Bridge girder cable replacement device

Abstract

The utility model provides a kind of approach bridge sling replacement device, comprising: for fixing the hoop of arch rib, arch upper crossbeam, bridge lower crossbeam, steel strand and multiple anchorage devices;Arch upper crossbeam is set in the upper of hoop, and is connected with arch rib by hoop;Bridge lower crossbeam is located below the bridge deck of approach bridge, and is connected with the tie beam of approach bridge;Steel strand is located between arch upper crossbeam and bridge lower crossbeam, and steel strand passes through bridge deck, and is connected with arch upper crossbeam above bridge deck and bridge lower crossbeam below bridge deck;Arch upper crossbeam and bridge lower crossbeam are both provided with anchorage device, and both ends of steel strand are connected with anchorage device on arch upper crossbeam and anchorage device at bridge lower crossbeam respectively.The utility model solves the problem that approach bridge sling replacement is easy to damage bridge body in prior art.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction, and more specifically, to a bridge approach cable replacement device. Background Technology

[0002] In the field of bridge maintenance and replacement technology, traditional methods for replacing suspenders and temporary support systems have certain limitations and risks. Taking a wharf steel trestle bridge as an example, the wharf steel trestle bridge is designed as a tied arch bridge with a steel-concrete composite under-deck structure, using flexible suspenders to connect the suspending points to the arch ribs to balance the horizontal thrust generated by the arch ribs. However, during the suspender replacement operation, how to safely and efficiently complete the suspender replacement without damaging the original bridge structure has become a technical challenge. In existing technologies, replacing suspenders usually requires setting up temporary support structures on the bridge to maintain the stability of the bridge and ensure that the structural safety of the bridge is not compromised during the replacement process. However, the setting of such temporary support systems is often quite complex, requiring consideration of the bridge's dynamic and static loads, as well as the special characteristics of the bridge structure. For example, traditional temporary supports may directly act on the bridge deck or crossbeams, which not only increases the potential damage to other parts of the bridge during suspender replacement, but also, in actual operation, due to the lack of refined control methods, it is difficult to ensure the stability and accuracy of the temporary supports, which may lead to changes in the stress state of the bridge structure, affecting the bridge's load-bearing capacity and safety. Utility Model Content

[0003] The main purpose of this utility model is to provide a bridge approach cable replacement device to solve the problem that bridge approach cable replacement in the prior art is prone to damage to the bridge structure.

[0004] To achieve the above objectives, according to one aspect of the present invention, a bridge approach cable replacement device is provided, comprising: a clamp for fixing the arch rib of the approach bridge, an upper arch crossbeam, a lower bridge crossbeam, steel strands, and multiple anchors; the upper arch crossbeam is disposed above the clamp and connected to the arch rib via the clamp; the lower bridge crossbeam is located below the bridge deck of the approach bridge and is connected to the tie beam of the approach bridge; the steel strands are located between the upper arch crossbeam and the lower bridge crossbeam, passing through the bridge deck and connecting the upper arch crossbeam located above the bridge deck and the lower bridge crossbeam located below the bridge deck; anchors are provided at both the upper arch crossbeam and the lower bridge crossbeam, and the two ends of the steel strands are respectively connected to the anchors on the upper arch crossbeam and the anchors at the lower bridge crossbeam.

[0005] Furthermore, the approach bridge cable replacement device also includes a flexible component for anti-slip purposes, located between the clamp and the arch rib.

[0006] Furthermore, the approach bridge cable replacement device also includes a leveling structure located between the clamp and the upper crossbeam of the arch, used to level the lower surface of the upper crossbeam of the arch.

[0007] Furthermore, the upper crossbeam extends a predetermined length above the arch rib, and there are partial upper crossbeams extending on both sides of the arch rib. There are multiple steel strands, and steel strands are installed at the upper crossbeams on both sides of the arch rib.

[0008] Furthermore, the width of the bridge underbeam is greater than the width of the tie beam, and the center line of the bridge underbeam along the length direction is aligned vertically with the center line of the tie beam along the length direction. Steel strands are threaded through both sides of the width of the bridge underbeam where it protrudes from the tie beam.

[0009] Furthermore, there are multiple steel strands along the extension direction of the arch rib, and steel strands are installed on both sides of the suspension cables of the approach bridge to be replaced.

[0010] Furthermore, the distance between the steel strands on both sides of the sling to be replaced is 3-5m.

