Tower drum foundation and installation method

Abstract

The invention relates to the technical field of wind power construction, and discloses a tower drum foundation and an installation method.The tower drum foundation comprises a plurality of split units arranged at the bottom of a tower drum, a rigid reinforcing assembly, a first pouring layer and a second pouring layer, the tower drum foundation is arranged to be the multiple prefabricated split units, and therefore the installation time of the tower drum foundation can be shortened; the size of each split unit is accurate, and the quality is controllable. Each split unit is provided with a rigid reinforcing assembly, the overall structural strength of the tower drum foundation is enhanced, each rigid reinforcing assembly comprises a first rigid part, a second rigid part and a third rigid part, and the first rigid parts, the second rigid parts and the third rigid parts of the adjacent split units are correspondingly connected. The two sides, close to and away from the tower drum, of the first connecting gap can be blocked, a formwork effect is conveniently provided for the pouring process, and the pouring quality is improved. The invention further provides a tower drum foundation installation method which has the advantages that the construction efficiency is high, the construction period is short, and the maintenance time of the tower drum foundation is effectively shortened.

Description

Technical Field

[0001] The invention relates to the technical field of wind power construction, and in particular to a tower foundation and an installation method. Background Art

[0002] Wind energy is a renewable energy source that can provide a long-term and stable energy supply. Wind turbines can be used to convert wind energy into electrical energy for use in various industries. In order to obtain uniform wind power, it is usually necessary to build a wind turbine tower. The wind turbine tower is an important part of the wind power generation system and is used to carry wind turbines and various equipment. In order to maintain the structural stability of the wind turbine tower, a tower foundation is usually set at its bottom to provide stable support for the wind turbine tower.

[0003] However, most existing tower foundations use cast-in-place concrete construction technology, that is, concrete is poured directly on the construction site. The construction quality of this cast-in-place foundation is difficult to guarantee, and the fluidity and other properties of the pouring material are easily affected by the low temperature environment. In order to improve construction efficiency and quality, an assembled foundation can be used, that is, a prefabricated unit is processed in a factory and then assembled on site. The assembled foundation has precise dimensions, controllable quality, little impact on the environment, and is less restricted by seasons and weather, which can shorten the overall on-site foundation construction and maintenance time.

[0004] For wind turbine towers, due to the large load on the wind turbine foundation, high requirements are placed on connection reliability and overall stability. The existing connection methods between prefabricated components are not strong enough, and they are prone to loosening or damage during construction or long-term operation. In addition, the prefabricated components are large in size and weight, making on-site assembly difficult and requiring high technical skills from construction workers. Therefore, there are currently few cases of using prefabricated concrete foundations in wind turbine towers, especially prefabricated assembled foundations suitable for hybrid towers. Summary of the invention

[0005] Based on the above problems, the purpose of the present invention is to provide a tower foundation and an installation method to enhance the structural strength and structural integrity of the tower foundation, reduce the construction difficulty, and improve the construction efficiency.

[0006] In order to achieve the above objectives, the following technical solutions are provided:

[0007] In a first aspect, the present invention provides a tower foundation, comprising:

[0008] A plurality of split units are arranged at the bottom of the tower, each of which includes a bottom plate and a support assembly, the support assembly includes a column and a beam support, the column is used to connect the tower, the column is connected to the bottom plate through the beam support, a first connecting gap is formed between adjacent supporting assemblies, a second connecting gap is formed between adjacent bottom plates, and the second connecting gap is connected to the first connecting gap;

[0009] A rigid reinforcement component, the rigid reinforcement component comprises a first rigid component, a second rigid component and a third rigid component, the first rigid component is arranged on a side of the column close to the tower, the second rigid component is arranged on a side of the beam support close to the tower, and the third rigid component is arranged on a side of the support component away from the tower;

[0010] The first rigid members provided on the adjacent split units are connected correspondingly, and the second rigid members provided on the adjacent split units are connected correspondingly to block the side of the first connection gap close to the tower; the third rigid members provided on the adjacent split units are connected correspondingly to block the side of the first connection gap away from the tower;

[0011] A first pouring layer, the first pouring layer is filled and arranged in the first connecting gap;

[0012] The second pouring layer is filled in the second connection gap.

