A catwalk structure with a double-layer load-bearing cable and its construction method

Abstract

The present application relates to a catwalk structure with a double-layer load-bearing cable and a construction method thereof, which includes: a top load-bearing layer, which includes multiple top load-bearing cables; a bottom load-bearing layer, which is spaced below the top load-bearing layer and includes multiple bottom load-bearing cables; a top suspension layer, which is supported on the top load-bearing layer; a bottom paving layer, which is supported on the bottom load-bearing layer and fixedly connected to the bottom load-bearing layer; a connecting component, which is arranged between the top load-bearing layer and the bottom load-bearing layer, and its two ends are respectively fixedly connected to the bottom paving layer and the top suspension layer, and form a tensile force on the top load-bearing layer and the bottom load-bearing layer, so that the top load-bearing layer and the bottom load-bearing layer jointly bear the load. The top load-bearing layer and the bottom load-bearing layer jointly bear the load of the formed target catwalk and subsequent structures involved on the target catwalk. At this time, the number of load-bearing cables in the bottom load-bearing layer can be liberated, and finally, during the construction of the catwalk in special scenarios and with a small width, the load-bearing cables to be constructed can be smoothly made to meet the spacing requirements.

Description

Technical Field

[0001] The present application relates to the field of catwalk construction, and in particular to a catwalk structure with double-layer load-bearing cables and a construction method thereof. Background Art

[0002] The catwalk system is a temporary construction access road erected under and parallel to the main cables during the construction of a suspension bridge. It serves as an aerial scaffolding for construction workers to carry out construction work and a construction platform for the main cable system.

[0003] A catwalk system generally consists of catwalk load-bearing cables, gantry support cables, gantry, surface layer, railings and handrails, transverse bridges, and wind-resistant systems. The catwalk load-bearing cables are the primary load-bearing components of the system and are typically positioned approximately 1.5 meters below the centerline of the main cable after the catwalk is formed.

[0004] In current catwalk system designs, all catwalk load-bearing cables are arranged on the lower crossbeam of the portal frame, bearing all dead and live loads of the catwalk system except for the portal support cables. The portal structure, as the catwalk's conformal structure, primarily bears its own weight. However, for some special suspension bridges, such as those with a small rise-span ratio, the small rise-span ratio will result in large load-bearing cable forces, necessitating the installation of a larger number of load-bearing cables to meet the load requirements. This, coupled with the limited space available for lower crossbeam placement, makes it difficult to arrange a large number of catwalk load-bearing cables. For another example, for suspension bridges with a small main cable clearance, the main cable clearance will limit the catwalk width. This small catwalk width will also result in less space on the lower crossbeam for arranging the catwalk load-bearing cables, making it difficult to arrange a corresponding number of load-bearing cables. Summary of the Invention

[0005] The embodiments of the present application provide a catwalk structure with double-layer load-bearing cables and a construction method thereof, so as to solve the problem in related technologies that the catwalk load-bearing cables are difficult to be centrally arranged at the bottom of the catwalk when facing special bridge bodies or scenes.

[0006] In the first aspect, a catwalk structure with double-layer load-bearing cables is provided, which adopts the following technical solutions:

[0007] A catwalk structure with double-layer load-bearing cables, comprising:

[0008] a top load-bearing layer comprising a plurality of top load-bearing cables;

[0009] a bottom load-bearing layer, which is spaced below the top load-bearing layer and includes a plurality of bottom load-bearing cables;

[0010] A top hanging layer, which is supported on the top load-bearing layer;

[0011] A bottom layer, which is supported on the bottom load-bearing layer and fixedly connected to the bottom load-bearing layer;

[0012] A connecting component is provided between the top bearing layer and the bottom bearing layer. Both ends of the connecting component are fixedly connected to the bottom paving layer and the top hanging layer respectively, and form a tensile force on the top bearing layer and the bottom bearing layer, so that the top bearing layer and the bottom bearing layer jointly bear the load.

