Stay cable
By designing cable-stayed cables that include protective components and cable-strength monitoring components, the problem of cable-stayed cable corrosion in the external environment is solved, ensuring the stability of cable-stayed cables and the safety of bridge structure.
Patent Information
- Application Number
- CN202421182202.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-27
AI Technical Summary
The cable-stayed cable is exposed to external air environment for a long time and is susceptible to corrosion, resulting in changes in mechanical properties, reducing structural safety, and increasing maintenance difficulty.
A cable-stayed cable consisting of a cable-stayed cable body, an anchor assembly, a protective assembly and a cable-strength monitoring assembly are designed. The main beam end of the cable-stayed cable body is separated from the external environment through protective components to slow down the corrosion rate; the cable-stayed cable is installed between the bridge and the tower using anchor components; the cable-stayed cable monitoring component monitors cable-stayed cable changes in real time and provides analytical data.
It effectively slows down the corrosion speed at the main beam end of the cable-stayed cable, ensures that the cable-stayed cable maintains stable performance for a long time, and improves the safety of the bridge structure and the durability of the cable-stayed cable.
Smart Images
Figure CN222525171U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of stay cable construction, in particular to a stay cable. Background Art
[0002] The cable, also known as the stay cable or inclined cable, is the main load-bearing component of the cable-stayed bridge. The cable generally includes the cable body and the anchoring devices at both ends of the cable. The two ends of the cable are connected to the main beam of the cable-stayed bridge and the tower of the cable-stayed bridge through the anchoring devices at both ends of the cable, so as to directly transfer the weight of the main beam and the bridge deck of the cable-stayed bridge to the tower. The stress state of the cable has a decisive influence on the overall stability and safety of the bridge. The characteristics of the cable include light weight, high flexibility, and low damping. These characteristics make the cable easy to be affected by wind, rain and other loads or end movement during use, causing vibration. Therefore, the mechanical analysis of the cable plays an important role in bridge maintenance.
[0003] However, since the cable-stayed cables are exposed to the external air environment for a long time, they are susceptible to corrosion, which causes changes in the mechanical properties of the cables, resulting in reduced structural safety of the cables and increased difficulty in maintenance. Utility Model Content
[0004] In order to solve the defects of the prior art, the utility model provides a stay cable, which can ensure that the stay cable maintains stable performance for a long time, ensure the safety of the bridge structure, and improve the durability of the stay cable.
[0005] In order to solve the above technical problems, the utility model provides a stay cable, comprising:
[0006] Stay cable body;
[0007] Two groups of anchoring assemblies, one group of the anchoring assemblies is arranged at the main beam end of the inclined cable body, and the other group of the anchoring assemblies is arranged at the tower end of the inclined cable body;
[0008] A protection component is arranged at the main beam end of the inclined cable body, and the protection component is connected to one group of the anchoring components, and the protection component is used to separate the main beam end of the inclined cable body from the external environment;
[0009] A cable force monitoring component is arranged in one group of the anchoring components, and the cable force monitoring component is used to monitor the changes in the cable force of the inclined cable at the end of the main beam.
[0010] Wherein, the anchoring assembly comprises:
[0011] An anchor, wherein a first end of the anchor is provided with an anchor pad, and the anchor pad is used to fix the anchor to a bridge or a tower;
[0012] A cable guide tube, wherein the first end of the cable guide tube is sleeved on the main beam end or the cable tower end, the second end of the anchor is inserted into the second end of the cable guide tube, and the second end of the anchor is connected to the main beam end or the cable tower end;
[0013] A vibration damper is disposed at the first end of the cable guide tube, and the vibration damper is connected to the stay cable body.
[0014] Wherein, the cable force monitoring component comprises:
[0015] A pressure detection element is disposed between the anchor plate and the anchor, and is used to detect the pressure between the anchor plate and the anchor;
[0016] A magnetic flux detection element is arranged at the second end of the anchor, and is used to detect the change of magnetic flux rate between the anchor and the inclined cable body.
[0017] Wherein, the inclined cable body is made of galvanized steel wire rope body, and the tensile strength of the galvanized steel wire rope body is greater than or equal to 1770MPa.
[0018] Wherein, the protection component comprises:
[0019] A waterproof cover is sleeved on the main beam end of the inclined cable body, a first end of the waterproof cover is covered on the first end of the cable guide tube, and a second end of the waterproof cover is sealed and connected to the inclined cable body.
