CN113006161A - Offshore wind power pile foundation anti-scouring construction method based on solidification side bulldozing - Google Patents
Offshore wind power pile foundation anti-scouring construction method based on solidification side bulldozing Download PDFInfo
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- CN113006161A CN113006161A CN202110166559.1A CN202110166559A CN113006161A CN 113006161 A CN113006161 A CN 113006161A CN 202110166559 A CN202110166559 A CN 202110166559A CN 113006161 A CN113006161 A CN 113006161A
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- 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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- 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
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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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
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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
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/50—Piles comprising both precast concrete portions and concrete portions cast in situ
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/22—Foundations specially adapted for wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Foundations (AREA)
- Wind Motors (AREA)
Abstract
The invention belongs to the field of offshore wind power engineering, and particularly relates to an offshore wind power pile foundation anti-scouring construction method based on solidified side bulldozing, which comprises the following steps: the method comprises the following steps: arranging a grouting pipeline in the pile foundation in advance; step two: driving the pile foundation into the covering soil layer; step three: and connecting grouting equipment with a grouting pipeline, and grouting and filling small gaps and washout pits between the periphery of the pile foundation and the soil covering layer due to construction disturbance until the upper surface of the grouting material is higher than the surface of the seabed soil covering layer. The invention has the advantages that: the invention can grout the gap between the soil around the pile and the washout pit after the pile foundation is sunk, can repair the soil loosening generated in the installation process and fill the soil cavity to avoid the reduction of the bearing capacity of the pile foundation and the further increase of the washout pit.
Description
Technical Field
The invention belongs to the field of offshore wind power engineering, and particularly relates to an offshore wind power pile foundation anti-scouring construction method based on solidification side bulldozing.
Background
Offshore wind power is increasingly gaining attention as a renewable green energy source. Offshore wind power generation is widely applied due to the advantages of large energy density, small limitation by geographical and environmental factors, large total generation hours and the like. The local scouring of the offshore wind power foundation is a problem in the development of offshore wind power, the marine meteorological hydrological conditions of an offshore wind turbine are complex and changeable, extreme wave and current sea conditions are frequent, and silt near a pile is easy to start under the combined action of wind, wave and current of the wind turbine foundation, so that the foundation structure is exposed. On one hand, the bearing capacity and stability of the pile foundation are reduced, and on the other hand, the reduction of the burial depth weakens the lateral constraint of the structure, so that the integral natural vibration frequency is reduced, and the fatigue failure is easier to occur. It is therefore necessary to take corresponding anti-scour measures.
At present, the anti-scouring measures of the offshore wind power pile foundation can be divided into an active measure and a passive measure, the passive anti-scouring generally adopts a stone throwing method to improve the anti-scouring capability of the seabed, and the method is widely applied at present. But the disadvantages are that there is a greater risk of failure due to the influence of the submarine topography and currents, and the cost of riprap is higher as the pile foundation structure is gradually enlarged. The initiative scour protection is at pile foundation plus installation scour protection device usually, through the purpose that changes the rivers form in the scour protection region in order to reach the scour protection, and this type of device has that the construction is complicated, engineering cost is high, and is little to the adaptability of the complicated rivers condition in seabed, is difficult to realize comprehensive protection. And traditional scour prevention mode needs additionally to go on after the pile foundation is installed, and longer construction cycle makes marine construction time longer, leads to the higher progress of wind-powered electricity generation basic installation expense slow.
The existing anti-scouring method neglects the weakening effect of construction on the stress intensity of soil around a pile foundation in the installation process and lacks a tight connection mode with seabed soil, so that the offshore wind power anti-scouring method which is convenient to construct, low in construction cost and capable of repairing soil disturbance caused by installation is particularly important.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a technical scheme of an offshore wind power pile foundation anti-scouring construction method based on solidification side bulldozing.
The offshore wind power pile foundation anti-scouring construction method based on solidified side bulldozing is characterized by comprising the following steps of:
the method comprises the following steps: arranging a grouting pipeline in the pile foundation in advance;
step two: driving the pile foundation into the covering soil layer;
step three: and connecting grouting equipment with a grouting pipeline, and grouting and filling small gaps and washout pits between the periphery of the pile foundation and the soil covering layer due to construction disturbance until the upper surface of the grouting material is higher than the surface of the seabed soil covering layer.
The offshore wind power pile foundation anti-scouring construction method based on solidified side bulldozing is characterized by further comprising the fourth step, wherein the fourth step comprises the following steps: and after the grouting material is aged and condensed, mounting the tower drum and the fan.
The offshore wind power pile foundation anti-scouring construction method based on solidified side bulldozing is characterized in that a plurality of grouting pipelines are uniformly distributed on the inner wall of the pile foundation.
The offshore wind power pile foundation anti-scouring construction method based on solidified side bulldozing is characterized in that a grouting outlet correspondingly connected with a grouting pipeline is formed in the inner wall of the pile foundation.
The offshore wind power pile foundation anti-scouring construction method based on solidified side bulldozing is characterized in that a supporting frame is fixedly connected between the grouting pipeline and the inner wall of the pile foundation.
