CN105672344A - Steel bar reinforced foundation grouting sleeve connection structure and method of offshore wind turbines - Google Patents
Steel bar reinforced foundation grouting sleeve connection structure and method of offshore wind turbines Download PDFInfo
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- CN105672344A CN105672344A CN201610208882.XA CN201610208882A CN105672344A CN 105672344 A CN105672344 A CN 105672344A CN 201610208882 A CN201610208882 A CN 201610208882A CN 105672344 A CN105672344 A CN 105672344A
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- steel
- pipe pile
- grouting
- offshore wind
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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
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- 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 relates to a steel bar reinforced foundation grouting sleeve connection structure of offshore wind turbines, comprising a vertical steel pipe pile and a steel sleeve, wherein the steel pipe pile and the steel sleeve are mutually coaxially nested, an annular cavity is formed between adjacent pipe walls of the nested ends of the steel pipe pile and the steel sleeve, a steel bar to be annularly stressed is banded in the annular cavity, and a grouting body for binding the steel pipe pile with the steel sleeve is filled in the annular cavity. Compared with the traditional grouting connection, the steel bar reinforced foundation grouting sleeve connection structure of offshore wind turbines avoids or delays appearance and development of radial cracks of the grouting body under the horizontal load effect, prevents departure of the grouting body from the steel pipe pile and steel sleeve, improves bending resistant bearing capacity of connection and is particularly suitable for connection between an individual pile foundation and a transition section.
Description
Technical field
The invention provides the offshore wind farm crew base grouting sleeve attachment structure of a kind of configuration reinforcement and method thereof, belong to offshore wind turbine generator foundation structure field.
Background technology
Grouting sleeve connects the overlap joint belonging to two diameter difference pipes and connects, it is the grouting material such as ring-like intra-bladder instillation cement mortar formed between tube wall, shows that out-of-flatness produces mechanical snap and transmits axial compressive force by the bonding between tube wall and grouting body and steel pipe. Grouting sleeve connection has the advantages such as good integrity, easy construction and cost are low, is first used widely in offshore oil production platform structure. In recent years, grouting sleeve connects and is progressively at sea applied in Wind turbines base structure. Contrast offshore oil production platform basis and offshore wind farm crew base it appeared that: 1) offshore wind farm crew base Pile Diameter and radius-thickness ratio bigger. According to Europe 2007 before statistical result, in offshore wind farm engineering use steel-pipe pile radius-thickness ratio be up to 100; The radius-thickness ratio of the steel-pipe pile adopted in offshore oil production platform basis is less than 40. 2) offshore wind farm crew base grouting connecting length is less. Ocean platform grouting connection request connecting length is not less than 6 times of steel-pipe pile diameter; Offshore wind farm grouting connecting length is many at 1.5 ~ 2.5 times of steel-pipe pile diameters. 3) being in the milk with offshore oil production platform compared with connection, the stress that the grouting of offshore wind farm crew base connects is increasingly complex. Offshore wind farm grouting connects except bearing the vertical gravity laod of superstructure and equipment, the circulation power load of wave and seawater corrosion effect, still suffers from bigger blower fan dynamic load. Under blower fan dynamic load function, grouting connecting portion is primarily subjected to Moment.
Under Moment, steel-pipe pile transmits Moment at grouting linkage section by lateral compression power with sleeve pipe, steel-pipe pile that simultaneously moment of flexure causes and connect the vertical stress of sleeve pipe for offshore wind farm unit, is commonly greater than simple vertical load and produces stress value. Test in the past shows, if the stress value that the vertical stress that moment of flexure produces produces less than vertical load, moment of flexure exists the reduction to axial bearing capacity less than 18%.Under Moment, the bar cross section of circular distribution will become ellipse, thus causing occurring between both sides steel surface before and after moment of flexure direction with grouting body separating in various degree; Meanwhile, producing radial displacement being perpendicular to hypomere pressurized side, Moment direction under action of compressive stress, cause that grouting body epimere subrange inner structure face disengages with grouting body, existing test and measured result show that throw-off distances is up to 6mm; Internal portion of being in the milk in Moment direction and is perpendicular to Moment direction compression-side and can produce bigger bending stress, thus causing that radial fissure occurs. Crack can cause the reduction of connecting portion rigidity, and ovalizing deflection strengthens further, and the connection bending bearing capacity under action of static load and under Fatigue Load reduces, and also can indirectly reduce connection resistance to compression bearing capacity.
