Supporting leg type tower foundation device and manufacturing and mounting method

Abstract

The invention discloses a supporting leg type tower foundation device and a manufacturing and installing method, and relates to the technical field of wind energy equipment.The tower foundation device comprises a base system, the base system is located under the ground, the tower foundation device further comprises a foundation ring system and a supporting leg system, the foundation ring system comprises a foundation ring body, and the foundation ring body is higher than the ground; the supporting leg system comprises a plurality of supporting rods, one ends of the supporting rods are fixedly connected with the foundation ring body, the other ends of the supporting rods are fixedly connected with the base system, and the foundation ring system is used for being connected with a tower. A connecting foundation on a foundation is provided through the base system, and the supporting leg system lifts the foundation ring body to a certain distance above the ground and stably connects and supports the foundation ring system. Through a space beam-column structure system of the supporting leg system, the top elevation of the tower foundation device is raised on the basis of ensuring the mechanical stability of the tower foundation device, so that the engineering quantity of the foundation and the tower is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power equipment, and more particularly to a support leg type tower foundation device and a manufacturing and installation method. BACKGROUND

[0002] A wind turbine is a turbine that uses wind energy as power. The body is erected on the ground through a tower structure, and the bottom of the tower is fixed to the ground through a foundation support device.

[0003] Most of the current land wind turbine support structures use a cast-in-place gravity type foundation. This type of foundation includes a plate below the ground, anchor rods inserted into the foundation, and a foundation flange. The plate below the ground is usually cast in place by reinforced concrete and connected to the foundation by anchor rods; the tower structure to be supported is connected to the plate through the foundation flange. Before and after the construction of this type of foundation, the foundation and the backfill need to be excavated. The amount of concrete, steel, anchor rods, and the amount of foundation and backfill engineering depends on the external load acting on the support structure or tower and the size of the support structure or tower.

[0004] Although this type of foundation provides stable load-bearing and support performance, it has defects and / or deficiencies in some special application scenarios, especially when applied to large-capacity wind turbines, high loads, and large-size wind turbine tower structures. The top elevation of this type of foundation is relatively low, which will cause the connection between the foundation and the tower structure to be subjected to greater torque, and the diameter and / or span of the tower and foundation need to be increased to provide sufficient resistance to such torque. The increase in the diameter and / or span of the tower and foundation not only leads to an increase in material usage and engineering costs, but also faces limitations in transportation conditions.

[0005] In summary, how to improve the top elevation of the tower foundation device is a problem that needs to be solved by the technical personnel in the field. SUMMARY

[0006] Therefore, the purpose of the present application is to provide a support leg type tower foundation device and a manufacturing and installation method, which improves the top elevation of the tower installation foundation and effectively improves the mechanical stability of the tower foundation device without excessive waste of raw materials.

[0007] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0008] The application discloses a support leg type tower foundation device which comprises a base system, a foundation ring system and a support leg system, wherein the base system is located below the ground, the base system comprises a plurality of base blocks and base connecting beams, the foundation ring system comprises a foundation ring body which is higher than the ground, and the support leg system comprises a plurality of support rods, one end of each of the support rods is fixedly connected with the foundation ring body, and the other end is fixedly connected with the base system, and the foundation ring system is used for being connected with a tower.

[0009] Preferably, the base system comprises a plurality of base blocks and a plurality of base connecting beams, the plurality of base blocks are arranged in an array in the horizontal direction, one base block is fixedly connected with the end of one or more support rods, and two adjacent base blocks are fixedly connected through the base connecting beam.

[0010] Preferably, the support leg system has a plurality of support leg systems which are arranged in an annular array around the axis of the foundation ring body, the base blocks comprise independent base blocks and shared base blocks, one independent base block is connected with one support rod, one shared base block is connected with the support rods of a plurality of support leg systems at the same time, and the shared base block is closer to the axis of the foundation ring body than the independent base block.

[0011] Preferably, the foundation ring body comprises a plurality of prefabricated foundation arc pieces which are arranged in an annular array, the end of each prefabricated foundation arc piece is fixedly connected with a connecting member, the connecting members of two adjacent prefabricated foundation arc pieces are fixedly connected, the number of the prefabricated foundation arc pieces is consistent with the number of the support leg systems, and the ends, away from the base system, of all the support rods of one support leg system are fixedly connected with the same connecting member.

[0012] Preferably, the support leg system further comprises a cross brace, two adjacent support rods are connected with the same cross brace and are fixed relative to each other, and the connecting points between the cross brace and the support rods are located in the middle of the support rods.