Compared with the prior art, the invention has the following advantages and innovation points:
1) the invention can grout the gap between the soil around the pile and the washout pit after the pile foundation is sunk, can repair the soil loosening generated in the installation process and fill the soil cavity to avoid the reduction of the bearing capacity of the pile foundation and the further increase of the washout pit;
2) compared with the traditional anti-scouring mode, the invention only needs to additionally install the grouting pipeline in the pile foundation during the pile foundation manufacturing process, does not need to additionally install an external anti-scouring component subsequently, has low construction cost and convenient and rapid construction, and improves the economic benefit of offshore wind power early-stage construction;
3) according to the invention, the existing grouting equipment on the construction ship is used for performing anti-scour grouting on different positions of the pile foundation, no additional ship or equipment is needed, and the grouting connection and anti-scour are integrated in the offshore wind power construction process, so that the offshore wind power construction period and complexity are greatly reduced, the aims of saving offshore operation time, shortening construction period and greatly reducing offshore wind power construction cost are fulfilled;
4) the invention can be applied to different pile foundation forms of offshore wind power, including single pile foundation, jacket foundation, three-pile foundation and the like, and has wide application range.
Drawings
FIG. 1 is a construction flow chart of the present invention;
FIG. 2 is a schematic diagram of pile foundation construction in step two of the present invention;
FIG. 3 is a schematic diagram of pile foundation construction in step three of the present invention;
FIG. 4 is a schematic diagram of pile foundation construction in step four of the present invention;
FIG. 5 is a schematic structural view of grouting performed by the grouting line according to the present invention;
fig. 6 is a schematic top view of the pile foundation of the present invention.
Detailed Description
In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
The invention will be further explained with reference to the drawings.
As shown in the figure, the offshore wind power pile foundation anti-scouring construction method based on solidified side bulldozing comprises the following steps:
the method comprises the following steps: arranging a grouting pipeline 3 in the pile foundation 1 in advance;
step two: driving the pile foundation 1 into a covering soil layer B;
step three: connecting grouting equipment with a grouting pipeline 3, and grouting and filling a small gap between the periphery of the pile foundation 1 and the overburden B and the washout pit 6 caused by construction disturbance until the upper surface of the grouting material 5 is higher than the surface of the seabed overburden B;
step four: and after the grouting material 5 is aged and condensed, mounting the tower drum 7 and the fan 8.
As an optimization: grouting pipeline 3 has a plurality of, and the equipartition is on 1 inner wall of pile foundation, and every grouting pipeline 3 sets up along 1 length direction of pile foundation, and the sea level is stretched out along pile foundation 1 to the upper end, is convenient for be connected with grouting equipment.
Further, the grout export 4 that the ring cloth is connected with grout pipeline 3 one-to-one on 1 inner wall of pile foundation, grout export 4, wherein, 4 position positions of grout export are mainly according to pile foundation 1 preliminary calculation washout hole degree of depth and decide, and when pile foundation 1 was squeezed into and is covered soil layer B, grout export 4 just in time was located two times pile footpath within range below mud face to the mud face.
As an optimization: and the support frame 2 is fixedly connected between the grouting pipeline 3 and the inner wall of the pile foundation 1, and the support frame 2 plays a role in supporting and fixing the grouting pipeline 3.
In the construction process, after the pile foundation 1 is driven, a washout pit 6 in a certain range is formed around the pile foundation 1, the soil pushed laterally around the pile foundation 1 is disturbed, a certain gap possibly exists between pile soils, at the moment, grouting equipment is connected with the part, located above the sea level, of the grouting pipeline 3, small gaps between the periphery of the pile foundation 1 and the overburden B caused by construction disturbance and the washout pit 6 are grouted and filled until the upper surface of the grouting material 5 is higher than the surface of the seabed overburden B, and therefore the gaps and the washout pit 6 generated in the installation process are completely filled. After grouting material 5 is ageing to condense, the side pushes away soil around the pile foundation 1 and obtains the solidification, can increase the soil rigidity around the pile foundation 1 on the one hand, makes 1 side direction bearing capacity of pile foundation promote, and on the other hand, grouting material 5 will be closely continuous with pile foundation 1 with soil around, can avoid the further expansion of follow-up scouring pit, reaches the effect of scour prevention. And finally, mounting the tower 7 and the fan 8.
According to the invention, the grouting outlet 4 is arranged at the mud surface of the pile foundation 1, after the pile foundation 1 is sunk, the grouting filling is carried out on the pile foundation 1, the soil gap and the washout pit 6, the periphery of the solidified pile is pushed to soil, so that the soil around the pile is tightly connected with the pile foundation 1, and the purposes of increasing the lateral bearing capacity and preventing scouring of the pile foundation 1 are achieved.
