Power transmission line tangent tower stay wire fixing device and method based on idle wheel anchor method

Abstract

The invention belongs to the technical field of power transmission lines, and particularly relates to a power transmission line tangent tower stay wire fixing device and method based on an idle wheel anchor method. The method specifically comprises the steps that a pulley block is arranged on a tangent tower, a wire and a ground wire are borne through wheels respectively, one end of a stay wire assembly is connected with the wire or the ground wire through a wire clamping device, the other end of the stay wire assembly is connected with a concrete stay wire disc through standard connecting components such as an NLY type wire clamp, a triangular hanging plate and a U-shaped hanging ring, and a complete wheel-passing anchor force transmission closed loop is formed. During construction, a bottom-up and left-right alternating wire translation mode is adopted, and uniform transmission and balance of tension are achieved in cooperation with the stay wire assemblies arranged in a layered mode and precise pre-tightening force control. Tension steering is achieved through a closed-loop structure, the load bearing capacity of an anchoring system is improved, it is ensured that all wires are evenly stressed through layered matched stay wire configuration, the installation efficiency and the system weather resistance are improved through standardized components and preservative treatment, and the safety and stability of a power transmission line can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of power transmission lines, and particularly relates to a power transmission line straight tower stay fixing device and method based on a through-wheel anchor method. BACKGROUND

[0002] In the construction and modification of power transmission lines, the fixing of the straight tower stay is a core link for ensuring construction safety, and its role is to balance the tension of the conductor and prevent the conductor from swinging or falling. The existing stay fixing technology mainly relies on the traction fixing of the total anchor vehicle or direct anchoring, and has many technical defects: first, the traditional anchoring method lacks an effective tension turning and uniform transmission mechanism, the stay arrangement is unreasonable, resulting in uneven force on the conductor and poor tension balance effect; second, the corrosion resistance of the stay and the connecting component is insufficient, and they are easily corroded when exposed to the outdoor environment for a long time, affecting the structural stability and service life; third, the stay disc structure design has poor adaptability, limited bearing capacity, and non-standard installation process, making it difficult to meet the stress requirements of complex construction scenes; fourth, the construction process lacks standardization, the operation is difficult, the construction efficiency is low, and the safety risk is high.

[0003] More importantly, there is no semi-permanent and permanent stay solution for straight towers in the existing technology, and the present application first applies the through-wheel anchor method to the fixing of the straight tower stay. The traditional through-wheel anchor is only used for temporary conductor traction, and the angle needs to be strictly controlled, which cannot form a synergy with the fixing of the straight tower stay, resulting in the technical bottleneck of uneven tension transmission and insufficient stability in the fixing of the straight tower stay. Therefore, an innovative technical method is urgently needed to break through the limitations of traditional technology and achieve efficient, stable and safe fixing of the straight tower stay. SUMMARY

[0004] The present application provides a power transmission line straight tower stay fixing device and method based on a through-wheel anchor method to solve the technical problems of the existing technology, such as the lack of effective tension turning and uniform transmission mechanism in the traditional anchoring method, the unreasonable stay arrangement, the uneven force on the conductor, and the poor tension balance effect.

[0005] In order to achieve the above-mentioned purposes, the present application adopts the following technical solutions: A power transmission line straight tower through-wheel anchor fixing device, a pulley block is arranged on the straight tower, the conductor and the ground wire are arranged in the wheel groove of the pulley block, the conductor and the ground wire are connected to the corresponding stay assembly at one end, the other end of the stay assembly is connected to the stay disc through a connecting component, and the stay disc is arranged in a foundation pit on the ground of the anchor point; the connecting component includes an NLY clamp and a U-shaped hanging ring, the NLY clamp is connected to one end of the U-shaped hanging ring, and the other end of the U-shaped hanging ring is connected to the stay disc; the other end of the stay assembly is in the clamp cavity of the NLY clamp, the clamp cavity fastens the stay assembly, and the pulley block, the stay assembly, the connecting component and the stay disc form a through-wheel anchor force transmission closed loop.

