Inhaul cable anchoring structure for transforming beam bridge into cable-stayed bridge

Abstract

The utility model relates to an inhaul cable anchoring structure for transforming a beam bridge into a cable-stayed bridge, and relates to the technical field of bridge construction, the inhaul cable anchoring structure comprises a bridge body, an anchoring body and a prestressed steel cable, the bridge body comprises a bridge floor and a box girder, and the box girder is located below the bridge floor and fixedly connected with the bridge floor; the anchoring body is arranged on the box girder in a sleeving manner; the prestressed steel beam comprises a first steel beam and a second steel beam, the first steel beam sequentially penetrates through the anchoring body and the box girder and is fixedly connected with the anchoring body and the box girder, and the second steel beam is located below the box girder, sequentially penetrates through the anchoring body and is fixedly connected with the anchoring body; the anchoring body is provided with an anchoring notch, and the anchoring notch is used for containing the stay cable and a corresponding accessory structure. The stay cable anchoring structure which is safe, stable and high in standardization degree is provided for transformation of a beam bridge cable-stayed system, and technicians can conduct construction operation conveniently.

Description

Technical Field

[0001] The present application relates to the technical field of bridge construction, and in particular to a cable anchoring structure for transforming a beam bridge into a cable-stayed bridge. Background Art

[0002] With the continuous development of my country's transportation industry, existing highway bridges can no longer meet the growing traffic demand. Upgrading and renovating existing roads to improve highway service levels has gradually become the main way of highway construction in my country. The common problem of using existing corridors for road widening and reconstruction is that the existing overpass bridges under the road did not fully consider the future widening and reconstruction of the underpass in the early stage of construction, and the reserved width was insufficient. Therefore, it is a more economical and environmentally friendly treatment method to transform the bridge cable-stayed system and remove the piers that encroach on the road boundary.

[0003] The cable anchor structure is one of the key components for transforming a beam bridge into a cable-stayed bridge. It quickly and simply spreads the strong cable concentrated force at the anchor point to the main beam, playing the role of supporting the main beam.

[0004] In the related technology, the traditional cable anchoring structure generally installs a steel cable anchoring bracket at the bottom of the beam by bolting, or sets a steel anchoring box on the outside of the web of the main beam by bolting, so as to provide corresponding support to the bridge from the bottom of the bridge, thus providing the prerequisite for the transformation of the bridge from a beam bridge to a cable-stayed bridge.

[0005] Regarding the above-mentioned related technologies, the structure used in the traditional solution is relatively complex and difficult to achieve standardized construction. In addition, the anti-corrosion performance of the steel structure is poor, and the use function decreases over time, requiring later related repairs, which is not convenient for operators to carry out rapid construction. Utility Model Content

[0006] In order to provide a safe, stable and highly standardized cable anchoring structure to facilitate construction work by technical personnel, the present application provides a cable anchoring structure for converting a beam bridge into a cable-stayed bridge.

[0007] The present application provides a cable anchoring structure for transforming a beam bridge into a cable-stayed bridge, which adopts the following technical solution:

[0008] A cable anchoring structure for transforming a beam bridge into a cable-stayed bridge, comprising a bridge body, an anchor body and a prestressed steel bundle, wherein the bridge body comprises a bridge deck and a box girder, wherein the box girder is located below the bridge deck and is fixedly connected to the bridge deck;

[0009] The anchor body is sleeved on the box beam;

[0010] The prestressed steel strand comprises a first steel strand and a second steel strand, the first steel strand is sequentially passed through the anchor body and the box beam, and is fixedly connected to the anchor body and the box beam, and the second steel strand is located below the box beam, and the second steel strand is sequentially passed through the anchor body, and is fixedly connected to the anchor body;

[0011] The anchor body is provided with an anchoring notch, and the anchoring notch is used to accommodate the inclined cable and the corresponding auxiliary structure.

[0012] By adopting the above technical solution, the layout of the bridge deck provides protection for the top surface of the box girder, and the anchor body can quickly and simply spread the strong concentrated force applied by the inclined cable to the main beam, playing the role of supporting the main beam. The first steel bundle can further strengthen the connection between the bridge body and the anchor body, and the second steel bundle can strengthen the strength of the anchor body, thereby providing stable support for the bridge body and ensuring the normal traffic capacity of the bridge body.

[0013] Optionally, two first steel bundles are provided and are arranged sequentially along the length direction of the box girder.

[0014] By adopting the above technical solution, two first steel bundles are provided, thereby ensuring the connection stability between the box girder and the anchor body, thereby improving the stability of the bridge body during the construction process.

