CN210031898U - Wind power generation tower foundation - Google Patents
Wind power generation tower foundation Download PDFInfo
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- CN210031898U CN210031898U CN201920765648.6U CN201920765648U CN210031898U CN 210031898 U CN210031898 U CN 210031898U CN 201920765648 U CN201920765648 U CN 201920765648U CN 210031898 U CN210031898 U CN 210031898U
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- 238000010248 power generation Methods 0.000 title claims abstract description 30
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 50
- 239000004567 concrete Substances 0.000 claims abstract description 20
- 238000010276 construction Methods 0.000 claims description 12
- 239000002689 soil Substances 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 239000011384 asphalt concrete Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 2
- 238000012856 packing Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 100
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000010813 municipal solid waste Substances 0.000 description 5
- 239000011241 protective layer Substances 0.000 description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
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Abstract
The utility model discloses a wind power generation tower basis, include: lay concrete cushion, buffer protection layer, the template layer of strutting and the filling layer of locating the foundation ditch bottom, the foundation ditch sets up to the bowl type, and buffer protection layer sets up on the inside wall of foundation ditch, and buffer protection layer inboard is provided with the template layer of strutting, and the inboard packing of template layer of strutting has the filling layer. The filling layer includes: the lower reinforced concrete filling layer, the backfill layer and the upper reinforced concrete filling layer are arranged on the foundation pit, the lower portion, located on the foundation pit, of the lower reinforced concrete filling layer is a first cylinder, the upper portion, located on the lower reinforced concrete filling layer, of the backfill layer is a circular truncated cone, the upper portion, located on the backfill layer, of the upper reinforced concrete filling layer is a second cylinder, the diameter of the second cylinder is larger than that of the first cylinder, the small-diameter end of the circular truncated cone is connected with the first cylinder, and the large-diameter end of the circular truncated cone is connected with the second cylinder. The bearing capacity is high, the stability is good, the consumption of reinforced concrete is saved, the cost is reduced, and the damage to the environment is reduced.
Description
Technical Field
The utility model relates to a wind power generation tower basis especially relates to a wind power generation tower basis of construction on land.
Background
Wind power generation refers to converting kinetic energy of wind into electric energy. The wind power generation is very environment-friendly, and the wind energy is huge, so that the wind power generation is increasingly paid attention by various countries in the world. At present, all countries pay great attention to the construction of wind power engineering, and the wind power engineering is divided into land wind power engineering and offshore wind power engineering. Although the generated energy of the offshore wind power plant is 1.4 times of that of the onshore wind power plant, the offshore wind power plant has a complex basic structure, high design difficulty, high investment cost and difficulty in equipment maintenance, the manufacturing cost is 2-3 times of that of the onshore wind power plant, and the economy of the offshore wind power plant is still not as good as that of the onshore wind power plant. At present, more land wind power plants are built in China.
Land wind power is firstly built in plains and gobi areas, wind power projects in the plains need to occupy a large amount of cultivated land resources, and in addition, a large amount of high-voltage transmission lines need to be built in a matched mode to transmit power when wind power projects in the gobi areas are built, so that the construction cost is increased. To solve these problems, wind power engineering is gradually shifting to mountainous areas around cities.
The design and installation investment of the wind power tower foundation in the mountainous area accounts for 18% of the total cost, and most of wind load borne by the upper fan structure acts on the horizontal direction. Therefore, the horizontal bearing capacity of the foundation must be effectively improved and the horizontal displacement of the foundation must be controlled so as to ensure the safe, economic and efficient operation of the fan. At present, the wind power tower foundations in mountainous areas mainly comprise gravity foundations, beam slab foundations and rock bolt foundations, and the most gravity foundations are cylindrical. However, the wind power tower foundation in the mountainous area has the following disadvantages:
(1) the gravity type extended foundation and the beam slab type foundation are formed by pouring large-volume reinforced concrete, the diameter of the bottom of the gravity type extended foundation can reach 15-25 m, the mass of the gravity type extended foundation is about 1500-4500 t, and the consumption of the reinforced steel bar and the concrete is large. And the pouring construction of the foundation belongs to the large-volume concrete construction, and the construction process requirements of pouring and maintenance are high.