[0013] In some embodiments, the combined load-bearing capacity of the top bearing layer and the bottom bearing layer at least meets the total load-bearing requirements for main cable construction on the target catwalk, and the spacing between the top bearing cables and between the bottom bearing cables respectively meets the corresponding construction spacing requirements.

[0014] In some embodiments, the number of the bottom bearing cables at least meets the load-bearing requirements for building the target catwalk and the construction spacing requirements under the width conditions of the target catwalk.

[0015] In some embodiments, the connecting component includes:

[0016] A plurality of connecting rods, one end of each connecting rod is fixedly connected to the top hanging layer;

[0017] A connecting seat is fixedly installed on the bottom paving layer and is used for fixedly connecting with the other end of the connecting rod.

[0018] In some embodiments, the connecting seat and the connecting rod are fixedly connected by pin joints, and the pin shaft direction is perpendicular to the connecting rod.

[0019] In some embodiments, the top hanging layer includes a plurality of top cross beams spanning the top bearing layer, and the plurality of top cross beams are arranged at intervals along the extending direction of the top bearing cable structure;

[0020] The bottom paving layer includes a plurality of bottom cross beams spanning the bottom bearing layer. The plurality of bottom cross beams are all fixedly connected to the bottom bearing layer and correspond to the top cross beams one by one.

[0021] In some embodiments, the top bearing cable and the bottom bearing cable are the same or different load-bearing cables.

[0022] In a second aspect, a construction method for a catwalk structure with double-layer load-bearing cables is provided, and the following technical solutions are adopted:

[0023] A construction method for a catwalk structure with double-layer load-bearing cables includes:

[0024] According to the total load-bearing requirements for main cable construction on the target catwalk, calculate the structural parameters of the top and bottom bearing layers in the top bearing layer;

[0025] According to the structural parameters of the top and bottom bearing layers in the top bearing layer, build the bottom bearing layer and the top bearing layer;

[0026] Construct a top hanging layer and a bottom laying layer on the top bearing layer and the bottom bearing layer respectively;

[0027] A connecting component is arranged between the top hanging layer and the bottom laying layer, and a tensile force is applied to the top hanging layer and the bottom laying layer, so that the top bearing layer and the bottom bearing layer jointly bear the load.

[0028] In some embodiments, according to the load-bearing requirements during the main cable construction on the target catwalk, calculate the structural parameters of the top and bottom bearing layers in the top bearing layer, including the following steps:

[0029] Obtain the structural parameters of the bottom bearing cable according to the load-bearing requirements during the construction of the target catwalk;

[0030] Obtain the structural parameters of the top bearing layer according to the total load-bearing requirements during the main cable construction on the target catwalk and the structural parameters of the bottom bearing layer.

[0031] In some embodiments, in the step of constructing a top hanging layer and a bottom laying layer on the top bearing layer and the bottom bearing layer respectively,

[0032] After the bottom laying layer is constructed, construct the top hanging layer on the bottom laying layer.

[0033] The beneficial effects brought by the technical solution provided by this application include:

[0034] The embodiment of this application provides a catwalk structure with double-layer bearing cables and a construction method. Since the top hanging layer and the bottom laying layer are respectively supported by the top bearing layer and the bottom bearing layer, and at the same time, the two are connected by a connecting component to achieve a tensile connection, and a tensile force is applied to the top bearing layer and the bottom bearing layer, the top bearing layer and the bottom bearing layer jointly bear the load of the formed target catwalk and the structures involved in the subsequent target catwalk. That is, when the target catwalk is in use, the load is no longer concentrated on the bottom bearing layer. At this time, the number of bearing cables in the bottom bearing layer can be liberated and transferred to the top bearing layer for setting. Finally, during the construction of the catwalk in special scenarios and with a smaller width, the bearing cables to be constructed can meet the spacing requirements smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0036] Figure 1 It is a schematic diagram of the overall structure of an embodiment provided by the embodiment of this application;

[0037] Figure 2 Schematic diagram of a partial structure of an embodiment provided by an embodiment of the present application.