Summary of the invention
It is an object of the invention to for above weak point, it is provided that the offshore wind farm crew base grouting sleeve attachment structure of a kind of configuration reinforcement and method thereof.
This invention address that the scheme that technical problem adopts is the offshore wind farm crew base grouting sleeve attachment structure of a kind of configuration reinforcement, including vertical steel-pipe pile and steel thimble, described steel-pipe pile is mutually coaxial nested with steel thimble, described steel-pipe pile forms ring-like chamber with steel thimble between the adjacent tube wall of nested end, described ring-like intracavity is banded with the reinforcing bar for annular stress, and described ring-like intracavity is filled with the grouting body for steel-pipe pile and steel thimble being bonded as one.
Further, described steel thimble coaxial sleeve is located at the outside of steel-pipe pile, forms ring-like chamber between outer wall and the inwall of steel thimble of described steel-pipe pile.
Further, described reinforcing bar is symmetrically positioned in middle and upper part and the middle and lower part in ring-like chamber, and described reinforcing bar is banded with several stirrups.
Further, described reinforcing bar is positioned at the middle and upper part at scope place, ring-like chamber 25% and the middle and lower part at 25% scope place.
Further, the grouting mouth place in described ring-like chamber is provided with grouting leak-proof device.
Further, the inwall of described steel thimble is provided with interim rest.
Further, the material of described grouting body is high-strength cement mortar.
The method of attachment of the offshore wind farm crew base grouting sleeve attachment structure of a kind of configuration reinforcement, comprises the following steps:
(1) first that steel thimble is mutually coaxial nested with steel-pipe pile, and assembling reinforcement in the ring-like chamber between steel-pipe pile and the adjacent tube wall of steel thimble, the wherein middle and lower part at the reinforcing bar colligation middle and upper part at scope place, ring-like chamber 25% and 25% scope place respectively;
(2) after reinforcing bar binding completes, at ring-like intra-bladder instillation high-strength cement mortar, steel-pipe pile and steel thimble are bonded as one, and seal at grouting mouth place grouting leak-proof device, complete to connect.
Compared with prior art, the method have the advantages that the present invention is compared with conventional grout connection, avoid or delayed be in the milk under the horizontal loads appearance of body radial fissure and development, prevent grouting body from departing from steel-pipe pile, steel thimble, improve the anti-bending bearing capacity and Compressive Bearing Capacity that connect, be particularly well-suited to the connection of single-pile foundation and changeover portion.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, patent of the present invention is further illustrated.
Fig. 1 is the structural representation of this invention;
In figure:
1-steel-pipe pile; 2-steel thimble; The ring-like chamber of 3-; 4-reinforcing bar; 5-is in the milk body; 6-stirrup; 7-is in the milk leak-proof device; The interim rest of 8-.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
As shown in Figure 1, a kind of offshore wind farm crew base grouting sleeve attachment structure of configuration reinforcement, including vertical steel-pipe pile 1 and steel thimble 2, described steel-pipe pile is mutually coaxial nested with steel thimble, described steel-pipe pile forms ring-like chamber 3 with steel thimble between the adjacent tube wall of nested end, described ring-like intracavity is banded with the reinforcing bar 4 for annular stress, and described ring-like intracavity is filled with the grouting body 5 for steel-pipe pile and steel thimble being bonded as one.
In the present embodiment, described steel thimble coaxial sleeve is located at the outside of steel-pipe pile, forms ring-like chamber between outer wall and the inwall of steel thimble of described steel-pipe pile.
