CN212715008U - Novel radial wall type fan foundation suitable for sloping field terrain - Google Patents
Novel radial wall type fan foundation suitable for sloping field terrain Download PDFInfo
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- CN212715008U CN212715008U CN202020944581.5U CN202020944581U CN212715008U CN 212715008 U CN212715008 U CN 212715008U CN 202020944581 U CN202020944581 U CN 202020944581U CN 212715008 U CN212715008 U CN 212715008U
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Abstract
The utility model discloses a novel radial wall type fan foundation suitable for sloping field topography, which comprises a bearing platform, an installation platform and a rib beam; bearing piles are arranged at the bottom of the bearing platform and are in one-to-one correspondence with the rib beams; the bearing piles comprise an upper bearing pile, a lower bearing pile and a middle transition pile; the top surfaces of the upper bearing pile, the lower bearing pile and the middle transition pile are flush, the height of the lower bearing pile is higher than that of the upper bearing pile, and the upper bearing pile and the lower bearing pile are arranged at two ends of the bottom surface of the bearing platform at intervals; the middle transition piles are arranged on two sides of a central connecting line of the upper bearing pile and the lower bearing pile, and the bottom surfaces of the middle transition piles and the lower bearing piles on the same side of the central connecting line of the upper bearing pile bottom surface, the upper bearing pile and the lower bearing pile are sequentially arranged in a step shape. The utility model provides a novel radial wall formula fan basis suitable for hillside fields topography can subtract the excavation and the backfill volume of fan place earth and rockfill side, reduces construction cost.
Description
Technical Field
The utility model relates to a fan foundation construction technical field especially relates to a novel radial wall formula fan basis suitable for hillside fields topography.
Background
The land wind power project can be divided into a flat land wind power project and a sloping land wind power project, and the patent technology mainly aims at the sloping land wind power project. The wind turbine foundation mainly adopted by the domestic wind power design unit often comprises a rib beam wind turbine foundation, an extension wind turbine foundation, a bearing platform pile wind turbine foundation, a rock anchor rod wind turbine foundation and the like, and if the foundation form is applied to sloping field terrains, the wind turbine site needs to be leveled firstly in construction. The flat fan field needs to meet the arrangement of a wind turbine foundation and the stacking and hoisting of various devices of fans such as fan blades, hubs and towers, the size of a fan platform is about 40M x 50M, the large platform needs to be built through excavation and filling on sloping land terrain, the excavation and filling engineering amount is large, the side slope treatment cost is high, the construction cost is high, the environment protection and water and soil conservation cost is high, the project economy is poor, and the landing of the project is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model provides a novel radial wall formula fan basis suitable for hillside fields topography can reduce the excavation and the backfill volume of fan place earth and rockfill to reduce construction cost.
The utility model provides a technical scheme that its technical problem adopted is: a novel radial wall type fan foundation suitable for sloping field terrains comprises a bearing platform, wherein an installation platform for installing a fan tower cylinder is arranged in the center of the top of the bearing platform, a connecting structure for connecting the bearing platform and the fan tower cylinder is pre-buried in the bearing platform, and the connecting structure penetrates through the installation platform and extends to the top of the installation platform; the bearing platform is fixedly provided with rib beams which are annularly and uniformly distributed by taking the vertical central axis of the mounting platform as a center, one end of each rib beam is fixedly connected with the mounting platform, the other end of each rib beam extends to the edge of the bearing platform and is flush with the edge of the bearing platform, the bottom of the bearing platform is provided with bearing piles, and the bearing piles and the rib beams are arranged in a one-to-one correspondence manner; the bearing piles comprise an upper bearing pile, a lower bearing pile and a middle transition pile; the top surfaces of the upper bearing pile, the lower bearing pile and the middle transition pile are flush, the height of the lower bearing pile is higher than that of the upper bearing pile, and the upper bearing pile and the lower bearing pile are arranged at two ends of the bottom surface of the bearing platform at intervals; the middle transition piles are arranged on two sides of a central connecting line of the upper bearing pile and the lower bearing pile, and the bottom surfaces of the middle transition piles and the lower bearing piles on the same side of the central connecting line of the upper bearing pile bottom surface, the upper bearing pile and the lower bearing pile bottom surface are sequentially arranged in a step shape.
