CN113152546A - Offshore wind power suction barrel periphery soil body reinforcing device - Google Patents
Offshore wind power suction barrel periphery soil body reinforcing device Download PDFInfo
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- CN113152546A CN113152546A CN202110548091.2A CN202110548091A CN113152546A CN 113152546 A CN113152546 A CN 113152546A CN 202110548091 A CN202110548091 A CN 202110548091A CN 113152546 A CN113152546 A CN 113152546A
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- cylinder
- drainage
- suction
- strip
- soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
Abstract
The invention relates to a reinforcing device for soil around a suction drum of offshore wind power, which comprises an internal reinforcing bar, a drainage bar, an external reinforcing bar, a soil blocking layer, a drainage layer and a drainage hole, wherein the internal reinforcing bar is welded on the inner wall of the suction drum and is uniformly distributed along the drum wall; the outer cylinder stiffening bars are welded on the outer wall of the suction cylinder, are uniformly distributed along the cylinder wall and correspond to the arrangement positions of the inner cylinder stiffening bars; the drainage strip is welded at the bottom of the top cover of the suction barrel and is distributed in an outward radiation mode by taking the central shaft of the suction barrel as an original point, and an internal channel of the drainage strip is correspondingly communicated with an internal channel of the stiffening strip in the barrel to form a drainage channel. The reinforcing devices are uniformly distributed along the cylinder wall and are distributed from the mud surface to the cylinder bottom, so that the consolidation drainage path of the soil around the cylinder is greatly shortened, and the drainage efficiency of the soil around the cylinder is effectively improved; after the soil body around the cylinder is drained and consolidated, the strength and the deformation modulus of the soil body are improved, and the tests show that the soil body has beneficial effects on the bearing capacity and the deformation of the suction cylinder.
Description
Technical Field
The invention relates to an offshore wind power suction barrel, in particular to a soil body reinforcing device around the offshore wind power suction barrel.
Background
In the development of renewable energy sources, wind power generation has the advantages of large reserves and wide distribution, and becomes the key point of the current global new energy development, wherein offshore wind power becomes one of the main directions of recent global energy development of various countries due to the advantages of high wind speed, stable wind direction, low turbulence intensity, low land cost, low energy transportation cost and the like.
In offshore wind power construction, the investment of a fan foundation is huge, in order to cope with a complex offshore environment, the existing offshore wind power foundation types are various, the main fan foundation types comprise a single-pile foundation, a suction barrel type foundation and the like, and the suction barrel type foundation is the key point for the research of recent offshore wind power due to the fact that the suction barrel type foundation is convenient to transport in a floating mode, quick to mount in a suction sinking mode and high in overturning resistance bearing capacity. The suction cylinder foundation has the characteristic of bearing a shallow foundation and has certain requirements on the strength and the deformation modulus of a shallow soil body of an offshore wind farm, the shallow soil body of the offshore wind farm in China is mainly made of silt clay, the strength and the compression modulus are low, the existing suction cylinder foundation is low in strength and low in drainage, and the suction cylinder foundation is not suitable for an environment mainly made of the silt clay.
Disclosure of Invention
In order to solve the problems, the invention provides a device for reinforcing soil around a suction drum of offshore wind power, which effectively improves the drainage efficiency of the soil around the drum and provides safe storage for the safe operation of a suction drum foundation.
The technical scheme adopted by the invention is as follows: the utility model provides a marine wind power suction section of thick bamboo week soil body reinforcing apparatus which characterized in that: the suction tube comprises an inner tube stiffening strip, a drainage strip, an outer tube stiffening strip, a soil blocking layer, a drainage layer and a drainage hole, wherein the inner tube stiffening strip is welded on the inner wall of the suction tube and is uniformly distributed along the tube wall; the outer cylinder stiffening bars are welded on the outer wall of the suction cylinder, are uniformly distributed along the cylinder wall and correspond to the arrangement positions of the inner cylinder stiffening bars; the drainage bar is welded at the bottom of the top cover of the suction cylinder and is distributed radially outwards by taking the central shaft of the suction cylinder as an original point, and an internal channel of the drainage bar is correspondingly communicated with an internal channel of the stiffening bar in the cylinder to form a drainage channel;
soil blocking layers and water draining layers are arranged between the cylinder inner stiffening strip and the suction cylinder inner wall and between the cylinder outer stiffening strip and the suction cylinder outer wall, and the soil blocking layers are close to the cylinder inner stiffening strip or the cylinder outer stiffening strip; the drainage layer is filled in the stiffening strip and the drainage strip drainage channel in the cylinder or the drainage channel of the stiffening strip outside the cylinder; the drain hole is arranged on the top cover of the suction cylinder and penetrates through the upper surface of the drain strip.
