CN115234445A - Wind power tower, foundation of wind power tower and construction process of foundation - Google Patents

Abstract

The invention discloses a wind power tower cylinder, a foundation of the wind power tower cylinder and a construction process of the foundation, wherein the foundation of the wind power tower cylinder comprises a body and an anchoring piece, the body is molded by plain concrete through casting, at least part of the anchoring piece is embedded in the body, the distance between the lower end surface of the anchoring piece and the bottom surface of the body is not more than 50% of the total height of the body, and the rest part of the anchoring piece protrudes out of the upper end surface of the body and is used for being connected with the concrete tower cylinder. The foundation of the wind power tower provided by the invention has the advantages of small volume, low construction difficulty and low manufacturing cost.

Description

Wind power tower, foundation of wind power tower and construction process of foundation

Technical Field

The invention relates to the technical field of fans, in particular to a wind power tower, a foundation of the wind power tower and a construction process of the foundation.

Background

With the vigorous development of clean energy, wind power projects in China are facing large-scale construction climax, which puts forward higher requirements on construction efficiency and construction quality. With the large-scale development of the unit, the fan foundation in the related technology has the defects of large volume, high construction difficulty and high manufacturing cost.

Disclosure of Invention

The present invention is directed to solving, at least in part, one of the technical problems in the related art.

Therefore, the embodiment of the invention provides a foundation of a wind power tower, and the foundation of the wind power tower has the advantages of small volume, low construction difficulty and low manufacturing cost.

The embodiment of the invention also provides a wind power tower cylinder.

The embodiment of the invention also provides a foundation construction process of the wind power tower barrel.

The foundation of the wind power tower cylinder comprises a body and an anchoring piece, wherein the body is formed by casting plain concrete; at least part of the anchoring piece is embedded in the body, the distance between the lower end face of the anchoring piece and the bottom face of the body is not larger than 50% of the total height of the body, and the rest of the anchoring piece protrudes out of the upper end face of the body and is used for being connected with a concrete tower barrel.

According to the foundation of the wind power tower cylinder, the body is formed by pouring plain concrete, only the anchoring part used for being connected with the concrete tower cylinder is pre-buried inside the foundation, the anchoring part can play a role of a steel bar, and additional steel bars do not need to be matched, so that a large amount of steel is saved, and the manufacturing cost of the foundation of the wind power tower cylinder is reduced. Moreover, the body and the anchoring piece can ensure the structural performance of the foundation of the wind power tower drum, and meanwhile, the size of the foundation of the wind power tower drum is effectively reduced, so that the size of the excavated foundation pit is not required to be too large, and the construction difficulty is low.

In some embodiments, the body is cast from C40 concrete.

In some embodiments, the body is a cylindrical structure, and the inner cavity of the body is filled with a backfill soil layer.

In some embodiments, the foundation of the wind tower further includes a first rubble concrete layer and a second rubble concrete layer, the first rubble concrete layer and the second rubble concrete layer are both cast in the inner cavity of the body, and the backfill layer is located between the first rubble concrete layer and the second rubble concrete layer.

In some embodiments, the anchor comprises:

the anchor rods are distributed at intervals along the circumferential direction of the body;

the top flange is connected with the upper ends of the anchor rods; and

the bottom flange is connected with the lower ends of the anchor rods and is embedded in the body.

In some embodiments, the anchor includes a plurality of anchor lines spaced circumferentially along the body.

In some embodiments, the body is hollow cylindrical and the interior cavity of the body is cylindrical.

In some embodiments, the wind power tower further comprises a reinforcing layer formed on the periphery of the body, the reinforcing layer is formed by pouring rubble concrete, the outer contour of the reinforcing layer is in a frustum shape, and the diameter of the periphery of the reinforcing layer increases from bottom to top.

The wind power tower cylinder comprises a foundation and a concrete tower cylinder, wherein the foundation is the foundation of the wind power tower cylinder in any one of the embodiments; the concrete tower drum is connected with the anchoring part of the foundation, and the drum wall of the concrete tower drum is vertical to the ground.

The technical advantages of the wind power tower according to the embodiment of the invention are the same as the basic technical advantages of the wind power tower in the above embodiment, and are not described herein again.

In some embodiments, the concrete tower is an externally prestressed concrete tower.

In some embodiments, the concrete tower includes a lower barrel section, an upper barrel section, and a transfer ring beam, the lower barrel section being connected to the anchor; the outer diameter of the upper cylinder section is smaller than that of the lower cylinder section, and the length of the upper cylinder section is matched with that of the fan blade; the conversion ring beam is connected with the upper end of the lower cylinder section and the lower end of the upper cylinder section.