Further, the bottom of the rib beam penetrates through the bearing platform and extends downwards to form the bearing pile.
Further, ring beams are arranged on the bearing platform and surround the vertical central axis of the mounting platform, and the adjacent rib beams are connected with each other in pairs through the ring beams.
Furthermore, the cushion cap is cylindrical, the ring beam is formed by protruding the edge of the cushion cap, and one end of the rib beam extends into the ring beam and is fixedly connected with the ring beam.
Further, the bottom of the upper bearing pile is provided with a first bearing seat, the bottom of the lower bearing pile is provided with a second bearing seat, and the bottom of the middle transition pile is provided with a third bearing seat.
Furthermore, a first step structure is arranged at the bottom of the upper bearing pile, a second step structure is arranged at the bottom of the lower bearing pile, and a third step structure is arranged at the bottom of the middle transition pile; the first bearing seat top is provided with a fourth stepped structure matched with the first stepped structure, the second bearing seat top is provided with a fifth stepped structure matched with the second stepped structure, and the third bearing seat top is provided with a sixth stepped structure matched with the third stepped structure.
Further, connection structure includes multiunit bolt assembly, and bolt assembly uses the vertical central axis of mount table to be circular equipartition as the center.
The utility model has the advantages that: the utility model discloses a novel radial wall formula fan basis suitable for hillside fields topography sets up the bearing pile bottom the cushion cap to support whole fan platform. In the process of excavating the earthwork, the slope part at the bottom of the bearing platform, which does not relate to the pouring of the bearing pile, can be free from excavation, so that the area and the square amount of the earthwork to be excavated can be reduced, and the civil engineering cost is saved.
Meanwhile, on the premise that the requirements for slope stability and enough bearing capacity of the bearing platform are met, the bottom surfaces of the upper bearing pile, the upper bearing pile and the lower bearing pile are sequentially arranged in a step shape, and the bottom surfaces of the middle transition pile and the lower bearing pile are arranged on the same side of the central connecting line of the upper bearing pile and the lower bearing pile. Therefore, pile holes for pouring the upper bearing pile, the middle transition pile and the lower bearing pile can be dug in a ladder shape, all hole piles do not need to be dug to the depth same as that of the deepest hole pile, the earthwork volume can be reduced, and the civil engineering cost is saved.
In addition, the design thought also reduces the later-stage slope support engineering quantity, can avoid the side slope of a filling area, indirectly reduces the excavation area of the fan field, and greatly reduces the excavation and backfilling of earth and stone in the fan field. The damage to the original environment is reduced, the better environment protection and water and soil conservation are facilitated, the civil engineering cost is greatly saved, and the economic cost control of the whole project is facilitated.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural diagram of a conventional rib beam wind turbine foundation;
FIG. 2 is an internal block diagram of a conventional rib beam wind turbine foundation;
fig. 3 is a schematic structural view of the novel ring-tube load-bearing type fan foundation for steep mountain landforms of the present invention;
fig. 4 is a top view of the novel ring-tube load-bearing wind turbine foundation for steep mountainous terrain of the present invention;
FIG. 5 is a left side view of the novel ring-barrel load-bearing wind turbine foundation of FIG. 4 for use in steep mountain terrain;
figure 6 is a schematic view of the structure of the lower load-bearing pile.
Reference numerals:
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "height", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "radial", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A novel radial wall type wind turbine foundation suitable for sloping field topography according to an embodiment of the present invention is described below with reference to fig. 1 to 4.