Preferably, the side walls of the cylinder internal stiffening strip and the cylinder external stiffening strip are provided with side holes for discharging water of soil mass around the cylinder to accelerate soil mass consolidation.
Furthermore, the aperture of the side hole is 10 mm-200 mm.
Preferably, the soil retaining layer and the inner side wall of the stiffening strip in the cylinder are equal in width and length, and the thickness is 2 mm-20 mm.
Preferably, the drainage layer is drainage fabric or particles, and the particle size of the drainage particles is 0.75 mm-10 mm.
Preferably, the drainage hole and the suction barrel negative pressure pumping hole are arranged integrally or independently, and the hole diameter is 10 mm-500 mm.
Preferably, the lengths of the cylinder inner stiffening strips and the cylinder outer stiffening strips are not more than the length of the suction cylinder skirt, the width of the cylinder inner stiffening strips is 50 mm-500 mm, and the distance between every two adjacent cylinder inner stiffening strips is 500 mm-3000 mm.
Furthermore, the length of the internal stiffening strip and the length of the external stiffening strip are not more than 1.2 times of the length of the skirt of the suction tube.
Preferably, the bottoms of the cylinder inner stiffening strip and the cylinder outer stiffening strip are provided with drag reduction cones, and the width of the top of the cylinder inner stiffening strip is equal to that of the drainage strip.
Preferably, the soil retaining layer is soil retaining fabric or a grid.
The beneficial effects obtained by the invention are as follows: the invention is welded on the wall and the cover of the suction drum (the inner stiffening bar and the outer stiffening bar are welded on the wall, the drainage bar is welded on the cover), the strength is higher, the invention can replace the stiffening rib plate of the suction drum foundation, and the structural strength of the suction drum foundation main body is enhanced; the reinforcing device is filled with drainage fabrics or particles (namely a drainage layer), so that free water contained in the soil body around the cylinder can be drained through a dominant seepage channel formed by the drainage fabrics or the particles, and the consolidation rate of the soil body around the cylinder is accelerated; the reinforcing devices are uniformly distributed along the cylinder wall and are distributed from the mud surface to the cylinder bottom, so that the consolidation drainage path of the soil around the cylinder is greatly shortened, and the drainage efficiency of the soil around the cylinder is effectively improved; after the soil body around the suction tube is drained and consolidated, the strength and the deformation modulus of the soil body are improved, the bearing capacity and the deformation of the suction tube are all beneficially affected by the verification, higher safe storage is provided for the safe operation of the suction tube foundation, and the design engineering quantity and the construction cost of the foundation can be reduced by more than 10% under the condition of considering the same load.
Drawings
FIG. 1 is a perspective view of a reinforcement device of the present invention;
FIG. 2 is a cross-sectional layout of a reinforcement device of the present invention;
FIG. 3 is an enlarged view of FIG. 2 at a;
FIG. 4 is a schematic longitudinal cross-sectional view of a reinforcement device of the present invention;
FIG. 5 is an enlarged view of FIG. 4 at b;
FIG. 6 is an enlarged view of FIG. 4 at c;
FIG. 7 is an enlarged view of FIG. 4 at d;
FIG. 8 is a schematic view of the upper slot of the stiffener;
FIG. 9 is a schematic view of openings in a stiffener;
FIG. 10-11 is a bearing capacity variation diagram of soil outside the cylinder under the reinforcing condition;
reference numerals: 1. a stiffening strip within the barrel; 11. a side hole; 2. a drainage strip; 3. a cylinder outer stiffening strip; 4. a soil blocking layer; 5. a drainage layer; 6. a drain hole; 61. a water blocking bolt; 12. a drag reduction cone; 10. a suction drum; 20. a suction canister cap; 30. a suction cylinder skirt.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments.
