A reinforcement device for the uplift resistance foundation of a power transmission tower

Abstract

This utility model discloses a reinforcement device for the uplift resistance of a transmission tower foundation, comprising several reinforcement frame groups surrounding the exposed short column of the tower foundation, with their upper ends pressed against the upper surface of the exposed short column; several top limiting connection structures respectively disposed between two opposite reinforcement frame groups; and several counterweight modules respectively disposed on one side of the lower end of the reinforcement frame groups. The load on the counterweight modules is evenly transferred to the exposed short column of the tower foundation through the reinforcement frame groups to achieve uplift resistance. By surrounding the exposed short column of the tower foundation with reinforcement frame groups and pressing against its upper surface, combined with the top limiting connection structures constraining the position of the reinforcement frame groups, and by adjusting the load through the counterweight modules to achieve even load transfer, this method avoids destructive construction methods such as drilling and rebar installation in traditional reinforcement methods, simplifies the on-site operation process, and ensures a reasonable and effective load transfer path. It features no damage to the original foundation structure during construction, simple and efficient operation, and effective improvement of uplift resistance.

Description

Technical Field

[0001] This utility model relates to the field of power engineering technology, and in particular to a device for reinforcing the pull-out foundation of power transmission towers. Background Technology

[0002] As a critical supporting structure for the power grid system, the stability of transmission tower foundations directly affects the safety and reliability of power transmission. In actual operation, tower foundation design typically uses uplift resistance as the core control indicator to prevent uplift instability under extreme weather conditions such as strong winds and icing. However, with the continuous updating of power industry technical specifications and the increasingly complex meteorological conditions caused by global climate change, many early-built transmission tower foundations can no longer meet current uplift bearing capacity requirements, necessitating the implementation of effective reinforcement measures.

[0003] The commonly used reinforcement method currently involves adding a concrete ring beam between the four tower legs, attempting to balance the distribution of pull-out forces among the legs through the lateral restraint of the ring beam. However, this method has significant drawbacks: First, it requires drilling and rebar installation on the exposed short columns of the original tower foundation, a destructive construction process that severely weakens the integrity of the foundation structure, causing irreversible damage. Second, the construction process involves multiple stages, including formwork erection, rebar tying, concrete pouring, and long-term curing, making the procedures complex and highly dependent on site conditions. This makes it difficult and inefficient to operate in complex field environments. Third, the stiffness of the concrete ring beam is much lower than that of the foundation itself, resulting in insufficient capacity to transfer and balance pull-out loads, failing to form an effective pull-out resistance system. Therefore, traditional reinforcement techniques generally suffer from cumbersome construction operations, strong destructiveness to the original structure, excessively long construction periods, and difficulty in guaranteeing pull-out resistance effects, severely restricting the rapid maintenance and safe operation of power grid facilities. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a reinforcement device for the pull-out foundation of power transmission towers.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A reinforcement device for the uplift-resistant foundation of a power transmission tower includes: Several reinforcement frame groups are arranged around the exposed short column of the iron tower foundation, with their upper ends pressed against the upper surface of the exposed short column of the iron tower foundation. Several top limiting connection structures are respectively disposed between the two opposite reinforcement frame groups; Several counterweight modules are respectively installed on one side of the lower end of the reinforcement frame assembly, which can add or remove weights to adjust the load. The load on the counterweight modules is evenly transferred to the exposed short columns of the tower foundation through the reinforcement frame assembly to play a role in anti-pull-out reinforcement.

[0006] As described above, in a power transmission tower anti-uplift foundation reinforcement device, a bottom limiting connection structure is also provided between the lower ends of several reinforcement frame groups.

[0007] As described above, the bottom limiting connection structure of the transmission tower anti-uplift foundation reinforcement device includes an elastic restraint strap connected between the lower ends of the reinforcement frame group, and the elastic restraint strap is also provided with a crimping buckle.