[0011] Furthermore, the anchor includes a first anchor and a second anchor. The first anchor is connected to the upper crossbeam of the arch and includes a tensioning member located above the arch rib for tensioning the steel strands. The second anchor is located below the lower crossbeam of the bridge and is used to fix the ends of the steel strands.

[0012] Furthermore, the crossbeams under the bridge are steel support beams.

[0013] Furthermore, the clamps are installed in pairs, and the pairs of clamps are connected by screws.

[0014] By applying the technical solution of this utility model, the installation of clamps and upper crossbeams allows the cable replacement device to be connected to the arch rib of the approach bridge, and the installation of lower crossbeams allows the cable replacement device to be connected to the bridge deck of the approach bridge. The upper and lower crossbeams are connected by steel strands and anchors, thereby connecting the arch rib and the bridge deck. This temporarily replaces the cable in bearing the force between the arch rib and the bridge deck, thus preventing displacement or deformation of the arch rib during cable replacement and ensuring that the arch rib and the bridge deck are not damaged, thereby ensuring the stability and safety of the entire bridge structure. Specifically, in this embodiment, the clamps can be firmly fixed to the arch ribs, and in turn, the upper arch beams can be fixed to the arch ribs. The upper arch beams not only serve as temporary construction platforms, but also, through their connection with the clamps, can evenly transfer the temporarily applied loads to the arch ribs, avoiding local stress concentration. The lower arch beams connect with the tie beams under the bridge deck to form a stable support structure, ensuring that the bridge deck is not damaged during cable replacement. The steel strands, as the load-bearing elements of the temporary replacement cables, can simulate the working state of the original cables by passing through the bridge deck and connecting the upper arch beams and the lower arch beams, ensuring the load-bearing capacity and safety of the bridge during cable replacement. Multiple anchors ensure that the steel strands can be reliably fixed and tensioned, guaranteeing the stability and reliability of the temporary cable system. This allows for efficient and safe completion of cable replacement tasks, avoiding potential damage to the bridge structure caused by traditional replacement methods, and improving the quality and efficiency of bridge maintenance work. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0016] Figure 1 A partial front view of the approach bridge cable replacement device of this utility model at the arch rib is shown;

[0017] Figure 2 It shows Figure 1 Cross-sectional view;

[0018] Figure 3 A partial front view of the approach bridge cable replacement device at the bridge deck is shown.

[0019] The above figures include the following reference numerals:

[0020] 10. Hoop; 20. Arch crossbeam; 30. Under-bridge crossbeam; 40. Steel strand; 50. Anchor; 51. First anchor; 511. Tensioner; 52. Second anchor; 60. Leveling structure; 70. Arch rib; 80. Bridge deck. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0023] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0024] To address the problem that replacing approach bridge cables in existing technologies can easily damage the bridge structure, this utility model provides an approach bridge cable replacement device.

[0025] like Figures 1 to 3 The illustrated approach bridge cable replacement device includes: a clamp 10 for fixing the arch rib 70 of the approach bridge, an upper arch crossbeam 20, a lower bridge crossbeam 30, steel strands 40, and multiple anchors 50; the upper arch crossbeam 20 is positioned above the clamp 10 and connected to the arch rib 70 via the clamp 10; the lower bridge crossbeam 30 is located below the bridge deck 80 of the approach bridge and is connected to the tie beam of the approach bridge; the steel strands 40 are located between the upper arch crossbeam 20 and the lower bridge crossbeam 30, passing through the bridge deck 80 and connecting the upper arch crossbeam 20 above the bridge deck 80 and the lower bridge crossbeam 30 below the bridge deck 80; anchors 50 are provided at both the upper arch crossbeam 20 and the lower bridge crossbeam 30, and the two ends of the steel strands 40 are connected to the anchors 50 on the upper arch crossbeam 20 and the lower bridge crossbeam 30, respectively.