[0013] Optionally, the first rigid part, the second rigid part and the third rigid part arranged on adjacent split units are connected to each other by welding, the welds between adjacent first rigid parts and the welds between adjacent second rigid parts are sealed on the side of the first connecting gap close to the tower, and the welds between adjacent third rigid parts are sealed on the side of the first connecting gap away from the tower.

[0014] Optionally, the tower foundation further includes a plurality of anchors, and the first rigid member, the second rigid member and the third rigid member are all arranged on the split unit via the plurality of anchors.

[0015] Optionally, the tower foundation also includes multiple first anti-shear structures and multiple second anti-shear structures, the multiple first anti-shear structures are arranged on one side of the support assembly close to the first connecting gap, and the multiple second anti-shear structures are arranged on one side of the base plate close to the second connecting gap.

[0016] Optionally, the plurality of first anti-shear structures and the plurality of second anti-shear structures are uniformly arranged on the support assembly and the base plate, respectively, and the plurality of first anti-shear structures and the plurality of second anti-shear structures are all groove structures.

[0017] Optionally, the tower foundation further includes a prestressed tensioning member, which is passed through the column and used to connect the tower, and the prestressed tensioning member is used to connect the tensioning equipment so that the prestressed tensioning member can tighten the tower.

[0018] Optionally, multiple columns are connected to each other to form a first cavity, and multiple beam supports are connected to each other to form a second cavity. The second cavity is connected to the first cavity, and the cross-sectional area of ​​the second cavity is larger than the cross-sectional area of ​​the first cavity. The second cavity is used to place the tensioning equipment and can be connected to the maintenance channel of the tower.

[0019] Optionally, the tower foundation further includes an isolation bottom layer, which is disc-shaped and disposed below the plurality of split units.

[0020] Specifically, each split unit further includes a rib beam, and the bottom plate and the supporting assembly are respectively connected to the rib beam.

[0021] In a second aspect, the present invention further provides a tower foundation installation method for installing the above-mentioned tower foundation, comprising the following steps:

[0022] A plurality of split units are arranged at the bottom of the tower;

[0023] A rigid reinforcement component is arranged on each split unit, a first rigid component is arranged on a side of the column close to the tower, a second rigid component is arranged on a side of the beam support close to the tower, and a third rigid component is arranged on a side of the support component away from the tower;

[0024] The first rigid member, the second rigid member and the third rigid member provided on the adjacent split units are connected correspondingly to block the two sides of the first connection gap away from and close to the tower;

[0025] A grouting material is poured into the first connecting gap at the upper part of the split unit until the grouting material forms a first pouring layer and a second pouring layer in the first connecting gap and the second connecting gap, respectively.

[0026] The beneficial effects of the present invention are:

[0027] The present invention provides a tower foundation, wherein a first connecting gap and a second connecting gap are formed between adjacent split units, and the first rigid parts and the second rigid parts of the adjacent split units are respectively connected to each other, and can be blocked on the side of the first connecting gap close to the tower, and the third rigid parts of the adjacent split units are connected to each other, and block the side of the first connecting gap away from the tower. When pouring above the first connecting gap, a rigid reinforcement component is provided to restrict the flow of the pouring material, and ensure that the pouring material flows along the first connecting gap to the second connecting gap, so that the pouring material completely fills the first connecting gap and the second connecting gap, and forms a first pouring layer and a second pouring layer, avoiding the occurrence of problems such as incomplete pouring and unrestricted flow direction of the pouring material, improving the pouring quality, ensuring the connection strength between the split units, and improving the connection integrity of the tower foundation. The rigid reinforcement component is provided to enhance the overall structural strength of the tower foundation. In addition, the tower foundation is provided as a plurality of prefabricated split units instead of a cast-in-place foundation, which can shorten the construction time, reduce the influence of factors such as weather on the construction process, and improve the overall construction efficiency of the tower foundation. The present invention also provides a tower foundation installation method. Using the installation method to install the tower foundation has the advantages of high construction efficiency, short construction period and effectively shortening the on-site construction time and tower foundation maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0029] Figure 1 It is a structural schematic diagram of a tower foundation provided by a specific embodiment of the present invention;

