Main girder wind-resistant device for cable-stayed-suspension cable cooperative system bridge in construction period and construction method

Abstract

The invention relates to the technical field of bridge engineering, in particular to a main beam wind-resistant device for a cable-stayed-suspension cable cooperative system bridge in the construction period and a construction method. Comprising first connecting parts, second connecting parts, cross beams and anchor cables, the first connecting parts are fixedly connected to a suspension area main beam, the two ends of the suspension area main beam are at least connected with two sets of first connecting parts respectively, and the first connecting parts are distributed on the two sides of the suspension area main beam; the second connecting parts are fixedly connected to the cable-stayed area main beam, the end, close to the suspension area main beam, of the cable-stayed area main beam is at least connected with two sets of the second connecting parts, and the second connecting parts are distributed on the two sides of the cable-stayed area main beam; the cross beam is connected to the two main cables in the overlapping area; one end of the anchor cable is connected with the first connecting part, the middle of the anchor cable penetrates through the cross beam, and the other end of the anchor cable is connected with the second connecting part. The wind resistance of the main beam in the suspension area can be improved, pertinence is high, the wind resistance control effect is good, and installation and application are convenient.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, and in particular to a wind-resistant device for a main beam of a cable-stayed-suspension cooperative system bridge during the construction period and a construction method thereof. Background Art

[0002] As a new type of bridge system, the cable-stayed-suspension cooperative system bridge is a large-span cable-bearing bridge with great development potential. Compared with traditional cable-stayed bridges, the cable-stayed-suspension cooperative system bridge has a larger span and more scientific force; compared with traditional suspension bridges, the cable-stayed-suspension cooperative system bridge has better wind resistance and higher structural rigidity. The structure of the cable-stayed-suspension cooperative system bridge generally includes: bridge towers, stiffening beams, cable-stays, main cables, slings, anchors and foundations. From the distribution of cable-stays and slings, the stiffening beam section within the main span can be divided into: cable-stayed area, suspension area, and overlapping area.

[0003] In the construction of cable-stayed-cable cooperative system bridges, the closure of the bridge body generally includes two schemes, namely mid-span closure and overlapping area closure. Mid-span closure refers to the construction starting from the cable-stayed areas on both sides until the closure is carried out in the suspension area in the center of the bridge; overlapping area closure refers to the simultaneous construction of the cable-stayed areas on both sides and the central suspension area, and finally the closure is carried out in the overlapping area. It is not difficult to see that the overlapping area closure is more efficient than the mid-span closure, but during the construction of the overlapping area closure, the main beam and the main cable in the suspension area are generally temporarily connected by hinges, which has low stiffness, making the wind resistance of the main beam in the suspension area weak. At present, in order to improve the wind resistance of the main beam in the suspension area, cross cables, central buckles, vertical anchor cables, temporary connections, wind-resistant cables and other schemes are often used with reference to the wind resistance measures of conventional suspension bridges. The above schemes are not highly targeted to the characteristics of cable-stayed-cable cooperative system bridges, the control effect is not good, and the material consumption is large. Summary of the invention

[0004] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a main beam wind-resistant device and construction method for a cable-stayed-suspension cooperative system bridge during the construction period. Compared with the measures of traditional suspension bridges to improve the wind-resistant performance of the main beam in the suspension area, the present invention has the advantages of strong targeting, good wind-resistant control effect, and easy installation and application.

[0005] The technical solution of the present invention is: a wind-resistant device for the main beam of a cable-stayed-cable cooperative bridge during construction, comprising:

[0006] A first connection part, wherein the first connection part is fixedly connected to the main beam of the suspension area, and at least two groups of the first connection parts are respectively connected to both ends of the main beam of the suspension area, and the first connection parts are distributed on both sides of the main beam of the suspension area;

[0007] The second connection part is fixedly connected to the main beam of the inclined-stayed area, and at least two groups of the second connection parts are connected to one end of the main beam of the inclined-stayed area close to the main beam of the suspension area, and the second connection parts are distributed on both sides of the main beam of the inclined-stayed area;

[0008] a cross beam connected to the two main cables in the overlapped area;

[0009] An anchor cable, one end of which is connected to the first connection portion, the middle of which passes through the crossbeam, and the other end of which is connected to the second connection portion.

