CN111411642A - Ribbed plate type fan foundation - Google Patents

Abstract

The invention discloses a rib plate type fan foundation, which comprises: a foundation ring; a prefabricated module surrounding the foundation ring and fixedly connected with the foundation ring; wherein the precast modules include a plurality of male precast modules and a plurality of female precast modules alternately arranged in a circumferential direction of the foundation ring. The invention reduces the wet operation proportion, shortens the construction period of the wind turbine foundation during the installation of the wind turbine generator, and can save energy and protect environment.

Description

Ribbed plate type fan foundation

Technical Field

The invention relates to the technical field of wind driven generators, in particular to a rib plate type fan foundation.

Background

At present, most of the wind generating set on land still adopts the traditional independent foundation form in the installation process. The construction sequence of the foundation includes foundation pit excavation, foundation pit cleaning and leveling, bedding concrete pouring, foundation paying-off, reinforcement binding, cleaning, formwork erecting, concrete pouring, concrete curing and formwork dismantling. Wherein, the work of foundation paying-off, concrete pouring, reinforcing steel bar binding, formwork support, concrete maintenance, formwork removal and the like are required to be completed on site. Meanwhile, no matter the foundation ring or the prestressed anchor bolt is adopted for force transmission, the measures of on-site binding, leveling, temporary fixing and the like are required, and the foundation ring or the prestressed anchor bolt and the foundation steel bar are integrally poured after the foundation ring or the prestressed anchor bolt and the foundation steel bar are pricked.

The construction period of the foundation occupies a large proportion in the installation process of the whole onshore wind turbine (wind driven generator), and the site quality control of the wind turbine foundation needs to occupy large labor and time costs. Along with the severe requirements of the market on the installation period of the fan, the problems that the construction period of the fan foundation is long and the field construction quality is not easy to control are increasingly prominent, and the problems are urgently needed to be solved.

Meanwhile, the environmental protection requirements of wind fields in various regions are becoming stricter. The traditional construction process is difficult to meet the local environmental protection requirement. At present, the land independent type fan foundation mainly has the following problems:

1) the construction period is long:

the steel bar binding, the formwork supporting, the on-site concrete curing and the like all need to be completed on site, and a large amount of time is needed. And can not be prefabricated in factories. With the strict requirement of annual contraction of the construction period of the wind farm, the traditional construction process is difficult to meet the market requirement.

2) The construction quality is not easy to control:

the field lofting precision and the template supporting precision are difficult to guarantee. The phenomena of steel bar dislocation, cavities, exposed bars and the like can occur in the field pouring. A large quality risk is created.

As the wind field is in a remote mountain area, the transportation distance is long, the transportation condition is severe, and the concrete can not adopt commercial concrete. In-situ stirring is generally employed. Therefore, the quality of the mixed concrete is influenced by various factors, and the quality of the mixed concrete is difficult to ensure.

The maintenance of the foundation concrete is field maintenance, is influenced by local environment, and the maintenance quality is difficult to ensure. Especially in winter, the foundation maintenance difficulty is huge, even the maintenance cannot be carried out.

3) Energy conservation and environmental protection:

a large amount of construction waste can be generated on the site of the traditional process, and the local environmental protection requirement cannot be met.

Disclosure of Invention

The invention aims to provide a ribbed plate type fan foundation which is used for achieving the purposes of reducing the wet operation proportion, shortening the construction period of the fan foundation during the installation of a wind driven generator, saving energy and protecting environment.

In order to achieve the above purpose, the invention is realized by the following technical scheme:

a rib plate fan foundation comprising: a foundation ring; a prefabricated module surrounding the foundation ring and fixedly connected with the foundation ring; wherein the precast modules include a plurality of male precast modules and a plurality of female precast modules alternately arranged in a circumferential direction of the foundation ring.

Preferably, the male and female portions of adjacent male and female preform modules cooperate such that the preform modules are combined into a unitary preform module.

Preferably, one of the plurality of male preform modules or one of the plurality of female preform modules is a tension end module.

Preferably, each of the male preform modules has a first vertical projection having a first end face, a second end face, a first side face and a second side face; the first end face and the second end face are oppositely arranged, and the first side face and the second side face are oppositely arranged;

the first side surface and the second side surface are provided with two upper protruding ends protruding outwards close to the top end of the first vertical protruding part; the protruding directions of the two upper protruding ends are opposite;

the first side face and the second side face are provided with two lower sunken ends sunken inwards corresponding to the upper convex ends and close to the bottom ends of the first vertical convex parts; the sinking directions of the two lower sinking ends are opposite;

the upper part and/or the lower part of each convex prefabricated module is/are provided with a first annular lock hole which penetrates through the first side surface and the second side surface;

each of the concave precast modules has a second vertical protrusion having a third end face, a fourth end face, a third side face, and a fourth side face; the third end surface and the fourth end surface are oppositely arranged, and the third side surface and the fourth side surface are oppositely arranged;

two upper concave ends provided with inward depressions are formed on the third side and the fourth side near the top end of the second vertical protrusion; the sinking directions of the two upper sinking ends are opposite;

two lower protruding ends protruding outwards are formed on the third side face and the fourth side face, corresponding to the upper recessed ends and close to the bottom end of the second vertical protruding part; the protruding directions of the two lower protruding ends are opposite;

the upper part and/or the lower part of each concave prefabricated module is/are provided with a second annular lock hole which penetrates through the third side surface and the fourth side surface and is communicated with the first annular lock hole;

the tensioning end module is further provided with a first inclined plane and a second inclined plane, the first inclined plane and the second inclined plane are formed with reserved lock holes communicated with the first annular lock hole and the second annular lock hole, and a first annular tensioning cable is arranged in the reserved lock holes, the second annular lock hole and the first annular lock hole in a penetrating mode.