[0006] The guide wire comprises an upper guide wire, a middle guide wire, a lower guide wire and a ground wire, and the pull wire assembly comprises an upper guide wire pull wire, a middle guide wire pull wire, a lower guide wire pull wire and a ground wire pull wire, and the upper guide wire, the middle guide wire, the lower guide wire and the ground wire are respectively connected with the upper guide wire pull wire, the middle guide wire pull wire, the lower guide wire pull wire and the ground wire pull wire.

[0007] The upper guide wire pull wire, the middle guide wire pull wire and the lower guide wire pull wire are each 2, and the ground wire pull wire is 1; each guide wire corresponds to a group of two temporary pull wires, the pre-tightening force of a single pull wire is 21KN, and the group pre-tightening force is 42KN when two pull wires are synchronously tensioned; the pre-tightening force of a single ground wire pull wire is 16KN.

[0008] The pull ring is fixed to the pull wire disc at one end, and the other end is welded and fixed to the lower end of the pull wire rod, and the upper end of the pull wire rod is connected with the connecting member.

[0009] The welding seam thickness after the pull ring and the pull wire rod are welded is not less than the diameter of the pull wire rod.

[0010] The pull wire disc is a C35 concrete prefabricated structure, and the pull wire disc is internally provided with a longitudinal and transverse steel mesh, which comprises 4 main steels with a specification of 14mm, 8 distribution steels with a specification of 8mm and 2 short steels with a specification of 14mm.

[0011] The length of the main steel is 1397mm, the length of the distribution steel is 700mm, and the length of the short steel is 130mm; the main steel, the distribution steel and the short steel are bound to form the longitudinal and transverse steel mesh, and the pull ring is spot-welded and fixed to the short steel.

[0012] The connecting member adopts a standardized hardware component, and comprises an NLY type wire clamp, a triangular hanging plate and a U-shaped hanging ring; the upper end of the pull wire rod is hinged to the triangular hanging plate through the U-shaped hanging ring; the connecting holes of the two sides of the triangular hanging plate are respectively connected with the NLY type wire clamp through the U-shaped hanging ring; the end of the pull wire assembly is inserted into the wire clamp chamber of the NLY type wire clamp, and the wire clamp chamber fastens the pull wire assembly.

[0013] The pull wire assembly is a steel strand, and the surface of the steel strand is coated with two layers of H01-19 iron red epoxy fat primer and two layers of H01-6 asphalt finish, and the thickness of the asphalt finish is not less than 0.1mm.

[0014] A construction method of a straight tower over-wheel anchor fixing device of a power transmission line, comprising the following steps: The pulley set is installed under the original conductor suspension string of the straight tower, and the conductor and the ground wire are moved to the pulley set alternately from bottom to top and left to right, so that the conductor and the ground wire are matched with the pulley set to bear; one end of the stay wire assembly is connected with the corresponding conductor or ground wire through the wire clamp; the other end of the stay wire assembly is fixed in the wire clamp chamber of the NLY wire clamp, the NLY wire clamp is connected with one end of the U-shaped hanging ring, and the other end of the U-shaped hanging ring is connected with the stay wire disc; the stay wire disc is arranged in the pre-set foundation pit on the ground of the anchor point and is fixed, so that the pulley set, the stay wire assembly, the connecting member and the stay wire disc form a closed loop of over-wheel anchor force transmission, and the tension load of the conductor and the ground wire is transmitted through the closed loop.

[0015] Compared with the prior art, the present application has the following beneficial effects: The design of the pulley set, the stay wire assembly, the connecting member and the stay wire disc forming a closed loop of over-wheel anchor force transmission can realize the tension turning of the conductor and the ground wire through the pulley set, so that the load is stably transmitted to the stay wire assembly, the conductor is not directly bent under stress, the continuity and uniformity of tension transmission are ensured, and the load bearing capacity of the overall anchoring system is improved.

