CN110847123A - Sleeve cage type anti-scouring structure and construction method - Google Patents
Sleeve cage type anti-scouring structure and construction method Download PDFInfo
- Publication number
- CN110847123A CN110847123A CN201911326042.3A CN201911326042A CN110847123A CN 110847123 A CN110847123 A CN 110847123A CN 201911326042 A CN201911326042 A CN 201911326042A CN 110847123 A CN110847123 A CN 110847123A
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- scouring
- bag
- ballast
- tires
- pile foundation
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/20—Equipment for shipping on coasts, in harbours or on other fixed marine structures, e.g. bollards
- E02B3/26—Fenders
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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Abstract
The invention relates to a cage type anti-scouring structure and a construction method, and the cage type anti-scouring structure comprises an anti-scouring part sleeved at the bottom of a pile foundation, wherein the anti-scouring part is an annular soil bag, or the anti-scouring part is in an annular shape surrounded by a plurality of soil bags, adjacent soil bags are bound and connected through ropes, a plurality of anti-scouring units are placed in the soil bags, the anti-scouring units are in a conical shape surrounded by four tires, the adjacent tires are connected through at least one bolt, and the bag openings of the soil bags are bound and sealed through the ropes.
Description
The invention relates to a lantern type anti-scouring structure.
Background
In recent years, offshore wind power in China develops rapidly and gradually towards deep sea and far sea. Along with the continuous change of water depth and marine environment, the pile diameter of the fan foundation is increased, the sea condition environment is more complex, and seabed scouring can seriously affect the overall stability of the fan foundation and becomes a part of the overall stability analysis of the fan.
At present, the anti-scouring design concept of the foundation of the offshore wind turbine can be divided into two main categories: one is that the anti-scouring measure is not taken, the depth of the pit is determined only according to calculation or a model, and the supporting effect of the part of soil layer is not considered in the basic design, so that the method inevitably increases the pile length greatly, and is neither economical nor beneficial to construction; another category of concepts is the adoption of anti-scour measures, and currently, in ocean engineering practice, the most common anti-scour measures for subsea structures are: underwater stone throwing, sand bag piling, concrete mattress sinking, protective support pile driving and the like. Years of practice prove that the method achieves a certain anti-scouring effect, but the problem of secondary scouring of the seabed can also occur due to the existence of solid objects such as underwater riprap, sand bags, concrete mattress pads and the like.
Disclosure of Invention
In view of the above, the present invention provides a cage-type anti-erosion structure and a construction method thereof.
The invention solves the technical problem by adopting a scheme that a cage type anti-scouring structure comprises an anti-scouring part sleeved at the bottom of a pile foundation, wherein the anti-scouring part is an annular geotextile bag, or the anti-scouring part is in an annular shape surrounded by a plurality of geotextile bags, adjacent geotextile bags are bound and connected through ropes, a plurality of anti-scouring units are placed in the geotextile bag, the anti-scouring units are in a conical shape surrounded by four tires, the adjacent tires are connected through at least one bolt, and the bag openings of the geotextile bags are bound and sealed through the ropes.
Further, the bolt is a plastic bolt.
Further, adjacent tires are connected by 2-4 spirals.
Further, ballast is arranged in the geotextile bag.
Further, the ballast is a sand bag, a concrete block, a lead block or a stone block.
Further, the ballast is bound to an anti-scour unit.
Further, the ballast is not connected to the anti-scour unit.
A construction method of a cage type anti-scouring structure comprises the following steps: (1) after the pile foundation is driven, throwing and filling an anti-scouring bag on the periphery of the pile foundation, and leveling the field around the pile foundation; (2) transporting waste tires to a wharf base, forming holes in the tires, and connecting 4 tires through nylon bolts to form a conical anti-scouring unit; (3) shipping and transporting each assembled anti-scouring unit to the periphery of a pile foundation, selecting a proper position after anchoring and positioning, and sinking after field preparation work is finished; (4) placing a plurality of anti-scouring units and ballast into a geotextile bag, and manufacturing the geotextile bag into an annular or fan-shaped anti-scouring piece; (5) the anti-scouring part is sleeved on the pile foundation by adopting the balance beam, and the whole anti-scouring part is hoisted and lowered in place at one time, so that the anti-scouring part is integrally sunk to the mud surface.
