Wind power tower tube beach-falling foundation and construction method thereof

Abstract

The invention discloses a wind power tower tube beach-falling foundation and a construction method thereof, and relates to the field of wind power facilities. The wind power tower tube beach-falling foundation comprises a first tower tube, a second tower tube, a base and an adjusting piece, the first tower tube is arranged at the end, away from the base, of the second tower tube in a sliding mode, and the adjusting piece is installed in the second tower tube. The first tower drum, the second tower drum and the windmill are assembled at the upper end of the base, the first tower drum and the second tower drum are arranged in a sliding mode, the first tower drum and the windmill are connected and jointly serve as a moving part, and the base and the second tower drum are fixedly connected and jointly serve as a foundation part for beach falling and fixing. The first tower drum is driven by the adjusting part to slide relative to the second tower drum to lift or settle the windmill, so that the height of the first tower drum and the windmill is flexibly adjusted and changed, and compared with a traditional mode that a prestressed inhaul cable provides single-time self-lifting tension, the height of the wind power facility can be reasonably adjusted according to changes of the marine environment, and the wind power generation efficiency is improved. Operation is easy and convenient, and workload is low.

Description

Technical Field

[0001] The present invention relates to the field of wind power facilities, and in particular to a wind power tower beach foundation and a construction method thereof. Background Art

[0002] Due to the stability of sea wind resources and the advantages of large power generation capacity, offshore wind power has become one of the important technologies to reduce carbon emissions in the energy production process. It has the characteristics of being highly dependent on technology-driven and has the conditions to serve as a core power source to promote the development of a global low-carbon economy.

[0003] As the tower foundation of wind power facilities, wind turbine towers mainly play a supporting role in wind turbine generator sets, and can also absorb the vibration of the unit. At present, offshore wind turbine towers in shallow sea areas are constructed and assembled by adopting high pile cap foundations; this structural form is difficult to construct, has high production costs, and a long entire construction period. In related technologies, offshore wind turbine towers in shallow sea areas can be designed with self-lifting systems, but they can only achieve a single self-lifting at a time, and because the self-lifting tension is provided by prestressed cables, the requirements for the cables are relatively high. The actual lifting system is complex to operate and has a large workload. It is difficult to effectively and reasonably adjust the height of wind power facilities according to changes in the marine environment. Summary of the invention

[0004] In order to solve the technical problems raised by the above background technology, the present invention provides a wind power tower foundation, comprising a first tower, a second tower, a base and an adjusting member, wherein the first tower has a connecting side and an installing side, the connecting side of the first tower is limitedly connected with the second tower, and the installing side of the first tower is suitable for connecting with a wind turbine; the second tower is fixedly connected with the base, and the first tower is slidably arranged at an end of the second tower away from the base; the adjusting member is installed in the second tower; The adjusting member is suitable for driving the first tower to slide relative to the second tower so as to lift the windmill or lower the windmill.

[0005] As a preferred technical solution, the regulating member is configured as an airbag structure, the airbag structure is arranged at the bottom of the first tower, and a flow structure is arranged on the base, the flow structure is suitable for connecting the inner cavity of the second tower with the external seawater environment; The airbag structure is inflated when it encounters water, so as to expand and support the first tower tube to slide upward relative to the second tower tube; the airbag structure is deflated and contracted after the water recedes, so that the first tower tube can slide downward relative to the second tower tube under the action of its own weight.

[0006] As a preferred technical solution, the base includes a bulkhead structure and a floating plate, the bulkhead structure and the floating plate are jointly configured with at least one cabin, the bulkhead structure is provided with a connecting hole and a diversion hole, the cabin and the inner cavity of the second tower are connected through the connecting hole, and the cabin and the external seawater environment are connected through the diversion hole.

[0007] As a preferred technical solution, the bulkhead structure includes a connecting section, a transition section and a side wall section, the connecting section is fixedly connected to the second tower, the transition section is connected between the connecting section and the side wall section, the side wall section and the floating plate are fixedly connected, the connecting hole is through-arranged on the connecting section, and at least one connecting hole is arranged, and the guide hole is through-arranged on the side wall section, and at least one guide hole is arranged.

