Bridge and tower integrated canyon type wind power generation system

Abstract

The invention relates to the technical field of wind power generation and bridge structure engineering, and discloses a bridge and tower integrated canyon type wind power generation system. The system comprises two oppositely-distributed natural mountains, a suspension bridge structure arranged between the two mountains in a spanning mode and a wind tower arranged in a canyon. And the middle part or the upper part of the wind tower is fixedly connected with the suspension bridge structure through the structural rigid connection node, so that the wind tower and the suspension bridge form a bridge-tower integrated stress system. Transverse loads generated by the wind tower under the action of wind loads are transmitted to the suspension bridge main cable through the connecting nodes and transmitted to the natural mountains on the two sides through the anchoring structures, so that the bending moment of the tower footing is shared, and the structural stability is improved. The system is provided with a pressure sensor which is linked with a variable pitch control system, so that active safety control is realized. The terrain condition of the canyon and the horizontal bearing capacity of the suspension bridge are fully utilized, the high-altitude wind energy utilization efficiency is improved, and the problem that wind power is difficult to solve at present is solved.

Description

Technical Field

[0001] This invention relates to the fields of wind power generation and bridge structure engineering technology, and in particular to a bridge-tower integrated canyon wind power generation system. Background Technology

[0002] Wind power generation technology, as an important way to utilize renewable energy, has been widely applied in different regions such as plains, hills, mountains, and offshore. Based on different deployment environments and terrain conditions, existing wind power generation systems can be broadly divided into two categories: wide-area wind power generation and narrow-area wind power generation.

[0003] Wide-area wind power generation is typically deployed in open areas such as flat land, slopes, ridges, tidal flats, or sea surfaces. Most wind turbines are supported by independent towers, meaning the turbine is mounted on top of a tower, with the tower and its foundation solely bearing the turbine's weight, operating loads, and the bending moments and shear forces generated by wind loads. While this structural form is relatively mature in engineering applications, the increasing tower height and unit capacity have led to increasingly prominent problems, including a single stress distribution, concentrated bending moments at the tower foundation, and increased difficulty in construction and installation. Especially as turbine installation heights further increase, the tower is often in a cantilevered state with a single column, lacking effective external lateral support, which significantly impacts tower stability, foundation size, material consumption, and operation and maintenance costs.

[0004] Furthermore, existing large-scale independent tower wind power systems typically rely on large external hoisting equipment to install the towers, nacelles, and blades, requiring sophisticated site conditions and lifting capacity for their construction organization. In complex terrain conditions, the feasibility of constructing ultra-high towers and the convenience of equipment operation and maintenance are both limited. Additionally, these systems primarily employ a centralized arrangement at the top of the turbines, limiting their ability to utilize advantageous wind energy resources at different heights under complex wind farm conditions.

[0005] For confined spaces or challenging mountainous and canyon environments, several existing wind power generation layouts exist. For example, some solutions employ suspended wind turbine structures, using flexible suspension components to support the wind power generation device. While this type of structure is adaptable to confined spaces to some extent, its load-bearing system is highly flexible, making it prone to vibration, flutter, and fatigue responses under continuous wind loads, pulsating winds, or complex wind fields. This negatively impacts the system's operational safety and long-term stability.

[0006] Other solutions employ a method of constructing structures across mountains or bridging mountains, setting up a transverse steel structure support system between the high-altitude terrain on both sides, and then mounting wind power generation devices on it. This type of solution attempts to utilize the elevation difference between canyons or mountains to obtain high-altitude wind energy. However, when the height of the supporting structures on both sides is large, the transverse span is long, and the size of the wind turbine rotors further increases, the transverse frame often faces challenges such as difficulties in constructing ultra-high and ultra-long components, complex aerial assembly, high requirements for overall stability, and insufficient resistance to short-term strong winds. Especially when there is a lack of intermediate column support, the large-span transverse steel structure itself needs to withstand a large bending moment, significantly increasing the difficulty of engineering implementation and operational safety risks.

[0007] In complex terrain areas such as mountains or valleys where mountains stand opposite each other, high-altitude wind speeds are typically high and wind direction is relatively concentrated, providing favorable conditions for wind energy development. Simultaneously, the natural spatial opposition between the two mountains objectively possesses the potential to provide lateral support and load transfer for elevated structures. However, existing wind power systems, whether using independent towers over vast areas or suspended or cross-mountain structures in narrow regions, have failed to effectively construct a spatially coordinated force-bearing system that can utilize the support conditions of the mountains on both sides while also considering construction and hoisting, structural stability, and operational safety.

[0008] On the other hand, in the field of bridge engineering, suspension bridge structures, through the main cable, bridge deck structure, and anchorage systems on both sides, constitute a mature large-span load-bearing system with strong horizontal load-bearing capacity and good conditions for high-altitude hoisting platforms. In existing technologies, the tensile characteristics of the main cable and the anchorage capacity of the mountains on both sides of the suspension bridge are mainly used to bear the bridge's own weight and traffic loads, and have not yet been effectively incorporated into wind power generation systems to form a load-bearing path that distributes the lateral load of the wind tower to the mountains on both sides.

[0009] Therefore, for complex canyon or mountainous environments, there is an urgent need to propose a new wind power generation structure system that can make full use of the spatial conditions between the natural mountains on both sides and the horizontal bearing capacity, hoisting support and anchoring force transmission capacity of the suspension bridge structure. This would transform the wind tower from the traditional single-column cantilever force-bearing form to a spatially coordinated force-bearing form with lateral constraints, thereby reducing the tower foundation bending moment, improving structural stability, improving construction and installation conditions, and enhancing the efficiency of developing and utilizing high-altitude advantageous wind energy resources. Summary of the Invention

[0010] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a bridge-tower integrated canyon wind power generation system to solve the problems of concentrated stress, excessive bending moment of the tower base, difficulty in fully utilizing the support conditions of the mountains on both sides of the canyon, and limited utilization efficiency of high-altitude wind energy resources in the existing independent tower structure.

[0011] To achieve the above objectives, this invention constructs a rigid connection system between the wind tower and the suspension bridge structure, enabling the lateral load generated by the wind tower under wind load to be transferred to the natural mountains on both sides through the main cable of the suspension bridge, thereby forming a spatially coordinated force-bearing structure system integrating the bridge and the tower.