As shown in fig. 1-9, the device for reinforcing soil around a cylinder of an offshore wind power suction cylinder of the present invention comprises an internal stiffening strip 1, a drainage strip 2, an external stiffening strip 3, a soil retaining layer 4, a drainage layer 5 and a drainage hole 6, wherein: the cylinder inner stiffening strip 1 and the cylinder outer stiffening strip 3 are welded on the cylinder wall (namely the suction cylinder skirt 30) of the suction cylinder 10, the drainage strip 2 is welded on the lower end face of the suction cylinder top cover 20, the overall structure strength is high, the suction cylinder foundation stiffening rib plate can be replaced, and the structural strength of the suction cylinder foundation main body is enhanced. The reinforcing devices are uniformly distributed along the skirt 30 of the suction cylinder and are distributed from the mud surface to the cylinder bottom, so that the consolidation drainage path of the soil around the cylinder is greatly shortened, and the drainage efficiency of the soil around the cylinder is effectively improved; after the soil body around the suction tube is drained and consolidated, the strength and the deformation modulus of the soil body are improved, the bearing capacity and the deformation of the suction tube are both beneficially affected by the verification, and higher safety reserve is provided for the safe operation of the foundation of the suction tube.
Referring to fig. 2-3, in the present embodiment, the internal stiffening bars 1 are welded on the inner wall of the suction cylinder skirt 30, and are uniformly distributed along the circumferential direction of the cylinder wall, the interval (i.e. the interval between the stiffening bars in adjacent cylinders) along the circumference of the cylinder is 500mm to 3000mm, the length of the internal stiffening bars 1 in the cylinder is not more than 1.2 times the length of the suction cylinder skirt 20, and the width is 50mm to 500 mm.
Referring to fig. 8 and 9, the sidewall of the stiffener 1 in the cylinder is provided with a side hole 11 (or a side groove) for discharging the water of the soil outside the cylinder to accelerate the consolidation of the soil. The aperture of the side hole 11 is 10 mm-200 mm, or the width of the side groove is 10 mm-200 mm.
Referring to fig. 7, the bottom of the stiffening bar 1 in the suction tube is a 12-cone-shaped drag reduction cone, which is beneficial to breaking ground and reducing drag during the installation process of the suction tube 10.
The drainage strips 2 are welded at the bottom of the suction cylinder top cover 20 and are distributed radially outwards by taking the central axis of the suction cylinder 10 as the origin; the internal channel of the drainage strip 2 is correspondingly communicated with the internal channel of the cylinder internal stiffening strip 1 to form a drainage channel; a drainage channel is also arranged between the cylinder outer stiffening strip 3 and the suction cylinder skirt 30.
In this embodiment, the external stiffening strip 3 is welded on the outer wall of the suction cylinder skirt 30, and has the same structure as the internal stiffening strip 1.
A soil blocking layer 4 and a water drainage layer 5 are arranged between the cylinder internal stiffening strip 1 and the suction cylinder skirt 30 and between the cylinder external stiffening strip 3 and the suction cylinder skirt 30, and the soil blocking layer 4 is close to the cylinder internal stiffening strip 1 or the cylinder external stiffening strip 4; the drainage layer 5 is filled in the drainage channel formed by the internal stiffening strip 1 and the drainage strip 2 of the cylinder or filled in the drainage channel of the external stiffening strip 3 of the cylinder. The soil retaining layer 4 is as wide as and equal to the inner side wall of the cylinder inner stiffening strip 1 (or the cylinder outer stiffening strip 3), the soil retaining layer 4 is a soil retaining fabric or a grating, and the thickness is 2 mm-20 mm; the drainage layer 5 is drainage fabric or particles, the particle size of the drainage particles is 0.75-10 mm, free water contained in soil around the cylinder is drained through the advantage seepage of the travel of the geotextile or the drainage particles, and the consolidation rate of the soil outside the cylinder is accelerated.
The drain hole 6 is arranged on the suction cylinder top cover 20 and penetrates through the upper surface of the drain strip 2, the drain hole 6 and the suction cylinder negative pressure pumping hole are integrated or are independently arranged, and the aperture is 10 mm-500 mm. The water blocking bolt 61 is arranged in the drain hole 6, the adverse effect of the reinforcing device on negative pressure sinking is eliminated when the suction cylinder 10 is installed by pumping negative pressure, and the water blocking bolt 61 is removed after the suction cylinder 10 is installed in place, so that soil in the cylinder is reinforced.
In this embodiment, the internal stiffening strip 1, the external stiffening strip 3 and the drain bar 2 are made of channel steel or angle steel, the wall thickness of the channel steel is 10mm, the width of the channel steel is 200mm, and the length of the external stiffening strip 1 is 9600 mm.