[0010] According to a cable-stayed-suspension cooperative system bridge main beam wind-resistant device during construction provided by the present application, the first connecting part includes an anchor ring and a base plate, the anchor ring is fixedly connected to the base plate for fixedly connecting the anchor cable; the base plate is fixedly connected to the main beam of the suspension area.

[0011] According to a cable-stayed-suspension cooperative system bridge main beam wind-resistant device during the construction period provided in the present application, the second connecting part includes a shell, a traction device and a steering groove, the shell is a cavity structure with an opening at one end; the traction device is connected to the anchor cable and installed in the shell to provide cable force for the anchor cable; the steering groove is connected at the opening of the shell to guide the anchor cable to turn.

[0012] According to a wind-resistant device for the main beam of a cable-stayed and suspension cooperative system bridge during the construction period provided in the present application, the traction device includes a slider, a screw rod and an anchor plate, the slider is connected to the anchor cable and can slide horizontally inside the shell; one end of the screw rod is connected to the slider, and the other end extends away from the opening of the shell and passes through the shell; the anchor plate is connected to one end of the screw rod passing through the shell, and is used to fix the screw rod and the slider.

[0013] According to a main beam wind-resistant device for a cable-stayed-suspension cooperative system bridge during construction provided by the present application, a cable clamp is connected to the crossbeam for connecting the main cable; turning holes are provided at both ends of the crossbeam for the anchor cable to pass through.

[0014] According to a main beam wind-resistant device for a cable-stayed-suspension cooperative system bridge during construction provided by the present application, the turning hole is a circular hole with arc chamfers at both ends to prevent the anchor cable from being damaged due to long-term friction.

[0015] According to a main beam wind-resistant device for a cable-stayed-suspension cooperative system bridge during construction provided in the present application, one end of the anchor cable is connected to the first connection part, and the other end is connected to the second connection part on the same side, and the middle of the anchor cable passes through one end on the opposite side of the beam.

[0016] According to a cable-stayed-suspension cooperative system bridge main beam wind-resistant device during construction provided by the present application, one end of the anchor cable is connected to the anchor ring of the first connecting part, and the other end is connected to the slider of the second connecting part on the same side. The middle of the anchor cable passes through the turning hole at the opposite end of the crossbeam, so that the anchor cable is in a broken line shape on the plane, and multiple anchor cables are connected in the above manner and cross each other.

[0017] Based on the same inventive concept, the present application also provides a construction method for a main beam wind resistance device during the construction period of any of the above-mentioned cable-stayed-suspension cooperative system bridges, comprising:

[0018] Preliminary preparation: assembling multiple sets of the first connecting parts, multiple sets of the second connecting parts and crossbeams;

[0019] Installing the first connection parts: fixing multiple groups of the first connection parts on both ends of the main beam of the suspension area and symmetrically distributing them on both sides of the main beam of the suspension area;

[0020] Installing the crossbeam: opening the cable clamp and putting the cable clamp on the main cable;

[0021] Installing the second connection parts: fixing a plurality of groups of the second connection parts on one end of the main beam of the inclined-stayed area close to the suspension area, and symmetrically distributing them on both sides of the main beam of the inclined-stayed area;

[0022] Install the anchor cable: connect one end of the anchor cable to the anchor ring of the first connecting part, pass the middle through the steering hole of the beam, and connect the other end of the anchor cable to the slider of the second connecting part;

[0023] Adjusting the anchor cable force: starting the traction device to tension the anchor cable to achieve a predetermined cable force;

[0024] According to a construction method for a main beam wind-resistant device during the construction period of a cable-stayed-suspension cooperative system bridge provided in the present application, one end of the anchor cable is connected to the anchor ring of the first connecting part, and the other end is connected to the slider of the second connecting part on the same side. The middle of the anchor cable passes through the turning hole at the opposite end of the crossbeam, so that the anchor cable is in a broken line shape on the plane; multiple anchor cables are connected in the above manner and cross each other.