Preferably, each male prefabricated module is provided with a first bearing part and a first rib plate, and the first vertical protrusion part is connected with the first bearing part and is perpendicular to the first bearing part;

the first rib plate is vertically arranged on the top surface of the first bearing part and is fixedly connected with the first end surface of the first vertical protruding part;

a third annular lock hole is formed in the side face of the first bearing part; a grouting hole communicated with the third annular lock hole is formed in the top surface of the first bearing part;

each concave prefabricated module is provided with a second bearing part and a second rib plate, and the second vertical protruding part is connected with the second bearing part and is perpendicular to the second bearing part;

the second rib plate is vertically arranged on the top surface of the second bearing part and is fixedly connected with the third end face of the second vertical protruding part;

a fourth annular lock hole is formed in the side face of the second bearing part; a grouting hole communicated with the fourth annular lock hole is formed in the top surface of the second bearing part;

and a second annular tension cable penetrates through the third annular lock hole and the fourth annular lock hole which are adjacent to each other.

Preferably, the method further comprises the following steps: the first embedded shear steel plates and the second embedded shear steel plates are fixedly connected with the second end surfaces of the first vertical protruding parts of the convex prefabricated modules, and one end of each pair of the first embedded shear steel plates corresponds to one end of each pair of the first embedded shear steel plates;

the other end of each pair of the first embedded shear steel plates is fixedly connected with the foundation ring;

one end of each pair of second embedded shear steel plates is correspondingly and fixedly connected with the fourth end face of the second vertical protruding part of the concave prefabricated module;

and the other end of each pair of second embedded shear steel plates is fixedly connected with the foundation ring.

Preferably, the foundation ring comprises:

prefabricating a steel cylinder, a T-shaped flange and a plurality of connecting webs;

the T-shaped flange is arranged at the top end of the prefabricated steel cylinder; the connecting webs are arranged along the circumferential direction of the prefabricated steel cylinder at intervals;

the first pre-buried shear steel plate and the second pre-buried shear steel plate are connected with the connecting web plate in a one-to-one correspondence mode through connecting pieces.

Preferably, the connecting piece is a connecting plate group, each connecting plate group comprises two connecting plates and a plurality of high-strength bolts, each connecting plate is provided with a round hole with a preset aperture, the first pre-buried shear steel plate and the connecting web or the second pre-buried shear steel plate and the connecting web are located between the two connecting plates, the high-strength bolts penetrate through the round holes and rotate to enable the first pre-buried shear steel plate and the connecting web or the second pre-buried shear steel plate and the connecting web to be clamped and fixed.

Preferably, the male precast modules are provided with first carrying portions, and the first carrying portions extend from the second end faces of the first vertical protrusions towards the direction of the foundation ring and are used for supporting the precast steel cylinders;

the concave prefabricated module is provided with a second carrying part, and the second carrying part extends towards the direction of the foundation ring from the fourth end surface of the second vertical protruding part and is used for supporting the prefabricated steel cylinder.

Preferably, the first circumferential locking hole is formed on an upper convex end and/or a lower concave end of the convex prefabricated module;

the second circumferential locking hole is formed on the lower protruding end and/or the upper recessed end of the female preform module.

Preferably, the method further comprises the following steps: and concrete is formed in the prefabricated steel cylinder, the space surrounded by the periphery of the prefabricated steel cylinder and all the convex prefabricated modules and all the concave prefabricated modules, and all the grouting holes.

Preferably, the system also comprises a first reinforcement through hole group, a second reinforcement through hole group, a first connecting reinforcement group and a second connecting reinforcement group;

a plurality of first reinforcement penetrating holes in the first reinforcement penetrating hole group are close to the T-shaped flange and are arranged at intervals along the circumferential direction of the prefabricated steel cylinder;

a plurality of second reinforcement penetrating holes in the second reinforcement penetrating hole group are far away from the T-shaped flange and are arranged at intervals along the circumferential direction of the prefabricated steel cylinder;

the first reinforcement penetrating holes and the second reinforcement penetrating holes are arranged in a one-to-one correspondence mode along the bus direction of the prefabricated steel cylinder;

two first embedded steel bar threaded sleeves are arranged between each pair of the first embedded shear steel plates;

two second embedded steel bar threaded sleeves are arranged between each pair of the second embedded shear steel plates;

one end of each connecting steel bar in the first connecting steel bar group is correspondingly connected with one of the two first embedded steel bar threaded sleeves or one of the second embedded steel bar threaded sleeves, and the other end of each connecting steel bar group penetrates through the first steel bar penetrating hole and is positioned inside the prefabricated steel cylinder;

one end of each connecting steel bar in the second connecting steel bar group is correspondingly connected with the other one of the two first embedded steel bar threaded sleeves or the other one of the two second embedded steel bar threaded sleeves, and the other end of each connecting steel bar penetrates through the second bar penetrating hole and is located inside the prefabricated steel cylinder.

Compared with the prior art, the invention has the following advantages:

the invention provides a rib plate type fan foundation, which comprises: a foundation ring; a prefabricated module surrounding the foundation ring and fixedly connected with the foundation ring; wherein the precast modules include a plurality of male precast modules and a plurality of female precast modules alternately arranged in a circumferential direction of the foundation ring.

Therefore, only partial natural maintenance is needed in the construction process of the fan foundation, the rib plate type fan foundation can be directly hoisted and mounted on the foundation ring after being assembled, and the natural maintenance part does not participate in stress in the construction period, so that the construction period of the rib plate type fan foundation is greatly shortened. According to the rib plate type fan foundation, the plurality of convex prefabricated modules and the plurality of concave prefabricated modules are assembled to build the rib plate type fan foundation, so that building waste cannot be generated in a fan foundation construction site, and the requirement of environmental protection is met. The rib plate type fan foundation is a detachable foundation, and after the operation period of a wind field is finished, the prestressed cables (the first to the fourth radial tension cables) can be detached, so that the rib plate type fan foundation is detached, the wind field is free of pollution, and the environment-friendly benefit is good. The invention further achieves the purposes of reducing the wet operation proportion, shortening the construction period of the wind turbine foundation during the installation of the wind turbine generator, saving energy and protecting environment.