Referring to fig. 1 and 2, in the present embodiment, the reinforcing apparatus has 16 internal stiffening strips 1 and 16 external stiffening strips 3, and the suction tube 10 shown in the present embodiment is made of steel without separate bin; the soil blocking layer 4 is made of a 5mm thick geotextile and is embedded in the cylinder inner stiffening strip 1 and the cylinder outer stiffening strip 3; the space between the soil blocking layer 4 and the inner wall and the outer wall of the suction cylinder skirt 20 is filled with sandy soil particles with the particle size of 5mm for drainage. The drain hole 6 is communicated with the suction barrel negative pressure mounting hole, the aperture of the drain hole 6 is 200mm, a water blocking bolt 61 is arranged in the drain hole, the outer diameter of the water blocking bolt 61 is 200mm, and the inner diameter of the water blocking bolt is 180 mm.
The reinforcing device is welded on the suction cylinder top cover 20 and the suction cylinder skirt 30, has higher strength, can replace a stiffening rib plate of the suction cylinder foundation and strengthen the structural strength of the main body of the suction cylinder foundation; the reinforcing device is filled with drainage fabrics or particles, free water contained in soil mass around the cylinder can be discharged through a dominant seepage channel formed by the drainage fabrics or the particles, and the consolidation rate of the soil mass around the cylinder is accelerated; the reinforcing devices are uniformly distributed along the cylinder wall and are distributed from the mud surface to the cylinder bottom, so that the consolidation drainage path of the soil around the cylinder is greatly shortened, and the drainage efficiency of the soil around the cylinder is effectively improved; after the soil body around the cylinder is drained and consolidated, the strength and the deformation modulus of the soil body are improved, when the soil body within the range of 1m around the cylinder is reinforced, the horizontal bearing capacity and the anti-overturning bearing capacity of the suction cylinder are respectively improved by 45.45 percent and 53.11 percent, as shown in figures 10-11, the bearing capacity of the suction cylinder is greatly improved. Under the same load combination, the suction tube using the structure can reduce the design engineering amount by 11 percent and save the foundation cost by 11 percent.
The foregoing shows and describes the general principles and principal structural features of the present invention. The present invention is not limited to the above examples, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a marine wind power suction section of thick bamboo week soil body reinforcing apparatus which characterized in that: the suction tube comprises an inner tube stiffening strip (1), a drainage strip (2), an outer tube stiffening strip (3), a soil blocking layer (4), a drainage layer (5) and a drainage hole (6), wherein the inner tube stiffening strip (1) is welded on the inner wall of the suction tube and is uniformly distributed along the tube wall; the outer cylinder stiffening strips (3) are welded on the outer wall of the suction cylinder, are uniformly distributed along the cylinder wall and correspond to the arrangement positions of the inner cylinder stiffening strips (1); the drainage strip (2) is welded at the bottom of the top cover (20) of the suction cylinder and is distributed radially outwards by taking the central shaft of the suction cylinder as an original point, and an internal channel of the drainage strip (2) is correspondingly communicated with an internal channel of the stiffening strip (1) in the cylinder to form a drainage channel;
a soil blocking layer (4) and a water drainage layer (5) are arranged between the cylinder inner stiffening strip (1) and the suction cylinder inner wall and between the cylinder outer stiffening strip (3) and the suction cylinder outer wall, and the soil blocking layer (4) is close to the cylinder inner stiffening strip (1) or the cylinder outer stiffening strip (3); the drainage layer (5) is filled in a drainage channel formed by the cylinder internal stiffening strip (1) and the drainage strip (2), or filled in a drainage channel of the cylinder external stiffening strip (3); the drain hole (6) is arranged on the top cover (20) of the suction cylinder and penetrates through the upper surface of the drain strip (2).
2. The offshore wind power suction drum circumference soil body reinforcing device of claim 1, wherein: the side walls of the cylinder internal stiffening strip (1) and the cylinder external stiffening strip (3) are provided with side holes (11) for discharging water of soil around the cylinder to accelerate soil consolidation.
3. The offshore wind power suction drum circumference soil body reinforcing device of claim 2, wherein: the aperture of the side hole (11) is 10 mm-200 mm.
4. The offshore wind power suction drum circumference soil body reinforcing device of claim 1, wherein: the soil blocking layer (4) is equal in width and length to the inner side wall of the stiffening strip (1) in the cylinder, and the thickness of the soil blocking layer is 2 mm-20 mm.
5. The offshore wind power suction drum circumference soil body reinforcing device of claim 1, wherein: the drainage layer (5) is drainage fabric or particles, and the particle size of the drainage particles is 0.75-10 mm.
6. The offshore wind power suction drum circumference soil body reinforcing device of claim 1, wherein: the drain hole (6) and the suction barrel negative pressure pumping hole are integrated or independently arranged, and the aperture is 10-500 mm.
