CN113898002B - Barrel-type structure fan foundation with inverted convex bearing platform structure and construction method thereof - Google Patents
Barrel-type structure fan foundation with inverted convex bearing platform structure and construction method thereof Download PDFInfo
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- CN113898002B CN113898002B CN202111365208.XA CN202111365208A CN113898002B CN 113898002 B CN113898002 B CN 113898002B CN 202111365208 A CN202111365208 A CN 202111365208A CN 113898002 B CN113898002 B CN 113898002B
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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
- E02D27/44—Foundations for machines, engines or ordnance
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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
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The invention provides a cylindrical structure fan foundation with an inverted convex bearing platform structure and a construction method thereof, wherein the cylindrical structure fan foundation comprises a cylindrical structure and a bearing platform, the bearing platform is positioned at the top end of the cylindrical structure, the bottom of the bearing platform forms an inverted convex structure at the inner side of the cylindrical structure, the inverted convex structure and the bearing platform are integrally formed, and a reinforcing mesh is arranged in the inverted convex structure; the inverted convex structure is a column body, is positioned below the elevation of the bottom surface of the conventional bearing platform, is excavated mechanically and manually, takes the inner side of the cylindrical structure as a template, is provided with a cushion layer below the bottom surface, is provided with a bottom layer horizontal reinforcing steel bar net and a side reinforcing steel bar net, and finally is integrally poured with the conventional bearing platform concrete. The invention effectively avoids the structural defect of the combined cylinder structure at the joint of the bearing platform and the cylinder structure caused by the abrupt change of structural rigidity by arranging the inverted convex structure to strengthen the control of the horizontal displacement of the top of the cylinder structure, and the connecting structure and the construction method effectively reduce the problem of high cost caused by the increase of engineering quantity due to other treatment measures.
Description
Technical Field
The invention relates to the field of wind power plants, in particular to a barrel-type structure fan foundation with an inverted convex bearing platform structure and a construction method thereof.
Background
The wind turbine foundation is an important component of wind farm construction, and not only is safe and reliable operation of the wind farm related, but also investment of the wind farm is affected. According to the adaptability of geological conditions, the existing common fan foundation forms comprise an expansion type fan foundation and a pile foundation, the expansion type foundation mainly utilizes self gravity to resist the large bending moment load of an upper structure, and when the geological conditions are weaker, the expansion type foundation is adopted after foundation treatment. The pile foundation is adopted under the condition that the natural foundation does not meet the requirements of bearing capacity, deformation and the like of a foundation structure, the vertical effect of piles is utilized to bear the bending moment load of an upper structure, and a bearing platform is arranged to be connected with the foundation piles to form an integral structure. The combined cylindrical structure fan foundation is a cylindrical wall structure formed by using a construction process of a secant pile or an underground continuous wall, and the horizontal directional resistance of soil bodies on the side surfaces of the structure is fully utilized to resist the large bending moment of the fan. The combined cylinder structure is a variable-order surface with abrupt change of rigidity of the whole structure at the joint of the bearing platform and the cylinder structure, and the conventional method is only to adopt reinforcing ribs for pile heads, so that the safety requirement is still difficult to meet, or the method of enlarging the pile diameter and enhancing the rigidity of the cylinder body is adopted, but the problems of huge engineering quantity of the cylinder structure and even overlarge pile diameter are caused, so that the construction is difficult.
Disclosure of Invention
The invention provides a cylindrical structure fan foundation with an inverted convex bearing platform structure and a construction method thereof, wherein a downward inverted convex structure is formed on the inner side of a conventional bearing platform positioned in the cylindrical structure, the structure is excavated mechanically and manually, the inner side of the cylindrical structure is taken as a template, a cushion layer is arranged below the bottom surface, a bottom layer horizontal reinforcing steel bar net and a side reinforcing steel bar net are configured, and finally, the structure and conventional bearing platform concrete are integrally poured; through setting up the horizontal displacement reinforcing control of protruding structure to drum structure top, effectively avoided the combination drum structure at cushion cap and drum type structural junction because the structural defect that structural rigidity abrupt change arouses, effectively reduced other processing measures simultaneously and arouse the engineering volume increase and lead to the problem with high costs.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a fan foundation with a cylindrical structure and an inverted convex bearing platform structure and a construction method thereof are provided, wherein the fan foundation comprises the cylindrical structure and the bearing platform, the bearing platform is positioned at the top end of the cylindrical structure, the bottom of the bearing platform forms an inverted convex structure on the inner side of the cylindrical structure, the inverted convex structure and the bearing platform are integrally formed, and a reinforcing mesh is arranged in the inverted convex structure; the inverted convex structure is a column body and is positioned below the elevation of the bottom surface of the conventional bearing platform.