[0012] To achieve the above objectives, the present invention provides the following technical solution: In one embodiment of the present invention, a bridge-tower integrated canyon wind power generation system is provided, comprising two relatively distributed natural mountains, with a canyon space formed between the two natural mountains.

[0013] In one embodiment of the present invention, a suspension bridge structure is constructed between the two natural mountains. The suspension bridge structure includes a main cable, a bridge deck structure, and anchorage structures respectively disposed within the two natural mountains. Both ends of the main cable are respectively anchored within the anchorage structures.

[0014] In one embodiment of the present invention, at least one wind tower is provided in the canyon, and the foundation of the wind tower is provided at the bottom of the canyon or on the mountain.

[0015] Furthermore, at least one wind turbine generator is installed on the windward side of the wind tower.

[0016] In one embodiment of the present invention, the top of the wind tower is connected to the suspension bridge structure through a structural connection node capable of transmitting bending moment and shear force, so that the wind tower and the suspension bridge structure form a cooperative force-bearing structural system integrating the bridge and tower.

[0017] Furthermore, the structural connection node constitutes a force transmission channel between the wind tower and the main cable. When the wind tower generates a lateral load under wind load, the lateral load is transmitted to the main cable through the structural connection node, causing the main cable to generate axial tension, which is then transmitted to the two natural mountains through the anchoring structure, thereby sharing the bending moment borne by the wind tower foundation.

[0018] Furthermore, the suspension bridge structure is arranged along the main lateral force direction of the wind tower, so that the main cable of the suspension bridge structure constrains the wind tower in the lateral direction, thereby providing lateral support for the wind tower and its upper wind turbine generator.

[0019] In one embodiment of the present invention, a pressure sensor is installed between the wind tower and the suspension bridge structure. The pressure sensor is electrically connected to the pitch control system of the wind turbine generator set and is used to adjust the working angle of the wind turbine generator set blades according to the detected stress state, so as to realize the linkage control between the stress state of the structure and the operating state of the wind turbine.

[0020] Furthermore, the top height of the wind tower is level with or higher than the height of the suspension bridge deck, so as to form a lateral support structure of similar height.

[0021] In one embodiment of the present invention, the structural connection node includes an annular reinforcing structure disposed on the outer periphery of the wind tower, and a transverse connecting beam extending from the annular reinforcing structure toward the suspension bridge direction. The transverse connecting beam is connected to the suspension bridge structure to form a structural connection relationship capable of transmitting bending moment and shear force.

[0022] Preferably, the transverse connecting beam is fixedly connected to the suspension bridge structure by high-strength bolts, welding, or a combination of bolting and welding.

[0023] In one embodiment of the present invention, a damping structure is provided between the wind tower and the suspension bridge structure to reduce the vibration response of the integrated bridge tower structure under wind load.

[0024] Preferably, the damping structure is at least one of a hydraulic damper, a viscous damper, a friction damping device, or a tuned mass damper.

[0025] Optionally, the wind turbine generator set is installed on the side of the wind tower on the windward side.

[0026] Optionally, the suspension bridge structure is used to hoist wind tower components and wind turbine generator parts during the construction of the wind tower.

[0027] In one embodiment of the present invention, a method for constructing a bridge-tower integrated canyon wind power generation system is also provided, comprising the following steps: S1 involves conducting wind resource assessment, topographic mapping, and engineering geological surveys between two relatively distributed natural mountains, and designing the system structure accordingly. S2 involves constructing a suspension bridge structure between two natural mountains, with the two ends of the main cable anchored to the two natural mountains respectively; S3, construct at least one wind tower foundation and install the wind tower body in the canyon; S4, build the wind tower at a position that is level with or higher than the bridge deck of the suspension bridge; S5 connects the wind tower to the suspension bridge structure through structural connection nodes that can transmit bending moment and shear force. S6, Install at least one wind turbine generator on the windward side of the wind tower; S7, a pressure sensor is installed between the wind tower and the suspension bridge structure and connected to the pitch control system of the wind turbine to adjust the blade angle of the wind turbine according to the stress state.

[0028] Furthermore, in step S2, the main cable anchorage chamber is formed in the natural mountain by a combination of manual excavation and gas fracturing technology.

[0029] Furthermore, in step S3, a hoisting platform is set up using the suspension bridge structure, and the wind tower components are hoisted by a combination of a fixed and movable pulley block installed on the suspension bridge and a winch.

[0030] Furthermore, in step S6, a support frame and a fixed and moving pulley block are set on the top of the wind tower, and the wind turbine generator set and blades are self-lifted and installed in conjunction with a winch.

[0031] Based on the above technical solution, the bridge-tower integrated canyon wind power generation system of the present invention constructs a suspension bridge structure between two natural mountains and connects the wind tower to the suspension bridge structure through a structural rigid connection node. This allows the lateral wind load on the wind tower to be transferred to the natural mountains on both sides via the main cable, thereby sharing the bending moment of the wind tower foundation. At the same time, the horizontal bearing capacity of the suspension bridge structure provides lateral support for the wind tower and wind turbine generator. Combined with pressure sensors and a pitch control system, active safety control is achieved. This solves the problems of concentrated bending moment, limited installation height, difficult construction in canyon areas, and insufficient structural safety of existing independent tower wind power structures, thereby improving the utilization efficiency of high-altitude wind energy and the overall safety of the system.

[0032] Furthermore, by constructing a spatial force transfer path of "wind tower - rigid connection node - suspension bridge main cable - mountain anchorage structure", the present invention transforms the traditional cantilever bending system of wind tower into a spatial collaborative force-bearing system with lateral elastic constraints. This means that the bending moment generated by the wind tower under wind load is no longer entirely borne by the tower base, but is instead distributed and transferred to the natural mountains on both sides through the tension of the main cable. This significantly reduces the peak bending moment of the tower base, optimizes the stress state of the tower body, and improves the overall stability from the structural system level.

