CN116607556B - Flexible anti-scouring method and protection system for offshore wind power foundation in operation and maintenance period - Google Patents
Flexible anti-scouring method and protection system for offshore wind power foundation in operation and maintenance period Download PDFInfo
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- CN116607556B CN116607556B CN202310884695.3A CN202310884695A CN116607556B CN 116607556 B CN116607556 B CN 116607556B CN 202310884695 A CN202310884695 A CN 202310884695A CN 116607556 B CN116607556 B CN 116607556B
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- 238000009991 scouring Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012423 maintenance Methods 0.000 title claims abstract description 19
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 42
- 238000007789 sealing Methods 0.000 claims description 42
- 238000007667 floating Methods 0.000 claims description 21
- 238000005096 rolling process Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000010248 power generation Methods 0.000 claims 4
- 230000002787 reinforcement Effects 0.000 claims 2
- 230000002265 prevention Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000000178 monomer Substances 0.000 description 6
- 239000004575 stone Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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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
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
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- Foundations (AREA)
Abstract
The invention relates to the technical field of offshore wind power engineering, in particular to a flexible anti-scour method for an offshore wind power foundation in an operation and maintenance period, which is realized by a flexible anti-scour protection system, wherein the flexible anti-scour protection system comprises a flexible mould bag, the flexible mould bag is provided with a grouting cavity, and the upper surface of the flexible mould bag is provided with a first grouting opening; the anti-scouring method comprises the following steps: step one, encircling a flexible mould bag on the outer circumferential surface of a wind power foundation along the circumferential direction of the wind power foundation; step two, connecting a first grouting port and a grouting ship through a pipeline; sinking the flexible mould bags to the seabed along the length direction of the wind power foundation; and fourthly, grouting the grouting cavity on the sea level through a pipeline, and expanding and pressing the flexible mould bags on the seabed positioned at the bottom of the wind power foundation in a grouting state. The invention also relates to a flexible scour prevention protection system for the offshore wind power foundation in the operation and maintenance period.
Description
Technical Field
The invention relates to the technical field of offshore wind power engineering, in particular to a flexible anti-scouring method for an operation and maintenance period of an offshore wind power foundation. The invention also relates to a flexible scour prevention protection system for the offshore wind power foundation in the operation and maintenance period.
Background
The anti-scouring problem is a difficult problem of offshore wind power foundations, and currently, offshore wind power foundations in China, such as single pile, multi-pile, barrel-type foundations and the like, mainly adopt stone throwing operation for anti-scouring protection. However, according to the monitoring result, the anti-scouring effect of the stone throwing anti-scouring on the foundation is limited, and particularly in sandy geology, uneven stone throwing can aggravate scouring. In addition, the current anti-scour construction measures are generally carried out in a design stage, and after the construction is finished, the scour of the foundation can continuously occur, the anti-scour protection in the design stage is not permanent, and the anti-scour protection is required to be added to the foundation during the operation.
Chinese patent CN110593325a discloses an anti-scour structure and an anti-scour method for an offshore wind power foundation curtain, comprising an anti-scour curtain arranged around a wind power foundation, wherein the anti-scour curtain covers the wind power foundation protection range and is embedded under a soil body within the wind power foundation protection range; the anti-scouring curtain consists of a plurality of curtain monomers, the curtain monomers are sequentially distributed along the circumferential direction of the wind power foundation, and two adjacent curtain monomers are mutually overlapped at the edges of the curtain monomers; the inner side of each curtain monomer is fixedly connected to the wind power foundation through a curtain tensioning device, the outer side of each curtain monomer is fixedly connected to a simple pile through the curtain tensioning device, and the simple piles are fixed to the seabed.
According to the anti-scouring method, the curtain is stretched on the seabed, however, seawater is extremely corroded on the curtain and is influenced by ocean currents, simple piles for fixing corners of the curtain wall are extremely easy to separate from the seabed, workers are required to submerge the seabed for construction, and construction difficulty is high.
Disclosure of Invention
According to the flexible anti-scouring method for the offshore wind power foundation in the operation and maintenance period, the flexible mould bags with the grouting cavities encircle the wind power foundation on the sea surface, concrete is injected into the flexible mould bags sunk into the sea surface after the flexible mould bags sink into the sea surface, the flexible mould bags are paved on the sea surface, scouring of the wind power foundation can be prevented after the concrete is solidified, and the problems that the conventional anti-scouring method is poor in effect and difficult to construct are solved.