[0025] According to a construction method provided by the present application, which is suitable for a main beam wind-resistant device during the construction period of a cable-stayed-suspension cooperative system bridge, the method of tensioning the anchor cable by the traction device is: sliding the slider in a direction away from the shell opening, and after the anchor cable reaches a predetermined cable force, connecting and fixing the anchor plate to one end of the screw rod passing through the shell to maintain the cable force of the anchor cable.

[0026] The advantages of this application are:

[0027] 1. The wind-resistant device of the present application is not only reasonable in structure and easy to install and apply, but also solves the problems of weak wind-resistant performance of the main beam in the suspension area during construction, and easy loosening of the anchor cable caused by large deformation of the main cable during construction. After simple modification, the device can also be used in the construction of the main beam of the suspension bridge;

[0028] 2. The first connection part of the present application is connected to the anchor cable through the anchor ring and fixedly connected to the main beam of the suspension area through the bottom plate. The structure is simple and reliable and easy to install and disassemble;

[0029] 3. The second connecting part of the present application not only connects the anchor cable but also provides cable force for the anchor cable, and the structure is simple and efficient;

[0030] 4. The traction device of the present application realizes the effect of tensioning the anchor cable through a simple mechanical structure, which is convenient for technicians to perform construction operations;

[0031] 5. The crossbeam of the present application can change the connection path of the anchor cable, further increasing the tension of the anchor cable to maintain a greater cable force;

[0032] 6. The two ends of the turning hole on the crossbeam of the present application are provided with arc chamfers, which can protect the anchor cable from damage due to long-term contact and friction with the crossbeam;

[0033] 7. The anchor cable connection path of the present application is in a broken line shape in the plane, which can further improve the wind resistance of the main beam in the suspension area and provide a stable and reliable construction environment for the closure operation in the overlapping area; BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the elevation structure of the main beam wind-resistant device during the construction period of the cable-stayed-cable cooperative system bridge of this application;

[0035] Figure 2 This is a schematic diagram of the plan structure of the main beam wind-resistant device during the construction period of the cable-stayed-suspension cooperative system bridge of this application;

[0036] Figure 3 This is a schematic diagram of the structure of the beam of this application;

[0037] Figure 4 This is a schematic diagram of the structure of the first connecting part of the present application;

[0038] Figure 5 This is a schematic diagram of the structure of the second connecting part of the present application;

[0039] Among them: 1-first connecting part; 11-anchor ring; 12-bottom plate; 2-second connecting part; 20-housing; 21-traction device; 211-slider; 212-screw rod; 213-anchor plate; 22-steering groove; 3-crossbeam; 31-cable clamp; 32-steering hole; 4-anchor cable. DETAILED DESCRIPTION

[0040] 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 with 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, and should not be construed as limiting the present invention.

[0041] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0043] The present invention relates to a wind-resistant device and construction method for the main beam of a cable-stayed and cable-suspension cooperative system bridge during the construction period. Compared with the measures for improving the wind-resistant performance of the main beam in the suspension area of ​​a traditional suspension bridge, the present invention installs a wind-resistant device in the overlapping area according to the characteristics of the cable-stayed and cable-suspension cooperative system bridge, and utilizes the stable structure of the cable-stayed area to improve the wind-resistant capacity of the main beam in the suspension area. This device not only has a good wind-resistant control effect, but also is easy to install and use.