[0015] Optionally, five second steel bundles are provided, and the second steel bundles are arranged in sequence along the length direction of the anchor body, wherein the distance between two second steel bundles located at the same end of the anchor body is relatively close.

[0016] By adopting the above technical solution, the second steel bundle can improve the strength and rigidity of the anchor body, so that the integrity of the anchor body can be ensured when the anchor body supports the bridge body, thereby ensuring stable support for the bridge body. The two second steel bundles at the same end are close to each other, so that stable support can be provided to the end of the anchor body to prevent deformation of the anchor body.

[0017] Optionally, the box girder is provided with a web reserved hole, the anchor body is provided with two first reserved holes, the web reserved hole and the inner cavity of the first reserved hole are connected, and the first steel bundle is sequentially passed through the first reserved hole and the web reserved hole;

[0018] The anchor body is provided with a second reserved channel, and the second reserved channel is used to accommodate the second steel bundle.

[0019] By adopting the above technical solution, the web reserved channel and the first reserved channel provide space for the installation of the first steel bundle, and the second reserved channel provides space for the installation of the second steel bundle, thereby facilitating the operator to insert the first steel bundle and the second steel bundle into the appropriate positions, thereby strengthening the strength of the anchor body and providing stable support for the bridge body.

[0020] Optionally, both ends of the first steel bundle and the second steel bundle are provided with anchor plates, the first steel bundle and / or the second steel bundle are both passed through the anchor plates, and the anchor plates are fixedly connected to the anchor body.

[0021] By adopting the above technical solution, the anchor plate is mainly used to transfer the prestress of the steel bundle and prevent the concrete at the anchoring part from cracking and breaking, thereby ensuring the stability and safety of the prestressed concrete structure.

[0022] Optionally, the anchor plate is provided with a through hole, and the through hole is used to accommodate the first steel bundle and / or the second steel bundle.

[0023] By adopting the above technical solution, the setting of the through hole can provide an accommodation space for the first steel bundle and the second steel bundle, thereby providing stable support for the first steel bundle and the second steel bundle, ensuring a stable connection between the first steel bundle and the second steel bundle and the anchor body, and providing a stable support effect for the bridge body.

[0024] Optionally, it also includes a steel cage, which is formed by a plurality of vertical steel segments and horizontal steel segments, the vertical steel segments and the horizontal steel segments are fixedly connected, the vertical steel segments are passed through the box beam, and the vertical steel segments and the box beam are fixedly connected; the horizontal steel segments are passed through the box beam and are fixedly connected to the box beam.

[0025] By adopting the above technical scheme, the setting of the steel cage can improve the internal strength of the anchor body. At the same time, the vertical section steel bars can support and connect the anchor body and the bridge body from the vertical direction, and the horizontal section steel bars can support and connect the anchor body and the bridge body from the horizontal direction, thereby ensuring the supporting effect of the anchor body on the bridge body.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. By setting up anchor bodies, it is possible to provide space and force transmission paths for the anchoring of the inclined cables, provide stable support for the bridge body, and thus provide prerequisites for the removal of piers during road widening and reconstruction;

[0028] 2. By setting prestressed steel strands, the connection stability between the bridge body and the anchor body can be further enhanced;

[0029] 3. By setting up a steel cage, the strength and rigidity of the anchor body can be improved, and the connection between the bridge body and the anchor body can be further strengthened. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application;

[0031] Figure 2 is a schematic diagram of the cross-sectional structure of an embodiment of the present application from a first viewing angle;

[0032] Figure 3 is a schematic diagram of a cross-sectional structure from a second viewing angle of an embodiment of the present application;

[0033] Figure 4 It is a schematic diagram of the cross-sectional structure from the third viewing angle of the embodiment of the present application.

[0034] Figure numerals: 1. bridge body; 11. bridge deck; 12. box girder; 13. reserved channel in the web; 2. steel cage; 21. vertical section steel bar; 22. horizontal section steel bar; 3. anchor body; 31. anchoring groove; 32. first reserved channel; 33. second reserved channel; 4. prestressed steel bundle; 41. first steel bundle; 42. second steel bundle; 43. anchor plate; 44. through hole. DETAILED DESCRIPTION

[0035] The embodiment of the present application discloses a cable anchoring structure for converting a beam bridge into a cable-stayed bridge.

[0036] Reference Figure 1 , Figure 2 and Figure 3 A cable anchoring structure for transforming a beam bridge into a cable-stayed bridge includes a bridge body 1, a steel cage 2, an anchor body 3 and a prestressed steel bundle 4.