In some embodiments, the relationship between the outer diameter D of the transfer ring beam and the outer diameter D of the upper barrel section is: d is less than D +2m.

The foundation construction process of the wind power tower barrel according to the embodiment of the invention comprises the following steps:

excavating a foundation pit on the construction ground, and placing an anchoring part in the foundation pit;

installing a template in the foundation pit and pouring plain concrete to form a body;

pouring rubble concrete on the periphery of the body;

the inner cavity of the body is backfilled with soil.

The foundation construction process of the wind power tower drum according to the embodiment of the invention has the same technical advantages as the foundation of the wind power tower drum in the embodiment, and also has the advantages of small volume, low construction difficulty and low manufacturing cost.

Drawings

FIG. 1 is a cross-sectional view of a wind tower according to an embodiment of the present invention.

Fig. 2 is an enlarged view a in fig. 1.

Fig. 3 is an enlarged view B in fig. 1.

Fig. 4 is a sectional view C of fig. 1.

Fig. 5 is a sectional view D in fig. 1.

Fig. 6 is a sectional view E of fig. 1.

Reference numerals:

10. a foundation of a wind power tower; 20. a concrete tower tube; 1. a body; 2. a reinforcing layer; 3. an anchoring member; 31. an anchor rod; 32. a bottom flange; 33. a top flange; 4. backfilling a soil layer; 5. a first rubble concrete layer; 6. a second rubble concrete layer; 7. an upper barrel section; 8. a lower barrel section; 9. and (5) converting the ring beam.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The foundation 10 of a wind tower according to an embodiment of the invention is described below with reference to fig. 1-3.

The foundation 10 of the wind power tower cylinder according to the embodiment of the invention comprises a body 1 and an anchoring piece 3. The body 1 is cast from plain concrete. At least part of the anchoring piece 3 is embedded in the body 1, the distance between the lower end surface of the anchoring piece 3 and the bottom surface of the body 1 is not more than 50 percent of the total height of the body 1, and the rest part of the anchoring piece 3 protrudes out of the upper end surface of the body 1 and is used for being connected with the concrete tower barrel 20. The concrete tower cylinder 20 is a concrete tower cylinder 20 with a cylinder wall vertical to the bottom surface and adopting an external prestress system.

According to the foundation 10 of the wind power tower cylinder, provided by the embodiment of the invention, the body 1 is formed by pouring plain concrete, only the anchoring piece 3 used for being connected with the concrete tower cylinder 20 is embedded in the body, the anchoring piece 3 can play a role of a steel bar, and extra steel bars do not need to be matched, so that a large amount of steel is saved, and the manufacturing cost of the foundation 10 of the wind power tower cylinder is reduced. Moreover, the body 1 and the anchoring piece 3 can ensure the structural performance of the foundation 10 of the wind power tower cylinder, and meanwhile, the size of the foundation 10 of the wind power tower cylinder is effectively reduced, so that the size of an excavated foundation pit is not required to be too large, and the construction difficulty is low.

Illustratively, the distance between the lower end surface of the anchor 3 and the bottom surface of the body 1 may be 50%, 40%, 30%, 20%, 10%, 0%, etc. of the total height of the body 1.

In some embodiments, the body 1 is cast from C40 concrete. That is, the plain concrete of the molded body 1 is C40 concrete, and the strength of the body 1 thus manufactured satisfies stable support of the concrete tower tube 20.

In some embodiments, as shown in fig. 2, the body 1 is a cylindrical structure, and the inner cavity of the body 1 is filled with a backfill layer 4.

The backfill soil layer 4 is formed by backfilling soil excavated during foundation pit excavation in construction, the backfill soil layer 4 is filled in the inner cavity of the body 1, the overall structure performance of the foundation 10 of the wind power tower cylinder is further improved, and meanwhile, the manufacturing cost and the construction difficulty of the foundation 10 of the wind power tower cylinder are further reduced. In some embodiments, the foundation 10 of the wind tower further comprises a first rubble concrete layer 5 and a second rubble concrete layer 6. The first rubble concrete layer 5 and the second rubble concrete layer 6 are both poured and formed in the inner cavity of the body 1, and the backfill soil layer 4 is located between the first rubble concrete layer 5 and the second rubble concrete layer 6.

