CN111074926A - Offshore wind power enhanced single-pile foundation and construction method thereof - Google Patents
Offshore wind power enhanced single-pile foundation and construction method thereof Download PDFInfo
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- CN111074926A CN111074926A CN201911422057.XA CN201911422057A CN111074926A CN 111074926 A CN111074926 A CN 111074926A CN 201911422057 A CN201911422057 A CN 201911422057A CN 111074926 A CN111074926 A CN 111074926A
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- pile
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- offshore wind
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- 238000010276 construction Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 31
- 239000010959 steel Substances 0.000 claims abstract description 31
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 238000009933 burial Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
- E02D27/525—Submerged foundations, i.e. submerged in open water using elements penetrating the underwater ground
Abstract
The invention relates to an offshore wind power enhanced single-pile foundation and a construction method thereof. The invention aims to provide an offshore wind power enhanced single-pile foundation with simple structure, convenient construction and lower cost and a construction method thereof, so as to improve the rigidity and horizontal bearing capacity of the single-pile foundation. The technical scheme of the invention is as follows: the utility model provides an offshore wind power enhancement mode single pile basis which characterized in that: the pile comprises a single pile and a reinforcing component, wherein the reinforcing component is provided with a sleeve coaxially sleeved on the single pile and a plurality of pile casings which are uniformly arranged around the sleeve and connected with the sleeve through a connecting mechanism; and steel sheet piles are inserted into the pile sleeve box, the steel sheet piles are driven into the seabed, and high-strength grouting materials are filled in gaps between the pile sleeve box and the steel sheet piles. The invention is suitable for the technical field of offshore wind power.
Description
Technical Field
The invention relates to an offshore wind power enhanced single-pile foundation and a construction method thereof, which are applicable to the technical field of offshore wind power.
Background
The structure form of the offshore wind turbine foundation can be divided into a single-pile foundation, a gravity type foundation, a multi-pile foundation, a suction type foundation, a floating type foundation and the like. The single-pile foundation is the most simple type of offshore wind turbine foundation and is the dominant type of offshore wind power foundation at present. According to statistics, more than 75% of the current global offshore wind turbine foundations adopt a single-pile foundation form.
The foundation of the offshore wind turbine mainly bears horizontal loads such as wind, waves, currents, ice and the like, and the horizontal bearing performance is the key of the foundation. Because the horizontal rigidity of the single-pile foundation is relatively small, the redundancy is small, the horizontal displacement and the corner of the pile body under the action of load are often large, and the single-pile foundation is difficult to continuously apply to some sea areas with special geological conditions.
Aiming at the problem that the offshore wind power single pile foundation is small in horizontal rigidity, the existing engineering adopts a method for increasing the sizes of the single pile such as the length, the diameter and the wall thickness. However, in a sea area having a deep sludge layer or a sea bed where scouring is severe, the amount of steel used for a single pile is significantly increased only by increasing the size of the single pile; in the sea area with shallow bedrock burial depth, in order to increase the pile length, construction measures of drilling and rock embedding have to be adopted, and the construction cost is greatly increased.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the problems, the offshore wind power reinforced single-pile foundation and the construction method thereof are simple in structure, convenient to construct and low in cost, so that the rigidity and the horizontal bearing capacity of the single-pile foundation are improved.
The technical scheme adopted by the invention is as follows: the utility model provides an offshore wind power enhancement mode single pile basis which characterized in that: the pile comprises a single pile and a reinforcing component, wherein the reinforcing component is provided with a sleeve coaxially sleeved on the single pile and a plurality of pile casings which are uniformly arranged around the sleeve and connected with the sleeve through a connecting mechanism;
and steel sheet piles are inserted into the pile sleeve box, the steel sheet piles are driven into the seabed, and high-strength grouting materials are filled in gaps between the pile sleeve box and the steel sheet piles.
The pile sleeve box is provided with an anti-sinking plate and a plurality of pile frames arranged on the anti-sinking plate, the pile frames are connected through horizontal support rods, and the steel sheet piles are inserted into the pile frames.