(2) The rock anchor rod foundation adopts the high-strength prestressed anchor rod to improve the foundation bearing capacity, the anchor rod drilling construction workload is large, the construction process is complex, professional construction machinery is required, the anchor rod corrosion prevention requirement is high, and the construction cost is greatly increased. In addition, the wind turbine tower foundation is subjected to the horizontal load and the cyclic load action generated by wind load for a long time, so that the anchor rod is easy to fatigue fracture and lose efficacy, and the bearing performance of the foundation is influenced.
(3) Traditional mountain area wind power tower cylinder basis and ground are rigid connection, lack certain flexibility, lead to under the extreme climatic conditions, the basis often takes place wholly to topple and wind power tower blocks heavy engineering accidents such as waist rupture easily.
(4) A large amount of waste muck is generated during foundation pit excavation, and the muck is mostly stacked near wind power engineering, so that not only is the growth of surrounding vegetation hindered, but also the mountain area environment is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a bowl type wind power generation pylon basis is provided, have the advantage that bearing capacity is high and stability is good to can practice thrift reinforcing bar, concrete use amount, reduce cost reduces the destruction to the environment.
A wind power generation tower foundation disposed within a foundation pit, the foundation comprising:
a concrete cushion layer laid at the bottom of the foundation pit, which is characterized in that,
the foundation further comprises: the concrete cushion comprises a buffer protection layer, a supporting template layer and a filling layer, wherein the foundation pit is arranged in a bowl shape, the buffer protection layer is arranged on the inner side wall of the foundation pit, the supporting template layer is arranged on the inner side of the buffer protection layer, the filling layer is filled on the inner side of the supporting template layer, and the buffer protection layer, the supporting template layer and the filling layer are all arranged on the upper portion of the concrete cushion;
the filling layer includes: the reinforced concrete foundation pit comprises a lower reinforced concrete filling layer, a backfill layer and an upper reinforced concrete filling layer, wherein the lower part of the lower reinforced concrete filling layer, which is positioned in the foundation pit, is provided with a first cylinder, the upper part of the backfill layer, which is positioned in the lower reinforced concrete filling layer, is provided with a truncated cone, the upper part of the upper reinforced concrete filling layer, which is positioned in the backfill layer, is provided with a second cylinder, the diameter of the second cylinder is larger than that of the first cylinder, the small-diameter end of the truncated cone is connected with the first cylinder, and the large-diameter end of the truncated cone is connected with the second cylinder.
Preferably, the buffer protection layer is arranged as a rubber particle asphalt concrete layer.
Preferably, the filler of the backfill layer comprises backfill soil and construction waste fixed by grouting slurry.
Preferably, the included angle between the generatrix on the side wall of the circular truncated cone and the horizontal ground is 10-15 degrees.
Preferably, the wind power generation tower is arranged on the upper reinforced concrete filling layer and is fixedly connected with the filling layer.
Preferably, a plurality of reinforcing rods are arranged inside the tower barrel of the wind power generation tower, and vertically penetrate through the upper reinforced concrete filling layer, the backfill layer and the lower reinforced concrete filling layer.
Preferably, an anchor plate is further arranged between the tower barrel of the wind power generation tower and the upper reinforced concrete filling layer.
Preferably, the high-strength anchor bolt is located outside a tower barrel of the wind power generation tower, and the high-strength anchor bolt penetrates through the bottom of the tower barrel and the anchor plate and extends into the lower reinforced concrete filling layer.