The upper end opening and the lower extreme opening of the inner chamber of body 1 are sealed respectively to first rubble concrete layer 5 and second rubble concrete layer 6, avoid being located backfill soil layer 4 loss in the inner chamber, have further guaranteed wind power tower cylinder's basic 10's structural performance.

In some embodiments, as shown in fig. 2, anchor 3 includes an anchor rod 31, a top flange 33, and a bottom flange 32. The stock 31 has a plurality ofly and along the circumference interval distribution of body 1, and top flange 33 links to each other with the upper end of a plurality of stocks 31, and bottom flange 32 links to each other and pre-buried in body 1 with the lower extreme of a plurality of stocks 31.

Top flange 33 and end flange 32 are the steel flange, and both link to each other with a plurality of stock 31, guarantee a plurality of stock 31's relatively fixed, and then guarantee that its is pre-buried in body 1 back, the protrusion can accurately link to each other with concrete tower section of thick bamboo 20 in body 1's part.

As shown in fig. 4, the concrete tower tube 20 includes a plurality of tensioned external prestressed cables, also steel strands, located in the inner cavity thereof, the steel strands are in one-to-one correspondence with the anchor rods 31, and the circumferential distribution positions of the steel strands along the concrete tower tube 20 correspond to the circumferential distribution positions of the anchor rods 31 along the body 1.

Illustratively, the plurality of steel strands within the concrete tower 20 are of different lengths, as shown in fig. 5, wherein the upper ends of four steel strands are located at the lower middle of the concrete tower 20 and are connected to the flanges at that position, and as shown in fig. 6, the upper ends of the remaining twelve steel strands extend to the upper end of the concrete tower 20 and are connected to the flanges at that position.

Alternatively, the anchoring member 3 may be a plurality of anchor cables, and the plurality of anchor cables are distributed at intervals along the circumferential direction of the body 1. The anchor cable can also be used to connect the foundation 10 of the wind tower to the concrete tower 20.

The foundation 10 of the wind power tower barrel further comprises a reinforcing layer 2 formed on the periphery of the body 1, and the reinforcing layer 2 is formed by pouring rubble concrete, so that the structural performance of the foundation 10 of the wind power tower barrel is further guaranteed.

As shown in fig. 2, the body 1 has a hollow cylindrical shape, and the inner cavity of the body 1 has a cylindrical shape. The outer contour of the reinforcing layer 2 is frustum-shaped, and the diameter of the periphery of the reinforcing layer 2 is gradually increased from bottom to top.

When the wind power tower cylinder's of making basis 10 had guaranteed structural performance from this, whole volume is also littleer, and the foundation ditch of digging can be for the frustum shape hole with the periphery matching of enhancement layer 2, need not reassemble the template when pouring shaping enhancement layer 2, has further reduced wind power tower cylinder's the construction degree of difficulty of basis 10.

Alternatively, the outer contour of the reinforcement layer 2 may be square, cylindrical or another regular or irregular pattern.

The wind power tower according to the embodiment of the invention comprises a foundation and a concrete tower 20, the foundation being the foundation 10 of the wind power tower of any of the embodiments described above. The concrete tower tube 20 is connected with the anchoring piece 3 of the foundation, and the wall of the concrete tower tube 20 is vertical to the ground.

The technical advantages of the wind power tower according to the embodiment of the present invention are the same as the technical advantages of the foundation 10 of the wind power tower in the above embodiment, and are not described herein again.

In some embodiments, the concrete drum 20 is an externally prestressed concrete drum. Therefore, the self weight of the concrete tower barrel 20 is smaller, replacement and construction are easier, and the foundation 10 of the wind power tower barrel can support the concrete tower barrel 20 more conveniently.

In some embodiments, as shown in fig. 1 and 3, the concrete tower tube 20 includes a lower tube section 8, an upper tube section 7, and a transfer ring beam 9. The lower barrel section is connected to the anchor member 3. The outer diameter of the upper cylinder section 7 is smaller than that of the lower cylinder section 8, and the length of the upper cylinder section 7 is matched with that of the fan blade. The transfer ring beam 9 connects the upper end of the lower cylinder section 8 and the lower end of the upper cylinder section 7.

The outer diameter of the upper cylinder section 7 is limited in a set size, so that the tail section of the overlong blade is prevented from being impacted by wind force to deform and interfere with the upper cylinder section 7, and the use performance of the fan is ensured. The outer diameter of the lower cylinder section 8 is larger than that of the upper cylinder section 7, namely, the lower cylinder section 8 can be arranged thicker, so that the overall structural performance of the wind power tower cylinder is further ensured.