And a plurality of shear keys are arranged on the inner wall of the sleeve and the outer wall of the single pile corresponding to the sleeve, and a high-strength grouting material is filled in a gap between the sleeve and the single pile.
The connecting mechanism is provided with a horizontal beam for connecting the pile casing box and the sleeve.
The horizontal beams are connected with each other through the cross braces.
The diameter of the connecting end of the horizontal beam and the sleeve is gradually increased, and a reinforcing ring is arranged on the inner wall of the connecting end.
And a pile cap is arranged at the top of the steel sheet pile.
The construction method of the offshore wind power reinforced single-pile foundation is characterized by comprising the following steps:
positioning the position of the foundation in the sea area during field construction;
single pile sinking construction, namely driving the single pile into the seabed by using a large-scale pile hammer;
hoisting a reinforcing member, wherein the reinforcing member is sleeved on the single pile through a sleeve and is hoisted to a mud surface position;
the hoisting steel sheet pile is inserted into the pile sleeve box and is driven into the seabed by adopting an underwater hydraulic pile driving hammer to complete the construction of the steel sheet pile;
grouting and connecting the gap between the pile sleeve box and the steel sheet pile by adopting a high-strength grouting material;
and grouting and connecting the gap between the single pile and the sleeve by adopting a high-strength grouting material.
The invention has the beneficial effects that: according to the invention, the reinforcing members are arranged at the mud surface position of the single-pile foundation, the reinforcing members are fixed through the steel sheet piles which are easy to construct, and the members are connected through high-strength grouting, so that the rigidity and the horizontal bearing capacity of the single-pile foundation are improved, and the dynamic response of the foundation structure is reduced.
The invention expands the applicability of the single-pile foundation, so that the single-pile foundation can be suitable for the sea areas with deep overlying sludge layers, serious seabed scouring, shallow bedrock burial depth and other natural conditions, and the construction difficulty and the engineering cost of the single-pile foundation in the sea areas with special geological conditions are greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of the embodiment.
Fig. 2 is a top view of the embodiment.
Fig. 3 is a schematic structural view of a pile casing in the embodiment.
Fig. 4 is a top view of the pile encasement of an embodiment.
Fig. 5 is a schematic diagram of the structural arrangement between the casing and the mono-pile in the embodiment.
Detailed Description
As shown in fig. 1 and fig. 2, the present embodiment is an offshore wind power reinforced mono-pile foundation, which has a mono-pile 1 and a reinforcing member.
The reinforcing component is provided with a sleeve 2 and 3 pile sleeve boxes 5 which are coaxially sleeved on the single pile 1, the 3 pile sleeve boxes 5 are uniformly distributed around the sleeve 2, and the pile sleeve boxes 5 are connected with the sleeve 2 through a connecting mechanism.
As shown in fig. 3 and 4, in this example, the pile casing 5 has an anti-sinking plate 503 and 2 pile frames 501 provided on the anti-sinking plate 503, the pile frames 501 in the pile casing 5 are connected to the pile frames 501 via two horizontal stay bars 502, and the pile frames 501 are provided with vertically penetrating insertion holes for inserting the steel sheet piles 6.
In this embodiment, the connecting mechanism has three horizontal beams 3, the horizontal beams 3 are connected with the pile sleeve boxes 5 and the sleeves 2, and the horizontal beams 3 are connected with the horizontal beams 3 through the cross braces 4, so as to enhance the overall strength of the member. The horizontal beam 3 and the cross brace 4 both adopt circular section steel pipes to reduce the water flow effect.
In this example, the outer diameter of the horizontal beam 3 is gradually increased at the node position (the end connected with the bushing) where the stress is large, and a reinforcing ring 301 is arranged on the inner wall of the horizontal beam 3.