In the step (4), the scour prevention piece is in a ring shape or a fan shape formed by binding the scour prevention unit and the tying opening after the ballast is wrapped by geotextile.
In the step (4), the anti-scouring pieces are spliced and bound into a ring shape or a fan shape through a plurality of soil engineering bags in which anti-scouring units and ballast binding openings are placed.
Compared with the prior art, the invention has the following beneficial effects: simple structure, reasonable in design, the material source is abundant, and the construction is convenient, and cost economy is reasonable, and the scour prevention effect is showing, has strengthened basic seabed stability, has improved the scour prevention ability of structures greatly, can be applicable to each depth of water scope.
Drawings
The invention is further described with reference to the following figures.
FIG. 1 is a schematic structural view of the apparatus;
fig. 2 is a schematic structural view of the anti-scour unit.
In the figure: 1-pile foundation; 2-anti-scouring member; 201-a geotextile bag; 202-anti-scour unit; 3-mud surface; 4-throwing filled anti-scouring bags; 5-a tire; 6-bolt.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1-2, a cage-type anti-erosion structure comprises an anti-erosion component sleeved at the bottom of a pile foundation, wherein the anti-erosion component is an annular geotextile bag, or the anti-erosion component is in a shape of a plurality of geotextile bags enclosing a city, the geotextile bags are in a net shape with a certain width, a water-permeable geosynthetic material formed by synthetic fibers through needling or weaving and has strong corrosion resistance, each geotextile bag can form an annular structure through tying, consolidation and the like, for example, adjacent geotextile bags are tied and connected through a rope, a plurality of anti-erosion units are placed in the geotextile bags, each anti-erosion unit is in a shape of a cone enclosing a city by four tires, the tires are corrosion-resistant and rubber materials with certain rigidity, and can be high-molecular polymers such as polypropylene, polyvinyl chloride and the like, the adjacent tires are connected through at least one bolt, the bag openings of the geotextile bags are bound and sealed through, the scour prevention unit is used as a protective material for loss of seabed sandy soil particles, not only plays a role of ballast weight of the soil engineering bag, but also can reduce regional flow rate, indirectly reduce the flow rate near the pile and prevent seabed sediment from moving. The effect that has played and reduced rivers because tire surface frictional resistance is great when rivers pass through the tire, simultaneously, partial rivers will get into annular cavity in, the cavity will slow down rivers to make the sand and soil that rivers mix with pile up in the tire cavity, after linking into the whole piece with abandonment tire, just can protect pile body around the seabed mud face erode, the centrum form also can regard as the habitat and the spawning ground of marine life simultaneously, constitutes harmonious marine life environment.
In this embodiment, the bolt is a plastic bolt, and the plastic bolt has characteristics of corrosion resistance and high strength.
In this embodiment, adjacent tires are connected by 2-4 spirals.
In this embodiment, be provided with the ballast in the geotechnique bag, be convenient for the construction quicken settling velocity.
In this embodiment, the ballast is a suitable material with a specific gravity greater than that of the seawater, such as a sand bag, a concrete block, a lead block or a rock block.
In this embodiment, the ballast is tied to an anti-scour unit.
In this embodiment, the ballast is not connected to the anti-scour unit.
In this embodiment, the anti-scour units in the geotextile bag can be arranged side by side, and can be arranged in a plurality of layers from top to bottom, and can also be stacked at will.
In this embodiment, the overall geometry of the erosion prevention member can be adjusted according to the flow field condition and the construction condition of the area where the erosion prevention member is located, and the overall shapes of the structure or the foundation of the structure in the incident flow direction and the backward flow direction can be different, and can be other shapes such as a quadrangle, a ring, a sector and the like.
