Low-altitude inspection ladder and cable-stayed bridge main tower inspection ladder
By designing low-altitude inspection ladders, including ladder structure, rest platform and top platform, and setting up U-shaped guardrails and staggered rest platform on the ladder standard section, the climbing facilities limitations during inspection of the main tower of the towering cable-stayed bridge are solved and The problem of low safety achieves climbing operations that are safe, efficient and flexible to adapt to the shape of the main tower.
Patent Information
- Application Number
- CN202420990650.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-05-09
AI Technical Summary
In the prior art, during close-range and comprehensive inspection of the main tower of the towering cable-stayed bridge, the climbing facilities are limited, the safety is low, the physical consumption of personnel is large, and the adaptability to the complex tower body structure is insufficient.
A low-altitude inspection ladder is designed, including a ladder structure, a rest platform and a top platform. The ladder standard section is equipped with a U-shaped guard ring on the side facing away from the main tower of the cable-stayed bridge, and the rest platform is set between adjacent ladder standard sections. , and the upper and lower sections of the ladder are arranged in a staggered manner in the horizontal direction.
It effectively solves the problem of excessive physical energy consumption during climbing, significantly enhances the adaptability to the complex surface shape of the main tower of the cable-stayed bridge, improves the safety and efficiency of climbing operations, and ensures the main tower of the cable-stayed bridge. Comprehensive inspection and maintenance.
Smart Images
Figure CN222478615U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge maintenance, in particular to a low-altitude inspection ladder and a cable-stayed bridge main tower inspection ladder. Background Art
[0002] As an important form of long-span bridge, the main tower of the cable-stayed bridge is a key load-bearing structure. It not only bears its own weight, but also transmits and balances the load of the main beam through the cable-stayed cable, which plays a decisive role in the overall stability and durability of the bridge. The height and shape of the main tower directly affect the spanning capacity and aesthetic effect of the bridge, so it is often designed as a towering structure of tens or even hundreds of meters. However, such a high main tower brings significant challenges in daily maintenance and inspection.
[0003] Due to the significant height of the main tower, close-up and all-round inspections require reliable climbing facilities. Although traditional vertical ladders can meet basic climbing needs, the difficulty of climbing increases sharply with the increase in height, which consumes a lot of physical energy, and long-term high-altitude work can easily cause fatigue, leading to more safety hazards. In addition, the main tower of the cable-stayed bridge has a complex structure and may have irregular curves or special shapes on the surface, which puts higher requirements on the adaptability and flexibility of the ladder. Utility Model Content
[0004] The utility model provides a low-altitude inspection ladder and a cable-stayed bridge main tower inspection ladder, which are used to solve the defects of the prior art faced in the close-range and all-round inspection of the towering cable-stayed bridge main tower, such as the limitations of climbing facilities, low safety, great physical exertion of personnel and insufficient adaptability to complex tower structures, so as to realize safe, efficient and flexible climbing operations that adapt to the main tower shape, and ensure comprehensive inspection and maintenance of the cable-stayed bridge main tower.
[0005] The utility model provides a low-altitude inspection ladder, comprising: a ladder structure, arranged on the side of the main tower of a cable-stayed bridge, comprising a plurality of standard ladder sections, wherein the plurality of standard ladder sections are sequentially distributed from low to high; a rest platform, arranged between any two adjacent standard ladder sections, wherein the standard ladder sections of the upper and lower sections of the rest platform are staggered in the horizontal direction; and a top platform, arranged at the top of the ladder structure.
[0006] According to a low-altitude inspection ladder provided by the utility model, a U-shaped guard ring is provided on a side of the standard section of the ladder away from the main tower of the cable-stayed bridge; a plurality of the U-shaped guard rings are evenly spaced and distributed along the length direction of the standard section of the ladder.
[0007] According to a low-altitude inspection ladder provided by the utility model, the U-shaped guard rings are connected to each other through a plurality of supporting vertical rods.
[0008] According to a low-altitude inspection ladder provided by the utility model, an anchoring assembly is arranged between the standard section of the ladder and the main tower of the cable-stayed bridge; the anchoring assembly includes a first fixing part fixed to the standard section of the ladder, and a second fixing part anchored to the main tower of the cable-stayed bridge, and the first fixing part and the second fixing part are mounted and matched by a flange.