[0008] As a preferred technical solution, the bulkhead structure further includes a circular tube wall structure and a partition, one end of the circular tube wall structure is penetrated by the connecting section, the other end of the circular tube wall structure is fixedly connected to the floating plate, a plurality of the partitions are arranged around the outer circumference of the circular tube wall structure to separate and form a plurality of the cabins, the plurality of the cabins are arranged in a ring, and any cabin is connected and configured with the connecting hole and the guide hole; and / or The connecting section is configured as a circular ring structure, the transition section is configured as a cone cylinder structure, and the side wall section is configured as a circular ring structure.

[0009] As a preferred technical solution, the first tower includes a first cylinder and a first connecting section, the first connecting section is fixedly arranged on a side of the first cylinder close to the second tower, and a side of the first cylinder away from the second tower is connected to the windmill; The second tower comprises a second cylinder and a second connecting section, wherein the second connecting section is fixedly arranged on a side of the second cylinder close to the first tower, and a side of the second cylinder away from the first tower is connected to the base; The second tower is sleeved on the outside of the first connecting section, and the second connecting section is arranged on a moving path of the first connecting section sliding along with the first tower to stop and limit the first connecting section.

[0010] As a preferred technical solution, a first prestressed hole is provided on the first connecting section, and a second prestressed hole is provided on the second connecting section, and the number of the first prestressed holes is the same as the number of the second prestressed holes; the first prestressed hole and the second prestressed hole are suitable for being connected by prestressed tendons to fix the first connecting section and the second connecting section; the first prestressed hole and the second prestressed hole are coaxially arranged.

[0011] As a preferred technical solution, the first connecting section and the second connecting section are both configured as annular structures; The first connecting section is provided with a plurality of guide grooves, which are arranged to extend in an axial direction parallel to the first connecting section, and the guide grooves and the first prestressed holes are arranged to be spaced and avoided; the second tower also includes stiffening ribs, which are fixed inside the second cylinder body, and a plurality of stiffening ribs are arranged to extend in an axial direction parallel to the second cylinder body, and the stiffening ribs and the guide grooves are correspondingly configured for sliding.

[0012] As a preferred technical solution, the first cylinder is configured as a tubular structure, and the second cylinder is configured as a conical structure.

[0013] The present invention also provides a method for constructing a wind power tower foundation, comprising the following steps: Installing an adjustment member in the second tower; Slidingly connecting the first tower and the second tower, and placing the adjustment member at the bottom of the first tower; installing a second tower on the base; Installing the windmill on the first tower; The first tower is driven to slide relative to the second tower by the adjusting member to lift the windmill or lower the windmill, and the windmill is adjusted to be in a desired position; The first tower and the second tower are fixed together by anchoring to fix the position of the windmill.

[0014] The technical solution provided by the present invention has the following advantages: The wind turbine tower beach foundation provided by the present invention comprises a first tower, a second tower, a base and an adjusting member, wherein the first tower has a connecting side and an installing side, the connecting side of the first tower is limitedly connected to the second tower, and the installing side of the first tower is suitable for connecting to a windmill; the second tower and the base are fixedly connected, and the first tower is slidably arranged at an end of the second tower away from the base; the adjusting member is installed in the second tower; the adjusting member is suitable for driving the first tower to slide relative to the second tower to lift the windmill or sink the windmill.