In the embodiment, the single pile 1 is vertically driven into the seabed, the reinforcing member is sleeved on the single pile 1 through the sleeve 2 and is arranged on the seabed, the steel sheet pile 6 is inserted into the pile frame 501 and is driven into the seabed, and the steel sheet pile 6 is arranged in a radial direction perpendicular to the single pile 1. The top of the steel sheet pile 6 is provided with a pile cap 601 for piling construction. In this example, a high-strength grouting material 8 is poured into a gap between the pile frame 501 and the steel sheet pile 6, and a high-strength grouting material 8 is poured into a gap between the sleeve 2 and the single pile 1 (see fig. 5).
In the embodiment, a plurality of shear keys 7 are arranged on the inner wall of the sleeve 2 and the outer wall of the single pile 1 corresponding to the sleeve 2, so that the strength of corresponding components is increased, and the connection between the sleeve 2 and the high-strength grouting material 8 and the connection between the single pile 1 and the high-strength grouting material 8 are reinforced.
The specific construction method of the embodiment comprises the following steps:
after accurate lofting in a factory, sequentially arranging and welding and fixing a sleeve 2, a horizontal beam 3, a cross brace 4 and a pile sleeve box 5 from inside to outside, and welding a sleeve shear key 7 on the inner wall of the sleeve 2 to obtain a reinforced member; and (3) manufacturing the single pile 1 and the steel sheet pile 6 by factory processing.
Positioning the position of the foundation in the sea area during field construction;
the single pile 1 is driven into the seabed by a large-scale pile driving hammer;
hoisting a reinforcing member, namely sleeving the reinforcing member on the single pile 1 through a sleeve 2, and hoisting the reinforcing member to a mud surface position;
the hoisting steel sheet piles 6 are inserted into the pile sleeve boxes 5 and are driven into the seabed by adopting an underwater hydraulic pile driving hammer, so that the construction of 6 steel sheet piles 6 is completed;
grouting and connecting the gap between the pile sleeve box 5 and the steel sheet pile 6 by adopting a high-strength grouting material 8;
and (3) grouting and connecting the gap between the single pile 1 and the sleeve 2 by adopting a high-strength grouting material 8.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides an offshore wind power enhancement mode single pile basis which characterized in that: the pile is provided with a single pile (1) and a reinforcing component, wherein the reinforcing component is provided with a sleeve (2) coaxially sleeved on the single pile (1) and a plurality of pile sleeve boxes (5) which are uniformly arranged around the sleeve (2) and connected with the sleeve (2) through a connecting mechanism;
the steel sheet pile (6) is inserted into the pile sleeve box (5), the steel sheet pile (6) is driven into a seabed, and a gap between the pile sleeve box (5) and the steel sheet pile (6) is filled with a high-strength grouting material (8).
2. An offshore wind power enhanced single pile foundation according to claim 1, characterised in that: the pile sleeve box (5) is provided with an anti-sinking plate (503) and a plurality of pile frames (501) arranged on the anti-sinking plate (503), the pile frames (501) are connected with the pile frames (501) through horizontal support rods (502), and the steel sheet piles (6) are inserted into the pile frames.
3. An offshore wind power enhanced single pile foundation according to claim 1, characterised in that: a plurality of shear keys (7) are arranged on the inner wall of the sleeve (2) and the outer wall of the single pile (1) corresponding to the sleeve (2), and a high-strength grouting material (8) is filled in a gap between the sleeve (2) and the single pile (1).
4. An offshore wind power enhanced single pile foundation according to claim 1, characterised in that: the connecting mechanism is provided with a horizontal beam (3) which connects the pile casing (5) and the sleeve (2).
5. Offshore wind power enhanced single pile foundation according to claim 4, characterised in that: the horizontal beams (3) are connected with the horizontal beams (3) through cross braces (4).
6. Offshore wind power reinforced mono-pile foundation according to claim 4 or 5, characterized in that: the diameter of the connecting end of the horizontal beam (3) and the sleeve (2) is gradually increased, and a reinforcing ring (301) is arranged on the inner wall of the connecting end.
7. An offshore wind power enhanced single pile foundation according to claim 1, characterised in that: and a pile cap (601) is arranged at the top of the steel sheet pile (6).