[0013] Preferably, the support leg system further comprises a tensioning system, the tensioning system comprises a prestressed cable, one end of the prestressed cable is connected with the foundation ring body, and the other end is connected with the base block, the base connecting beam or the foundation.

[0014] Preferably, the prestressed cable passes through the foundation ring body and the support rod, the support rod and the foundation ring body are embedded with a sleeve pipe for the prestressed cable to pass through; the top of the foundation ring body is provided with a fixing device, the base block is fixedly connected with a connecting piece, one end of the prestressed cable is connected with the fixing device, and the other end is connected with the connecting piece.

[0015] Preferably, the base ring system further comprises one or more auxiliary rings, the auxiliary rings are coaxial with the base ring body and located below the base ring body, vertical support rods are fixedly connected between the auxiliary rings and the base ring body or between two adjacent auxiliary rings; auxiliary support rods are connected between the auxiliary rings and the base blocks or the base connecting beams.

[0016] Preferably, the base system further comprises a pile body, the pile body is inserted into the ground, and the top end of the pile body is fixedly connected with the bottom of the base block.

[0017] A manufacturing and installation method of the support leg type tower foundation device, sequentially comprising the following steps:

[0018] Excavate a foundation pit at a construction site and level the pit bottom, and build a concrete cushion layer at the bottom of the foundation pit;

[0019] Install the base blocks at the preset positions on the surface of the concrete cushion layer, and connect two adjacent base blocks through the base connecting beams, and the base system is completed;

[0020] Install the support leg system, and connect one end of the support rod with the base system;

[0021] Install the base ring system, and fixedly connect the base ring body with the other end of the support rod away from the base system;

[0022] Install the tensioning system, and fixedly connect one end of the prestressed cable with the base ring body and the other end with the base system;

[0023] Backfill and compact the foundation pit.

[0024] The support leg type tower foundation device and the manufacturing and installation method provided by the application, the base ring system as the connecting point of the bottom of the tower, through the base system and the support leg system, the base ring system is lifted relative to the ground, thereby lifting the top elevation of the tower foundation, thereby reducing the moment of the wind power tower and the foundation device at the connection, and thereby reducing the size and material usage of the foundation and the tower structure while maintaining the stability of the foundation mechanics. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor based on the provided drawings.

[0026] Figure 1 The overall structure schematic diagram for embodying the support leg type tower foundation device in the embodiments;

[0027] Figure 2 Fig. 6 is a schematic diagram of the connection structure of each component when the foundation ring body is formed by using a ring reinforcement cage for site formwork pouring in the embodiment;

[0028] Figure 3 Fig. 7 is a schematic diagram of the connection structure of each component when the foundation ring body is formed by using a plurality of precast foundation arc pieces in the embodiment;

[0029] Figure 4 Fig. 8 is a schematic diagram of the structure when the number of shared pedestals is three in the embodiment;

[0030] Figure 5 Fig. 9 is a schematic diagram of the structure when the support leg system includes a cross brace in the embodiment;

[0031] Figure 6 Fig. 10 is a schematic diagram of the structure of the first setting mode of the tensioning system in the embodiment;

[0032] Figure 7 Fig. 11 is a schematic diagram of the structure of the second setting mode of the tensioning system in the embodiment;

[0033] Figure 8 Fig. 12 is a schematic diagram of the structure when the foundation ring system includes an auxiliary ring and a vertical brace in the embodiment;

[0034] Figure 9 Fig. 13 is a schematic diagram of the structure when the pedestal system further includes a pile body in the embodiment;

[0035] Figure 10 Fig. 14 is a flowchart of the manufacturing and installation method of the support leg type tower foundation device in the embodiment;

[0036] Figure 11 Fig. 15 is a schematic diagram of the structure after the foundation pit is excavated in the embodiment;

[0037] Figure 12 Fig. 16 is a schematic diagram of the structure of the support leg type tower foundation device after the backfilling of the foundation pit is completed in the embodiment.