[0037] Reference Figure 1 The bridge body 1 includes a bridge deck 11 and a box girder 12. The bridge deck 11 is horizontally arranged. In this embodiment, a rectangular plate structure with a thickness of 8 to 10 cm is preferred. The box girder 12 is preferably an integrated box-type structure. The box girder 12 is horizontally arranged, and the length direction of the box girder 12 is parallel to the length direction of the bridge deck 11. The box girder 12 is located below the bridge deck 11, and the axis of the box girder 12 and the axis of the bridge deck 11 are located in the same vertical plane. The box girder 12 is integrally connected to the bridge deck 11 by pouring concrete.

[0038] Reference Figure 1 The top wall of the bridge deck 11 can be paved with an asphalt concrete layer.

[0039] Reference Figure 1 The bridge body 1 also includes a guardrail. In this embodiment, the number of guardrails is preferably two, and the two guardrails are respectively located on both sides of the length direction of the bridge deck 11. The guardrails are vertically arranged, and the guardrails are fixedly connected to the bridge body 1 through reserved steel bars.

[0040] Reference Figure 1 , Figure 2 and Figure 4, the length direction of the steel cage 2 is parallel to the length direction of the bridge deck 11. The steel cage 2 is located below the bridge deck 11. The steel cage 2 is a cage-type steel frame composed of a plurality of vertical steel segments 21 and a plurality of horizontal steel segments 22 spliced ​​in sequence, wherein the ends of the vertical steel segments 21 located above extend to the bottom wall of the flange of the box girder 12 and are fixedly connected to the bridge deck 11, and the vertical steel segments 21 located below extend to the bottom wall of the bottom plate of the box girder 12 and are fixedly connected to the box girder 12. The ends of the horizontal steel segments 22 located above extend to the side walls of the flange of the box girder 12 and are fixedly connected to the flange, and the horizontal steel segments 22 located below extend to the side walls of the web of the box girder 12 and are fixedly connected to the box girder 12.

[0041] Reference Figure 1 , Figure 2 and Figure 3 The anchor body 3 is made of concrete, and the anchor body 3 is preferably a rectangular block. The anchor body 3 is horizontally arranged, and the length direction of the anchor body 3 is perpendicular to the length direction of the bridge deck 11. The anchor body 3 is located below the bridge deck 11, and the anchor body 3 is sleeved on the steel cage 2 and the box girder 12.

[0042] Reference Figure 1 , Figure 2 and Figure 3 The anchor body 3 is provided with anchoring slots 31 at both ends in the length direction. The inner cavity of the anchoring slots 31 is connected with the anchor body 3 through the anchors provided at the ends of the inclined cables, thereby providing support for the entire bridge body 1.

[0043] Reference Figure 1 , Figure 2 and Figure 3 The prestressed steel bundle 4 includes a first steel bundle 41. In this embodiment, the number of the first steel bundles 41 is preferably two. The side wall of the box girder 12 is penetrated by two web reserved channels 13 in the horizontal direction. The two web reserved channels 13 are respectively located at the two ends of the length direction of the box girder 12. The anchor body 3 is provided with a first reserved channel 32 in the horizontal direction at the end of each through groove. The web reserved channel 13, the cavity and the inner cavity of the first reserved channel 32 are connected. The first steel bundle 41 is penetrated by the web reserved channel 13, the cavity and the first reserved channel 32. The first steel bundle 41 is fixedly connected to the anchor body 3 and the box girder 12.

[0044] Reference Figure 1 , Figure 2 and Figure 3The prestressed steel bundle 4 also includes a second steel bundle 42, and the number of the second steel bundles 42 is preferably five. The bottom of the anchor body 3 is penetrated by a second reserved channel 33 in the horizontal direction. In this embodiment, the number of the second reserved channels 33 is preferably five, and the five second reserved channels 33 are arranged in sequence along the length direction of the anchor body 3, wherein the distance between the two second reserved channels 33 located at both ends of the anchor body 3 is smaller than the distance between the other two second reserved channels 33, wherein each second reserved channel 33 is used to accommodate a second steel bundle 42, and the second steel bundle 42 is fixedly connected to the anchor body 3.