[0008] As described above, the top limiting connection structure of the transmission tower anti-uplift foundation reinforcement device includes a threaded connection between two opposing reinforcement frame groups and a connecting rod extending from both ends of the threaded connection and respectively connected to the two opposing reinforcement frame groups.

[0009] As described above, a power transmission tower anti-uplift foundation reinforcement device includes a reinforcement frame assembly comprising reinforcement frames respectively disposed at both ends of the sidewall of the exposed short column of the tower foundation. The reinforcement frame includes a connecting frame body attached to the sidewall of the exposed short column of the tower foundation, a pressing frame body disposed at the upper end of the connecting frame body, and a load-bearing frame body disposed at the lower end of the connecting frame body. The pressing frame body presses against the upper surface of the exposed short column of the tower foundation, and the counterweight module is connected to the load-bearing frame body.

[0010] As described above, the anti-uplift foundation reinforcement device for power transmission towers is an integral assembly comprising the connecting frame, the clamping frame, and the load-bearing frame.

[0011] As described above, in a power transmission tower anti-uplift foundation reinforcement device, the counterweight module is a counterweight pool connected to the load-bearing frame.

[0012] As described above, the anti-uplift foundation reinforcement device for power transmission towers comprises four reinforcement frame groups, which are respectively installed on the side walls of the exposed short columns of the tower foundation.

[0013] As described above, in a power transmission tower anti-uplift foundation reinforcement device, a tower foundation protective cap is also provided at the upper end of the exposed short column of the tower foundation, and the top limiting connection structure is respectively arranged around the protective cap of the tower foundation.

[0014] The beneficial effects of this utility model are: the structure of this application is simple. The reinforcement frame is surrounded by the short column exposed at the base of the iron tower and pressed against its upper surface. Combined with the top limiting connection structure to constrain the position of the reinforcement frame, and the counterweight module to increase or decrease the load to achieve uniform load introduction, it avoids the destructive construction such as drilling and rebar installation in traditional reinforcement methods, simplifies the on-site operation process, and ensures that the load transfer path is reasonable and effective. It has the advantages of no damage to the original foundation structure during construction, simple and efficient operation, and effective improvement of pull-out bearing capacity. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is one of the structural schematic diagrams (top view) of a transmission tower anti-uplift foundation reinforcement device according to an embodiment of this utility model; Figure 2 This is the second structural schematic diagram (front view) of a power transmission tower anti-uplift foundation reinforcement device according to an embodiment of this utility model. Detailed Implementation

[0017] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0018] Please see Figure 1 and Figure 2 As shown in the figure, this application provides a device for reinforcing the uplift foundation of a power transmission tower, comprising: Several reinforcement frame groups 1 are arranged around the exposed short column 100 of the tower foundation, with their upper ends pressed against the upper surface of the exposed short column 100 of the tower foundation. The reinforcement frame group 1 serves as a medium for load transfer and structural support. The exposed short column 100 of the tower foundation refers to the short column part of the power transmission tower foundation that is exposed above the ground and is the direct object of this reinforcement device. Several top limiting connection structures 2 are respectively disposed between two opposite reinforcement frame groups 1, for connecting and fixing multiple reinforcement frame groups 1 to ensure the overall stability and coordinated force bearing of the entire reinforcement device; Several counterweight modules 3 are respectively arranged on one side of the lower end of the reinforcement frame group 1, which can add or remove weights to adjust the load. The load on the counterweight module 3 is evenly transferred to the exposed short column 100 of the tower foundation through the reinforcement frame group 1 to play a role in pull-out reinforcement.

[0019] By employing a non-destructive mechanical reinforcement method, the damage to the original foundation short columns caused by rebar installation, as required in traditional concrete ring beam reinforcement, is avoided, thus protecting the original structure. Its modular design facilitates on-site installation and significantly shortens the construction period. Furthermore, the adjustable load function of the counterweight module allows for flexible adjustment of the pull-out resistance according to actual needs, overcoming the shortcomings of traditional ring beams with fixed stiffness and limited pull-out resistance, achieving a highly efficient and controllable pull-out reinforcement effect.