[0038] In the figure:

[0039] 1. Top bearing layer; 10. Top bearing cable;

[0040] 2. Bottom bearing layer; 20. Bottom bearing cable;

[0041] 3. Top hanging layer; 30. Top cross beam; 31. Strand traction system;

[0042] 4. Bottom paving layer; 40. Bottom cross beam;

[0043] 5. Connection component; 50. Connecting rod; 51. Jack; 52. Connection seat;

[0044] 6. Catwalk surface layer; 60. Strand bracket;

[0045] 7. Rail handrail;

[0046] 8. Main cable. Detailed implementation manners

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0048] The embodiments of the present application provide a catwalk structure with double-layer bearing cables and its construction method, which can solve the problem that in the related art, it is difficult to centrally arrange the catwalk bearing cables at the bottom of the catwalk when facing special bridge bodies or scenarios.

[0049] Refer to Figure 1 , a catwalk structure with double-layer bearing cables, which includes:

[0050] A top bearing layer 1, which includes multiple top bearing cables 10;

[0051] A bottom bearing layer 2, which is spaced below the top bearing layer 1 and includes multiple bottom bearing cables 20;

[0052] A top hanging layer 3, which is supported on the top bearing layer 1;

[0053] A bottom paving layer 4, which is supported on the bottom bearing layer 2 and fixedly connected to the bottom bearing layer 2;

[0054] A connecting component 5 is provided between the top bearing layer 1 and the bottom bearing layer 2. The two ends of the connecting component 5 are respectively fixedly connected to the bottom laying layer 4 and the top hanging layer 3, and form a tensile force on the top bearing layer 1 and the bottom bearing layer 2, so that the top bearing layer 1 and the bottom bearing layer 2 jointly bear the load.

[0055] Among them, the top bearing layer 1 includes multiple top bearing cables 10 that are parallel, coplanar, and spaced apart. The bottom bearing layer 2 includes multiple bottom bearing cables 20 that are parallel, coplanar, and spaced apart. Both the top bearing cables 10 and the bottom bearing cables 20 are fixedly connected to the anchor body through a bearing cable anchoring system. The main cable 8 to be installed later is located between the top bearing layer 1 and the bottom bearing layer 2. At the same time, in this embodiment, the bottom laying layer 4 and the bottom bearing layer 2 are fixedly connected, and the top hanging layer 3 and the top bearing layer 1 are fixedly connected.

[0056] Since the bottom laying layer 4 is supported on the bottom bearing layer 2 and fixedly connected to the bottom bearing layer 2, when the connecting component 5 applies a tensile force to the top bearing layer 1 and the bottom bearing layer 2, the top bearing layer 1 can vertically transfer part of the load it bears to the top hanging layer 3 through the connecting component 5, thereby realizing that the top bearing layer 1 and the bottom bearing layer 2 can jointly bear the load.

[0057] With this setting, the top bearing layer 1 and the bottom bearing layer 2 jointly bear the load for the formed target catwalk and the structures involved in the subsequent target catwalk. That is, when the target catwalk is in use, the load is no longer concentrated on the bottom bearing layer 2. At this time, the number of bearing cables in the bottom bearing layer 2 can be liberated and transferred to the top bearing layer 1 for setting. Finally, during the construction of the catwalk with a special scenario and a small width, the bearing cables to be constructed can meet the spacing requirements smoothly.

[0058] Optionally, the joint bearing capacity of the top bearing layer 1 and the bottom bearing layer 2 at least meets the total bearing requirement for the construction of the main cable 8 on the target catwalk, and the spacing between the top bearing cables 10 and the spacing between the bottom bearing cables 20 respectively meet the corresponding construction spacing requirements.

[0059] Among them, the types or specifications of the top bearing cables 10 and the bottom bearing cables 20 can be the same or different in different embodiments. After determining the types and specifications of the top bearing cables 10 and the bottom bearing cables 20, the magnitude of the cable force that both can provide can be known. Therefore, it can be understood that the specific number of the top bearing cables 10 and the bottom bearing cables 20 in the top bearing layer 1 and the bottom bearing layer 2 will be obtained according to the bearing requirement during the construction of the main cable 8 on the subsequent target catwalk to ensure the smooth progress of the subsequent construction of the main cable 8. At the same time, the top bearing cables 10 and the bottom bearing cables 20 also need to meet the basic construction spacing requirements.