In order to solve the problems in the prior art, the invention provides a flexible anti-scour method for an offshore wind power foundation in an operation and maintenance period, which is realized by a flexible anti-scour protection system, wherein the flexible anti-scour protection system comprises a flexible mould bag extending along the circumferential direction of the wind power foundation, the flexible mould bag is provided with a grouting cavity, and the upper surface of the flexible mould bag is provided with a first grouting port communicated with the grouting cavity; the anti-scouring method comprises the following steps:
step one, encircling a flexible mould bag on the outer circumferential surface of a wind power foundation along the circumferential direction of the wind power foundation; before the flexible mould bags encircle the wind power foundation, one end of the flexible mould bags are fixed, then the other end of the flexible mould bags are connected with the unmanned remote control ship, and the unmanned remote control ship is started to encircle the flexible mould bags for one circle; the flexible anti-scouring protection system further comprises a first sealing mechanism and a second sealing mechanism, wherein the first sealing mechanism is arranged between the flexible mould bag and the outer circumferential surface of the wind power foundation, and the second sealing mechanism is arranged at the connecting end of the flexible mould bag after surrounding the wind power foundation;
step two, connecting a first grouting port and a grouting ship through a pipeline;
sinking the flexible mould bags to the seabed along the length direction of the wind power foundation;
grouting the grouting cavity on the sea level through a pipeline, and expanding and pressing the flexible mold bags on the seabed at the bottom of the wind power foundation in a grouting state;
the flexible die bag is unfolded to be in a fan-shaped ring shape, and a tightening rope is arranged on the inner circle of the flexible die bag;
the first sealing mechanism comprises a rubber pad, a second connecting rope, rollers and a limiting rod, the rubber pad is arranged in the inner circle of the flexible die bag along the circumferential direction, a positioning groove along the length direction of the rubber pad is formed in the inner side of the rubber pad, a second limiting block is arranged in the positioning groove, a V-shaped groove is formed in the outer side of the second limiting block, the second connecting rope is arranged in the positioning groove along the length direction of the rubber pad, the second connecting rope is abutted in the V-shaped groove, the limiting rod penetrates through the V-shaped groove along the vertical direction, the second connecting rope is located between the tip of the V-shaped groove and the limiting rod, the rollers are rotationally arranged on the second connecting rope, the rollers are located between the two second limiting blocks, the flexible die bag is in rolling fit with the outer circumferential surface of the wind power foundation through the rollers, the second connecting rope is enabled to cut off the tip of the V-shaped groove after grouting in the flexible die bag, and the rollers move to the inner side of the positioning groove.
Preferably, before the first step, completing land prefabrication of the flexible mould bags according to the perimeter of the wind power foundation, and folding the flexible mould bags; the flexible scour protection system still includes first go-between, second go-between, floater, first connecting rope, first stopper and coupling hook, first go-between sets up along circumference the outside of flexible mould bag, the second go-between with the floater is connected, the one end of first connecting rope passes behind the first go-between with first stopper is connected, the other end of first connecting rope is connected with the second go-between, and the coupling hook has the linkage segment and sets up the first portion of colluding and the second portion of colluding at the linkage segment both ends.
Preferably, when the flexible mould bag surrounds the wind power foundation, the first hook part penetrates through the first connecting ring, the second hook part penetrates through the second connecting ring, and the flexible mould bag floats on the sea surface under the buoyancy action of the floating ball; when the flexible mould bag sinks, the first hook part is pulled away from the first connecting ring, and the second hook part is pulled away from the second connecting ring.
Preferably, before the flexible mould bags encircle the wind power foundation, the seabed at the bottom of the wind power foundation is leveled by means of a riprap or/and a sand throwing bag.
Preferably, a net-shaped reinforced pipeline is sewn in the flexible mold bag and penetrates through the flexible mold bag, and a second grouting port is formed in the inner side of the net-shaped reinforced pipeline.
Preferably, the two ends of the flexible die bag are provided with an embedded groove and an embedded strip which can be mutually coupled in an unfolding state, the second sealing mechanism comprises a first connecting piece, a second connecting piece and a third connecting rope, the first connecting piece and the second connecting piece are radially arranged at the top end of the flexible die bag along the flexible die bag after being unfolded, rope penetrating openings are formed in the first connecting piece and the second connecting piece, and the third connecting rope sequentially penetrates through the rope penetrating openings to connect the first connecting piece and the second connecting piece.