In the present embodiment, described reinforcing bar is symmetrically positioned in middle and upper part and the middle and lower part in ring-like chamber, and described reinforcing bar is banded with several stirrups 6.
In the present embodiment, described reinforcing bar is positioned at the middle and upper part at scope place, ring-like chamber 25% and the middle and lower part at 25% scope place.
In the present embodiment, the grouting mouth place in described ring-like chamber is provided with grouting leak-proof device 7.
In the present embodiment, the inwall of described steel thimble is provided with interim rest 8.
In the present embodiment, the material of described grouting body is high-strength cement mortar.
The method of attachment of the offshore wind farm crew base grouting sleeve attachment structure of a kind of configuration reinforcement, comprises the following steps:
(1) first that steel thimble is mutually coaxial nested with steel-pipe pile, and assembling reinforcement in the ring-like chamber between steel-pipe pile and the adjacent tube wall of steel thimble, the wherein middle and lower part at the reinforcing bar colligation middle and upper part at scope place, ring-like chamber 25% and 25% scope place respectively;
(2) after reinforcing bar binding completes, at ring-like intra-bladder instillation high-strength cement mortar, steel-pipe pile and steel thimble are bonded as one, and seal at grouting mouth place grouting leak-proof device, complete to connect.
Above-listed preferred embodiment; the object, technical solutions and advantages of the present invention have been further described; it is it should be understood that; the foregoing is only presently preferred embodiments of the present invention; not in order to limit the present invention; all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (8)
1. the offshore wind farm crew base grouting sleeve attachment structure of a configuration reinforcement, it is characterized in that: include vertical steel-pipe pile and steel thimble, described steel-pipe pile is mutually coaxial nested with steel thimble, described steel-pipe pile forms ring-like chamber with steel thimble between the adjacent tube wall of nested end, described ring-like intracavity is banded with the reinforcing bar for annular stress, and described ring-like intracavity is filled with the grouting body for steel-pipe pile and steel thimble being bonded as one.
2. the offshore wind farm crew base grouting sleeve attachment structure of configuration reinforcement according to claim 1, it is characterised in that: described steel thimble coaxial sleeve is located at the outside of steel-pipe pile, forms ring-like chamber between outer wall and the inwall of steel thimble of described steel-pipe pile.
3. the offshore wind farm crew base grouting sleeve attachment structure of configuration reinforcement according to claim 1, it is characterised in that: described reinforcing bar is symmetrically positioned in middle and upper part and the middle and lower part in ring-like chamber, and described reinforcing bar is banded with several stirrups.
4. the offshore wind farm crew base grouting sleeve attachment structure of configuration reinforcement according to claim 1, it is characterised in that: described reinforcing bar is positioned at the middle and upper part at scope place, ring-like chamber 25% and the middle and lower part at 25% scope place.
5. the offshore wind farm crew base grouting sleeve attachment structure of configuration reinforcement according to claim 1, it is characterised in that: the grouting mouth place in described ring-like chamber is provided with grouting leak-proof device.
6. the offshore wind farm crew base grouting sleeve attachment structure of configuration reinforcement according to claim 2, it is characterised in that: the inwall of described steel thimble is provided with interim rest.
7. the offshore wind farm crew base grouting sleeve attachment structure of configuration reinforcement according to claim 1, it is characterised in that: the material of described grouting body is high-strength cement mortar.