[0033] Furthermore, since the main cable of the suspension bridge is laid out along the lateral force direction of the wind tower, it has strong horizontal bearing capacity and elastic deformation capacity. After the wind tower and the main cable form a rigid connection, it can effectively constrain and support the wind tower under wind load, thereby suppressing the displacement of the top of the wind tower and the structural vibration response, and improving the operational stability of the tall wind tower in the complex canyon wind field.

[0034] Furthermore, by installing pressure sensors between the wind tower and the suspension bridge and feeding back the detected force signals to the pitch control system of the wind turbine generator, the working angle of the wind turbine blades can be adjusted in real time. This allows the wind turbine to automatically reduce its wind-receiving area or adjust the direction of force under short-term strong winds or extreme wind conditions, thereby reducing the lateral load on the wind tower from the source, achieving a dynamic balance between structural safety and power generation efficiency, and improving the system's active safety control capabilities.

[0035] Furthermore, this invention fully utilizes the load-bearing and hoisting functions of the suspension bridge structure during the construction phase, providing platform support for the hoisting of wind tower components and wind turbine generator parts under complex canyon terrain conditions, avoiding the deployment of large lifting equipment at the bottom of the canyon, reducing construction difficulty and engineering risks, and improving construction safety and project feasibility.

[0036] Furthermore, this invention installs the wind turbine generator on the side of the wind tower facing the wind, placing the wind turbine in a high-altitude, high-efficiency wind energy region. While obtaining higher wind speeds and more stable wind direction conditions, it effectively solves the technical bottlenecks of traditional ultra-high towers in terms of structural stability and economy by utilizing the lateral support provided by the suspension bridge structure.

[0037] In summary, this invention achieves a comprehensive effect of structural system optimization, construction method innovation, and improved operational safety through integrated bridge-tower structural design, spatial force flow transfer mechanism, and active force control method. Under special terrain conditions such as canyons or mountains, it provides a technical solution for wind power generation systems that is structurally reasonable, safe and reliable, feasible to construct, and has high wind energy utilization efficiency. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of the bridge-tower integrated canyon wind power generation system of the present invention; Detailed Implementation

[0039] To make the technical solution of the present invention clearer and more complete, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments described are only used to illustrate the technical concept and implementation of the present invention, and do not constitute a limitation on the scope of protection of the present invention.

[0040] In the following specific embodiments, the same or corresponding components are represented by the same reference numerals. For ease of explanation, this embodiment will be described in layers according to structural composition, connection method, installation process, and force mechanism.

[0041] It should be understood that, where there is no conflict, the various embodiments and technical features described in this specification can be combined with each other. All equivalent substitutions or obvious structural modifications made based on the technical solutions of this invention should fall within the protection scope of this invention.

[0042] I. Overall Structure and Implementation Method To make the technical solution of the present invention clearer and more explicit, the following is in conjunction with... Figure 1 The overall structure of the bridge-tower integrated canyon wind power generation system of the present invention is described in detail.

[0043] like Figure 1As shown, the bridge-tower integrated canyon wind power generation system of the present invention is set between two oppositely distributed natural mountains, which are distributed opposite each other along the two sides of the canyon, forming a canyon space between them.

[0044] A suspension bridge structure is constructed spanning two natural mountains. The suspension bridge structure includes a main cable, a bridge deck structure, and anchorage structures respectively located inside the two natural mountains. Both ends of the main cable are anchored in corresponding anchorage structures, which are integrally and fixedly connected to the natural mountains to transfer the tensile force borne by the main cable to the mountain rock structure.

[0045] The main cable is laid laterally along the canyon, and its extension direction is basically consistent with the direction of the main lateral wind load on the wind tower.

[0046] At least one wind tower shall be installed within the canyon space. The foundation of the wind tower shall be located at the bottom of the canyon or on a mountain platform, and the foundation shall be fixedly connected to the ground or rock structure to bear the weight of the wind tower and part of the vertical load.

[0047] At least one wind turbine generator set is installed on the windward side of the wind tower. The wind turbine generator set includes a nacelle, a hub, and blades. The wind turbine generator set is installed at a high altitude on the side of the wind tower, placing it in a high-altitude wind energy region.

[0048] The middle or upper part of the wind tower is fixedly connected to the suspension bridge structure through a structural rigid connection node, so that the wind tower and the suspension bridge structure form an integrated bridge-tower load-bearing structural system.

[0049] Within this overall structure, the following spatial force paths are formed: When a wind turbine generates a lateral load under wind load, the lateral load first acts on the wind tower; the lateral load on the wind tower is transferred to the main cable in the suspension bridge structure through the structural rigid connection node; the main cable generates tension after being stressed, and the tension is transferred to the natural mountains on both sides through the anchoring structure.

[0050] As a result, the lateral bending moment on the wind tower is no longer entirely borne by the tower base, but is distributed to the natural mountains on both sides through the main cable, thus constructing a spatially coordinated force-bearing system among the wind tower, the suspension bridge structure, and the natural mountains.

[0051] Furthermore, the suspension bridge structure is arranged along the lateral force direction of the wind tower, which forms a lateral constraint on the wind tower under wind load, thereby providing external support conditions at the structural system level and improving the overall stability of the wind tower.

[0052] In this embodiment, the suspension bridge structure not only bears the self-weight of the bridge deck and the possible functions of maintenance and passage, but also participates in the stress as part of the lateral load transfer channel of the wind tower, realizing the coordinated work of the bridge structure and the wind tower structure.

[0053] Through the above-mentioned overall structural design, an integrated bridge-tower spatial structural system is formed between canyons or two mountains, transforming the traditional single-tower cantilever bending mode into a spatial force-bearing mode with lateral support, providing a structural foundation for the safe operation of tall wind towers under complex terrain conditions.

[0054] II. Implementation Method of Bridge Tower Connection Structure To further illustrate the connection method between the wind tower and the suspension bridge, the specific implementation method of the bridge tower connection structure will be described in detail below with reference to the figures.

[0055] As shown in the figure, the wind tower is rigidly connected to the suspension bridge structure through a structural rigid connection node. This structural rigid connection node constitutes the force transmission channel between the wind tower and the main cable, and is a key structural component of the integrated bridge-tower stress system.