The invention also relates to a flexible anti-scour protection system for the operation and maintenance period of the offshore wind power foundation, which comprises a flexible mould bag, a first sealing mechanism, a second sealing mechanism, a first connecting ring, a second connecting ring, a floating ball, a first connecting rope, a first limiting block and a connecting hook, wherein the flexible mould bag extends along the circumferential direction of the wind power foundation, the flexible mould bag is provided with a grouting cavity, and the upper surface of the flexible mould bag is provided with a first grouting port communicated with the grouting cavity; the first sealing mechanism is arranged between the flexible mould bag and the outer circumferential surface of the wind power foundation, and the second sealing mechanism is arranged at the connecting end of the flexible mould bag after surrounding the wind power foundation; the first connecting ring is circumferentially arranged at the outer side of the flexible die bag, the second connecting ring is connected with the floating ball, the first connecting rope penetrates through the first connecting ring and then is connected with the first limiting block, the connecting hook is provided with a connecting section, a first hook part and a second hook part which are arranged at two ends of the connecting section, the other end of the first connecting rope is connected with the second connecting ring, the flexible die bag is unfolded to be in a fan-shaped shape, and the inner circle of the flexible die bag is provided with a tightening rope; the first sealing mechanism comprises a rubber pad, a second connecting rope, rollers and a limiting rod, the rubber pad is arranged in the inner circle of the flexible die bag along the circumferential direction, a positioning groove along the length direction of the rubber pad is formed in the inner side of the rubber pad, a second limiting block is arranged in the positioning groove, a V-shaped groove is formed in the outer side of the second limiting block, the second connecting rope is arranged in the positioning groove along the length direction of the rubber pad, the second connecting rope is abutted in the V-shaped groove, the limiting rod vertically penetrates through the V-shaped groove, the second connecting rope is located between the tip of the V-shaped groove and the limiting rod, the rollers are rotatably arranged on the second connecting rope, the rollers are located between the two second limiting blocks, the flexible die bag is in rolling fit with the outer circumferential surface of the wind power foundation through the rollers after surrounding the wind power foundation, the second connecting rope is inflated after grouting in the flexible die bag, so that the second connecting rope cuts off the tip of the V-shaped groove, and the rollers move to the inner side of the positioning groove.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the flexible mould bags with the grouting cavities surround the wind power foundation on the sea surface, after the flexible mould bags are sunk into the sea bottom, concrete is injected into the flexible mould bags sunk into the sea bottom on the sea surface, so that the flexible mould bags are paved on the sea bottom, the wind power foundation can be prevented from being scoured after the concrete is solidified, and the problems of poor effect and difficult construction of the traditional scour prevention method are solved;
2. according to the invention, the rubber pad, the second connecting rope, the roller and the limiting rod can be in rolling fit with the wind power foundation before the flexible die bag expands, so that the problem that the flexible die bag cannot sink due to overlarge friction force between the inner circumferential surface of the flexible die bag and the wind power foundation can be prevented.
Drawings
FIG. 1 is a schematic diagram of a flexible scour protection system at sea level for an operation and maintenance phase of an offshore wind farm foundation.
Fig. 2 is a partial enlarged view at a of fig. 1.
Figure 3 is a schematic diagram of a flexible scour protection system on the seabed during operation of an offshore wind foundation.
Fig. 4 is a partial enlarged view at B of fig. 3.
FIG. 5 is a schematic illustration of a flexible mold bag of the flexible anti-scour protection system during operation of an offshore wind farm foundation while surrounding the wind farm foundation.
FIG. 6 is a schematic view of a flexible mold bag of the flexible anti-scour protection system during operation of an offshore wind farm foundation after surrounding the wind farm foundation.
FIG. 7 is a schematic diagram of a flexible mold bag in a flexible scour protection system for an offshore wind power foundation during operation and maintenance after deployment on the seabed.
FIG. 8 is a perspective view of a second seal mechanism in a flexible anti-scour protection system for an offshore wind farm foundation during operation.
Fig. 9 is an exploded perspective view of a second seal mechanism in a flexible anti-scour protection system for an offshore wind farm foundation during operation.
Fig. 10 is a perspective view of a first seal mechanism in a flexible anti-scour protection system for an offshore wind farm foundation during operation.
Fig. 11 is an exploded perspective view of a first seal mechanism in a flexible anti-scour protection system for an offshore wind farm foundation during operation.
The reference numerals in the figures are: 1-a flexible mould bag; 11-a first grouting port; 12-net-shaped reinforced pipelines; 121-a second grouting port; 13-a fitting groove; 14-a chimeric strip; 2-a first sealing mechanism; 21-a rubber pad; 211-a placement groove; 212-a second limiting block; 2121-V-groove; 22-a second connecting rope; 23-rolling wheels; 24-limiting rods; 3-a second sealing mechanism; 31-a first connector; 32-a second connector; 33-a third connecting rope; 41-a first connection ring; 42-a second connecting ring; 43-floating ball; 44-a first connecting rope; 45-a first limiting block; 46, connecting hooks; 47-balancing weight; 5-unmanned remote control ship.
Description of the embodiments
The invention will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the invention and the specific objects and functions achieved.