[0030] Figure 2 is a cross-sectional view of a tower foundation provided in a specific embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of the structure of a split unit provided in a specific embodiment of the present invention;

[0032] Figure 4 It is a structural schematic diagram of a split unit provided with a first anti-shear structure and a second anti-shear structure provided in a specific embodiment of the present invention.

[0033] In the figure:

[0034] 1. Split unit; 11. Bottom plate; 111. Second shear-resistant structure; 12. Support assembly; 121. Pillar; 122. Beam support; 123. First shear-resistant structure; 13. First connecting gap; 14. Second connecting gap; 15. Rib beam; 2. Rigid reinforcement assembly; 21. First rigid part; 22. Second rigid part; 23. Third rigid part; 3. Isolation bottom layer. DETAILED DESCRIPTION

[0035] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inside" and "outside" indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which 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. Among them, the terms "first chamber" and "second chamber" are two different chambers.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and 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.

[0038] like Figures 1 to 4 As shown, the present invention proposes a tower foundation, including a plurality of split units 1 arranged at the bottom of the tower, a rigid reinforcement assembly 2, a first pouring layer and a second pouring layer, each split unit 1 includes a base plate 11 and a support assembly 12, the support assembly 12 includes a column 121 and a beam support 122, the column 121 is used to connect the tower, the column 121 is connected to the base plate 11 through the beam support 122, a first connecting gap 13 is formed between adjacent support assemblies 12, a second connecting gap 14 is formed between adjacent base plates 11, and the second connecting gap 14 is connected to the first connecting gap 13. Setting the tower foundation as a plurality of prefabricated split units 1 can shorten the installation time of the tower foundation, and the size of each split unit 1 is accurate and the quality is controllable. Compared with the cast-in-place tower foundation, the method of assembling a plurality of split units 1 into a tower foundation is less affected by factors such as seasons or low temperature environments, and has higher construction efficiency.

[0039] like Figure 1-Figure 3As shown, the rigid reinforcement assembly 2 includes a first rigid member 21, a second rigid member 22 and a third rigid member 23. The first rigid member 21 is arranged on the side of the column 121 close to the tower, the second rigid member 22 is arranged on the side of the beam support 122 close to the tower, and the third rigid member 23 is arranged on the side of the support assembly 12 away from the tower. The rigid reinforcement assembly 2 can reduce the structural fatigue and damage of the tower foundation caused by various factors during long-term use, and extend the service life of the tower foundation. The first rigid member 21, the second rigid member 22 and the third rigid member 23 are made of materials with high rigidity, and for the convenience of processing, the three can be set as a plate-like structure, such as a steel plate. The first rigid members 21 arranged on adjacent split units 1 are connected correspondingly, and the second rigid members 22 arranged on adjacent split units 1 are connected correspondingly, which can block the side of the first connection gap 13 close to the tower. The third rigid members 23 arranged on adjacent split units 1 are connected correspondingly, which can block the side of the first connection gap 13 away from the tower.