Referring to fig. 1 to 4, the novel radial wall type fan foundation applicable to sloping field terrains of the present invention includes a bearing platform 100, wherein an installation platform 101 for installing a fan tower cylinder is disposed at the center of the top of the bearing platform 100, a connection structure for connecting the bearing platform 100 and the fan tower cylinder is pre-embedded in the bearing platform 100, and the connection structure penetrates through the installation platform 101 and extends to the top of the installation platform 101; the bearing platform 100 is fixedly provided with rib beams 102, the rib beams 102 are annularly and uniformly distributed by taking the vertical central axis of the mounting platform 101 as the center, one end of each rib beam is fixedly connected with the mounting platform 101, the other end of each rib beam extends to the edge of the bearing platform 100 and is flush with the edge of the bearing platform 100, the bottom of the bearing platform 100 is provided with bearing piles 200, and the bearing piles 200 and the rib beams 102 are arranged in a one-to-one correspondence manner; the load-bearing piles 200 comprise upper load-bearing piles 201, lower load-bearing piles 202 and intermediate transition piles 203; the top surfaces of the upper bearing pile 201, the lower bearing pile 202 and the middle transition pile 203 are flush, the height of the lower bearing pile 202 is higher than that of the upper bearing pile 201, and the upper bearing pile 201 and the lower bearing pile 202 are oppositely arranged at two ends of the bottom surface of the bearing platform 100 at intervals; the middle transition piles 203 are arranged on two sides of a central connecting line of the upper bearing pile 201 and the lower bearing pile 202, and the bottom surfaces of the upper bearing pile 201, the middle transition piles 203 and the lower bearing pile 202 on the same side of the central connecting line of the upper bearing pile 201 and the lower bearing pile 202 are sequentially arranged in a step shape.
In the original rib beam 102 wind turbine foundation structure shown in fig. 1 and 2, an installation platform 101 is provided at the top center of a bearing platform 100, the installation platform 101 is used for installing a wind turbine tower, and a connection structure is used for cooperating with the installation platform 101 to install and position the wind turbine tower on the installation platform 101. The bearing platform 100 is fixedly provided with rib beams 102, and the rib beams 102 are annularly and uniformly distributed by taking a vertical central axis of the mounting platform 101 as a center. The upper end of the rib beam 102 is fixedly connected with the side surface of the mounting platform 101, and the lower end extends to the edge of the bearing platform 100 and is flush with the edge of the bearing platform 100. In particular, in the present embodiment, eight ribs 102 are provided, and the eight ribs 102 are uniformly distributed on the top of the platform 100.
As can be seen from fig. 1, the area of the bottom of the bearing platform 100 is large, and if the bearing platform 100 structure is directly applied to a slope, the excavation area of the earthwork is inevitably large, the volume of the earthwork is large, and the construction cost is high due to the fact that slope support is involved in the later period. Meanwhile, when concrete is poured, the height of the bearing platform 100 needs to be adjusted (the concrete layer of the bearing platform 100 at the lower end 502 of the slope is the highest, the middle part of the slope is the second, and the upper end 501 of the slope is the lowest), so that the bearing platform 100 and the installation platform 101 can be kept balanced, and in this way, the pouring amount of the concrete is necessarily large, and the construction cost of the fan foundation is increased.
As shown in fig. 3, the novel radial wall fan foundation suitable for sloping field topography of the present invention is further provided with the bearing piles 200 at the bottom of the bearing platform 100, and the bearing piles 200 are arranged in one-to-one correspondence with the rib beams 102, so that, in this embodiment, the bearing piles 200 are also provided with eight pieces. In the present embodiment, as shown in fig. 5, one load-bearing pile 200 located at the uppermost end of the slope is defined as an upper load-bearing pile 201, one load-bearing pile 200 located at the lowermost end of the slope is defined as a lower load-bearing pile 202, and the rest are all defined as intermediate transition piles 203, so that the number of the intermediate transition piles 203 may be two or more. In this embodiment, there are six middle transition piles 203, and there are three on each side of the central connecting line between the upper load-bearing pile 201 and the lower load-bearing pile 202.