As shown in fig. 1 and 3, the present invention provides:
the flexible anti-scour method for the operation and maintenance period of the offshore wind power foundation is realized by a flexible anti-scour protection system, the flexible anti-scour protection system comprises a flexible mould bag 1 extending along the circumferential direction of the wind power foundation, the flexible mould bag 1 is provided with a grouting cavity, and the upper surface of the flexible mould bag 1 is provided with a first grouting port 11 communicated with the grouting cavity; the anti-scouring method comprises the following steps:
the method comprises the steps that firstly, a flexible mold bag 1 surrounds the outer circumferential surface of a wind power foundation along the circumferential direction of the wind power foundation; step two, connecting the first grouting port 11 with a grouting ship through a pipeline; sinking the flexible mould bags 1 to the seabed along the length direction of the wind power foundation; and fourthly, grouting the grouting cavity on the sea level through a pipeline, and expanding and pressing the flexible die bag 1 on the seabed positioned at the bottom of the wind power foundation in the grouting state.
The upper surface of the flexible mould bag 1 is also provided with a counterweight 47, the counterweight 47 can be small lead balls or small lead blocks, and is uniformly arranged on the mould bag, so that the mould bag can be ensured to be sunk to the sea bottom, and the counterweight 47 is arranged on the upper surface of the mould bag, so that the resistance in the dragging process of the mould bag is reduced.
When the construction process is carried out, the method mainly comprises the following steps:
the flexible mould bags 1 are prefabricated on land, the required flexible mould bags 1 are designed through the perimeter of the wind power foundation, the prepared flexible mould bags 1 are folded to reduce the volume of the flexible mould bags, the flexible mould bags 1 are convenient to transport, the floating balls 43 are tied at the outer edges of the flexible mould bags 1, the flexible mould bags 1 can float on the sea surface, the floating balls 43 are arranged at the first grouting openings 11, so that the flexible mould bags 1 can be conveniently found when grouting is carried out, and the flexible mould bags 1 are hoisted on a ship after preparation is completed.
For existing machine positions with larger flushing, the foundation can be basically leveled by methods such as stone polishing, sand polishing bags and the like, so that the subsequent mould bags can be conveniently unfolded.
After the transport ship is in place, the flexible die bags 1 are thrown into the sea, the floating balls 43 of the flexible die bags 1 float on the sea surface under the action of the floating balls, meanwhile, the flexible die bags 1 are wound on the surface of the wind power foundation, two ends of the flexible die bags 1 are connected, ropes between the floating balls 43 and the flexible die bags 1 are untied, and the flexible die bags 1 naturally sink into the sea under the action of self weight and the counter weights 47.
Grouting is carried out on the grouting cavity through a pipeline on the sea level, the flexible mould bag 1 is unfolded in the grouting state and is pressed on the seabed at the bottom of the wind power foundation, and the concrete in the flexible mould bag 1 is gradually solidified, so that the scouring of the wind power foundation can be prevented.
According to the embodiment, the flexible mould bags 1 with the grouting cavities encircle a wind power foundation on the sea surface, after the flexible mould bags 1 are sunk into the sea bottom, concrete is injected into the flexible mould bags 1 sunk into the sea bottom on the sea surface, so that the flexible mould bags 1 are paved on the sea bottom, the wind power foundation can be prevented from being scoured after the concrete is solidified, and the problems of poor effect and difficult construction of an existing scour prevention method are solved.
In the first step, as shown in fig. 5 and 6, before the flexible mold bag 1 surrounds the wind power foundation, one end of the flexible mold bag 1 is fixed, then the other end of the flexible mold bag 1 is connected with the unmanned remote control ship 5, and the unmanned remote control ship 5 is started to surround the flexible mold bag 1 around the wind power foundation for a circle; the flexible anti-scouring protection system further comprises a first sealing mechanism 2 and a second sealing mechanism 3, wherein the first sealing mechanism 2 is arranged between the flexible die bag 1 and the outer circumferential surface of the wind power foundation, and the second sealing mechanism 3 is arranged at the connecting end of the flexible die bag 1 after surrounding the wind power foundation.
Because the diameter of wind power basis is great, it is very inconvenient to encircle by manual traction, and efficiency is lower, therefore when encircleing wind power basis with flexible mould bag 1, when throwing into the sea with flexible mould bag 1, the one end of flexible mould bag 1 still is fixed with the transport ship, and link to each other with the other end of flexible mould bag 1 and unmanned remote control ship 5, can control unmanned remote control ship 5 and encircle the wind power basis and be close to the transport ship after a week on the transport ship, throw into the sea after connecting the both ends of flexible mould bag 1, take off the floater 43 of flexible mould bag 1 week side for flexible mould bag 1 sinks and tiling on the seabed after the grout.
After the flexible mould bag 1 surrounds the wind power foundation, a first sealing mechanism 2 which can be in sealing fit with the outer circumferential surface of the wind power foundation is arranged on the inner side of the flexible mould bag 1, and after the flexible mould bag 1 surrounds the wind power foundation, the flexible mould bag 1 can be sealed through a second sealing mechanism 3, so that the flexible mould bag 1 is in a complete sealing ring shape.
