A circular ring type steel-modified asphalt tower structure and a construction method thereof

Abstract

This invention relates to the field of offshore wind power generation equipment technology, specifically to a circular steel-modified asphalt tower structure and its construction method. The tower body is composed of several tower sections stacked vertically. Each tower section includes an inner and outer ring steel tower section that are coaxial and nested together. The inner and outer ring steel tower sections form a filling space for filling modified asphalt. Several mutually cooperating L-shaped stiffening ribs are evenly distributed within this filling space. These L-shaped stiffening ribs are welded to the inner and outer ring steel tower sections respectively. This invention offers superior resistance to the forces exerted on the structure by hurricanes, waves, and ocean currents, resulting in better energy dissipation. Furthermore, the structure is relatively simple, ensuring the reliability and stability of tall tower structures, and is cost-effective.

Description

Technical Field

[0001] This invention relates to the field of offshore wind power generation equipment technology, specifically to a circular steel-modified asphalt tower structure and its construction method. Background Technology

[0002] Wind turbine towers are the supports and vibration absorbers in wind turbine generators. Offshore wind turbine towers are typically constructed to a greater height, formed by splicing multiple tower sections together. Existing towers are primarily steel cylinder splicing structures, while some use a circular steel structure as the main body filled with concrete. However, these towers share common drawbacks: they experience significant vibrations and have poor dynamic load-bearing capacity under the influence of hurricanes, waves, and currents, making them prone to dynamic instability and collapse. Especially under high-intensity wind and wave impacts, the fatigue life and stability of traditionally designed towers face severe challenges. Furthermore, while meeting requirements for height, stiffness, and strength, project costs must also be considered. Therefore, developing a new type of steel tower structure that combines high strength, high stiffness, and economy has become an urgent technical problem to be solved. Summary of the Invention

[0003] This invention provides a circular steel-modified asphalt tower structure and construction method. The invention significantly improves the damping ratio and energy dissipation capacity of the tower structure through the use of composite modified asphalt materials. A spatial grid-like constraint system is formed between the inner and outer steel tower rings using stiffening ribs, allowing the injected modified asphalt and steel tower to form an integrated stress distribution, improving the adhesion and synergistic performance between the inner and outer steel tower rings and the modified asphalt. The modified asphalt material, through composite modification with the addition of steel slag and mineral slag, effectively solves the shortcomings of traditional asphalt materials, such as insufficient load-bearing capacity and temperature sensitivity. The addition of mineral materials enhances the mechanical properties of the asphalt, improving its load-bearing capacity and resistance to high and low temperatures, making it more stable and reliable in complex environments. The tower structure provided by this invention can better control vibration, effectively protecting the overall stability and safety of the structure. Due to the excellent mechanical properties of the modified asphalt, the steel cylinder can be thinner, enabling the construction of taller towers while reducing the amount of steel cylinder material used, making construction more economical.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows:

[0005] A circular steel-modified asphalt tower structure includes: a tower body, which is composed of several tower sections stacked vertically, each tower section including an inner ring steel tower and an outer ring steel tower that are coaxial and nested together, and the inner and outer ring steel towers form a filling space for filling modified asphalt, wherein several mutually cooperating L-shaped stiffening ribs are evenly distributed in the filling space, and the L-shaped stiffening ribs are welded to the inner ring steel tower and the outer ring steel tower respectively.

[0006] Preferably, the inner and outer steel tower sections are provided with flange structures at their upper and lower ends, and the flange structures are evenly distributed with connection holes. The connection holes between adjacent tower sections are aligned one-to-one, and high-strength bolts pass through the aligned connection holes. The high-strength bolts are used to connect and fix the adjacent flange structures with nuts.

[0007] Preferably, both the inner and outer ring steel towers are frustum-shaped cylindrical structures. The tower body, which is formed by splicing the various tower sections, forms a frustum structure as a whole. The lower part of the bottom tower section is embedded in the tower foundation. The outer ring steel tower of the bottom tower section has a modified asphalt inlet, which is connected to an input pipe.

[0008] Preferably, the L-shaped stiffening rib is provided with multiple groups, and each group of L-shaped stiffening ribs includes two L-shaped plates, wherein the horizontal section of one L-shaped plate is located at the bottom and the horizontal section of the other L-shaped plate is located at the top. The two horizontal sections are arranged opposite each other in an interlocking posture and form a grid-like space at the interlocking point. The two ends of the L-shaped plate are respectively welded to the inner wall of the outer ring steel tower and the outer wall of the inner ring steel tower.

