Anti-shearing-cracking reinforcing device for active-service simply supported girder bridge

Abstract

The invention relates to the technical field of bridges, and particularly discloses an anti-shear cracking reinforcing device for an active service simply supported girder bridge, which comprises a groove type reinforcing member, a porous threaded outer pipe, a porous threaded inner pipe, a fastening nut, a glass anchoring pipe and a sealing cover. Wherein the groove type reinforcing piece is clamped on the side wall of the end portion of the simply supported girder bridge, the porous threaded outer pipe is fixed in the side wall of the simply supported girder bridge, and through holes corresponding to the porous threaded outer pipe are formed in the side wall of the groove type reinforcing piece. And the porous threaded inner pipe is in threaded connection in the porous threaded outer pipe. The fastening nut is connected to the outer end of the porous threaded inner pipe in a threaded mode and fastens the groove type reinforcing piece to the side wall of the simply supported girder bridge. The porous threaded inner pipes are distributed at intervals, and the other porous threaded outer pipes are filled with the glass anchoring pipes. According to the anti-shear cracking reinforcing device, the anti-shear bearing capacity of the simply supported girder bridge can be effectively improved, and cracks can be repaired to prevent further development and expansion.

Description

Technical Field

[0001] The invention relates to the technical field of bridges, and in particular to an anti-shear cracking reinforcement device for existing simply supported beam bridges. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention, and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] A bridge whose superstructure consists of a main load-bearing beam simply supported on piers at both ends is a simply supported beam bridge. It is a bridge structure with simple structure, high load transfer efficiency, short construction period, strong adaptability and good economy. It is very suitable for standardized and assembled manufacturing in factories. It is currently widely used in the construction of urban roads, highways, railways and other transportation routes. In addition, simply supported beam bridges are also very suitable for areas with large terrain fluctuations and need to cross obstacles such as rivers and valleys.

[0004] However, it is precisely this structure that leads to the poor integrity of the entire bridge deck of the simply supported beam bridge, and the intermediate bending moment increases sharply with the increase of span. Therefore, during use, the beam bridge will bend downward relatively obviously after being loaded. In addition, with the increasing service life of the bridge and the influence of human factors such as vehicle overload, the beam bridge will gradually suffer from fatigue damage during the continuous up and down bending process. These damages are mostly in the form of cracks at both ends of the beam bridge in the early stage. After further development, these cracks form larger cracks, resulting in the risk of bridge fracture. Therefore, the existing simply supported beam bridges generally have bridge disease problems caused by insufficient shear bearing capacity, which poses a potential risk to driving safety. Therefore, strengthening the bridge to improve its shear bearing capacity is crucial to improving the safe service of the bridge. Summary of the invention

[0005] In view of the above problems, the present invention provides a shear cracking reinforcement device for existing simply supported beam bridges, which can not only effectively improve the shear bearing capacity of the simply supported beam bridge, but also repair the cracks to prevent further development and expansion, thereby effectively improving the safety of the simply supported beam bridge. Specifically, the technical solution of the present invention is as follows.

[0006] A shear cracking-resistant reinforcement device for existing simply supported beam bridges comprises: a groove-type reinforcement piece, a porous threaded outer tube, a porous threaded inner tube, a fastening nut and a glass anchor tube. The groove-type reinforcement piece is a groove-shaped structure formed by bending a rigid plate body, which is engaged with the side wall of the end of the simply supported beam bridge, and the bottom plate of the groove-type reinforcement piece is attached to the bottom surface of the simply supported beam bridge. The porous threaded outer tube is horizontally fixed in the side wall of the simply supported beam bridge where the groove-type reinforcement piece is located, and the side plate of the groove-type reinforcement piece has a through hole corresponding to the porous threaded outer tube. The porous threaded inner tube enters the porous threaded outer tube through the through hole and the two are threadedly connected, and the openings on the side wall of the porous threaded outer tube and the openings on the side wall of the porous threaded inner tube are at least partially in an overlapping state. The fastening nut is threadedly connected to the outer end of the porous threaded inner tube and fastens the groove-type reinforcement piece to the side wall of the simply supported beam bridge. The porous threaded inner tubes are distributed at intervals, and each of the remaining porous threaded outer tubes that are not provided with the porous threaded inner tubes is filled with the glass anchoring tube, and the outer ports of these porous threaded outer tubes are closed by the sealants through the through holes, so that the glass anchoring tube is sealed in the porous threaded inner tube. The glass anchoring tube is a glass tube loaded with a chemical anchoring agent.

[0007] Furthermore, one end of the bottom plate of the trough type reinforcement has an extension plate extending outward. When in use, the extension plate is located on the side away from the end of the simply supported beam bridge, so as to utilize the elastic deformation capacity of the extension plate to reduce the shearing of the bottom plate end of the trough type reinforcement on the bottom surface of the simply supported beam bridge.