[0020] Furthermore, a bottom limiting connection structure 4 is also provided between the lower ends of several of the reinforcing frame groups 1.

[0021] A bottom limiting connection structure 4 is installed between the lower ends of the reinforcing frame assemblies 1, which can connect the originally relatively independent reinforcing frame assemblies 1 into a whole at the bottom. When the exposed short column 100 of the tower foundation is subjected to pull-out force, the counterweight module 3 transfers the load to the exposed short column 100 of the tower foundation through the reinforcing frame assemblies 1. At this time, the lower end of the reinforcing frame assemblies 1 may tend to expand outward. The bottom limiting connection structure 4 can effectively resist this expansion force and bind the lower ends of each reinforcing frame assembly 1 together to form a stable ring support structure. This not only solves the problem that the lower end of the reinforcing frame assemblies 1 is prone to outward displacement or deformation when subjected to pull-out force, but more importantly, it ensures that the reinforcing frame assemblies 1 are always tightly attached to the side wall of the exposed short column 100 of the tower foundation, maintaining the overall stability of the reinforcement device. Therefore, the load on the counterweight module 3 can be continuously, stably and evenly transferred to the exposed short column 100 of the tower foundation, thereby significantly improving the reliability and efficiency of the pull-out reinforcement and enhancing the structural integrity of the entire reinforcement device under complex stress conditions.

[0022] Furthermore, the bottom limiting connection structure 4 includes an elastic restraint strap 41 connected between the lower ends of the reinforcing frame assembly 1, and the elastic restraint strap 41 is also provided with a snap fastener 42.

[0023] The elastic restraint strap 41, utilizing its inherent elastic properties, effectively adapts to differences in shape and size of the exposed short column 100 of the transmission tower foundation. It provides necessary pre-tension when connecting to the corresponding reinforcement frame assembly 1, ensuring a tight fit between the reinforcement frame assembly 1 and the foundation. This avoids installation difficulties or localized stress concentration problems that may result from rigid connections. Simultaneously, the crimping buckle 42 further enhances the fixing reliability of the elastic restraint strap 41. Through its crimping or locking mechanism, the elastic restraint strap 41 can be firmly locked in a predetermined position, effectively preventing loosening due to vibration or load changes during long-term operation, thus ensuring the continuous stability of the lower connection of the reinforcement frame assembly 1. This connection method, combining flexibility and tightness, not only significantly simplifies the on-site installation process but also effectively alleviates structural fatigue that may be caused by uneven foundation stress through the elastic compensation mechanism. This ensures that the load provided by the counterweight module 3 can be continuously, stably, and evenly introduced into the exposed short column 100 of the tower foundation through the reinforcement frame assembly 1. Therefore, the reinforcement device of this application can effectively improve the overall pull-out reinforcement effect, enhance the pull-out resistance of the transmission tower foundation, and thus ensure the long-term stable operation of the transmission system.

[0024] Furthermore, the top limiting connection structure 2 includes a threaded fastener 21 disposed between the two opposing reinforcement frame groups 1, and a connecting rod 22 extending from both ends of the threaded fastener 21 and respectively connected to the two opposing reinforcement frame groups 1.

[0025] By introducing a mechanical structure in which the threaded joint 21 engages with the connecting rod 22, precise adjustment and locking of the spacing between the reinforcement frame assemblies 1 are achieved. The threaded joint 21, as the core adjusting component, converts torque into axial displacement of the connecting rod 22 through rotational motion. This allows for flexible adjustment of the spacing between the two reinforcement frame assemblies 1 according to the actual dimensions of the exposed short column 100 of the tower foundation, ensuring that the upper end of the reinforcement frame assemblies 1 tightly fits against the upper surface of the exposed short column 100 of the tower foundation. The connecting rod 22, as a force-transmitting component, evenly transmits the adjusting force generated by the threaded joint 21 to the reinforcement frame assemblies 1, enabling the reinforcement frame assemblies 1 to firmly hold the exposed short column 100 of the tower foundation, forming a stable anti-pull-out force-bearing system. This design not only solves the installation difficulties caused by the deviation of the foundation size, but also ensures that the reinforcement device can maintain a stable preload during long-term operation through the self-locking characteristic of the thread 21. This effectively improves the pull-out stability of the overall structure and avoids the loosening risk caused by insufficient installation accuracy in traditional rigid connection methods. As a result, it significantly improves the reliability and reinforcement effect of the transmission tower pull-out foundation reinforcement device.