Drawings

Fig. 1 is a schematic structural diagram of a foundation ring of a rib plate type fan foundation according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a convex prefabricated module of a rib plate type wind turbine foundation according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a concave prefabricated module of a rib plate type fan foundation according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a tension end module of a rib plate type fan foundation according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a connection relationship between the convex prefabricated module pre-foundation rings of the rib plate type wind turbine foundation according to an embodiment of the present invention;

fig. 6 is a schematic structural view illustrating a connection steel bar arranged in a foundation ring of a rib plate type fan foundation according to an embodiment of the present invention;

fig. 7 is a cross-sectional view of a first hoop tension cable of a rib plate type fan foundation according to an embodiment of the present invention;

FIG. 8 is a schematic view of a first process of assembling a rib-plate type fan base according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a second process of assembling a rib-plate type fan base according to an embodiment of the present invention;

fig. 10 is a schematic overall structural diagram of a rib-plate type fan foundation provided in an embodiment of the present invention, when no connecting steel bar is added in an assembly process;

fig. 11 is a schematic view of an overall structure of a rib plate type fan foundation provided in an embodiment of the present invention when connecting reinforcing bars are added in an assembling process;

fig. 12 is a schematic view of an overall structure of a rib-plate type fan base according to an embodiment of the present invention.

Description of reference numerals:

100-a base ring; 110-connecting webs; 111-prefabricating a steel cylinder; a 112-T flange; 113-a first tendon passing hole; 114-a second lacing hole; 200-male precast modules; 210-a first backplane; 211-a first rib; 212-a first pre-buried shear steel plate; 213-a first embedded steel bar threaded sleeve; 2140-first sub-annular locking hole; 2141-a second sub-circumferential locking hole; 2142-third sub-circumferential locking hole; 2143-fourth sub-circumferential locking hole; 215-a first grouted hole set; 2111-upper projection; 2112-lower recessed end; 2101-a first mounting section; 300-concave prefabricated module; 310-a second backplane; 311-second rib; 312-second pre-buried shear steel plates; 313-a second embedded steel bar threaded sleeve; 3140-fifth sub-circumferential keyhole; 3141-sixth sub-circumferential locking hole; 3142-seventh sub-circumferential keyhole; 3143-eighth sub-circumferential locking hole; 315-a second grouted hole set; 3111-upper concave end; 3112-lower projection; 3101-a second mounting part; 301-a tension end module; 316-first reserved cable hole; 3160-a first pre-buried anchor plate; 317-a second reserved cable hole; 3170-a second reserved anchor plate; 400-first sub-hoop tension cable; 410-a second sub-hoop tensioning cable; 500-third sub-ring direction stretching cable; 510-a fourth sub-hoop tensioning cable; 600-a set of connection plates; 700-connecting reinforcing steel bars; 800-concrete.

Detailed Description

The rib plate type fan foundation provided by the invention is further described in detail with reference to the accompanying drawings 1-12 and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

In the description of the present invention, it is to be understood that the terms "center," "height," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in 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 not to be considered limiting. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

With reference to fig. 1 to 12, the rib plate type fan foundation of the present embodiment includes: a foundation ring 100; prefabricated modules surrounding the foundation ring 100 and fixedly connected with the foundation ring 100; wherein the preform modules comprise a number of male preform modules 200 and a number of female preform modules 300 arranged alternately in the circumferential direction of the foundation ring 100. The male and female portions of adjacent male and female preform modules 200 and 300 cooperate to join the preform modules into a unitary preform module.

Specifically, with continued reference to fig. 1, the foundation ring 100 includes a prefabricated steel cylinder 111, a T-shaped flange 112, a plurality of connecting webs 110, a first perforation set (not numbered), and a second perforation set (not numbered).

The T-shaped flange 112 is arranged at the top end of the prefabricated steel cylinder 111; the connecting webs 110 are arranged at intervals along the circumferential direction of the prefabricated steel cylinder 111; a plurality of first reinforcement through holes 113 in the first reinforcement through hole group are close to the T-shaped flange 112 and are arranged at intervals along the circumferential direction of the prefabricated steel cylinder 111.

A plurality of second reinforcement through holes 114 in the second reinforcement through hole group are far away from the T-shaped flange 112 and are arranged at intervals along the circumferential direction of the prefabricated steel cylinder 111.

The first rib penetrating holes 113 and the second rib penetrating holes 114 are arranged in a one-to-one correspondence manner along a generatrix direction of the prefabricated steel cylinder 111, and specifically, may be located between two adjacent connecting webs 110. It is understood that the T-shaped flange 112 (prefabricated T-shaped flange) and the prefabricated steel cylinder 111 can be prefabricated by using the existing manufacturing method, and the details are not repeated herein. All the connecting webs 110 and the prefabricated steel cylinder 111 can be fixedly connected by adopting a factory penetration welding mode. The fan tower is connected to a rib plate type fan base formed later by the T-shaped flange 112, that is, the T-shaped flange 112 is used for being fixedly connected to the fan tower.

With continued reference to fig. 2, each of the male preform modules 200 includes: a first base plate 210 and a first rib 211, the first base plate 210 being divided into a first carrying portion 2101 and a first carrying portion and a first vertical protrusion.

The first vertical protrusion has a first end face, a second end face, a first side face and a second side face; the first end face and the second end face are oppositely arranged, and the first side face and the second side face are oppositely arranged;

near the top end of the first vertical protrusion, the first side face and the second side face are formed with two upper protrusion ends 2111 protruding outward; the protruding directions of the two upper protruding ends 2111 are opposite;

the first side face and the second side face are formed with two lower recessed ends 2112 recessed inward, corresponding to the upper protruding ends 2111, near the bottom ends of the first vertical protruding portions; the concave directions of the two lower concave ends 2112 are opposite;

each male preform module 200 is provided with a first circumferential locking hole at the upper part and/or the lower part thereof, which penetrates the first side surface and the second side surface. The first circumferential locking hole is formed on the upper convex end 2111 and/or the lower concave end 2112 of the male preform module.