[0040] In order to enhance the connection strength between adjacent split units 1, it is usually necessary to pour grouting materials into the gaps between the split units 1. However, during conventional pouring operations, the pouring materials are easily flowed to other areas during the pouring process, thereby causing material waste or the pouring materials cannot completely fill the gaps. In the tower foundation proposed by the present invention, a rigid reinforcement component 2 is provided on the split unit 1, and the first rigid member 21, the second rigid member 22 and the third rigid member 23 between the adjacent split units 1 can be connected correspondingly, blocking the first connection gap 13 close to and away from the tower. On the side, when pouring grouting material into the first connection gap 13 at the upper part of the split unit 1, the grouting material can automatically flow from the first connection gap 13 to the second connection gap 14 connected to the first connection gap 13 due to its own fluidity. After filling, the first pouring layer and the second pouring layer are formed in the first connection gap 13 and the second connection gap 14 respectively. The rigid reinforcement component 2 can not only improve the overall structural strength of the tower foundation, but also provide a template for the pouring process of the grouting material, improve the pouring quality, and enhance the connection strength of adjacent split units 1. The grouting material can be selected from high-strength materials such as concrete, or high-quality adhesive materials such as epoxy grouting materials.

[0041] The first rigid part 21, the second rigid part 22 and the third rigid part 23 provided on the adjacent split units 1 can be connected to each other by welding. The welds between the adjacent first rigid parts 21 and the welds between the adjacent second rigid parts 22 are sealed on the side of the first connection gap 13 close to the tower, and the welds between the adjacent third rigid parts 23 are sealed on the side of the first connection gap 13 away from the tower. The rigid reinforcement components 2 of the adjacent split units 1 are respectively connected by welding, which is relatively simple to operate and has high construction efficiency. Moreover, welding can realize the sealing connection of adjacent welded parts, and the connection effect is good. In order to realize the connection between the rigid reinforcement component 2 and the split unit 1, multiple anchors can be provided, and the first rigid part 21, the second rigid part 22 and the third rigid part 23 are all provided on the split unit 1 by multiple anchors. The operation of connecting the two using anchors is simple, convenient for operators to operate, and the connection process has little effect on the performance of the first rigid part 21, the second rigid part 22 and the third rigid part 23. In order to improve the construction efficiency, anchor holes can be pre-set when processing the split unit 1 to provide installation positions for the anchors, thereby saving construction time.

[0042] In order to enhance the connection strength of the split unit 1, a rib beam 15 may be provided on each split unit 1, the side of the rib beam 15 is connected to the support assembly 12, and the bottom surface is connected to the bottom plate 11. In order to adapt to the shape of the split unit 1, the third rigid member 23 may be processed into a concave shape, and the first rigid member 21 and the second rigid member 22 may be processed into a rectangular plate structure.

[0043] The tower is usually set in a cylindrical shape. In order to make the tower foundation and the tower fit together and facilitate processing, the base plate 11, the column 121 and the beam support 122 can all be processed into a fan ring shape, and the area of ​​the base plate 11 should be larger than the areas of the column 121 and the beam support 122, so that the base plate 11 can effectively transfer the load on the tower and improve the structural stability of the split unit 1 itself.

[0044] like Figure 1 and Figure 2 As shown, when the tower foundation is set in the underground space, in order to reduce the impact of the underground humid environment on the tower foundation, an isolation bottom layer 3 can be pre-cast at the bottom of multiple split units 1. The isolation bottom layer 3 can be cast using concrete materials. The casting shape of the isolation bottom layer 3 can be disc-shaped. The specific casting size can be adjusted according to the size of each split unit 1. The area of ​​the isolation bottom layer 3 is larger than the outermost area of ​​the structure after the split units 1 are assembled.

[0045] The tower foundation may also include prestressed tension members, such as Figure 1 and Figure 2As shown, the prestressed tensioning member is passed through the column 121 and is used to connect the tower. The prestressed tensioning member is used to connect the tensioning equipment so that the prestressed tensioning member can tighten the tower. The prestressed tensioning member can pre-stress the split unit 1 to cope with the load it will receive when the tower foundation and the tower are connected. The prestressed tensioning member can be a tensioning cable, which is passed through the column 121 in a direction that is angled with the horizontal direction.