[0038] Figures 1-12 In the drawings, reference signs include:

[0039] 1, foundation; 11, concrete cushion; 2, base system; 21, pile body; 22, base block; 221, independent base; 222, shared base; 23, base coupling beam; 3, support leg system; 31, support rod; 32, cross brace; 4, foundation ring system; 41, foundation ring body; 411, ring-shaped reinforcement cage; 42, prefabricated foundation arc piece; 421, connecting member; 43, auxiliary ring; 44, vertical brace; 45, auxiliary brace; 5, tensioning system; 51, prestressed cable; 52, fixing device; 53, sleeve; 54, connecting piece; 541, connecting steel plate; 542, adapter rod; 543, adapter ring buckle; 6, tower; 61, flange. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0041] Unless otherwise defined, technical or scientific terms used in the present disclosure should be understood as having the same meaning as commonly understood by one of ordinary skill in the art to which this present disclosure belongs. The terms "first", "second", and similar terms used in the present disclosure do not necessarily denote any order, quantity, or importance. The terms "connected", "coupled", and similar terms are not limited to a physical or mechanical connection or coupling, but can include an electrical connection or coupling, whether direct or indirect. The terms "upper", "lower", "left", "right", and similar terms are used only to indicate relative positions, and when the absolute positions of the described objects are changed, the relative positions can also be changed accordingly. The embodiments of the present application disclose a support leg type tower foundation device and a manufacturing and installation method.

[0042] The core of the present application is to provide a support leg type tower foundation device and a manufacturing and installation method.

[0043] Please refer to Figure 1 .

[0044] The support leg type tower foundation device provided by the present application comprises a base system 2, a support leg system 3, and a foundation ring system 4. The base system 2 is located at the bottom, the support leg system 3 is connected above the base system 2, and the foundation ring system 4 is connected above the support leg system 3. The base system 2 is connected with the foundation 1, the foundation ring system 4 is connected and fixed with the base system 2 through the support leg system 3, and the foundation ring system 4 is used for connecting and fixing the bottom of the tower 6 of the wind power tower.

[0045] As Figure 1As shown, the foundation ring system 4 includes a foundation ring body 41, the axis of which is perpendicular to the ground, the support leg system 3 includes a plurality of support rods 31, and the base system 2 includes a plurality of base blocks 22 and base connecting beams 23. In this embodiment, the support leg system 3 has three, which are arranged in an array around the axis of the foundation ring body 41, and the number of support rods 31 of a single support leg system 3 is three. The upper ends of the three support rods 31 converge at one point and are connected to the foundation ring body 41, and the lower ends are respectively connected to different base blocks 22. The connection points of each support leg system 3 and the foundation ring body 41 are arranged in a ring array. The base block 22 includes an independent base 221 and a shared base 222. In this embodiment, each base block 22 is in the shape of a flat cylinder. A single independent base 221 is connected to one support rod 31, and a single shared base 222 is connected to the support rods 31 of multiple support leg systems 3. The number of independent bases 221 is six, and the number of shared bases 222 is one. The shared base 222 is located in the middle and coaxial with the foundation ring body 41. Multiple independent bases 221 are arranged around the shared base 222 in a ring array, and the bottom end of one of the support rods 31 of each support leg system 3 is connected to the shared base 222. In actual construction, the shape of each base block 22 and the specific number of independent bases 221 and shared bases 222 can be adjusted as needed.

[0046] As shown in Figure 1 , all base blocks 22 are at the same height. The shared base 222 and each independent base 221, as well as each adjacent two independent bases 221, are fixedly connected through the base connecting beam 23, so that each support leg system 3 forms a stable tripod structure.

[0047] As shown in Figure 2 , the foundation ring body 41 is made of a ring-shaped reinforcement cage 411 cast in place, and the support rods 31 and the base blocks 22 can be formed by cast-in-place construction using a reinforced concrete structure or assembled on site by precast components. When each component is a precast component, the support rods 31, the base connecting beams 23, and the base blocks 22 all have exposed reinforcement structures, and each connection position is bound or welded with a reinforcement structure. After assembly, the connection position is poured with concrete through formwork, thereby achieving connection.

[0048] As shown in Figure 1 , the foundation ring body 41 is coaxially connected to the tower 6 above. The foundation ring body 41 is preformed with bolt holes through its thickness, and the flange 61 structure at the bottom of the tower 6 is fixed to the top of the foundation ring body 41 by bolts.

[0049] In another specific embodiment, referring to Figure 3The base ring body 41 is composed of a plurality of prefabricated base arc pieces 42, which are reinforced concrete components in the shape of a circular arc. The plurality of prefabricated base arc pieces 42 are arranged in a circular array. The end of each prefabricated base arc piece 42 is provided with a connecting component 421 of a reinforcing structure. The adjacent two prefabricated base arc pieces 42 are welded or tied and fixed by the connecting component 421, and then connected with the reinforcing steel at the top end of the support rod 31. The position between each adjacent two prefabricated base arc pieces 42 corresponds to the top end of a base system 2, that is, the number of prefabricated base arc pieces 42 in the embodiment is consistent with the number of support leg systems 3.