[0009] According to a low-altitude inspection ladder provided by the utility model, the rest platform includes a frame and a grid step plate; in the horizontal direction, the frame is divided into a first connection area, a second connection area and a walking area located therebetween, and the grid step plate is laid in the second connection area and the walking area; the standard ladder section located below the rest platform is connected to the first connection area, and the standard ladder section located above the rest platform is connected to the second connection area.
[0010] According to a low-altitude inspection ladder provided by the utility model, the frame includes a fixed part attached to and anchored on the main tower of the cable-stayed bridge, a horizontal supporting part extending horizontally and connected to the fixed part, and a guardrail part arranged on the outer edge of the horizontal supporting part; an oblique support rod inclined relative to the horizontal plane is arranged between the lower side of the horizontal supporting part and the fixed part.
[0011] According to a low-altitude inspection ladder provided by the utility model, the top platform is a C-shaped structure surrounding the main tower of a cable-stayed bridge; the top platform is provided with at least two connecting ports, the top end of the ladder standard section at the uppermost end of the ladder structure is connected to one of the two connecting ports, and the other of the two connecting ports and the rest of the top platform are paved with grating plates.
[0012] The utility model also provides a cable-stayed bridge main tower inspection ladder, comprising a high-altitude inspection ladder and a low-altitude inspection ladder described in any one of the above embodiments; the high-altitude inspection ladder extends from above the top platform of the low-altitude inspection ladder to the top of the cable-stayed bridge main tower.
[0013] According to a cable-stayed bridge main tower inspection ladder provided by the utility model, the high-altitude inspection ladder is arranged in multiple sections, and a stepping platform is arranged between any two adjacent sections of the high-altitude inspection ladder; the stepping platform includes a climbing opening for the high-altitude inspection ladder to pass through, and a stepping part arranged on at least one side of the climbing opening.
[0014] According to a cable-stayed bridge main tower inspection ladder provided by the utility model, cable connection structures are respectively provided on both sides of the cable-stayed bridge main tower; and the high-altitude inspection ladder is respectively arranged at adjacent positions of the cable connection structures on both sides.
[0015] The low-altitude inspection ladder and the cable-stayed bridge main tower inspection ladder provided by the utility model effectively solve the problem of excessive physical exertion of personnel during climbing through the rest platforms between adjacent ladder standard sections and their staggered layout in the horizontal direction, and also significantly enhance the adaptability to the complex surface shape of the cable-stayed bridge main tower. Among them, the rest platform embedded in the ladder structure provides a safe and stable temporary stop for climbers during the climbing process. The adjacent ladder standard sections are staggered in the horizontal direction, so that the entire ladder structure can better conform to the complex surface morphology of the cable-stayed bridge main tower. The low-altitude inspection ladder and the cable-stayed bridge main tower inspection ladder provided by the utility model, by virtue of the rest platform setting and the staggered layout of adjacent ladder standard sections, take into account the physical management of personnel during climbing and the adaptability to the complex structure of the cable-stayed bridge main tower, and provide solid technical support for achieving safe, efficient and flexible climbing operations that adapt to the main tower shape and ensuring comprehensive inspection and maintenance of the cable-stayed bridge main tower. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0017] Figure 1 This is one of the structural schematic diagrams of the cable-stayed bridge main tower inspection ladder provided by the utility model;
[0018] Figure 2 This is the second structural schematic diagram of the cable-stayed bridge main tower inspection ladder provided by the utility model;
[0019] Figure 3 It is a structural schematic diagram of a U-shaped retaining ring of a low-altitude inspection ladder provided by the utility model;
[0020] Figure 4 This is one of the structural schematic diagrams of the anchoring assembly of the low-altitude inspection ladder provided by the utility model;
[0021] Figure 5 This is the second structural schematic diagram of the anchoring assembly of the low-altitude inspection ladder provided by the utility model;
[0022] Figure 6 It is a schematic diagram of the top view structure of the rest platform of the low-altitude inspection ladder provided by the utility model;
[0023] Figure 7 It is a side sectional structural schematic diagram of the rest platform of the low-altitude inspection ladder provided by the utility model;
[0024] Figure 8It is a schematic diagram of the top platform of the low-altitude inspection ladder provided by the utility model;
[0025] Fig. 9 It is a schematic diagram of the installation state of the high-altitude inspection ladder of the main tower inspection ladder of the cable-stayed bridge provided by the utility model;
[0026] Fig.10 It is a schematic diagram of the top view of the structure of the stepping platform of the cable-stayed bridge main tower inspection ladder provided by the utility model;
[0027] Reference numerals:
[0028] 10. Standard section of ladder; 11. U-shaped guard ring; 12. Support vertical rod; 13. First fixed part; 14. Second fixed part; 20. Resting platform; 21. Frame; 22. Step plate; 23. First connection area; 24. Second connection area; 25. Walking area; 26. Fixed part; 27. Horizontal support part; 28. Guardrail part; 29. Diagonal brace rod; 30. Top platform; 31. Connection port; 41. High-altitude inspection ladder; 42. Step platform; 43. Climbing port; 44. Step part; 51. Cable connection structure. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. It should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.