[0056] 1. Basic structure of a rigid connection node In this embodiment, the structural rigid connection node includes: A ring-shaped reinforcing structure is installed on the outer periphery of the wind turbine; A transverse connecting beam extending from the ring-shaped reinforcing structure toward the suspension bridge structure.

[0057] The annular reinforcing structure is installed on the outer side of the wind turbine tower wall, forming an integral and fixed connection with the tower body. Preferably, the annular reinforcing structure can be a steel annular stiffening member, which is fixed to the wind turbine tower wall by welding or bolting.

[0058] One end of the transverse connecting beam is fixedly connected to the annular reinforcing structure, and the other end is rigidly connected to the suspension bridge structure.

[0059] The above structure enables a stable rigid force connection between the wind tower and the suspension bridge structure.

[0060] 2. Connection method between the transverse connecting beam and the suspension bridge structure The connection between the transverse connecting beam and the suspension bridge structure can be achieved in one of the following ways: High-strength bolt connection; Welded connection; Bolted and welded combination connection method.

[0061] In a preferred embodiment, the transverse connecting beam forms a rigid fixed connection with the bridge deck structure or the connecting components that are matched with the main cable in the suspension bridge structure, so that the transverse connecting beam can reliably transmit bending moment and shear force.

[0062] By using a rigid connection method, the lateral load on the wind tower can be effectively transferred to the suspension bridge structure, avoiding relative rotation or slippage at the connection point.

[0063] 3. Explanation of Force Transmission Path Under wind load, the wind turbine generator generates a lateral load, which first acts on the wind tower.

[0064] When the wind tower body undergoes bending deformation, the ring-shaped reinforcing structure acts as a node reinforcement component, diverting the local stress on the tower body to the transverse connecting beam.

[0065] The transverse connecting beam then transfers the transverse load and bending moment to the main cable in the suspension bridge structure.

[0066] After being subjected to force, the main cable generates tension, which is transmitted to the natural mountain through the anchoring structure, thus forming a continuous force flow path from wind tower 3 to rigid connection node, main cable, anchoring structure, and natural mountain.

[0067] Through the aforementioned force transfer mechanism, part of the lateral bending moment of the wind tower is borne by the main cable, reducing the peak bending moment borne by the tower foundation.

[0068] 4. Damping structure configuration In this embodiment, a damping structure can be installed between the wind tower and the suspension bridge structure to reduce the vibration response of the integrated bridge tower structure under wind load.

[0069] The damping structure can be installed between the transverse connecting beam and the suspension bridge structure, or between the wind tower and the bridge deck structure.

[0070] The damping structure can be: a hydraulic damper; a viscous damper; a friction damping device; or a tuned mass damper.

[0071] By setting up a damping structure, energy can be dissipated from structural vibrations during the process of bridge towers sharing the load, thereby improving overall operational stability.

[0072] 5. Pressure sensing and active control Pressure sensors are installed between the wind tower and the suspension bridge structure.

[0073] The pressure sensor is installed at or near the rigid connection node to detect the stress state between the wind tower and the suspension bridge structure in real time.

[0074] The pressure sensor is electrically connected to the pitch control system of the wind turbine generator. When the lateral load reaches a preset threshold, the pitch control system adjusts the working angle of the blades to reduce the wind-receiving area, thereby reducing the wind load on the wind tower.

[0075] The above structure enables linkage between structural stress monitoring and wind turbine control system, improving the safety of the integrated bridge-tower structure under complex wind field conditions.

[0076] III. Implementation Method of Fan Installation and Lifting Structure To further illustrate the installation feasibility and construction structural characteristics of this invention under complex canyon terrain conditions, the following is combined with... Figure 1 The specific implementation method of the wind turbine installation and hoisting structure is described.

[0077] In this embodiment, the suspension bridge structure not only serves as a lateral support structure for the wind tower during operation, but also functions as a hoisting platform during construction.

[0078] 1. Suspension Bridge Erection System Setup A fixed and movable pulley system is installed on the suspension bridge structure, and a winch is set up at the bottom of the mountain or canyon to form a hoisting system.

[0079] The fixed and movable pulley blocks can be installed on the bridge deck structure or a specially designed support frame, and connected to the winch via steel wire ropes. The winch is located on the natural hillsides on both sides or on the construction platform at the bottom of the canyon to provide lifting power.

[0080] During the construction phase, the fixed and moving pulley blocks, in conjunction with the winch, can be used to hoist the segmented components of the wind tower.

[0081] By utilizing the existing suspension bridge structure as an aerial work platform, it is possible to avoid deploying large hoisting equipment at the bottom of the canyon, thereby reducing construction difficulty and improving construction safety.

[0082] 2. Implementation Method for Hoisting Wind Tower Components In this embodiment, the tower components of the wind tower can be prefabricated in the factory and transported to the construction site in sections.

[0083] Using the hoisting system on the suspension bridge structure, the tower components are hoisted to their designed positions section by section and then spliced ​​and installed.

[0084] As the wind tower is gradually built to a position that is level with or slightly higher than the suspension bridge deck, a rigid connection between the wind tower and the suspension bridge structure is achieved through structural rigid connection nodes.

[0085] After the rigid connection is completed, the wind tower and the suspension bridge structure form an integrated structural system.

[0086] 3. Self-lifting method for wind turbine generator sets A support frame and a heavy-duty fixed and movable pulley block can be installed on the top of the wind tower.

[0087] The heavy-duty fixed-motion pulley block, together with the winch, forms a high-altitude lifting system for lifting wind turbine generators and their blades.

[0088] Specifically, the nacelle, hub, and blades of the wind turbine generator can be lifted to the predetermined installation position on the wind tower by the hoisting system.

[0089] The above method enables the installation of wind turbine generators on the side of the wind tower.

[0090] In this embodiment, the wind turbine generator is installed on the side of the wind tower on the windward side, so that the wind turbine is in a higher altitude and thus obtains wind energy resources with higher wind speeds.

[0091] 4. Coordination between hoisting and structure Through the above-mentioned hoisting structure, the suspension bridge structure can undertake the function of lifting wind tower components and wind turbine parts during the construction phase, and undertake the function of sharing the lateral load of the wind tower during the operation phase.

[0092] This enables the functional reuse of suspension bridge structures and improves the overall utilization efficiency of the structure.