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0045] A wind-resistant device for the main beam of a cable-stayed and cable-suspended bridge during construction, specifically, Figure 1 , 2As shown, it includes a first connection part 1, a second connection part 2, a cross beam 3 and an anchor cable 4, the first connection part 1 is fixedly connected to the main beam of the suspension area, and at least two groups of first connection parts 1 are respectively connected to the two ends of the main beam of the suspension area, and the first connection parts 1 are distributed on both sides of the main beam of the suspension area; the second connection part 2 is fixedly connected to the main beam of the cable-stayed area, and at least two groups of second connection parts 2 are connected to one end of the main beam of the cable-stayed area close to the main beam of the suspension area, and the second connection parts 2 are distributed on both sides of the main beam of the cable-stayed area; the cross beam 3 is connected to the two main cables in the overlapping area; one end of the anchor cable 4 is connected to the first connection part 1, passes through the cross beam 3 in the middle, and the other end is connected to the second connection part 2.

[0046] In fact, the present invention is a wind-resistant device for the main beam of the suspension area of ​​a cable-stayed-suspension cooperative system bridge, which is used for closing the overlapping area during the construction period. The working principle is to utilize the stability of the hyperstatic structure of the cable-stayed area to impose constraints on the main beam of the suspension area with weaker wind resistance, so as to improve the wind resistance of the main beam of the suspension area.

[0047] Among them, the second connection part 2 of the present invention is connected to the main beam of the cable-stayed area for connecting and utilizing the hyperstatic structure of the cable-stayed area; the first connection part 1 is connected to the main beam of the suspension area for imposing constraints on the main beam of the suspension area; the anchor cable 4 is a connecting structure, connecting the first connection part 1 and the second connection part 2 as a whole; the crossbeam 3 can further improve the connection strength of the anchor cable 4.

[0048] In some embodiments, Figure 4 As shown, the above-mentioned first connection part 1 is optimized. In this embodiment, the first connection part 1 includes an anchor ring 11 and a bottom plate 12. The anchor ring 11 is fixedly connected to the bottom plate 12 for fixedly connecting the anchor cable 4; the bottom plate 12 is fixedly connected to the main beam of the suspension area.

[0049] During actual installation, the anchor cable 4 is tied to the anchor ring 11; the anchor ring 11 is welded or bolted to the base plate 12; the base plate 12 is anchored to the main beam of the suspension area; wherein, the bottom area of ​​the base plate 12 is relatively large, which can increase the connection area between the first connection part 1 and the main beam of the suspension area, and improve the connection strength between the first connection part 1 and the main beam of the suspension area.

[0050] In some embodiments, Figure 5 As shown, the second connection part 2 is optimized. In this embodiment, the second connection part 2 includes a shell 20, a traction device 21 and a steering groove 22. The shell 20 is a cavity structure with an opening at one end; the traction device 21 is connected to the anchor cable 4 and is installed in the shell 20 to provide cable force for the anchor cable 4; the steering groove 22 is connected to the opening of the shell 20 to guide the anchor cable 4 to turn.

[0051] In actual operation, the shell 20 anchors the main beam of the inclined-stayed area; the traction device 21 connects the anchor cable 4; the steering groove 22 guides the anchor cable 4 to turn, so as to prevent the anchor cable 4 from directly contacting the opening edge of the shell 20 for a long time and causing damage due to friction.

[0052] In fact, the second connecting portion 2 not only connects the main beam of the cable-stayed area, but also provides cable force for the anchor cable 4: the traction device 21 not only connects the anchor cable 4, but also tensions the anchor cable 4 to provide cable force for the anchor cable 4.

[0053] In some embodiments, Figure 5 As shown, the traction device 21 is optimized. In this embodiment, the traction device 21 includes a slider 211, a screw rod 212 and an anchor plate 213. The slider 211 is connected to the anchor cable 4 and can slide horizontally inside the shell 20; one end of the screw rod 212 is connected to the slider 211, and the other end extends away from the opening of the shell 20 and passes through the shell 20; the anchor plate 213 is connected to one end of the screw rod 212 passing through the shell 20, and is used to fix the screw rod 212 and the slider 211.