The first sealing mechanism 2 can be a first velvet edge which is arranged on the inner circle side of the flexible die bag 1, plays a sealing role between the flexible die bag 1 and the wind power foundation structure, and reduces scouring caused by pores between the flexible die bag 1 and the wind power foundation structure; the second sealing mechanism 3 can be second velvet edges which are arranged on two annular side edges of the mould bag fan and play a role in sealing the two overlapping edges, so that scouring caused by uneven overlapping edges of the flexible mould bag 1 is reduced.
As shown in fig. 1 and 3, before the first step, the flexible mould bags 1 are prefabricated on land according to the perimeter of the wind power foundation, and the flexible mould bags 1 are folded; the flexible scour protection system further comprises a first connecting ring 41, a second connecting ring 42, a floating ball 43, a first connecting rope 44, a first limiting block 45 and a connecting hook 46, wherein the first connecting ring 41 is circumferentially arranged on the outer side of the flexible die bag 1, the connecting ring is connected with the floating ball 43, one end of the first connecting rope 44 penetrates through the first connecting ring 41 and then is connected with the first limiting block 45, the other end of the first connecting rope 44 is connected with the second connecting ring 42, and the connecting hook 46 is provided with a connecting section, and a first hook part and a second hook part which are arranged at two ends of the connecting section.
When the folded flexible die bag 1 is required to float on the sea, the first connecting ring 41 and the second connecting ring 42 are connected through the connecting hooks 46, so that the connecting distance between the floating ball 43 and the flexible die bag 1 is short, and the flexible die bag 1 can float on the sea.
When the flexible mold bag 1 needs to be sunk into the seabed, the first hook part of the connecting hook 46 is pulled away from the first connecting ring 41, or the second hook part of the connecting hook 46 is pulled away from the second connecting ring 42, so that no connecting acting force exists between the first connecting ring 41 and the second connecting ring 42, the floating ball 43 floats on the sea surface, the first connecting ring 41 slides in the first connecting rope 44, the flexible mold bag 1 is sunk into the seabed, grouting is performed after the folded flexible mold bag 1 is unfolded on the seabed, the floating ball 43 is pulled away from the wind power foundation on the sea surface, and the folded flexible mold bag 1 is gradually pulled and unfolded by the first connecting rope 44 due to the fact that the first limiting block 45 can prevent the separation of the first connecting rope 44 and the first connecting ring 41, and then concrete is injected into the flexible mold bag 1.
As shown in fig. 1 and 3, when the flexible mold bag 1 surrounds the wind power foundation, the first hook portion passes through the first connecting ring 41, the second hook portion passes through the second connecting ring 42, and the flexible mold bag 1 floats on the sea surface under the buoyancy action of the floating ball 43; when the flexible mould bag 1 is sunk, the first hook part is pulled away from the first connecting ring 41, and the second hook part is pulled away from the second connecting ring 42.
One end of the first hook part and one end of the second hook part are welded or integrally formed with two ends of the connecting section, the included angles between the first hook part and the connecting section and between the second hook part and the connecting section are smaller than ninety degrees, the first hook part is inserted into the first connecting ring 41, the second hook part is inserted into the second connecting ring 42, the first connecting ring 41 is subjected to downward acting force on the first hook part by the gravity of the flexible die bag 1, the second connecting ring 42 is subjected to upward acting force on the second hook part by the buoyancy of the floating ball 43, the first connecting ring 41 is clamped at the included angle between the first hook part and the connecting section, and the second connecting ring 42 is clamped at the included angle between the second hook part and the connecting section.
As shown in fig. 3, before the flexible mould bags 1 encircle the wind power foundation, the seabed at the bottom of the wind power foundation is leveled by means of a riprap or/and a sand throwing bag.
The seabed is pre-leveled in a stone throwing or/and sand throwing bag mode, so that the flexible mould bag 1 can be paved on a flat seabed, and further scouring of a wind power foundation is prevented.
As shown in fig. 7, the inside of the flexible mold bag 1 is sewed with a mesh reinforced pipe 12 and is penetrated inside and outside, and a second grouting port 121 is provided inside the mesh reinforced pipe 12.
The second grouting openings 121 can be used for injecting concrete into the flexible mold bags 1, so that the flexible mold bags 1 can be gradually unfolded under the action of the concrete, meanwhile, the gap between the flexible mold bags 1 and the seabed can be reduced due to the fact that the flexible mold bags 1 can be self-adaptively rugged seabed, and the anti-scouring effect is further improved.
As shown in fig. 7, the flexible mold bag 1 is unfolded to be in a fan-shaped ring shape, and the inner circle of the flexible mold bag 1 is provided with a tightening rope.
After the flexible mould bags 1 are unfolded on the seabed, the tightening ropes are tensioned, the gap between the flexible mould bags 1 and the wind power foundation is reduced, and the anti-scouring effect is improved.
