Wind-resistant cable structure convenient to install on pedestrian suspension bridge and construction method of wind-resistant cable structure

Abstract

The invention relates to a wind-resistant cable structure convenient to install on a pedestrian suspension bridge and a construction method of the wind-resistant cable structure. The method is suitable for the field of pedestrian suspension bridge design and construction. According to the technical scheme, the wind-resistant cable structure convenient to install on the pedestrian suspension bridge is characterized by being provided with a main beam, the main beam is hung on a main cable through slings, wind-resistant main cables arranged in the length direction of the main beam are arranged on the two sides of the main beam, the two ends of each wind-resistant main cable are anchored to the ground through wind-resistant anchors, and the wind-resistant main cables are connected with the main cable through the wind-resistant anchors. First connecting pieces are sequentially arranged on the wind-resistant main cable in the length direction of the wind-resistant main cable, second connecting pieces are sequentially arranged on the main beam in the length direction of the main beam, at least one inhaul cable structure is arranged between the main beam and the wind-resistant main cable in the length direction of the main beam, and each inhaul cable structure is provided with an inhaul cable. The inhaul cable shuttles between the first connecting piece on the wind-resistant main cable and the second connecting piece on the main beam.

Description

Technical Field

[0001] The invention relates to a wind-resistant cable structure which is easy to install on a pedestrian suspension bridge and a construction method thereof, and is applicable to the field of design and construction of pedestrian suspension bridges. Background Art

[0002] Pedestrian suspension bridges have become the main form of long-span bridges in tourist areas, mountain valleys, scenic waters, etc. due to their large span capacity, beautiful linear shape, and strong environmental adaptability. Compared with other types of bridges, pedestrian suspension bridges have the characteristics of light weight, small width-to-span ratio, small structural stiffness, and low natural vibration frequency. The structure is prone to torsion or lateral instability under wind loads.

[0003] In order to ensure that the pedestrian suspension bridge meets the requirements of normal use and wind resistance stability, setting up a wind-resistant cable system is a common structural measure. Existing studies have shown that the spatial wind-resistant cable can be regarded as a spring support with stiffness acting on the basic structural system, and the support stiffness has a significant impact on the static and dynamic characteristics of the bridge structure. The tensioned spatial wind-resistant cable can significantly improve the overall stiffness of the structure, reduce the vertical and lateral deformation of the structure under load, and greatly increase the frequencies of the key vibration modes of the structure, enhance the static wind stability and flutter stability of the overall structure, and meet the wind resistance stability requirements under extremely small width-span ratio conditions.

[0004] Conventional wind-resistant cable systems are mainly composed of wind-resistant main cables and cables, most of which are made of steel wire ropes. Existing research results show that wind-resistant cables are often arranged in parallel and straight pull, which can maximize the overall wind-resistant stability of the structure. However, in order to maintain the linear shape and tension, the current wind-resistant main cables and cables are generally connected by special fixed cable clamps. The installation position of the fixed cable clamps in the wind-resistant main cables and the segmented cutting lengths of each parallel straight cable must be accurately calculated, processed and laid out. The wind cable system has many installation procedures, difficult precision control, and difficult adjustment. During the installation stage, the linear shape of the wind cable and the segmented tension of the cable often deviate from the target value due to error factors such as bridge deck elevation, anchor point location, temperature measurement, calculation or installation. The cable has to be returned to the factory for adjustment, affecting the construction period and cost. In addition, steel wire ropes have the characteristics of large elastic modulus errors and easy relaxation, which further increases the difficulty of precise control of the linear shape and tension of the wind cable. Summary of the invention

[0005] The technical problem to be solved by the present invention is: In order to solve the above technical problem, the present invention provides a wind-resistant cable structure which is easy to install on a pedestrian suspension bridge and a construction method thereof.

