Multi-layer reinforcing support structure for formwork within a fan foundation
Patent Information
- Application Number
- CN202522557935.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-12-02
AI Technical Summary
现有风机基础内模板支撑结构在底部支撑设计上，通常采用单一钢筋或钢管直接立设固定，部分虽配套设置止水部件（如普通橡胶圈），但仅将止水部件简单套设在支撑结构外侧，未通过辅助定位结构对止水部件进行限位加固
通过钢筋支撑、钢板与短钢筋，带动遇水膨胀橡胶止水环紧密贴合钢筋支撑，实现了主体底座底部防水密封、防止渗水的有益效果；通过支撑钢管、连接钢管与扫地杆，带动扣件紧固各钢管节点，实现了架体支撑稳固、承载力均匀传递的有益效果；通过竖向剪刀撑与旋转扣件，带动剪刀撑与支撑钢管每步连接，实现了架体抗侧移能力提升、避免变形的有益效果；通过可调托撑的螺杆、支托板与螺母，带动支托板调整至同一水平面，实现了模板支撑高度精准、保障模板平整度的有益效果；通过钢模板主体、连接槽、加固筋、连接筋、斜面支撑板与密封结构，带动连接长板、连接模板、隔板及钢筋立杆协同，实现了模板拼接精准、浇筑层成型质量稳定的有益效果。
Smart Images
Figure CN224884767U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of internal formwork for wind turbine foundations, specifically a multi-layer reinforced support structure for internal formwork of wind turbine foundations. Background Technology
[0002] This utility model relates to the field of wind turbine foundation construction technology, specifically to a multi-layer reinforced support structure for the internal formwork of wind turbine foundations. It is mainly applied to the concrete pouring construction of wind turbine foundations in onshore and offshore wind power projects. In wind power engineering construction, the wind turbine foundation, as the core load-bearing structure supporting the main equipment of the wind turbine, requires an internal formwork support structure to ensure the positioning and stability of the pouring mold. This ensures that the foundation shape conforms to the design precision after concrete pouring. Its bottom waterproofing performance and structural sealing directly affect the long-term operational safety of the wind turbine and the durability of the foundation structure. In existing wind turbine foundation internal formwork support structures, the bottom support design typically uses a single steel bar or pipe directly erected and fixed. While some may include water-stop components (such as ordinary rubber rings), these are simply fitted over the outside of the support structure without any auxiliary positioning or reinforcement. During actual construction, this type of existing structure lacks a tight fit between the water-stop components and the support structure, and the absence of positioning and reinforcement at the bottom of the support makes the water-stop components prone to displacement due to construction collisions or concrete pouring impacts. This creates gaps in the fit, leading to water seepage at the foundation bottom. Water seepage penetrates the foundation, reducing the strength and durability of the concrete, shortening the service life of the wind turbine foundation, and potentially causing cracks in the foundation structure, posing a threat to the safe operation of the wind turbine. Utility Model Content
[0003] The purpose of this utility model is to provide a multi-layer reinforced support structure for the internal template of a wind turbine foundation.
[0004] The objective of this utility model is achieved through the following technical solution: A multi-layer reinforced support structure for wind turbine foundation internal formwork includes a main base, a main support ring at the top of the main base, a wire mesh inside the main base, hollow columns inside the wire mesh, multiple connecting steel pipes outside the hollow columns, multiple supporting steel pipes inside the wire mesh, and multiple connecting long plates inside the main support ring. The adjacent ends of the multiple connecting long plates are fixedly connected to the outside of some of the supporting steel pipes. The multiple supporting steel pipes are connected by fasteners, and the connection between some of the supporting steel pipes and the connecting steel pipes is also fixed by fasteners. The main support ring constitutes a casting mechanism.
