A new tower base structure and power transmission tower

Abstract

This application discloses a novel tower base structure and transmission tower. The tower base structure includes a base body, a baffle assembly, and a resonant control system. The base body has symmetrical sloping surfaces on both sides. The baffle assembly consists of three baffles arranged gradient along the sloping surfaces, forming a three-stage water storage tank (the third tank is located at the lowest point). The resonant control system includes an asymmetrically arranged resonant control cavity and a bidirectional water pump. The control cavity is connected to the third water storage tank via a flow guide channel (the inlet corresponds to a preset water level in the tank). The bidirectional water pump dynamically changes the counterweight distribution by adjusting the water volume in the control cavity. This structure achieves rainwater diversion and sediment sedimentation through three-stage water storage, preventing foundation liquefaction; and effectively suppresses tower resonance by utilizing the dynamic tuning of the asymmetrical water cavity.

Description

Technical Field

[0001] This application relates to the field of high-voltage power transmission infrastructure technology, and more specifically, to a novel tower base structure and power transmission tower. Background Technology

[0002] Traditional transmission tower foundations are mostly constructed of cast concrete, and their drainage systems are often limited to simple drainage holes, which are insufficient to effectively prevent rainwater infiltration. Over long-term operation, rainwater seeps in along the contact surface between the tower foundation and the soil, causing the soil to gradually liquefy and loosen. Especially under wind loads, the resonance effect between the tower and the foundation exacerbates soil structural damage, leading to uneven settlement and even tilting of the tower foundation. While existing technologies have improved the situation by strengthening the foundation or adding drainage ditches, they have failed to effectively address the coordinated control of the resonance amplification effect and the drainage system, making it difficult to guarantee the long-term stability of the tower foundation. Therefore, there is an urgent need to develop a new tower foundation structure with dynamic counterweight adjustment and multi-stage flow guidance functions to simultaneously suppress resonance and optimize drainage efficiency. Utility Model Content

[0003] This application provides a novel tower base structure for the installation of transmission towers. The tower base structure includes a base, a baffle assembly, and a resonance control system. The base has symmetrically arranged outwardly inclined slopes on both sides. The baffle assembly includes a first baffle, a second baffle, and a third baffle arranged along the slope gradient. Each baffle forms a first water storage tank, a second water storage tank, and a third water storage tank with the corresponding slope surface, respectively. The third water storage tank is located at the lowest gradient position. The resonance control system includes resonance control cavities and a bidirectional water pump. At least two resonance control cavities are non-centrally symmetrically arranged within the base. Each resonance control cavity is connected to the third water storage tank via a flow guide channel. The inlet height of the flow guide channel corresponds to a preset water level line of the third water storage tank. The bidirectional water pump is connected to both resonance control cavities and is used to adjust the water volume in the resonance control cavities to regulate the counterweight and prevent resonance between the base and the transmission tower.

[0004] In some embodiments, a drop-type transition structure with a height difference of H1 is formed between the first water storage tank and the second water storage tank, and a two-stage drop structure with a height difference of H2 is formed between the second water storage tank and the third water storage tank, where H2 = 1.2H1 - 1.5H.

[0005] In some embodiments, the third water storage tank is provided with a reserved cavity, and a filter layer for filtering silt is provided on the upper part of the reserved cavity.

[0006] In some embodiments, the filter layer comprises, from top to bottom, layers of sand and gravel, anthracite, and quartz sand.

[0007] In some embodiments, the bottom height of the inlet is set to 80%-90% of the design capacity of the reserved cavity.

[0008] In some embodiments, at least one of the resonant control cavities is provided with a drainage pipe and a corresponding drainage pump that communicate with the outside world.

[0009] In some embodiments, the flow control of the bidirectional water pump forms a negative feedback regulation with the natural frequency of the tower.

[0010] In some embodiments, a waterproof coating is provided on the outer surface of the substrate and inside the resonant control cavity.

[0011] In some embodiments, the slope forms an angle of 15°-45° with the horizontal plane.

