CN211646449U - Combined single-pile foundation of offshore wind turbine - Google Patents
Combined single-pile foundation of offshore wind turbine Download PDFInfo
- Publication number
- CN211646449U CN211646449U CN201922299486.4U CN201922299486U CN211646449U CN 211646449 U CN211646449 U CN 211646449U CN 201922299486 U CN201922299486 U CN 201922299486U CN 211646449 U CN211646449 U CN 211646449U
- Authority
- CN
- China
- Prior art keywords
- pile
- pile body
- wind turbine
- gravity
- wing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
-
- 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
- E02D27/50—Anchored foundations
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Wind Motors (AREA)
- Foundations (AREA)
Abstract
A combined single-pile foundation for offshore wind turbine is composed of pile body, pile wings on the external wall of the anchoring segment of pile body, and gravity disk with rigid structure and fixed or freely connected to pile body. The utility model discloses the all soil body of stake can be reinforceed to the gravity dish, reduces the stake wing size, improves stake wing atress, and the synergism of single pile, stake wing and gravity dish can fully mobilize passive soil pressure and the shear resistance of the all soil body of stake, improves the horizontal bearing capacity of pile foundation, reduces the rotation and the lateral displacement of pile body, reduces pile body moment of flexure, and then can suitably reduce pile body diameter and pile body length, reduces engineering cost for the construction progress.
Description
Technical Field
The utility model belongs to the technical field of offshore wind power, a marine fan combination formula single pile basis is related to.
Background
Offshore wind power, as a clean energy, has the characteristics of high wind speed, stable wind speed, large single-machine capacity and the like, and is in a high-speed development period. Due to the complex offshore geological conditions, the construction technology difficulty of offshore wind power is high, the construction cost is high, and the offshore wind power plant cost accounts for 15% -25% of the total cost of the offshore wind turbine base cost according to statistics. At present, the basic types of offshore wind turbine foundations can be classified into gravity type, mono-pile type, suction drum type, triple-pile type, jacket type, and floating type according to offshore distance. The single-pile foundation can adapt to different geological conditions, has the advantages of high construction speed, low engineering cost and the like, is widely used, and accounts for more than 70 percent in the built offshore wind farm.
During the operation of an offshore wind turbine, the horizontal load required to be borne by the single-pile foundation comprises wind load, wave load, ocean current load, sea ice load and the like, the vertical load required to be borne comprises the load of the wind turbine and the load of the pile body, and under the action of various cyclic loads, the single-pile foundation can generate large transverse displacement and rotation. The geological conditions of the sea areas of China are very complex, the covering soil body is usually composed of silt, silt clay, fine sand, silt sand and the like, and the fluctuation of the bedrock surface below the covering layer is large due to large thickness difference of the covering layer. Along with the increase that fan unit required the foundation bearing capacity, pile shaft diameter needs corresponding increase, often need carry out the construction of rock-socketed pile, and the boulder of granite area morals and manners is comparatively general simultaneously, and the detection degree of difficulty is big, and the boulder easily leads to the turn-up of steel-pipe pile, card hole and hole etc. that collapses, and the construction risk is great, and the construction progress is slower, if judge the boulder mistake as complete basement rock during the reconnaissance, the pile tip is arranged in the boulder, then can cause the influence to the stability of fan. In addition, the ability of the mono pile to provide vertical bearing capacity is greater than the horizontal bearing capacity provided by the mono pile. Based on this, the urgent need provides a novel offshore wind turbine single pile basis, makes it can be applicable to deep water shallow overburden, has the sea area of boulder, makes the pile body need not to go deep into the bedrock through the new form of pile foundation, just can satisfy the demand of the bearing capacity of fan unit, reduces the construction risk, improves construction speed, reduces construction cost, guarantees the safe and stable operation of fan.