[0093] Throughout the construction process, the rigid connection node between the suspension bridge structure and the wind tower serves as a key load-bearing node, and after construction is completed, it transitions to the operation phase to bear the lateral load of the wind tower.

[0094] This structural arrangement makes the invention feasible in complex canyon terrain conditions and avoids the problem of traditional large-tonnage ground hoisting equipment being limited by terrain.

[0095] IV. Construction Method and Implementation To further illustrate the construction process of the bridge-tower integrated canyon wind power generation system of this invention, the following is a detailed explanation. Figure 1 The construction method and implementation method are described in detail.

[0096] like Figure 1 As shown, the construction method of the present invention includes the following steps.

[0097] 1. Step S1: Preliminary Survey and Structural Design First, wind resource assessment, topographic mapping, and engineering geological surveys were conducted between two relatively distributed natural mountains.

[0098] Specifically, it includes: Wind measurement analysis was conducted in the canyon area to obtain wind speed data at different heights; Distance and elevation measurements were performed on both sides of the mountain. Geological surveys were conducted on the lithology and bearing capacity of the mountain.

[0099] Based on the above data, the structural design and stress analysis of the suspension bridge structure, wind tower and rigid connection nodes were completed, and the main cable layout, anchorage structure form and wind tower design height were determined.

[0100] 2. Step S2: Construction of the suspension bridge structure The main cable anchorage structure was constructed at selected locations on two natural mountains.

[0101] Preferably, a combination of manual excavation and gas fracturing technology can be used to form an anchoring chamber within the mountain, and anchoring components can be installed to form an integral load-bearing structure with the mountain rock mass.

[0102] After the anchoring structure is completed, the main cable is erected and the bridge deck structure is installed to form a suspension bridge structure.

[0103] Install fixed and movable pulley blocks and corresponding hoisting components on the suspension bridge structure to provide high-altitude hoisting conditions for the subsequent construction of wind towers.

[0104] 3. Step S3: Installation of wind turbine foundation and tower body Construct wind tower foundations at the bottom of the canyon or on a mountain platform, and fix them to the foundation or rock mass.

[0105] The components of the wind tower were prefabricated in sections and transported to the construction site.

[0106] The tower components are hoisted and installed section by section using fixed and movable pulley blocks and winches installed on the suspension bridge structure.

[0107] As the tower was gradually raised section by section, Wind Tower 3 gradually reached its designed height.

[0108] 4. Step S4: Rigid connection of bridge towers When the wind tower is built to a position that is level with or slightly higher than the suspension bridge deck, the wind tower is fixedly connected to the suspension bridge structure through structural rigid connection nodes.

[0109] Specifically, it includes: A ring-shaped reinforcing structure is installed around the outer perimeter of the wind turbine. Install transverse connecting beams; The transverse connecting beams are rigidly connected to the suspension bridge structure.

[0110] After the connection is completed, the wind tower and the suspension bridge structure will form an integrated load-bearing structure system.

[0111] 5. Step S5: Wind turbine generator installation Install a support frame and a heavy-duty fixed and moving pulley block on the top of the wind tower.

[0112] The wind turbine generator set and its components (including the nacelle, hub and blades) are lifted to the predetermined installation position using a winch and installed on the windward side of the wind tower.

[0113] Complete the mechanical installation and electrical connection of the wind turbine generator set.

[0114] 6. Step S6: Integration of the stress monitoring and control system Pressure sensors were installed between the wind tower and the suspension bridge structure.

[0115] The pressure sensor is electrically connected to the pitch control system of the wind turbine generator.

[0116] Through system debugging, the force signal detected by the pressure sensor can be fed back to the pitch control system to adjust the working angle of the blades.

[0117] 7. Step S7: Debugging and grid-connected operation After completing the structural connection and equipment installation, the integrated bridge-tower structure and wind turbine generator set were subjected to system commissioning.

[0118] After confirming that the structure is under normal stress and the control system is operating stably, grid connection and power generation are achieved.

[0119] During operation, the lateral wind load on the wind tower is transferred to the main cable through the rigid connection node, and then transferred to the natural mountain by the anchoring structure, thereby achieving spatial coordinated force distribution.

[0120] Through the above construction method, the suspension bridge structure can serve as a hoisting platform during the construction phase and as a lateral load-sharing function during the operation phase, forming a bridge-tower integrated wind power generation system with reused structural functions.

[0121] V. Explanation of Structural Coordination and Stress To further clarify the structural mechanism of the bridge-tower integrated canyon wind power generation system of the present invention, its cooperative force principle is explained below.

[0122] In traditional freestanding tower structures, wind turbines are typically in a single-column cantilever bending state, and under wind load, they form the following force path: Wind load → Tower bending → Tower base bears concentrated bending moment.

[0123] Under this stress mode, the tower base needs to bear all the lateral bending moments, the structural stress is concentrated, the tower body stiffness requirement is high, and the foundation scale is large.

[0124] This invention constructs an integrated bridge-tower structural system by fixing the middle or upper part of the wind tower to the suspension bridge structure through a structural rigid connection node, so that the wind tower is no longer in a single cantilever bending state, but forms a spatial force system with lateral support.

[0125] In this system, when a wind turbine generates a lateral load under wind load, its force transmission path is as follows: Wind load → Wind tower → Rigid connection node → Transverse connecting beam → Suspension bridge structure → Main cable → Anchorage structure → Natural mountain.

[0126] In this force flow path, the main cable, as a tension member, converts part of the lateral bending moment generated by the wind tower into axial tension, which is then transmitted to the natural mountains on both sides through the anchoring structure.

[0127] Because natural mountains have great overall stability and load-bearing capacity, they can effectively share the lateral load borne by the wind tower.

[0128] Through the above structural design, the stress state of the wind tower is transformed from a traditional single-point fixed cantilever system to a multi-point spatially constrained system. The wind tower receives constraint from the suspension bridge structure in the lateral direction, thereby reducing the peak bending moment borne by the tower base and improving the stress distribution in the tower body.

[0129] Meanwhile, the suspension bridge structure is laid out along the lateral force direction of the wind tower, and its main cable has good horizontal load-bearing capacity and elastic deformation capacity. Under wind load, the tension generated by the main cable forms a reverse constraint on the wind tower, limiting its lateral displacement.