[0060] It should be noted that in different embodiments, depending on the different construction methods of the target catwalk, the requirements for the number of internal bearing cables for the two are different. For example, for the construction plan of first building the bottom bearing layer 2 and the top bearing layer 1 and connecting them through the connecting component 5, and then setting other structures of the target catwalk on the bottom bearing layer 2 or the top bearing layer 1, since the bearing structure is built at one time, the requirements for the number of bearing cables for each of the two are relatively small, and the construction of the remaining structures of the target catwalk can be guaranteed subsequently; but for the construction plan of first building the bottom bearing layer 2 and then immediately building the target catwalk, since the top bearing layer 1 is not built at this time, the bottom bearing layer 2 will independently bear the bearing requirements during the construction of the target catwalk.

[0061] For the above construction method, in this embodiment, further, the number of the bottom bearing cables 20 at least meets the bearing requirements during the construction of the target catwalk and the construction spacing requirements under the width conditions of the target catwalk. The number of the bottom bearing cables 20 will be correspondingly set to meet the bearing requirements during the construction of the target catwalk.

[0062] It should be noted that since there is no bearing of the to-be-constructed main cable 8 before the top bearing layer 1 is built and connected to the bottom bearing layer 2, that is, before the target catwalk is completed, the bearing requirements of the bottom bearing cables 20 during the construction stage of the target catwalk will not consider the weight of the to-be-constructed main cable 8. And because the weight of the main cable 8 accounts for a relatively large proportion, the number of the bottom bearing cables 20 used when not considering the weight of the main cable 8 is less than that in the prior art where the catwalk and the main cable 8 are entirely borne by the bottom bearing cables 20. Thus, it effectively improves the problem that it is difficult to construct and arrange due to too many bottom bearing cables 20, and at the same time enables the overall construction process to proceed smoothly.

[0063] Specifically, the loads that the bottom bearing layer 2 needs to consider include the catwalk surface layer 6 set on the bottom paving layer 4, the railing handrails 7 set on the catwalk surface layer 6 and other structures that constitute the target catwalk, the top hanging layer 3, the connecting component 5, and the main cable 8 construction equipment that needs to be installed in advance on the catwalk surface layer 6 and the top hanging layer 3, such as the main cable 8 strand bracket 60 set on the catwalk surface layer 6, the main cable 8 strand traction system 31 installed below the top hanging layer 3, etc. These structures will bear the weight on the bottom bearing layer 2 first during the transportation before installation and the installation process until the top bearing layer 1 is finally connected to the bottom bearing layer 2 through the connecting component 5 and they bear the weight together.

[0064] With such a setting, it effectively meets the requirement that when constructing and building the target catwalk based on the bottom bearing layer 2, the bottom bearing layer 2 can still meet the bearing requirements, and at the same time, the number of the bottom bearing cables 20 inside it can still be effectively reduced compared with the prior art.

[0065] Refer toFigure 2 , optionally, the connecting component 5 includes:

[0066] a plurality of connecting rods 50, one end of the connecting rod 50 is fixedly connected to the top suspension layer 3;

[0067] a connecting seat 52, which is fixedly installed on the bottom paving layer 4 and is used for fixedly connecting with the other end of the connecting rod 50.

[0068] Among them, when the connecting seat 52 is closed and connected with the connecting rod 50, in this embodiment, forced closure is specifically carried out through a jack 51. Specifically, by fixedly connecting both ends of the jack 51 with the top and pull seats fixedly arranged on the bottom paving layer 4 and the end of the connecting rod 50, and then shortening the length of the jack, the ends of the connecting seat 52 and the connecting rod 50 are closed to a position where pin connection can be carried out for pin connection and fixation. When the connecting seat 52 and the connecting rod 50 are pin-connected, the pin axis direction is perpendicular to the direction of the connecting rod 50.