[0006] The technical solution adopted by the present invention is: a wind-resistant cable structure that is easy to install on a pedestrian suspension bridge, connected between the main beam and the wind-resistant main cable, and the wind-resistant main cable is arranged at positions on both sides of the main beam, characterized in that: a first connector is sequentially arranged on the wind-resistant main cable along the length direction of the wind-resistant main cable, a second connector is sequentially arranged on the main beam along the length direction of the main beam, and at least one cable structure is installed between the main beam and the wind-resistant main cable along the length direction of the main beam, and a cable structure has a cable, and the cable shuttles between the first connector on the wind-resistant main cable and the second connector on the main beam, and the ends of the cable at both ends of the main beam are fixedly connected to the wind-resistant main cable through fixed connectors. In this way, when arranging the pedestrian suspension bridge, after the main beam is installed, the two ends of the wind-resistant main cable are anchored on the ground, and after one end of the cable is fixedly connected to the fixed connector at one end of the wind-resistant main cable, the cable is sequentially passed through the first connector and the second connector, and then fixedly connected to the fixed connector at the other end of the wind-resistant main cable. The cable structure arranged between the main beam and the wind-resistant main cable is composed of the same cable, avoiding the problem of connecting each cable between the main beam and the wind-resistant main cable separately when multiple cables arranged in parallel are set between the main beam and the wind-resistant main cable. This greatly reduces the cable cutting accuracy and installation difficulty, and greatly saves construction time. The cables at both ends of the main beam are fixedly connected to the wind-resistant main cable through fixed connectors, which can effectively avoid misoperation by personnel on the main beam during daily use. At the same time, the cables between the main beam and the wind-resistant main cable are formed into an outward-expanding structure at both ends, effectively improving the static and dynamic characteristics of the bridge structure.

[0007] The first connecting member has a lifting ring, which is installed on the wind-resistant main cable through a cable clamp, and a first pulley is installed on the lifting ring. The cable is installed on the first pulley, and the cable and the first pulley can slide relative to each other. In this way, when the cable is installed between the main beam and the wind-resistant main cable, the wear between the cable and the first connecting member is greatly reduced by installing the cable on the first pulley.

[0008] A limit rope clamp is installed on the cables on both sides of the first pulley. In this way, after the cable is tensioned and installed between the main beam and the wind-resistant main cable, the limit rope clamp can fix the cable on the first connecting member to avoid the cable and the first pulley from sliding relative to each other when the cable is installed between the main beam and the wind-resistant main cable, thereby preventing the internal force and linear shape from changing due to the relative sliding between the cable and the first pulley when the cable is subjected to force.

[0009] The second connecting member has a shackle mounted on the main beam lifting lug, a second pulley is mounted on the shackle, the cable is mounted on the second pulley, and the cable and the second pulley can slide relative to each other. In this way, when the cable is installed between the main beam and the wind-resistant main cable, the wear between the cable and the second connecting member is greatly reduced by installing the cable on the second pulley.

[0010] A limit rope clamp is installed on the cables on both sides of the second pulley. In this way, after the cables are tensioned and installed between the main beam and the wind-resistant main cable, the limit rope clamp can fix the cables on the second connecting member, thereby preventing the cables from sliding relative to the second pulley when subjected to force after the cables are installed between the main beam and the wind-resistant main cable, thereby preventing internal force and linear changes.

[0011] The fixed connection piece has a lifting ring, which is mounted on the wind-resistant main cable through a cable clamp, and a turnbuckle is mounted on the lifting ring, and the end of the cable is connected to the turnbuckle. In this way, it is convenient to connect the two ends of the cable to the wind-resistant main cable, and it is convenient to adjust the tension of the cable by adjusting the turnbuckle.

[0012] A fixed rope clamp is installed on the end of the cable installed on the turnbuckle. In this way, after the end of the cable is connected to the turnbuckle, the cable and the turnbuckle are connected together through the fixed rope clamp at the end of the cable to prevent the cable from falling off the turnbuckle.

[0013] The second connecting member on the main beam is arranged at a position corresponding to the position between the two first connecting members on the wind-resistant main cable, and the cables arranged between the main beam and the wind-resistant main cable form a triangular structure. In this way, the main beam, the cables and the wind-resistant main cable have a higher structural stability.

[0014] A construction method for a wind-resistant cable structure that is easy to install on a pedestrian suspension bridge, applied to the above-mentioned wind-resistant cable structure that is easy to install on a pedestrian suspension bridge and its construction method, characterized in that:

[0015] The main beam is suspended on the main cable through slings;

[0016] Wind-resistant anchors are anchored on the ground on both sides of the main beam ends;

[0017] Install the assembled lifting ring and the first pulley at the corresponding position on the wind-resistant main cable through the cable clamp (calculated and determined in advance);

[0018] Connect the two ends of the two wind-resistant main cables to the wind-resistant anchors on both sides of the main beam;

[0019] Install the assembled shackle and second pulley on the lifting lugs on the main beam;

[0020] After the cable is passed between the main beam and the wind-resistant main cable, the ends of the cable at both ends of the main beam are fixedly connected to the wind-resistant main cable by assembling the turnbuckles and the lifting rings together;

[0021] Fixed rope clamps are installed at the ends of the cables at both ends of the main beam, and limited rope clamps are installed on the cables at both sides of the first pulley and the second pulley.