[0130] After the bridge towers form an integrated structure, the wind towers, suspension bridge structure and natural mountain form a continuous force-bearing system. The components work together in space to achieve load sharing and transfer.

[0131] In addition, by setting up a damping structure between the wind tower and the suspension bridge structure, the energy generated by the vibration of the bridge-tower integrated system under wind load can be dissipated, thereby further improving the overall structural stability.

[0132] Meanwhile, by linking the pressure sensor with the pitch control system of the wind turbine, a feedback mechanism is established between the structural stress and the wind turbine's operating status. When an increase in lateral force is detected, the wind-receiving area can be reduced by adjusting the blade angle, thereby reducing the load acting on the wind tower at the source.

[0133] Thus, this invention forms a "spatial force flow transfer mechanism" at the structural level and an "active force adjustment mechanism" at the control level, enabling the integrated bridge-tower structure to maintain stable operation under complex wind field conditions.

[0134] Through the above-described structural collaborative force-bearing method, the present invention achieves the following structural improvements: 1. Convert the lateral bending moment of the wind tower into axial tension of the main cable; 2. Utilize the natural hillsides on both sides to share the lateral load of the wind tower; 3. Reduce the concentration of bending moment at the tower base; 4. Improve the stability of tall wind towers in canyon terrain; 5. To form a coordinated force-bearing system between the bridge structure and the wind tower structure.

[0135] Therefore, this invention utilizes the horizontal bearing capacity of the suspension bridge structure through the integrated bridge-tower structural design, constructs a cross-space collaborative force-bearing system under complex terrain conditions, and provides a structural foundation for high-altitude wind energy development.

[0136] VI. Comparative Analysis of Stress on Traditional Independent Tower Structures To further illustrate the improved structural stress effect of the bridge-tower integrated canyon wind power generation system of the present invention, a comparative analysis of the structural system of the present invention and the traditional independent tower structure is presented.

[0137] (I) Stress Model of Traditional Independent Tower Structure In traditional wind power systems, the wind tower is usually a single-column cantilever structure with its bottom fixed to the foundation.

[0138] Under the action of lateral wind load F, the stress mode of the tower is a typical cantilever beam bending model.

[0139] Let H be the height of the wind turbine hub center from the tower base, then the tower base bending moment is: ; in: F is the resultant lateral wind load on the wind turbine generator set; H is the vertical distance from the point of action of the wind turbine generator to the base of the tower.

[0140] In this structural system, all bending moments generated by lateral wind loads are borne by the tower base, and the peak bending moment of the tower base increases linearly with the tower height.

[0141] (II) The stress model of the integrated bridge tower structure of the present invention In the structural system of this invention, the middle or upper part of the wind tower is connected to the suspension bridge structure through structural connection nodes to form a structural connection capable of transmitting bending moment and shear force.

[0142] When the wind tower undergoes lateral deformation under the action of lateral wind load F: Some of the lateral forces are borne by the tower base; Some of the lateral forces are transmitted to the main cable of the suspension bridge through rigid connection nodes; The main cable converts this force into axial tension, which is then transmitted to the natural mountainside on both sides through the anchoring structure.

[0143] Let h be the height of the wind turbine connection node from the tower base. Then the actual bending moment borne by the tower base is: ; in: Load sharing factor (0 < ≤ 1); h is the height from the connecting node to the tower base; This represents the equivalent force arm correction term shared by the suspension bridge structure.

[0144] Under ideal elastic constraints, as the stiffness of the connection nodes increases, the value of α increases, and the bending moment of the tower base decreases significantly.

[0145] (III) Analysis of the reduction ratio of bending moment The reduction ratio of the tower base bending moment can be expressed as: ; Substituting into the above formula, we get: ; Therefore, it can be seen that: When the height h of the connection node is close to the height H of the fan; And the connection stiffness is large enough ( Approaching 1); The bending moment at the tower base can be significantly reduced.

[0146] For example: When: h = 0.7H, = 0.8 then: = 0.56 That is, the bending moment of the tower base can theoretically be reduced by more than 50%.

[0147] (iv) Analysis of the force flow transfer mechanism In traditional freestanding towers: Wind load → Tower bending → Tower base bears all bending moment In the integrated bridge tower structure of this invention: Wind load → Wind tower → Connection node → Main cable → Anchoring structure → Natural mountain Part of the bending moment is converted into axial tension in the main cable.

[0148] Since the main cable is a high-efficiency tension member, its material utilization efficiency is much higher than that of bending members. From the perspective of structural mechanics: The concentrated bending moment is transformed into a distributed axial tensile force. More uniform stress distribution; The utilization rate of structural materials is higher.

[0149] (v) Improvement in structural stability Through the above-described spatial force flow transfer mechanism, the present invention has the following structural improvement effects: 1. The peak bending moment at the tower base is reduced; 2. The bending deformation of the tower body is reduced; 3. The lateral displacement at the top is reduced; 4. Wind-induced vibration response is reduced; 5. Enables higher tower height designs; 6. The basic dimensions can be appropriately reduced.

[0150] Therefore, this invention is not a simple structural superposition, but rather a transformation from a "single-column cantilever system" to a "spatial collaborative force-bearing system" at the level of structural stress mode.

[0151] This transformation alters the transmission path and stress characteristics of lateral wind loads, resulting in clear and quantifiable technical effects.

[0152] Example 1: Single-tower bridge-tower integrated example In this embodiment, as Figure 1 As shown, a suspension bridge structure is constructed between two relatively distributed natural mountains, forming a canyon space between the two natural mountains.

[0153] The suspension bridge structure includes a main cable, a bridge deck structure, and anchorage structures embedded within the natural mountain. Both ends of the main cable are anchored to corresponding anchorage structures, which, together with the mountain rock mass, form an integrated load-bearing structure to withstand the tensile force generated by the main cable.

[0154] A wind tower is installed within the canyon space, with its foundation located at the bottom of the canyon or on a mountain platform and fixedly connected to the foundation or rock structure.