[0005] As a further description of the above technical solution: The casting mechanism includes multiple connecting templates, with partitions on the outside of the connecting templates, a casting layer in the groove formed between the connecting templates and the partitions, and steel bars inside the casting layer. One of the connecting templates has a supporting plate on the outside. As a further description of the above technical solution: The main support ring is composed of multiple steel template bodies. The interior of each steel template body is provided with multiple reinforcing ribs, multiple connecting ribs, multiple inclined support plates, and multiple connecting grooves. As a further description of the above technical solution: The connecting groove is used for connecting the main bodies of the steel formwork, and a sealing structure is provided at the joints of the main bodies of the steel formwork; the reinforcing ribs are connected to the main bodies of the steel formwork by welding, and the welds are free from defects such as incomplete welding, weld penetration, and cracks. As a further description of the above technical solution: The main body base is provided with steel reinforcement support, the bottom of the steel reinforcement support is provided with a steel plate, and short steel bars are provided above the steel plate; a water-swellable rubber waterstop ring is installed in the middle of the steel reinforcement support, and the inner diameter of the waterstop ring is tightly fitted with the steel reinforcement support. As a further description of the above technical solution: The frame structure, which is made of supporting steel pipes, is equipped with longitudinal and transverse ground-level bracing bars, which are fastened to the supporting steel pipes by fasteners. As a further description of the above technical solution: The frame, which is made of supporting steel pipes, is continuously equipped with vertical scissor bracing around its outer perimeter and inside. Each step of the scissor bracing is fixed to the supporting steel pipes by a swivel coupler. As a further description of the above technical solution: The top of the supporting steel pipe is provided with an adjustable support, which includes a screw and a support plate. The screw and the support plate are welded and fixed, and the screw and the nut are screwed together. The adjustable support has a preset compressive bearing capacity.
[0006] Compared with the prior art, the advantages of this utility model are: By using steel reinforcement supports, steel plates, and short steel bars, the water-swellable rubber sealing rings are tightly fitted to the steel reinforcement supports, achieving the beneficial effect of waterproof sealing at the bottom of the main base and preventing water seepage. By using supporting steel pipes, connecting steel pipes, and sweeping rods, the fasteners are tightened at each steel pipe node, achieving the beneficial effect of stable frame support and uniform load distribution. By using vertical scissor braces and swivel fasteners, the scissor braces are connected to the supporting steel pipes at each step, achieving the beneficial effect of improving the frame's resistance to lateral displacement and preventing deformation. By using adjustable support screws, support plates, and nuts, the support plates are adjusted to the same horizontal plane, achieving the beneficial effect of accurate formwork support height and ensuring the flatness of the formwork. By using the main body of the steel formwork, connecting grooves, reinforcing bars, connecting bars, inclined support plates, and sealing structures, the connecting long plates, connecting formwork, partitions, and steel reinforcement uprights work together, achieving the beneficial effect of accurate formwork splicing and stable casting layer forming quality. Attached Figure Description
[0007] Figure 1 This is a schematic diagram of the main body of an embodiment of the multi-layer reinforcement support structure for the inner template of the wind turbine foundation of this utility model; Figure 2 This is a schematic diagram of the connecting long plate of the multi-layer reinforced support structure for the inner formwork of the wind turbine foundation proposed in this utility model; Figure 3 This is a structural diagram of the connecting template of the multi-layer reinforced support structure for the wind turbine foundation internal template proposed in this utility model; Figure 4 This is a schematic diagram of the reinforcing bars of the multi-layer reinforcement support structure for the internal formwork of the wind turbine foundation proposed in this utility model.
[0008] Labeling Explanation: 1. Main Base; 2. Main Support Ring; 3. Hollow Column; 4. Wire Mesh; 5. Supporting Steel Pipe; 6. Connecting Steel Pipe; 7. Connecting Long Plate; 8. Supporting Long Plate; 9. Partition; 10. Pouring Layer; 11. Reinforcing Steel Upright; 12. Connecting Formwork; 13. Main Steel Formwork; 14. Reinforcing Bar; 15. Connecting Bar; 16. Sloping Support Plate; 17. Connecting Groove. Detailed Implementation
[0009] The present invention will now be described in detail with reference to the accompanying drawings and embodiments: like Figure 1 and 4The diagram shown is an embodiment of the multi-layer reinforced support structure for the internal formwork of a wind turbine foundation provided by this utility model. It includes a main base 1, which serves as the bottom bearing foundation of the overall structure, providing an installation foundation and bearing platform for the upper main support ring 2, hollow columns 3, wire mesh 4, and other structures. It transfers the load of the upper structure to the lower steel reinforcement support, while simultaneously limiting the installation position of each internal structure to ensure the overall structural installation accuracy. The main features are: a main support ring 2 is provided at the top of the main base 1; wire mesh 4 is installed inside the main base 1, laid inside the main base 1 and wrapping the outside of the hollow columns 3, providing auxiliary positioning and protection for the internal support steel pipes 5, limiting the horizontal displacement range of the support steel pipes 5, and preventing debris from entering the main support steel pipes during concrete pouring. The internal gaps of the base 1 ensure the cleanliness of the internal structure and the stability of the support. Hollow columns 3 are set inside the wire mesh 4, which serve as the central vertical components of the overall support structure. They provide installation support for the connecting steel pipes 6, locate the internal boundary of the wire mesh 4, and prevent the wire mesh 4 from shrinking or deforming during construction. This ensures the complete coverage of the internal area of the base 1 by the wire mesh 4. Multiple connecting steel pipes 6 are set outside the hollow columns 3. They are horizontally erected outside the hollow columns 3 and cooperate with the supporting steel pipes 5 to connect the dispersed supporting steel pipes 5 into an overall frame. This enhances the lateral integrity and stability of the frame and prevents individual supporting steel pipes 5 from tilting or shifting under independent force. At the same time, it transmits lateral loads, making the force on the frame more even.