Specifically, in this embodiment, the first annular locking hole includes a first sub-annular locking hole 2140 penetrating through the two upper protruding ends 2111 and a second sub-annular locking hole 2141 penetrating through the two lower protruding ends 2112.

The first vertical protruding part is connected with the first bearing part and is perpendicular to the first bearing part;

the first rib plate 211 is vertically arranged on the top surface of the first bearing part and is fixedly connected with the first end surface of the first vertical protrusion part;

a third annular lock hole is formed in the side face of the first bearing part; and a grouting hole communicated with the third annular lock hole is formed in the top surface of the first bearing part. Specifically, a first grouting hole group 215 is arranged on the top surface of the first bearing part; the first grout hole group 215 includes at least four first grout holes; two of the first grouting holes are located on one side of the first rib plate 211, and the other two of the first grouting holes are located on the other side of the first rib plate 211.

One of the two first grouting holes located on the same side of the first rib plate 211 is close to the edge of the first bearing part, and the other first grouting hole is far away from the edge of the first bearing part and is close to the first vertical protruding part.

In this embodiment, the third annular locking hole includes a third sub-annular locking hole 2142 and a fourth sub-annular locking hole 2143; the third sub-annular locking hole 2142 is communicated with two first grouting holes which are located at two sides of the first rib plate 211 and close to the edge of the first bearing part from the side surface of the first bearing part.

The fourth annular locking hole 2143 is communicated with two first grouting holes, which are located on two sides of the first rib plate 211 and far away from the edge of the first bearing part, from the side surface of the first bearing part.

A plurality of pairs of first pre-buried shear steel plates 212, wherein one end of each first pre-buried shear steel plate 212 in each pair is correspondingly and fixedly connected with the second end surface of the first vertical protrusion of the male precast module 200;

the other end of each pair of the first pre-buried shear steel plates 212 is fixedly connected with the foundation ring 100;

the convex prefabricated module is provided with a first carrying part 2101, and the first carrying part 2101 extends from the second end surface of the first vertical protrusion part towards the direction of the foundation ring 100 and is used for supporting the prefabricated steel cylinder 111. The top surface of the first mounting part 2101 is higher than the top surface of the first carrier part; the bottom end of the prefabricated steel cylinder 111 is located on the top surface of the first mount 2101.

The first pre-buried shear steel plates 212 are in one-to-one correspondence with the connecting web 110, and are respectively fixedly connected with the connecting web 110 through connecting pieces, and the fixed connection can be detachable connection.

Two first pre-embedded steel bar threaded sleeves 213 are arranged between the two first pre-embedded shear steel plates 212.

Wherein, the first bottom plate 210, the first rib plate 211; all the first sub-annular locking holes 2140, all the second sub-annular locking holes 2141, all the third sub-annular locking holes 2142, all the fourth sub-annular locking holes 2143, the first grouting hole group 215, the upper protruding end 2111 and the lower recessed end 2112 are prepared by a factory concrete integral casting method. The first embedded shear steel plate 212 is an embedded steel plate, and is embedded into concrete in the reinforcement binding process of the convex prefabricated module 200, and is integrally cast and molded with the convex prefabricated module 200. Wherein upper male end 2111 and lower female end 2112 are shear connection structures of male preform module 200 with other modules, such as female preform module 300. The pre-buried shear steel plates (first pre-buried shear steel plates 212) are used to transfer the bending moment and the shearing force of the foundation ring 100.

With continued reference to fig. 3, each of the female prefabricated molds 300 includes: a second bottom plate 310 and a second rib 311, the second bottom plate 310 being divided into a second carrying portion 3101 and a second carrying portion, and a second vertical protrusion.

The second vertical protrusion has a third end surface, a fourth end surface, a third side surface and a fourth side surface; the third end surface and the fourth end surface are oppositely arranged, and the third side surface and the fourth side surface are oppositely arranged;

near the top end of the second vertical protrusion, the third side and the fourth side are formed with two upper concave ends 3111 provided with inward depressions; the concave directions of the two upper concave ends 3111 are opposite;

the third and fourth sides are formed with two lower protrusion ends 3112 protruding outward, corresponding to the upper concave end 3111, near the bottom end of the second vertical protrusion; the protruding directions of the two lower protruding ends 3112 are opposite.

A second annular locking hole which penetrates through the third side surface and the fourth side surface and is communicated with the first annular locking hole is formed in the upper part and/or the lower part of each concave prefabricated module 300; the second circumferential locking hole is formed on the lower protruding end and/or the upper recessed end of the female preform module.

The second vertical protruding part is connected with the second bearing part and is perpendicular to the second bearing part;

the second rib plate 311 is vertically arranged on the top surface of the second bearing part and is fixedly connected with the third end surface of the second vertical protrusion part;

a fourth annular lock hole is formed in the side face of the second bearing part; and a grouting hole communicated with the fourth annular lock hole is formed in the top surface of the second bearing part.

In this embodiment, the second annular locking holes include a fifth sub-annular locking hole 3140 penetrating the two upper concave ends 3111 and a sixth sub-annular locking hole 3141 penetrating the two lower convex ends 3112.

A second grouting hole group 315 is arranged on the top surface of the second bearing part; the second grouting hole group 315 includes at least four second grouting holes; two of the second grouting holes are located on one side of the second rib plate 311, and the other two second grouting holes are located on the other side of the second rib plate 311.

One of the two second grouting holes located on the same side of the second rib plate 311 is close to the edge of the second bearing part, and the other second grouting hole is far away from the edge of the second bearing part and is close to the second vertical protrusion.