[0155] The middle or upper part of the wind tower is fixedly connected to the suspension bridge structure through a structural rigid connection node. The structural rigid connection node includes a ring-shaped reinforcing structure and a transverse connecting beam, which forms a rigid connection with the suspension bridge structure.

[0156] At least one wind turbine generator set is installed on the side of the wind tower on the windward side. The wind turbine generator set includes a nacelle, a hub, and blades.

[0157] In this embodiment, when the wind turbine generates a lateral load under wind load, the lateral load is transferred to the rigid connection node through the wind tower, and then transferred to the main cable by the lateral connection beam. The main cable generates tension and is transferred to the natural mountains on both sides through the anchoring structure.

[0158] This creates a spatial force flow transmission path between the wind tower, the main cable, and the natural mountain, converting part of the lateral bending moment of the wind tower into the axial tension of the main cable, thereby reducing the peak bending moment borne by the tower foundation.

[0159] In this embodiment, the suspension bridge structure can also be used as a hoisting platform during the construction phase. By setting up a fixed and moving pulley block and cooperating with a winch, the installation of the wind tower body components and wind turbine generator set can be completed.

[0160] This embodiment is the basic structural form of the present invention. By forming an integrated load-bearing system between the single wind tower and the suspension bridge structure, the spatial distribution of lateral loads is achieved.

[0161] Example 2: Integrated Bridge Tower and Dual Wind Tower System In another embodiment, two wind towers are installed on the same suspension bridge structure, with the two wind towers located at different positions within the canyon space.

[0162] Both wind towers are fixedly connected to the suspension bridge structure through their respective structural rigid connection nodes, forming a multi-point bridge-tower integrated structural system.

[0163] The two wind towers can be symmetrically arranged at the mid-span of the suspension bridge, or spaced apart along the bridge span. The specific arrangement can be designed according to the canyon topography and wind resource conditions.

[0164] At least one wind turbine is installed on the windward side of each wind tower.

[0165] In this embodiment, when the two wind towers generate lateral loads under wind load, their respective lateral loads are transferred to the main cable in the suspension bridge structure through the corresponding rigid connection nodes.

[0166] As a continuous tension member, the main cable forms a distributed tension state under the action of multiple force points, and transmits the resultant force to the natural mountain through the anchoring structures on both sides.

[0167] In this multi-tower arrangement structure, the main cable bears the lateral force from the two wind towers, forming a spatial force system with multi-point loading and continuous force.

[0168] Through the above structural design, the suspension bridge structure can simultaneously bear the lateral load-sharing function of the two wind towers during the operation phase, and can still be used for hoisting the two wind towers and corresponding wind turbine equipment during the construction phase.

[0169] Compared with the single-tower implementation, this implementation improves the utilization rate of canyon space by arranging multiple towers, and achieves higher wind energy utilization efficiency while maintaining the integrated force-bearing mechanism of bridge towers.

[0170] Example 3: Preferred Rigid Connection Node Reinforcement Example Based on the above embodiments, this embodiment further optimizes the structural rigid connection node.

[0171] The structural rigid connection node includes a ring-shaped reinforcing structure and a transverse connecting beam. In this embodiment, the structural form of the ring-shaped reinforcing structure and the transverse connecting beam is reinforced.

[0172] (I) Strengthening structure of ring reinforcement In this embodiment, the annular reinforcing structure is a box-shaped annular structure, which includes: Outer ring plate; Inner ring plate; Several radial partitions are disposed between the inner and outer ring plates; Stiffening ribs are installed in the circumferential direction.

[0173] The annular reinforcing structure is integrally and fixedly connected to the wind tower wall by welding.

[0174] By setting up inner and outer double-layer ring plates and radial diaphragm structures, the ring-reinforced structure is transformed into a multi-chamber box structure, thereby improving the local bending stiffness and shear stiffness of the node area.

[0175] When a wind tower bends under wind load, the stress in the tower wall diffuses circumferentially through the ring-shaped reinforcement structure, thus alleviating local stress concentration.

[0176] (II) Optimized Structure of Transverse Connecting Beams In this embodiment, the transverse connecting beam is preferably a box girder structure, and its cross-section includes: Upper wing panel; Lower wing panel; Both sides of the web; Internal reinforcing ribs.

[0177] One end of the transverse connecting beam is rigidly connected to the annular reinforcing structure, and the other end is fixedly connected to the connecting component in the suspension bridge structure.

[0178] Preferably, the transverse connecting beam is provided with a gradually changing cross-section structure along the connection direction, that is, the cross-section height is larger at the end near the wind tower and relatively smaller at the end near the suspension bridge structure, so that the force flow can be smoothly transmitted in the connection transition area.

[0179] By using a gradually changing cross-section design, the bending moment and shear force gradually transition at the connection point, reducing abrupt stress.

[0180] (III) Mechanism of force flow diffusion in the nodal region In this embodiment, when the wind tower is subjected to lateral wind load: The bending stress of the tower body is transmitted through the tower wall to the ring-shaped reinforcing structure, diffused through the radial diaphragm, transmitted to the transverse connecting beam, and then transmitted to the suspension bridge structure.

[0181] Because the ring-shaped reinforcing structure forms a closed box-shaped ring structure, the node area forms a three-dimensional force diffusion path, so that the local stress is no longer concentrated at a single connection position.

[0182] This structure can improve the fatigue resistance of the node area and is suitable for operating environments that are subjected to long-term wind load cycles.

[0183] (iv) Coordination between nodes and main cable In this embodiment, the connection position between the transverse connecting beam and the suspension bridge structure is preferably close to the stress path of the main cable.

[0184] When the wind tower generates a lateral load, the force is directly transferred to the corresponding stress area of ​​the main cable through the lateral connecting beam, causing the main cable to generate axial tension.

[0185] As a flexible tension member, the main cable has a certain elastic deformation capacity when subjected to tensile force. By strengthening the stiffness design of the structure through node reinforcement, a stable rigid-flexible cooperative system is formed between the wind tower and the main cable.

[0186] in: The wind tower and node area are provided with rigid support; The main cable provides elastic tensile constraint; The natural mountain provides the final support.

[0187] (v) Optimize damping and sensor arrangement In this embodiment, a damping structure can be installed between the transverse connecting beam and the suspension bridge structure.