[0046] In one embodiment, a plurality of columns 121 are interconnected to form a first cavity, a plurality of beam supports 122 are interconnected to form a second cavity, the second cavity is connected to the first cavity, and the cross-sectional area of ​​the second cavity is larger than the cross-sectional area of ​​the first cavity. The second cavity is used to place the tensioning equipment and can be connected to the maintenance passage of the tower. The second cavity can provide a placement space for the tensioning equipment, reduce the occupation of the construction space by the tensioning equipment, and reserve space for operators to enter the tower for maintenance.

[0047] like Figure 1-Figure 4 As shown, the tower foundation may also include a plurality of first anti-shear structures 123 and a plurality of second anti-shear structures 111, wherein the plurality of first anti-shear structures 123 are arranged on the side of the support assembly 12 close to the first connection gap 13, and the plurality of second anti-shear structures 111 are arranged on the side of the bottom plate 11 close to the second connection gap 14. The first anti-shear structures 123 and the second anti-shear structures 111 can share the shear stress on the connection parts of each split unit 1, reduce the risk of excessive stress in the local part of the structure, and improve the shear strength and bearing capacity of the entire structure. The plurality of first anti-shear structures 123 and the plurality of second anti-shear structures 111 can be evenly arranged on the support assembly 12 and the bottom plate 11, respectively, so that when the tower is affected by wind, the load borne by the tower foundation can be evenly distributed between the split units 1, reducing the risk of cracking of part of the structure due to uneven force on the split units 1, and ensuring the overall stability of the tower foundation. The plurality of first anti-shear structures 123 and the plurality of second anti-shear structures 111 may be configured as groove structures. The configuration of the groove structures can increase the contact area between adjacent split units 1 during casting and enhance the connection strength between adjacent split units 1 .

[0048] The present invention also provides a tower foundation installation method for installing the tower foundation, which mainly includes the following steps: arranging a plurality of split units 1 at the bottom of the tower; arranging a rigid reinforcement assembly 2 on each split unit 1, arranging a first rigid member 21 on the side of the pedestal 121 close to the tower, arranging a second rigid member 22 on the side of the beam support 122 close to the tower, and arranging a third rigid member 23 on the side of the support assembly 12 away from the tower; connecting the first rigid members 21 arranged on adjacent split units 1 to each other, and connecting the second rigid members 22 arranged on adjacent split units 1 to each other, so as to block the side of the first connection gap 13 close to the tower. Connecting the third rigid members 23 arranged on adjacent split units 1 to each other, so as to block the side of the first connection gap 13 away from the tower, and then pouring grouting material from the upper part of the split unit 1 into the first connection gap 13, until the grouting material forms a first pouring layer and a second pouring layer in the first connection gap 13 and the second connection gap 14, respectively. In order to shorten the installation time of each split unit 1, embedded parts can be pre-arranged around the tower to locate the installation position of each split unit 1. The tower foundation installation method proposed in the present invention is characterized by high construction efficiency and short construction period. The tower foundation and installation method proposed in the present invention can effectively shorten the on-site construction time and the maintenance time of the tower foundation.

[0049] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. Tower foundation, characterized in that: include: A plurality of split units (1) are arranged at the bottom of a tower, each of the split units (1) comprises a base plate (11) and a support assembly (12), the support assembly (12) comprises a column (121) and a beam support (122), the column (121) is used to connect the tower, the column (121) is connected to the base plate (11) through the beam support (122), a first connecting gap (13) is formed between adjacent support assemblies (12), a second connecting gap (14) is formed between adjacent base plates (11), and the second connecting gap (14) is connected to the first connecting gap (13); A rigid reinforcement component (2), the rigid reinforcement component (2) comprising a first rigid component (21), a second rigid component (22) and a third rigid component (23), the first rigid component (21) being arranged on a side of the platform column (121) close to the tower, the second rigid component (22) being arranged on a side of the beam support (122) close to the tower, and the third rigid component (23) being arranged on a side of the support component (12) away from the tower; The first rigid members (21) provided on adjacent split units (1) are connected correspondingly, and the second rigid members (22) provided on adjacent split units (1) are connected correspondingly, so as to block the first connection gap (13) on one side close to the tower; The third rigid members (23) provided on adjacent split units (1) are connected correspondingly to block the first connection gap (13) on a side away from the tower; A first pouring layer, the first pouring layer is filled and arranged in the first connecting gap (13); A second pouring layer, wherein the second pouring layer is filled in the second connecting gap (14).