[0012] This application also provides a power transmission tower, which includes a tower body and the aforementioned tower base structure, wherein the tower body is fixedly connected to the tower base structure via flange connectors.

[0013] The tower base structure of this application forms a three-stage water storage tank through a gradient baffle assembly, achieving graded rainwater diversion and gradual sedimentation, effectively preventing ground liquefaction caused by rainwater infiltration. The asymmetric resonant control cavity and bidirectional water pump work in synergy, dynamically adjusting the counterweight distribution according to the tower's vibration frequency, thus solving the problem of resonance amplification in traditional structures. The coordinated design of slope diversion and dynamic counterweight improves the overall overturning resistance of the tower base and is adaptable to geological conditions with slope angles of 15°-45°. This structure simultaneously solves the two major technical bottlenecks of drainage and seepage control and resonance suppression, extending the service life of the transmission tower by more than [amount missing] and reducing maintenance costs.

[0014] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0016] Figure 1 This is a half-sectional schematic diagram of the tower base structure according to the embodiment of this application;

[0017] Figure 2 yes Figure 1 Enlarged view of section A;

[0018] Figure 3 This is a schematic diagram of the transmission tower installed on the tower base structure according to the embodiments of this application.

[0019] Explanation of main component symbols: Tower base structure 100, base body 10, slope surface 11, flow guiding channel 12, water inlet 121, baffle assembly 20, first baffle 21, first water storage tank 211, second baffle 22, second water storage tank 221, third baffle 23, third water storage tank 231, reserved cavity 232, filter layer 233, resonant control system 30, bidirectional water pump 31, resonant control cavity 32, transmission tower 400, tower body 41. Detailed Implementation

[0020] The embodiments of this application will be further described below with reference to the accompanying drawings. The same or similar reference numerals in the drawings denote the same or similar elements or elements having the same or similar functions throughout.

[0021] Furthermore, the embodiments of this application described below in conjunction with the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting this application.

[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] Please see Figure 1 and Figure 2 This application provides a novel tower base structure 100 for the installation of transmission towers. The tower base structure 100 includes a base 10, a baffle assembly 20, and a resonant control system 30. The base 10 has outwardly inclined slopes 11 symmetrically arranged on both sides. The baffle assembly 20 includes a first baffle 21, a second baffle 22, and a third baffle 23 arranged along the slope 11. A first water storage tank 211, a second water storage tank 221, and a third water storage tank 231 are formed between each baffle and the corresponding slope 11, respectively, wherein the third water storage tank 231 is located at the lowest gradient position. The resonant control system 30 includes a resonant control cavity 32 and a bidirectional water pump 31. At least two resonant control cavities 32 are non-centrally symmetrically arranged in the base 10. Each resonant control cavity 32 is connected to the third water storage tank 231 through a flow guide channel 12. The height of the inlet 121 of the flow guide channel 12 corresponds to the preset water level line of the third water storage tank 231. The bidirectional water pump 31 is connected to the two resonant control cavities 32. The bidirectional water pump 31 is used to adjust the water volume of the resonant control cavity 32 to adjust the counterweight and prevent the base 10 from resonating with the transmission tower.

[0024] The tower base structure 100 of this application forms a three-stage water storage tank through a gradient baffle assembly 20, realizing graded rainwater diversion and gradual sedimentation, effectively preventing foundation liquefaction caused by rainwater infiltration. The asymmetric resonant control cavity 32 and the bidirectional water pump 31 work together to dynamically adjust the counterweight distribution according to the tower vibration frequency, solving the problem of resonance amplification in traditional structures. The synergistic design of slope diversion and dynamic counterweight improves the overall overturning resistance of the tower base and is suitable for geological conditions with slope angles of 15°-45°. This structure simultaneously solves the two major technical bottlenecks of drainage and seepage control and resonance suppression, extending the service life of the transmission tower and reducing maintenance costs.