[0010] Multiple supporting steel pipes 5 are vertically installed inside the wire mesh 4, serving as the main vertical load-bearing components of the overall frame. They bear the loads transferred from the adjustable upper supports, the main support ring 2, and the concrete pouring, providing core vertical support to prevent collapse or excessive deformation during construction. The frame structure composed of the supporting steel pipes 5 is equipped with longitudinal and transverse ground-level bracing, laid along the bottom of the frame, connecting all the bottom supporting steel pipes 5 to form a transverse constraint structure at the bottom of the frame. This restricts the horizontal displacement of the bottom supporting steel pipes 5, enhances the overall stability of the frame bottom, and prevents overall displacement due to the dispersed distribution of the bottom supporting steel pipes 5. It also distributes the bottom load. The ground-level bracing is fastened to the supporting steel pipes 5 with fasteners, connecting adjacent supporting steel pipes 5, connecting steel pipes 6 to supporting steel pipes 5, and connecting the ground-level bracing to supporting steel pipes 5, enabling detachable connections of each steel pipe component. The steel pipe joints are securely connected, transferring loads between the steel pipes. They also facilitate adjustment of the pipe positions during construction and subsequent dismantling, improving construction convenience. Vertical scissor bracing is continuously arranged around the perimeter and inside the frame formed by the supporting steel pipes 5, creating a diagonal support structure that enhances the frame's resistance to lateral displacement and overall rigidity. This prevents lateral deformation or collapse under horizontal loads such as concrete pouring lateral pressure and construction collisions, ensuring the frame's horizontal stability. Each step of the scissor bracing is fixed to the supporting steel pipe 5 using swivel couplers, ensuring a tight connection between the vertical scissor bracing and the supporting steel pipe 5. This transfers horizontal and shear forces between the vertical scissor bracing and the supporting steel pipe 5, ensuring the effective reinforcement of the frame against lateral displacement and preventing reinforcement failure due to loose connections.
[0011] Multiple connecting plates 7 are installed inside the main support ring 2 and cooperate with the support steel pipe 5 to connect the main support ring 2 and the support steel pipe 5. This transfers the load borne by the main support ring 2 to the support steel pipe 5, providing stable vertical support for the main support ring 2 and preventing displacement or deformation of the main support ring 2 under the lateral pressure of concrete. The near ends of the multiple connecting plates 7 are fixedly connected to the outside of part of the support steel pipe 5. An adjustable support is installed at the top of the support steel pipe 5. The adjustable support includes a screw and a support plate. As the core adjustment component of the adjustable support, the height of the support plate can be adjusted by rotation. The vertical position of the support plate can be precisely adjusted according to the installation height requirements of the formwork, ensuring that the support plate is in close contact with the upper formwork, ensuring that the formwork support height meets the design requirements, and improving installation accuracy. The support plate is located at the top of the adjustable support and contacts the upper formwork, increasing the contact area between the adjustable support and the formwork, and evenly transferring the load borne by the adjustable support to the formwork, preventing the formwork from deforming due to excessive local pressure.
[0012] Simultaneously, it provides vertical support for the template, ensuring its stable shape. The screw rod is welded and fixed to the support plate, and the screw rod is screwed and connected to the nut. The position is adjusted by rotating and locking the screw rod, fixing the height of the support plate and preventing it from sinking or shifting in height under load. This ensures the stability of the adjustable support height and avoids affecting the template installation accuracy and concrete pouring quality due to changes in the support plate height. The adjustable support has a preset compressive bearing capacity. Multiple support steel pipes 5 are connected and fixed with fasteners, and some support steel pipes 5 are connected to connecting steel pipes 6 with fasteners.