Preferably, reinforcing ribs are further arranged between the concrete cushion layer and the lower reinforced concrete filling layer, and the reinforcing ribs are arranged around the center of the foundation pit in an array mode.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the utility model discloses wind power generation tower basis, foundation ditch set up to the bowl type, are provided with the buffering protective layer on the inside wall of foundation ditch, and buffering protective layer inboard is provided with and struts the template layer, and it has the filling layer to strut the inboard packing of template layer. The buffer protective layer can protect the internal reinforcing steel bars of the foundation, prevent the internal reinforcing steel bar structure of the foundation from being corroded, and simultaneously has a supporting function on the soil body of the side wall of the foundation pit, particularly when the buffer protective layer is a rubber particle asphalt concrete layer, the buffer protective layer can absorb the side pressure of the soil body of the side wall of the foundation pit to the foundation, buffer the circulating wind load, the earthquake and other dynamic loads, change the connection between the foundation and the soil body of the side wall of the foundation pit into flexible connection, greatly improve the lateral movement resistance of the foundation, and has stability superior,
2) the lower part that lower reinforced concrete filling layer is located the foundation ditch sets up to first cylinder, the upper portion that backfill layer is located reinforced concrete filling layer down sets up to the round platform body, the upper portion that goes up reinforced concrete filling layer and is located backfill layer sets up to the second cylinder, the diameter of second cylinder is greater than the diameter of first cylinder, the path end and the first cylinder of round platform body are connected, the path end and the second cylinder of round platform body are connected, the "big end down" bowl type structure of foundation ditch, the antidumping performance of corresponding basis in the foundation ditch has been improved, also improve the vertical bearing capacity of basis simultaneously greatly.
The backfill layer in the middle of the filling layer is a round table body with a large upper part and a small lower part, so that the backfill layer is easy to tap when concrete is poured, and the defect that a regular cone or cylinder type foundation is difficult to tap is overcome; the utility model discloses the side surface of the round platform body on backfill layer is the inclined plane that becomes certain contained angle with level ground, therefore the side surface of round platform body has increased the area of contact of basis and foundation ditch lateral wall soil body, has improved the bearing capacity on basis.
3) The tower barrel of the wind power generation tower is connected with the foundation through the high-strength anchor bolts, compared with the traditional method that the tower barrel depends on the foundation ring as a connecting component, the high-strength anchor bolts do not need to be imported from abroad, and the using amount of reinforcing steel bars is greatly saved.
4) Engineering garbage, backfill dug out of a foundation pit and other engineering wastes are used as fillers in the backfill layer in the middle of the filling layer, so that the consumption of concrete is greatly saved, the engineering garbage is changed into valuable, and the effects of saving resources and protecting the environment are realized.
Drawings
FIG. 1 is a schematic structural view of a wind power tower foundation of the present invention;
in the figure: 1-buffer protection layer, 2-support template layer, 3-filling layer, 31-lower reinforced concrete filling layer, 32-backfill layer, 33-upper reinforced concrete filling layer, 4-concrete cushion layer, 5-high-strength anchor bolt, 6-reinforcing rod, 7-anchor plate, 8-reinforcing rib, 9-soil body and 10-wind power generation tower.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided in conjunction with the accompanying drawings and specific embodiments for further understanding the objects, aspects and functions of the present invention, but not for limiting the scope of the appended claims.
As shown in fig. 1, the wind power tower foundation is arranged in a foundation pit, and the foundation comprises: the concrete cushion layer 4, the buffer protection layer 1, the supporting template layer 2 and the filling layer 3 are laid at the bottom of the foundation pit, the foundation pit is arranged in a bowl shape, the buffer protection layer 1 is arranged on the inner side wall of the foundation pit, the supporting template layer 2 is arranged on the inner side of the buffer protection layer 1, the filling layer 3 is filled on the inner side of the supporting template layer 2, and the buffer protection layer 1, the supporting template layer 2 and the filling layer 3 are all arranged on the upper portion of the concrete cushion layer 4;
the filling layer 3 includes: the reinforced concrete foundation pit structure comprises a lower reinforced concrete filling layer 31, a backfill layer 32 and an upper reinforced concrete filling layer 33, wherein the lower part of the lower reinforced concrete filling layer 31, which is positioned in a foundation pit, is provided with a first cylinder, the upper part of the backfill layer 32, which is positioned in the lower reinforced concrete filling layer 31, is provided with a truncated cone, the upper part of the upper reinforced concrete filling layer 33, which is positioned in the backfill layer 32, is provided with a second cylinder, the diameter of the second cylinder is larger than that of the first cylinder, the small-diameter end of the truncated cone is connected with the first cylinder, and the large-diameter end of the truncated cone is connected with the second cylinder.