[0025] Specifically, the tower base structure 100 may be exposed to the external environment, but this application preferably places it buried in the soil. The base 10 adopts a trapezoidal symmetrical structural design, with its two sides sloped at an angle of 15° to 45° to the horizontal plane, and the outer surface of the tower base is provided with a waterproof coating (not shown). This embodiment preferably adopts a 30° angle design. The base 10 is made of fiber-reinforced composite concrete (FRCC), which has the following characteristics:

[0026] 1) Compressive strength reaches over 80MPa, which is 40% higher than that of ordinary concrete;

[0027] 2) Built-in basalt fiber mesh cloth improves crack resistance by 3 times;

[0028] 3) The surface is treated with silane to form a hydrophobic layer with a contact angle >120°.

[0029] 4) The addition of nano-silica reduces the chloride ion diffusion coefficient to 0.5 × 10⁻⁶. -12 m 2 / s.

[0030] The structural design enables the base 10 to have both mechanical performance optimization and drainage guidance functions. Its trapezoidal cross section can effectively disperse the bending moment load transmitted by the tower, while the flow channel 12 formed by the sloping surface 11 controls the rainwater runoff velocity within the range of 0.3-0.5m / s.

[0031] Please see Figure 1 and Figure 2 The baffle assembly 20 includes a first baffle 21, a second baffle 22, and a third baffle 23 arranged along the slope surface 11 in a gradient. The three baffles form a ring-shaped water storage tank 211, a second water storage tank 221, and a third water storage tank 231 arranged from top to bottom around the slope, with the third water storage tank 231 located at the lowest gradient position. The bottom of each water storage tank is filled with leveled concrete to make the bottom of the tank horizontal. The design of the water storage tanks allows the buried soil 13 to remain moist and adhere tightly to the slope, preventing cracking and soil loosening.

[0032] Furthermore, a drop-type transition structure with a height difference of H1 is formed between the first water storage tank 211 and the second water storage tank 221, and a two-stage drop-type structure with a height difference of H2 is formed between the second water storage tank 221 and the third water storage tank 231, where H2 = 1.2H1 - 1.5H. The drop-type structure can increase the oxygen content of the water flow and effectively inhibit anaerobic bacterial corrosion. The two-stage height difference is optimized at 1.35H1, and the water flow velocity is controlled at approximately 0.35-0.45 m / s. In the embodiment of this application, H1 ranges from 150-300 mm, and simulation verification shows that this size allows 90% of particles with a diameter > 0.5 mm to deposit in the second water storage tank 221.

[0033] At least two resonant control cavities 32 are asymmetrically arranged within the substrate 10. Asymmetry means that the two cavities are not symmetrical with respect to the central axis of the substrate 10. This can be due to vertical offset, horizontal offset, or a combination of both. The asymmetrical design helps to avoid resonance. There can be two, three, four, or more resonant control cavities 32. This application preferably uses two resonant control cavities 32.

[0034] Please continue reading. Figure 1 and Figure 2 Each cavity is connected to the third water storage tank 231 via a circular cross-section guide channel 12. The inlet 121 of the guide channel 12 is located on the side wall of the third water storage tank 231, with its lower edge positioned at 85% ± 2% of the design water level of the tank, and equipped with a swing check valve with an opening and closing pressure difference ≤ 0.03 MPa. The cavity assembly is equipped with a variable frequency bidirectional water pump 31 system, with a flow regulation accuracy of ±0.5%, and forms a closed-loop control system with the tower vibration monitoring system.

[0035] Furthermore, the third water storage tank 231 is equipped with a reserved cavity 232, and a filter layer 233 for filtering sediment is provided on the upper part of the reserved cavity 232. The filter layer 233 includes a sand and gravel layer, anthracite, and quartz sand from top to bottom. The sand and gravel layer (particle size 5-10mm) intercepts large particles, the anthracite (particle size 2-4mm) adsorbs colloids, and the quartz sand (particle size 0.5-1mm) filters out fine impurities, with a turbidity removal rate of ≥95%. Thus, the water entering the resonant control cavity 32 is clean.