[0069] With such a setting, before the top suspension layer 3 and the bottom paving layer 4 are suspended by the connecting component, the connecting rod 50 can be installed on the top suspension layer 3 first, the connecting seat can be arranged on the bottom paving layer 4 first, and pin connection is carried out subsequently. While facilitating the overall construction, the top bearing layer 1 and the bottom bearing layer 2 are enabled to jointly bear the load, and a stable tensile force is ensured to be formed between the two after connection.

[0070] Optionally, the top suspension layer 3 includes a plurality of top cross beams 30 spanning across the top bearing layer 1, and the plurality of top cross beams 30 are arranged at intervals along the extending direction of the top bearing cable 10 structure.

[0071] The bottom paving layer 4 includes a plurality of bottom cross beams 40 spanning across the bottom bearing layer 2, and the plurality of bottom cross beams 40 are all fixedly connected to the bottom bearing layer 2 and correspond to the top cross beams 30 one by one.

[0072] Specifically, the bottom surface of the top cross beam 30 is fixedly connected to each top bearing cable 10 at the same time, its extending direction is perpendicular to the top bearing cable 10, and both ends extend beyond the top bearing layer 1; the bottom surface of the bottom cross beam 40 is fixedly connected to each bottom bearing cable 20 at the same time, its extending direction is perpendicular to the bottom bearing cable 20, and both ends extend beyond the bottom bearing layer 2. Both ends of the top cross beam 30 are respectively connected to two connecting rods 50, and the connecting rods 50 extend vertically above the bottom cross beam 40. The top cross beam 30 and the two connecting rods 50 form a frame structure with an open bottom, enabling them to be moved and installed together. Finally, after connecting the bottom cross beam 40 of the bottom paving layer 4, the bottom cross beam 40, the connecting rod 50, and the top cross beam 30 are combined to form one of the multiple portal frames of the target catwalk, and multiple portal frames are arranged at intervals in sequence in the extending direction of the target catwalk.

[0073] Optionally, the top load-bearing cable 10 and the bottom load-bearing cable 20 are the same or different load-bearing cables.

[0074] In this embodiment, the top load-bearing cable 10 and the bottom load-bearing cable 20 are preferably the same load-bearing cable.

[0075] This setting facilitates the calculation of the load-bearing cable during use and the operation during the installation process, reducing the operation difficulty of the equipment.

[0076] Second, the present application provides a construction method for a catwalk structure with a double-layer load-bearing cable.

[0077] A construction method for a catwalk structure with a double-layer load-bearing cable includes the following steps:

[0078] S100. According to the total load-bearing requirements for the main cable 8 construction on the target catwalk, calculate the structural parameters of the top and bottom load-bearing layers 1 and 2 in the top load-bearing layer 1;

[0079] S200. According to the structural parameters of the top and bottom load-bearing layers 1 and 2 in the top load-bearing layer 1, build the bottom load-bearing layer 2 and the top load-bearing layer 1;

[0080] S300. Build the top hanging layer 3 and the bottom paving layer 4 on the top load-bearing layer 1 and the bottom load-bearing layer 2 respectively;

[0081] S400. Set the connection component 5 between the top hanging layer 3 and the bottom paving layer 4, and apply a tension to the top hanging layer 3 and the bottom paving layer 4 to make the top load-bearing layer 1 and the bottom load-bearing layer 2 jointly bear the load.