As shown in fig. 2, 4, 10 and 11, the first sealing mechanism 2 comprises a rubber pad 21, a second connecting rope 22, a roller 23 and a limiting rod 24, the rubber pad 21 is circumferentially arranged on the inner circle of the flexible mold bag 1, a positioning groove 211 along the length direction of the rubber pad 21 is formed in the inner side of the rubber pad 21, a second limiting block 212 is arranged in the positioning groove 211, a V-shaped groove 2121 is formed in the outer side of the second limiting block 212, the second connecting rope 22 is arranged in the positioning groove 211 along the length direction of the rubber pad 21, the second connecting rope 22 abuts against the V-shaped groove 2121, the limiting rod 24 vertically penetrates through the V-shaped groove 2121, the second connecting rope 22 is located between the V-shaped groove 2121 and the limiting rod 24, the roller 23 is rotationally arranged on the second connecting rope 22, the roller 23 is located between the two second limiting blocks 212, the flexible mold 1 is in rolling fit with the outer circumferential surface of the roller wheel 2121 around the foundation, and the tip portion of the flexible mold bag 21 is connected with the tip portion of the flexible mold bag 2121 in a rolling mode, and the tip portion of the flexible mold bag 23 is connected to the V-shaped groove 211 after the tip portion of the flexible mold bag is moved to the tip portion of the V-shaped groove 2121.
Before the flexible mould bag 1 is not injected with concrete, the second connecting rope 22 is abutted in the V-shaped groove 2121 of the second limiting block 212 under the constraint action of the limiting rod 24, the rubber pad 21 surrounds the outer side of the wind power foundation, meanwhile, the roller 23 is abutted on the circumferential surface of the wind power foundation, the axis of the roller 23 is horizontal, when the flexible mould bag 1 sinks, the rubber pad 21 and the wind power foundation are in rolling fit through the roller 23, so that the friction force between the rubber pad 21 and the wind power foundation is reduced, the flexible mould bag 1 is facilitated to sink, and the situation that the flexible mould bag 1 cannot sink due to overlarge friction force between the inner circumferential surface of the flexible mould bag 1 and the wind power foundation is prevented.
After the flexible mould bag 1 is paved on the seabed, grouting is carried out in the flexible mould bag 1, the flexible mould bag 1 is gradually expanded, and then the inner circle of the flexible mould bag is expanded, the tip of the V-shaped groove 2121 is easier to break compared with other parts, under the action of reaction force, the second connecting rope 22 breaks through the V-shaped groove 2121 and presses the tip of the V-shaped groove 2121, so that the part, which is not provided with the placement groove 211, of the inner side of the rubber pad 21 is tightly attached to the circumferential surface of the wind power foundation, the gap between the flexible mould bag 1 and the wind power foundation is reduced, and the anti-scouring capability is further improved.
As shown in fig. 1 and 2, in the contracted state of the flexible mold bag 1, the inner diameter of the flexible mold bag 1 is slightly larger than the diameter of the wind power foundation, so that a gap exists between the inner side of the rubber pad 21 and the outer wall of the wind power foundation, and the flexible mold bag 1 can slide on the wind power foundation through the rollers 23.
As shown in fig. 8 and 9, two ends of the flexible mold bag 1 are provided with a fitting groove 13 and a fitting strip 14 which can be mutually coupled in an unfolded state, the second sealing mechanism 3 comprises a first connecting piece 31, a second connecting piece 32 and a third connecting rope 33, the first connecting piece 31 and the second connecting piece 32 are radially arranged at the top end of the flexible mold bag 1 along the unfolded flexible mold bag 1, rope penetrating openings are formed in the first connecting piece 31 and the second connecting piece 32, and the third connecting rope 33 sequentially penetrates through the rope penetrating openings to connect the first connecting piece 31 and the second connecting piece 32.
When the end part of the flexible die bag 1 needs to be connected on the sea surface, the first connecting piece 31 and the second connecting piece 32 can be tightly connected through the third connection, the flexible die bag 1 is sunk into the sea bottom and after the flexible die bag 1 is expanded, the embedded grooves 13 and the embedded strips 14 at the two ends of the flexible die bag 1 can be naturally coupled, and then the gap of the connecting end of the flexible die bag 1 can be reduced, and scouring caused by uneven lapping of the flexible die bag 1 is reduced.