[0020] Wherein, a sealing ring is provided at the second end of the waterproof cover, the outer ring of the sealing ring abuts against the inner wall surface of the waterproof cover, and the inner ring of the sealing ring abuts against the outer wall surface of the inclined cable body;
[0021] Sealant is applied between the outer ring of the sealing ring and the inner wall surface of the waterproof cover, and between the inner ring of the sealing ring and the outer wall surface of the inclined cable body.
[0022] Wherein, the protection component also includes:
[0023] A protection tube is sleeved on the stay cable body and connected to the waterproof cover.
[0024] Wherein, a protective cover is arranged on the side of the anchor plate facing away from the inclined cable body, the protective cover is sealedly connected to the anchor plate, and the protective cover is arranged on the anchor.
[0025] Wherein, a PVF wrapping tape is provided on the surface of the inclined cable body.
[0026] Wherein, the surface of the inclined cable body is wound with an anti-vibration helical wire, and the anti-vibration helical wire is used to change the surface aerodynamic shape of the inclined cable body.
[0027] The implementation of this utility model has the following beneficial effects:
[0028] According to the stay cable provided in this embodiment, since the main beam end of the stay cable body is provided with a protective component, after the stay cable body is installed between the bridge and the tower using two sets of anchoring components, the main beam end of the stay cable body is separated from the external environment by the protective component, and a protective layer is formed at the main beam end of the stay cable body to prevent the main beam end of the stay cable body from direct contact with moisture or other chemicals in the external environment, thereby slowing down the speed at which the main beam end of the stay cable body is corroded and eroded.
[0029] At the same time, the cable force monitoring component is used to monitor the cable force changes at the main beam end in real time, and the cable force monitoring data of the cable at the main beam end of the cable body is obtained, so as to facilitate real-time analysis of the stress state and usage of the cable, provide accurate data support for bridge operation and maintenance, and ensure that the cable maintains stable performance for a long time, ensure the safety of the bridge structure, and improve the durability of the cable. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 It is a structural schematic diagram of the inclined cable provided by the embodiment of the utility model;
[0031] Figure 2 yes Figure 1 A schematic cross-sectional view of the structure along the section line AA;
[0032] Figure 3 yes Figure 1 A schematic diagram of the enlarged structure at B in the middle;
[0033] Figure 4 yes Figure 1 Schematic diagram of the enlarged structure at point C in the middle. DETAILED DESCRIPTION
[0034] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail with reference to the accompanying drawings. It is hereby stated that the directional words such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the utility model are only based on the accompanying drawings of the utility model, and are not specific limitations of the utility model.
[0035] The stay cable provided by the utility model can ensure that the stay cable maintains stable performance over a long period of time, ensure the safety of the bridge structure, and improve the durability of the stay cable.
[0036] In one embodiment of the present invention, Figure 1As shown, the cable-stayed cable comprises a cable body 1, two groups of anchoring assemblies 2, a protection assembly 3 and a cable force monitoring assembly 4. One group of anchoring assemblies 2 is arranged at the main beam end of the cable body 1, and the other group of anchoring assemblies 2 is arranged at the cable tower end of the cable body 1. The protection assembly 3 is arranged at the main beam end of the cable body 1, and the protection assembly 3 is connected to one group of anchoring assemblies 2. The protection assembly 3 is used to separate the main beam end of the cable body 1 from the external environment to avoid direct contact between the main beam end of the cable body 1 and the external environment, and to slow down the speed at which the cable body 1 is corroded and eroded. The cable force monitoring assembly 4 is arranged at one group of anchoring assemblies 2, and the cable force monitoring assembly 4 is used to monitor the cable force changes of the cable at the main beam end.
[0037] According to the stay cable provided by the embodiment of the utility model, since the main beam end of the stay cable body 1 is provided with a protective component 3, after the stay cable body 1 is installed between the bridge and the tower using two sets of anchoring components 2, the main beam end of the stay cable body 1 is separated from the external environment by the protective component 3, and a protective layer is formed at the main beam end of the stay cable body 1 to prevent the main beam end of the stay cable body 1 from direct contact with moisture or other chemicals in the external environment, thereby slowing down the speed at which the main beam end of the stay cable body 1 is corroded and eroded.