[0009] Preferably, the modified asphalt is a mineral composite modified asphalt, in which a skeleton component is filled, wherein the skeleton component is slag, steel slag, plastic particles, or rubber particles, and the weight of the skeleton component accounts for 85%-95% or more than 95% of the total weight of the modified asphalt; wherein the weight of the rubber particles accounts for 1%-3% of the total weight of the modified asphalt, and the weight of the plastic particles accounts for 1%-6% of the total weight of the modified asphalt.

[0010] Preferably, the modified asphalt material is a mineral composite modified asphalt, which is filled with a skeleton component, which consists of slag, plastic particles and rubber particles; wherein, the amount of slag accounts for 70%-90% of the total volume of the modified asphalt; the weight of the rubber particles is 1%-3% of the total weight of the modified asphalt; and the plastic particles account for about 1%-6% of the total weight of the modified asphalt.

[0011] A construction method for a circular steel-modified asphalt tower structure includes the following steps:

[0012] Step 1: Design the specific dimensions of each tower section according to the preset dimensions of the tower body, and prefabricate the inner and outer steel tower sections that make up each tower section in the factory; weld the prefabricated L-shaped stiffening ribs between the inner and outer steel tower sections to form tower sections; weld flange structures at the top and bottom of the inner and outer steel tower sections respectively, and open connection holes;

[0013] Step 2: Transport the tower section 2 to the construction location, straighten the bottom tower section, weld its bottom to the steel cage in the tower foundation, and then pour the tower foundation.

[0014] Step 3: After the tower foundation reaches the set strength, install each tower segment in sequence above the bottom tower segment. The installation method is as follows: align the flange structures of the upper and lower adjacent tower segments and place rubber gaskets between the mating flange structures to prevent modified asphalt leakage. On this basis, connect and fix the adjacent tower segments with high-strength bolts and nuts.

[0015] Step 4: After all tower sections are installed, inject modified asphalt into the filling space of each tower section through the input pipe and pressurization pump. Stop the input after filling with sufficient modified asphalt, and remove the input pipe after the modified asphalt has solidified.

[0016] The circular steel-modified asphalt tower structure and construction method of the present invention have the following beneficial effects:

[0017] 1. The circular steel-modified asphalt tower structure has a better effect on resisting the forces of hurricanes, waves, and ocean currents. The structure has a better energy dissipation effect and a relatively simple structure, which ensures the reliability and stability of the tower structure with a high height. The mineral composite modified asphalt material is poured between the inner and outer steel towers. The coupling effect of the modified asphalt and the L-shaped stiffening ribs improves the damping ratio, making the structure better resist external forces. The thickness requirements of the inner and outer steel towers are lower, and the difficulty in material selection and processing technology is reduced, making it more economical and effective.

[0018] 2. L-shaped stiffening ribs significantly improve the tower's resistance to bending, torsion, and buckling;

[0019] 3. Reduce the risk of local instability and crack propagation in the tower, and extend its service life;

[0020] 4. The tower is a prefabricated structure, which is simple to install, safe and reliable, and has good practicality. It greatly reduces the amount of construction work and is easy to maintain. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of a circular steel-modified asphalt tower structure.

[0022] Figure 2 This is a cross-sectional view of a circular steel-modified asphalt tower structure.

[0023] Figure 3 This is a partial layout diagram within a section of the steel tower.

[0024] Figure 4 This is a partial layout diagram of the stiffening ribs.

[0025] The markings in the diagram are: 1. Tower body; 2. Tower section; 21. Inner ring steel tower; 22. Outer ring steel tower; 3. Modified asphalt; 4. Flange structure; 5. L-shaped stiffening rib; 6. Tower foundation. Detailed Implementation

[0026] The following description provides a detailed explanation of the embodiments of the present invention in a step-by-step manner. This description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limiting this invention.

[0028] Example 1: A circular steel-modified asphalt tower structure, such as Figure 1-4 As shown, it includes: a tower body 1, which is composed of several tower segments 2 stacked on top of each other. Each tower segment 2 includes an inner ring steel tower 21 and an outer ring steel tower 22 that are coaxial and nested together. The inner ring steel tower 21 and the outer ring steel tower 22 form a filling space for filling modified asphalt 3. Several L-shaped stiffening ribs 5 are evenly distributed in the filling space. The L-shaped stiffening ribs 5 are welded to the inner ring steel tower 21 and the outer ring steel tower 22 respectively.

[0029] Example 2: As Figure 1-4 As shown, the inner ring steel tower 21 and the outer ring steel tower 22 are respectively provided with flange structures 4 at their upper and lower ends. The flange structures 4 are evenly distributed with connection holes. The connection holes between adjacent tower sections 2 are opposite to each other. High-strength bolts pass through the opposite connection holes. The high-strength bolts are used to connect and fix the adjacent flange structures 4 with nuts.