8. A construction method of an offshore wind power enhanced single pile foundation according to any one of claims 1 to 7, characterized by comprising the following steps:
positioning the position of the foundation in the sea area during field construction;
the single pile (1) is driven into the seabed by a large-scale pile driving hammer;
the reinforcing member is hoisted and placed to the position of a mud surface by being sleeved on the single pile (1) through the sleeve (2);
the hoisting steel sheet pile (6) is inserted into the pile sleeve box (5), and is driven into the seabed by adopting an underwater hydraulic pile driving hammer to complete the construction of the steel sheet pile (6);
grouting and connecting the gap between the pile sleeve box (5) and the steel sheet pile (6) by adopting a high-strength grouting material (8);
and (3) adopting a high-strength grouting material (8) to perform grouting connection on the gap between the single pile (1) and the sleeve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422057.XA CN111074926A (en) | 2019-12-31 | 2019-12-31 | Offshore wind power enhanced single-pile foundation and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422057.XA CN111074926A (en) | 2019-12-31 | 2019-12-31 | Offshore wind power enhanced single-pile foundation and construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111074926A true CN111074926A (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911422057.XA Pending CN111074926A (en) | 2019-12-31 | 2019-12-31 | Offshore wind power enhanced single-pile foundation and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115075283A (en) * | 2021-03-16 | 2022-09-20 | 中国电建集团华东勘测设计研究院有限公司 | Anti-scouring structure for single pile foundation of offshore wind turbine generator and construction method of anti-scouring structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2672012A1 (en) * | 2011-03-02 | 2013-12-11 | Nippon Steel & Sumitomo Metal Corporation | Connecting structure for connecting steel pipe pile and steel outer pipe |
| CN104179190A (en) * | 2014-09-05 | 2014-12-03 | 熊翱 | Composite pile foundation for offshore wind power and construction method thereof |
| CN204676582U (en) * | 2015-03-23 | 2015-09-30 | 中国电建集团华东勘测设计研究院有限公司 | A type stent-type offshore wind turbine foundation structure |
| CN108118697A (en) * | 2018-02-28 | 2018-06-05 | 浙江华蕴海洋工程技术服务有限公司 | The convenient adjusting apparatus of marine guidance piling and method of adjustment |
| CN109826225A (en) * | 2019-03-27 | 2019-05-31 | 福建省水利水电勘测设计研究院 | Single-pile foundation for offshore wind generation set reinforces piling strtucture and construction method |
| CN211735481U (en) * | 2019-12-31 | 2020-10-23 | 中国电建集团华东勘测设计研究院有限公司 | Offshore wind power enhanced single-pile foundation |
-
2019
- 2019-12-31 CN CN201911422057.XA patent/CN111074926A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2672012A1 (en) * | 2011-03-02 | 2013-12-11 | Nippon Steel & Sumitomo Metal Corporation | Connecting structure for connecting steel pipe pile and steel outer pipe |
| CN104179190A (en) * | 2014-09-05 | 2014-12-03 | 熊翱 | Composite pile foundation for offshore wind power and construction method thereof |
| CN204676582U (en) * | 2015-03-23 | 2015-09-30 | 中国电建集团华东勘测设计研究院有限公司 | A type stent-type offshore wind turbine foundation structure |
| CN108118697A (en) * | 2018-02-28 | 2018-06-05 | 浙江华蕴海洋工程技术服务有限公司 | The convenient adjusting apparatus of marine guidance piling and method of adjustment |
| CN109826225A (en) * | 2019-03-27 | 2019-05-31 | 福建省水利水电勘测设计研究院 | Single-pile foundation for offshore wind generation set reinforces piling strtucture and construction method |
| CN211735481U (en) * | 2019-12-31 | 2020-10-23 | 中国电建集团华东勘测设计研究院有限公司 | Offshore wind power enhanced single-pile foundation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115075283A (en) * | 2021-03-16 | 2022-09-20 | 中国电建集团华东勘测设计研究院有限公司 | Anti-scouring structure for single pile foundation of offshore wind turbine generator and construction method of anti-scouring structure |
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