CN112900471A - Soil body reinforcing device in offshore wind power suction barrel - Google Patents
Soil body reinforcing device in offshore wind power suction barrel Download PDFInfo
- Publication number
- CN112900471A CN112900471A CN202110077401.7A CN202110077401A CN112900471A CN 112900471 A CN112900471 A CN 112900471A CN 202110077401 A CN202110077401 A CN 202110077401A CN 112900471 A CN112900471 A CN 112900471A
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- Prior art keywords
- cylinder
- drainage
- soil body
- suction
- strip
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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
- E02D27/52—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 soil body reinforcing device in a suction tube of offshore wind power, which comprises a stiffening strip, a drainage strip, a soil retaining layer, a drainage layer and a drainage hole in the tube, wherein the reinforcing device is welded on the inner wall of the suction tube, has higher rigidity, can replace a stiffening rib plate in a suction tube foundation and strengthens the structural rigidity of a main body of the suction tube foundation; the reinforcing device is internally filled with a drainage layer (geotextile or drainage particulate matter), so that free water contained in the soil body in the cylinder can be drained through the seepage of the advantages of the travel of the geotextile or the drainage particulate matter, and the consolidation rate of the soil body in 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 body in the cylinder is greatly shortened, and the drainage efficiency of the soil body in the cylinder is effectively improved; after the soil body in the cylinder 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 cylinder are both beneficially affected by the verification, and higher safe storage is provided for safe operation of the suction cylinder foundation.
Description
Technical Field
The invention relates to an offshore wind power suction barrel, in particular to a soil body reinforcing device in the offshore wind power suction barrel.
Background
Offshore wind power is one of the main directions for energy development of all countries in the world recently 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 of recent offshore wind power research 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, has certain requirements on the strength and the deformation modulus of a shallow soil body of an offshore wind farm, and the shallow soil body of the offshore wind farm in China is mainly made of silt clay and has lower strength and compression modulus, so that the application of the suction cylinder foundation is limited.
Disclosure of Invention
In order to solve the problems, the invention provides a soil body reinforcing device in a suction cylinder of offshore wind power, which effectively improves the drainage efficiency of the soil body in the cylinder and provides safe storage for the safe operation of the foundation of the suction cylinder.
The technical scheme adopted by the invention is as follows: the utility model provides a soil body reinforcing apparatus in marine wind power suction section of thick bamboo welds on suction section of thick bamboo inner wall, its characterized in that: the suction tube comprises an inner stiffening bar, a drainage bar, a soil blocking layer, a drainage layer and a drainage hole, wherein the inner stiffening bar is welded on the inner wall of the suction tube and is uniformly distributed along the wall of the suction tube; the drainage bars are welded at the bottom of the top cover of the suction cylinder and are distributed radially outwards by taking the central shaft of the suction cylinder as an origin; the internal channel of the drainage strip is correspondingly communicated with the internal channel of the stiffening strip in the cylinder to form a drainage channel; the soil blocking layer is arranged on the inner wall of the stiffening strip in the cylinder, and the drainage layer is filled in the drainage channel; 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 wall of the stiffening bar in the cylinder is provided with a side hole for discharging the water in the soil body in the cylinder to accelerate the consolidation of the soil body.
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 length of the cylinder inner stiffening strip is not more than the length of the suction cylinder skirt, the width of the cylinder inner stiffening strip is 50 mm-500 mm, and the distance between adjacent cylinder inner stiffening strips 1 is 500 mm-3000 mm.
Preferably, the bottom of the stiffening strip in the cylinder is provided with a drag reduction cone, and the width of the top of the stiffening strip is equal to that of the drainage strip.
Preferably, the cylinder inner stiffening strip and the drainage strip are made of channel steel or angle steel.
Preferably, the soil retaining layer is soil retaining fabric or a grid.
The beneficial effects obtained by the invention are as follows: the reinforcing device is welded on the inner wall of the suction tube, has higher rigidity, can replace a stiffening rib plate in the suction tube foundation and reinforce the structural rigidity of the main body of the suction tube foundation; the reinforcing device is internally filled with a drainage layer (geotextile or drainage particulate matter), so that free water contained in the soil body in the cylinder can be drained through the seepage of the advantages of the travel of the geotextile or the drainage particulate matter, and the consolidation rate of the soil body in 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 body in the cylinder is greatly shortened, and the drainage efficiency of the soil body in the cylinder is effectively improved; after the soil body in the cylinder 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 cylinder are both beneficially affected by the verification, and higher safe storage is provided for safe operation of the suction cylinder foundation.
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 are bearing capacity variation graphs of soil body reinforcement working conditions in the cylinder.