The periphery of the inverted convex structure takes the inner annular or polygonal surface of the cylinder structure as a boundary, and the bottom surface of the cylinder is a horizontal plane.
The bottom surface of the inverted convex structure is provided with a concrete cushion layer with the thickness not smaller than 10cm, and the strength label of the concrete cushion layer is not lower than C10.
The height of the inverted convex structure is not less than 50cm.
The cylindrical wall structure is formed by the construction process of the occluding piles or the underground continuous wall.
The reinforcing mesh arranged at the bottom of the inverted convex structure comprises horizontal square mesh reinforcing bars, the distance between the transverse and longitudinal reinforcing bars in the square mesh reinforcing bars is not more than 30cm, and the diameter is not less than 12mm.
The periphery of the side face of the inverted convex structural column body is provided with a vertical annular reinforcing steel bar net, the distance between vertical reinforcing steel bars and the distance between annular reinforcing steel bars are not more than 20cm, the diameters of the reinforcing steel bars are not less than 12mm, and the length of the vertical reinforcing steel bars extending into the bearing platform is not less than 35 times of the diameter of the reinforcing steel bars.
The invention relates to a wind turbine, which adopts a barrel-type structure fan foundation with an inverted convex bearing platform structure.
The construction method of the inverted convex bearing platform structure of the invention excavates the inner side of the cylindrical structure below the elevation of the bottom surface of the bearing platform to form the pouring space of the inverted convex structure after the construction of the cylindrical structure is completed,
arranging a reinforcing mesh in the space;
and pouring concrete into the space, and integrally pouring and forming an inverted convex structure and a bearing platform.
When the inner side of the cylindrical structure is excavated, firstly, large-scale machinery is used for excavating, and then, when the inner side of the cylindrical structure is close to the cylindrical structure, the large-scale machinery is manually excavated;
when pouring the inverted convex structure, directly taking the inner side boundary of the cylinder structure as a template to perform concrete pouring.
Compared with the prior art, the invention has at least the following beneficial effects: the invention effectively avoids the structural defect of the combined cylinder structure at the joint of the bearing platform and the cylinder structure caused by the abrupt change of structural rigidity by arranging the inverted convex bearing platform structure to strengthen the control of the inner and outer side displacement of the top of the cylinder structure, and reduces the problem of high cost caused by the increase of construction quantity due to other treatment measures while optimizing the structure.
Drawings
FIG. 1 is a schematic cross-sectional elevation view of one embodiment of the present invention.
Fig. 2 is a schematic top view of one embodiment of the present invention.
Fig. 3 is a schematic view of a reinforcing bar of a partial structure.
In the figure: 1-a conventional bearing platform; 2-a cylinder structure; 3-an inverted convex structure; 4-cushion layer; 5-horizontally-oriented grid steel bars; 6-vertical circumferential reinforcement mesh; 6-1-vertical steel bars; 6-2-ring reinforcing steel bar.
Detailed Description
The invention is explained in detail below with reference to the drawings and the specific embodiments.
Referring to fig. 1 and 3, a drum-type structural fan foundation with an inverted convex-type bearing platform structure and a construction method thereof, the drum-type structural fan foundation comprises a drum-type structure 2 and a bearing platform 1, wherein the bearing platform 1 is positioned at the top end of the drum-type structure 2, the bottom of the bearing platform 1 forms an inverted convex-type structure 3 at the inner side of the drum-type structure 2, the inverted convex-type structure 3 and the bearing platform 1 are integrally formed, and a reinforcing steel bar net is arranged in the inverted convex-type structure 3; the inverted convex structure 3 is a column and is positioned below the elevation of the bottom surface of the conventional bearing platform.