[0015] The wind turbine tower beach foundation of this structure has a first tower, a second tower and a windmill assembled on the upper end of the base, the first tower and the second tower are slidably arranged, the first tower is connected to the windmill, and the two serve as a moving part together, the base and the second tower are fixedly connected, and the two serve as a basic part for beach fixing; the first tower is driven by an adjusting member to slide relative to the second tower to lift or sink the windmill, thereby flexibly adjusting and changing the height of the first tower and the windmill. Compared with the traditional prestressed cable providing a single self-lifting tension, the present invention can reasonably adjust the height of the wind power facility according to changes in the marine environment, and its operation is simple and the workload is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of the wind turbine tower beach foundation provided by the present invention; Figure 2 A schematic cross-sectional view of the beach foundation of a wind turbine tower provided by the present invention; Figure 3 A schematic diagram of the structure of the first tower in the beach foundation of the wind turbine tower provided by the present invention; Figure 4 A schematic cross-sectional view of a first tower in a wind turbine tower beach foundation provided by the present invention; Figure 5 A schematic diagram of the structure of the second tower in the wind turbine tower beach foundation provided by the present invention; Figure 6 A schematic cross-sectional view of a second tower in a wind turbine tower beach foundation provided by the present invention; Figure 7 A schematic diagram of the connection between the first tower and the second tower in the wind turbine tower beach foundation provided by the present invention; Figure 8 A schematic diagram of the structure of a wind turbine tower beach foundation provided by the present invention from a bird's-eye view; Fig. 9 A schematic diagram of the structure of the base of the wind power tower beach foundation provided by the present invention; Fig.10 A schematic cross-sectional view of a base in a wind turbine tower beach foundation provided by the present invention; Fig.11 A cross-sectional stereoscopic view of the base of the wind power tower beach foundation provided by the present invention; Fig.12 A schematic diagram of the connection between the second tower and the base in the wind turbine tower beach foundation provided by the present invention; Fig.13 A cross-sectional stereoscopic view of a second tower and a base in a wind turbine tower beach foundation provided by the present invention; Fig.14 A schematic diagram of the connection of the adjusting parts in the wind power tower beach foundation provided by the present invention; Fig.15 A top view of the structure of the adjusting member in the wind power tower beach foundation provided by the present invention; Fig.16 A schematic diagram of the structure of the wind power tower provided by the present invention before the foundation of the wind power tower is self-lifted; Fig.17 A schematic diagram of the structure of the wind power tower provided by the present invention after the foundation of the wind power tower is self-lifted; Fig.18 A schematic diagram of the assembly of a wind turbine tower beach foundation provided by the present invention located in a local shallow water area; Fig.19 A schematic diagram of the assembly of a wind turbine tower beach foundation provided by the present invention located in a local deep water area; Description of reference numerals: 1-first tower; 11-first cylinder; 12-first connecting section; 121-first prestressed hole; 122-guide groove; 2-second tower; 21-second cylinder; 22-second connecting section; 221-second prestressed hole; 23-stiffening rib; 3-base; 31-bulkhead structure; 311-connecting section; 3111-first connecting hole; 3112-second connecting hole; 312-transition section; 313-side wall section; 3131-first guide hole; 3132-second guide hole; 314-circular tube wall structure; 315-partition plate; 32-floating plate; 33-cabin; 4-adjusting part; 5-prestressed tendon; 6-windmill. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] Example 1 In order to solve the problems that the existing self-lifting system has a complex structure, can only perform self-lifting once, and the prestressed cables that provide tension are costly, the present invention uses buoyancy to replace the tension of the cables, thereby simplifying the self-lifting structure system, achieving multiple self-lifting, and omitting the prestressed cable structure.

[0023] See also Figures 1 to 19 The present embodiment provides a foundation for a wind turbine tower to be placed on the beach, including a first tower 1, a second tower 2, a base 3 and an adjusting member 4. The first tower 1 has a connecting side and an installing side. The connecting side of the first tower 1 is limitedly connected to the second tower 2, and the installing side of the first tower 1 is suitable for connecting to a windmill 6; the second tower 2 and the base 3 are fixedly connected, and the first tower 1 is slidably arranged at an end of the second tower 2 away from the base 3.

[0024] In this embodiment, the adjusting member 4 is installed in the second tower 2 ; the adjusting member 4 is suitable for driving the first tower 1 to slide relative to the second tower 2 , so as to lift the windmill 6 or sink the windmill 6 .

[0025] The first tower 1, the second tower 2 and the windmill 6 are assembled on the upper end of the base 3, and the first tower 1 and the second tower 2 are slidably configured. The first tower 1 is connected to the windmill 6, and the two together serve as the moving part. The base 3 and the second tower 2 are fixedly connected, and the two together serve as the basic part for beach fixing. The first tower 1 is driven by the adjusting member 4 to slide relative to the second tower 2 to lift or sink the windmill 6, so as to flexibly adjust and change the height of the first tower 1 and the windmill 6. Compared with the traditional prestressed cable providing a single self-lifting tension, the present invention can reasonably adjust the height of the wind power facility according to the changes in the marine environment, and its operation is simple and the workload is low.

