arranged on gravity type foundation 1 cone middle part respectively, air buoyancy tank is to the radial periphery that is assemblied in gravity type foundation; Each air buoyancy tank is connected by pin AB22, pin BC23, pin CD24 and pin DA25 between any two; Between each air buoyancy tank and gravity type foundation 1, be respectively arranged with vibration isolator A I 14, vibration isolator A II 15, vibration isolator B I 16, vibration isolator B I 17, vibration isolator C I 18, vibration isolator C II 19, vibration isolator D I 20 and vibration isolator D II 21; Described vibration isolator is separately positioned on inner edge and the base at air buoyancy tank two ends;
(3) when gravity type foundation 1 and air buoyancy tank are connected to after an entirety, again recharge seawater in dock, air buoyancy tank and gravity type foundation 1 start floating; When dock water level is consistent with water level outside dock and gravity type foundation 1 floating stable after, open caisson, open into towboat and connect gravity type foundation 1;
(4) towboat drags gravity type foundation 1 to sinking place, completes towage operation.
The gravity type foundation 1 of described step (1) is reinforced concrete structure, and the cylinder height on its top is 8m, and external diameter is 5m, and the height of lower cone body is 12m, and base diameter is 20m, and thickness is 0.8m.
The air buoyancy tank of described step (2) is steel frame construction, and Plate Welding is made, and steel plate thickness is 1cm; Its longitudinal section is polygon, and long limit and longer sides are respectively 8m and 6m, and its cross section is fan-shaped, and the camber line of interior outside and gravity type foundation 1 adapt; After each airtight air buoyancy tank connects, the external diameter of integral ring-shaped supporting structure is 18m.
The quantity of the air buoyancy tank of described step (2) is 3～8.
The anchor cable of described step (2) is arranged on the upwards 5m place, bottom surface apart from gravity type foundation 1 lower cone body, and anchor cable length is respectively 1.5m and 3m.
The invention has the beneficial effects as follows, adopt the gravity type foundation method for towing of hanging buoyancy tank, can be convenient, fast, the towage task that simply, effectively completes gravity type foundation.In towage process, airtight air buoyancy tank has strengthened stability and the safety of gravity type foundation in towage process, has improved the resistance to storm of gravity type foundation, the ability of resistance to wave.In addition, airtight air buoyancy tank is with low cost, easily manufactured, recoverable, and applicable to the gravity type foundation of the different bodily forms, there is good economy and compliance, be easy to promote.
Brief description of the drawings
Fig. 1 is the generalized section of a kind of gravity type foundation of the present invention and tow attachment;
Fig. 2 is the top view of Fig. 1.
Description of reference numerals is as follows:
1---gravity type foundation 2---air buoyancy tank A
3---air buoyancy tank B 4---air buoyancy tank C
5---air buoyancy tank D 6---anchor cable A I
7---anchor cable A II 8---anchor cable B I
9---anchor cable B II 10---anchor cable C I
11---anchor cable C II 12---anchor cable D I
13---anchor cable D II 14---vibration isolator A I
15---vibration isolator A II 16---vibration isolator B I
17---vibration isolator B I 18---vibration isolator C I
19---vibration isolator C II 20---vibration isolator D I
21---vibration isolator D II 22---pin AB
23---pin BC 24---pin CD
25---pin DA
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
Specific embodiments of the invention, towage basis is 3MW offshore wind turbine gravity type foundation, adopts the gravity type foundation method for towing of hanging buoyancy tank, step is as follows:
(1) gravity type foundation 1 pre-formed after, will in dock, recharge seawater; Described gravity type foundation is that top is the steel concrete hollow structure that cylinder, bottom are cone, and the cylinder height on its top is 8m, and external diameter is 5m, and the height of lower cone body is 12m, and base diameter is 20m, and thickness is 0.8m.
(2) in dock, recharge seawater, when water level in dock exceed that the total Senior Three in basis divides two time stop seawater and recharge, air buoyancy tank A2, air buoyancy tank B3, air buoyancy tank C4 and air buoyancy tank D5 are connected by the anchor cable A I 6, anchor cable A II 7, anchor cable B I 8, anchor cable B II 9, anchor cable C I 10, anchor cable C II 11, anchor cable D I 12 and the anchor cable D II 13 that are arranged on gravity type foundation 1 cone middle part respectively, air buoyancy tank is to the radial periphery that is assemblied in gravity type foundation; Each air buoyancy tank is connected by pin AB22, pin BC23, pin CD24 and pin DA25 between any two; Between each air buoyancy tank and gravity type foundation 1, be respectively arranged with vibration isolator A I 14, vibration isolator A II 15, vibration isolator B I 16, vibration isolator B I 17, vibration isolator C I 18, vibration isolator C II 19, vibration isolator D I 20 and vibration isolator D II 21; Described vibration isolator is separately positioned on inner edge and the base at air buoyancy tank two ends;
The quantity of described air buoyancy tank is 3～8, is steel frame construction, and Plate Welding is made, and steel plate thickness is 1cm; Its longitudinal section is polygon, and long limit and longer sides are respectively 8m and 6m, and its cross section is fan-shaped, and the camber line of interior outside and gravity type foundation 1 adapt; After each airtight air buoyancy tank connects, the external diameter of integral ring-shaped supporting structure is 18m;
Described anchor cable is arranged on the upwards 5m place, bottom surface apart from gravity type foundation 1 lower cone body, and anchor cable length is respectively 1.5m and 3m.