The periphery of the inverted convex structure 3 takes the inner annular or polygonal surface of the cylinder structure 2 as a boundary, and the bottom surface of the cylinder is a horizontal plane.
The bottom surface of the inverted convex structure 3 is provided with a concrete cushion layer with the thickness not smaller than 10cm, and the strength label of the cushion layer concrete is not lower than C10.
The height of the inverted convex structure 3 is not less than 50cm.
Referring to fig. 1 and 2, a cylindrical wall structure is formed for a construction process of a snap pile or an underground diaphragm wall.
The invention also provides a fan foundation, and the inverted convex bearing platform structure is adopted to solve the problem in practical engineering.
An inverted convex structure 3 for a combined cylindrical structure fan foundation is shown in fig. 1 and 2, and is an inverted convex structure 3 of a cylindrical structure 2 formed by a bearing platform 1 and pile foundations.
The inverted convex structure 3 is a column body, is positioned below the elevation of the bottom surface of the conventional bearing platform 1, and the peripheral surface is bounded by an annular or polygonal surface at the inner side of the cylindrical structure 2, and the bottom surface of the column body is generally a horizontal surface.
The concrete cushion layer 4 with the strength of not less than 10cm is arranged below the bottom surface of the column body of the inverted convex structure 3, and the concrete strength label of the cushion layer 4 is generally not lower than C10.
The inverted convex structure 3 and the structure part of the conventional bearing platform 1 are integrally poured, so that the construction joints are not allowed to appear, and the concrete labels are the same.
The inverted convex structure 3 is provided with horizontal grid steel bars 5 at the bottom of the column, the distance between transverse and longitudinal steel bars in the grid steel bars 5 is generally not more than 30cm, and the diameter of the steel bars is not less than 12mm.
The periphery of the side surface of the column body of the inverted convex structure 3 is provided with a vertical annular reinforcing steel bar net 6, the spacing between the vertical reinforcing steel bars 6-1 and the spacing between the annular reinforcing steel bars 6-2 are not more than 20cm, and the diameter d of the reinforcing steel bars is not less than 12mm; the length of the vertical steel bar 6-1 extending into the bottom surface of the bearing platform 1 is not less than 35d.
According to the construction method of the inverted convex bearing platform structure, after the construction of the cylindrical structure 2 is completed, the inner side of the cylindrical structure 2 below the elevation of the bottom surface of the bearing platform is excavated to form an inverted convex structure pouring space, and a reinforcing mesh is arranged in the space; and pouring concrete into the space, and integrally pouring and forming the inverted convex structure 3 and the bearing platform 1.
The height of the inverted convex structure 3 is generally not less than 50cm, mechanical excavation is adopted in a large range, and manual excavation is adopted at the contact part of the edge of the column and the cylindrical structure 2.
The inverted convex structure 3 directly takes the inner side boundary of the cylinder structure 2 as a template to perform concrete pouring.
Claims (7)
1. The utility model provides a drum type structure fan foundation with protruding type cushion cap structure, its characterized in that includes drum type structure (2) and cushion cap (1), and cushion cap (1) are located the top of drum type structure (2), and the bottom of cushion cap (1) forms protruding type structure (3) in drum type structure (2) inboard, and protruding type structure (3) and cushion cap (1) integration shaping are arranged in protruding type structure (3); the inverted convex structure (3) is a column and is positioned below the elevation of the bottom surface of the bearing platform; the periphery of the inverted convex structure (3) takes the inner annular or polygonal surface of the cylinder structure (2) as a boundary, and the bottom surface of the cylinder is a horizontal plane; the height of the inverted convex structure (3) is not less than 50cm; the bottom surface of the inverted convex structure (3) is provided with a concrete cushion layer with the thickness not smaller than 10cm, and the strength label of the cushion layer concrete is not lower than C10.