The anti-scouring structure adopts waste tires which are treated increasingly seriously all over the world at present. Due to the undegradability of the waste tires, the shape, the number and the compaction resistance of the waste tires, a large amount of space is required for stacking and processing, and further, the problems of public health, environment and aesthetic value are caused. When the method is used for offshore wind farm engineering, the problem can be relieved;
the anti-scouring structure has advanced anti-scouring principle and simple structure, so that auxiliary ships and equipment required by offshore construction are as few as possible, and the time of underwater construction operation is relatively short;
after the anti-scour structure is installed and sunk in place, the anti-scour structure can almost immediately act to inhibit seabed scour;
the scour prevention structure adopts the tires for scour prevention, and after the tires are internally filled with sandy soil, the seabed can be further stabilized, the self-anchoring function is achieved, and an additional anchoring device is not needed;
when the anti-scouring structure is used, a quite compact silt layer is formed under the action of an annular space inside the tire in the process of depositing silt in water;
when the anti-scouring structure is used, as time continues, a sand bank which takes the tire as a framework and is completely fused with the seabed into a whole is gradually formed on the seabed, the growth of marine organisms cannot be influenced by the existence of the sand bank on the seabed, and the requirement of marine environment protection is met;
the offshore construction cost of the scour prevention structure is far lower than that of the traditional scour prevention measures, only one-time investment is needed, and subsequent maintenance is not needed.
Aiming at the influence of tires on the environment, relevant tests are carried out by domestic and foreign institutions, and the tests comprise the influence of the tires on underground water, organic compounds, inorganic compounds and the like, and test results show that although the content of certain metals (such as iron and manganese) is increased in the process of placing the tires in landfills no matter the whole tires or the broken tires, the influence of tire percolate on the drinking water quality of the underground water is limited, and harmful substances such as benzene, silver, cadmium, selenium and the like are not found in the percolate. At present, relevant experiments at home and abroad show that the influence of the waste tires on the environment is very limited under the water environment condition.
A construction method of a cage type anti-scouring structure comprises the following steps: (1) after the pile foundation is driven, throwing and filling an anti-scouring bag on the periphery of the pile foundation, and leveling the field around the pile foundation; (2) transporting waste tires to a wharf base, forming holes in the tires, and connecting 4 tires through nylon bolts to form a conical anti-scouring unit; (3) shipping and transporting each assembled anti-scouring unit to the periphery of a pile foundation, selecting a proper position after anchoring and positioning, and sinking after field preparation work is finished; (4) placing a plurality of anti-scouring units and ballast into a geotextile bag, and manufacturing the geotextile bag into an annular or fan-shaped anti-scouring piece; (5) the anti-scouring part is sleeved on the pile foundation by adopting the balance beam, and the whole anti-scouring part is hoisted and lowered in place at one time, so that the anti-scouring part is integrally sunk to the mud surface.
In the step (4), the scour prevention piece is in a ring shape or a fan shape formed by binding the scour prevention unit and the tying opening after the ballast is wrapped by geotextile.
In the step (4), the anti-scouring pieces are spliced and bound into a ring shape or a fan shape through a plurality of soil engineering bags in which anti-scouring units and ballast binding openings are placed.
The above-mentioned preferred embodiments, further illustrating the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned are only preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a lantern formula scour prevention structure which characterized in that: the anti-scouring device comprises an anti-scouring part sleeved at the bottom of a pile foundation, wherein the anti-scouring part is an annular geotextile bag; or the scour prevention piece is in a shape of a city enclosed by a plurality of soil engineering bags, and the adjacent soil engineering bags are bound and connected through ropes; place a plurality of scour prevention units in the geotechnique bag, the scour prevention unit is connected through at least one bolt by four tire wall taper, adjacent tire, the sack of geotechnique bag is sealed through the rope ligature.
2. The caging erosion prevention structure of claim 1 wherein: the bolt is a plastic bolt.
3. The caging erosion prevention structure of claim 1 wherein: adjacent tires are connected by 2-4 spirals.
4. The caging erosion prevention structure of claim 1 wherein: the ballast is arranged in the geotextile bag.
5. The caging erosion prevention structure of claim 4, wherein: the ballast is a sand bag, a concrete block, a lead block or a stone block.