8. the method for attachment of the offshore wind farm crew base grouting sleeve attachment structure of a configuration reinforcement, it is characterised in that comprise the following steps:
(1) first that steel thimble is mutually coaxial nested with steel-pipe pile, and assembling reinforcement in the ring-like chamber between steel-pipe pile and the adjacent tube wall of steel thimble, the wherein middle and lower part at the reinforcing bar colligation middle and upper part at scope place, ring-like chamber 25% and 25% scope place respectively;
(2) after reinforcing bar binding completes, at ring-like intra-bladder instillation high-strength cement mortar, steel-pipe pile and steel thimble are bonded as one, and seal at grouting mouth place grouting leak-proof device, complete to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208882.XA CN105672344A (en) | 2016-04-06 | 2016-04-06 | Steel bar reinforced foundation grouting sleeve connection structure and method of offshore wind turbines |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208882.XA CN105672344A (en) | 2016-04-06 | 2016-04-06 | Steel bar reinforced foundation grouting sleeve connection structure and method of offshore wind turbines |
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| CN105672344A true CN105672344A (en) | 2016-06-15 |
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| CN201610208882.XA Pending CN105672344A (en) | 2016-04-06 | 2016-04-06 | Steel bar reinforced foundation grouting sleeve connection structure and method of offshore wind turbines |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10100486B2 (en) | 2014-03-28 | 2018-10-16 | Public Joint Stock Company “Transneft” | Method for installing overhead transmission line supports on permafrost soils |
| US10443207B2 (en) | 2014-03-28 | 2019-10-15 | Public Joint Stock Company “Transneft” | Pile foundations for supporting power transmission towers |
| CN112195962A (en) * | 2020-09-27 | 2021-01-08 | 中国电建集团华东勘测设计研究院有限公司 | Offshore electric platform pile-sleeve foundation structure with anti-sinking box structure |
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| CN201517216U (en) * | 2009-10-16 | 2010-06-30 | 上海宝钢工程技术有限公司 | Adjustable connection node for fan basic steel pile and conversion steel structure |
| CN201746845U (en) * | 2010-04-02 | 2011-02-16 | 中国海洋石油总公司 | Pile foundation type foundation structure applicable to ocean engineering |
| CN202187363U (en) * | 2011-07-19 | 2012-04-11 | 中国水电顾问集团华东勘测设计研究院 | Shear cylinder structure for grouting connection of offshore wind power foundation structure |
| CN103967036A (en) * | 2014-05-07 | 2014-08-06 | 中国水电顾问集团华东勘测设计研究院有限公司 | Pile and sleeve grouting connecting structure for offshore wind power generation and construction method thereof |
| JP2014163154A (en) * | 2013-02-26 | 2014-09-08 | Shimizu Corp | Structure and construction method of anchorage part of anchor bolt |
| CN205557551U (en) * | 2016-04-06 | 2016-09-07 | 福州大学 | Configuration rebar's offshore wind turbines foundation grouting bushing structure |
-
2016
- 2016-04-06 CN CN201610208882.XA patent/CN105672344A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201517216U (en) * | 2009-10-16 | 2010-06-30 | 上海宝钢工程技术有限公司 | Adjustable connection node for fan basic steel pile and conversion steel structure |
| CN201746845U (en) * | 2010-04-02 | 2011-02-16 | 中国海洋石油总公司 | Pile foundation type foundation structure applicable to ocean engineering |
| CN202187363U (en) * | 2011-07-19 | 2012-04-11 | 中国水电顾问集团华东勘测设计研究院 | Shear cylinder structure for grouting connection of offshore wind power foundation structure |
| JP2014163154A (en) * | 2013-02-26 | 2014-09-08 | Shimizu Corp | Structure and construction method of anchorage part of anchor bolt |
| CN103967036A (en) * | 2014-05-07 | 2014-08-06 | 中国水电顾问集团华东勘测设计研究院有限公司 | Pile and sleeve grouting connecting structure for offshore wind power generation and construction method thereof |
| CN205557551U (en) * | 2016-04-06 | 2016-09-07 | 福州大学 | Configuration rebar's offshore wind turbines foundation grouting bushing structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10100486B2 (en) | 2014-03-28 | 2018-10-16 | Public Joint Stock Company “Transneft” | Method for installing overhead transmission line supports on permafrost soils |
| US10443207B2 (en) | 2014-03-28 | 2019-10-15 | Public Joint Stock Company “Transneft” | Pile foundations for supporting power transmission towers |
| CN112195962A (en) * | 2020-09-27 | 2021-01-08 | 中国电建集团华东勘测设计研究院有限公司 | Offshore electric platform pile-sleeve foundation structure with anti-sinking box structure |
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Application publication date: 20160615 |
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