[0038] At the same time, the cable force monitoring component 4 is used to monitor the cable force changes at the main beam end in real time, and the cable force monitoring data of the cable at the main beam end of the cable body 1 is obtained, so as to facilitate real-time analysis of the stress state and usage of the cable, provide accurate data support for bridge operation and maintenance, and ensure that the cable maintains stable performance for a long time, ensure the safety of the bridge structure, and improve the durability of the cable.
[0039] In the embodiment of the present utility model, Figure 1 As shown, the anchor assembly 2 includes an anchor 21 and a cable guide tube 22. An anchor pad 211 is provided at the first end of the anchor 21, and the anchor pad 211 is used to fix the anchor 21 to a bridge or a tower, so as to fix both ends of the cable body 1 to the bridge or the tower. The first end of the cable guide tube 22 is sleeved on the main beam end or the cable tower end, so as to use the cable guide tube 22 to protect the main beam end and the cable tower end of the cable, and prevent the end of the cable from directly contacting the external environment.
[0040] The second end of the anchor 21 is inserted into the second end of the cable guide tube 22, and the second end of the anchor 21 is connected to the main beam end or the cable tower end. When the inclined cable is subjected to tension, the tension is transmitted to the anchor 21 through the inclined cable, and the anchor 21 is fixed to the bridge or tower through the anchor pad 211, stably transmitting the tension to the bridge or tower structure to ensure the overall safety and stability of the inclined cable body 1 and the bridge.
[0041] Specifically, the anchor 21 at the main beam end of the cable-stayed body 1 is a tensioning end anchor 21, and the tensioning end anchor 21 includes an anchor plate, an anchor pad 211, a clip and a spiral rib. During installation, the cable-stayed body 1 is fixed to the bridge through the tensioning end anchor 21. When the cable-stayed body 1 is subjected to tensioning force, the tensioning force is transmitted to the bridge through the tensioning end anchor 21, thereby realizing the tensioning force conduction of the cable-stayed body 1. The anchor 21 at the tower end of the cable-stayed body 1 is a fixed end anchor 21, through which the tower end of the cable-stayed body 1 is stably fixed to the tower, and the tension and prestress are transmitted to the tower structure through the fixed end anchor 21.
[0042] A vibration damper 23 is provided at the first end of the cable guide tube 22, and the vibration damper 23 is connected to the inclined cable body 1 so as to utilize the vibration damper 23 to absorb and reduce the vibration generated by the inclined cable body 1 when it is subjected to external force, thereby reducing the damage of the external vibration to the structure of the inclined cable body 1 and the bridge structure, and improving the overall performance and service life of the bridge.
[0043] It should be noted here that the specific selection of the vibration damper 23 depends on factors such as the vibration characteristics of the inclined cable, the structural form of the bridge, and the magnitude of the external force. The type and form of the vibration damper 23 can be selected according to actual needs.
[0044] Furthermore, if Figure 1 As shown, a protective cover 212 is provided on the side of the anchor plate 211 facing away from the inclined cable body 1 , and the protective cover 212 is sealed and connected to the anchor plate 211 , and the protective cover 212 is provided on the anchor 21 .
[0045] It can be understood that since the protective cover 212 is sealed and connected to the anchor plate 211, and the protective cover 212 is provided on the anchor 21, the anchor 21 is separated from the external environment by the protective cover 212, so that the anchor 21 will not be in direct contact with the external environment, so as to ensure the stability and reliability of the anchor 21, thereby slowing down the rate of corrosion and erosion of the anchor 21 and effectively extending the service life of the anchor 21.
[0046] In the embodiment of the present utility model, Figure 1 and Figure 4 As shown, the cable force monitoring assembly 4 includes a pressure detection element 41 and a magnetic flux detection element 42. The pressure detection element 41 is arranged between the anchor plate 211 and the anchor 21, and is used to detect the pressure between the anchor plate 211 and the anchor 21. The magnetic flux detection element 42 is arranged at the second end of the anchor 21, and is used to detect the change of magnetic flux between the anchor 21 and the cable body 1.
[0047] It can be understood that the pressure between the anchor plate 211 and the anchor 21 is detected by the pressure detection element 41, so as to obtain the tension force transmitted from the main beam end of the cable body 1 to the anchor plate 211, so as to detect and monitor the tension of the cable transmitted between the anchor 21 and the anchor plate 211.