In some embodiments, the outer diameter D of the transfer ring beam 9 is related to the outer diameter D of the upper barrel section 7 by: d is less than D +2m. Thereby avoiding that the difference between the outer diameters of the upper cylinder section 7 and the lower cylinder section 8 is too large to affect the structural performance of the upper cylinder section 7.

The construction process of the foundation 10 of the wind power tower barrel according to the embodiment of the invention comprises the following steps:

and excavating a foundation pit on the construction ground, and placing the anchoring part 3 in the foundation pit. Specifically, taking the anchor member 3 as the anchor rod 31, the top flange 33 and the bottom flange 32 as an example, the top flange 33 and the bottom flange 32 are integrally placed in the foundation pit after being connected with the plurality of anchor rods 31.

And installing a template in the foundation pit and pouring plain concrete to form the body 1. Wherein the anchoring elements 3 are located in the annular cavity formed by the template for forming the body 1.

And after the plain concrete reaches the designed strength, pouring rubble concrete on the periphery of the body 1.

The inner cavity of the body 1 is backfilled with soil.

The construction process of the foundation 10 of the wind power tower cylinder according to the embodiment of the invention has the same technical advantages as the foundation 10 of the wind power tower cylinder in the embodiment, and also has the advantages of small volume, low construction difficulty and low manufacturing cost.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although the above embodiments have been shown and described, it should be understood that they are exemplary and should not be construed as limiting the present invention, and that many changes, modifications, substitutions and alterations to the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (13)

1. A wind tower foundation, comprising:

the body is formed by casting plain concrete; and

the anchoring piece is at least partially embedded in the body, the distance between the lower end face of the anchoring piece and the bottom face of the body is not larger than 50% of the total height of the body, and the rest part of the anchoring piece protrudes out of the upper end face of the body and is used for being connected with the concrete tower barrel.

2. The foundation of a wind tower as claimed in claim 1, wherein the body is cast from C40 concrete.

3. The wind tower foundation of claim 1, wherein the body is a tubular structure, and an inner cavity of the body is filled with a backfill soil layer.

4. The wind tower foundation of claim 3, further comprising a first rubble concrete layer and a second rubble concrete layer, wherein the first rubble concrete layer and the second rubble concrete layer are both cast in the inner cavity of the body, and the backfill layer is located between the first rubble concrete layer and the second rubble concrete layer.

5. The wind tower foundation of claim 1, wherein said anchor comprises:

the anchor rods are distributed at intervals along the circumferential direction of the body;

the top flange is connected with the upper ends of the anchor rods; and

the bottom flange is connected with the lower ends of the anchor rods and is embedded in the body.

6. The wind tower foundation of claim 1, wherein said anchor comprises a plurality of anchor cables spaced circumferentially along said body.

7. The wind tower foundation of claim 1, wherein said body is hollow cylindrical and said inner cavity of said body is cylindrical.

8. The foundation of the wind-power tower cylinder of claim 7, further comprising a reinforcing layer formed on the outer periphery of the body, wherein the reinforcing layer is formed by pouring rubble concrete, the outer contour of the reinforcing layer is frustum-shaped, and the diameter of the outer periphery of the reinforcing layer increases from bottom to top.

9. A wind tower, comprising:

a foundation, the foundation being a foundation of a wind tower as claimed in any one of claims 1-8; and

the concrete tower drum is connected with the anchoring part of the foundation, and the drum wall of the concrete tower drum is vertical to the ground.

10. The wind tower of claim 9, wherein the concrete tower drum is an externally prestressed concrete tower drum.

11. The wind tower of claim 9, wherein the concrete tower comprises:

a lower barrel section connected to the anchor;

the outer diameter of the upper cylinder section is smaller than that of the lower cylinder section, and the length of the upper cylinder section is matched with that of the fan blade; and

and the conversion ring beam is connected with the upper end of the lower cylinder section and the lower end of the upper cylinder section.

12. The wind tower of claim 11, wherein the relationship between the outer diameter D of the transfer ring beam and the outer diameter D of the upper tube section is: d is less than D +2m.

13. A foundation construction process of a wind power tower barrel is characterized by comprising the following steps:

excavating a foundation pit on the construction ground, and placing an anchoring part in the foundation pit;

installing a template in the foundation pit and pouring plain concrete to form a body;

pouring rubble concrete on the periphery of the body;

the inner cavity of the body is backfilled with soil.

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