[0045] Reference Figure 2 , Figure 3 and Figure 4 The prestressed steel bundle 4 also includes an anchor plate 43. Anchor plates 43 are provided at both ends of the first steel bundle 41 and the second steel bundle 42. In this embodiment, the anchor plate 43 is preferably a rectangular plate. The anchor body 3 is provided with a plurality of positioning grooves for accommodating the anchor plates 43. The anchor plates 43 are vertically arranged. The anchor plates 43 are penetrated by through holes 44 in the horizontal direction. The through holes 44 are used to accommodate the first steel bundle 41 and the second steel bundle 42. The first steel bundle 41 and the second steel bundle 42 are fixedly connected by positioning bolts and the anchor plates 43.

[0046] The implementation principle of the cable anchoring structure for converting a beam bridge into a cable-stayed bridge in the embodiment of the present application is as follows: when carrying out road expansion work under the bridge, the anchoring body 3 is first cast around the crossbeam part of the bridge body 1.

[0047] Subsequently, the anchor body 3 and the box beam 12 are connected by the first steel beam 41. The second steel beam 42 is located below the box beam 12 and in the inner cavity of the anchor body 3, which can improve the bearing capacity and stiffness of the anchor body 3 and provide sufficient support capacity for the entire structure.

[0048] The interior of the anchor body 3 is provided with vertical section steel bars 21 and horizontal section steel bars 22. The vertical section steel bars 21 can connect the anchor body 3, and the horizontal section steel bars 22 can connect the anchor body 3 and the box beam 12, thereby ensuring the connection stability between the anchor body 3 and the bridge body 1.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cable anchoring structure for transforming a beam bridge into a cable-stayed bridge, characterized in that: The invention comprises a bridge body (1), an anchor body (3) and a prestressed steel bundle (4); the bridge body (1) comprises a bridge deck (11) and a box girder (12); the box girder (12) is located below the bridge deck (11) and is fixedly connected to the bridge deck (11); The anchor body (3) is sleeved on the box beam (12); The prestressed steel bundle (4) comprises a first steel bundle (41) and a second steel bundle (42), wherein the first steel bundle (41) is sequentially passed through the anchor body (3) and the box beam (12), and is fixedly connected to the anchor body (3) and the box beam (12), and the second steel bundle (42) is located below the box beam (12), and the second steel bundle (42) is sequentially passed through the anchor body (3), and is fixedly connected to the anchor body (3); The anchor body (3) is provided with an anchoring notch (31), and the anchoring notch (31) is used to accommodate the inclined cable and the corresponding auxiliary structure.

2. The cable anchoring structure for transforming a beam bridge into a cable-stayed bridge according to claim 1, characterized in that: Two first steel bundles (41) are provided and are arranged in sequence along the length direction of the box beam (12).

3. The cable anchoring structure for transforming a beam bridge into a cable-stayed bridge according to claim 1, characterized in that: There are five second steel bundles (42), and the second steel bundles (42) are arranged in sequence along the length direction of the anchor body (3), wherein the distance between two second steel bundles (42) located at the same end of the anchor body (3) is relatively close.

4. The cable anchoring structure for transforming a beam bridge into a cable-stayed bridge according to claim 1, characterized in that: The box beam (12) is provided with a web reserved hole (13), the anchor body (3) is provided with two first reserved holes (32), the inner cavities of the web reserved hole (13) and the first reserved holes (32) are connected, and the first steel bundle (41) is sequentially passed through the first reserved holes (32) and the web reserved holes (13); The anchor body (3) is provided with a second reserved channel (33), and the second reserved channel (33) is used to accommodate the second steel bundle (42).

5. The cable anchoring structure for transforming a beam bridge into a cable-stayed bridge according to claim 1, characterized in that: Anchor plates (43) are provided at both ends of the first steel bundle (41) and the second steel bundle (42); the first steel bundle (41) and / or the second steel bundle (42) are both passed through the anchor plates (43); and the anchor plates (43) and the anchor body (3) are fixedly connected.

6. The cable anchoring structure for transforming a beam bridge into a cable-stayed bridge according to claim 5, characterized in that: The anchor plate (43) is provided with a through hole (44), and the through hole (44) is used to accommodate the first steel bundle (41) and / or the second steel bundle (42).

7. The cable anchoring structure for transforming a beam bridge into a cable-stayed bridge according to claim 1, characterized in that: The invention also comprises a steel cage (2), wherein the steel cage (2) comprises a plurality of vertical steel bars (21) and horizontal steel bars (22) which are arranged together, wherein the vertical steel bars (21) and the horizontal steel bars (22) are fixedly connected, wherein the vertical steel bars (21) are passed through the box girder (12), and the vertical steel bars (21) and the box girder (12) are fixedly connected; and the horizontal steel bars (22) are passed through the box girder (12) and are fixedly connected to the box girder (12).

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