In this embodiment, the fourth annular locking hole includes a seventh sub annular locking hole 3142 and an eighth sub annular locking hole 3143.

The seventh sub-circumferential locking hole 3142 is communicated with two second grouting holes, which are located at two sides of the second rib plate 311 and close to the edge of the second bearing part, from the side surface of the first bearing part.

The eighth sub-circumferential locking hole 3143 is communicated with two second grouting holes, which are located on two sides of the second rib plate 311 and far away from the edge of the second bearing part, from the side surface of the second bearing part.

And a second annular tension cable penetrates through the third annular lock hole and the fourth annular lock hole which are adjacent to each other.

A plurality of pairs of second pre-buried shear steel plates 312, wherein one end of each second pre-buried shear steel plate 312 in each pair is correspondingly and fixedly connected with a fourth end surface of the second vertical protrusion of the concave prefabricated module 300;

the other end of each pair of the second embedded shear steel plates 312 is fixedly connected with the foundation ring 100.

The female prefabricated module 300 is provided with a second mounting portion 3101, and the second mounting portion 3101 extends from the fourth end surface of the second vertical protrusion towards the foundation ring 100 for supporting the prefabricated steel cylinder 111. The top surface of the second mounting portion 3101 is higher than the top surface of the second carrier portion; the bottom end of the prefabricated steel cylinder 111 is located on the top surface of the second mounting portion 3101.

The second pre-buried shear steel plates 312 correspond to the connection web 110 one by one, and are respectively fixedly connected with the connection web 110 through connecting pieces.

Two second embedded steel bar threaded sleeves 313 are arranged between the two second embedded shear steel plates 312.

Wherein, the second bottom plate 310, the second rib 311; all the fifth sub-annular locking holes 3140, all the sixth sub-annular locking holes 3141, all the seventh sub-annular locking holes 3142, all the eighth sub-annular locking holes 3143, the second grouting hole group 315, the upper concave end 3111 and the lower convex end 3112 are prepared by a concrete integral casting method in a factory. The second pre-buried shear steel plate 312 is a pre-buried steel plate, pre-buried in concrete in the reinforcement binding process of the concave prefabricated module 300, and integrally cast with the concave prefabricated module 300. Wherein the upper concave end 3111 and the lower convex end 3112 are shear connection structures of the female preform module 300 and other modules (e.g., the male preform module 200). The pre-buried shear steel plate (second pre-buried shear steel plate 312) is used to transfer the bending moment and the shearing force of the foundation ring 100.

Preferably, with continued reference to fig. 4, in this embodiment, any one of the plurality of female prefabricating modules 300 can be used as the tensioning end module 301.

The tensioning end module 301 is further provided with a first inclined plane and a second inclined plane, the first inclined plane is connected with the third side face and the second rib plate 311, the second inclined plane is connected with the fourth side face and the second rib plate 311, a reserved lock hole is formed in the first inclined plane and communicated with the first annular lock hole and the second annular lock hole, and a first annular tensioning cable is arranged in the reserved lock hole, the second annular lock hole and the first annular lock hole in a penetrating mode.

The reserved cable holes comprise a first reserved cable hole 316 and a second reserved cable hole 317; the first preformed cable hole 316 penetrates through the first inclined surface and the second inclined surface, is located near the top of the tensioning end module 302, and communicates with the fifth sub-circumferential locking hole 3140 of the tensioning end module 301.

The second reserved cable hole 317 penetrates through the first inclined surface and the second inclined surface, is located near the bottom of the tensioning end module 301, and is communicated with the sixth annular locking hole 3141 of the tensioning end module 301.

A first embedded anchor plate 3160 is further arranged at the position of the first reserved cable hole 316; a second pre-buried anchor plate 3170 is further arranged at the position of the second reserved cable hole 317, and the first pre-buried anchor plate 3160 is an anchor backing plate of the first sub-hoop tensioning cable 400; the second embedded anchor plate 3170 is an anchor backing plate of the second sub-circumferential tension cable 410.

It will be appreciated that any one of the male preform modules 200 of the plurality of male preform modules 200 acts as a tension end module.

The two upper protrusions 2111 of each male preform module 200 are respectively located in the upper recesses 3111 of the two female preform modules 300 adjacent thereto, and abut against each other; the two lower recesses 2112 of each male preform module 200 include the lower protrusions 3112 of the two female preform modules 300 adjacent thereto, respectively, and abut against each other.

Therefore, all the convex prefabricated modules 200, all the concave prefabricated modules 300 and the tensioning end module 301 are mutually tightly propped to form a whole, and the whole rib plate type fan foundation is stressed integrally.

Preferably, referring to fig. 5, the connecting members are connecting plate groups (not numbered in the figure), each connecting plate group includes two connecting plates 600 and a plurality of high-strength bolts (not numbered in the figure), each connecting plate 600 is provided with a circular hole (not numbered in the figure) with a preset aperture, the first pre-buried shear steel plate 212 and the connecting web 110 or the second pre-buried shear steel plate 312 and the connecting web 110 are located between the two connecting plates 600, the high-strength bolts penetrate through the circular holes, and the high-strength bolts are rotated to clamp and fix the first pre-buried shear steel plate 212 and the connecting web 110 or the second pre-buried shear steel plate 312 and the connecting web 110, so as to form a high-strength bolt connecting node, and transmit the load of the foundation ring 100 to all the prefabricated male prefabricated modules 200, prefabricated modules and prefabricated modules 110, All the female preform modules 300 and the tension end modules 301. The connecting plate 600 transmits all shearing forces and all bending moments in the construction process (wind turbine tower barrel hoisting and wind turbine hoisting), and transmits all shearing forces and partial bending moments in the normal use process. The circular hole having a predetermined diameter, for example, an open circular hole, may be used to adjust the levelness and/or verticality of the foundation ring 100.