[0016] Further, the present application matches the stay wire assembly to the upper, middle and lower conductors and ground wires in layers, and adopts differentiated number and precise pre-tightening force configuration, which can precisely adapt to the tension requirements of conductors at different levels. The upper conductor stay wire, the middle conductor stay wire and the lower conductor stay wire are two in each group, and the ground wire stay wire is one in each group. One conductor corresponds to two temporary stay wires, the pre-tightening force of a single stay wire is 21KN, the pre-tightening force of two stay wires is 42KN when they are synchronously tensioned, and the pre-tightening force of a single ground wire stay wire is 16KN, which ensures that the stress of conductors at different levels is uniform and improves the tension balance effect of the overall line.

[0017] Further, the present application matches the stay wire assembly to the upper, middle and lower conductors and ground wires in layers, and adopts differentiated number and precise pre-tightening force configuration, which can precisely adapt to the tension requirements of conductors at different levels. The upper conductor stay wire, the middle conductor stay wire and the lower conductor stay wire are two in each group, and the ground wire stay wire is one in each group. One conductor corresponds to two temporary stay wires, the pre-tightening force of a single stay wire is 21KN, the pre-tightening force of two stay wires is 42KN when they are synchronously tensioned, and the pre-tightening force of a single ground wire stay wire is 16KN, which ensures that the stress of conductors at different levels is uniform and improves the tension balance effect of the overall line.

[0018] Further, the present application adopts the standardized hinged connecting component composed of the NLY type wire clamp triangular hanging plate and the U type hanging ring, which can improve the construction efficiency on the one hand due to the strong versatility and convenient installation of the standardized components, and on the other hand, the hinged structure of the triangular hanging plate and the U type hanging ring can adapt to the angle change of the stay wire, effectively disperse stress concentration, and improve the reliability and fatigue resistance of the connecting node.

[0019] Further, the present application can form a dense corrosion protection layer by brushing two layers of iron red epoxy fat primer and two layers of asphalt finish on the surface of the steel strand stay assembly, the thickness of the asphalt finish is not less than 0.1mm, which can effectively resist outdoor corrosion environment, significantly improve the weather resistance and service life of the stay assembly, and reduce the long-term maintenance cost.

[0020] Further, the present application can avoid uneven stress or damage of the wire during the displacement process by adopting the wire and ground wire translation installation process from bottom to top and left to right alternately, which can ensure the structural integrity of the wire and improve the construction efficiency and safety. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The side view is set for the stay wire of the straight-line tower stay fixing device based on the over-wheel anchor method in the embodiment of the present application; Figure 2 The plan view is set for the stay wire of the straight-line tower stay fixing device based on the over-wheel anchor method in the embodiment of the present application; Figure 3 The structural schematic diagram of the connecting component and the stay wire disc in the embodiment of the present application is shown; Figure 4 The stay wire disc embedding depth and arrangement schematic diagram in the embodiment of the present application is shown. DETAILED DESCRIPTION

[0022] In order to further understand the content of the present application, the present application is described in detail below in combination with the drawings and specific embodiments. It should be understood that the embodiments are only used to explain the present application but not to limit the present application.

[0023] The embodiments of the present application are described in detail below in combination with the drawings.