[0026] In this embodiment, the installation of clamps 10 and upper arch crossbeams 20 enables the cable replacement device to connect to the arch ribs 70 of the approach bridge, and the installation of lower arch crossbeams 30 enables the cable replacement device to connect to the bridge deck 80 of the approach bridge. The upper arch crossbeams 20 and lower arch crossbeams are connected by steel strands 40 and anchors 50, thereby connecting the arch ribs 70 and the bridge deck 80. This temporarily replaces the cable in bearing the force between the arch ribs 70 and the bridge deck 80, thus preventing displacement or deformation of the arch ribs 70 during cable replacement, while ensuring that the arch ribs 70 and the bridge deck 80 are not damaged, thereby ensuring the stability and safety of the entire bridge structure. Specifically, in this embodiment, the clamp 10 can be firmly fixed to the arch rib 70, and then the upper arch beam 20 can be fixed to the arch rib 70. The upper arch beam 20 can not only serve as a temporary construction platform, but also, through its connection with the clamp 10, can evenly transfer the temporarily applied load to the arch rib 70, avoiding local stress concentration. The function of the lower bridge beam 30 is to connect with the tie beam under the bridge deck 80 to form a stable support structure, ensuring that the bridge deck 80 is not damaged during the replacement of the suspension cables. The steel strand 40, as a temporary replacement suspension cable bearing element, can simulate the working state of the original suspension cable by passing through the bridge deck 80 and connecting the upper arch beam 20 and the lower bridge beam 30, ensuring the load-bearing capacity and safety of the bridge during the replacement of the suspension cables. Multiple anchors 50 enable the steel strand 40 to be reliably fixed and tensioned, ensuring the stability and reliability of the temporary suspension cable system, thereby enabling the suspension cable replacement task to be completed efficiently and safely, avoiding the damage to the bridge structure that may be caused by traditional replacement methods, and improving the quality and efficiency of bridge maintenance work.

[0027] In this embodiment, the approach bridge cable replacement device also includes a flexible component for anti-slip purposes. This flexible component is located between the clamp 10 and the arch rib 70, thereby increasing the coefficient of friction between the clamp 10 and the arch rib 70. This prevents the clamp 10 from sliding relative to the arch rib 70 during tensioning of the steel strand 40 or cable replacement, thus ensuring the stability of the approach bridge cable replacement device. Specifically, the flexible component in this embodiment can be a rubber pad. The deformation of the rubber pad adapts to the irregular shape of the arch rib 70 surface, thereby increasing the anti-slip properties between the clamp 10 and the arch rib 70. An anti-slip test is conducted before construction to improve the safety and reliability of the entire approach bridge cable replacement device, while avoiding damage to the arch rib 70 caused by hard contact between the clamp 10 and the arch rib 70.

[0028] In this embodiment, the approach bridge cable replacement device also includes a leveling structure 60, located between the clamp 10 and the upper arch beam 20. The leveling structure 60 is used to level the lower surface of the upper arch beam 20, ensuring that the upper arch beam 20 remains horizontal during installation. Specifically, the leveling structure 60 can be configured as a pad, with its lower surface shape matching the upper surface shape of the clamp 10. The leveling structure 60 is installed along the surface of the clamp 10, allowing it to be stably fixed directly above the clamp 10 and ensuring uniform stress on the upper surface of the clamp 10, thus guaranteeing the safety of the arch rib 70. The upper surface of the leveling structure 60 can be flat, and after installation, its upper surface is kept horizontal to facilitate the installation of the upper arch beam 20. Preferably, the width of the leveling structure 60 is greater than the width of the upper arch beam 20, ensuring the reliability of the upper arch beam 20 installation. It should be noted that the lower surface of the arch upper crossbeam 20 used for leveling refers to the arch upper crossbeam 20 in this embodiment, which needs to be installed directly above the clamp 10. Since the arch upper crossbeam 20 needs to be installed horizontally, a leveling structure 60 is required. The upper surface of the leveling structure 60 is kept horizontal, and the arch upper crossbeam 20 is installed on the upper surface of the leveling structure 60, thus ensuring that the lower surface of the arch upper crossbeam 20 remains horizontal during installation. The width direction of both the leveling structure 60 and the arch upper crossbeam 20 refers to the extension direction of the arch rib 70, i.e. Figure 1 The left and right directions in the middle.

[0029] like Figure 2 As shown, in this embodiment, the upper arch beam 20 extends a predetermined length above the arch rib 70, and a portion of the upper arch beam 20 extends from both sides of the arch rib 70. Multiple steel strands 40 are present, and steel strands 40 are installed at the upper arch beams 20 on both sides of the arch rib 70, thereby ensuring that the arch rib 70 is evenly stressed on both sides and that the load is evenly distributed. Specifically, the upper arch beam 20 can be configured as a rectangular beam, with its length direction perpendicular to the extension direction of the arch rib 70 and spanning both sides of the arch rib 70. This allows for the installation of steel strands 40 and anchors 50 on both sides of the arch rib 70 to connect the arch rib 70 and the bridge deck 80, thus ensuring the structural stability of the approach bridge during cable replacement.