Disclosure of Invention
The utility model aims to solve the technical problem of providing an offshore wind turbine combined single pile foundation, wherein a pile wing is fixed on the outer wall of the upper part of an anchoring section of a pile body, a gravity disc is positioned at the interface of the surrounding soil body of the pile body and seawater, the pile body, the pile wing and the gravity disc are fixedly or freely connected, the gravity disc is of a rigid structure, the gravity disc can strengthen the soil body around the pile body, the bearing capacity of the pile body is improved, the pile wing and the gravity disc fully adjust the passive soil pressure and the shearing resistance of the soil body around the pile body, the horizontal bearing capacity of a pile foundation is improved, the rotation and the lateral displacement of the pile body are reduced, the bending moment of the pile body is reduced, the safe and stable operation of a wind turbine unit is ensured, under the condition of meeting the bearing capacity of the wind turbine unit, the diameter and the length of the pile body can be properly reduced by optimizing the structural types and structural parameters of the pile wing and the gravity disc, so, and the construction progress is accelerated.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a combined single-pile foundation of an offshore wind turbine comprises a pile body, pile wings and a gravity disc; the pile wing is positioned on the outer wall of the upper part of the pile body anchoring section, the gravity disc surrounds the pile body and is arranged at the interface of the pile body soil body and the seawater, and the pile body, the top end of the pile wing and the gravity disc are fixedly or freely connected; the gravity disc is in a rigid structure.
The pile body is a large-diameter steel pipe, and the pile wings are steel plates.
The pile wings are radially and symmetrically arranged around the pile body as the center, so that the resistance of soil around the pile can be fully adjusted, and the horizontal bearing capacity of the combined single-pile foundation is improved.
The number of the pile wings is an even number, not less than four, the pile wings with the even number are symmetrically arranged, and the pile body and the wing plates are stressed evenly.
The pile wing is of a trapezoidal structure, the bottom edge is an inclined edge, and the normal direction of the pile wing is perpendicular to the axial direction of the pile body or forms an included angle with the axial direction of the pile body, so that the influence of the pile wing on the pile sinking process of the pile body is reduced.
The gravity disc is one of a steel plate, concrete or reinforced concrete, the structural type, the material and the size of the gravity disc are related to the geological conditions of the pile foundation, the external load size and the construction mode, and the gravity disc, the pile wings and the pile body can be fixedly connected by adopting an underwater pouring technology for construction.
The utility model discloses there is following beneficial effect:
according to the offshore wind turbine combined single pile foundation provided by the embodiment of the utility model, the gravity disc is additionally arranged on the interface between the soil body of the pile body and the seawater to strengthen the soil body around the pile, so that the self bearing capacity of the pile body can be improved, the shearing resistance and the passive soil pressure between the gravity disc and the soil body can be fully adjusted, and the horizontal bearing capacity of the pile foundation is improved; the pile wing is welded on the outer wall of the upper part of the anchoring section of the pile body, so that the influence of the pile wing on the pile sinking process is reduced, meanwhile, the pile wing can also fully utilize the passive soil pressure of the soil body around the pile after being strengthened by the gravity disc, the horizontal displacement and the rotary displacement of the pile foundation are further reduced, and the horizontal bearing capacity and the anti-torsion capacity of the pile foundation are improved; the gravity disc and the pile body with the pile wings are two relatively independent pile foundation structures, and the gravity disc construction is carried out after pile sinking is completed, so that the combined single-pile foundation can adopt the existing pile sinking process and pile sinking equipment, and the gravity disc has no influence on the pile sinking process. When the gravity disc is fixedly connected with the pile body and the pile wings, the gravity disc can also bear the vertical load of the pile foundation.
The utility model discloses when offshore wind turbine combination formula single pile basis and ordinary single pile basis provide the same bearing capacity, through adding and establishing stake wing and gravity dish, can suitably reduce stake footpath and pile body anchor length, consequently combination formula single pile basis is applicable in shallow overburden in deep water, has the sea area of boulder, avoids the construction of rock-socketed pile, has reduction engineering cost, avoids the construction risk for advantages such as construction progress. Compare with conventional pterygoid lamina single pile basis, the utility model discloses an offshore wind turbine combination formula single pile basis establishes the gravity dish through adding, can reduce the length and the width of pterygoid lamina on the one hand, and furthest reduces the influence of pterygoid lamina to pile sinking process, and pterygoid lamina atress mode can be improved to on the other hand gravity dish, reduces the bending deformation of pterygoid lamina, reduces the stress concentration and the fatigue load of pterygoid lamina and pile body junction, prolongs the life of pterygoid lamina. In addition, the gravity disc is positioned at the interface of the soil body of the pile body and the seawater, so that the scouring of waves and oceans to the soil body of the foundation around the single pile can be reduced.