[0024] Embodiment 1 The present embodiment proposes a straight-line tower stay fixing device based on the over-wheel anchor method, as shown in Figure 1 and Figure 2As shown, including the conductor, ground wire and stay assembly, the conductor includes the upper conductor, the middle conductor, the lower conductor and the ground wire, the upper conductor, the middle conductor, the lower conductor and the ground wire are supported on the straight tower, the pulley block is installed under the original conductor suspension string of the straight tower, the conductor and the ground wire are transferred to the corresponding pulley block from bottom to top and left to right alternately, and are respectively arranged in the wheel groove of the corresponding pulley block, so that the over-wheel support of the conductor and the ground wire is realized. The conductor and the ground wire are connected with the stay assembly respectively through the wire clamp, so as to ensure firm connection and not damage the conductor, and to construct the over-wheel anchor force transmission closed loop; the stay assembly includes the upper conductor stay, the middle conductor stay, the lower conductor stay and the ground wire stay, and the upper conductor, the middle conductor, the lower conductor and the ground wire are respectively connected with the upper conductor stay, the middle conductor stay, the lower conductor stay and the ground wire stay. In the stay assembly, the upper conductor stay, the middle conductor stay and the lower conductor stay are each 2, and the ground wire stay is 1; the stay assembly adopts 1*19-13.0-1370-B (GJ-100) type steel strand, each conductor corresponds to a group of two temporary stays, the pre-tightening force of a single stay is 21KN, and the pre-tightening force of the group is 42KN when two stays are synchronously tensioned; the pre-tightening force of the ground wire stay is 16KN; the stay assembly is fixedly connected with the stay disc designed for the anchor point ground wire.

[0025] The stay disc is a C35 concrete prefabricated structure, the C35 concrete has high strength and good durability, and can provide a reliable bearing foundation for the over-wheel anchor stress. The stay disc is internally provided with a longitudinal and transverse steel mesh, the longitudinal and transverse steel mesh is internally provided with 4 main steels with a specification of 14mm, 8 distribution steels with a specification of 8mm and 2 short steels with a specification of 14mm, wherein the length of the main steel is 1397mm, the length of the distribution steel is 700mm, and the length of the short steel is 130mm; the steel mesh is uniformly arranged and longitudinally and transversely electrically welded, so as to enhance the structural strength of the stay disc and ensure that the stay disc can bear the concentrated load in the over-wheel anchor process. The stay disc further includes a pull ring and a stay rod, one end of the pull ring is fixed to the stay disc, the other end of the pull ring is welded and fixed to the lower end of the stay rod, and a bottom force anchoring body of the stay system is formed; the pull ring is processed by a round steel with a specification of 40mm, the welding seam after the pull ring is welded with the stay rod is not less than the diameter of the stay rod, so as to ensure the connection strength and avoid connection failure in the over-wheel anchor tension transmission process; and the pull ring and the stay rod after welding need to be subjected to hot-dip galvanizing treatment, and the longitudinal and transverse steel mesh is bound and fixed with the pull ring.

[0026] The upper end of the stay rod is connected with a connecting member; the connecting member adopts a standardized hardware component, including an NLY type wire clamp, a triangular hanging plate and a U-shaped hanging ring, and the NLY type wire clamp, the triangular hanging plate and the U-shaped hanging ring plate jointly constitute a wheel anchor force transmission path; the NLY type wire clamp is used for fixing the conductor stay wire, the wire clamp chamber of the NLY type wire clamp firmly clamps the conductor stay wire and does not damage the conductor stay wire, and can ensure the reliability of the wheel anchor tension transmission; the triangular hanging plate cooperates with the U-shaped hanging ring to realize reliable connection of the branch stay wire and the pulley block, and is a core node of the wheel anchor turning transmission; the U-shaped hanging ring is used as a universal connecting piece for connecting the stay wire and the stay wire disc, the stay wire and other hardware, and is convenient to disassemble and assemble, and meets the on-site operation requirements of the wheel anchor construction. In the embodiment, the connecting member specifically adopts an NLY-100GB type wire clamp, an L-21J-120 / 500 type triangular hanging plate, a U-1085 type U-shaped hanging ring, a U-1695 type U-shaped hanging ring, an EB-16 / 21-100 type ring shaft hanging plate and a P-21120 type parallel hanging plate; specifically as shown in Figure 3 The upper end of the stay rod is connected with a connecting member; the connecting member adopts a standardized hardware component, including an NLY type wire clamp, a triangular hanging plate and a U-shaped hanging ring, and the NLY type wire clamp, the triangular hanging plate and the U-shaped hanging ring plate jointly constitute a wheel anchor force transmission path; the NLY type wire clamp is used for fixing the conductor stay wire, the wire clamp chamber of the NLY type wire clamp firmly clamps the conductor stay wire and does not damage the conductor stay wire, and can ensure the reliability of the wheel anchor tension transmission; the triangular hanging plate cooperates with the U-shaped hanging ring to realize reliable connection of the branch stay wire and the pulley block, and is a core node of the wheel anchor turning transmission; the U-shaped hanging ring is used as a universal connecting piece for connecting the stay wire and the stay wire disc, the stay wire and other hardware, and is convenient to disassemble and assemble, and meets the on-site operation requirements of the wheel anchor construction. In the embodiment, the connecting member specifically adopts an NLY-100GB type wire clamp, an L-21J-120 / 500 type triangular hanging plate, a U-1085 type U-shaped hanging ring, a U-1695 type U-shaped hanging ring, an EB-16 / 21-100 type ring shaft hanging plate and a P-21120 type parallel hanging plate; specifically as shown in