[0031] Combine the following Figure 1-Figure 10 The specific implementation modes of the low-altitude inspection ladder and the cable-stayed bridge main tower inspection ladder of the utility model are described.
[0032] The utility model provides a low-altitude inspection ladder, which is used to solve the problems encountered in the prior art when conducting close-range and all-round inspections on the towering main tower of a cable-stayed bridge, such as limited climbing facilities, poor safety, excessive physical exertion of personnel, and insufficient adaptability to complex tower structures. The low-altitude inspection ladder specifically includes: a ladder structure, which is arranged on the side of the main tower of the cable-stayed bridge, including a plurality of ladder standard sections 10, and the plurality of ladder standard sections 10 are distributed in sequence from low to high; a rest platform 20, which is arranged between any two adjacent ladder standard sections 10, and the ladder standard sections 10 of the upper and lower sections of the rest platform 20 are staggered in the horizontal direction; and a top platform 30, which is arranged at the top of the ladder structure. The inspection ladder is modularly designed, including a ladder structure, a rest platform 20 and a top platform 30, and is intended to achieve safe, efficient and flexible climbing operations on the main tower of a cable-stayed bridge, ensuring that comprehensive inspection and maintenance work can be carried out smoothly.
[0033] Specifically, the ladder structure is installed close to the side of the main tower of the cable-stayed bridge, and is composed of a plurality of standard ladder sections 10, which are arranged in order from bottom to top to form a continuous climbing path. In the meantime, the rest platform 20 arranged between adjacent standard ladder sections 10 provides necessary resting space for climbers, which helps to relieve physical exertion and improve work safety. It is worth noting that the standard ladder sections 10 at the upper and lower ends of the rest platform 20 are arranged in a staggered manner in the horizontal direction, so that they can be adaptively adjusted according to the actual structural characteristics of the main tower of the cable-stayed bridge, and effectively deal with the irregular curved surfaces or special shapes that may exist in the tower body. The top platform 30 is located at the highest point of the ladder structure. As a staged climbing target, it provides a stable standing area for climbers, which is convenient for short rest or close-up inspection of local high points. On this basis, if necessary, other climbing structures can be added above the top platform 30 to meet the needs of in-depth inspection of higher areas or specific parts.
[0034] The low-altitude inspection ladder of the utility model successfully overcomes many difficulties faced in the inspection of the towering main tower of the cable-stayed bridge in the prior art by virtue of its modular structure, humanized layout of the rest platform 20, and design features that flexibly adapt to the tower structure, greatly improving the safety and efficiency of the climbing operation, and providing strong support for ensuring that the main tower of the cable-stayed bridge is comprehensively and effectively inspected and maintained. In terms of production and manufacturing, the modular and standardized ladder standard sections 10 and the rest platform 20 have relatively uniform specifications, which are convenient for factory batch production and processing, reduce manufacturing costs, and improve production efficiency. In the installation link, the modular design enables the ladder structure to be assembled in sections, avoiding the risks and difficulties brought about by hoisting a ladder that is too long at one time. The staff can install and connect the ladder standard section 10 and the rest platform 20 in sections according to the on-site conditions, which not only reduces the workload but also improves the construction safety.
[0035] In addition, the first section of the ladder standard section 10 is preferably 100 cm or more from the ground to ensure that the climber has a more comfortable starting position when starting to climb, and to avoid being too close to the ground to cause inconvenience in movement or interference with ground obstacles. The net spacing between adjacent ladder standard sections 10 in the horizontal direction is preferably greater than or equal to 1 m to ensure that the climber has sufficient space for activities on the rest platform 20. The low-altitude inspection ladder is preferably made of steel structure. In order to further improve the weather resistance and service life of the inspection ladder, the steel structure is preferably treated with hot-dip galvanizing to form a dense zinc layer on the surface of the steel, which effectively isolates air and moisture, prevents the occurrence of rust, and ensures the long-term and stable use of the inspection ladder in outdoor environments.
[0036] According to the low-altitude inspection ladder provided by the utility model, a U-shaped guard ring 11 is provided on the side of the ladder standard section 10 away from the main tower of the cable-stayed bridge; a plurality of U-shaped guard rings 11 are evenly spaced along the length direction of the ladder standard section 10. The U-shaped guard ring 11 provides additional lateral protection for climbers to prevent accidental falls or slipping out of the ladder, significantly improving the safety factor during the climbing process.
[0037] Preferably, within the guardrail range of the rest platform 20, the corresponding part of the ladder standard section 10 may not be provided with a guard ring, which not only saves materials and simplifies the structure, but also prevents the freedom of movement of climbers on the platform from being affected, thereby optimizing the climbing experience.
[0038] Further, according to a low-altitude inspection ladder provided by the utility model, the U-shaped guard rings 11 are connected to each other through a plurality of supporting vertical rods 12. By introducing a plurality of supporting vertical rods 12 between the U-shaped guard rings 11, the stability and coherence of the guard ring structure are enhanced.
[0039] Specifically, each support vertical rod 12 is firmly connected (such as welded) to the U-shaped guard ring 11 on the same ladder standard section 10, ensuring that during the climbing process, even in the face of external impact or the climber accidentally leaning on it, the guard ring system can remain stable without shaking or deformation. The interconnected support structure not only strengthens the local strength of a single U-shaped guard ring 11, but also forms a synergistic protection effect between the guard rings to jointly resist potential threats from different directions, creating a more solid safety space for the climber.
[0040] According to a low-altitude inspection ladder provided by the utility model, an anchoring assembly is provided between the ladder standard section 10 and the main tower of the cable-stayed bridge; the anchoring assembly includes a first fixing portion 13 fixed to the ladder standard section 10, and a second fixing portion 14 anchored to the main tower of the cable-stayed bridge, and the first fixing portion 13 and the second fixing portion 14 are matched by flange installation. By providing an anchoring assembly including the first fixing portion 13, the second fixing portion 14 and the flange installation, a high-strength and high-stability connection between the ladder standard section 10 and the main tower of the cable-stayed bridge is achieved, laying a solid foundation for the safe and efficient operation of the low-altitude inspection ladder. Specifically, the anchoring assembly consists of two parts: one is the first fixing portion 13 fixed to the ladder standard section 10, and the other is the second fixing portion 14 anchored to the main tower of the cable-stayed bridge. The two parts are matched by a precise flange installation method to form a stable connection relationship. At the same time, the flange installation method is also convenient for inspection, adjustment or replacement as needed, which provides convenience for future maintenance work.
[0041] According to a low-altitude inspection ladder provided by the utility model, the rest platform 20 includes a frame 21 and a step plate 22; in the horizontal direction, the frame 21 is divided into a first connection area, a second connection area and a walking area 25 located therebetween, and the step plate 22 is laid in the second connection area and the walking area 25; the ladder standard section 10 located below the rest platform 20 is connected to the first connection area, and the ladder standard section 10 located above the rest platform 20 is connected to the second connection area. The partition design of the rest platform 20 takes into account the connection requirements between the rest platform 20 and the ladder standard section 10 and the spatial layout of personnel walking activities.
[0042] Among them, the grating plate 22 is laid in the second connection area and the walking area 25 to provide a stable and non-slip standing and walking surface for climbers. The grating plate 22 is usually made of high-strength, wear-resistant and non-slip material. Its hollow structure not only reduces the deadweight of the platform, but also facilitates drainage and prevents the safety hazards caused by water and snow accumulation. For example, a press-welded steel grating plate 22 can be used. The standard section 10 of the ladder located below the rest platform 20 is closely connected to the first connection area of the frame 21, and the standard section 10 of the ladder located above the rest platform 20 is firmly docked with the second connection area of the frame 21, so that the entire ladder system transitions smoothly at the rest platform 20. In the low-altitude inspection ladder provided by the utility model, the connection method between the grating plate 22 and the frame 21 has a certain flexibility, and can be welded or bolted to adapt to different engineering requirements and site conditions. Compared with welding, bolt connection has higher reversibility and adjustability, which is convenient for installing, disassembling or replacing the grating plate 22, and is particularly suitable for scenes that require frequent maintenance, adjustment or updating of components. The first connection area and the second connection area may also be determined according to the actual scenario at the construction site, so as to adjust the misalignment relationship between the ladder standard sections 10 .
[0043] According to a low-altitude inspection ladder provided by the utility model, the frame 21 includes a fixing portion 26 attached to and anchored on the main tower of the cable-stayed bridge, a horizontal support portion 27 extending horizontally and connected to the fixing portion 26, and a guardrail portion 28 arranged on the outer edge of the horizontal support portion 27; a diagonal brace rod 29 inclined relative to the horizontal plane is arranged between the lower side of the horizontal support portion 27 and the fixing portion 26. Through the coordinated work of the fixing portion 26, the horizontal support portion 27, the guardrail portion 28 and the diagonal brace rod 29, not only a firm connection with the main tower of the cable-stayed bridge is achieved, but also a safe and stable working platform is provided for the climbing personnel.
[0044] Specifically, the fixing portion 26 is directly attached to and anchored on the main tower of the cable-stayed bridge to form a tight and stable connection. The fixing portion 26 can ensure that the frame 21 and the main tower become a whole through professional anchoring technology (such as chemical anchors, welding, bolt connection, etc.), which can effectively transmit and disperse the load from the ladder and the climbers, prevent the platform from being displaced or loosened during use, and greatly improve the overall stability of the inspection ladder. The structure extending horizontally from the fixing portion 26 is the horizontal support portion 27, which is firmly connected to the fixing portion 26 to provide a large area of plane support for the rest platform 20. The guardrail portion 28 is arranged on the outer edge of the horizontal support portion 27, which can effectively prevent the climbers from accidentally falling. Between the lower side of the horizontal support portion 27 and the fixing portion 26, there are diagonal brace rods 29 inclined relative to the horizontal plane. These rods form a triangular support structure, which plays a supporting and reinforcing role, and enhances the overall rigidity and stability of the frame 21.
[0045] According to a low-altitude inspection ladder provided by the utility model, the top platform 30 is a C-shaped structure surrounding the main tower of the cable-stayed bridge; the top platform 30 is provided with at least two connection ports 31, the top of the ladder standard section 10 at the uppermost end of the ladder structure is connected to one of the two connection ports 31, and the other of the two connection ports 31 and the rest of the top platform 30 are paved with a grating plate 22. The top platform 30 is a C-shaped structure surrounding the main tower of the cable-stayed bridge, so that the platform can fit the shape of the main tower closely, make full use of the space, and provide the largest possible standing and working area for the climbing personnel. The connection port 31 is used to dock with the ladder standard section 10 at the uppermost end of the ladder structure. The top of the ladder standard section 10 at the uppermost end of the ladder structure is connected to one of the two connection ports 31 of the top platform 30, and can be selected on-site from the two connection ports 31 according to the actual use scenario, with high flexibility. The other of the two connection ports 31 and the rest of the top platform 30 are paved with a grating board 22, providing a non-slip and wear-resistant standing surface for climbers.
[0046] The cable-stayed bridge main tower inspection ladder provided by the present invention is described below. The cable-stayed bridge main tower inspection ladder described below and the low-altitude inspection ladder described above can be referred to each other.
[0047] The utility model also provides a cable-stayed bridge main tower inspection ladder, including a high-altitude inspection ladder 41 and a low-altitude inspection ladder of any one of the above embodiments; the high-altitude inspection ladder 41 extends from above the top platform 30 of the low-altitude inspection ladder to the top of the cable-stayed bridge main tower. The cable-stayed bridge main tower inspection ladder integrates the low-altitude inspection ladder and the high-altitude inspection ladder 41, fully covering all inspection requirements of the cable-stayed bridge main tower from low to high, and realizing efficient and safe full-tower inspection operations.
[0048] Among them, the low-altitude inspection ladder adopts any of the above-mentioned embodiments of the low-altitude inspection ladder, and its design features include a modular ladder structure, staggered ladder standard sections 10, a rest platform 20 arranged between the ladder standard sections 10, and a C-shaped top platform 30 surrounding the main tower of the cable-stayed bridge, etc., which provide safe and convenient low-altitude working conditions for climbing personnel and meet the inspection needs of the middle and lower parts of the main tower. As a supplementary part, the high-altitude inspection ladder 41 extends from above the top platform 30 of the low-altitude inspection ladder until it reaches the top of the main tower of the cable-stayed bridge, ensuring full coverage of the full height range of the main tower. The high-altitude inspection ladder 41 can adopt a modular design similar to the low-altitude inspection ladder, but does not need to be staggered in stages to adapt to the narrowing of the surface space of the high-altitude part of the tower.
[0049] By organically combining the low-altitude inspection ladder with the high-altitude inspection ladder 41, the cable-stayed bridge main tower inspection ladder provided by the utility model realizes seamless and integrated inspection of the main tower from the bottom to the top. Climbing personnel can perform preliminary inspections and relay rests on the low-altitude inspection ladder, and then transition to the high-altitude inspection ladder 41 through the top platform 30 to continue to complete the inspection task of the top area of the main tower.
[0050] In order to further enhance safety, a bottom steel mesh is preferably installed at the bottom of the inspection ladder away from the line side to effectively catch the falling climbers and prevent them from falling. At the top of the main tower of the cable-stayed bridge, in addition to the necessary high-altitude inspection ladder 41, auxiliary facilities such as lightning rods and railings are preferably configured to protect the main tower and climbers from lightning strikes, prevent climbers from accidentally falling when working on the top of the tower, and enhance the operational safety of the top area.
[0051] According to the cable-stayed bridge main tower inspection ladder provided by the utility model, the high-altitude inspection ladder 41 is arranged in multiple sections, and a stepping platform 42 is arranged between any two adjacent sections of the high-altitude inspection ladder 41; the stepping platform 42 includes a climbing opening 43 for the high-altitude inspection ladder 41 to pass through, and a stepping part 44 arranged on at least one side of the climbing opening 43. A stepping platform 42 is arranged between any two adjacent sections of the high-altitude inspection ladder 41 to provide a place for climbers to temporarily rest and adjust their positions during the climbing process. Compared with the rest platform 20 in the low-altitude inspection ladder, the stepping platform 42 is more compact in design, reduces the demand for horizontal space, and adapts to the characteristics of limited space in the high-altitude tower body.
[0052] Specifically, the stepping platform 42 mainly includes a climbing opening 43 for the high-altitude inspection ladder 41 to pass through, and a stepping portion 44 provided on at least one side of the climbing opening 43. The climbing opening 43 ensures the continuity of the inspection ladder, allowing climbers to smoothly transition from one section of the inspection ladder to the next. The stepping portion 44 provides a stable standing area for climbers to meet their needs for short rests, posture adjustment or simple operations during the climbing process. The cable-stayed bridge main tower inspection ladder provided by the utility model adopts a high-altitude inspection ladder 41 with multiple sections arranged continuously in the high-altitude part, and a compact stepping platform 42 is provided between two adjacent sections, which not only adapts to the narrow space conditions of the high-altitude tower body, but also meets the safety and comfort needs of climbers when working at high altitudes.
[0053] According to a cable-stayed bridge main tower inspection ladder provided by the utility model, cable connection structures 51 are respectively provided on both sides of the cable-stayed bridge main tower; and the high-altitude inspection ladder 41 is respectively arranged at adjacent positions of the cable connection structures 51 on both sides. Specifically, the main tower of the cable-stayed bridge is a key structure connecting the main beam and the foundation, and cable connection structures 51 are usually provided on both sides. These connection structures are the parts where the cables of the cable-stayed bridge are anchored to the main tower, and they bear the huge tension transmitted to the main tower by the cables, and are an important part of the main tower structure. The high-altitude inspection ladder 41 should be respectively arranged at adjacent positions of the cable connection structures 51 on both sides, which is not only conducive to targeted inspection and maintenance of key parts, but also ensures the safety of climbing personnel, and also realizes efficient adaptation of the inspection ladder and the main tower structure.
[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.
[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A low altitude inspection ladder, characterized in that: include: A ladder structure is arranged on the side of the main tower of the cable-stayed bridge, comprising a plurality of standard ladder sections (10), wherein the plurality of standard ladder sections (10) are distributed in sequence from low to high; A rest platform (20) is arranged between any two adjacent sections of the ladder standard sections (10), and the ladder standard sections (10) above and below the rest platform (20) are staggered in the horizontal direction; A top platform (30) is arranged at the top of the ladder structure.
2. The low altitude inspection ladder according to claim 1, characterized in that: The ladder standard section (10) is provided with a U-shaped retaining ring (11) on the side thereof facing away from the main tower of the cable-stayed bridge; The plurality of U-shaped retaining rings (11) are evenly spaced and distributed along the length direction of the ladder standard section (10).
3. The low altitude inspection ladder according to claim 2, characterized in that: The U-shaped guard rings (11) are connected to each other via a plurality of supporting vertical rods (12).
4. The low altitude inspection ladder according to claim 1, characterized in that: An anchoring assembly is provided between the ladder standard section (10) and the main tower of the cable-stayed bridge; The anchor assembly comprises a first fixing portion (13) fixed to the ladder standard section (10), and a second fixing portion (14) anchored to the main tower of the cable-stayed bridge, wherein the first fixing portion (13) and the second fixing portion (14) are mounted and matched via a flange.
5. The low altitude inspection ladder according to claim 1, characterized in that: The resting platform (20) comprises a frame (21) and a step plate (22); In the horizontal direction, the frame (21) is divided into a first connection area, a second connection area and a walking area (25) located therebetween, and the grating board (22) is laid in the second connection area and the walking area (25); The standard ladder section (10) located below the rest platform (20) is connected to the first connection area, and the standard ladder section (10) located above the rest platform (20) is connected to the second connection area.
6. The low altitude inspection ladder according to claim 5, characterized in that: The frame (21) comprises a fixing portion (26) attached to and anchored on the main tower of the cable-stayed bridge, a horizontal supporting portion (27) extending horizontally and connected to the fixing portion (26), and a guardrail portion (28) arranged on the outer edge of the horizontal supporting portion (27); An oblique support rod (29) inclined relative to a horizontal plane is provided between the lower side of the horizontal support portion (27) and the fixing portion (26).
7. The low altitude inspection ladder according to claim 1, characterized in that: The top platform (30) is a C-shaped structure surrounding the main tower of the cable-stayed bridge; The top platform (30) is provided with at least two connection ports (31), the top end of the ladder standard section (10) at the uppermost end of the ladder structure is connected to one of the two connection ports (31), and the other of the two connection ports (31) and the rest of the top platform (30) are paved with a grating plate (22).
8. A cable-stayed bridge main tower inspection ladder, characterized in that: It comprises a high altitude inspection ladder (41) and a low altitude inspection ladder as described in any one of claims 1 to 7; The high-altitude inspection ladder (41) extends from above the top platform (30) of the low-altitude inspection ladder to the top of the main tower of the cable-stayed bridge.
9. The cable-stayed bridge main tower inspection ladder according to claim 8, characterized in that: The high-altitude inspection ladder (41) is arranged in multiple sections, and a stepping platform (42) is arranged between any two adjacent sections of the high-altitude inspection ladder (41); The stepping platform (42) comprises a climbing opening (43) for the high-altitude inspection ladder (41) to pass through, and a stepping portion (44) provided on at least one side of the climbing opening (43).
10. The cable-stayed bridge main tower inspection ladder according to claim 8, characterized in that: Cable connection structures (51) are respectively provided on both sides of the main tower of the cable-stayed bridge; The high-altitude inspection ladders (41) are respectively arranged at adjacent positions of the cable connection structures (51) on both sides.