[0048] At the same time, since the anchor 21 is generally made of ferromagnetic material, when the anchor 21 is subjected to an external load, the internal stress of the anchor 21 will change, resulting in a change in the magnetic permeability of the anchor 21. By measuring the change in magnetic flux between the anchor 21 and the cable body 1 through the magnetic flux detection element 42, the stress change between the anchor 21 and the cable body 1 can be indirectly reflected, so that the magnetic flux detection element 42 can be used to detect and monitor the cable tension conducted between the cable body 1 and the anchor 21.
[0049] By detecting and monitoring the cable tension transmitted between the cable body 1 and the anchor 21, and detecting and monitoring the cable tension transmitted between the anchor 21 and the anchor pad 211, when abnormal tension is detected in one of the cable positions, the corresponding position can be inspected and maintained to prevent structural damage, thereby ensuring the structural safety of the cable body 1.
[0050] Optionally, the pressure detection element 41 is a pressure sensor, and the magnetic flux detection element 42 is a magnetic flux sensor.
[0051] In the embodiment of the present utility model, Figure 2 As shown, the cable body 1 adopts a galvanized steel wire cable body 11, and the tensile strength of the galvanized steel wire cable body 11 is greater than or equal to 1770MPa. The corrosion resistance and durability of the galvanized steel wire cable body 11 are utilized to improve the safety factor and durability of the cable body 1, so that when the cable body 1 is exposed to moisture and chemical components of the external environment, the galvanized steel wire cable body 11 can also maintain its original strength and stability without obvious deformation or breakage, thereby improving the structural safety of the cable body 1.
[0052] In the embodiment of the present utility model, Figure 1 and Figure 3 As shown, the protection assembly 3 includes a waterproof cover 31. The waterproof cover 31 is sleeved on the main beam end of the inclined cable body 1, the first end of the waterproof cover 31 is covered on the first end of the cable guide tube 22, and the second end of the waterproof cover 31 is sealed and connected to the inclined cable body 1.
[0053] It can be understood that by providing a waterproof cover 31 at the main beam end of the cable body 1 and sealing the waterproof cover 31 with the cable body 1, the waterproof cover 31 can be used to separate the main beam end of the cable body 1 from the external environment, and prevent moisture from the external environment from entering the cable body 1 through the gap between the waterproof cover 31 and the cable body 1, thereby further enhancing the durability of the cable body 1, ensuring that the cable body 1 can maintain its original mechanical properties and appearance quality, and thus ensuring the safety and stability of the cable-stayed bridge.
[0054] At the same time, since the vibration damper 23 is disposed at the first end of the cable guide tube 22, the waterproof cover 31 can protect the vibration damper 23, extend the service life of the vibration damper 23, and ensure that it continues to provide an effective vibration damping effect.
[0055] Optionally, the waterproof cover 31 is made of stainless steel, so as to utilize the corrosion resistance and durability of the stainless steel to prevent the waterproof cover 31 from being corroded by water vapor in the external environment and causing the waterproof cover 31 to lose its function.
[0056] Specifically, in order to achieve a sealed connection between the waterproof cover 31 and the inclined cable body 1, a sealing ring is provided at the second end of the waterproof cover 31, the outer ring of the sealing ring abuts against the inner wall surface of the waterproof cover 31, and the inner ring of the sealing ring abuts against the outer wall surface of the inclined cable body 1.
[0057] It can be understood that the sealing ring is tightly attached to the inner wall surface of the waterproof cover 31 and the outer wall surface of the inclined cable body 1 to fill the small gap between the waterproof cover 31 and the inclined cable body 1, thereby preventing moisture from the external environment from penetrating into the interior of the inclined cable body 1 through the small gap, thereby ensuring that the main beam end of the inclined cable body 1 is separated from the external environment, so as to reduce the erosion of the inclined cable body 1 by moisture in the external environment during long-term use, thereby improving the durability of the inclined cable body 1.
[0058] Sealant is applied between the outer ring of the sealing ring and the inner wall of the waterproof cover 31, and between the inner ring of the sealing ring and the outer wall of the cable body 1, so as to further fill and seal the tiny gaps with the sealant, and further ensure that the waterproof cover 31 and the cable body 1 are completely sealed. Furthermore, the overall sealing effect between the waterproof cover 31 and the cable body 1 is enhanced through the coordinated sealing effect of the sealing ring and the sealant, and the safety and stability of the cable body 1 in harsh environments are effectively ensured.