[0022] The beneficial effects of the present invention are as follows: the present invention only sets one cable between the main beam and the wind-resistant main cable, so that the cable shuttles back and forth between the main beam and the wind-resistant main cable, and the two ends of the cable are fixedly connected to the wind-resistant main cable, so that only the two ends of one cable need to be fixedly connected to the wind-resistant main cable, avoiding the need to connect each cable to the main beam and the wind-resistant main cable when multiple cables are set between the main beam and the wind-resistant main cable, thereby greatly reducing the structural calculation accuracy, segment processing accuracy and construction difficulty; the present invention makes the cable between the main beam and the wind-resistant main cable shuttle back and forth, so that the cable forms a triangular structure with high structural strength; the present invention installs a second pulley on the main beam through a shackle, so that the cable can cooperate with the second pulley when passing through the main beam, thereby avoiding the wear of the cable during the installation process; The present invention installs the first pulley on the wind-resistant main cable through a cable clamp, so that the cable can cooperate with the first pulley when passing through the wind-resistant main cable, thereby avoiding wear of the cable during the installation process; the present invention installs the end of the cable on the wind-resistant main cable through a basket screw, so that the tension of the cable can be adjusted by adjusting the basket screw after the cable is installed between the main beam and the wind-resistant main cable; the present invention installs fixed rope clamps at the end positions of the cable at both end positions on the main beam, and limiting rope clamps are installed on the cable at both sides of the first pulley and the second pulley, so that the cable line shape and internal force can be fixed by the limiting rope clamp and the fixed rope clamp after the cable is installed on the main beam and the main cable; the present invention avoids the specially designed connecting device required for the installation of traditional parallel straight-pull cables through a reasonable combination of various finished product procurement components, thereby effectively reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a general plan view of the present invention.

[0024] Figure 2 yes Figure 1 Schematic diagram of the structure at point A in the middle.

[0025] Figure 3 It is a side view of the structure in which the cables in the present invention are connected between the main beam and the wind-resistant main cable.

[0026] Figure 4 yes Figure 1 Schematic diagram of the structure at point B in the middle.

[0027] Figure 5 yes Figure 1 Schematic diagram of the structure at point C in the middle.

[0028] Figure 6 yes Figure 1 Schematic diagram of the structure at point D in the middle.

[0029] Figure 7 yes Figure 1 Schematic diagram of the structure at E in the middle.

[0030] Figure 8 It is a structural schematic diagram of the second connecting member installed on the main beam in the present invention.

[0031] Fig. 9 It is a structural schematic diagram of the first connecting member installed on the wind-resistant main cable in the present invention.

[0032] Fig.10 It is an installation schematic diagram of the present invention.

[0033] In the figure: 1. Wind-resistant anchor; 2. Lifting eye; 3. Wind-resistant main cable; 4. Pull rope; 5. Shackle; 6. Second pulley; 7. First pulley; 8. Lifting ring; 9. Rope clamp; 10. Limiting rope clamp; 11. Main beam; 12. Turnbuckle; 13. Fixed rope clamp. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0035] Embodiment 1 is a wind-resistant cable structure that is easy to install on a pedestrian suspension bridge, connected between a main beam 11 and a wind-resistant main cable 3, the main beam 11 is suspended on the main cable by a sling, wind-resistant anchors 1 are anchored on the ground on both sides of the main beam 11, wind-resistant main cables 3 are arranged along the length direction of the main beam 11 on both sides of the main beam 11, both ends of the wind-resistant main cable 3 are connected to the anchor 1, and a cable structure is arranged between the main beam 11 and the wind-resistant main cable 3.

[0036] In this embodiment, the cable 4 structure has a cable 4, both ends of which are connected to the wind-resistant main cable 3. The cable 4 shuttles between the main beam 11 and the wind-resistant main cable 3, thereby connecting the main beam 11 and the wind-resistant main cable 3 together.