[0013] The main support ring 2 is composed of a pouring mechanism, which includes multiple connecting templates 12. As a component of the pouring mechanism, it cooperates with the partition plate 9 to form the forming space of the pouring layer 10, limiting the thickness and range of the concrete pouring layer 10, providing lateral support for the pouring layer 10, preventing the concrete pouring layer 10 from overflowing or deforming during pouring, and ensuring the dimensional accuracy of the pouring layer 10. The partition plate 9 is set outside the connecting template 12. It is set outside the connecting template 12 and together with the connecting template 12, it forms the empty groove structure of the pouring layer 10, providing another forming boundary for the pouring layer 10, and at the same time providing lateral support for the connecting template 12, enhancing the lateral displacement resistance of the connecting template 12, preventing the connecting template 12 from tilting due to the lateral pressure of the concrete, and ensuring the width accuracy of the pouring layer 10.
[0014] A pouring layer 10 is installed within the groove formed between the connecting template 12 and the partition plate 9. This groove serves as the core area for concrete pouring, bearing the concrete and allowing it to harden and solidify within the groove, ultimately forming the concrete structural layer of the wind turbine foundation. Its forming quality directly determines the strength and durability of the wind turbine foundation structure, ensuring that the foundation meets design requirements. Reinforcing bars 11 are installed inside the pouring layer 10, acting as reinforcement components to enhance the tensile strength of the concrete. To enhance the strength and overall structural integrity of the pouring layer 10, and prevent cracks from forming due to stress during concrete hardening or use, the structural bearing capacity and durability of the pouring layer 10 are improved, extending the service life of the wind turbine foundation. One of the connecting templates 12 is equipped with a supporting long plate 8 on its exterior, which provides additional lateral support to the connecting template 12, enhances its resistance to lateral displacement and deformation, prevents the connecting template 12 from bending or displacing under the lateral pressure of concrete pouring, ensures the stability of the connecting template 12, and thus ensures the forming quality of the pouring layer 10.
[0015] The main support ring 2 is composed of multiple steel formwork bodies 13. As a component of the main support ring 2, it forms the main forming panel of the inner formwork, providing forming boundaries for concrete pouring, defining the concrete pouring shape, ensuring that the inner contour of the wind turbine foundation conforms to the design after pouring, and bearing the lateral pressure of the concrete to prevent concrete overflow or deformation. Multiple reinforcing ribs 14 are set inside the steel formwork body 13. They serve as reinforcing components of the steel formwork body 13, enhancing the overall rigidity and deformation resistance of the steel formwork body 13, preventing the steel formwork body 13 from bending or bulging when bearing the lateral pressure of the concrete, ensuring the forming accuracy of the steel formwork body 13, and extending its service life.
[0016] Multiple connecting ribs 15 are installed inside the steel formwork body 13, connecting the internal reinforcing ribs 14 of the steel formwork body 13 with other components, enhancing the overall structural integrity of the steel formwork body 13, distributing the load borne by the steel formwork body 13 to the reinforcing ribs 14, preventing excessive local stress and damage to the steel formwork body 13, and improving crack resistance. Multiple inclined support plates 16 are installed inside the steel formwork body 13, positioned on the inclined surfaces, providing support for the inclined sections of the steel formwork body 13, enhancing the structural strength and stability of the inclined sections, preventing deformation or collapse of the inclined surfaces due to uneven stress, ensuring the accuracy of the inclined surface forming, and guaranteeing the quality of the concrete inclined surface pouring. Multiple connecting grooves are also provided inside the steel formwork body 13. 17, located inside the main body of the steel formwork 13, provides a connection interface for splicing multiple main bodies of the steel formwork 13, facilitating precise docking of the main bodies of the steel formwork 13, ensuring overall flatness and sealing after splicing, preventing concrete leakage due to misalignment, and improving the splicing accuracy of the formwork. The connecting groove 17 is used for connecting the main bodies of the steel formwork 13. A sealing structure is set at the joint of the main bodies of the steel formwork 13, which fills the splicing gap and blocks the channel for cement slurry to seep along the joint during concrete pouring, preventing quality defects such as honeycomb and pitting on the concrete surface due to leakage, enhancing the sealing of the formwork joint, and improving the surface quality of the concrete pouring. The reinforcing bar 14 is connected to the main body of the steel formwork 13 by welding, and the weld is free of defects such as incomplete welding, weld penetration, and cracks. The main base 1 is supported by steel bars, which serve as the core vertical support component under the main base 1. They bear the loads transmitted by the main base 1 and all the structures above it, provide stable vertical support for the main base 1, and prevent the main base 1 from sinking, tilting or displacing due to load during construction and concrete pouring, thus ensuring the vertical stability of the overall structure.