[0026] In some embodiments, see Figures 3 to 6 The first tower 1 includes a first cylinder 11 and a first connecting section 12, the first connecting section 12 is fixedly arranged on a side of the first cylinder 11 close to the second tower 2, and the side of the first cylinder 11 away from the second tower 2 is connected to the windmill 6; the second tower 2 includes a second cylinder 21 and a second connecting section 22, the second connecting section 22 is fixedly arranged on a side of the second cylinder 21 close to the first tower 1, and the side of the second cylinder 21 away from the first tower 1 is connected to the base 3, and the second tower 2 is sleeved on the outside of the first connecting section 12.

[0027] In a specific embodiment, the first tower 1 is configured as an upper steel structure first tower 1. In order to reduce the weight of the upper first tower 1, a steel structure is used to prefabricate the first tower 1. In a specific structural embodiment, the first cylinder 11 is configured as a tubular structure with an outer diameter of 6.5-7.5 meters, a height of 40-60 meters, and a steel thickness of 30-35 mm. The first connecting section 12 is configured as an annular corbel segment with an outer diameter of 8.5-9.5 meters and a thickness of 0.6-0.8 meters.

[0028] In a specific embodiment, the second tower 2 is a reinforced concrete second tower 2; the second cylinder 21 is a conical structure, the outer diameter of the upper top surface is 8000-12000mm, the outer diameter of the lower top surface is 13000-17000mm, the height of the conical tower is 60-80m, and the thickness is 220-280mm. The second connecting section 22 is an annular corbel segment with an inner diameter of 6.5-7.5m and a thickness of 0.6-0.8m.

[0029] The second connecting section 22 is arranged on a moving path of the first connecting section 12 sliding along with the first tower 1 to stop and limit the first connecting section 12 .

[0030] As a preferred embodiment, see Figures 3 to 6 The first connection section 12 is provided with a first prestressed hole 121, and the second connection section 22 is provided with a second prestressed hole 221. The number of the first prestressed holes 121 is the same as the number of the second prestressed holes 221. The first prestressed holes 121 and the second prestressed holes 221 are suitable for being connected by the prestressed tendons 5 to fix the first connection section 12 and the second connection section 22. The first prestressed holes 121 and the second prestressed holes 221 are coaxially arranged. The first connection section 12 has a plurality of first prestressed holes 121 arranged in an annular direction, and the second connection section 22 has a plurality of second prestressed holes 221 arranged in an annular direction. Preferably, the number of both can be set to 12.

[0031] As a further embodiment, the first connecting section 12 and the second connecting section 22 are both configured as annular structures; see Figure 3 A plurality of guide grooves 122 are provided on the first connecting section 12 . The guide grooves 122 are extended in parallel with the axial direction of the first connecting section 12 . The guide grooves 122 and the first prestressed holes 121 are arranged to be spaced apart and avoided.

[0032] See also Figure 6The second tower 2 also includes a stiffening rib 23, which is fixed inside the second cylinder 21. There are multiple stiffening ribs 23, which extend in the axial direction parallel to the second cylinder 21. The stiffening ribs 23 and the guide grooves 122 are configured to slide in correspondence. The multiple guide grooves 122 uniformly arranged along the circumferential direction on the first connecting section 12 slide through the stiffening ribs 23 and the guide grooves 122 to enhance the relative sliding motion accuracy between the first tower 1 and the second tower 2, and ensure the stability and smooth passing ability of the first tower 1 during the lifting process; the provision of multiple stiffening ribs 23 is conducive to increasing the self-strength of the second tower 2, ensuring the structural rigidity, and can play a role in providing a stable support for the first tower 1 and the windmill 6 connected thereto.

[0033] As a preferred embodiment, the width of the guide groove 122 can be set to 80-120 mm, and the width of the stiffening rib 23 can be set to 80-120 mm; the guide groove 122 and the stiffening rib 23 are conformally configured; four guide grooves 122 and four stiffening ribs 23 can be configured correspondingly.