Reference numerals: 1. a stiffening bar; 2. a drainage strip; 3. a soil blocking layer; 4. a drainage layer; 5. a drain hole; 11. a side hole; 12. a drag reduction cone; 51. a water blocking bolt; 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 to 9, the soil body reinforcing device in the suction tube of the offshore wind power of the invention is welded on the inner wall of the suction tube 10, has high rigidity, and can replace a stiffening rib plate in the suction tube foundation to strengthen the rigidity of the main structure of the suction tube foundation. The reinforcing devices are uniformly distributed along the wall of the suction tube 10 and are distributed from the mud surface to the bottom of the suction tube, so that the consolidation drainage path of the soil in the suction tube is greatly shortened, and the drainage efficiency of the soil in the suction tube is effectively improved; after the soil body in the cylinder 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 cylinder are both beneficially affected by the verification, and higher safe storage is provided for safe operation of the suction cylinder foundation.
This reinforcing apparatus includes a section of thick bamboo interior stiffening strip 1, water drainage strip 2, keeps off soil layer 3, water drainage layer 4 and wash port 5, and a section of thick bamboo interior stiffening strip 1 welds in 10 inner walls of a suction section of thick bamboo, along section of thick bamboo wall evenly distributed, is 500mm ~ 3000mm along a section of thick bamboo week interval (the interval between the stiffening strip 1 in the adjacent section of thick bamboo promptly), and a section of thick bamboo interior stiffening strip 1 length is not more than a suction section of thick bamboo skirt 30 length, and the width is 50mm ~ 500 mm.
Referring to fig. 8 and 9, the sidewall of the stiffening bar 1 in the cylinder is provided with a side hole 11 (or a side groove) for discharging the water in the soil in 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 cylinder is a 12-shaped drag reduction cone, which is beneficial to breaking the ground and reducing drag in the installation process of the suction cylinder 10; the top of the stiffening strip 1 in the cylinder is as wide as the drainage strip 2.
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; the soil blocking layer 3 is arranged on the inner wall of the cylinder inner stiffening strip 1, has the same width and length as the inner side wall of the cylinder inner stiffening strip 1, and has the thickness of 2 mm-20 mm; the drainage layer 4 is filled in the drainage channel, in the embodiment, the drainage layer 4 is drainage fabric or particles, the particle size of the drainage particles is 0.75 mm-10 mm, free water contained in the soil body in 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 body in the cylinder is accelerated.
The drain hole 5 is arranged on the suction cylinder top cover 20 and penetrates through the upper surface of the drain strip 2, the drain hole 5 and the suction cylinder negative pressure pumping hole are integrated or independently arranged, and the aperture is 10 mm-500 mm. The water blocking bolt 51 is arranged in the drain hole 5, 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 51 is removed after the suction cylinder 10 is installed in place, so that soil in the cylinder is reinforced.
In this embodiment, the reinforcing bars 1 and the drainage bars 2 in the cylinder are made of channel steel or angle steel, and the soil retaining layer 3 is a soil retaining fabric or grid.
As shown in fig. 1 and 2, the soil body reinforcing device in the offshore wind power suction cylinder is provided with 16 internal stiffening bars 1, the suction cylinder 10 shown in the embodiment is of a steel structure without a branch bin, the internal stiffening bars 1 and the drainage bars 2 are made of channel steel and are welded on the inner wall of the suction cylinder skirt 30 and the lower part of the suction cylinder top cover respectively, the wall thickness of the channel steel is 10mm, the width of the channel steel is 200mm, the length of the internal stiffening bars 1 is 9600mm, and the length of the drainage bars 2 is 5500 mm. In the implementation, the soil retaining layer 3 is made of a geotextile with the thickness of 5mm and is embedded in the cylinder stiffening strip 1. The inside of a drainage channel which is communicated with the internal stiffening strip 1 and the drainage strip 2 is filled with sand particles with the particle size of 5mm for drainage. The drain hole 5 is communicated with the suction barrel negative pressure mounting hole, the aperture of the drain hole 5 is 200mm, a water blocking bolt 51 is arranged in the drain hole, the outer diameter of the water blocking bolt 51 is 200mm, and the inner diameter of the water blocking bolt is 180 mm.