[0050] In another specific embodiment, referring to Figure 4 , the number of shared bases 222 and independent bases 221 in the embodiment is three. Each shared base 222 and each independent base 221 is arranged in a circular array around the axis of the base ring body 41. The three shared bases 222 are closer to the axis of the base ring body 41 than the three independent bases 221. A single shared base 222 is connected with the bottom end of the support rod 31 from two different support leg systems 3. The adjacent independent bases 221, the adjacent shared bases 222, and the independent bases 221 and the shared bases 222 can be connected and reinforced by the base connecting beams 23 (not shown in the figure).

[0051] In one specific embodiment, referring to Figure 5 , the support leg system 3 further includes a cross brace 32. Within one support leg system 3, the adjacent two support rods 31 and the same cross brace 32 are fixed by bolt connection. The end of the cross brace 32 is provided with a through hole for the bolt to pass through, and the middle of the support rod 31 is pre-buried with a bolt. During installation, the bolt passes through the cross brace 32 and is threadedly connected with a nut. Tightening the nut can reinforce the support rod 31 and the cross brace 32, and improve the structural stability between the adjacent two support rods 31.

[0052] In another specific embodiment, referring to Figure 6 and 7Further comprising a tensioning system 5, the tensioning system 5 comprising a prestressed cable 51, one end of the prestressed cable 51 being fixedly connected with the foundation ring 41, the other end being fixedly connected with the base block 22, the base connecting beam 23 or the foundation 1, for improving the stability of the relative state of the foundation ring 41 relative to the base system 2 or the foundation 1. The first mode: the prestressed cable 51 is arranged between two adjacent support rods 31 outside the support leg system 3; the foundation ring 41 is pre-provided with a sleeve 53 for the prestressed cable 51 to pass through, the length direction of the sleeve 53 being parallel to the axis of the foundation ring 41; the top of the foundation ring 41 is provided with a fixing device 52, one end of the prestressed cable 51 being connected with the fixing device 52, the other end extending downward and being fixedly connected with the middle part of the base connecting beam 23. The fixing device 52 can be an anchor seat, etc. The second mode: the support rod 31 is also pre-provided with a sleeve 53, the length direction of the sleeve 53 being parallel to the length direction of the support rod 31, the prestressed cable 51 sequentially passing through the sleeve 53 of the foundation ring 41 and the sleeve 53 of the support rod 31, and then extending downward to the independent base 221, the foundation 1 above or below the independent base 221 being fixedly provided with a connecting piece 54, the connecting piece 54 comprising steel plates 541, adapter rods 542 and adapter ring buckles 543 which are fixedly connected with each other from bottom to top, the steel plates being fixedly connected with the steel structure in the base block 22 or being fixedly connected with the foundation 1, the end of the prestressed cable 51 being fixedly connected with the adapter ring buckle 543 through a lock buckle. The prestressed cable 51 in the support rod 31 can also be connected with the shared base 222, the connection method being the same as that when connected with the independent base 221.

[0053] In another specific embodiment, with reference to Figure 8, the base ring system 4 further comprises one or more auxiliary rings 43, the auxiliary ring 43 is coaxial with the base ring body 41 and is located below the base ring body 41, and a vertical support rod 44 is fixedly connected between the auxiliary ring 43 and the base ring body 41 or between two adjacent auxiliary rings 43; when the number of auxiliary rings 43 is one, one end of the vertical support rod 44 is fixedly connected with the lower end surface of the base ring body 41, and the other end is fixedly connected with the upper end surface of the auxiliary ring 43; the base system 2 no longer has a shared base 222, the auxiliary ring 43 is located at the same height as the base block 22, and the auxiliary ring 43 is fixedly connected with the independent base 221 or the base connecting beam 23 through the auxiliary support rod 45. When there are multiple auxiliary rings 43, the lowermost auxiliary ring 43 is located at the same height as the base block 22, and the auxiliary ring 43 at a higher position is fixedly connected with the independent base 221 or the base connecting beam 23 through the auxiliary support rod 45 (the auxiliary support rod 45 of the lowermost auxiliary ring 43 is connected with the independent base 22, and the auxiliary support rod 45 of the auxiliary ring 43 at a higher position is connected with the base connecting beam 23). In this embodiment, the auxiliary ring 43, the vertical support rod 44 and the auxiliary support rod 45 are all prefabricated reinforced concrete components, which are connected through welding and formwork casting process at the steel structure ends of the vertical support rod 44 and the auxiliary support rod 45. However, in specific implementation, the auxiliary ring 43, the vertical support rod 44 and the auxiliary support rod 45 can also be constructed by site pouring or a combination of partial prefabrication and site pouring.