As shown in fig. 1, 3, 5, 6 and 7, the flexible anti-scour protection system for the operation and maintenance period of the offshore wind power foundation comprises a flexible mold bag 1, a first sealing mechanism 2, a second sealing mechanism 3, a first connecting ring 41, a second connecting ring 42, a floating ball 43, a first connecting rope 44, a first limiting block 45 and a connecting hook 46, wherein the flexible mold bag 1 extends along the circumferential direction of the wind power foundation, the flexible mold bag 1 is provided with a grouting cavity, and the upper surface of the flexible mold bag 1 is provided with a first grouting opening 11 communicated with the grouting cavity; the first sealing mechanism 2 is arranged between the flexible die bag 1 and the outer circumferential surface of the wind power foundation, and the second sealing mechanism 3 is arranged at the connecting end of the flexible die bag 1 surrounding the wind power foundation; the first connecting ring 41 is circumferentially arranged at the outer side of the flexible mold bag 1, the connecting ring is connected with the floating ball 43, the first connecting rope 44 passes through the first connecting ring 41 and then is connected with the first connecting ring 41 and the first limiting block 45, and the connecting hook 46 is provided with a connecting section, and a first hook part and a second hook part which are arranged at two ends of the connecting section.
The foregoing examples merely illustrate one or more embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (7)
1. The flexible anti-scour method for the operation and maintenance period of the offshore wind power foundation is characterized in that the flexible anti-scour protection system comprises a flexible mould bag (1) extending along the circumferential direction of the wind power foundation, the flexible mould bag (1) is provided with a grouting cavity, and the upper surface of the flexible mould bag (1) is provided with a first grouting port (11) communicated with the grouting cavity; the anti-scouring method comprises the following steps:
the method comprises the steps that firstly, a flexible mould bag (1) is wound on the outer circumferential surface of a wind power foundation along the circumferential direction of the wind power foundation; before the flexible mould bag (1) surrounds a wind power foundation, one end of the flexible mould bag (1) is fixed, then the other end of the flexible mould bag (1) is connected with an unmanned remote control ship (5), and the unmanned remote control ship (5) is started to surround the wind power foundation for one circle; the flexible anti-scouring protection system further comprises a first sealing mechanism (2) and a second sealing mechanism (3), wherein the first sealing mechanism (2) is arranged between the flexible mould bag (1) and the outer circumferential surface of the wind power foundation, and the second sealing mechanism (3) is arranged at the connecting end of the flexible mould bag (1) after encircling the wind power foundation;
step two, connecting a first grouting port (11) and a grouting ship through a pipeline;
sinking the flexible mould bags (1) to the seabed along the length direction of the wind power foundation;
grouting the grouting cavity on the sea level through a pipeline, and expanding and pressing the flexible mould bag (1) on the seabed at the bottom of the wind power foundation in a grouting state;
the flexible mould bags (1) are unfolded to be in a fan-shaped ring shape, and tightening ropes are arranged on the inner circle of the flexible mould bags (1);
the first sealing mechanism (2) comprises a rubber pad (21), a second connecting rope (22), a roller (23) and a limiting rod (24), wherein the rubber pad (21) is circumferentially arranged in the inner circle of the flexible die bag (1), a positioning groove (211) is formed in the inner side of the rubber pad (21) along the length direction of the rubber pad, a second limiting block (212) is arranged in the positioning groove (211), a V-shaped groove (2121) is formed in the outer side of the second limiting block (212), the second connecting rope (22) is arranged in the positioning groove (211) along the length direction of the rubber pad (21), the second connecting rope (22) is abutted in the V-shaped groove (2121), the limiting rod (24) penetrates through the V-shaped groove (2121) along the vertical direction, the roller (23) is rotationally arranged on the second connecting rope (22), the roller (23) is positioned between the tip of the V-shaped groove (2121) and the limiting rod (24), the wind power generation wheel (23) is matched with the outer circumference of the wind power bag (2121) after the wind power generation bag (2121) is connected with the outer circumference of the base of the flexible die bag (212) in a rolling mode, the roller (23) moves to the inner side of the placement groove (211).
2. The flexible anti-scouring method for the operation and maintenance period of the offshore wind power foundation according to claim 1, wherein before the step one, the flexible mould bags (1) are prefabricated on land according to the circumference of the wind power foundation, and the flexible mould bags (1) are folded; the flexible scour protection system still includes first go-between (41), second go-between (42), floater (43), first connecting rope (44), first stopper (45) and coupling hook (46), first go-between (41) are in along circumference setting in the outside of flexible mould bag (1), second go-between (42) with floater (43) are connected, the one end of first connecting rope (44) is passed behind first go-between (41) be connected with first stopper (45), the other end and the second go-between (42) of first connecting rope (44) are connected, and coupling hook (46) have the linkage segment and set up first hook and the second hook at the linkage segment both ends.
3. The flexible anti-scouring method for the operation and maintenance period of the offshore wind power foundation according to claim 2, wherein when the flexible mould bag (1) surrounds the wind power foundation, the first hook part penetrates through the first connecting ring (41), the second hook part penetrates through the second connecting ring (42), and the flexible mould bag (1) floats on the sea surface under the buoyancy action of the floating ball (43); when the flexible mould bag (1) sinks, the first hook part is pulled out of the first connecting ring (41), and the second hook part is pulled out of the second connecting ring (42).