[0026] Furthermore, the reinforcement frame assembly 1 includes reinforcement frames respectively disposed at both ends of the side wall of the exposed short column 100 of the tower foundation. The reinforcement frame further includes a connecting frame 11 attached to the side wall of the exposed short column 100 of the tower foundation, a clamping frame 12 disposed at the upper end of the connecting frame 11, and a load-bearing frame 13 disposed at the lower end of the connecting frame 11. The clamping frame 12 is clamped to the upper surface of the exposed short column 100 of the tower foundation, and the counterweight module 3 is connected to the load-bearing frame 13.

[0027] By clearly dividing the reinforcement frame into a connecting frame 11, a clamping frame 12, and a load-bearing frame 13 with different functions, a clear and efficient mechanical transmission and fixing system is constructed. The connecting frame 11, by tightly fitting against the side wall of the exposed short column 100 of the tower foundation, achieves initial positioning and stable contact between the reinforcement frame and the foundation, providing a stable support benchmark for the entire device. The clamping frame 12 is located at the upper end of the connecting frame 11 and directly clamps against the upper surface of the exposed short column 100 of the tower foundation. This design cleverly utilizes the load-bearing capacity of the top of the short column, applying vertical pressure to firmly lock the reinforcement frame to the foundation, effectively preventing the reinforcement device from floating or shifting when the tower is subjected to pull-out force, thus ensuring the reliability of the pull-out reinforcement. Meanwhile, the load-bearing frame 13 is located at the lower end of the connecting frame 11 and is specifically used to connect the counterweight module 3. This structural layout allows the gravity load generated by the counterweight module 3 to be evenly and stably transferred to the upper surface of the exposed short column 100 of the tower foundation through the load-bearing frame 13, the connecting frame 11, and finally the clamping frame 12. This transforms the counterweight load into effective downward pressure on the foundation, effectively counteracting the uplift force of the tower foundation. This clearly defined structural design not only enables modular installation of the reinforcement device, avoiding damage to the original foundation, but also ensures that the counterweight load acts stably and evenly on the foundation through a reasonable force transmission path design, significantly improving the reliability and construction efficiency of the uplift reinforcement. Specifically, the connecting frame 11 ensures lateral stability, the clamping frame 12 provides vertical locking, and the load-bearing frame 13 efficiently introduces the counterweight load required for uplift resistance. Overall, this solution effectively solves the problems of unstable connection between the reinforcement frame and the short column, unclear load transmission path, and insufficient structural stability, providing a structurally reasonable, efficient, and easy-to-implement solution for uplift reinforcement of transmission tower foundations.

[0028] Furthermore, the connecting frame 11, the pressing frame 12, and the load-bearing frame 13 are integrated into one piece.

[0029] During the pull-out reinforcement process, this integrated design ensures a high degree of load continuity along the transmission path, avoiding localized structural deformation caused by fatigue or failure of connectors. Specifically, when the load of the counterweight module 3 is introduced through the load-bearing frame 13, the load is uniformly and unimpededly transmitted to the connecting frame 11 and the clamping frame 12. The connecting frame 11 is tightly fitted to the side wall of the exposed short column 100 of the tower foundation, while the clamping frame 12 is pressed against the upper surface of the exposed short column 100 of the tower foundation. The integrated structure allows the counterweight load to be converted into downward pressure on the foundation more evenly and directly, thereby significantly improving the overall stiffness and pull-out resistance of the reinforcement device. This design not only simplifies the on-site installation process and reduces structural hazards caused by assembly errors, but also improves the durability of the device in harsh environments through structural integration, ensuring the long-term stability of the pull-out reinforcement effect. It effectively solves the problems of loose connections, stress concentration, or uneven structural stiffness, thereby ensuring the reliability and stability of the overall pull-out reinforcement.