[0017] A steel plate is installed at the bottom of the reinforcing bar support to increase the stress area of the contact surface between the reinforcing bar support and the foundation. This evenly distributes the concentrated load borne by the reinforcing bar support to the bottom surface of the foundation, preventing the reinforcing bar support from sinking into the foundation due to excessive local pressure. At the same time, it also plays a positioning role for the bottom of the reinforcing bar support, preventing it from shifting. Short reinforcing bars are installed above the steel plate to assist in positioning and reinforcing the reinforcing bar support, limiting the horizontal displacement of the reinforcing bar support, enhancing the structural stability of the connection between the reinforcing bar support and the steel plate, and preventing the reinforcing bar support from shifting horizontally under construction collisions or loads, ensuring the vertical state of the reinforcing bar support. A water-swellable rubber waterstop ring is installed in the middle of the reinforcing bar support. It expands upon contact with water, filling the gap between the reinforcing bar support and the surrounding concrete, and fits tightly with the reinforcing bar support. This effectively blocks the channel for water to seep through along the contact surface between the reinforcing bar support and the concrete, achieving a waterproof seal at the bottom of the main base 1 and preventing water seepage at the bottom of the foundation. The inner diameter of the waterstop ring fits tightly with the reinforcing bar support.
[0018] Working Principle: Before construction, the structural quality of the main steel formwork 13, supporting steel pipes 5, fasteners, etc., needs to be checked. Debris in the work area should be cleared, and the installation positioning lines of the main base 1 and hollow columns 3 should be marked according to the benchmark requirements. Wrenches, hoisting tools, and sealing materials should be prepared. Reinforcing steel supports are installed at the preset positions below the main base 1. Steel plates are placed at the bottom of the reinforcing steel supports, and short reinforcing bars are installed above the steel plates. Water-swellable rubber waterstop rings are fitted in the middle of the reinforcing steel supports, ensuring that the waterstop rings fit snugly against the reinforcing steel supports. Hollow columns 3 are hoisted to their internal positioning positions within the main base 1 and temporarily fixed. Wire mesh 4 is cut and laid inside the main base 1, covering the internal area and wrapping the outside of the hollow columns 3. Supporting steel pipes 5 are vertically erected at designated points inside the wire mesh 4 at intervals, and adjacent supporting steel pipes 5 are connected with fasteners. Connecting steel pipes 6 are horizontally placed outside the hollow columns 3, and the connecting steel pipes 6 and supporting steel pipes 5 are fixed with fasteners. Simultaneously, sweeping rods are laid along the longitudinal and transverse directions at the bottom of the frame, and the sweeping rods are fixed to the supporting steel pipes 5 with fasteners.
[0019] Vertical scissor bracing is continuously installed at intervals around the outside and inside of the supporting steel pipe 5 frame. After adjusting the angle, the scissor bracing is fixed to the supporting steel pipe 5 with swivel couplers to ensure that each scissor bracing is firmly connected. Check the weld between the screw of the adjustable support and the support plate, install it at the top of the supporting steel pipe 5, and adjust the height of the support plate to the preset value by rotating the nut. Use a level to ensure that all support plates are on the same horizontal plane. Hoist multiple steel formwork bodies 13 to the top positioning area of the main body base 1, and splice the steel formwork bodies 13 through the connecting groove 17. Install reinforcing ribs 14, connecting ribs 15 and inclined support plates 16 inside, and install a sealing structure at the joints.
[0020] Hoist the connecting plate 7 into the main support ring 2, adjust its position so that one end of the connecting plate 7 is close to the designated area outside the supporting steel pipe 5 and fix it. Install the connecting template 12 to the preset position, install partition plates 9 on its outside to form a hollow groove, arrange the pouring layer 10 components in the hollow groove, install the steel reinforcement uprights 11 in the preset position inside the pouring layer 10, and install the supporting plate 8 on the outside of one connecting template 12. Check the splicing accuracy of the steel template body 13, the position of the connecting template 12, the height of the adjustable support, etc. If misalignment or deviation is found, it is corrected by adjusting the position of the fasteners and rotating the adjustable support nuts.