[0030] Example 3: As Figure 1As shown, both the inner ring steel tower 21 and the outer ring steel tower 22 are frustum-shaped cylindrical structures. The tower body 1, which is formed by splicing together the various tower sections 2, forms a frustum structure. The lower part of the bottom tower section 2 is embedded in the tower foundation 6. The outer ring steel tower of the bottom tower section 2 has a modified asphalt inlet, which is connected to an input pipe (a common structure, not shown in the figure).

[0031] Example 4: Figure 1-4 As shown, the L-shaped stiffening rib 5 is provided with multiple groups, and each group of L-shaped stiffening rib 5 includes 2 L-shaped plates, in which the horizontal section of one L-shaped plate is located at the bottom and the horizontal section of the other L-shaped plate is located at the top. The two horizontal sections are arranged opposite each other in an interlocking posture and form a grid-like space at the interlocking point. The two ends of the L-shaped plate are respectively welded to the inner wall of the outer ring steel tower 22 and the outer wall of the inner ring steel tower 21.

[0032] Example 5: Based on Examples 1-4, this example discloses that: the modified asphalt is a mineral composite modified asphalt, and the asphalt material is filled with a skeleton component, which is slag, steel slag, plastic particles, and rubber particles. The weight of the skeleton component accounts for 85%-95% or more of the total weight of the modified asphalt; wherein, the weight of the rubber particles accounts for 1%-3% of the total weight of the modified asphalt, and the weight of the plastic particles accounts for 1%-6% of the total weight of the modified asphalt.

[0033] Example 6: Based on Examples 1-4, this example discloses that: the modified asphalt material is a mineral composite modified asphalt, and the asphalt material is filled with a skeleton component, which is slag, plastic particles and rubber particles; wherein, the amount of slag accounts for 70%-90% of the total volume of the modified asphalt; the weight of the rubber particles is 1%-3% of the total weight of the modified asphalt; and the plastic particles account for about 1%-6% of the total weight of the modified asphalt.

[0034] Example 7: Based on the above examples, this example discloses a construction method for a circular steel-modified asphalt tower structure, such as... Figure 1-4 As shown, it includes the following steps:

[0035] Step 1: Design the specific dimensions of each tower section 2 according to the preset dimensions of the tower body 1, and prefabricate the inner ring steel tower 21 and outer ring steel tower 22 that constitute each tower section 2 in the factory; weld the prefabricated L-shaped stiffening ribs between the inner ring steel tower 21 and outer ring steel tower 22 to form tower sections; weld flange structures 4 to the top and bottom of the inner ring steel tower and outer ring steel tower respectively, and open connection holes;

[0036] Step 2: Transport tower section 2 to the construction site, straighten the bottom tower section 2, weld its bottom to the steel cage in the tower foundation 6, and then pour the tower foundation 6.

[0037] Step 3: After the tower foundation 6 reaches the set strength, install each tower segment 2 above the bottom tower segment 2 in sequence. The installation method is as follows: align the flange structures 4 of the adjacent tower segments 2 and place a rubber gasket (a common structure, not shown in the figure) between the mating flange structures 4 to prevent modified asphalt leakage. On this basis, connect and fix the adjacent tower segments 2 with high-strength bolts and nuts.

[0038] Step 4: After all tower sections 2 are installed, modified asphalt 3 is injected into the filling space of each tower section 2 through the input pipe and the pressurization pump. After filling with sufficient modified asphalt 3, the input is stopped. After the modified asphalt 3 has formed, the input pipe is removed.

[0039] Working principle of the invention:

[0040] 1. This invention provides a circular steel-modified asphalt tower structure, which is composed of several tower sections stacked one on top of the other. Modified asphalt is injected between the inner and outer steel tower sections, thereby giving the circular steel-modified asphalt tower structure a better ability to dissipate energy, thus better controlling vibration and protecting the overall stability and safety of the structure.

[0041] 2. By injecting modified asphalt between the inner and outer ring steel tower sections, the damping ratio of the tower structure is improved. In one embodiment, the modified asphalt used in this invention is a mineral composite modified asphalt, which is filled with a skeleton component. The skeleton component consists of slag, steel slag, plastic particles, and rubber particles. The weight of the skeleton component accounts for 85%-95% or more of the total weight of the modified asphalt. Among them, the weight of the rubber particles accounts for 1%-3% of the total weight of the modified asphalt, and the weight of the plastic particles accounts for 1%-6% of the total weight of the modified asphalt. The overall performance also meets the index requirements. In another embodiment, the modified asphalt material is a mineral composite modified asphalt, which is filled with a skeleton component. The skeleton component consists of slag, plastic particles, and rubber particles. Among them, the amount of slag accounts for 70%-90% of the total volume of the modified asphalt; the weight of the rubber particles is 1%-3% of the total weight of the modified asphalt; and the plastic particles account for approximately 1%-6% of the total weight of the modified asphalt. 6%; These two composite modified asphalt materials not only improve the damping ratio and energy dissipation capacity of the tower, but also solve the problems of insufficient load-bearing capacity and temperature sensitivity of traditional asphalt materials, ensuring the stability and durability of the tower in complex environments.