[0054] As shown in Figure 9 , the base system 2 can further comprise a pile body 21, which is vertically punched into the ground, and the top end thereof is fixedly connected with the base block 22; a single base block 22 can be connected with one or more pile bodies 21, which is used to improve the connection and fastening degree of each base block 22 and the foundation 1.

[0055] On the other hand, the application also provides a manufacturing and installation method of the above-mentioned support leg type tower foundation device, as shown in Figures 10-12 , the steps are as follows:

[0056] S1: pit excavation, reinforcement and leveling: excavate a pit in the construction site and level the pit bottom, lay a concrete cushion 11 on the bottom of the pit, and maintain it until it is solidified; when the geological conditions are poor, the pile body 21 can be vertically punched into the pit bottom at the preset position before laying the concrete cushion 11, and the position of the pile body 21 corresponds to the position of the base block 22 to be installed.

[0057] S2: Install the base system 2: Install the base block 22 on the surface of the concrete cushion 11 at the predetermined position, the base block 22 is a concrete prefabricated part, the bottom of each base block 22 is connected with the lower concrete cushion 11 through the adhesive such as concrete; when the pile 21 is pre-punched in the foundation 1, the base block 22 needs to be connected with the pile 21 at the bottom through the reinforced concrete pouring. And make the adjacent two base blocks 22 connected through the base connecting beam 23, the exposed steel bars at the end of the base connecting beam 23 and the side of the base block 22 are connected through welding and / or binding, and then the concrete is poured at the connection position to reinforce, so that the base system 2 is formed.

[0058] S3: Install the support leg system 3: connect one end of the support rod 31 with the base system 2, hoist the support rod 31 to the specified position, and connect the exposed steel bars at the bottom with the exposed steel bars at the top of the base block 22 through welding and / or binding, and then pour concrete at the connection area to reinforce, and after the concrete is solidified, each support leg system 3 is formed.

[0059] S4: Install the foundation ring system 4: whether the foundation ring body 41 is integrally poured with the ring-shaped reinforcement cage 411 or spliced with the prefabricated foundation arc piece 42, the steel bars at the top of the support rod 31 and the steel bars at the end of the ring-shaped reinforcement cage 411 or the prefabricated foundation arc piece 42 are connected through welding and / or binding during installation, and then concrete is poured at the connection area to reinforce, and after the concrete is solidified, the foundation ring system 4 is formed. When the auxiliary ring 43 and the vertical support rod 44 are required by design, the auxiliary ring 43, the vertical support rod 44 and the auxiliary support rod 45 are constructed in order from low to high before S3.

[0060] S5: Install the tensioning system 5: for the case where the tensioning system 5 needs to be set, during the installation of the support leg system 3, one end of the prestressed cable 51 is connected to the base system 2 and fixed with the connector 54 on the base block 22, the base connecting beam 23 or the foundation 1 below the base system 2. The other end of the prestressed cable 51 is not connected at this stage. After the foundation ring body 41 is poured and set, the end of the prestressed cable 51 away from the base system 2 is connected with the fixing device 52 above the foundation ring body 41, and prestress is applied; after the prestress is applied, cement or other adhesives need to be injected into the sleeve through which the prestressed cable passes. For the case where the cross brace 32 needs to be installed according to the design, after the connection of the prestressed cable 51 is completed, the cross brace 32 is installed and fixed through bolts.

[0061] S6: Backfill and compact the foundation pit: the foundation 1 after backfilling is higher than the ground level and is within the height range of the support leg system 3.

[0062] The support leg type tower foundation device and the manufacturing and installation method described above raise the top elevation of the foundation device, effectively solving the problem of low top elevation of the foundation device of the wind turbine tower 6 and insufficient large moment bearing capacity.

[0063] The various embodiments described in this specification are presented for the purpose of illustrating embodiments of the application and not for a purpose of limiting the same. The various embodiments described in this specification can be combined with each other in any manner.