The bowl-shaped structure with the large upper part and the small lower part of the foundation pit improves the anti-overturning performance of the corresponding foundation in the foundation pit and also greatly improves the vertical bearing capacity of the foundation. This is because when wind power generation tower 10 received wind-force, the tower section of thick bamboo of wind power generation tower 10 can receive the effect of horizontal load, not only can make the basis produce horizontal displacement, also can make the basis produce the vertical displacement who upwards pulls out, the basis reduces the horizontal displacement volume of basis through the great cross sectional area of upper portion reinforced concrete filling layer, reduces the vertical displacement volume that pulls out on the basis through the less reinforced concrete filling layer cross sectional area of basis lower part to the antidumping performance of basis has been improved, the vertical bearing capacity of basis also is greatly improved simultaneously.
The backfill layer 32 in the middle of the filling layer 3 is a round table body with a large upper part and a small lower part, is easy to tap when concrete is poured, and overcomes the defect that a regular cone or cylinder type foundation is difficult to tap; the utility model discloses the side surface of the round platform body of backfill layer 32 is the inclined plane that becomes certain contained angle with level ground, therefore the side surface of the round platform body has increased the area of contact of basis and foundation ditch lateral wall soil body, has improved the bearing capacity on basis.
The utility model discloses it is preferred to set up the buffer protection layer into rubber granule asphalt concrete layer. The rubber particle asphalt concrete layer can adsorb the lateral pressure of the foundation pit side wall soil body to the foundation, buffer the circulating wind load, the earthquake and other dynamic loads, change the connection between the foundation and the foundation pit side wall soil body 9 into flexible connection, greatly improve the lateral movement resistance of the foundation and have stability superior to that of the traditional foundation. The rubber particle asphalt concrete layer has elastic deformation performance, releases huge bending moment transmitted when the wind power generation tower is subjected to wind load, improves the cyclic bearing performance and stability of the foundation, and coordinates the deformation of the foundation, the wind power generation tower 10 at the upper part of the foundation and soil around a foundation pit, so that the whole wind power generation structure has certain space regulation capacity. In addition, the rubber particle asphalt concrete layer protects the middle steel bar structure in the filling layer and prevents the steel bar structure from being corroded, so that the service life of the foundation is prolonged.
The utility model discloses preferably regard backfill soil, building rubbish and other engineering rubbish as the filler to it is fixed through the slip casting, combine foretell filler to form backfill layer 32. Greatly saves the consumption of concrete, changes engineering garbage into valuable, and realizes the functions of saving resources and protecting the environment.
Experiments show that when the included angle between the bus on the side wall of the circular truncated cone and the horizontal ground is set to be 10-15 degrees, the comprehensive performance of the tower footing is optimal.
The wind power generation tower 10 is arranged on the upper reinforced concrete filling layer, and the wind power generation tower 10 is fixedly connected with the filling layer 3 through the high-strength anchor bolts 5. A plurality of reinforcing rods 6 are arranged inside a tower barrel of the wind power generation tower 10, and the plurality of reinforcing rods 6 vertically penetrate through the upper reinforced concrete filling layer 33, the backfill layer 32 and the lower reinforced concrete filling layer 31, so that the whole tower foundation is combined more tightly, and the bearing capacity of the tower foundation is improved.
An anchor plate 7 is further arranged between the tower barrel of the wind power generation tower 10 and the upper reinforced concrete filling layer 33. The high-strength anchor bolts 5 are located outside the tower barrel of the wind power generation tower 10, and the high-strength anchor bolts 5 penetrate through a bottom flange and an anchor plate 7 of the tower barrel and extend into the lower reinforced concrete filling layer 31, so that the tower barrel of the wind power generation tower 10 is not prone to toppling when being subjected to wind load. And the high-strength anchor bolts 5 are used as connecting and fixing parts of the tower barrel and the foundation of the wind power generation tower 10, compared with the traditional method that the foundation ring is used as a connecting component, the high-strength anchor bolts do not need to be imported from foreign countries, and the using amount of reinforcing steel bars is greatly saved.