[0037] In this embodiment, a plurality of lifting eyes 2 are provided on the main beam 11 along the length direction of the main beam 11, and a second connecting member is installed on the lifting eyes 2, wherein a shackle 5 is installed on the lifting eyes 2, and a second pulley 6 is installed on the shackle 5. In this way, when the cable 4 passes through the main beam 11, the cable 4 is installed on the second pulley 6. Under the action of the second pulley 6, the wear of the cable 4 can be reduced when the cable 4 is installed between the main beam 11 and the wind-resistant main cable 3. By removing the shackle 5, it is convenient to remove the second pulley 6 from the main beam 11 and replace it.

[0038] In this embodiment, a plurality of first connecting members are arranged on the wind-resistant main cable 3 along the length direction of the wind-resistant main cable 3. The first connecting member has a lifting ring 8, which is installed on the wind-resistant main cable 3 through a cable clamp 9, and a first pulley 7 is installed on the lifting ring 8. In this way, when the cable 4 passes through the wind-resistant main cable 3, the cable 4 is installed on the first pulley 7. Under the action of the first pulley 7, the wear of the cable 4 can be reduced when the cable 4 is installed between the main beam 11 and the wind-resistant main cable 3. By removing the cable clamp 9, it is convenient to remove the second pulley 6 from the main beam 11 and replace it.

[0039] In this embodiment, both ends of the cable 4 are fixedly connected to the wind-resistant main cable 3 through a fixed connector. The fixed connector has a lifting ring 8 installed on the wind-resistant main cable 3, a turnbuckle is installed on the lifting ring 8, and the end of the cable 4 is connected to the turnbuckle. In this way, after the cable 4 is connected between the main beam 11 and the wind-resistant main cable 3, the cable 4 can be tightened by adjusting the turnbuckle, and the tension of the cable 4 can be adjusted by adjusting the turnbuckle later.

[0040] In this embodiment, fixed rope clamps 13 are installed at the ends of the cables 4 at both ends of the main beam 11, and limited rope clamps 10 are installed on the cables 3 at both sides of the first pulley 6 and the second pulley 7. In this way, after the cables 4 are installed between the main beam 11 and the wind-resistant main cable 3, the limited rope clamps 10 and the fixed rope clamps 13 are installed on the cables 4 to prevent the cables 4 from slipping, causing internal force and linear changes, and affecting the wind-resistant stability of the pedestrian suspension bridge.

[0041] In this embodiment, the second connecting member on the main beam 11 is arranged at a position corresponding to the position between the two first connecting members on the wind-resistant main cable 3, and the cable 4 arranged between the main beam 11 and the wind-resistant main cable 3 forms a triangular structure; both ends of the cable 4 are installed on the wind-resistant main cable 3, so that the cable 4 between the main beam 11 and the wind-resistant main cable 3 forms an outward expansion structure at both ends. In this way, the pedestrian suspension bridge has higher static and dynamic characteristics.

[0042] The operation method of this embodiment is:

[0043] The main beam 11 is suspended on the main cable through the sling;

[0044] Wind-resistant anchors 1 are anchored on the ground at both sides of the ends of the main beam 11;

[0045] Install the assembled lifting ring 8 and the first pulley 7 at corresponding positions on the wind-resistant main cable 3 through the cable clamp 9;

[0046] Connect the two ends of the two wind-resistant main cables 3 to the wind-resistant anchors 1 at the two ends of the main beam 11 respectively;

[0047] Install the assembled shackle 5 and the second pulley 6 on the lifting lug 2 on the main beam 11;

[0048] After the cable 4 is passed between the main beam 11 and the wind-resistant main cable 3, the ends of the cable 4 at both ends of the main beam 11 are fixedly connected to the wind-resistant main cable 3 by assembling the turnbuckles and the eyelets 8 together;

[0049] Fixed rope clamps 13 are installed at the ends of the cables 4 at both ends of the main beam 11 , and limited rope clamps 10 are installed at both sides of the first pulley 6 and the second pulley 7 on the cables 3 .