Preferably, with continuing reference to fig. 6, the present embodiment further includes: a first connecting steel bar group (not numbered in the figure) and a second connecting steel bar group (not shown in the figure), wherein one end of each connecting steel bar 700 in the first connecting steel bar group is correspondingly connected with one of the two first embedded steel bar threaded sleeves 213 or one of the second embedded steel bar threaded sleeves 313, and the other end of each connecting steel bar 700 penetrates through the first bar penetrating hole 113 and is located inside the prefabricated steel cylinder 111.

One end of each connecting steel bar in the second connecting steel bar group is correspondingly connected with the other one of the two first embedded steel bar threaded sleeves 213 or the other one of the two second embedded steel bar threaded sleeves 313, and the other end of each connecting steel bar group penetrates through the second bar penetrating hole 114 and is located inside the prefabricated steel cylinder 111.

Thus, the connection bars 700 transmit the load transmitted from the foundation ring 100 to all the male precast modules 200, all the female precast modules 300, and the tension end modules 301 which are precast. The connection reinforcing bars 700 transmit a part of bending moment in a normal use process, do not transmit shearing force, and do not bear load in a construction process. Preferably, with continuing reference to fig. 7-10, the present embodiment further includes: the first annular tensioning cable comprises a first sub annular tensioning cable 400 and a second sub annular tensioning cable 410; the second annularly-stretching cable comprises a third sub-annularly-stretching cable 500 and a fourth sub-annularly-stretching cable 510.

The first sub-ring directional bracing cable 400 enters from the second inclined plane of the tensioning end module, passes through the first reserved cable hole 316 and the first ring-shaped locking hole 3140 of the tensioning end module, penetrates through the first sub-ring directional locking holes 2140 of all the convex prefabricated modules 200 and the fifth sub-ring directional locking holes 3140 of all the concave prefabricated modules 300, enters from the second side plane of the tensioning end module, passes through the first sub-ring directional locking hole 3140 and the first reserved cable hole 316, and passes through the first inclined plane of the tensioning end module; the hoop prestress applied to the tensioning cable 400 by the first sub-ring enables all the convex prefabricated modules 200, all the concave prefabricated modules 300 and the tensioning end module 301 to be mutually abutted to form a whole, so that the whole rib plate type fan foundation is stressed integrally.

Similarly, the second sub-hoop tensioning cable 410 enters from the second inclined surface of the tensioning end module, passes through the second reserved cable hole 317 and the second circumferential locking hole 3141 of the tensioning end module, passes through the second circumferential locking holes 2141 of all the male prefabricated modules 200 and the sixth sub-hoop locking holes 3141 of all the female prefabricated modules 300, enters from the second side surface of the tensioning end module, passes through the second sub-hoop locking holes 3140 and the second reserved cable hole 317, and passes through the first inclined surface of the tensioning end module.

The hoop prestress applied to the tensioning cable 410 by the second sub-ring enables all the convex prefabricated modules 200, all the concave prefabricated modules 300 and the tensioning end module 301 to be mutually propped up to form a whole, so that the whole rib plate type fan foundation is stressed integrally.

The third sub-ring-direction tension cable 500 penetrates through all the third sub-ring-direction locking holes 2142 and all the seventh sub-ring-direction locking holes 3142. The third sub-ring is to the hoop prestressing force that the bracing cable 500 applied make all protruding type prefabricated modules 200, all concave type prefabricated modules 300 and stretch-draw end module 301 push up each other tightly, become a whole for whole rib plate formula fan basis is whole atress.

The fourth sub-ring-direction bracing cable 510 penetrates through all the fourth sub-ring-direction locking holes 2143 and all the eighth sub-ring-direction locking holes 3143; the hoop prestress applied to the tensioning cable 510 by the fourth sub-ring enables all the convex prefabricated modules 200, all the concave prefabricated modules 300 and the tensioning end module 301 to be mutually abutted to form a whole, so that the whole rib plate type fan foundation is stressed integrally.

As can be seen from the above, by tightening the first sub circumferential direction tension cable 400, the second sub circumferential direction tension cable 410, the third sub circumferential direction tension cable 500, and the fourth sub circumferential direction tension cable 510, the bending moment and the shearing force transmitted from the connection plate 600 and the connection bar 700 can be correspondingly transmitted to the first bottom plate 210, the first rib plate 211, the second bottom plate 310, and the second rib plate 311.

Preferably, with continuing reference to fig. 12, the present embodiment further includes: grouting is performed on the space surrounded by the interior of the prefabricated steel cylinder 111, the peripheral side of the prefabricated steel cylinder 111, all the male prefabricated modules 200 and all the female prefabricated modules 300, and all the first grouting hole groups 215 and all the second grouting hole groups 315 to form the concrete 800.

Therefore, the rib plate type fan foundation provided by the embodiment only needs partial natural maintenance in the process of fan foundation construction, the rib plate type fan foundation can be directly assembled and then installed on the foundation ring in a lifting mode, the natural maintenance part does not participate in stress in the construction period, and the rib plate type fan foundation construction period is greatly shortened. This embodiment adopts a plurality of protruding type prefabricated module with a plurality of concave type prefabricated module is assembled and is built rib plate type fan basis, can know from this that this embodiment can not produce building rubbish in fan basis construction place, satisfies the environmental protection requirement. The rib plate type fan foundation is a detachable foundation, after the operation period of a wind field is finished, the prestressed cables (the first to the fourth radial tension cables) can be detached, and the rib plate type fan foundation is detached, so that the rib plate type fan foundation is free of pollution to the wind field and good in environmental protection benefit. The invention further achieves the purposes of reducing the wet operation proportion, shortening the construction period of the wind turbine foundation during the installation of the wind turbine generator, saving energy and protecting environment.