The utility model discloses a construction method of offshore wind turbine combined single pile foundation, the pile body construction can adopt the existing pile sinking equipment, also can adopt the modified pile sinking equipment, the adoption of the modified pile sinking equipment can accelerate the construction speed of the single pile with the wing plate; the manufacturing and installation mode of the gravity disc depends on site construction conditions, prefabrication can be completed in a factory firstly, and the gravity disc can also be formed by in-situ pouring by adopting an underwater self-flowing controllable grouting technology; the connection mode of the pile body and the gravity disc can adopt fixed connection or movable connection, and different connection modes correspond to different stress mechanisms. The utility model provides an offshore wind turbine combination formula single pile basis construction method has nimble variety, according to the site operation condition, can optimize the work progress.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic sectional view at a-a of fig. 1.
In the figure: pile body 1, pile wing 2, gravity dish 3.
Detailed Description
As shown in fig. 1-2, an offshore wind turbine combined single pile foundation comprises a pile body 1, a pile wing 2 and a gravity disc 3; the pile wing 2 is positioned on the outer wall of the upper part of the anchoring section of the pile body 1, the gravity 3 disc surrounds the pile body 1 and is arranged at the interface of the soil body of the pile body and the seawater, and the gravity disc 3 is fixedly or freely connected with the pile body 1; the gravity plate 3 is constructed in a rigid structure.
The offshore wind turbine combined single pile foundation of the embodiment of the utility model strengthens the soil body around the pile by additionally arranging the gravity disc 3 on the interface of the soil body of the pile body 1 and seawater, not only can improve the self bearing capacity of the pile body, but also can fully transfer the shearing resistance and the passive soil pressure between the gravity disc 3 and the soil body, improve the horizontal bearing capacity of a pile foundation, weld the pile wing 2 on the outer wall of the upper part of the anchoring section of the pile body 1, and reduce the influence of the pile wing 2 on the pile sinking process; fully transfer the passive soil pressure of the all-round soil body of pile, reduce pile foundation horizontal displacement and rotary displacement, improve the horizontal bearing capacity and the antitorque commentaries on classics ability of pile foundation, when gravity dish 3 adopted fixed connection with pile body 1 and pile wing 2, gravity dish 3 can also undertake the vertical load of pile foundation.
The utility model discloses when offshore wind turbine combination formula single pile basis and ordinary single pile basis provide the same bearing capacity, through adding and establishing stake wing and gravity dish, can suitably reduce stake footpath and pile body anchor length, consequently combination formula single pile basis is applicable in shallow overburden in deep water, has the sea area of boulder, avoids the construction of rock-socketed pile, has reduction engineering cost, avoids the construction risk for advantages such as construction progress. Compare with conventional pterygoid lamina single pile basis, the utility model discloses an offshore wind turbine combination formula single pile basis establishes the gravity dish through adding, can reduce the length and the width of pterygoid lamina on the one hand, and furthest reduces the influence of pterygoid lamina to pile sinking process, and pterygoid lamina atress mode can be improved to on the other hand gravity dish, reduces the bending deformation of pterygoid lamina, reduces the stress concentration and the fatigue load of pterygoid lamina and pile body junction, prolongs the life of pterygoid lamina. In addition, the gravity disc is positioned at the interface of the soil body of the pile body and the seawater, so that the scouring of waves and oceans to the soil body of the foundation around the single pile can be reduced.
Preferably, the pile wings 2 are radially and symmetrically and uniformly arranged around the pile body as the center so as to fully adjust the resistance of soil around the pile and improve the horizontal bearing capacity of the combined single-pile foundation.
Preferably, the number of the pile wings 2 is even number, and not less than four, the pile wings 2 with the even number are symmetrically arranged, and the combined single-pile foundation structure is more balanced in stress.