The reinforcing device is welded on the inner wall of the suction tube 10, has higher rigidity, and strengthens the rigidity of the main structure of the suction tube type foundation; the reinforcing device is filled with drainage fabrics or particles, free water contained in the soil body in the cylinder can be drained through the advantage seepage of the travel of the drainage fabrics or the particles, and the consolidation rate of the soil body in 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 body in the cylinder is greatly shortened, and the drainage efficiency of the soil body in the cylinder is effectively improved; after the soil body in 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 10.52 percent and 27.56 percent, as shown in figures 10-11, the reinforcing device greatly improves the bearing capacity of the suction cylinder, and under the same load combination, the suction cylinder with the structure can reduce the design engineering amount by 5 percent and save the foundation cost by 5 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 (7)
1. The utility model provides a soil body reinforcing apparatus in marine wind power suction section of thick bamboo welds on a suction section of thick bamboo (10) inner wall, its characterized in that: the suction tube comprises an inner tube stiffening strip (1), a drainage strip (2), a soil retaining layer (3), a drainage layer (4) and drainage holes (5), 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 drainage strips (2) are welded at the bottom of the top cover (20) of the suction cylinder and are distributed radially outwards by taking the central axis of the suction cylinder as an 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; the soil blocking layer (3) is arranged on the inner wall of the stiffening strip (1) in the cylinder, and the drainage layer (4) is filled in the drainage channel; the drain hole (5) is arranged on the suction cylinder top cover (20) and penetrates through the upper surface of the drain strip (2);
the side wall of the stiffening bar (1) in the cylinder is provided with a side hole (11) for discharging water of soil in the cylinder and accelerating soil consolidation, and the aperture of the side hole (11) is 10-200 mm; the drain hole (5) and the suction barrel negative pressure pumping hole are integrated or independently arranged, and the aperture is 10-500 mm.
2. The offshore wind power suction drum inner soil body reinforcing device according to claim 1, characterized in that: the soil blocking layer (3) and the inner side wall of the stiffening strip (1) in the cylinder are equal in width and length, and the thickness is 2 mm-20 mm.
3. The offshore wind power suction drum inner soil body reinforcing device according to claim 1, characterized in that: the drainage layer (4) is drainage fabric or particles, and the particle size of the drainage particles is 0.75-10 mm.
4. The offshore wind power suction drum inner soil body reinforcing device according to claim 1, characterized in that: the length of the cylinder inner stiffening strips (1) is not more than the length of the suction cylinder skirt (30), the width of the cylinder inner stiffening strips is 50 mm-500 mm, and the distance between every two adjacent cylinder inner stiffening strips (1) is 500 mm-3000 mm.
5. The offshore wind power suction drum inner soil body reinforcing device according to claim 1, characterized in that: the bottom of the cylinder inner stiffening strip (1) is provided with a drag reduction cone (12), and the width of the top of the cylinder inner stiffening strip is equal to that of the drainage strip (2).
6. The offshore wind power suction drum inner soil body reinforcing device according to claim 1, characterized in that: the cylinder internal stiffening strip (1) and the drainage strip (2) are made of channel steel or angle steel.
7. The offshore wind power suction drum inner soil body reinforcing device according to claim 1, characterized in that: the soil blocking layer (3) is made of soil blocking fabric or grating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110077401.7A CN112900471A (en) | 2021-01-20 | 2021-01-20 | Soil body reinforcing device in offshore wind power suction barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110077401.7A CN112900471A (en) | 2021-01-20 | 2021-01-20 | Soil body reinforcing device in offshore wind power suction barrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112900471A true CN112900471A (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110077401.7A Pending CN112900471A (en) | 2021-01-20 | 2021-01-20 | Soil body reinforcing device in offshore wind power suction barrel |
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| CN (1) | CN112900471A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113152546A (en) * | 2021-05-19 | 2021-07-23 | 长江勘测规划设计研究有限责任公司 | Offshore wind power suction barrel periphery soil body reinforcing device |
| CN113152545A (en) * | 2021-05-19 | 2021-07-23 | 长江勘测规划设计研究有限责任公司 | Outer soil body reinforcing device of offshore wind power suction barrel |
Citations (4)
| 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 |
| CN203082381U (en) * | 2012-12-26 | 2013-07-24 | 中国水电顾问集团华东勘测设计研究院 | Steel pressure pipe with functions of steel pipe stiffening ring and wall-attaching outer drainage |
| EP3444403A1 (en) * | 2017-08-17 | 2019-02-20 | Siemens Gamesa Renewable Energy A/S | Segmented suction bucket |
| 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 |
-
2021
- 2021-01-20 CN CN202110077401.7A patent/CN112900471A/en active Pending
Patent Citations (4)
| 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 |
| CN203082381U (en) * | 2012-12-26 | 2013-07-24 | 中国水电顾问集团华东勘测设计研究院 | Steel pressure pipe with functions of steel pipe stiffening ring and wall-attaching outer drainage |
| EP3444403A1 (en) * | 2017-08-17 | 2019-02-20 | Siemens Gamesa Renewable Energy A/S | Segmented suction bucket |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113152546A (en) * | 2021-05-19 | 2021-07-23 | 长江勘测规划设计研究有限责任公司 | Offshore wind power suction barrel periphery soil body reinforcing device |
| CN113152545A (en) * | 2021-05-19 | 2021-07-23 | 长江勘测规划设计研究有限责任公司 | Outer soil body reinforcing device of offshore wind power suction barrel |
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Application publication date: 20210604 |
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