2. The fan foundation with the inverted convex bearing platform structure of claim 1, wherein the cylindrical structure (2) is a cylindrical wall structure formed by a construction process of a snap pile or an underground continuous wall.
3. The cylindrical structural fan foundation with the inverted convex bearing platform structure according to claim 1, wherein the reinforcing mesh arranged at the bottom of the inverted convex structure (3) comprises horizontal square mesh reinforcing bars (5), and the distance between transverse and longitudinal reinforcing bars in the square mesh reinforcing bars (5) is not more than 30cm and the diameter is not less than 12mm.
4. The cylindrical structure fan foundation with the inverted convex bearing platform structure according to claim 1, wherein the periphery of the side face of the column body of the inverted convex structure (3) is provided with a vertical annular reinforcing steel bar net (6), the distance between the vertical reinforcing steel bars (6-1) and the distance between the annular reinforcing steel bars (6-2) are not more than 20cm, the diameters of the reinforcing steel bars are not less than 12mm, and the length of the vertical reinforcing steel bars (6-1) extending into the bearing platform (1) is not less than 35 times of the diameter of the reinforcing steel bars.
5. A wind turbine generator set, characterized in that a drum-type structure fan foundation with an inverted convex bearing platform structure according to any one of claims 1-4 is adopted.
6. The method for constructing an inverted convex bearing platform structure according to any one of claims 1 to 4, wherein after the construction of the cylindrical structure (2) is completed, a space for pouring the inverted convex structure is formed by excavating the inner side of the cylindrical structure (2) below the elevation of the bottom surface of the bearing platform,
arranging a reinforcing mesh in the space;
and pouring concrete into the space, and integrally pouring and forming an inverted convex structure (3) and a bearing platform (1).
7. The construction method according to claim 6, wherein the inner side of the cylindrical structure (2) is excavated by a large machine, and then the inner side of the cylindrical structure is manually excavated when the cylindrical structure is approached;
when pouring the inverted convex structure (3), directly taking the inner side boundary of the cylinder structure as a template to perform concrete pouring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111365208.XA CN113898002B (en) | 2021-11-17 | 2021-11-17 | Barrel-type structure fan foundation with inverted convex bearing platform structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111365208.XA CN113898002B (en) | 2021-11-17 | 2021-11-17 | Barrel-type structure fan foundation with inverted convex bearing platform structure and construction method thereof |
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| Publication Number | Publication Date |
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| CN113898002A CN113898002A (en) | 2022-01-07 |
| CN113898002B true CN113898002B (en) | 2023-09-29 |
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| CN202111365208.XA Active CN113898002B (en) | 2021-11-17 | 2021-11-17 | Barrel-type structure fan foundation with inverted convex bearing platform structure and construction method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966115A (en) * | 2012-12-18 | 2013-03-13 | 湘电风能有限公司 | Foundation of wind-driven generator unit |
| CN110607801A (en) * | 2019-10-10 | 2019-12-24 | 中国电建集团北京勘测设计研究院有限公司 | Improve fan cushion cap subassembly of stake resistance to plucking bearing capacity |
| CN216194894U (en) * | 2021-11-17 | 2022-04-05 | 华能清能通榆电力有限公司 | Cylindrical structure fan foundation with inverted convex bearing platform structure and wind turbine generator |
-
2021
- 2021-11-17 CN CN202111365208.XA patent/CN113898002B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966115A (en) * | 2012-12-18 | 2013-03-13 | 湘电风能有限公司 | Foundation of wind-driven generator unit |
| CN110607801A (en) * | 2019-10-10 | 2019-12-24 | 中国电建集团北京勘测设计研究院有限公司 | Improve fan cushion cap subassembly of stake resistance to plucking bearing capacity |
| CN216194894U (en) * | 2021-11-17 | 2022-04-05 | 华能清能通榆电力有限公司 | Cylindrical structure fan foundation with inverted convex bearing platform structure and wind turbine generator |
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| Publication number | Publication date |
|---|---|
| CN113898002A (en) | 2022-01-07 |
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