[0030] Furthermore, the counterweight module 3 is a counterweight pool connected to the load-bearing frame 13.

[0031] The counterweight module 3 is specifically designed as a counterweight pool connected to the load-bearing frame 13. This application provides a modular and flexibly adjustable counterweight carrier. This counterweight pool allows construction personnel to fill it with materials of different weights, such as sand, concrete blocks, or metal counterweights, according to the actual pull-out force requirements on site, thereby achieving precise increases or decreases in load. This design avoids the cumbersome construction, long construction period, and damage to the original foundation short columns caused by traditional concrete ring beam pouring, significantly improving the convenience and efficiency of construction. Simultaneously, the weight of the counterweight pool is directly and evenly transferred to the exposed short columns 100 of the tower foundation through the load-bearing frame 13, ensuring effective balance and introduction of pull-out force, thereby enhancing the pull-out resistance of the transmission tower foundation. Furthermore, as a functional extension of the load-bearing frame 13, the counterweight pool enables the entire reinforcement device to maintain a compact structure while possessing strong environmental adaptability, effectively coping with changes in pull-out force under different weather conditions, providing a stable and reliable pull-out reinforcement effect for the transmission tower foundation.

[0032] Furthermore, the number of the reinforcing frame groups 1 is four, and they are respectively installed on the four sides of the exposed short column 100 of the tower foundation.

[0033] By limiting the number of reinforcement frame groups 1 to four and placing them on the four side walls of the exposed short column 100 of the tower foundation, this application achieves comprehensive and balanced enclosure of the exposed short column 100 of the tower foundation. This four-point symmetrical arrangement allows the pull-out load generated by the counterweight module 3 to be evenly transferred to each side of the exposed short column 100 of the tower foundation through the four reinforcement frame groups 1. This effectively avoids local stress concentration caused by improper arrangement or insufficient number of reinforcement frame groups 1, thereby significantly improving the connection stability between the entire reinforcement device and the original foundation. Due to the uniform load introduction, the exposed short column 100 of the tower foundation can obtain a more balanced and stable reaction force when subjected to pull-out force, thereby enhancing the overall reliability of the pull-out reinforcement and effectively solving the problem of uneven load distribution affecting the stability of the reinforcement.

[0034] Furthermore, the upper end of the exposed short column 100 of the tower foundation is also provided with a tower foundation protective cap 101, and the top limiting connection structure 2 is respectively disposed around the tower foundation protective cap 101.

[0035] By installing a tower foundation protective cap 101 at the upper end of the exposed short column 100 of the tower foundation and designing the top limiting connection structure 2 in an avoidance manner, good compatibility between the reinforcement device and the existing foundation protection facilities is achieved. This not only ensures that the top limiting connection structure 2, while playing a lateral restraint role and ensuring the stability of the reinforcement frame 1, will not physically collide or squeeze with the tower foundation protective cap 101, thus avoiding the risk of damaging the original protection facilities due to the installation of the reinforcement device. This design allows the reinforcement device to adapt to different foundation configurations and complete the installation without removing or damaging the tower foundation protective cap 101, significantly improving construction efficiency, reducing construction difficulty and cost, and effectively protecting the integrity and service life of the tower foundation. At the same time, since the top limiting connection structure 2 can function without obstruction, it also further ensures the pull-out reinforcement effect of the entire reinforcement device.