[0050] Embodiment 2 is a wind-resistant cable structure that is easy to install on a pedestrian suspension bridge, which is substantially the same as embodiment 1, except that, in this embodiment, multiple cable structures 4 need to be arranged between the main beam 11 and the wind-resistant main cable 3. Between two adjacent cable structures, the ends of the cables 4 of the two cable structures are connected to the same shackle 5, which is installed on the lifting lug 2 of the main beam 11. The ends of the cables 4 installed on the same shackle 5 are all installed with limit rope clamps 10.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wind-resistant cable structure that is easy to install on a pedestrian suspension bridge, connected between a main beam (11) and a wind-resistant main cable (3), wherein the wind-resistant main cable (3) is arranged at positions on both sides of the main beam (11), characterized in that: A first connecting piece is sequentially arranged on the wind-resistant main cable (3) along the length direction of the wind-resistant main cable (3), a second connecting piece is sequentially arranged on the main beam (11) along the length direction of the main beam (11), at least one cable structure is installed between the main beam (11) and the wind-resistant main cable (3) along the length direction of the main beam (11), a cable structure has a cable (4), the cable (4) shuttles between the first connecting piece on the wind-resistant main cable (3) and the second connecting piece on the main beam (11), and the ends of the cable (4) at both end positions on the main beam are fixedly connected to the wind-resistant main cable (3) through fixed connecting pieces.

2. The wind-resistant cable structure that is easy to install on a pedestrian suspension bridge according to claim 1, characterized in that: The first connecting member has a lifting ring (8), the lifting ring (8) is installed on the wind-resistant main cable (3) through a cable clamp (9), a first pulley (7) is installed on the lifting ring (8), and the cable (4) is installed on the first pulley (7).

3. The wind-resistant cable structure that is easy to install on a pedestrian suspension bridge according to claim 2, characterized in that: Limiting rope clamps (10) are installed on the cables (4) on both sides of the first pulley (7).

4. The wind-resistant cable structure that is easy to install on a pedestrian suspension bridge according to claim 1, characterized in that: The second connecting member comprises a shackle (5) mounted on the lifting lug (2) of the main beam (11), a second pulley (6) is mounted on the shackle (5), and the cable (4) is mounted on the second pulley (6).

5. The wind-resistant cable structure that is easy to install on a pedestrian suspension bridge according to claim 4, characterized in that: Limiting rope clamps (10) are installed on the cables (4) on both sides of the second pulley (6).

6. The wind-resistant cable structure that is easy to install on a pedestrian suspension bridge according to claim 1, characterized in that: The fixed connection part has a lifting ring (8), which is installed on the wind-resistant main cable (3) through a cable clamp (9), and a turnbuckle (12) is installed on the lifting ring (8), and the end of the cable (4) is connected to the turnbuckle.

7. The wind-resistant cable structure that is easy to install on a pedestrian suspension bridge according to claim 6, characterized in that: A fixed rope clamp (13) is installed on the end of the pull rope (4) installed on the turnbuckle.

8. The wind-resistant cable structure that is easy to install on a pedestrian suspension bridge according to claim 1, characterized in that: The second connecting member on the main beam (11) is arranged at a position corresponding to the position between the two first connecting members on the wind-resistant main cable (3), and the cable (4) arranged between the main beam (11) and the wind-resistant main cable (3) forms a triangular structure.

9. A construction method for a wind-resistant cable structure that is easy to install on a pedestrian suspension bridge, applied to a wind-resistant cable structure that is easy to install on a pedestrian suspension bridge as claimed in any one of claims 1 to 8, characterized in that: The main beam (11) is suspended on the main cable by means of a sling, and both ends of the main cable are turned at the top of the bridge tower and then anchored on the gravity anchors on both sides; Wind-resistant anchors (1) are anchored on the ground at both sides of the ends of the main beam (11); The assembled lifting ring (8) and the first pulley (7) are installed at corresponding positions on the wind-resistant main cable (3) through a cable clamp (9); Connecting two ends of two wind-resistant main cables (3) to wind-resistant anchors (1) at two ends of the main beam (11); Installing the assembled shackle (5) and the second pulley (6) on the lifting lug (2) on the main beam (11); After the cable (4) is passed between the main beam (11) and the wind-resistant main cable (3), the ends of the cable (4) at both ends of the main beam (11) are fixedly connected to the wind-resistant main cable (3) by assembling a turnbuckle (12) and a lifting ring (8) together; Fixed rope clamps (13) are installed at the ends of the cable (4) at both ends on the main beam (11), and limited rope clamps (10) are installed on the cable (4) at both sides of the first pulley (7) and the second pulley (6).

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