As can be easily seen from fig. 3, in the case that the tops of the upper load-bearing pile 201, the middle transition pile 203 and the lower load-bearing pile 202 are flush (ensuring that the platform 100 and the mounting platform 101 are balanced to facilitate the installation of the wind turbine), the height of the lower load-bearing pile 202 is higher than that of the upper load-bearing pile 201, and the height of the middle transition pile 203 is between the two. In addition, in this embodiment, the bottom surface of the upper load-bearing pile 201, the bottom surface of the middle transition pile 203 on the same side of the center connecting line of the upper load-bearing pile 201 and the lower load-bearing pile 202, and the bottom surface of the lower load-bearing pile 202 are sequentially arranged in a step shape. Then, in the present embodiment, as shown in fig. 3 and 4, the upper load-bearing pile 201, the first intermediate transition pile 203, the second intermediate transition pile 203, the third intermediate transition pile 203 and the lower load-bearing pile 202 located at the left side of the central connecting line of the upper load-bearing pile 201 and the lower load-bearing pile 202 form a five-step structure from top to bottom. Similarly, the upper load-bearing pile 201, the fourth intermediate transition pile 203, the fifth intermediate transition pile 203, the sixth intermediate transition pile 203 and the lower load-bearing pile 202 which are located on the right side of the central connecting line of the upper load-bearing pile 201 and the lower load-bearing pile 202 form another five-step ladder structure from top to bottom.
It is easily conceivable that when there are two intermediate transition piles 203, one on each side of the line of centres of the upper load-bearing pile 201 and the lower load-bearing pile 202. Only a three-step ladder structure of upper load-bearing piles 201, intermediate transition piles 203 and lower load-bearing piles 202 is formed. The specific step structure is determined according to the specific slope environment (such as the inclination angle of the slope, the geological structure of the slope, etc.).
In summary, the bearing piles 200 are disposed at the bottom of the platform 100 to support the whole wind turbine platform. In the process of excavating the earthwork, the slope part at the bottom of the bearing platform 100, which does not relate to the pouring of the bearing pile 200, does not need to be excavated, so that the area and the square amount of the earthwork to be excavated can be reduced, and the civil engineering cost is saved. Meanwhile, on the premise that the slope stability and the bearing capacity of the bearing platform 100 are sufficient, the bottom surfaces of the upper bearing pile 201, the middle transition pile 203 and the lower bearing pile 202 are sequentially arranged in a step shape, wherein the bottom surface of the middle transition pile 203 and the bottom surface of the lower bearing pile 202 are on the same side of the central connecting line of the upper bearing pile 201 and the lower bearing pile 202. Therefore, pile holes for pouring the upper bearing pile 201, the middle transition pile 203 and the lower bearing pile 202 are dug in a step shape, all hole piles do not need to be dug to the same depth as the deepest hole pile, the bearing platform 100 and the mounting platform 101 can be guaranteed to be balanced, the earthwork volume can be reduced, and the civil engineering cost is saved.
In this embodiment, as shown in fig. 3, in order to make the overall structure of the wind turbine foundation more compact, the load-bearing piles 200 are formed by extending the rib beams 102 through the platform 100 and extending downward. Meanwhile, a ring beam 103 is arranged on the bearing platform 100, the ring beam 103 is arranged around the vertical central axis of the mounting platform 101, and the adjacent rib beams 102 are connected in pairs. In particular, in the present embodiment, the platform 100 is cylindrical, the ring beam 103 is formed by the upward protrusion of the edge of the platform 100, and the lower end of the rib beam 102 extends into the ring beam 103 and is fixedly connected with the ring beam 103. The design idea can also enhance the stability and increase the bearing capacity of the fan foundation while ensuring the compactness of the whole structure of the fan foundation. In particular, in the present embodiment, the bearing platform 100, the installation platform 101, the rib beam 102, and the ring beam 103 are all cast and formed by reinforced concrete.