[0036] In summary, after installation, this application forms an overall frame around the exposed short column 100 of the tower foundation. When the tower foundation is subjected to an upward pull-out force, the clamping frame 12 at the upper end of the reinforcement frame group 1 directly applies the downward load provided by the counterweight module 3 to the upper surface of the exposed short column 100 of the tower foundation. The top limiting connection structure 2 and the bottom limiting connection structure 4 work together to connect the various reinforcement frame groups 1 into a whole, preventing the reinforcement frame groups 1 from overturning or shifting laterally under the pull-out force, and ensuring that the counterweight load can be stably introduced into the exposed short column 100 of the tower foundation. Compared with the concrete ring beam reinforcement method, this device does not require the original foundation to undergo processes such as damaged rebar installation, formwork, rebar tying, concrete pouring, and curing, shortening the construction cycle and reducing the construction difficulty. Since the load acts directly on the upper surface of the foundation short column and is evenly introduced through the reinforcement frame group 1, the influence of the ring beam stiffness on the effect of balancing the pull-out force is avoided, improving the efficiency and reliability of the pull-out reinforcement. The entire reinforcement process does not damage the original structure, and the counterweight can be increased or decreased as needed, making it adaptable and maintainable.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structure made using the contents of this utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for reinforcing the uplift foundation of a power transmission tower, characterized in that, The utility model relates to a tower foundation reinforcing structure, including: a plurality of reinforcing frame groups (1) arranged around the tower foundation protruding short column (100), the upper end of which is pressed on the upper surface of the tower foundation protruding short column (100); a plurality of top limiting connection structures (2) respectively arranged between the opposite two reinforcing frame groups (1); a plurality of counterweight modules (3) respectively arranged on one side of the lower end of the reinforcing frame group (1), which can increase or decrease the load, wherein the load on the counterweight module (3) is evenly introduced into the tower foundation protruding short column (100) through the reinforcing frame group (1) to play a role of anti-pulling reinforcement.

2. The uplift-resistant foundation reinforcing device for a power transmission tower according to claim 1, characterized in that: A bottom limiting connection structure (4) is further arranged between the lower ends of the reinforcing frame groups (1).

3. The uplift-resistant foundation reinforcing device for a power transmission tower according to claim 2, characterized in that: The bottom limiting connection structure (4) includes an elastic binding belt (41) arranged between the lower ends of the reinforcing frame groups (1), and a press-fit buckle (42) arranged on the elastic binding belt (41).

4. The uplift-resistant foundation reinforcing device for a power transmission tower according to claim 1, characterized in that: The top limiting connection structure (2) includes a screw (21) arranged between the opposite two reinforcing frame groups (1), and a connecting rod (22) extending from both ends of the screw (21) and respectively connected to the opposite two reinforcing frame groups (1).

5. The uplift-resistant foundation reinforcement device for a power transmission tower according to claim 1, characterized in that: The reinforcing frame group (1) includes reinforcing frames respectively arranged at both ends of the side wall of the tower foundation protruding short column (100), the reinforcing frame includes a connecting frame body (11) attached to the side wall of the tower foundation protruding short column (100), a pressing frame body (12) arranged at the upper end of the connecting frame body (11), and a bearing frame body (13) arranged at the lower end of the connecting frame body (11), the pressing frame body (12) is pressed on the upper surface of the tower foundation protruding short column (100), and the counterweight module (3) is connected to the bearing frame body (13).

6. A uplift resistance foundation reinforcement device for a power transmission tower according to claim 5, characterized in that: The connecting frame body (11), the pressing frame body (12), and the bearing frame body (13) are integrally arranged.

7. The uplift-resistant foundation reinforcement device for a power transmission tower according to claim 5, characterized in that: The counterweight module (3) is a counterweight pool connected to the bearing frame body (13).

8. The uplift-resistant foundation reinforcement device for a power transmission tower according to claim 1, characterized in that: The number of reinforcing frame groups (1) is four, and they are respectively arranged on the four side walls of the tower foundation protruding short column (100).

9. The uplift-resistant foundation reinforcement device for a power transmission tower according to claim 1, characterized in that: The upper end of the tower foundation protruding short column (100) is further provided with a tower foundation protection cap (101), and the top limiting connection structure (2) is arranged on the side of the tower foundation protection cap (101).

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