Preferably, the pile wing 2 is of a trapezoidal structure, the bottom edge is an inclined edge, and the normal direction of the inclined edge is perpendicular to the axial direction of the pile body or forms an included angle with the axial direction of the pile body. The pile wing 2 is trapezoidal, and the base of pile wing 2 is the hypotenuse or forms the contained angle, reduces the influence of pile wing 2 to pile body pile sinking process.
Preferably, the gravity disc 3 is one of steel plate, concrete or reinforced concrete, the structural style, material and size of the gravity disc 3 are related to the geological conditions of the pile foundation, the magnitude of external load and the construction mode, and the gravity disc, the pile wings and the pile body can be constructed by adopting an underwater pouring technology to form a fixed connection.
When gravity dish 3 adopts modes such as water injection mud of irritating and pile body 1 and pile wing 2 fixed connection, pile body 1, pile wing 2 and gravity dish 3 form overall structure, gravity dish 3 can bear the vertical load that the pile foundation bore, horizontal load and twist reverse the load, when gravity dish 3 is connected for free contact with pile body 1 and pile wing 2, gravity dish 3 is two relatively independent pile foundation structures with pile body 1 of taking pile wing 2, gravity dish 3 can improve the horizontal bearing capacity and the anti rotation ability of pile foundation, reduce single pile lateral displacement and torsional displacement, reduce pile body moment of flexure, gravity dish 3 can not bear the vertical load of pile foundation this moment, pile body 1 of taking pile wing 2 can reciprocate.
The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (6)
1. The utility model provides an offshore wind turbine combination formula single pile basis which characterized by: it comprises a pile body (1), pile wings (2) and a gravity disc (3); the pile wing (2) is positioned on the outer wall of the upper part of the anchoring section of the pile body (1), the gravity disc (3) surrounds the pile body (1) and is arranged at the interface of the soil body of the pile body (1) and seawater, and the top ends of the pile body (1) and the pile wing (2) are fixedly connected or freely connected with the gravity disc (3); the gravity disc (3) is in a rigid structure.
2. The offshore wind turbine combined type single-pile foundation as claimed in claim 1, wherein: the pile body (1) is a large-diameter steel pipe, and the pile wings (2) are steel plates.
3. The offshore wind turbine combined type single-pile foundation as claimed in claim 1, wherein: the pile wings (2) are radially, symmetrically and uniformly arranged around the pile body (1) as the center.
4. The offshore wind turbine combined type single-pile foundation as claimed in claim 3, wherein: the number of the pile wings (2) is even and is not less than four.
5. The offshore wind turbine combined type single-pile foundation as claimed in claim 1, wherein: the pile wing (2) is of a trapezoidal structure, the bottom edge is an inclined edge, and the normal direction of the pile wing is perpendicular to the axial direction of the pile body or forms an included angle with the axial direction of the pile body.
6. The offshore wind turbine combined type single-pile foundation as claimed in claim 1, wherein: the gravity plate (3) is one of a steel plate, concrete or reinforced concrete.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922299486.4U CN211646449U (en) | 2019-12-19 | 2019-12-19 | Combined single-pile foundation of offshore wind turbine |
| DE202020106243.3U DE202020106243U1 (en) | 2019-12-19 | 2020-10-30 | Combined single pile foundation structure for offshore wind power |
| JP2020004780U JP3230883U (en) | 2019-12-19 | 2020-11-05 | Combined single pile foundation structure for offshore wind power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922299486.4U CN211646449U (en) | 2019-12-19 | 2019-12-19 | Combined single-pile foundation of offshore wind turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211646449U true CN211646449U (en) | 2020-10-09 |
Family
ID=72697296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922299486.4U Active CN211646449U (en) | 2019-12-19 | 2019-12-19 | Combined single-pile foundation of offshore wind turbine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3230883U (en) |
| CN (1) | CN211646449U (en) |