[0034] For the connection between the first tower 1 and the second tower 2: The second connecting section 22 at the top of the second tower 2 is connected to the first connecting section 12 at the bottom of the first tower 1; specifically, after the first tower 1 is lifted to the predetermined position, the first connecting section 12 is at the lower position of the second connecting section 22, and the outer diameter of the tubular structure at the top of the first tower 1 is equal to the inner diameter of the second connecting section 22, both of which are 6.5-7.5m; the outer diameter of the first connecting section 12 is equal to the inner diameter of the conical structure of the second cylinder 21 at this position, both of which are 8.5-9.5m, so that the first tower 1 can be wrapped and fixed by the second tower 2. The first prestressed hole 121 on the first connecting section 12 and the second prestressed hole 221 on the second connecting section 22 are parallel to the axial direction, and the position and size correspond one to one. The second prestressed hole 221 of the second connecting section 22 is anchored and connected with the first prestressed hole 121 of the lower first connecting section 12 through the detachable prestressed tendons 5. When the first tower 1 is being lifted, the guide grooves 122 uniformly arranged along the circumferential direction of the first connecting section 12 form a limiting fit with the stiffening ribs 23 inside the second tower 2, which is beneficial to enhancing the stability of the first tower 1 during the self-lifting process.

[0035] As an exemplary embodiment, the adjusting member 4 is configured as an airbag structure, the airbag structure is arranged at the bottom of the first tower 1, and a flow structure is arranged on the base 3, and the flow structure is suitable for connecting the inner cavity of the second tower 2 with the external seawater environment; the airbag structure is inflated after encountering water, so as to expand and support the first tower 1 so that it can slide upward relative to the second tower 2; the airbag structure is deflated and contracted after the water recedes, so that the first tower 1 can slide downward relative to the second tower 2 under the action of its own weight.

[0036] In a specific embodiment, the airbag structure has an inflation and deflation end and a deformation and expansion end. The airbag structure is equipped with an inflation and deflation control system (not shown in the figure). The inflation and deflation control system is arranged at the inflation and deflation end, and the deformation and expansion end is arranged toward the bottom of the first tower 1. The inflation and deflation control system includes an inflation bottle, a liquid level sensor and an exhaust valve. The inflation bottle is used to inflate the airbag structure. The liquid level sensor is suitable for detecting the water level in the second tower 2. The exhaust valve is used for exhausting the airbag structure to the outside.

[0037] In a specific embodiment, the airbag structure is configured as a cylindrical airbag, which is coaxially arranged with the second tower 2. The first tower 1 is lifted or lowered by the telescopic buoyancy of the cylindrical airbag; wherein the diameter of the cylindrical airbag is equal to the diameter of the upper first tower 1, which can be set to 6.5-7.5 meters.

[0038] Since the size of the buoyancy is determined by the gravity of the discharged water, as the upper thin tower is lifted, the volume of the thin tower below sea level will become smaller and smaller, so that the reduced buoyancy cannot be balanced with the gravity of the thin tower. In order to solve the problem of decreased buoyancy during the lifting process, during the lifting process of the first tower 1, the inside of the cylindrical airbag is continuously inflated to keep the height of the cylindrical airbag consistent with the lifting height of the second tower 2, and keep the total volume of the water discharged by the cylindrical airbag and the second tower 2 unchanged, so that the buoyancy of the first tower 1 is always balanced with its gravity.

[0039] As a preferred embodiment, see Fig. 9 The base 3 includes a bulkhead structure 31 and a floating plate 32. The bulkhead structure 31 and the floating plate 32 are jointly equipped with at least one cabin 33. A connecting hole and a diversion hole are provided on the bulkhead structure 31. The cabin 33 and the inner cavity of the second tower 2 are connected through the connecting hole, and the cabin 33 and the external seawater environment are connected through the diversion hole.

[0040] As a preferred embodiment, see Fig. 9 and Fig.11 The bulkhead structure 31 includes a connecting section 311, a transition section 312 and a side wall section 313. The connecting section 311 is fixedly connected to the second tower 2. The transition section 312 is connected between the connecting section 311 and the side wall section 313. The side wall section 313 and the floating plate 32 are fixedly connected. A connecting hole is provided through the connecting section 311, and at least one connecting hole is provided. A guide hole is provided through the side wall section 313, and at least one guide hole is provided.