[0064] The above has carried on the detailed introduction to the support leg type tower foundation device and the manufacturing installation method provided by the application. The principle and implementation mode of the application are described by applying specific examples in this paper, and the above embodiment description is only used to help understand the method and core idea of the application. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the application without departing from the principle of the application, and these improvements and modifications also fall within the protection scope of the application.

Claims

1. A support-leg type tower foundation device, comprising a base system (2), said base system (2) being located below ground level, characterized in that, It also includes a base ring system (4) and a support leg system (3). The base ring system (4) includes a base ring body (41) which is higher than the ground. The support leg system (3) includes multiple support rods (31). One end of each support rod (31) is fixedly connected to the base ring body (41), and the other end is fixedly connected to the base system (2). The base ring system (4) is used to connect with the tower (6).

2. The support-leg tower foundation device according to claim 1, characterized in that, The base system (2) includes multiple base blocks (22) and multiple base connecting beams (23). The multiple base blocks (22) are arranged in a horizontal array. The ends of a single base block (22) and one or more support rods (31) are fixedly connected. Adjacent base blocks (22) are fixedly connected to each other through the base connecting beams (23).

3. The support-leg type tower foundation device according to claim 2, characterized in that, There are multiple support leg systems (3), and the multiple support leg systems (3) are arranged in a ring array around the axis of the base ring (41). The base block (22) includes an independent base (221) and a shared base (222). Each independent base (221) is connected to a support rod (31), and each shared base (222) is simultaneously connected to the support rods (31) of multiple support leg systems (3). The shared base (222) is closer to the axis of the base ring (41) than the independent base (221).

4. The support-leg tower foundation device according to claim 3, characterized in that, The base ring (41) includes multiple prefabricated base arc plates (42), which are arranged in a ring array. The ends of the prefabricated base arc plates (42) are fixedly connected to connecting members (421). The connecting members (421) of two adjacent prefabricated base arc plates (42) are fixedly connected. The number of prefabricated base arc plates (42) is the same as the number of the support leg system (3). The end of all the support rods (31) of a single support leg system (3) away from the base system (2) is fixedly connected to the same connecting member (421).

5. The support-leg tower foundation device according to any one of claims 2-4, characterized in that, The support leg system (3) also includes a cross brace (32), two adjacent support rods (31) and the same cross brace (32) are connected and relatively fixed, and the connection point of the cross brace (32) and the support rod (31) is located in the middle of the support rod (31).

6. The support-leg tower foundation device according to any one of claims 2-4, characterized in that, It also includes a tensioning system (5), which includes a prestressed cable (51), one end of which is connected to the foundation ring (41), and the other end is connected to the base block (22), the base connecting beam (23), or the foundation (1).

7. The support-leg tower foundation device according to claim 6, characterized in that, The prestressed cable (51) passes through the foundation ring (41) and the support rod (31). The support rod (31) and the foundation ring (41) are fitted with sleeves (53) for the prestressed cable (51) to pass through. The foundation ring (41) is provided with a fixing device (52) at the top. A connector (54) is fixedly connected to the base block (22). One end of the prestressed cable (51) is connected to the fixing device (52), and the other end is connected to the connector (54).

8. The support-leg tower foundation device according to claim 2, characterized in that, The base ring system (4) further includes one or more auxiliary rings (43), the auxiliary rings (43) are coaxial with the base ring body (41) and located below the base ring body (41), and vertical support rods (44) are fixedly connected between the auxiliary rings (43) and the base ring body (41) or between two adjacent auxiliary rings (43); auxiliary support rods (45) are connected between the auxiliary rings (43) and the base block (22) or the base connecting beam (23).

9. The support-leg tower foundation device according to any one of claims 2-4 and 8, characterized in that, The base system (2) also includes a pile (21) inserted into the ground, the top of the pile (21) being fixedly connected to the bottom of the base block (22).

10. A method for manufacturing and installing a support-leg tower foundation device as described in claim 6 or 7, characterized in that, The steps are as follows: Excavate a foundation pit at the construction site and level the bottom of the pit. Concrete cushion layer is built at the bottom of the foundation pit (11). Install base blocks (22) at preset positions on the surface of concrete cushion layer (11), and connect adjacent base blocks (22) through base connecting beams (23) to complete the construction of base system (2); Install the support leg system (3) so that one end of the support rod (31) is connected to the base system (2); Install the base ring system (4) and fix the base ring body (41) and the support rod (31) at the end away from the base system (2); Install the tensioning system (5) to fix one end of the prestressed cable (51) to the foundation ring (41) and the other end to the base system (2); Backfill and compact the foundation pit.

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