[0188] Preferably, the damping structure is set on the upper and lower sides of the transverse connecting beam and connected to the suspension bridge structure by an oblique arrangement to improve vibration energy dissipation efficiency.

[0189] Meanwhile, pressure sensors can be installed at the junction of the annular reinforcing structure and the transverse connecting beam to monitor the stress state of the nodes in real time.

[0190] By strengthening the node structure, optimizing the force flow path, and setting up a damping and monitoring system, the rigid connection node becomes a stable and reliable core force-bearing part.

[0191] In summary, this invention constructs a suspension bridge structure between two natural mountains, integrating the wind turbine towers with the suspension bridge structure through structurally rigid connection nodes to form a unified load-bearing system. This allows the lateral loads generated by the wind turbine towers under wind loads to be transferred to the natural mountains on both sides via the main cable, thereby sharing the bending moment of the tower foundation and improving the stress state of the tower body. Furthermore, this invention combines a hoisting structure with an active control system, achieving a balance between construction feasibility and operational safety in complex canyon terrain conditions, providing a new structural system for the efficient utilization of high-altitude wind energy resources.

[0192] Through the above technical solution, the present invention realizes the transformation of the wind tower's stress mode from the traditional single-column cantilever system to a spatial collaborative stress system, making full use of the canyon terrain conditions and the horizontal bearing capacity of the suspension bridge structure, thereby improving the stability and adaptability of the wind power system in complex terrain environments.

[0193] It should be noted that the above specific embodiments are merely preferred embodiments of the present invention, used to illustrate the technical solution of the present invention, and not to limit the scope of protection of the present invention. Those skilled in the art can make various modifications, substitutions, or equivalent improvements to the structural form, connection method, component arrangement, quantity configuration, or technical parameters of the present invention without departing from the spirit and substance of the present invention, and all such modifications, substitutions, or improvements should fall within the scope of protection of the present invention.

[0194] Furthermore, the embodiments described in this specification can be combined with each other to form new implementation methods without conflict. All equivalent modifications or obvious substitutions made based on the technical concept of this invention should be covered within the scope of protection of this invention.

Claims

1. A bridge-tower integrated canyon-type wind power generation system, characterized in that, include: Two natural mountains are located opposite each other, forming a canyon space between them; A suspension bridge structure spanning two natural mountains, the suspension bridge structure includes a main cable, a bridge deck structure and anchorage structures respectively set in the two natural mountains, the two ends of the main cable being anchored in the anchorage structures respectively; At least one wind tower is installed in the canyon, with the foundation of the wind tower located at the bottom of the canyon or at a predetermined position under the mountain. At least one wind turbine generator set is installed at a fixed position on the windward side of the wind tower; in, The top of the wind tower is connected to the suspension bridge structure through a structural connection node that can transmit bending moment and shear force, so that the wind tower and the suspension bridge structure form an integrated load-bearing structural system. The structural connection nodes form a force transmission channel between the wind tower and the main cable, so that the lateral load generated by the wind tower under wind load is transmitted to the main cable through the structural connection nodes, causing the main cable to generate axial tension, and the lateral load is transmitted to the two natural mountains through the anchoring structure to share the bending moment borne by the wind tower foundation. The suspension bridge structure is arranged along the lateral force direction of the wind tower, and is used to provide lateral support for the wind tower and its upper wind turbine by utilizing the horizontal bearing capacity of the suspension bridge structure. A pressure sensor is installed between the wind tower and the suspension bridge structure. The pressure sensor is electrically connected to the pitch control system of the wind turbine generator set and is used to adjust the working angle of the wind turbine generator set blades according to the detected stress state.

2. The bridge-tower integrated canyon wind power generation system according to claim 1, characterized in that: The top of the wind tower is at the same height as or higher than the bridge deck of the suspension bridge.

3. The bridge-tower integrated canyon wind power generation system according to claim 1, characterized in that: The structural connection node includes an annular reinforcing structure disposed on the outer periphery of the wind tower, and a transverse connecting beam extending from the annular reinforcing structure toward the suspension bridge. The transverse connecting beam is connected to the suspension bridge structure to form a structural connection relationship capable of transmitting bending moment and shear force.

4. The bridge-tower integrated canyon wind power generation system according to claim 3, characterized in that: The transverse connecting beams are fixedly connected to the suspension bridge structure by high-strength bolts, welding, or a combination of bolting and welding.

5. The bridge-tower integrated canyon wind power generation system according to claim 1, characterized in that: A damping structure is installed between the wind tower and the suspension bridge structure to reduce the vibration response of the integrated bridge tower structure under wind load.

6. The bridge-tower integrated canyon wind power generation system according to claim 5, characterized in that: The damping structure is at least one of a hydraulic damper, a viscous damper, a friction damping device, or a tuned mass damper.

7. The bridge-tower integrated canyon wind power generation system according to claim 1, characterized in that: The wind turbine generator set is installed on the side of the wind tower facing the wind.

8. The bridge-tower integrated canyon wind power generation system according to claim 1, characterized in that: The suspension bridge structure is used for hoisting wind tower components and wind turbine generator parts during the construction of wind towers.

9. A method for constructing a bridge-tower integrated canyon-type wind power generation system, characterized in that, Includes the following steps: S1 involves conducting wind resource assessment, topographic mapping, and engineering geological surveys between two relatively distributed natural mountains, and designing the system structure accordingly. S2 involves constructing a suspension bridge structure between two natural mountains, with the two ends of the main cable anchored to the two natural mountains respectively; S3, construct at least one wind tower foundation and install the wind tower body in the canyon; S4, build the wind tower at a position that is level with or higher than the bridge deck of the suspension bridge; S5 connects the wind tower to the suspension bridge structure through structural connection nodes that can transmit bending moment and shear force, forming an integrated bridge-tower load-bearing structural system. S6, Install at least one wind turbine generator on the windward side of the wind tower; S7, a pressure sensor is installed between the wind tower and the suspension bridge structure and connected to the pitch control system of the wind turbine to adjust the blade angle of the wind turbine according to the stress state.

10. The construction method according to claim 9, characterized in that: In step S2, the main cable anchorage chamber is formed in the natural mountain by a combination of manual excavation and gas fracturing technology.

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