[0041] In some embodiments, the connecting section 311 is configured as a circular ring structure, the transition section 312 is configured as a conical cylinder structure, and the side wall section 313 is configured as a circular ring structure.

[0042] As a preferred embodiment, see Fig.10 and Fig.11The bulkhead structure 31 also includes a circular tube wall structure 314 and a partition 315. A connecting section 311 is provided at one end of the circular tube wall structure 314, and the other end of the circular tube wall structure 314 is fixedly connected to the floating plate 32. A plurality of partitions 315 are arranged on the outer circumference of the circular tube wall structure 314 to isolate and form a plurality of cabins 33. The plurality of cabins 33 are arranged in a ring, and any cabin 33 is connected and configured with a connecting hole and a guide hole.

[0043] See also Fig.10 and Fig.11 , six cabins 33 are provided. Taking one of the cabins 33 as an example, the connecting section 311 is provided with a first connecting hole 3111 and a second connecting hole 3112 connected to the cabin 33, and the side wall section 313 is provided with a first guide hole 3131 and a second guide hole 3132 connected to the cabin 33; that is, two small holes are respectively opened in the connecting section 311 at the upper end of each cabin and the side wall section 313 at the side to inject water and drain water, and the six cabins are not connected to each other; in the specific control process, flow valves can be respectively arranged at the first connecting hole 3111, the second connecting hole 3112, the first guide hole 3131 and the second guide hole 3132 to open their respective injection and drainage holes, so as to control the flow rate of water in and out of the tower, and then control the speed of buoyancy change, and finally control the self-lifting and self-sinking speed of the first tower 1.

[0044] In some structural embodiments, the diameter of the connecting hole is set to 200-250 mm, and the diameter of the guide hole is set to 150-200 mm.

[0045] In some structural embodiments, each compartment is separated by a partition 315 with a thickness of 280-320 mm. The partition 315 not only serves to separate the compartments, but also has the function of locally reinforcing the foundation.

[0046] In some structural implementations, the outer diameter of the circular tube wall structure 314 is set to 6.5-7.5m, and the thickness is set to 300-350mm. The circular tube wall structure 314 and the partition 315 together form the skeleton of the bulkhead structure 31 to bear the load transferred by the upper tower structure.

[0047] In some structural embodiments, a floating plate 32 is arranged at the bottom of the base 3, and the floating plate 32 is radially expanded, and its diameter is set to 35-45 meters and its thickness is set to 0.8-1.2 meters; the floating plate 32 can provide additional fluid dynamic inertia for the entire beach landing structure, which is beneficial for the basic structure to maintain stability under flow load and wave load.

[0048] In a specific embodiment, the base 3 is entirely configured as a reinforced concrete structure. The second tower 2 and the base 3 may be connected via a conical transition section 312, and this connection method specifically uses wet splicing to ensure the integrity and compactness between the base 3 and the second tower 2, and prevent seawater from penetrating into or out of the connection between the second tower 2 and the base 3.

[0049] The wind power tower beach foundation provided by the present invention has the following usage method: When the first tower 1 needs to be lifted upward, the connecting holes and the guide holes are opened, and the principle of liquid static equilibrium is used to allow seawater to flow into the second tower 2. The flow rate of water in and out can be controlled by controlling the number of connecting holes and guide holes opened on the base 3. When the buoyancy of the first tower 1 in the water is equal to the magnitude of its own gravity, the first tower 1 can be slowly lifted upward. At this time, since the volume of the first tower 1 in the water is reduced, in order to ensure that the buoyancy it is subjected to remains unchanged, the airbag structure at the bottom of the first tower 1 can be inflated, and the volume of the inflated gas is consistent with the reduced volume of the first tower 1 in the water, thereby ensuring that the first tower 1 is balanced in force. When the first tower 1 is lifted into place, the detachable prestressed tendons 5 are inserted into the prestressed holes of the first connecting section 12 and the second connecting section 22 for anchoring and fixing.

[0050] When the first tower 1 needs to be lowered, the prestressed tendons 5 on the first connecting section 12 and the second connecting section 22 can be disassembled first, and then the gas in the airbag structure can be discharged and released, thereby reducing the buoyancy of the first tower 1, and the speed of air release inside the airbag structure can be controlled to control the sinking speed of the first tower 1. During the lifting and sinking process of the first tower 1, the guide groove 122 and the stiffening rib 23 form an axial limiting guide structure, which is conducive to ensuring the stable lifting and lowering of the first tower 1.