[0027] Embodiment 2 Based on the stay wire fixing device for the straight-line tower of the power transmission line based on the wheel anchor method proposed in Embodiment 1, the embodiment proposes a construction method of the stay wire fixing device for the straight-line tower of the power transmission line based on the wheel anchor method. Based on the stay wire fixing device for the straight-line tower of the power transmission line, the straight-line tower stay wire is fixed by the wheel anchor method for the first time, and the specific implementation method is as follows: First, the pull rod and the pull ring on the pull line disc are welded according to the design requirements, the welding process strictly follows the Steel Structure Welding and Acceptance Regulations (JGJ18-2012), and after the welding is completed, the weld is subjected to non-destructive testing, and after the weld passes the testing, the pull rod and the pull ring are subjected to hot-dip galvanizing treatment to ensure the corrosion resistance and structural strength of the connection part. Then, 4 main steel bars of 14 mm, 8 distribution steel bars of 8 mm and 2 short steel bars of 14 mm are bound to form a longitudinal and transverse steel bar mesh, the short steel bars are fixed to the main steel bars by spot welding after being fixed to the pull ring, and the main steel bars are firmly bound to ensure the accurate position of the longitudinal and transverse steel bar mesh and enhance the load-bearing capacity of the pull line disc. Finally, C35 concrete is poured and compacted, and after curing, the concrete strength reaches the design requirements, providing a solid foundation for the over-wheel anchor stress, the size of the pull line disc is designed to be 1400 mm long, 800 mm wide and 400 mm thick, and the buried depth is implemented according to the design requirements to ensure the stability after installation and prevent displacement during the over-wheel anchor tensioning process.

[0028] The 1*19-13.0-1370-B (GJ-100) type steel strand that meets the specifications is selected as the pull line assembly, which is cut according to the design length and then the surface impurities and rust are removed; H01-19 iron red epoxy fat primer is applied on the surface of the steel strand in two layers, and each layer needs to be dried to the specified state after being applied; after the iron red epoxy fat primer is dry, H01-6 asphalt finish is applied in two layers to ensure that the thickness of the asphalt finish is not less than 0.1 mm, the coating is uniform, bubble-free and free of missed coating, and the iron red epoxy fat primer and the asphalt finish form a double corrosion protection, so that the pull line assembly can adapt to the outdoor over-wheel anchor construction environment.

[0029] According to the construction drawings, the buried depth of the pull line disc and the layout position of the pull line disc on the anchor point ground line are determined, the foundation pit is excavated, and the size of the foundation pit is adjusted according to the size of the pull line disc and the geological conditions. The pull line disc is placed in the foundation pit, the levelness and orientation of the pull line disc are adjusted to ensure that the design requirements are met, then the soil is backfilled layer by layer and compacted to ensure that the pull line disc is installed stably and there is no risk of displacement, providing reliable support for the over-wheel anchor tensioning process.