As shown in fig. 3, in order to enhance the bearing capacity of the wind turbine foundation, in this embodiment, a first bearing seat 204 is further disposed at the bottom of the upper bearing pile 201, a second bearing seat 205 is disposed at the bottom of the lower bearing pile 202, and a third bearing seat 206 is disposed at the bottom of the middle transition pile 203. Each bearing seat is also formed by pouring concrete and poured on the bearing layer of the foundation, and the bottom area of each bearing seat is larger than that of the corresponding bearing pile 200, so that the bearing capacity of the fan foundation can be improved. The specific transfer path of the fan load is as follows: the load of the fan unit is transmitted to the upper mounting platform 101 through the fan tower, the mounting platform 101 is transmitted to the bearing platform 100 and the bearing pile 200, and the load is transmitted to each bearing seat after the internal stress of the bearing platform 100 and the bearing pile 200 is redistributed.
As shown in fig. 3 and 6, in the present embodiment, the upper load-bearing pile 201 is provided with a first step structure at the bottom, the lower load-bearing pile 202 is provided with a second step structure at the bottom, and the middle transition pile 203 is provided with a third step structure at the bottom. Correspondingly, the top of the first bearing seat 204 is provided with a fourth step structure matched with the first step structure, the top of the second bearing seat 205 is provided with a fifth step structure matched with the second step structure, and the top of the third bearing seat 206 is provided with a sixth step structure matched with the third step structure. In this way, the earth excavation amount of the 200-hole pile of the bearing pile can be reduced, and the civil engineering cost is saved.
For ease of understanding, the following description will be given by way of example of the load-bearing pile 202 and the second step structure provided at the bottom thereof. A schematic view of the structure of the lower load-bearing pile 202 is shown in figure 6. As shown in fig. 3 and 6, the top of the lower bearing column 202 is a rib 102, and the bottom of the rib 102 passes through the platform 100 and extends to the lower part of the platform 100 to form a lower bearing pile 202. The lower load-bearing pile 202 is divided into two parts, the left part in the figure is located at the lower end 502 of the slope and the right part extends towards the upper end 501 of the slope and is located in the middle of the slope, according to the structural characteristics of the slope. The left part and the right part are arranged in a step shape (namely a second step structure is formed). Thus, when excavating the earth, the bottom of the right side of the lower load-bearing pile 202 does not need to be dug to be flush with the bottom of the left side of the lower load-bearing pile 202, and the foundation bearing layer can be reached, so that the excavation can be continued. Therefore, the excavation volume of the hole pile is reduced, the civil engineering cost is saved, and the pouring volume of concrete can be reduced during later pouring. Meanwhile, in order to match with the second step structure, a fifth step structure adapted to the second step structure is disposed on the top of the second bearing seat 205. Similarly, the first step structure and the third step structure are also arranged according to the sloping terrain structure.