[0054] In fact, a small anchor ring is connected to the slider 211, and the anchor cable 4 is knotted and tied to the small anchor ring; the slider 211 is welded together with the screw rod 212, and a thread is provided on the circumference of the screw rod 212; a hole is provided at one end of the shell 20 penetrated by the screw rod 212, and the screw rod 212 can slide horizontally through the hole; a threaded hole is opened on the anchor plate 213, and the thread on the threaded hole matches the thread on the circumference of the screw rod 212.

[0055] During actual operation, the wire rod 212 is pulled to make the slider 211 slide along the opening away from the shell 20, so that the anchor cable 4 is changed from a relaxed state to a tightened state. When the cable force of the anchor cable 4 reaches a predetermined value, the wire rod 212 is stopped from being pulled, and the anchor plate 213 is bolted to one end of the wire rod 212 passing through the shell 20 until the anchor plate 213 fits with the shell 20.

[0056] In some embodiments, Figure 3 As shown, the cross beam 3 is optimized. In this embodiment, a cable clamp 31 is connected to the cross beam 3 for connecting the main cable; turning holes 32 are opened at both ends of the cross beam 3 for the anchor cable 4 to pass through.

[0057] In fact, the crossbeam 3 is slidably connected to the two main cables in the overlapping area through the cable clamp 31. The crossbeam 3 can automatically adjust the connection position with the main cables according to the stress condition of the anchor cable 4; the anchor cable 4 can also slide relative to the crossbeam 3 through the steering hole 32 according to its own stress condition.

[0058] In some embodiments, Figure 3 As shown, the steering hole 32 is optimized. In this embodiment, the steering hole 32 is a circular hole with arc chamfers at both ends.

[0059] In actual operation, arc chamfers are provided at both ends of the circular hole turning hole 32 to prevent the anchor cable 4 from contacting sharp parts, thereby preventing the anchor cable 4 from being damaged due to long-term friction with sharp parts when sliding in the turning hole 32.

[0060] In some embodiments, Figure 1 , 2 As shown, the anchor cable 4 is optimized. In this embodiment, one end of the anchor cable 4 is connected to the anchor ring 11 of the first connecting part 1, and the other end is connected to the slider 211 of the second connecting part 2 on the same side. The middle of the anchor cable 4 passes through the turning hole 32 at the opposite end of the beam 3, so that the anchor cable 4 is in a broken line shape on the plane. Multiple anchor cables 4 are connected in the above manner and cross each other.

[0061] In actual work, the anchor cable 4 which is in a broken line shape on the plane essentially increases the connection path of the anchor cable 4, which can strengthen the tension state of the anchor cable 4 and increase the cable force of the anchor cable 4; at the same time, the wind-resistant device is expanded from the two-dimensional surface formed by the first connecting part 1, the second connecting part 2, the beam 3 and the anchor cable 4 on the same vertical plane to the three-dimensional space formed by the first connecting part 1 and the second connecting part 2 on the same side, the beam 3 on the opposite side, and the three-dimensionally connected anchor cables 4, thereby enhancing the stability of the wind-resistant device.

[0062] A construction method for a main beam wind-resistant device during the construction period of any of the above-mentioned cable-stayed-suspension cooperative system bridges is specifically as follows:

[0063] Preliminary preparation: assemble multiple sets of first connection parts 1: weld or bolt the anchor ring 11 and the bottom plate 12 together;

[0064] Assemble multiple sets of second connecting parts 2: connect the steering groove 22 to the opening of the housing 20, connect one end of the screw rod 212 to the slider 211, then place the screw rod 212 and the slider 211 in the housing 20 so that they can slide in the housing 20, extend the other end of the screw rod 212 away from the opening of the housing 20 and penetrate the housing 20, and then connect the anchor plate 213 to the end of the screw rod 212 that penetrates the housing 20;

[0065] Assemble the crossbeam 3: fix two cable clamps 31 to the two ends of the crossbeam 3 respectively, open a plurality of circular turning holes 32 at the two ends of the crossbeam 3 respectively, and perform rounding on the two ends of each prototype turning hole 32;

[0066] Install the first connection part 1: fix multiple groups of the first connection parts 1 to the two ends of the main beam of the suspension area, and symmetrically distribute them on both sides of the main beam of the suspension area;