[0082] Specifically, in this embodiment, the top hanging layer 3, the connection component 5, and the remaining structures constituting the target catwalk will all be installed and constructed based on the bottom paving layer 4. Therefore, the bottom load-bearing layer 2 needs to meet the corresponding load-bearing requirements. To make the design of the bottom load-bearing layer 2 meet the load-bearing requirements, the following technical solutions are adopted:

[0083] In some embodiments, if the top load-bearing cable 10 used in the top load-bearing layer 1 and the bottom load-bearing cable 20 used in the bottom load-bearing layer 2 are different, in step S100, according to the load-bearing requirements during the main cable 8 construction on the target catwalk, calculating the structural parameters of the top and bottom load-bearing layers 1 and 2 in the top load-bearing layer 1 includes the following steps:

[0084] S110. According to the load-bearing requirements when building the target catwalk, obtain the structural parameters of the bottom load-bearing cable 20;

[0085] S120. According to the total load-bearing requirements for the main cable 8 construction on the target catwalk and the structural parameters of the bottom load-bearing layer 2, obtain the structural parameters of the top load-bearing layer 1.

[0086] Specifically, in step S110, according to the load parameters of the specifications of the underlying load-bearing cables 20 to be used, the gantry, the catwalk surface layer 6, the railing handrails 7, the catwalk construction equipment, the construction personnel, etc. arranged above the underlying load-bearing layer 2, the cable forces of the required underlying load-bearing cables 20 are calculated, and the number of the underlying load-bearing cables 20 is preliminarily selected to meet the load-bearing requirements and the construction spacing requirements at the same time.

[0087] In step S120, in addition to the load parameters used in step S110, the load parameters involved in the construction of the new main cable 8, such as the weight of the main cable 8, the main cable 8 construction equipment, the construction personnel, etc., are combined with the number of the underlying load-bearing cables 20 that have been calculated to obtain the cable forces that the top load-bearing layer 1 needs to provide, and further combined with the top load-bearing cables 10 to be used, the number of the top load-bearing cables 10 is obtained.

[0088] In addition, in some embodiments, if the top load-bearing cables 10 and the underlying load-bearing cables 20 are the same, step S100 includes:

[0089] S110. Obtain the total number of load-bearing cables according to the total load-bearing requirements for the construction of the main cable 8 on the target catwalk;

[0090] S120. Obtain the number of the underlying load-bearing cables 20 according to the load-bearing requirements when building the target catwalk;

[0091] S130. Obtain the structural parameters of the top load-bearing cables 10 according to the total number of load-bearing cables and the number of the underlying load-bearing cables 20.

[0092] Specifically, first, according to the total load-bearing requirements for the construction of the main cable 8 on the target catwalk and the specifications of the load-bearing cables, the total cable force required and the total number of load-bearing cables required are calculated; then, according to the load-bearing requirements when building the target catwalk, the number of load-bearing cables required for the underlying load-bearing layer 2 is calculated, and further, the number of the top load-bearing cables 10 can be directly obtained according to the difference between the total number of load-bearing cables and the number of load-bearing cables required for the underlying load-bearing layer 2.

[0093] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application 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. Therefore, it should not be construed as a limitation of the present application. Unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0094] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0095] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for constructing a catwalk structure with a double-layer load-bearing cable, comprising: A top load-bearing layer (1), comprising a plurality of top load-bearing cables (10); A bottom load-bearing layer (2) is spaced below the top load-bearing layer (1) and includes a plurality of bottom load-bearing cables (20); A top hanging layer (3) supported on the top load-bearing layer (1); A bottom layer (4) is supported on the bottom load-bearing layer (2) and is fixedly connected to the bottom load-bearing layer (2); A connecting assembly (5) is provided between the top load-bearing layer (1) and the bottom load-bearing layer (2), with its two ends respectively fixedly connected to the bottom paving layer (4) and the top hanging layer (3), and forms a tensile force on the top load-bearing layer (1) and the bottom load-bearing layer (2), so that the top load-bearing layer (1) and the bottom load-bearing layer (2) can bear the load in a coordinated manner; It is characterized in that the construction method comprises the following steps: Calculating the structural parameters of the top and bottom load-bearing layers (2) within the top load-bearing layer (1) based on the total load-bearing requirements for the construction of the main cable (8) on the target catwalk; According to the structural parameters of the top and bottom load-bearing layers (2) in the top load-bearing layer (1), the bottom load-bearing layer (2) and the top load-bearing layer (1) are constructed; A top hanging layer (3) and a bottom laying layer (4) are respectively constructed on the top load-bearing layer (1) and the bottom load-bearing layer (2); A connecting assembly (5) is provided between the top hanging layer (3) and the bottom laying layer (4), and a tensile force is formed on the top hanging layer (3) and the bottom laying layer (4), so that the top load-bearing layer (1) and the bottom load-bearing layer (2) can bear the load in coordination.