In the present embodiment, the main assembly process of the rib plate type fan base is as follows, please refer to fig. 8 to 12,

at present, 7 concave prefabricated modules 300 and a concave tensioning end module 301 are uniformly distributed according to 360 degrees in the circumferential direction and radially lofted according to a drawing, and are hoisted to an excavated foundation, and the hoisting process is correspondingly and symmetrically constructed. After the pre-stressed pore channels are cleaned, the pre-stressed pore channels are positioned and leveled, 8 convex prefabricated modules 200 are hoisted respectively, the hoisted structure is shown in figure 9, and the modules are symmetrically installed in the hoisting process, so that a prefabricated foundation is formed.

Then, the foundation ring 100 is hoisted, and the circumferential angle of the foundation ring 100 is adjusted, so that the connection web 110 of the foundation ring 100 is aligned with the pre-buried shear steel plates (including the first pre-buried shear steel plate 212 and the first pre-buried shear steel plate 312) of the female precast module 300, the tensioning end module 301, and the male precast module 200. After aligning, the connecting plates 600 are installed, and two connecting plates 600 are located at each shear steel plate. And (3) mounting the high-strength bolt, wherein the mounted structure is shown in figure 10.

The first sub-ring-direction tension cable 400 is threaded into the first reserved cable hole 316, all the first sub-ring-direction locking holes 2140 and all the fifth sub-ring-direction locking holes 3140; the first sub-circumferential tensioning cable 400 is prestressed and tensioned.

The second sub circumferential tension cable 410 is threaded into the second reserved cable hole 317, all the second sub circumferential locking holes 2141 and all the sixth sub circumferential locking holes 3141. The second sub circumferential tension line 410 is prestressed and tensioned.

The third sub-ring directional bracing cable 500 penetrates through all the third sub-ring directional locking holes 2142 and all the seventh sub-ring directional locking holes 3142. And performing prestress tensioning on the third sub-circumferential tensioning cable 500.

The fourth sub-ring direction tension cable 510 is threaded into all the fourth sub-ring direction locking holes 2143 and all the eighth sub-ring direction locking holes 3143; and performing prestress tension on the fourth sub-circumferential tension cable 510.

After tensioning is finished, the foundation becomes a stressed whole, and the upper fan tower can be borne. The tensioned chassis is shown in fig. 10.

Grouting the grouting holes of the convex prefabricated module 200, the grouting holes of the concave prefabricated module 300, the grouting holes of the tensioning end module 301 and the joint bars. The structure after grouting is shown in figure 12

And (3) connecting the connecting steel bars 700 to the first embedded steel bar threaded sleeve 213 of the convex prefabricated module 200, the second embedded steel bar threaded sleeve 313 of the concave prefabricated module 300 and the embedded steel bar threaded sleeve of the tension end module 301 respectively through the bar penetrating holes of the foundation ring 100. The assembled structure is shown in fig. 11.

Concrete is poured into the inner space of the foundation ring 100, and the cavity formed by the foundation ring 100, the convex prefabricated module 200, the concave prefabricated module 300 and the tension end module 301. The cast structure is shown in fig. 12. The concrete in the cavity can be naturally cured. And (5) after the cavity is poured, foundation landfill can be carried out, and an upper structure is installed.

In summary, the present invention provides a rib plate type fan foundation, including: a foundation ring; a prefabricated module surrounding the foundation ring and fixedly connected with the foundation ring; wherein the precast modules include a plurality of male precast modules and a plurality of female precast modules alternately arranged in a circumferential direction of the foundation ring.

Therefore, only partial natural maintenance is needed in the construction process of the fan foundation, the rib plate type fan foundation can be directly hoisted and mounted on the foundation ring after being assembled, and the natural maintenance part does not participate in stress in the construction period, so that the construction period of the rib plate type fan foundation is greatly shortened. According to the rib plate type fan foundation, the plurality of convex prefabricated modules and the plurality of concave prefabricated modules are assembled to build the rib plate type fan foundation, so that building waste cannot be generated in a fan foundation construction site, and the requirement of environmental protection is met. The rib plate type fan foundation is a detachable foundation, and after the operation period of a wind field is finished, the prestressed cables (the first to the fourth radial tension cables) can be detached, so that the rib plate type fan foundation is detached, the wind field is free of pollution, and the environment-friendly benefit is good. The invention further achieves the purposes of reducing the wet operation proportion, shortening the construction period of the wind turbine foundation during the installation of the wind turbine generator, saving energy and protecting environment.

While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.

Claims (12)

1. A rib plate type fan foundation is characterized by comprising:

a foundation ring;

a prefabricated module surrounding the foundation ring and fixedly connected with the foundation ring;

wherein the precast modules include a plurality of male precast modules and a plurality of female precast modules alternately arranged in a circumferential direction of the foundation ring.

2. The rib plate type fan foundation of claim 1,

the male and female segments of adjacent male and female precast modules cooperate such that the precast modules are combined into a single precast module.

3. The rib plate type fan foundation of claim 2,

one of the plurality of male precast modules or one of the plurality of female precast modules is a tension end module.

4. The rib plate type fan foundation of claim 3,

each of the male preform modules has a first vertical projection having a first end face, a second end face, a first side face and a second side face; the first end face and the second end face are oppositely arranged, and the first side face and the second side face are oppositely arranged;

the first side surface and the second side surface are provided with two upper protruding ends protruding outwards close to the top end of the first vertical protruding part; the protruding directions of the two upper protruding ends are opposite;

the first side face and the second side face are provided with two lower sunken ends sunken inwards corresponding to the upper convex ends and close to the bottom ends of the first vertical convex parts; the sinking directions of the two lower sinking ends are opposite;

the upper part and/or the lower part of each convex prefabricated module is/are provided with a first annular lock hole which penetrates through the first side surface and the second side surface;

each of the concave precast modules has a second vertical protrusion having a third end face, a fourth end face, a third side face, and a fourth side face; the third end surface and the fourth end surface are oppositely arranged, and the third side surface and the fourth side surface are oppositely arranged;

two upper concave ends provided with inward depressions are formed on the third side and the fourth side near the top end of the second vertical protrusion; the sinking directions of the two upper sinking ends are opposite;

two lower protruding ends protruding outwards are formed on the third side face and the fourth side face, corresponding to the upper recessed ends and close to the bottom end of the second vertical protruding part; the protruding directions of the two lower protruding ends are opposite;

the upper part and/or the lower part of each concave prefabricated module is/are provided with a second annular lock hole which penetrates through the third side surface and the fourth side surface and is communicated with the first annular lock hole;

the tensioning end module is further provided with a first inclined plane and a second inclined plane, the first inclined plane and the second inclined plane are formed with reserved lock holes communicated with the first annular lock hole and the second annular lock hole, and a first annular tensioning cable is arranged in the reserved lock holes, the second annular lock hole and the first annular lock hole in a penetrating mode.