Reinforcing ribs 8 are further arranged between the concrete cushion 4 and the lower reinforced concrete filling layer 31, and the reinforcing ribs 8 are arranged around the center of the foundation pit in an array mode. When the filling layer 3 is filled into the supporting formwork layer 2, the supporting formwork layer 2 can be prevented from being inclined. But also the bearing capacity and stability of the whole foundation.
The present invention is not limited to the above embodiments, and all improvements made based on the concept, principle, structure and method of the present invention are all within the protection scope of the present invention.
Claims (9)
1. A wind power generation tower foundation disposed within a foundation pit, the foundation comprising:
a concrete cushion layer laid at the bottom of the foundation pit, which is characterized in that,
the foundation further comprises: the concrete cushion comprises a buffer protection layer, a supporting template layer and a filling layer, wherein the foundation pit is arranged in a bowl shape, the buffer protection layer is arranged on the inner side wall of the foundation pit, the supporting template layer is arranged on the inner side of the buffer protection layer, the filling layer is filled on the inner side of the supporting template layer, and the buffer protection layer, the supporting template layer and the filling layer are all arranged on the upper portion of the concrete cushion;
the filling layer includes: the reinforced concrete foundation pit comprises a lower reinforced concrete filling layer, a backfill layer and an upper reinforced concrete filling layer, wherein the lower part of the lower reinforced concrete filling layer, which is positioned in the foundation pit, is provided with a first cylinder, the upper part of the backfill layer, which is positioned in the lower reinforced concrete filling layer, is provided with a truncated cone, the upper part of the upper reinforced concrete filling layer, which is positioned in the backfill layer, is provided with a second cylinder, the diameter of the second cylinder is larger than that of the first cylinder, the small-diameter end of the truncated cone is connected with the first cylinder, and the large-diameter end of the truncated cone is connected with the second cylinder.
2. A wind power tower foundation according to claim 1 wherein said buffer layer is provided as a rubber particle asphalt concrete layer.
3. The wind power tower foundation of claim 1 wherein the backfill comprises backfill soil and construction waste secured by grouting slurry.
4. The wind power tower foundation of claim 1 wherein the included angle between the generatrix on the circular truncated cone side wall and the horizontal ground is 10 ° to 15 °.
5. The wind power tower foundation of claim 1 wherein a wind power tower is disposed on said upper reinforced concrete fill level, said wind power tower being fixedly connected to said fill level by high strength anchor bolts.
6. The wind power tower foundation of claim 5, wherein a plurality of reinforcing rods are disposed within the tower of the wind power tower and vertically penetrate through the upper reinforced concrete filled layer, the backfill layer and the lower reinforced concrete filled layer.
7. The wind power tower foundation of claim 5, wherein an anchor plate is further disposed between the tower of the wind power tower and the upper reinforced concrete filling layer.
8. The wind power tower foundation of claim 7 wherein said high strength anchor is located outside the tower of said wind power tower, said high strength anchor passing through the bottom of said tower and said anchor plate and extending into said lower reinforced concrete filled layer.
9. The wind power tower foundation of claim 1 wherein said concrete pad and said lower reinforced concrete fill are further provided with reinforcing ribs, a plurality of said reinforcing ribs being arranged in an array around the center of said foundation pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920765648.6U CN210031898U (en) | 2019-05-24 | 2019-05-24 | Wind power generation tower foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920765648.6U CN210031898U (en) | 2019-05-24 | 2019-05-24 | Wind power generation tower foundation |
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| Publication Number | Publication Date |
|---|---|
| CN210031898U true CN210031898U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920765648.6U Expired - Fee Related CN210031898U (en) | 2019-05-24 | 2019-05-24 | Wind power generation tower foundation |
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| CN (1) | CN210031898U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113417310A (en) * | 2021-06-02 | 2021-09-21 | 中建二局第四建筑工程有限公司 | Construction method for foundation of column cap type elevator |
-
2019
- 2019-05-24 CN CN201920765648.6U patent/CN210031898U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113417310A (en) * | 2021-06-02 | 2021-09-21 | 中建二局第四建筑工程有限公司 | Construction method for foundation of column cap type elevator |
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