2. The tower foundation according to claim 1, characterized in that: The first rigid part (21), the second rigid part (22) and the third rigid part (23) arranged on adjacent split units (1) are connected to each other by welding, the welds between adjacent first rigid parts (21) and the welds between adjacent second rigid parts (22) are sealed at a side of the first connection gap (13) close to the tower, and the welds between adjacent third rigid parts (23) are sealed at a side of the first connection gap (13) away from the tower.

3. The tower foundation according to claim 1, characterized in that: The tower foundation further comprises a plurality of anchoring members, and the first rigid member (21), the second rigid member (22) and the third rigid member (23) are all arranged on the split unit (1) via the plurality of anchoring members.

4. The tower foundation according to claim 1, characterized in that: The tower foundation further comprises a plurality of first anti-shear structures (123) and a plurality of second anti-shear structures (111), wherein the plurality of first anti-shear structures (123) are arranged on a side of the support assembly (12) close to the first connecting gap (13), and the plurality of second anti-shear structures (111) are arranged on a side of the base plate (11) close to the second connecting gap (14).

5. The tower foundation according to claim 4, characterized in that: The plurality of first anti-shear structures (123) and the plurality of second anti-shear structures (111) are respectively and evenly arranged on the support assembly (12) and the base plate (11), and the plurality of first anti-shear structures (123) and the plurality of second anti-shear structures (111) are both groove structures.

6. The tower foundation according to claim 1, characterized in that: The tower foundation also includes a prestressed tensioning member, which is passed through the platform column (121) and is used to connect the tower. The prestressed tensioning member is used to connect a tensioning device so that the prestressed tensioning member can tighten the tower.

7. The tower foundation according to claim 6, characterized in that: A plurality of the pedestals (121) are interconnected to form a first cavity, and a plurality of the beam supports (122) are interconnected to form a second cavity. The second cavity is connected to the first cavity, and the cross-sectional area of ​​the second cavity is larger than the cross-sectional area of ​​the first cavity. The second cavity is used to place the tensioning equipment and can be connected to the maintenance passage of the tower.

8. The tower foundation according to claim 1, characterized in that: The tower foundation further comprises an isolation bottom layer (3), which is disc-shaped and is arranged below the plurality of split units (1).

9. The tower foundation according to claim 1, characterized in that: Each of the split units (1) further comprises a rib beam (15), and the bottom plate (11) and the support assembly (12) are respectively connected to the rib beam (15).

10. The tower foundation installation method is characterized in that: The method for installing a tower foundation according to any one of claims 1 to 9 comprises the following steps: S1, arranging a plurality of split units (1) at the bottom of the tower; S2, a rigid reinforcement assembly (2) is arranged on each split unit (1), a first rigid component (21) is arranged on a side of the platform column (121) close to the tower, a second rigid component (22) is arranged on a side of the beam support (122) close to the tower, and a third rigid component (23) is arranged on a side of the support assembly (12) away from the tower; S3, correspondingly connecting the first rigid member (21), the second rigid member (22) and the third rigid member (23) provided on the adjacent split units (1), and blocking the first connection gap (13) away from and close to the two sides of the tower; S4, pouring grouting material into the first connecting gap (13) at the upper part of the split unit (1), until the grouting material forms a first pouring layer and a second pouring layer in the first connecting gap (13) and the second connecting gap (14), respectively.

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