4. A method of flexible anti-scour during operation of an offshore wind power foundation according to any one of claims 1-3, characterized in that the seabed at the bottom of the wind power foundation is leveled by means of a riprap or/and a sand slinger before the flexible mould bags (1) are placed around the wind power foundation.
5. A flexible anti-scouring method for an offshore wind power foundation in operation and maintenance period according to any one of claims 1-3, characterized in that a net-shaped reinforcement pipeline (12) is sewn inside the flexible mold bag (1) and is internally and externally communicated, and a second grouting port (121) is arranged inside the net-shaped reinforcement pipeline (12).
6. The flexible anti-scouring method for the operation and maintenance period of the offshore wind power foundation according to claim 1, wherein two ends of the flexible die bag (1) are provided with a jogged groove (13) and a jogged strip (14) which can be mutually coupled, the second sealing mechanism (3) comprises a first connecting piece (31), a second connecting piece (32) and a third connecting rope (33), the first connecting piece (31) and the second connecting piece (32) are radially arranged at the top end of the flexible die bag (1) along the flexible die bag (1) after being unfolded, rope penetrating openings are formed in the first connecting piece (31) and the second connecting piece (32), and the third connecting rope (33) sequentially penetrates through the rope penetrating openings to connect the first connecting piece (31) and the second connecting piece (32).
7. The flexible anti-scouring protection system for the operation and maintenance period of the offshore wind power foundation is characterized by comprising a flexible mold bag (1), wherein a first sealing mechanism (2), a second sealing mechanism (3), a first connecting ring (41), a second connecting ring (42), a floating ball (43), a first connecting rope (44), a first limiting block (45) and a connecting hook (46), the flexible mold bag (1) extends along the circumferential direction of the wind power foundation, the flexible mold bag (1) is provided with a grouting cavity, and a first grouting port (11) communicated with the grouting cavity is formed in the upper surface of the flexible mold bag (1); the first sealing mechanism (2) is arranged between the flexible die bag (1) and the outer circumferential surface of the wind power foundation, and the second sealing mechanism (3) is arranged at the connecting end of the flexible die bag (1) surrounding the wind power foundation; the first connecting ring (41) is circumferentially arranged at the outer side of the flexible die bag (1), the second connecting ring (42) is connected with the floating ball (43), the first connecting rope (44) passes through the first connecting ring (41) and then is connected with the first limiting block (45), the connecting hook (46) is provided with a connecting section, a first hook part and a second hook part which are arranged at two ends of the connecting section, and the other end of the first connecting rope (44) is connected with the second connecting ring (42);
the flexible mould bags (1) are unfolded to be in a fan-shaped ring shape, and tightening ropes are arranged on the inner circle of the flexible mould bags (1);
the first sealing mechanism (2) comprises a rubber pad (21), a second connecting rope (22), a roller (23) and a limiting rod (24), wherein the rubber pad (21) is circumferentially arranged in the inner circle of the flexible die bag (1), a positioning groove (211) is formed in the inner side of the rubber pad (21) along the length direction of the rubber pad, a second limiting block (212) is arranged in the positioning groove (211), a V-shaped groove (2121) is formed in the outer side of the second limiting block (212), the second connecting rope (22) is arranged in the positioning groove (211) along the length direction of the rubber pad (21), the second connecting rope (22) is abutted in the V-shaped groove (2121), the limiting rod (24) vertically penetrates through the V-shaped groove (2121), the roller (23) is rotationally arranged on the second connecting rope (22), the second connecting rope (23) is positioned between the tip of the V-shaped groove (2121) and the limiting rod (24), and the tip of the second connecting rope (212) is matched with the wind power generation bag (212) in a rolling mode to enable the tip part of the wind power generation bag (1) to be connected with the outer circumference of the foundation after the wind power bag (23) through expansion, the roller (23) moves to the inner side of the placement groove (211).
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| CN116607556A (en) | 2023-08-18 |
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Effective date of registration: 20231225 Address after: No. 8 Huanghe Road, Tongzhou Bay Jianghai Joint Development Demonstration Zone, Nantong City, Jiangsu Province, 226333 Patentee after: JIANGSU DAODA WIND POWER EQUIPMENT TECHNOLOGY CO.,LTD. Patentee after: SHANGHAI INVESTIGATION, DESIGN & RESEARCH INSTITUTE Co.,Ltd. Address before: 226000 No. 8 Huanghe Road, Tongzhou Bay River Sea linkage development demonstration zone, Nantong City, Jiangsu Province Patentee before: JIANGSU DAODA WIND POWER EQUIPMENT TECHNOLOGY CO.,LTD. |
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