(3) when gravity type foundation 1 and air buoyancy tank are connected to after an entirety, again recharge seawater in dock, air buoyancy tank and gravity type foundation (1) start floating; When after consistent with water level outside dock in dock and gravity type foundation 1 floating stable, open caisson, open into towboat and connect gravity type foundation 1;
(4) towboat drags gravity type foundation 1 to sinking place, completes towage operation.
The present invention can be widely used in, in the engineerings such as water conservancy, harbour, ocean, bridge, having good economy and compliance.
Claims (5)
1. a method for towing for gravity type foundation, has following steps:
(1) gravity type foundation (1) pre-formed after, will in dock, recharge seawater; Described gravity type foundation is that top is the hollow structure that cylinder, bottom are cone;
(2) when water level in dock exceed that the total Senior Three of gravity type foundation (1) divides two time stop seawater and recharge, by air buoyancy tank A (2), air buoyancy tank B (3), air buoyancy tank C (4) and air buoyancy tank D (5) are respectively by being arranged on the anchor cable A I (6) of gravity type foundation (1) cone middle part, anchor cable A II (7), anchor cable B I (8), anchor cable B II (9), anchor cable C I (10), anchor cable C II (11), anchor cable D I (12) is connected with anchor cable D II (13), air buoyancy tank is to the radial periphery that is assemblied in gravity type foundation, each air buoyancy tank is connected by pin AB (22), pin BC (23), pin CD (24) and pin DA (25) between any two, between each air buoyancy tank and gravity type foundation (1), be respectively arranged with vibration isolator A I (14), vibration isolator A II (15), vibration isolator B I (16), vibration isolator B I (17), vibration isolator C I (18), vibration isolator C II (19), vibration isolator D I (20) and vibration isolator D II (21), described vibration isolator is separately positioned on inner edge and the base at air buoyancy tank two ends,
(3) when gravity type foundation (1) and air buoyancy tank are connected to after an entirety, again recharge seawater in dock, air buoyancy tank and gravity type foundation (1) start floating; When after consistent with water level outside dock in dock and gravity type foundation (1) floating stable, open caisson, open into towboat and connect gravity type foundation (1);
(4) towboat drags gravity type foundation (1) to sinking place, completes towage operation.
2. the method for towing of a kind of gravity type foundation according to claim 1, it is characterized in that, the gravity type foundation (1) of described step (1) is reinforced concrete structure, the cylinder height on its top is 8m, external diameter is 5m, the height of lower cone body is 12m, and base diameter is 20m, and thickness is 0.8m.
3. the method for towing of a kind of gravity type foundation according to claim 1, is characterized in that, the air buoyancy tank of described step (2) is steel frame construction, and Plate Welding is made, and steel plate thickness is 1cm; Its longitudinal section is polygon, and long limit and longer sides are respectively 8m and 6m, and its cross section is fan-shaped, and the camber line of interior outside and gravity type foundation (1) adapt; After each airtight air buoyancy tank connects, the external diameter of integral ring-shaped supporting structure is 18m.
4. the method for towing of a kind of gravity type foundation according to claim 1, is characterized in that, the quantity of the air buoyancy tank of described step (2) is 3～8.
5. the method for towing of a kind of gravity type foundation according to claim 1, it is characterized in that, the anchor cable of described step (2) is arranged on the upwards 5m place, bottom surface apart from gravity type foundation (1) lower cone body, and anchor cable length is respectively 1.5m and 3m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310105975.6A CN103195080B (en) | 2013-03-28 | 2013-03-28 | Towing method for gravity foundation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310105975.6A CN103195080B (en) | 2013-03-28 | 2013-03-28 | Towing method for gravity foundation |
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| CN103195080A CN103195080A (en) | 2013-07-10 |
| CN103195080B true CN103195080B (en) | 2014-11-19 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103758147B (en) * | 2014-02-13 | 2015-12-09 | 天津大学前沿技术研究院有限公司 | A kind of gravity type offshore wind crew base and towage thereof and sinking method |
| CN103758148A (en) * | 2014-02-13 | 2014-04-30 | 天津大学前沿技术研究院有限公司 | Gravity type offshore wind power foundation capable of towing in self-floating mode and construction method thereof |
| CN110158637A (en) * | 2019-06-12 | 2019-08-23 | 长江勘测规划设计研究有限责任公司 | Offshore wind farm bucket foundation constructing structure and construction method |
| CN110155264B (en) * | 2019-06-12 | 2023-10-27 | 长江勘测规划设计研究有限责任公司 | Marine fan composite cylinder foundation towing structure and towing method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101748748B (en) * | 2010-01-21 | 2011-09-14 | 道达(上海)风电投资有限公司 | Air flotation towing method of bucket foundation with inbuilt float bowl |
| CN101775812B (en) * | 2010-01-21 | 2011-07-13 | 道达(上海)风电投资有限公司 | Built-in buoy towing barrel-shaped foundation sinking method |
| CN202298643U (en) * | 2011-10-26 | 2012-07-04 | 江苏海上龙源风力发电有限公司 | Negative-pressure cylinder type gravity foundation for offshore wind power |
| KR101171201B1 (en) * | 2011-12-26 | 2012-08-07 | 목포대학교산학협력단 | Offshore wind turbine structure using steel pipe pile foundation and prefabricated structure, and constructing method for the same |
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