[0030] The pulley block is installed under the original conductor suspension string of the straight-line tower, and the installation position and angle of the pulley block strictly match the tension transfer path of the over-wheel anchor, ensuring that when the conductor and ground wire migrate through the pulley block, the tension direction and the pull line stress direction form precise coordination, which is the key operation of the over-wheel anchor method in the pull line of the straight-line tower. Then, the conductor and ground wire are moved to the pulley block one by one from bottom to top and left to right, realizing the over-wheel support of the conductor and ground wire and preparing for tension transfer. The conductor and ground wire are connected to one end of the pull line assembly through the wire clamp, and when the wire clamp is installed, it is ensured to maintain a sufficient distance from the conductor and ground wire protection device to avoid damaging the conductor and ground wire, forming a complete over-wheel anchor force transfer closed loop to ensure that the tension can be smoothly transferred from the pull line assembly to the conductor and ground wire.

[0031] The connecting member described in Example 1 is connected with the pull ring of the pull line disc, and the pull line assembly is connected with the pull line disc through the connecting member, as shown in Figure 4 The anchor line clamping angle between the pull line assembly and the ground wire at the anchor point is arranged at the design angle, the other end of the pull line assembly is connected with the pull line disc, and the installation of the upper conductor pull line, the middle conductor pull line, the lower conductor pull line and the ground wire pull line with the pull line disc is sequentially completed. During the installation process, it is ensured that each connection part is fastened and there is no loosening phenomenon, the arrangement direction of the pull line assembly is adapted to the running direction of the conductor and the ground wire and the installation position of the pulley block, so as to ensure the smooth transmission path of the over-wheel anchor tension.

[0032] The verified tensioning equipment is adopted, and the pull line is tensioned by using the synchronous tensioning process. For two temporary pull lines of each phase conductor, a pre-tightening force of 21KN is applied; for the ground wire pull line, a pre-tightening force of 16KN is applied. During the tensioning process, the pre-tightening force is monitored in real time by using a force sensor, and the stress state of the pull line, the displacement of the pull line disc and the tension transmission of the conductor and ground wire are observed, the pre-tightening force of the pull line is uniformly transmitted to the conductor and ground wire through the steering transmission of the pulley block, the dynamic balance of the tension of the straight-line tower pull line and the conductor and ground wire is realized, and the technical limitation that the traditional straight-line tower pull line cannot realize uniform stress through the over-wheel steering is broken. While slowly tightening the pull line, the conductor and ground wire on the anchor line side are simultaneously and uniformly prevented from loosening, when the pull line reaches the designed pre-tightening force, the tightening is stopped and the pull line is locked, the conductor and ground wire on the anchor line side are simultaneously removed, and the over-wheel anchor pull line fixing construction of the straight-line tower is completed.

[0033] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand. The above is only to illustrate the technical idea of the present application, and cannot limit the protection scope of the present application, and any modification made on the basis of the technical solutions according to the present application falls within the protection scope of the claims of the present application.

Claims

1. A wheel-anchor fixing device for a straight-line tower of a transmission line, characterized in that, The system includes a pulley system mounted on a straight-line tower. The conductor and ground wire are respectively laid within the grooves of the pulley system. One end of each conductor and ground wire is connected to a corresponding guy wire assembly. The other end of the guy wire assembly is connected to a guy wire reel via a connecting member. The guy wire reel is positioned in a pit in the ground at the anchor point. The connecting member includes an NLY clamp and a U-shaped hanging ring. One end of the NLY clamp is connected to the U-shaped hanging ring, and the other end of the U-shaped hanging ring is connected to the guy wire reel. The other end of the guy wire assembly is located within the clamp chamber of the NLY clamp, which secures the guy wire assembly. The pulley system, guy wire assembly, connecting member, and guy wire reel form a closed loop for transmitting anchor force.