[0051] In order to solve the problem that the existing high pile foundation is not compatible with the topography of the shallow sea, the present invention adopts a multi-chamber gravity beach foundation to replace the high pile foundation. The multi-chamber gravity beach foundation has low construction difficulty, good stability, and can significantly reduce the manufacturing cost of the foundation.

[0052] The wind turbine tower beach foundation provided by the present invention adopts a beach foundation to replace the offshore high pile foundation. Specifically, buoyancy can be used to construct a self-lifting system, and the buoyancy is used to replace the tension of the prestressed cable to achieve the purpose of raising the tower height.

[0053] The wind power tower beach foundation provided by the present invention can reduce the construction cost of the existing wind power foundation structure and improve its stability; it simplifies the self-lifting structure system and establishes a self-lifting system that can be cycled multiple times; under extreme weather conditions, the tower structure is protected by lowering the tower height.

[0054] Example 2 This embodiment provides a method for constructing a wind turbine tower foundation, which includes the following steps: Installing the adjusting member 4 in the second tower 2; Slidingly connect the first tower 1 and the second tower 2, and place the adjusting member 4 at the bottom of the first tower 1; Install the second tower 2 on the base 3; Install the windmill 6 on the first tower 1; The first tower 1 is driven to slide relative to the second tower 2 by the adjusting member 4, so as to lift the windmill 6 or lower the windmill 6, and adjust the windmill 6 to be in a desired position; The first tower 1 and the second tower 2 are fixed to each other by anchoring to fix the position of the windmill 6.

[0055] The construction method of the wind turbine tower beach foundation provided in this embodiment, during the structural construction phase, the prefabricated floating plate 32 and the base 3 can be placed on the submersible buoy in the shallow water area. With the casting and floating of the base 3, the first tower 1 can be installed and fixed on the base 3 first, and then the second tower 2 can be installed and fixed according to the designed position. After the entire substructure is built, the water ballast of the foundation is added, and the substructure is dragged to a deeper assembly area. Finally, the engine compartment and windmill 6 are installed at the designed position in the deep water area to complete the assembly of the entire structure.

[0056] The construction method provided in this embodiment allows the structure of the beach foundation to be prefabricated on the shore. Through standardized design and modular production, the prestressed tendons 5 can be tensioned in a suitable environment, thereby improving the quality of the structure and improving its safety and economy.

[0057] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A wind power tower foundation, characterized in that: The invention comprises a first tower (1), a second tower (2), a base (3) and an adjusting member (4), wherein the first tower (1) has a connecting side and a mounting side, the connecting side of the first tower (1) is limitedly connected to the second tower (2), and the mounting side of the first tower (1) is suitable for connecting to a windmill (6); the second tower (2) and the base (3) are fixedly connected, and the first tower (1) is slidably arranged at an end of the second tower (2) away from the base (3); and the adjusting member (4) is installed in the second tower (2); The adjusting member (4) is suitable for driving the first tower (1) to slide relative to the second tower (2) so as to lift the windmill (6) or lower the windmill (6).

2. The wind turbine tower beach foundation according to claim 1, characterized in that: The regulating member (4) is configured as an airbag structure, the airbag structure is arranged at the bottom of the first tower (1), and a flow structure is arranged on the base (3), the flow structure is suitable for connecting the inner cavity of the second tower (2) with the external seawater environment; The airbag structure is inflated when it encounters water, so as to expand and support the first tower (1) so that it can slide upward relative to the second tower (2); and the airbag structure is deflated and contracted after the water recedes, so that the first tower (1) can slide downward relative to the second tower (2) under the action of its own weight.

3. The wind turbine tower beach foundation according to claim 2, characterized in that: The base (3) comprises a bulkhead structure (31) and a floating plate (32); the bulkhead structure (31) and the floating plate (32) are jointly provided with at least one cabin (33); a connecting hole and a diversion hole are provided on the bulkhead structure (31); the cabin (33) and the inner cavity of the second tower (2) are connected via the connecting hole; and the cabin (33) and the external seawater environment are connected via the diversion hole.