6. The caging erosion prevention structure of claim 4, wherein: the ballast is not connected to the anti-scour unit.
7. A construction method of a cage-type anti-scouring structure, which adopts the cage-type anti-scouring structure as claimed in claim 1, and is characterized by comprising the following steps: (1) after the pile foundation is driven, throwing and filling an anti-scouring bag on the periphery of the pile foundation, and leveling the field around the pile foundation; (2) transporting waste tires to a wharf base, forming holes in the tires, and connecting 4 tires through nylon bolts to form a conical anti-scouring unit; (3) shipping and transporting each assembled anti-scouring unit to the periphery of a pile foundation, selecting a proper position after anchoring and positioning, and sinking after field preparation work is finished; (4) placing a plurality of anti-scouring units and ballast into a geotextile bag, and manufacturing the geotextile bag into an annular or fan-shaped anti-scouring piece; (5) the anti-scouring part is sleeved on the pile foundation by adopting the balance beam, and the whole anti-scouring part is hoisted and lowered in place at one time, so that the anti-scouring part is integrally sunk to the mud surface.
8. The construction method of the cage-type anti-scouring structure according to claim 7, characterized in that: in the step (4), the scour prevention piece is in a ring shape or a fan shape formed by binding the scour prevention unit and the tying opening after the ballast is wrapped by geotextile.
9. The construction method of the cage-type anti-scouring structure according to claim 7, characterized in that: in the step (4), the anti-scouring pieces are spliced and bound into a ring shape or a fan shape through a plurality of soil engineering bags in which anti-scouring units and ballast binding openings are placed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911326042.3A CN110847123A (en) | 2019-12-20 | 2019-12-20 | Sleeve cage type anti-scouring structure and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911326042.3A CN110847123A (en) | 2019-12-20 | 2019-12-20 | Sleeve cage type anti-scouring structure and construction method |
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| Publication Number | Publication Date |
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| CN110847123A true CN110847123A (en) | 2020-02-28 |
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| CN201911326042.3A Pending CN110847123A (en) | 2019-12-20 | 2019-12-20 | Sleeve cage type anti-scouring structure and construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114059547A (en) * | 2022-01-18 | 2022-02-18 | 中国海洋大学 | Repair device for offshore wind power single-pile foundation erosion pit and application method thereof |
| CN114508130A (en) * | 2022-03-17 | 2022-05-17 | 福州大学 | Offshore wind turbine anti-scouring structure and setting method thereof |
| CN114575390A (en) * | 2022-04-02 | 2022-06-03 | 广东粤电湛江风力发电有限公司 | Offshore wind power single-pile anti-scouring protection bottom guard based on waste tires |
| CN114790719A (en) * | 2022-04-29 | 2022-07-26 | 福州大学 | Environment-friendly anti-silting device for port and channel and working method thereof |
-
2019
- 2019-12-20 CN CN201911326042.3A patent/CN110847123A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114059547A (en) * | 2022-01-18 | 2022-02-18 | 中国海洋大学 | Repair device for offshore wind power single-pile foundation erosion pit and application method thereof |
| CN114059547B (en) * | 2022-01-18 | 2022-04-08 | 中国海洋大学 | Repair device for offshore wind power single-pile foundation erosion pit and application method thereof |
| CN114508130A (en) * | 2022-03-17 | 2022-05-17 | 福州大学 | Offshore wind turbine anti-scouring structure and setting method thereof |
| CN114575390A (en) * | 2022-04-02 | 2022-06-03 | 广东粤电湛江风力发电有限公司 | Offshore wind power single-pile anti-scouring protection bottom guard based on waste tires |
| CN114575390B (en) * | 2022-04-02 | 2024-04-09 | 广东粤电湛江风力发电有限公司 | Offshore wind power single pile scour protection bottom based on junked tires |
| CN114790719A (en) * | 2022-04-29 | 2022-07-26 | 福州大学 | Environment-friendly anti-silting device for port and channel and working method thereof |
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