[0036] The bottom height of the inlet 121 is set to 80%-90% of the design capacity of the reserved cavity 232. At least one of the resonant control cavities 32 is equipped with a drainage pipe and a corresponding drainage pump connected to the outside. The drainage pump is used to drain the water stored in the third water storage tank 231 to prevent overload during heavy rain.

[0037] Furthermore, the flow control of the bidirectional water pump 31 forms a negative feedback regulation with the natural frequency of the tower. The flow rate of the bidirectional water pump 31 and the natural frequency of the tower form a negative feedback through a fuzzy PID algorithm, extending the resonance suppression bandwidth to 0.5-5Hz.

[0038] A waterproof coating (not shown) is also provided inside the resonant control cavity 32. The surface of the substrate 10 and the inner wall of the resonant control cavity 32 are both coated with epoxy coal tar pitch (2 mm thick), with a salt spray resistance life of ≥25 years.

[0039] Please see Figure 3 This application also provides a power transmission pole 400, including a tower body 41 and the aforementioned tower base structure 100, wherein the tower body is fixedly connected to the tower base structure 100 via flange connectors. Wind speed sensors and vibration sensors are mounted on the tower body, and the central control system controls a bidirectional water pump 31 based on feedback from the wind speed sensors and vibration sensors to adjust the water level in the resonant control cavity 32.

[0040] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the stated features. In the description of this application, "multiple" means at least two, such as two or three, unless otherwise explicitly specified.

[0042] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A novel tower base structure for the installation of transmission towers, characterized in that, include: The substrate has outwardly inclined slopes symmetrically arranged on both sides; A baffle assembly, comprising a first baffle, a second baffle, and a third baffle arranged along the gradient of the slope surface, wherein each baffle forms a first water storage tank, a second water storage tank, and a third water storage tank with respect to the corresponding slope surface, wherein the third water storage tank is located at the lowest gradient position; A resonant control system includes a resonant control cavity and a bidirectional water pump. At least two resonant control cavities are non-centrally symmetrically arranged within the substrate. Each resonant control cavity is connected to a third water storage tank via a flow guide channel. The inlet height of the flow guide channel corresponds to a preset water level line of the third water storage tank. The bidirectional water pump is connected to both resonant control cavities and is used to adjust the water volume in the resonant control cavities to regulate the counterweight and prevent resonance between the substrate and the transmission tower.

2. The tower base structure according to claim 1, characterized in that, The first water storage tank and the second water storage tank form a drop-type transition structure with a height difference of H1, and the second water storage tank and the third water storage tank form a two-stage drop structure with a height difference of H2, where H2 = 1.2H1 - 1.5H.

3. The tower base structure according to claim 1, characterized in that, The third water storage tank is provided with a reserved cavity, and a filter layer for filtering mud and sand is provided on the upper part of the reserved cavity.

4. The tower base structure according to claim 3, characterized in that, The filter layer comprises, from top to bottom, layers of sand and gravel, anthracite, and quartz sand.

5. The tower base structure according to claim 3, characterized in that, The bottom height of the inlet is set to 80%-90% of the designed capacity of the reserved cavity.

6. The tower base structure according to claim 3, characterized in that, At least one of the resonant control cavities is provided with a drainage pipe and a corresponding drainage pump that are connected to the outside.

7. The tower base structure according to claim 6, characterized in that, The flow control of the bidirectional water pump forms a negative feedback regulation with the natural frequency of the tower.

8. The tower base structure according to claim 1, characterized in that, The outer surface of the substrate and the inner surface of the resonant control cavity are provided with a waterproof coating.

9. The tower base structure according to claim 1, characterized in that, The slope forms an angle of 15°-45° with the horizontal plane.

10. A power transmission tower, characterized in that, It includes a tower body and a tower base structure as described in any one of claims 1-9, wherein the tower body is fixedly connected to the tower base structure via flange connectors.

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