2. The transmission line straight tower wheel anchor fixing device according to claim 1, characterized in that, The conductors include an upper conductor, a middle conductor, a lower conductor, and a ground wire. The guy wire assembly includes an upper conductor guy wire, a middle conductor guy wire, a lower conductor guy wire, and a ground wire guy wire. The upper conductor, middle conductor, lower conductor, and ground wire are respectively connected to the upper conductor guy wire, the middle conductor guy wire, the lower conductor guy wire, and the ground wire guy wire.

3. The transmission line straight-line tower wheel anchor fixing device according to claim 2, characterized in that, There are two guy wires in each group for the upper conductor, middle conductor, and lower conductor, and one guy wire in each group for the ground conductor. Each conductor corresponds to a group of two temporary guy wires. The preload of a single guy wire is 21KN, and the preload of the group is 42KN when the two guy wires are tensioned simultaneously. The preload of a single ground wire guy wire is 16KN.

4. The transmission line straight-line tower wheel anchor fixing device according to claim 1, characterized in that, The pull reel is equipped with a pull ring and a pull bar. One end of the pull ring is fixed to the pull reel, and the other end of the pull ring is welded and fixed to the lower end of the pull bar. The upper end of the pull bar is connected to the connecting component.

5. The transmission line straight-line tower wheel anchor fixing device according to claim 4, characterized in that, The thickness of the weld after the pull ring and the pull bar are welded together shall not be less than the diameter of the pull bar.

6. The transmission line straight-line tower wheel anchor fixing device according to claim 4, characterized in that, The wire guide plate is a precast C35 concrete structure. The wire guide plate has a built-in longitudinal and transverse steel mesh, which includes 4 main steel bars with a specification of 14mm, 8 distribution steel bars with a specification of 8mm, and 2 short bars with a specification of 14mm.

7. A wheel-anchor fixing device for a straight-line tower of a transmission line according to claim 6, characterized in that, The main reinforcing bars are 1397mm long, the distribution reinforcing bars are 700mm long, and the short reinforcing bars are 130mm long. The main reinforcing bars, distribution reinforcing bars, and short reinforcing bars are tied together to form a longitudinal and transverse reinforcing bar mesh, and the tie rings are spot welded to the short reinforcing bars for fixation.

8. A wheel-anchor fixing device for a straight-line tower of a transmission line according to claim 4, characterized in that, The connecting component adopts standardized hardware parts, including an NLY type wire clamp, a triangular hanging plate and a U-shaped hanging ring. The upper end of the pull rod is hinged to the triangular hanging plate through the U-shaped hanging ring. The connecting holes on the two sides of the triangular hanging plate are respectively connected to the NLY type wire clamp through the U-shaped hanging ring. The end of the pull assembly is inserted into the wire clamp chamber of the NLY type wire clamp, and the wire clamp chamber fastens the pull assembly.

9. A wheel-anchor fixing device for a straight-line tower of a transmission line according to claim 1, characterized in that, The pull wire assembly is a steel strand. The surface of the steel strand is coated with two layers of H01-19 iron oxide red epoxy primer and two layers of H01-6 asphalt topcoat. The thickness of the asphalt topcoat is not less than 0.1mm.

10. A construction method for a wheel-passing anchor fixing device for a straight-line tower of a transmission line, based on any one of claims 1 to 9, characterized in that, Includes the following steps: Install pulley blocks under the original conductor suspension string of the straight-line tower. Move the conductors and ground wires one by one onto the pulley blocks from bottom to top and left to right, so that the conductors and ground wires cooperate with the pulley blocks to bear the load. Connect one end of the guy wire assembly to the corresponding conductor or ground wire through a wire clamp. Fix the other end of the guy wire assembly to the clamp cavity of the NLY clamp of the connecting member and tighten it. Connect one end of the NLY clamp to the U-shaped hanging ring, and connect the other end of the U-shaped hanging ring to the guy wire reel. Place the guy wire reel in the pre-set pit in the anchor point ground and fix it. Make the pulley block, guy wire assembly, connecting member and guy wire reel form a closed loop for transmitting the anchor force through the pulley. The tension load of the conductor and ground wire is transmitted through this closed loop.

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