5. The rib plate type fan foundation of claim 4,

each convex prefabricated module is provided with a first bearing part and a first rib plate, and the first vertical protruding part is connected with the first bearing part and is perpendicular to the first bearing part;

the first rib plate is vertically arranged on the top surface of the first bearing part and is fixedly connected with the first end surface of the first vertical protruding part;

a third annular lock hole is formed in the side face of the first bearing part; a grouting hole communicated with the third annular lock hole is formed in the top surface of the first bearing part;

each concave prefabricated module is provided with a second bearing part and a second rib plate, and the second vertical protruding part is connected with the second bearing part and is perpendicular to the second bearing part;

the second rib plate is vertically arranged on the top surface of the second bearing part and is fixedly connected with the third end face of the second vertical protruding part;

a fourth annular lock hole is formed in the side face of the second bearing part; a grouting hole communicated with the fourth annular lock hole is formed in the top surface of the second bearing part;

and a second annular tension cable penetrates through the third annular lock hole and the fourth annular lock hole which are adjacent to each other.

6. The rib plate type fan foundation of claim 5, further comprising: the first embedded shear steel plates and the second embedded shear steel plates are fixedly connected with the second end surfaces of the first vertical protruding parts of the convex prefabricated modules, and one end of each pair of the first embedded shear steel plates corresponds to one end of each pair of the first embedded shear steel plates;

the other end of each pair of the first embedded shear steel plates is fixedly connected with the foundation ring;

one end of each pair of second embedded shear steel plates is correspondingly and fixedly connected with the fourth end face of the second vertical protruding part of the concave prefabricated module;

and the other end of each pair of second embedded shear steel plates is fixedly connected with the foundation ring.

7. The rib plate fan foundation of claim 6, wherein the foundation ring comprises:

prefabricating a steel cylinder, a T-shaped flange and a plurality of connecting webs;

the T-shaped flange is arranged at the top end of the prefabricated steel cylinder; the connecting webs are arranged along the circumferential direction of the prefabricated steel cylinder at intervals;

the first pre-buried shear steel plate and the second pre-buried shear steel plate are connected with the connecting web plate in a one-to-one correspondence mode through connecting pieces.

8. The rib plate type fan foundation of claim 7,

the connecting piece is connecting plate group, each connecting plate group includes two connecting plates and a plurality of high-strength bolt, each set up the round hole that has preset aperture on the connecting plate, first pre-buried shear steel sheet with web or the pre-buried shear steel sheet of second with web is located two between the connecting plate, adopt high strength bolt runs through the round hole, and it is rotatory high strength bolt makes will first pre-buried shear steel sheet with web or the pre-buried shear steel sheet of second with web is tight fixed.

9. The rib type fan foundation of claim 8, wherein the male prefabricated module is provided with a first carrying portion extending from the second end surface of the first vertical protrusion toward the foundation ring for supporting the prefabricated steel cylinder;

the concave prefabricated module is provided with a second carrying part, and the second carrying part extends towards the direction of the foundation ring from the fourth end surface of the second vertical protruding part and is used for supporting the prefabricated steel cylinder.

10. The rib plate type fan foundation of claim 9, wherein the first circumferential locking hole is formed on the upper convex end and/or the lower concave end of the convex prefabricated module;

the second circumferential locking hole is formed on the lower protruding end and/or the upper recessed end of the female preform module.

11. The rib plate type fan foundation of claim 10, further comprising: and concrete is formed in the prefabricated steel cylinder, the space surrounded by the periphery of the prefabricated steel cylinder and all the convex prefabricated modules and all the concave prefabricated modules, and all the grouting holes.

12. The rib plate type fan base of claim 11,

the steel bar connecting structure also comprises a first reinforcement through hole group, a second reinforcement through hole group, a first connecting steel bar group and a second connecting steel bar group;

a plurality of first reinforcement penetrating holes in the first reinforcement penetrating hole group are close to the T-shaped flange and are arranged at intervals along the circumferential direction of the prefabricated steel cylinder;

a plurality of second reinforcement penetrating holes in the second reinforcement penetrating hole group are far away from the T-shaped flange and are arranged at intervals along the circumferential direction of the prefabricated steel cylinder;

the first reinforcement penetrating holes and the second reinforcement penetrating holes are arranged in a one-to-one correspondence mode along the bus direction of the prefabricated steel cylinder;

two first embedded steel bar threaded sleeves are arranged between each pair of the first embedded shear steel plates;

two second embedded steel bar threaded sleeves are arranged between each pair of the second embedded shear steel plates;

one end of each connecting steel bar in the first connecting steel bar group is correspondingly connected with one of the two first embedded steel bar threaded sleeves or one of the second embedded steel bar threaded sleeves, and the other end of each connecting steel bar group penetrates through the first steel bar penetrating hole and is positioned inside the prefabricated steel cylinder;

one end of each connecting steel bar in the second connecting steel bar group is correspondingly connected with the other one of the two first embedded steel bar threaded sleeves or the other one of the two second embedded steel bar threaded sleeves, and the other end of each connecting steel bar penetrates through the second bar penetrating hole and is located inside the prefabricated steel cylinder.

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