In this embodiment, the connecting structure includes a plurality of sets of bolt assemblies 104, and the bolt assemblies 104 are uniformly distributed in a circular shape with the vertical central axis of the mounting platform 101 as the center. Bolt assemblies 104 are configured to couple to the wind turbine tower and cooperate with mounting platform 101 to mount and position the wind turbine tower on mounting platform 101. In another embodiment, the connection structure comprises a connection ring, and a connection flange connected to the wind turbine tower is provided on the top of the connection ring, and similarly, the connection flange is used to cooperate with the mounting platform 101 to mount and position the wind turbine tower on the mounting platform 101.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular 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 invention. In this specification, the schematic representations of the terms used above do not necessarily 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.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. The novel radial wall type fan foundation applicable to sloping field terrains comprises a bearing platform (100), wherein an installation platform (101) for installing a fan tower cylinder is arranged in the center of the top of the bearing platform (100), a connecting structure for connecting the bearing platform (100) and the fan tower cylinder is embedded in the bearing platform (100), and the connecting structure penetrates through the installation platform (101) and extends to the top of the installation platform (101); bearing platform (100) are gone up and are set firmly rib beam (102), rib beam (102) use the vertical central axis of mount table (101) as central annular equipartition, its one end and mount table (101) fixed connection, the other end extend to bearing platform (100) edge and with bearing platform (100) edge parallel and level, its characterized in that:
the bottom of the bearing platform (100) is provided with bearing piles (200), and the bearing piles (200) are arranged in one-to-one correspondence with the rib beams (102); the bearing pile (200) comprises an upper bearing pile (201), a lower bearing pile (202) and a middle transition pile (203); the top surfaces of the upper bearing pile (201), the lower bearing pile (202) and the middle transition pile (203) are flush, the height of the lower bearing pile (202) is higher than that of the upper bearing pile (201), and the upper bearing pile (201) and the lower bearing pile (202) are oppositely arranged at two ends of the bottom surface of the bearing platform (100) at intervals;
the middle transition piles (203) are arranged on two sides of a central connecting line of the upper bearing pile (201) and the lower bearing pile (202), and the bottom surfaces of the middle transition piles (203) and the lower bearing piles (202) on the same side of the central connecting line of the bottom surface of the upper bearing pile (201), the upper bearing pile (201) and the lower bearing pile (202) are sequentially arranged in a step shape.
2. The novel radial wall type fan foundation applicable to sloping field terrains as claimed in claim 1, wherein: the bottom of the rib beam (102) penetrates through the bearing platform (100) and extends downwards to form a bearing pile (200).
3. The novel radial wall type fan foundation applicable to sloping field terrains as claimed in claim 2, wherein: and ring beams (103) are arranged on the bearing platform (100) and surround the vertical central axis of the mounting platform (101), and the adjacent rib beams (102) are connected with each other by the ring beams (103).
4. The novel radial wall type fan foundation applicable to sloping field terrains as claimed in claim 3, wherein: the bearing platform (100) is cylindrical, the ring beam (103) is formed by protruding the edge of the bearing platform (100), and one end of the rib beam (102) extends into the ring beam (103) and is fixedly connected with the ring beam (103).
5. The novel radial wall type wind turbine foundation applicable to sloping field terrains as claimed in any one of claims 1 to 4, wherein: the bottom of the upper bearing pile (201) is provided with a first bearing seat (204), the bottom of the lower bearing pile (202) is provided with a second bearing seat (205), and the bottom of the middle transition pile (203) is provided with a third bearing seat (206).
6. The novel radial wall type fan foundation applicable to sloping field terrains as claimed in claim 5, wherein: a first step structure is arranged at the bottom of the upper bearing pile (201), a second step structure is arranged at the bottom of the lower bearing pile (202), and a third step structure is arranged at the bottom of the middle transition pile (203); the top of the first bearing seat (204) is provided with a fourth stepped structure matched with the first stepped structure, the top of the second bearing seat (205) is provided with a fifth stepped structure matched with the second stepped structure, and the top of the third bearing seat (206) is provided with a sixth stepped structure matched with the third stepped structure.
7. The novel radial wall type fan foundation applicable to sloping field terrains as claimed in claim 1, wherein: the connecting structure comprises a plurality of groups of bolt assemblies (104), and the bolt assemblies (104) are circularly and uniformly distributed by taking the vertical central axis of the mounting platform (101) as the center.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020944581.5U CN212715008U (en) | 2020-05-28 | 2020-05-28 | Novel radial wall type fan foundation suitable for sloping field terrain |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020944581.5U CN212715008U (en) | 2020-05-28 | 2020-05-28 | Novel radial wall type fan foundation suitable for sloping field terrain |
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| CN212715008U true CN212715008U (en) | 2021-03-16 |
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| CN202020944581.5U Active CN212715008U (en) | 2020-05-28 | 2020-05-28 | Novel radial wall type fan foundation suitable for sloping field terrain |
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