Compared with the traditional pile foundation structure, the invention increases the arrangement of the grouting pipeline 3 at the mud surface, and meets the requirement of solidifying and side bulldozing through subsequent grouting. In addition, the construction method of the invention uses the existing grouting equipment and offshore construction ship to operate in the pile foundation construction process, does not need to additionally install related devices, greatly reduces the construction difficulty and construction cost, shortens the construction period and achieves the effect of improving the economic benefit of offshore wind power. Compared with the traditional anti-scouring scheme, the invention innovatively considers the restoration of soil disturbance caused by construction and installation, and the pile wall of the pile foundation 1 is tightly connected with the surrounding soil body through the grouting material 5, so that the lateral bearing capacity of the pile foundation 1 is improved.
Compared with the prior art, the invention has the following advantages and innovation points:
1) the invention can grout the gap between the soil around the pile and the washout pit after the pile foundation is sunk, can repair the soil loosening generated in the installation process and fill the soil cavity to avoid the reduction of the bearing capacity of the pile foundation and the further increase of the washout pit;
2) compared with the traditional anti-scouring mode, the invention only needs to additionally install the grouting pipeline in the pile foundation during the pile foundation manufacturing process, does not need to additionally install an external anti-scouring component subsequently, has low construction cost and convenient and rapid construction, and improves the economic benefit of offshore wind power early-stage construction;
3) according to the invention, the existing grouting equipment on the construction ship is used for performing anti-scour grouting on different positions of the pile foundation, no additional ship or equipment is needed, and the grouting connection and anti-scour are integrated in the offshore wind power construction process, so that the offshore wind power construction period and complexity are greatly reduced, the aims of saving offshore operation time, shortening construction period and greatly reducing offshore wind power construction cost are fulfilled;
4) the invention can be applied to different pile foundation forms of offshore wind power, including single pile foundation, jacket foundation, three-pile foundation and the like, and has wide application range.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. An offshore wind power pile foundation anti-scouring construction method based on solidified side bulldozing is characterized by comprising the following steps:
the method comprises the following steps: arranging a grouting pipeline (3) in the pile foundation (1) in advance;
step two: driving the pile foundation (1) into a covering soil layer (B);
step three: and (3) connecting grouting equipment with the grouting pipeline (3), and grouting and filling a small gap between the periphery of the pile foundation (1) and the overburden (B) and the scour pit (6) caused by construction disturbance until the upper surface of the grouting material (5) is higher than the surface of the seabed overburden (B).
2. The offshore wind power pile foundation anti-scouring construction method based on solidified side bulldozing as claimed in claim 1, characterized by further comprising the fourth step, wherein the fourth step comprises: and after the grouting material (5) is aged and condensed, the tower drum (7) and the fan (8) are installed.
3. The offshore wind power pile foundation anti-scouring construction method based on solidified side soil pushing according to claim 1, characterized in that a plurality of grouting pipelines (3) are uniformly distributed on the inner wall of the pile foundation (1).
4. An offshore wind power pile foundation anti-scouring construction method based on solidified side soil pushing according to claim 3, characterized in that the pile foundation (1) has a grouting outlet (4) on its inner wall correspondingly connected with a grouting pipeline (3).
5. The offshore wind power pile foundation anti-scouring construction method based on solidified side soil pushing according to claim 1, characterized in that a support frame (2) is fixedly connected between the grouting pipeline (3) and the inner wall of the pile foundation (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110166559.1A CN113006161A (en) | 2021-02-04 | 2021-02-04 | Offshore wind power pile foundation anti-scouring construction method based on solidification side bulldozing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110166559.1A CN113006161A (en) | 2021-02-04 | 2021-02-04 | Offshore wind power pile foundation anti-scouring construction method based on solidification side bulldozing |
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| CN202110166559.1A Pending CN113006161A (en) | 2021-02-04 | 2021-02-04 | Offshore wind power pile foundation anti-scouring construction method based on solidification side bulldozing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113684858A (en) * | 2021-08-31 | 2021-11-23 | 华能(浙江)能源开发有限公司清洁能源分公司 | Offshore wind power foundation with sand guiding function |
| CN113699974A (en) * | 2021-09-24 | 2021-11-26 | 华电重工股份有限公司 | Solidified soil hydraulic filling device for offshore wind turbine foundation |
| CN113718833A (en) * | 2021-09-16 | 2021-11-30 | 中国华能集团清洁能源技术研究院有限公司 | Offshore wind power anti-scouring foundation |
| CN114753414A (en) * | 2022-04-13 | 2022-07-15 | 中交三航局第三工程有限公司 | Intelligent anti-scouring device and method for annular grid type fluidized soil steel pipe pile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113684858A (en) * | 2021-08-31 | 2021-11-23 | 华能(浙江)能源开发有限公司清洁能源分公司 | Offshore wind power foundation with sand guiding function |
| CN113718833A (en) * | 2021-09-16 | 2021-11-30 | 中国华能集团清洁能源技术研究院有限公司 | Offshore wind power anti-scouring foundation |
| CN113699974A (en) * | 2021-09-24 | 2021-11-26 | 华电重工股份有限公司 | Solidified soil hydraulic filling device for offshore wind turbine foundation |
| CN114753414A (en) * | 2022-04-13 | 2022-07-15 | 中交三航局第三工程有限公司 | Intelligent anti-scouring device and method for annular grid type fluidized soil steel pipe pile |
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Application publication date: 20210622 |
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