[0030] like Figure 3As shown, in this embodiment, the width of the under-bridge crossbeam 30 is greater than the width of the tie beam, and the centerline of the under-bridge crossbeam 30 along its length is aligned vertically with the centerline of the tie beam along its length. Steel strands 40 are threaded through both sides of the under-bridge crossbeam 30 where it protrudes from the tie beam, thereby increasing the support area of ​​the under-bridge crossbeam 30 and improving its load-bearing capacity. This also facilitates the threading of the steel strands 40, ensuring the stability and reliability of the approach bridge cable replacement device. Specifically, the under-bridge crossbeam 30 can also be a rectangular steel beam, which can be made of H-beams. A tie beam is typically installed beneath the bridge deck 80. A sub-bridge crossbeam 30 can be installed directly beneath the tie beam, with symmetrical sub-bridge crossbeams 30 on opposite sides of the tie beam. The sub-bridge crossbeams 30 can be installed along the length of the tie beam. Steel strands 40 are installed vertically, with their lower ends fixed to the sub-bridge crossbeams 30. This transfers the load of the bridge deck 80 to the sub-bridge crossbeams 30 and steel strands 40, ensuring the load-bearing capacity and safety of the approach bridge cable replacement device during cable replacement. Holes are drilled in the bridge deck 80, and the steel strands 40 connect to the arch crossbeam 20 through these holes. After passing through the bridge deck 80, the steel strands 40 pass vertically through both sides of the tie beam and are fixedly connected to the sub-bridge crossbeams 30 protruding from the tie beam, thus avoiding the need for drilling holes in the tie beam.

[0031] In this embodiment, multiple steel strands 40 are arranged along the extension direction of the arch rib 70. Steel strands 40 are installed on both sides of the approach bridge cable to be replaced, ensuring that the temporary cable system can evenly bear and transfer the load, avoiding localized stress concentration, and thus improving safety during cable replacement. In other words, steel strands 40 are arranged in all four directions around the cable, ensuring the load-bearing capacity of the approach bridge cable replacement device and guaranteeing its ability to temporarily replace the cable in bearing the load, thereby ensuring safety during the cable replacement process.

[0032] In this embodiment, based on considerations of the stability of the bridge structure, the distance between the steel strands 40 on both sides of the cable to be replaced is 3-5m, preferably 4m, to ensure that the approach bridge cable replacement device can provide sufficient support, while not being too dense to cause resource waste, thereby improving replacement efficiency and economy at the same time, and ensuring the structural safety of the bridge during the cable replacement process.

[0033] In this embodiment, the anchor 50 includes a first anchor 51 and a second anchor 52. The first anchor 51 is connected to the upper crossbeam 20 of the arch and includes a tensioning member 511 located above the arch rib 70 for tensioning the steel strand 40. The second anchor 52 is located below the lower crossbeam 30 of the bridge and is used to fix the end of the steel strand 40, thereby ensuring that the steel strand 40 can be firmly fixed and tensioned, thus providing reliable load-bearing capacity. Specifically, the tensioning member 511 of the first anchor 51 is located above the upper crossbeam 20 of the arch and can adjust the tension of the steel strand 40 by tensioning to ensure that it can withstand the design load. Optionally, the tensioning member 511 can be a jack, and a steel pad can be set between the jack and the upper crossbeam 20 to ensure the tensioning effect of the jack. The second anchor 52 also includes a front tool anchor and a rear tool anchor. The top of the second anchor 52 is equipped with a rear tool anchor and an anti-loosening device, while the front tool anchor is located between the steel pad and the upper arch beam 20. The front tool anchor is mainly used to fix the steel strand 40 to be tensioned, ensuring that the steel strand 40 is stably anchored to the upper arch beam 20 during tensioning, thus ensuring the transmission of tension force and the stability of the structure. The rear tool anchor is used to anchor the steel strand 40 after tensioning. The rear tool anchor can bear and maintain the prestress of the steel strand 40, thereby ensuring the safety and load-bearing capacity of the approach bridge cable replacement device during cable replacement. The front and rear tool anchors work together to ensure the smooth progress of cable replacement. The second anchor 52 is used to fix the lower end of the steel strand 40 to prevent displacement during tensioning or use.

[0034] In this embodiment, the under-bridge crossbeam 30 is a steel support beam, thereby ensuring that the under-bridge crossbeam 30 has high strength and load-bearing capacity and can provide stable support.