4. The wind turbine tower beach foundation according to claim 3, characterized in that: The bulkhead structure (31) comprises a connecting section (311), a transition section (312) and a side wall section (313); the connecting section (311) is fixedly connected to the second tower (2); the transition section (312) is connected between the connecting section (311) and the side wall section (313); the side wall section (313) and the floating plate (32) are fixedly connected; the connecting hole is through-set on the connecting section (311), and at least one connecting hole is provided; the guide hole is through-set on the side wall section (313), and at least one guide hole is provided.

5. The wind turbine tower beach foundation according to claim 4, characterized in that: The bulkhead structure (31) further comprises a circular tube wall structure (314) and a partition (315); one end of the circular tube wall structure (314) is provided with the connecting section (311); the other end of the circular tube wall structure (314) is fixedly connected to the floating plate (32); a plurality of partitions (315) are arranged around the outer circumference of the circular tube wall structure (314) to separate and form a plurality of cabins (33); the plurality of cabins (33) are arranged in a ring; any cabin (33) is connected and provided with the connecting hole and the guide hole; and / or The connecting section (311) is configured as a circular ring structure, the transition section (312) is configured as a cone cylinder structure, and the side wall section (313) is configured as a circular ring structure.

6. The wind turbine tower beach foundation according to any one of claims 1 to 5, characterized in that: The first tower (1) comprises a first cylinder (11) and a first connecting section (12), wherein the first connecting section (12) is fixedly arranged on a side of the first cylinder (11) close to the second tower (2), and a side of the first cylinder (11) away from the second tower (2) is connected to the windmill (6); The second tower (2) comprises a second cylinder (21) and a second connecting section (22), wherein the second connecting section (22) is fixedly arranged on a side of the second cylinder (21) close to the first tower (1), and a side of the second cylinder (21) away from the first tower (1) is connected to the base (3); The second tower (2) is sleeved on the outside of the first connecting section (12), and the second connecting section (22) is arranged on a moving path of the first connecting section (12) sliding along with the first tower (1) to stop and limit the first connecting section (12).

7. The wind turbine tower beach foundation according to claim 6, characterized in that: The first connecting section (12) is provided with a first prestressed hole (121), and the second connecting section (22) is provided with a second prestressed hole (221), the number of the first prestressed holes (121) being the same as the number of the second prestressed holes (221); the first prestressed hole (121) and the second prestressed hole (221) are suitable for being connected by a prestressed rib (5) to fix the first connecting section (12) and the second connecting section (22); the first prestressed hole (121) and the second prestressed hole (221) are coaxially arranged.

8. The wind turbine tower beach foundation according to claim 7, characterized in that: The first connecting section (12) and the second connecting section (22) are both configured as annular structures; The first connecting section (12) is provided with a plurality of guide grooves (122), the guide grooves (122) are extended in an axial direction parallel to the first connecting section (12), and the guide grooves (122) and the first prestressed holes (121) are arranged to be spaced and avoided; the second tower (2) also includes a stiffening rib (23), the stiffening rib (23) is fixed inside the second cylinder (21), a plurality of stiffening ribs (23) are provided, the stiffening ribs (23) are extended in an axial direction parallel to the second cylinder (21), and the stiffening ribs (23) and the guide grooves (122) are correspondingly configured for sliding.

9. The wind turbine tower beach foundation according to claim 6, characterized in that: The first cylinder (11) is configured as a tubular structure, and the second cylinder (21) is configured as a conical structure.

10. A method for constructing a wind power tower foundation, characterized in that: The steps include: Installing an adjustment member (4) in the second tower (2); The first tower (1) and the second tower (2) are connected in a sliding arrangement, and the adjustment member (4) is placed at the bottom of the first tower (1); Installing the second tower (2) on the base (3); Installing a windmill (6) on the first tower (1); The first tower (1) is driven to slide relative to the second tower (2) by means of an adjusting member (4) so ​​as to lift the windmill (6) or lower the windmill (6) and adjust the windmill (6) to a desired position; The first tower (1) and the second tower (2) are fixed together by anchoring to fix the position of the windmill (6).

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