7. The offshore wind power suction cylinder circumference soil body reinforcing device according to any one of claims 1 to 6, characterized in that: the length of the cylinder inner stiffening strip (1) and the length of the cylinder outer stiffening strip (3) are not more than the length of the suction cylinder skirt (30), the width of the cylinder inner stiffening strip is 50 mm-500 mm, and the distance between the adjacent cylinder inner stiffening strips (1) is 500 mm-3000 mm.
8. The offshore wind power suction drum circumference soil body reinforcing device of claim 7, wherein: the lengths of the cylinder inner stiffening strip (1) and the cylinder outer stiffening strip (3) are not more than 1.2 times of the length of the suction cylinder skirt (30).
9. The offshore wind power suction drum circumference soil body reinforcing device of claim 1, wherein: the bottom of the internal stiffening strip (1) and the bottom of the external stiffening strip (3) are both provided with a drag reduction cone (12), and the width of the top of the internal stiffening strip is equal to that of the drainage strip (2).
10. The offshore wind power suction drum circumference soil body reinforcing device of claim 1, wherein: the soil blocking layer (4) is made of soil blocking fabric or grating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110548091.2A CN113152546A (en) | 2021-05-19 | 2021-05-19 | Offshore wind power suction barrel periphery soil body reinforcing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110548091.2A CN113152546A (en) | 2021-05-19 | 2021-05-19 | Offshore wind power suction barrel periphery soil body reinforcing device |
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| CN113152546A true CN113152546A (en) | 2021-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110548091.2A Pending CN113152546A (en) | 2021-05-19 | 2021-05-19 | Offshore wind power suction barrel periphery soil body reinforcing device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000230238A (en) * | 1999-02-09 | 2000-08-22 | Ohbayashi Corp | Caisson skeleton for underwater foundation structure and construction method for underwater foundation structure therewith |
| KR20130037383A (en) * | 2011-10-06 | 2013-04-16 | 한국건설기술연구원 | Fiber reinforced plastic suction foundation and construction method |
| WO2014183450A1 (en) * | 2013-05-15 | 2014-11-20 | Li Shengnan | Method for constructing confinement structure unit of ecological aquafarming facility, confinement structure of same, and application thereof |
| CN107675721A (en) * | 2017-09-14 | 2018-02-09 | 南方科技大学 | One kind prevents liquefied suction type bucket foundation device |
| CN108316334A (en) * | 2018-01-04 | 2018-07-24 | 浙江大学城市学院 | A kind of liquefied double-walled suction tube basis of automation prevention |
| CN109555149A (en) * | 2019-01-12 | 2019-04-02 | 大连理工大学 | A kind of ocean suction type cylindrical foundation bracing means and its construction method |
| US20200248423A1 (en) * | 2017-08-17 | 2020-08-06 | Siemens Gamesa Renewable Energy A/S | Segmented suction bucket |
| CN112900471A (en) * | 2021-01-20 | 2021-06-04 | 长江勘测规划设计研究有限责任公司 | Soil body reinforcing device in offshore wind power suction barrel |
-
2021
- 2021-05-19 CN CN202110548091.2A patent/CN113152546A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000230238A (en) * | 1999-02-09 | 2000-08-22 | Ohbayashi Corp | Caisson skeleton for underwater foundation structure and construction method for underwater foundation structure therewith |
| KR20130037383A (en) * | 2011-10-06 | 2013-04-16 | 한국건설기술연구원 | Fiber reinforced plastic suction foundation and construction method |
| WO2014183450A1 (en) * | 2013-05-15 | 2014-11-20 | Li Shengnan | Method for constructing confinement structure unit of ecological aquafarming facility, confinement structure of same, and application thereof |
| US20200248423A1 (en) * | 2017-08-17 | 2020-08-06 | Siemens Gamesa Renewable Energy A/S | Segmented suction bucket |
| CN107675721A (en) * | 2017-09-14 | 2018-02-09 | 南方科技大学 | One kind prevents liquefied suction type bucket foundation device |
| CN108316334A (en) * | 2018-01-04 | 2018-07-24 | 浙江大学城市学院 | A kind of liquefied double-walled suction tube basis of automation prevention |
| CN109555149A (en) * | 2019-01-12 | 2019-04-02 | 大连理工大学 | A kind of ocean suction type cylindrical foundation bracing means and its construction method |
| CN112900471A (en) * | 2021-01-20 | 2021-06-04 | 长江勘测规划设计研究有限责任公司 | Soil body reinforcing device in offshore wind power suction barrel |
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