[0042] 3. An L-shaped stiffening rib is installed between the inner and outer steel tower sections to form several evenly distributed grid-like spaces. These grid-like spaces form a constraint system, which works together with the injected mineral-modified asphalt to form a stable composite structure, thereby improving the overall stiffness, strength, and energy dissipation capacity of the tower.

[0043] 4. Through optimized design, this tower structure can achieve higher tower construction while ensuring safety and reducing project costs.

Claims

1. A circular steel-modified asphalt tower structure, characterized in that: include: The tower body is composed of several tower sections stacked one on top of the other. Each tower section includes an inner ring steel tower and an outer ring steel tower that are coaxial and nested inside and outside. The inner ring steel tower and the outer ring steel tower form a filling space for filling modified asphalt. Several mutually cooperating L-shaped stiffening ribs are evenly distributed in the filling space. The L-shaped stiffening ribs are welded to the inner ring steel tower and the outer ring steel tower respectively. The L-shaped stiffening ribs are provided in multiple groups. Each group of L-shaped stiffening ribs includes two L-shaped plates, with the horizontal section of one L-shaped plate located at the bottom and the horizontal section of the other L-shaped plate located at the top. The two horizontal sections are arranged opposite each other in an interlocking posture and form a grid-like space at the interlocking point. The two ends of the L-shaped plates are respectively welded to the inner wall of the outer ring steel tower and the outer wall of the inner ring steel tower. The modified asphalt is a mineral-based composite modified asphalt, in which a skeleton component is filled. This skeleton component comprises slag, steel slag, plastic particles, and rubber particles, and its weight accounts for 85%-95% or more of the total weight of the modified asphalt. Specifically, the rubber particles account for 1%-3% of the total weight of the modified asphalt, and the plastic particles account for 1%-6% of the total weight of the modified asphalt. Alternatively, the modified asphalt is a mineral-based composite modified asphalt, in which a skeleton component is filled. This skeleton component comprises slag, plastic particles, and rubber particles. Specifically, the slag accounts for 70%-90% of the total volume of the modified asphalt; the rubber particles account for 1%-3% of the total weight of the modified asphalt; and the plastic particles account for 1%-6% of the total weight of the modified asphalt.

2. The annular steel-modified asphalt tower structure as described in claim 1, characterized in that: The inner and outer steel tower sections are respectively provided with flange structures at their upper and lower ends. The flange structures have evenly distributed connection holes. The connection holes between adjacent tower sections are aligned one-to-one, and high-strength bolts pass through the aligned connection holes. The high-strength bolts are used to connect and fix the adjacent flange structures with nuts.

3. The annular steel-modified asphalt tower structure as described in claim 2, characterized in that: Both the inner and outer ring steel towers are frustum-shaped cylindrical structures. The tower body, which is assembled from the various tower sections, forms a frustum structure as a whole. The lower part of the bottom tower section is embedded in the tower foundation. The outer ring steel tower of the bottom tower section has a modified asphalt inlet, which is connected to an input pipe.

4. The construction method of a circular steel-modified asphalt tower structure as described in claim 3, characterized in that, Includes the following steps: Step 1: Design the specific dimensions of each tower section according to the preset dimensions of the tower body, and prefabricate the inner and outer steel tower sections that make up each tower section in the factory; weld the prefabricated L-shaped stiffening ribs between the inner and outer steel tower sections to form tower sections; weld flange structures at the top and bottom of the inner and outer steel tower sections respectively, and open connection holes. Step 2: Transport the tower section 2 to the construction location, straighten the bottom tower section, weld its bottom to the steel cage in the tower foundation, and then pour the tower foundation. Step 3: After the tower foundation reaches the set strength, install each tower segment in sequence above the bottom tower segment. The installation method is as follows: align the flange structures of the upper and lower adjacent tower segments and place rubber gaskets between the mating flange structures to prevent modified asphalt leakage. On this basis, connect and fix the adjacent tower segments with high-strength bolts and nuts. Step 4: After all tower sections are installed, inject modified asphalt into the filling space of each tower section through the input pipe and pressurization pump. Stop the input after filling with sufficient modified asphalt, and remove the input pipe after the modified asphalt has solidified.

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