[0035] In this embodiment, the clamps 10 are installed in pairs and connected by screws to ensure that the clamps 10 are firmly fixed to the arch rib 70, preventing displacement or deformation of the arch rib 70 during cable replacement. The connection of the clamps 10 in pairs with screws enhances their overall stability and improves their anti-slip capability. Specifically, the two clamps 10 in pairs are fixed to the upper and lower chords of the approach bridge, respectively, and are connected and anchored by high-strength screws. After the clamps 10 are installed, the leveling structure 60 and the upper arch beam 20 are installed above the clamps 10 using a bridge inspection vehicle, thus ensuring the safety of the entire approach bridge cable replacement device.

[0036] It should be noted that "multiple" in the above embodiments refers to at least two.

[0037] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0038] 1. To solve the problem that replacing approach bridge suspension cables in existing technologies easily damages the bridge structure;

[0039] 2. The installation of clamps and upper crossbeams allows the cable replacement device to connect to the arch ribs of the approach bridge, while the installation of lower crossbeams allows it to connect to the bridge deck. The upper and lower crossbeams are connected by steel strands and anchors, thus connecting the arch ribs and the bridge deck. This temporarily replaces the cables in bearing the forces between the arch ribs and the bridge deck, preventing displacement or deformation of the arch ribs during cable replacement. It also ensures that the arch ribs and bridge deck are not damaged, thereby guaranteeing the stability and safety of the entire bridge structure.

[0040] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0041] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bridge approach cable replacement device, characterized in that, include: Clamps (10) used to secure the arch ribs (70) of the approach bridge; The upper arch beam (20) is located above the clamp (10) and is connected to the arch rib (70) through the clamp (10); The bridge underpass beam (30) is located below the bridge deck (80) of the approach bridge and is connected to the tie beam of the approach bridge. A steel strand (40) is located between the upper arch beam (20) and the lower bridge beam (30). The steel strand (40) passes through the bridge deck (80) and connects the upper arch beam (20) located above the bridge deck (80) and the lower bridge beam (30) located below the bridge deck (80). Multiple anchors (50) are provided at both the upper arch beam (20) and the lower bridge beam (30). The two ends of the steel strand (40) are respectively connected to the anchors (50) on the upper arch beam (20) and the anchors (50) on the lower bridge beam (30).

2. The approach bridge cable replacement device according to claim 1, characterized in that, The approach bridge cable replacement device also includes a flexible component for anti-slip purposes, which is located between the clamp (10) and the arch rib (70).

3. The approach bridge cable replacement device according to claim 1, characterized in that, The approach bridge cable replacement device also includes a leveling structure (60), which is located between the clamp (10) and the upper arch beam (20) and is used to level the lower surface of the upper arch beam (20).

4. The approach bridge cable replacement device according to claim 1, characterized in that, The upper crossbeam (20) extends a predetermined length above the arch rib (70), and a portion of the upper crossbeam (20) extends from both sides of the arch rib (70). There are multiple steel strands (40), and the steel strands (40) are provided at the upper crossbeams (20) on both sides of the arch rib (70).

5. The approach bridge cable replacement device according to claim 1, characterized in that, The width of the bridge underbeam (30) is greater than the width of the tie beam, and the center line of the bridge underbeam (30) along the length direction is aligned vertically with the center line of the tie beam along the length direction. The steel strands (40) are threaded through the two sides of the bridge underbeam (30) that protrude from the tie beam.

6. The approach bridge cable replacement device according to claim 1, characterized in that, Along the extension direction of the arch rib (70), there are multiple steel strands (40), and the steel strands (40) are provided on both sides of the suspension cable of the approach bridge to be replaced.

7. The approach bridge cable replacement device according to claim 6, characterized in that, The distance between the steel strands (40) on both sides of the sling to be replaced is 3-5m.

8. The approach bridge cable replacement device according to any one of claims 1 to 7, characterized in that, The anchor (50) includes: The first anchor (51) is connected to the arch beam (20), and the first anchor (51) includes a tensioning member (511) located above the arch rib (70) for tensioning the steel strand (40). The second anchor (52) is located below the bridge crossbeam (30) and is used to fix the end of the steel strand (40).

9. The approach bridge cable replacement device according to any one of claims 1 to 7, characterized in that, The under-bridge crossbeam (30) is a steel support beam.

10. The approach bridge cable replacement device according to any one of claims 1 to 7, characterized in that, The clamps (10) are arranged in pairs and are connected by screws.

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