| DE (1) | DE202020106243U1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110984212A (en) * | 2019-12-19 | 2020-04-10 | 中国长江三峡集团有限公司 | Offshore wind turbine combined single-pile foundation and construction method |
| CN112627222A (en) * | 2020-12-17 | 2021-04-09 | 中国长江三峡集团有限公司 | Novel offshore wind power foundation applicable to shallow covering layer and construction method thereof |
| RU2819059C1 (en) * | 2024-02-27 | 2024-05-13 | Общество с ограниченной ответственностью "РусГазШельф" | Underwater system for retention of a structure floating on the surface or in the water column (versions), a pile for it (versions), a weight for such a pile, and a method for installing such an underwater system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277856B (en) * | 2022-01-21 | 2023-09-01 | 中国长江三峡集团有限公司 | Anti-scour construction method for single pile foundation based on mosaic underwater cemented rock-fill |
-
2019
- 2019-12-19 CN CN201922299486.4U patent/CN211646449U/en active Active
-
2020
- 2020-10-30 DE DE202020106243.3U patent/DE202020106243U1/en active Active
- 2020-11-05 JP JP2020004780U patent/JP3230883U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110984212A (en) * | 2019-12-19 | 2020-04-10 | 中国长江三峡集团有限公司 | Offshore wind turbine combined single-pile foundation and construction method |
| CN112627222A (en) * | 2020-12-17 | 2021-04-09 | 中国长江三峡集团有限公司 | Novel offshore wind power foundation applicable to shallow covering layer and construction method thereof |
| CN112627222B (en) * | 2020-12-17 | 2022-03-11 | 中国长江三峡集团有限公司 | Novel offshore wind power foundation applicable to shallow covering layer and construction method thereof |
| RU2819059C1 (en) * | 2024-02-27 | 2024-05-13 | Общество с ограниченной ответственностью "РусГазШельф" | Underwater system for retention of a structure floating on the surface or in the water column (versions), a pile for it (versions), a weight for such a pile, and a method for installing such an underwater system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE202020106243U1 (en) | 2020-11-13 |
| JP3230883U (en) | 2021-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10267008B2 (en) | Offshore non-driven-in large-diameter monopile foundation structure and construction method | |
| CN211646449U (en) | Combined single-pile foundation of offshore wind turbine | |
| CN111827274B (en) | High-strength grouting method for marine wind power weakly-weathered bedrock single-pile socketed foundation | |
| CN110984214A (en) | Offshore wind power single pile-wing plate-rockfill composite foundation and construction method thereof | |
| CN112627222B (en) | Novel offshore wind power foundation applicable to shallow covering layer and construction method thereof | |
| CN202039382U (en) | Ribbing seabed suction anchor | |
| CN211646450U (en) | Offshore wind power single pile-wing plate-rockfill composite foundation | |
| CN206289651U (en) | A kind of offshore wind power foundation structure of single pile anchoring | |
| CN110984212A (en) | Offshore wind turbine combined single-pile foundation and construction method | |
| CN102400469B (en) | Secant pile drum type foundation and construction method thereof | |
| CN204370469U (en) | A kind of drilled pile long leg jacket offshore wind turbine foundation | |
| WO2022127466A1 (en) | Novel offshore wind turbine foundation suitable for shallow covering layer and construction method therefor | |
| Spagnoli | Some considerations regarding the use of helical piles as foundation for offshore structures | |
| CN212688995U (en) | Rotary pile raft type apron board foundation | |
| CN105297764A (en) | Offshore wind plant fan single pile foundation and construction method thereof | |
| CN110439020A (en) | Marine single-pile foundation with sand pile reinforcing ground | |
| CN206503157U (en) | The embedding rock mixing pile foundation of offshore wind farm | |
| CN204827213U (en) | Double dynamical head digs rig soon | |
| CN211873069U (en) | Composite structure offshore wind turbine wing plate single pile foundation | |
| CN103161160B (en) | A kind of Bidirectional pressure revolves uplift pile method for designing | |
| CN102286971A (en) | Concrete-filled steel tube core column socketed pile | |
| CN212294728U (en) | Pile foundation structure is revolved to jacket | |
| CN110792095B (en) | Multi-pile bearing platform-spiral anchor composite foundation | |
| CN105908773A (en) | Two-stage socketed pile wind turbine foundation for shallow covering stratum foundation of offshore wind plant and construction method | |
| CN207582480U (en) | Marine brace foundation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |