Wind-resistant and anti-collision structure and installation method for high and low four-main cable catwalks

Abstract

The present invention relates to the technical field of catwalk structures for suspension bridge construction, and specifically to a wind-resistant and anti-collision structure and installation method suitable for high and low four-main cable catwalks. It comprises an inner catwalk and an outer catwalk located on the same side of the main beam; the inner catwalk comprises an inner load-bearing cable and a support and inner load-bearing cable, an inner catwalk surface layer and an inner catwalk portal column; the outer catwalk comprises an outer load-bearing cable, an outer catwalk surface layer and an outer catwalk portal column; the inner load-bearing cable is located above the outer load-bearing cable; a gap is left between the inner catwalk and the outer catwalk in the transverse direction of the bridge, and a buffer structure is provided in the gap to avoid rigid collision between the inner catwalk and the outer catwalk; the inner catwalk is connected to the outer catwalk by the buffer structure and can be moved vertically and transversely to the bridge. The anti-collision structure of the present application is simple, and can effectively avoid rigid collision between the inner and outer catwalks on the same side when applied to high and low four-main cable catwalks. It has an excellent buffering and energy absorption effect and has great promotion value.

Description

Technical Field

[0001] The present invention relates to the technical field of catwalk structures for suspension bridge construction, and in particular to a wind-resistant and collision-resistant structure suitable for a high-low four-main-cable catwalk and an installation method thereof. Background Art

[0002] As the spans and loads of suspension bridges continue to increase, especially for 2,000-meter-high, double-deck, multi-lane suspension bridges, the main cable diameter will exceed 1.5 meters. This will require excessively large structures such as saddles, cable clamps, and anchors, necessitating high engineering manufacturing requirements, significant construction difficulty, and low economic returns. In recent years, China has innovatively developed a high-low, four-main-cable suspension bridge structure. This structure replaces a single, oversized main cable with two small-diameter main cables arranged in a high-low configuration. The installation equipment and processes employed are relatively conventional, effectively reducing the difficulty of main cable installation, shortening construction timelines, and reducing costs. Furthermore, the high-low, four-main-cable configuration increases the overall stiffness of the structure, offering significant advantages in resisting wind and vibration in large-span bridges.

[0003] Because of the use of a high-low four-cable system, the superstructure of the suspension bridge also required the layout of four high-low main cable catwalks according to the main cable alignment during construction. Compared to traditional suspension bridges, the single-sided catwalk is replaced by two high-low catwalks: an inner catwalk close to the main girder and an outer catwalk away from the main girder. Traditional double-span catwalk structures utilize transverse channels and wind-resistant cables to enhance wind resistance. The wide spacing between the two catwalks eliminates the risk of collision. For example, the Chinese utility model patent with the patent number "CN215482363U" and the title "A Variable-Lapse Catwalk Suitable for the Construction of a Single-Pillar Spatial Cable Suspension Bridge" introduces a catwalk structure, which is erected on at least two single-pillar towers. The variable-lamp catwalk includes load-bearing cables, a catwalk surface layer, a gantry, and a bracket roller assembly. There are several load-bearing cables, which are erected on all the single-pillar towers at the same time to form a paving plane. The catwalk surface layer is laid on the paving plane on the load-bearing cables. The gantry is erected on the catwalk surface layer transversely along the cross-sectional direction of the catwalk surface layer. Two bracket roller assemblies are arranged on the catwalk surface layer at intervals along the cross-sectional direction of the catwalk surface layer. The bracket roller assembly divides the catwalk surface layer into three areas. The catwalk surface layer in the middle area is a disconnectable detachable connection structure. When the catwalk needs to be converted into a double-width catwalk, it only needs to disconnect the middle area to form a double-width catwalk structure. By adopting a single-span catwalk structure, this structure solves the problem of double-span catwalks colliding and interfering with each other during the installation of the main cable strands of a single-column tower space cable suspension bridge. By converting the single-span catwalk to a double-span catwalk, it better adapts to the changes in the main cable line shape and resolves the contradiction between the catwalk requirements for cable strand installation and space cable conversion in a single-column tower space cable suspension bridge. However, this catwalk structure still has many problems. First, the catwalk structure has requirements for the line shape of the main cable, that is, there can be no height difference between the main cables on the same side, and there can be no height difference between the double-span catwalk structures formed. Second, the disconnectable area in the middle of the catwalk structure is a temporary connection structure, which itself does not have the function of vibration reduction and collision prevention. This temporary connection structure is mostly rigid. When the catwalk shakes, whether in the single-span state or the double-span state, rigid collision will occur, which in serious cases will cause damage to the catwalk structure.

[0004] The catwalk structure described in the aforementioned patent works well for conventional main cables. However, for catwalks with four main cables, the limited space at the top of the tower and the relatively small lateral spacing between the inner and outer catwalks on one side make traditional wind-resistant measures ineffective in high winds. Collisions between the inner and outer catwalks are highly likely to occur, posing a high construction risk. The catwalk is the lifeline of a suspension bridge, operating throughout the entire construction process of its superstructure. To ensure the safety of suspension bridge construction, the catwalk structure must be secure, addressing the wind and collision resistance issues of the four main cables. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology and provide a wind-resistant and collision-resistant structure suitable for high and low four-main cable catwalks.

[0006] The technical solution of the present invention is: a wind-resistant and anti-collision structure suitable for high and low four-main cable catwalks, comprising an inner catwalk and an outer catwalk located on the same side of the main beam;

[0007] The inner catwalk comprises a plurality of inner load-bearing cables spaced apart along the transverse direction of the bridge, an inner catwalk surface layer supported on the inner load-bearing cables, and inner catwalk door frame columns fixed on the inner catwalk surface layer;

[0008] The outer catwalk comprises a plurality of outer load-bearing cables spaced apart along the transverse direction of the bridge, an outer catwalk surface layer supported on the outer load-bearing cables, and outer catwalk door frame columns fixed on the outer catwalk surface layer;

[0009] The inner load-bearing cable is located above the outer load-bearing cable; a gap is left between the inner catwalk and the outer catwalk in the transverse direction of the bridge;

[0010] A buffer structure is provided in the gap to prevent the inner catwalk and the outer catwalk from rigidly colliding with each other; the inner catwalk is connected to the outer catwalk in a vertical and transversely movable manner through the buffer structure.

[0011] According to the present application, a wind-resistant and anti-collision structure applicable to high and low four-main cable catwalks is provided, wherein the buffer structure includes:

[0012] A connector, the connector being a rigid member fixed to a set of inner load-bearing cables near the side of the outer catwalk;

[0013] A limiting rope is a flexible member that is sleeved on the outer catwalk door frame column close to the inner catwalk side and fixedly connected to the connecting piece;

[0014] A first rubber buffer sheath is a tubular structure sleeved on a column of the outer catwalk door frame near the inner catwalk side;

[0015] a second rubber buffer sheath, the second rubber buffer sheath being sleeved on an end of the connecting piece close to the outer catwalk;

[0016] The first rubber buffer sheath and the second rubber buffer sheath contact each other when the gap distance is reduced to a limit distance.

[0017] According to a wind-resistant and anti-collision structure applicable to a high-low four-main cable catwalk provided by the present application, the contact end faces of the first rubber buffer sheath and the second rubber buffer sheath are arc-shaped end faces.

[0018] According to a wind-resistant and anti-collision structure suitable for high and low four-main cable catwalks provided in the present application, the axis of the arc-shaped end surface of the first rubber buffer sheath facing the inner catwalk side extends vertically; the arc-shaped end surface of the second rubber buffer sheath facing the outer catwalk side extends along the bridge direction.

[0019] According to the present application, a wind-resistant and anti-collision structure suitable for high and low four-main cable catwalks is provided, and the connecting part includes an upper splint and a lower splint; the upper splint and the lower splint are respectively placed on the upper and lower sides of the inner load-bearing cables, and the upper splint and the lower splint are connected as a whole by bolts passing through adjacent inner load-bearing cables.

[0020] According to a wind-resistant and anti-collision structure applicable to a high and low four-main cable catwalk provided in the present application, the upper and lower ends of the first rubber buffer sheath are provided with limiting ends that limit the limiting rope from escaping from the first rubber buffer sheath.

[0021] According to the present application, a wind-resistant and anti-collision structure applicable to high and low four-main cable catwalks is provided, wherein the buffer structure includes:

[0022] A connecting frame fixed to a set of inner load-bearing cables near the outer catwalk side;

[0023] A transverse damper is arranged along the transverse direction of the bridge, one end of which is connected to the connecting frame and can be moved up and down, and the other end is fixed on the outer catwalk.

[0024] According to a wind-resistant and anti-collision structure suitable for high and low four-main cable catwalks provided in the present application, a vertically arranged slide rail is provided on the side of the connecting frame close to the outer catwalk; a slider slidably connected to the slide rail is provided on the end of the lateral damper close to the inner catwalk; the slider is fixedly connected to the slide rail except in the vertical direction.

[0025] According to the present application, a wind-resistant and collision-resistant structure suitable for a high-low four-main cable catwalk is provided, which further includes an inner transverse channel and an outer transverse channel arranged along the transverse bridge direction; the two ends of the inner transverse channel are respectively fixedly connected to the two groups of inner catwalks on both sides of the main beam transverse bridge; the two ends of the outer transverse channel are respectively fixedly connected to the two groups of outer catwalks on both sides of the main beam transverse bridge;

[0026] A vibration damping structure for tensioning the catwalk in the event of strong winds is provided between the inner transverse channel and the outer transverse channel.

[0027] According to the present application, a wind-resistant and anti-collision structure applicable to a high and low four-main cable catwalk is provided, wherein the vibration control structure includes:

[0028] Two vibration damping cables, one end of each of which is fixed to the inner transverse channel directly below the inner catwalk on one side, and the other end of each of which extends along the transverse direction of the bridge to the outer transverse channel at the outer catwalk on the other side;

[0029] The two vibration-damping cables are arranged crosswise.

[0030] The present application also provides an installation method for installing the above-mentioned wind-resistant and anti-collision structure applicable to the high and low four-main cable catwalk, and the method is performed according to the following steps:

[0031] S1. Obtain the height difference between the inner catwalk and the outer catwalk on the same side to be installed, and install a suitable buffer structure between the inner catwalk and the outer catwalk on the same side according to the height difference;

[0032] S2. Arrange a vibration damping structure between the inner transverse channel connecting the two groups of inner catwalks and the outer transverse channel connecting the two groups of outer catwalks on both sides.

[0033] According to an installation method provided by the present application, in step S1, the method of installing a suitable buffer structure between the inner catwalk and the outer catwalk on the same side according to the height difference includes: when the height difference between the inner catwalk and the outer catwalk on the same side is less than a first set value, installing a connecting frame on a group of inner load-bearing cables of the inner catwalk close to the outer catwalk, installing a transverse damper arranged along the transverse bridge direction on the side of the outer catwalk close to the inner catwalk, and connecting the slider of the transverse damper close to the end of the inner catwalk to the slide rail on the connecting frame, so that the slider can move vertically on the slide rail.

[0034] According to an installation method provided by the present application, in step S1, the method of installing a suitable buffer structure between the inner catwalk and the outer catwalk on the same side according to the height difference includes: when the height difference between the inner catwalk and the outer catwalk on the same side is greater than or equal to a first set value, installing a connector on a group of inner load-bearing cables of the inner catwalk close to the outer catwalk, installing a first rubber buffer sleeve on the outer catwalk door frame column on the side of the outer catwalk close to the inner catwalk, installing a second rubber buffer sleeve on the end of the connector close to the outer catwalk, so that the first rubber buffer sleeve and the second rubber buffer sleeve are arranged relative to each other in the transverse direction of the bridge, sleeved on the first rubber buffer sleeve, and fixedly connected the limit rope to the connector.

[0035] According to an installation method provided by the present application, in step S2, two vibration damping cables are arranged between a group of inner and outer transverse channels near the tower area, and the inclined upper ends of the vibration damping cables are fixed to the inner transverse channel on one side, and the inclined lower ends of the vibration damping cables are fixedly connected to the outer transverse channel on the other side, so that the two vibration damping cables are arranged crosswise;

[0036] The wind speed conditions at the catwalk site are collected. When the wind speed does not exceed the set wind speed, the vibration control cable is in a relaxed state. When the wind speed exceeds the set wind speed, the vibration control cable is tensioned, and the tensioning force of the vibration control cable is increased to the set tension using the traction structure to lock the buffer structure between the inner catwalk and the outer catwalk on the same side.

[0037] The advantages of the present application are as follows: 1. The present application is used for high and low four-main cable catwalks. By arranging a buffer structure between the inner catwalk and the outer catwalk on the same side, the buffer structure is used to absorb the collision energy generated by the asynchronous movement between the inner catwalk and the outer catwalk, thereby avoiding rigid collision between the inner catwalk and the outer catwalk. The inner catwalk and the outer catwalk can adapt to different weather conditions during use, making the catwalk safer to use, the catwalk structure more stable and reliable, and the service life of the catwalk greatly extended;

[0038] 2. The buffer structure of the present application can absorb collision energy through the combined structure of the first rubber buffer sleeve and the second rubber buffer sleeve. The first rubber buffer sleeve and the second rubber buffer sleeve are simple to install and easy to use, and have an excellent collision dissipation effect. At the same time, the combined structure of the connector and the limiting cable is itself a flexible connection structure, which can stably connect the inner catwalk and the outer catwalk on the same side, and is easy to install.

[0039] 3. The contact surface between the first rubber buffer sleeve and the second rubber buffer sleeve of the present application is an arc-shaped end surface. The arc-shaped end surface can facilitate the sliding of the first rubber buffer sleeve and the second rubber buffer sleeve during the collision process. The collision energy can be dissipated by friction. Compared with direct collision absorption, the sliding absorption method is softer and has a better collision dissipation effect.

[0040] 4. The arcuate end surfaces on the first and second rubber buffer sleeves of the present application are specifically designed according to their respective mounting structures. The first rubber buffer sleeve is a passive structure compared to the second rubber buffer sleeve. The axis of the arcuate end surface of the first rubber buffer sleeve facing the inner catwalk extends vertically, providing the first rubber buffer sleeve with a sufficient contact area. The second rubber buffer sleeve is an active structure compared to the first rubber buffer sleeve. The arcuate end surface of the second rubber buffer sleeve facing the outer catwalk extends along the longitudinal direction of the bridge, enabling sliding friction between the second rubber buffer sleeve and the first rubber buffer sleeve during a collision.

[0041] 5. The connector of the present application has a simple structure and is extremely convenient to install and use. A set of inner load-bearing cables are clamped and fixed by the upper and lower clamping plates, and then the upper and lower clamping plates are tightened and clamped with bolts. The installation method is simple, the connection is firm, and the effect of transmitting the transverse bridge force is good.

[0042] 6. This application provides limit terminals at the upper and lower ends of the first rubber buffer sheath to limit the release of the limit cable, thereby preventing it from being released when the vertical relative displacement between the inner and outer catwalks is too large, thereby improving the stability and safety of the connection.

[0043] 7. The buffer structure of the present application can also adopt another method to buffer and absorb energy through the connection frame and the transverse damper. The vertical limit connection between the transverse damper and the connection frame facilitates the vertical movement between the inner catwalk and the outer catwalk. The transverse damper can effectively absorb the collision energy in the transverse direction of the bridge, and the energy absorption and buffering effect is excellent.

[0044] 8. This application sets a slide rail on the connecting frame, sets a slider on the transverse damper, and the slider is slidably connected to the slide rail. The connection structure is simple and easy to install and use.

[0045] 9. This application sets a vibration damping structure between the inner and outer transverse channels. The vibration damping structure can tension the inner and outer catwalks in windy weather, thereby improving the wind and impact resistance of the high and low four-catwalk structure as a whole.

[0046] 10. The vibration control structure of the present application includes a vibration control cable. Two vibration control cables are cross-tensioned to form a "vibration control cable" consisting of a vibration control cable and a transverse channel between the inner and outer cable catwalks. "Type adaptive tension and compression system improves the overall wind and impact resistance of the four-catwalk structure, with simple installation structure and easy operation;

[0047] 11. The installation method of this application is extremely simple. Targeted buffer structures can be installed according to the height differences of the four-high and low catwalk structures. The buffer structure, combined with the vibration control structure, can effectively improve the wind and impact resistance of the four-high and low catwalk structures. At the same time, the catwalk structure is more stable, and the safety and stability of use are improved, thereby extending the service life.

[0048] 12. This application uses a combined structure of a transverse damper and a connecting frame to buffer and absorb energy when the gap between the inner and outer catwalks on the same side is small. The transverse damper and the connecting frame have a simple structure, are easy to operate, and have excellent transverse energy absorption and collision prevention effects.

[0049] 13. In the case where the gap between the inner catwalk and the outer catwalk on the same side is large, the present invention adopts the structure of the first rubber buffer sheath and the second rubber buffer sheath to buffer and absorb energy, which is easy to install, simple in structure and low in cost.

[0050] 14. The present application sets two vibration control cables between the inner transverse channel and the outer transverse channel, and utilizes two crossed vibration control cables to improve the wind resistance and impact resistance of the high-low four-catwalk structure. The tensioning method is simple and the operation is convenient.

[0051] The anti-collision structure of the present application is simple and can effectively avoid rigid collisions between inner and outer catwalks on the same side when applied to high and low four-main cable catwalks. It has an excellent effect of buffering and absorbing energy and has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 : Schematic diagram of the high and low four main cable catwalk structure of this application (without buffer structure installed);

[0053] Figure 2 : Schematic diagram of the installation of the first buffer structure of this application;

[0054] Figure 3 : Schematic diagram of the installation of the second buffer structure of this application;

[0055] Figure 4 :This application Figure 3 AA view in;

[0056] Figure 5 : Schematic diagram of the vibration control structure arrangement of this application;

[0057] Among them: 1—inner load-bearing cable; 2—inner catwalk surface layer; 3—inner catwalk door frame column; 4—outer load-bearing cable; 5—outer catwalk surface layer; 6—outer catwalk door frame column; 7—connecting piece; 8—limiting cable; 9—first rubber buffer sleeve; 10—second rubber buffer sleeve; 11—limiting end; 12—connecting frame; 13—lateral damper; 14—slider; 15—inner lateral channel; 16—outer lateral channel; 17—vibration control cable. DETAILED DESCRIPTION

[0058] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention.

[0059] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as limiting the present invention.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0061] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0062] This application relates to a wind-resistant and anti-collision structure and installation method for a high and low four-main cable catwalk, mainly used for a four-main cable catwalk structure, such as Figure 1 As shown, the catwalk structure of the four main cables includes four independent catwalks. Each side of the main beam transverse bridge includes one inner catwalk and one outer catwalk. The inner catwalks on the same side are vertically higher than the outer catwalks on the same side, that is, there is a height difference between the catwalk structures on the same side. This application is intended to avoid rigid collisions between the inner and outer catwalks on the same side, avoid damage caused by rigid collisions, and at the same time, to improve the structural stability and safety of the inner and outer catwalks.

[0063] Specifically, such as Figure 1 As shown, the inner catwalk of the present application includes multiple groups of inner load-bearing cables 1 spaced apart along the transverse bridge direction, an inner catwalk surface layer 2 supported on the inner load-bearing cables 1, and inner catwalk gantry columns 3 fixed on the inner catwalk surface layer 2. In fact, the inner catwalk gantry columns 3 on both sides are fixed on the inner catwalk surface layer 2 and form a gantry structure with the inner catwalk crossbeam above. Multiple groups of inner load-bearing cables 1 are arranged below the inner catwalk surface layer 2. Each group of inner load-bearing cables 1 includes multiple inner load-bearing cables 1 spaced apart along the transverse bridge direction. Among them, the gap between adjacent inner load-bearing cables 1 in a group of inner load-bearing cables 1 close to the outer catwalk is smaller than the gap between the inner load-bearing cables 1 in other groups. That is, the inner load-bearing cables 1 in a group close to the outer catwalk are arranged more closely, mainly because this group of inner load-bearing cables 1 is a load-bearing component in the subsequent connection structure.

[0064] The outer catwalk includes multiple groups of outer load-bearing cables 4 spaced apart along the transverse direction of the bridge, an outer catwalk surface layer 5 supported on the outer load-bearing cables 4, and outer catwalk gantry columns 6 fixed on the outer catwalk surface layer 5. In fact, the outer catwalk gantry columns 6 on both sides are fixed on the outer catwalk surface layer 5 and form a gantry structure with the outer catwalk crossbeam above. Multiple groups of outer load-bearing cables 4 are arranged below the outer catwalk surface layer 5. Each group of outer load-bearing cables 4 includes multiple outer load-bearing cables 4 spaced apart along the transverse direction of the bridge. Among them, the gap between adjacent outer load-bearing cables 4 in a group of outer load-bearing cables 4 close to the inner catwalk is smaller than the gap between adjacent outer load-bearing cables 4 in other groups. That is, the group of outer load-bearing cables 4 close to the inner catwalk is arranged more closely, mainly because this group of outer load-bearing cables 4 is a load-bearing component in the subsequent connection structure.

[0065] Since the inner catwalk on the same side is above the outer catwalk on the same side, that is, the inner load-bearing cable 1 is above the outer load-bearing cable 4, a gap is left between the inner catwalk and the outer catwalk in the transverse direction of the bridge. A buffer structure is provided in the gap to avoid rigid collision between the inner catwalk and the outer catwalk. The inner catwalk is connected to the outer catwalk by the buffer structure and can be moved vertically and transversely.

[0066] The buffer structure connects the outer and inner catwalks on the same side. It limits the relative movement between the two catwalks, absorbs the energy generated by relative motion, and prevents rigid collisions between the two catwalks. This arrangement improves the stability and safety of the connecting structure between the outer and inner catwalks on the same side.

[0067] In some embodiments of the present application, the present embodiment optimizes the above-mentioned buffer structure. Specifically, there are two types of buffer structures in the present application, which are applied to two situations respectively. When the transverse distance between the inner catwalk and the outer catwalk on the same side is less than a first set value (the first set value can be set to 2m), the first buffer structure can be adopted.

[0068] like Figure 2 As shown, the first buffer structure includes a connecting frame 12 and a transverse damper 13. The connecting frame 12 is fixed to a set of inner load-bearing cables 1 near the outer catwalk. The connecting frame 12 has a tripod structure, and the upper end of the connecting frame 12 is provided with a clamping structure. The clamping structure includes an upper clamping plate and a lower clamping plate. The upper and lower clamping plates are respectively placed on the upper and lower sides of the inner load-bearing cables 1 and are fixed together by bolts between adjacent inner load-bearing cables 1. The transverse damper 13 is arranged along the transverse direction of the bridge. One end is connected to the connecting frame 12 for vertical movement, and the other end is fixed to the outer catwalk.

[0069] When the inner and outer catwalks on the same side experience vertical relative displacement, the end of transverse damper 13 moves vertically on connecting frame 12. When the inner and outer catwalks on the same side experience transverse relative displacement, transverse damper 13 is stretched or compressed. Transverse damper 13 is flush with the outer catwalk surface 5, bypassing the outer catwalk portal column 6 for force transmission. Therefore, transverse damper 13 effectively acts as a limiter and buffer.

[0070] In order to facilitate the connection between the lateral damper 13 and the connecting frame 12, a vertically arranged slide rail is provided on the side of the connecting frame 12 close to the outer catwalk, and a slider 14 slidably connected to the slide rail is provided on the end of the lateral damper 13 close to the inner catwalk. The slider 14 is fixedly connected to the slide rail except in the vertical direction.

[0071] In some other embodiments of the present application, this embodiment optimizes the second buffer structure mentioned above. When the distance between the inner catwalk and the outer catwalk on the same side in the transverse direction is greater than or equal to the first set value (the first set value can be set to 2m), and generally needs to be less than the second set value (the second set value can be set to 7m), the second buffer structure can be used. Figures 3-4As shown, the second buffer structure includes a connector 7, a limiting cable 8, a first rubber buffer sleeve 9 and a second rubber buffer sleeve 10. The connector 7 is a rigid component fixed on a group of inner load-bearing cables 1 near the outer catwalk side; the limiting cable 8 is a flexible component sleeved on the outer catwalk door frame column 6 near the inner catwalk side and fixedly connected to the connector 7; the first rubber buffer sleeve 9 is a tubular structure sleeved on the outer catwalk door frame column 6 near the inner catwalk side; the second rubber buffer sleeve 10 is sleeved on one end of the connector 7 near the outer catwalk; the first rubber buffer sleeve 9 and the second rubber buffer sleeve 10 contact each other when the gap distance is reduced to the limit distance.

[0072] The connector 7 includes an upper plate and a lower plate, which are positioned above and below the inner load-bearing cable 1 and are connected together by bolts passing between adjacent inner load-bearing cables 1. A through hole is defined at one end of the connector 7, which is adjacent to the outer catwalk, through which the limit cable 8 passes.

[0073] The limiting cable 8 is a looped, flexible rope structure. It passes through a through hole in the connector 7 and is fixedly connected to the connector 7. The limiting cable 8 is sleeved onto the first rubber cushioning sheath 9. By tightening the limiting cable 8, the relative transverse movement distance between the inner and outer catwalks on the same side can be limited. Limiting ends 11 are provided at the upper and lower ends of the first rubber cushioning sheath 9 to prevent the limiting cable 8 from dislodging from the first rubber cushioning sheath 9, thereby preventing the inner and outer catwalks from dislodging if their vertical relative displacement is excessive.

[0074] In order to further improve the energy absorption and buffering effect of the first rubber buffer sheath 9 and the second rubber buffer sheath 10, in this embodiment, the contact end faces of the first rubber buffer sheath 9 and the second rubber buffer sheath 10 are designed to be arc-shaped end faces. During the collision contact process, the arc-shaped end faces can produce relative friction and slippage, and the collision energy can be dissipated through friction. Compared with the direct collision energy absorption method, the friction energy absorption effect is good, the energy dissipation is rapid, and the buffering is more flexible.

[0075] like Figure 4 As shown, the axis of the arcuate end surface of the first rubber cushioning sleeve 9 facing the inner catwalk extends vertically, while the arcuate end surface of the second rubber cushioning sleeve 10 facing the outer catwalk extends along the longitudinal direction. This arrangement ensures that the axis of the arcuate end surface of the first rubber cushioning sleeve facing the inner catwalk extends vertically, providing sufficient contact area for the first rubber cushioning sleeve 9. The arcuate end surface of the second rubber cushioning sleeve 10 facing the outer catwalk extends along the longitudinal direction, allowing sliding friction between the second rubber cushioning sleeve 10 and the first rubber cushioning sleeve 9 during a collision.

[0076] In a further embodiment of the present application, not only is a buffer structure provided between the inner catwalk and the outer catwalk on the same side, but a vibration damping structure is also provided between the catwalks on both sides of the transverse bridge. Figure 5 As shown, the structure also includes an inner transverse channel 15 and an outer transverse channel 16 arranged along the transverse bridge. The two ends of the inner transverse channel 15 are fixedly connected to the two sets of inner catwalks on both sides of the main beam transverse bridge, and the two ends of the outer transverse channel 16 are fixedly connected to the two sets of outer catwalks on both sides of the main beam transverse bridge. The inner transverse channel 15 and the outer transverse channel 16 are rigid components that connect the inner catwalks on both sides and the outer catwalks on both sides. A vibration damping structure is installed between the inner transverse channel 15 and the outer transverse channel 16 to tension the catwalks in high winds. Generally, the vibration damping structure is installed between a group of inner transverse channels 15 and an outer transverse channel 16 near the tower area.

[0077] Specifically, the vibration control structure includes two vibration control cables 17. One end of the vibration control cable 17 is fixed to the inner transverse channel 15 directly below the inner catwalk on one side, and the other end extends along the transverse bridge direction to the outer transverse channel 16 at the outer catwalk on the other side. The two vibration control cables 17 are arranged crosswise. The two vibration control cables 17 form a "cross bridge" composed of vibration control cables and transverse channels between the inner and outer cable catwalks. "Type adaptive tension and compression system improves the overall wind and impact resistance of the four-catwalk structure.

[0078] The specific method of using the vibration control structure is: collect the wind speed conditions on the catwalk. When the wind speed does not exceed the set wind speed (level 6 wind speed), the vibration control rope 17 is in a relaxed state. When the wind speed exceeds the set wind speed, the vibration control rope 17 is tensioned, and the construction work on the catwalk is stopped. The traction structure is used to increase the tensioning force of the vibration control rope 17 to the set tension (10 tons), and the buffer structure between the inner catwalk and the outer catwalk on the same side is locked.

[0079] The transverse direction of the bridge in this application refers to the transverse direction of the bridge, such as Figure 1 In the left and right directions shown in , the along-bridge direction refers to the along-bridge direction of the bridge, such as Figure 1 The direction perpendicular to the paper.

[0080] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A wind-resistant and collision-resistant structure suitable for high and low four-main cable catwalks, comprising an inner catwalk and an outer catwalk located on the same side of the main beam; The inner catwalk comprises a plurality of inner load-bearing cables (1) spaced apart along the transverse direction of the bridge, an inner catwalk surface layer (2) supported on the inner load-bearing cables (1), and an inner catwalk door frame column (3) fixed on the inner catwalk surface layer (2); The outer catwalk comprises a plurality of outer load-bearing cables (4) spaced apart along the transverse direction of the bridge, an outer catwalk surface layer (5) supported on the outer load-bearing cables (4), and an outer catwalk door frame column (6) fixed on the outer catwalk surface layer (5); The inner load-bearing cable (1) is located above the outer load-bearing cable (4); a gap is left between the inner catwalk and the outer catwalk in the transverse direction of the bridge. Its characteristics are: A buffer structure is provided in the gap to prevent the inner catwalk and the outer catwalk from rigidly colliding with each other; the inner catwalk is connected to the outer catwalk in a vertical and transversely movable manner through the buffer structure.

2. A wind-resistant and anti-collision structure suitable for a high-low four-main cable catwalk according to claim 1, characterized in that: The buffer structure includes: A connecting member (7), the connecting member (7) being a rigid member fixed to a set of inner load-bearing cables (1) on one side close to the outer catwalk; A limiting rope (8), wherein the limiting rope (8) is a flexible member sleeved on the outer catwalk door frame column (6) close to the inner catwalk side and fixedly connected to the connecting member (7); A first rubber buffer sheath (9), the first rubber buffer sheath (9) being a tubular structure sleeved on an outer catwalk door frame column (6) close to the inner catwalk side; a second rubber buffer sheath (10), the second rubber buffer sheath (10) being sleeved on one end of the connecting piece (7) close to the outer catwalk; The first rubber buffer sheath (9) and the second rubber buffer sheath (10) contact each other when the gap distance is reduced to a limit distance.

3. A wind-resistant and anti-collision structure suitable for a high-low four-main cable catwalk according to claim 2, characterized in that: The contact end surfaces of the first rubber buffer sheath (9) and the second rubber buffer sheath (10) are arc-shaped end surfaces.

4. A wind-resistant and anti-collision structure suitable for high and low four-main cable catwalks according to claim 3, characterized in that: The axis of the arc-shaped end surface of the first rubber buffer sleeve (9) facing the inner catwalk extends vertically; the axis of the arc-shaped end surface of the second rubber buffer sleeve (10) facing the outer catwalk extends along the bridge direction.

5. The wind-resistant and anti-collision structure for a high-low four-main cable catwalk according to claim 1, characterized in that: The buffer structure includes: A connecting frame (12), wherein the connecting frame (12) is fixed to a group of inner load-bearing cables (1) near one side of the outer catwalk; A transverse damper (13) is arranged along the transverse bridge direction, one end of which is connected to the connecting frame (12) in a manner movable up and down, and the other end is fixed on the outer catwalk.

6. The wind-resistant and collision-resistant structure for a high-low four-main cable catwalk according to claim 1, characterized in that: The invention also includes an inner transverse channel (15) and an outer transverse channel (16) arranged along the transverse bridge direction; two ends of the inner transverse channel (15) are respectively fixedly connected to two groups of inner catwalks on both sides of the main beam transverse bridge; two ends of the outer transverse channel (16) are respectively fixedly connected to two groups of outer catwalks on both sides of the main beam transverse bridge; a vibration damping structure for tensioning the catwalk in the event of strong winds is provided between the inner transverse channel (15) and the outer transverse channel (16); The vibration control structure includes: Two vibration control cables (17), one end of each of the vibration control cables (17) is fixed to an inner transverse channel (15) directly below an inner catwalk on one side, and the other end of each of the vibration control cables (17) extends in a transverse direction to an outer transverse channel (16) at an outer catwalk on the other side; Two vibration-control cables (17) are arranged crosswise.

7. An installation method, characterized in that: The installation method is used to install a wind-resistant and anti-collision structure suitable for a high-low four-main cable catwalk according to any one of claims 1 to 6, and is carried out according to the following steps: S1. Obtain the height difference between the inner catwalk and the outer catwalk on the same side to be installed, and install a suitable buffer structure between the inner catwalk and the outer catwalk on the same side according to the height difference; S2. Arrange a vibration damping structure between the inner transverse channel (15) connecting the two groups of inner catwalks and the outer transverse channel (16) connecting the two groups of outer catwalks on both sides.

8. An installation method according to claim 7, characterized in that: In the step S1, the method for installing a suitable buffer structure between the inner catwalk and the outer catwalk on the same side according to the height difference comprises: when the height difference between the inner catwalk and the outer catwalk on the same side is less than a first set value, installing a connecting frame (12) on a group of inner load-bearing cables (1) of the inner catwalk close to the outer catwalk, installing a transverse damper (13) arranged along the transverse bridge direction on the side of the outer catwalk close to the inner catwalk, connecting a slider (14) at one end of the transverse damper (13) close to the inner catwalk to a slide rail on the connecting frame (12), so that the slider (14) can move vertically on the slide rail.

9. The installation method according to claim 7, wherein: In the step S1, the method for installing a suitable buffer structure between the inner catwalk and the outer catwalk on the same side according to the height difference comprises: when the height difference between the inner catwalk and the outer catwalk on the same side is greater than or equal to a first set value, installing a connector (7) on a group of inner load-bearing cables (1) of the inner catwalk close to the outer catwalk, installing a first rubber buffer sleeve (9) on the outer catwalk door frame column (6) on the side of the outer catwalk close to the inner catwalk, installing a second rubber buffer sleeve (10) on the end of the connector (7) close to the outer catwalk, so that the first rubber buffer sleeve (9) and the second rubber buffer sleeve (10) are arranged relative to each other in the transverse bridge direction, sleeved with a limit rope (8) on the first rubber buffer sleeve (9), and fixedly connecting the limit rope (8) to the connector (7).

10. The installation method according to claim 7, wherein: In the step S2, two vibration control cables (17) are arranged between a group of inner transverse channels (15) and outer transverse channels (16) near the tower area, the inclined upper ends of the vibration control cables (17) are fixed to the inner transverse channel (15) on one side, and the inclined lower ends of the vibration control cables (17) are fixedly connected to the outer transverse channel (16) on the other side, so that the two vibration control cables (17) are arranged crosswise; The on-site wind speed of the catwalk is collected. When the wind speed does not exceed the set wind speed, the vibration control cable (17) is in a relaxed state. When the wind speed exceeds the set wind speed, the vibration control cable (17) is tensioned, and the tensioning force of the vibration control cable (17) is increased to the set tension by using the traction structure, thereby locking the buffer structure between the inner catwalk and the outer catwalk on the same side.

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