[0021] Concrete is poured into the pouring layer 10, proceeding from lower to higher elevations. A designated person monitors the stress on the connecting formwork 12 and supporting steel pipes 5, correcting any slight displacement with temporary supports until the concrete is fully poured. After pouring, the concrete is covered with moisture-retaining material and regularly watered according to environmental conditions, controlling the curing temperature to ensure the concrete hardens to its design strength. Once the concrete reaches the required strength, the following components are removed in sequence: supporting long plate 8, connecting formwork 12, partition plate 9, connecting long plate 7, main steel formwork 13 and its internal components, adjustable supports, scissor braces, connecting steel pipes 6, supporting steel pipes 5, wire mesh 4, and hollow columns 3. Finally, construction debris is removed.
Claims
1. A multi-layer reinforced support structure for the inner formwork of a wind turbine foundation, comprising a main base (1), characterized in that: The main support ring (2) is provided at the top of the main base (1). The main base (1) is provided with wire mesh (4). The wire mesh (4) is provided with hollow column (3). The hollow column (3) is provided with multiple connecting steel pipes (6) on the outside. The wire mesh (4) is provided with multiple supporting steel pipes (5). The main support ring (2) is provided with multiple connecting long plates (7). The near ends of the multiple connecting long plates (7) are fixedly connected to the outside of some supporting steel pipes (5). The connection of the multiple supporting steel pipes (5) is fixed by fasteners. The connection between some supporting steel pipes (5) and connecting steel pipes (6) is fixed by fasteners. The main support ring (2) is composed of a casting mechanism.
2. The multi-layer reinforced support structure for the inner formwork of the wind turbine foundation according to claim 1, characterized in that: The casting mechanism includes multiple connecting templates (12), with partitions (9) provided on the outside of the connecting templates (12), and a casting layer (10) provided in the groove formed between the connecting templates (12) and the partitions (9). Reinforcing bars (11) are provided inside the casting layer (10), and a supporting plate (8) is provided on the outside of one of the connecting templates (12).
3. The multi-layer reinforced support structure for the internal formwork of the wind turbine foundation according to claim 1, characterized in that: The main support ring (2) is composed of multiple steel template bodies (13). Multiple reinforcing ribs (14) are provided inside the steel template body (13). Multiple connecting ribs (15) are provided inside the steel template body (13). Multiple inclined support plates (16) are provided inside the steel template body (13). Multiple connecting grooves (17) are opened inside the steel template body (13).
4. The multi-layer reinforced support structure for the inner formwork of the wind turbine foundation according to claim 3, characterized in that: The connecting groove (17) is used for the connection between the steel template bodies (13). The joint of the steel template body (13) is provided with a sealing structure. The reinforcing bar (14) is connected to the steel template body (13) by welding. The weld has no defects such as missing weld, weld penetration, or cracks.
5. The multi-layer reinforced support structure for the internal formwork of the wind turbine foundation according to claim 1, characterized in that: The main base (1) is provided with a steel bar support below it. A steel plate is provided at the bottom of the steel bar support. Short steel bars are provided above the steel plate. A water-swellable rubber waterstop ring is installed in the middle of the steel bar support. The inner diameter of the waterstop ring is tightly fitted with the steel bar support.
6. The multi-layer reinforced support structure for the inner formwork of the wind turbine foundation according to claim 1, characterized in that: The frame structure formed by the supporting steel pipe (5) is equipped with longitudinal and transverse sweeping bars, which are fastened to the supporting steel pipe (5) by fasteners.
7. The multi-layer reinforced support structure for the inner formwork of the wind turbine foundation according to claim 1, characterized in that: The frame structure formed by the supporting steel pipe (5) is continuously provided with vertical scissor bracing around its outer perimeter and inside. Each step of the scissor bracing is fixed to the supporting steel pipe (5) by a swivel fastener.
8. The multi-layer reinforced support structure for the internal formwork of the wind turbine foundation according to claim 1, characterized in that: The top end of the supporting steel pipe (5) is provided with an adjustable support, which includes a screw and a support plate. The screw and the support plate are welded and fixed, and the screw and the nut are screwed together. The adjustable support has a preset compressive bearing capacity.