2. The construction method of the catwalk structure with double-layer load-bearing cables according to claim 1, characterized in that: The coordinated load-bearing capacity of the top load-bearing layer (1) and the bottom load-bearing layer (2) at least meets the total load-bearing requirements for the construction of the main cable (8) on the target catwalk, and the spacing between the top load-bearing cables (10) and the spacing between the bottom load-bearing cables (20) respectively meet the corresponding construction spacing requirements.

3. The construction method of the catwalk structure with double-layer load-bearing cables according to claim 2, characterized in that: The number of the bottom load-bearing cables (20) at least meets the load-bearing requirements when constructing the target catwalk and the construction spacing requirements under the width conditions of the target catwalk.

4. The construction method of the catwalk structure with double-layer load-bearing cables according to claim 1, characterized in that: The connecting component (5) comprises: a plurality of connecting rods (50), one end of each connecting rod (50) being fixedly connected to the top hanging layer (3); A connecting seat (52) is fixedly mounted on the bottom layer (4) and is used for being fixedly connected to the other end of the connecting rod (50).

5. The construction method of the catwalk structure with double-layer load-bearing cables according to claim 4, characterized in that: The connecting seat (52) is fixed to the connecting rod by pin connection, and the direction of the pin axis is perpendicular to the connecting rod (50).

6. The construction method of a catwalk structure with double-layer load-bearing cables according to claim 1, characterized in that: The top hanging layer (3) comprises a plurality of top cross beams (30) spanning the top load-bearing layer (1), and the plurality of top cross beams (30) are arranged at intervals along the structural extension direction of the top load-bearing cable (10); The bottom layer (4) includes a plurality of bottom cross beams (40) spanning the bottom load-bearing layer (2), and the plurality of bottom cross beams (40) are fixedly connected to the bottom load-bearing layer (2) and correspond one-to-one to the top cross beams (30).

7. The construction method of a catwalk structure with double-layer load-bearing cables according to claim 1, characterized in that: The top layer load-bearing cable (10) and the bottom layer load-bearing cable (20) are the same or different load-bearing cables.

8. The construction method of a catwalk structure with double-layer load-bearing cables according to claim 1, characterized in that: If the top load-bearing cable (10) used in the top load-bearing layer (1) and the bottom load-bearing cable (20) used in the bottom load-bearing layer (2) are different, the calculation of the structural parameters of the top and bottom load-bearing layers (2) in the top load-bearing layer (1) according to the load-bearing requirements when constructing the main cable (8) on the target catwalk comprises the following steps: According to the load-bearing requirements when constructing the target catwalk, the number of the bottom load-bearing cables (20) is obtained; The number of top-layer load-bearing cables (10) is obtained based on the total load-bearing requirements for the construction of the main cable (8) on the target catwalk and the number of the bottom-layer load-bearing cables (20).

9. The construction method of a catwalk structure with double-layer load-bearing cables according to claim 1, characterized in that: If the top load-bearing cable (10) used in the top load-bearing layer (1) and the bottom load-bearing cable (20) used in the bottom load-bearing layer (2) are the same, the calculation of the structural parameters of the top and bottom load-bearing layers (2) in the top load-bearing layer (1) according to the load-bearing requirements when constructing the main cable (8) on the target catwalk comprises the following steps: According to the total load-bearing requirements for the construction of the main cable (8) on the target catwalk, the total number of load-bearing cables is obtained; According to the load-bearing requirements when constructing the target catwalk, the number of the bottom load-bearing cables (20) is obtained; According to the total number of load-bearing cables and the number of the bottom load-bearing cables (20), the structural parameters of the top load-bearing cables (10) are obtained.

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