[0067] Install the crossbeam 3: open the cable clamps 31, and respectively put two cable clamps 31 on the two main cables in the suspension area;

[0068] Install the second connection part 2: fix multiple groups of second connection parts 2 on one end of the main beam of the inclined-stayed area close to the suspension area, and symmetrically distribute them on both sides of the main beam of the inclined-stayed area;

[0069] Install the anchor cable 4: connect one end of the anchor cable 4 to the anchor ring 11 of the first connecting part 1, and pass the other end through the turning hole 32 of the beam 3 and connect to the slider 211 of the second connecting part 2;

[0070] Adjust the tension of the anchor cable 4: pull the screw rod 212 to make the slider 211 slide along the opening away from the shell 20, so that the anchor cable 4 changes from a relaxed state to a tightened state. When the tension of the anchor cable 4 reaches a predetermined value, stop pulling the screw rod 212 and bolt the anchor plate 213 to one end of the screw rod 212 passing through the shell 20 until the anchor plate 213 fits with the shell 20.

[0071] In some embodiments, Figure 1 , 2 As shown, the installation method of the anchor cable 4 is optimized. In this embodiment, one end of the anchor cable 4 is connected to the anchor ring 11 of the first connecting part 1, and the other end passes through the turning hole 32 at the opposite side end of the beam 3 and is connected to the slider 211 of the second connecting part 2 on the same side, so that the anchor cable 4 is in a broken line shape on the plane; multiple anchor cables 4 are connected in the above manner and cross each other.

[0072] In actual work, the anchor cable 4 which is in a broken line shape on the plane essentially increases the connection path of the anchor cable 4, which can strengthen the tension state of the anchor cable 4 and increase the cable force of the anchor cable 4; at the same time, the wind-resistant device is expanded from the two-dimensional surface formed by the first connecting part 1, the second connecting part 2, the beam 3 and the anchor cable 4 on the same vertical plane to the three-dimensional space formed by the first connecting part 1 and the second connecting part 2 on the same side, the beam 3 on the opposite side, and the three-dimensionally connected anchor cables 4, thereby enhancing the stability of the wind-resistant device.

[0073] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A wind-resistant device for the main beam of a cable-stayed and cable-suspended bridge during construction, characterized in that: include: A first connection part (1), the first connection part (1) is fixedly connected to the main beam of the suspension area, at least two groups of the first connection parts (1) are respectively connected to the two ends of the main beam of the suspension area, and the first connection parts (1) are distributed on both sides of the main beam of the suspension area; A second connection part (2), the second connection part (2) is fixedly connected to the main beam of the inclined-stayed area, at least two groups of the second connection parts (2) are connected to one end of the main beam of the inclined-stayed area close to the main beam of the suspension area, and the second connection parts (2) are distributed on both sides of the main beam of the inclined-stayed area; A cross beam (3), the cross beam (3) being connected to the two main cables in the overlapping area; An anchor cable (4), one end of the anchor cable (4) is connected to the first connection part (1), the middle passes through the crossbeam (3), and the other end is connected to the second connection part (2).

2. A wind-resistant device for main beams of a cable-stayed and cable-suspended bridge during construction as claimed in claim 1, characterized in that: The first connecting part (1) comprises an anchor ring (11) and a bottom plate (12); the anchor ring (11) is fixedly connected to the bottom plate (12) and is used for fixedly connecting the anchor cable (4); and the bottom plate (12) is fixedly connected to the main beam of the suspension area.

3. The wind-resistant device for main beams of a cable-stayed and cable-suspended bridge during construction as claimed in claim 1, characterized in that: The second connecting portion (2) comprises a shell (20), a traction device (21) and a steering groove (22); the shell (20) is a cavity structure with one end open; the traction device (21) is connected to the anchor cable (4) and installed in the shell (20) to provide cable force for the anchor cable (4); the steering groove (22) is connected to the opening of the shell (20) and is used to guide the anchor cable (4) to turn.