[0059] Furthermore, if Figure 1 and Figure 3As shown, the protection assembly 3 further includes a protection tube 32. The protection tube 32 is sleeved on the inclined cable body 1, and the protection tube 32 is connected to the waterproof cover 31. Then, a protective layer is formed on the outer shell of the inclined cable body 1 by using the protection tube 32 and the waterproof cover 31, which further prevents the inclined cable body 1 from directly contacting the external environment, thereby further enhancing the waterproof and protection performance of the inclined cable body 1.
[0060] In the embodiment of the present utility model, Figure 2 As shown, the surface of the cable body 1 is provided with a PVF wrapping tape 12. The PVF wrapping tape 12 has excellent corrosion resistance and anti-deterioration effect. When the cable body 1 is repaired, the PVF wrapping tape 12 can fully block water vapor from entering the cable body 1, thereby protecting the outer shell of the cable body 1 and the steel wire body in the cable body 1.
[0061] In the embodiment of the present utility model, Figure 1 and Figure 2 As shown, the surface of the cable body 1 is wound with an anti-vibration spiral 13, which is used to change the surface aerodynamic shape of the cable body 1 to prevent the formation of rain lines on the surface of the cable body 1, thereby suppressing the vibration of the cable body 1 in windy and rainy weather, reducing the vibration amplitude of the cable body 1 in windy and rainy weather, and then improving the stability of the cable body 1 in windy and rainy weather.
[0062] The above is a preferred embodiment of the present utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present utility model.
Claims
1. A stay cable, characterized in that: include: Stay cable body; Two groups of anchoring assemblies, one group of the anchoring assemblies is arranged at the main beam end of the inclined cable body, and the other group of the anchoring assemblies is arranged at the tower end of the inclined cable body; A protection component is arranged at the main beam end of the inclined cable body, and the protection component is connected to one group of the anchoring components, and the protection component is used to separate the main beam end of the inclined cable body from the external environment; A cable force monitoring component is arranged in one group of the anchoring components, and the cable force monitoring component is used to monitor the changes in the cable force of the inclined cable at the end of the main beam.
2. The stay cable according to claim 1, characterized in that: The anchor assembly comprises: An anchor, wherein a first end of the anchor is provided with an anchor pad, and the anchor pad is used to fix the anchor to a bridge or a tower; A cable guide tube, wherein the first end of the cable guide tube is sleeved on the main beam end or the cable tower end, the second end of the anchor is inserted into the second end of the cable guide tube, and the second end of the anchor is connected to the main beam end or the cable tower end; A vibration damper is disposed at the first end of the cable guide tube, and the vibration damper is connected to the stay cable body.
3. The stay cable according to claim 2, characterized in that: The cable force monitoring component comprises: A pressure detection element is disposed between the anchor plate and the anchor, and is used to detect the pressure between the anchor plate and the anchor; A magnetic flux detection element is arranged at the second end of the anchor, and is used to detect the change of magnetic flux rate between the anchor and the inclined cable body.
4. The stay cable according to claim 1, characterized in that: The main body of the cable is made of a galvanized steel wire rope body, and the tensile strength of the galvanized steel wire rope body is greater than or equal to 1770 MPa.
5. The stay cable according to claim 2, characterized in that: The protection component comprises: A waterproof cover is sleeved on the main beam end of the inclined cable body, a first end of the waterproof cover is covered on the first end of the cable guide tube, and a second end of the waterproof cover is sealed and connected to the inclined cable body.
6. The stay cable according to claim 5, characterized in that: A sealing ring is provided at the second end of the waterproof cover, the outer ring of the sealing ring abuts against the inner wall surface of the waterproof cover, and the inner ring of the sealing ring abuts against the outer wall surface of the inclined cable body; Sealant is applied between the outer ring of the sealing ring and the inner wall surface of the waterproof cover, and between the inner ring of the sealing ring and the outer wall surface of the inclined cable body.
7. The stay cable according to claim 5, characterized in that: The protection component also includes: A protection tube is sleeved on the stay cable body and connected to the waterproof cover.
8. The stay cable according to claim 2, characterized in that: A protective cover is provided on the side of the anchor plate facing away from the inclined cable body. The protective cover is sealed and connected to the anchor plate, and the protective cover is provided on the anchor.
9. The stay cable according to any one of claims 1 to 8, characterized in that: The surface of the stay cable body is provided with a PVF wrapping tape.
10. The stay cable according to any one of claims 1 to 8, characterized in that: An anti-vibration helical wire is wound on the surface of the inclined cable body, and the anti-vibration helical wire is used to change the surface aerodynamic shape of the inclined cable body.