4. A wind-resistant device for main beams of a cable-stayed-suspension system bridge during construction as claimed in claim 3, characterized in that: The traction device (21) comprises a slider (211), a screw rod (212) and an anchor plate (213); the slider (211) is connected to the anchor cable (4) and can slide horizontally inside the housing (20); one end of the screw rod (212) is connected to the slider (211), and the other end extends away from the opening of the housing (20) and penetrates the housing (20); the anchor plate (213) is connected to one end of the screw rod (212) penetrating the housing (20) and is used to fix the screw rod (212) and the slider (211).

5. The wind-resistant device for main beams of a cable-stayed and cable-suspended bridge during construction as claimed in claim 1, characterized in that: The cross beam (3) is connected with a cable clamp (31) for connecting the main cable; and turning holes (32) are provided through both ends of the cross beam (3) for the anchor cable (4) to pass through.

6. A wind-resistant device for main beams of a cable-stayed and cable-suspended bridge during construction as claimed in any one of claims 1 to 5, characterized in that: One end of the anchor cable (4) is connected to the first connection part (1), and the other end is connected to the second connection part (2) on the same side, and the middle of the anchor cable (4) passes through one end on the opposite side of the crossbeam (3).

7. A wind-resistant device for main beams of a cable-stayed and cable-suspended bridge during construction as claimed in any one of claims 1 to 6, characterized in that: One end of the anchor cable (4) is connected to the anchor ring (11) of the first connecting part (1), and the other end is connected to the slider (211) of the second connecting part (2) on the same side. The middle of the anchor cable (4) passes through the turning hole (32) at the opposite end of the crossbeam (3), so that the anchor cable (4) is in a broken line shape on the plane. Multiple anchor cables (4) are connected in the above manner and cross each other.

8. A construction method for a main beam wind-resistant device during construction of a cable-stayed-suspension coordinated bridge according to any one of claims 1 to 7, characterized in that: include: Preliminary preparation: assembling multiple sets of the first connecting parts (1), multiple sets of the second connecting parts (2) and the crossbeam (3); Installing the first connection part (1): fixing a plurality of groups of the first connection parts (1) on both ends of the main beam of the suspension area and symmetrically distributing them on both sides of the main beam of the suspension area; Installing the crossbeam (3): opening the cable clamp (31) and sleeve the cable clamp (31) onto the main cable; Installing the second connection parts (2): fixing a plurality of groups of the second connection parts (2) on one end of the main beam of the inclined-stayed area close to the suspension area, and symmetrically distributing the plurality of groups of the second connection parts (2) on both sides of the main beam of the inclined-stayed area; Installing the anchor cable (4): connecting one end of the anchor cable (4) to the anchor ring (11) of the first connecting part (1), passing the middle through the steering hole (32) of the crossbeam (3), and connecting the other end of the anchor cable (4) to the slider (211) of the second connecting part (2); Adjusting the cable force of the anchor cable (4): starting the traction device (21) to tension the anchor cable (4) to achieve a predetermined cable force.

9. A method for constructing a main beam wind-resistant device during the construction period of a cable-stayed-suspension system bridge as claimed in claim 8, characterized in that: One end of the anchor cable (4) is connected to the anchor ring (11) of the first connecting part (1), and the other end passes through the steering hole (32) at the opposite end of the crossbeam (3) and is connected to the slider (211) of the second connecting part (2) on the same side, so that the anchor cable (4) is in a broken line shape on a plane; multiple anchor cables (4) are connected in the above manner and cross each other.

10. A method for constructing a main beam wind-resistant device during the construction period of a cable-stayed-suspension system bridge according to claim 9, characterized in that: The method for the traction device (21) to tension the anchor cable (4) is as follows: the slider (211) is slid in a direction away from the opening of the shell (20), and after the anchor cable (4) reaches a predetermined cable force, the anchor plate (213) is connected and fixed to one end of the screw rod (212) passing through the shell (20), so as to maintain the cable force of the anchor cable (4).

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