[0008] Furthermore, the upper surface of the end of the extension plate is chamfered or arc-shaped so as to reduce the shearing effect of the edge of the extension plate on the bottom surface of the simply supported beam bridge.

[0009] Furthermore, the inner wall of the slot-type reinforcement between the adjacent through holes has a vertically arranged groove filled with a flexible sealing strip, and the flexible sealing strip protrudes from the inner wall surface of the slot-type reinforcement, so that after the slot-type reinforcement is fixed on the simply supported beam bridge, the flexible sealing strip is pressed against the side wall of the simply supported beam bridge. Optionally, the material of the flexible sealing strip includes any one of rubber, plastic, etc.

[0010] Furthermore, the protruding length of the flexible sealing strip is 0.5-1.0 mm, so that the flexible sealing strip can be used to separate the adjacent porous threaded inner tubes to form an independent grouting reinforcement area.

[0011] Furthermore, the opening of the groove is in a trumpet-shaped structure that opens outwards.

[0012] Furthermore, the seal has an external thread on its outer wall at one end, which is located in the outer port of the porous threaded inner tube and the two are threadedly connected, so that the glass anchoring tube is sealed by the thread on the inner wall of the porous threaded inner tube.

[0013] Furthermore, the openings on the porous threaded inner tube are longitudinal strip holes distributed in a staggered manner. The openings on the porous threaded outer tube are transverse strip holes distributed in a staggered manner, and after the porous threaded outer tube and the porous threaded inner tube are threaded together, the transverse strip holes and the longitudinal strip holes are in an intersecting state.

[0014] Furthermore, the outer side wall of the porous threaded outer tube is provided with threads, which helps to improve the anchoring force between the porous threaded outer tube and the simply supported beam bridge.

[0015] Furthermore, the gap between the inner wall of the porous threaded inner tube and the outer wall of the glass anchoring tube is no greater than 1 mm, such as 0.2-1.0 mm.

[0016] Compared with the prior art, the present invention has at least the following beneficial technical effects: (1) The anti-shear cracking reinforcement device for the existing simply supported beam bridges of the present invention uses a rigid strip-shaped groove structure as a reinforcement component, and fixes it on the end side wall of the simply supported beam bridge by using the porous threaded outer tube, the porous threaded inner tube, etc., so as to improve the bending resistance of the simply supported beam bridge by using the rigid groove-type reinforcement part, reduce the problem of fatigue damage and cracks gradually occurring in the process of continuous up and down bending due to the load applied by vehicles passing by during the service process of the simply supported beam bridge, and improve the shear bearing capacity.

[0017] (2) The present invention adopts a porous threaded outer tube, a porous threaded inner tube and a glass anchor tube, which not only achieves the purpose of fixing the groove-type reinforcement member and the simply supported beam bridge together, but also the glass anchor tube filled in the porous threaded inner tube in an interval arrangement can self-repair the cracks that appear, which helps to prevent the cracks from further developing and expanding. At the same time, the reserved porous threaded outer tube and porous threaded inner tube can be used for grouting to further repair the cracks in the simply supported beam bridge, thereby improving the service life of the beam bridge.

[0018] (3) The trough-type reinforcement of the present invention is provided with an extension plate at one end of its bottom plate, which utilizes the characteristic that the extension plate has better elastic deformation ability than the bottom plate of the trough-type reinforcement to solve the problem that the shear force caused by the hard squeezing of the end of the bottom plate during the continuous up and down bending process of the simply supported beam bridge is easy to cause damage to the bottom surface of the simply supported beam bridge, thereby causing the generation of cracks. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] Figure 1 Schematic diagram of the structure of the reinforcement device in the following embodiments.

[0021] Figure 2 Schematic diagram of the structure of the groove reinforcement member in the following embodiments.

[0022] Figure 3 1 is a cross-sectional view of a porous threaded outer tube in a reinforcement device in the following embodiments.

[0023] Figure 4 1 is a cross-sectional view of the glass anchoring tube in the reinforcement device in the following embodiments.

[0024] Figure 5 Schematic diagram of the structure of the porous threaded outer tube and the porous threaded inner tube in the following embodiments.

[0025] Figure 6 Schematic diagram of the structure of the sealing member and the porous threaded inner tube in the following embodiments.

[0026] Figure 7 for Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0027] Figure 8 Schematic diagram of the structure of another porous threaded outer tube and a porous threaded inner tube in the following embodiments.

[0028] The marks in the above figure represent: 1-groove reinforcement, 2-porous threaded outer tube, 3-porous threaded inner tube, 4-fastening nut, 5-glass anchor tube, 6-simply supported beam bridge, 101-through hole, 102-seal, 103-extension plate, 104-groove, 105-flexible sealing strip. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0031] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or components referred to need to have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. The technical solution of the present invention is further described in conjunction with the drawings and specific embodiments of the specification.

[0032] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , an example of a shear cracking resistance reinforcement device for an existing simply supported beam bridge is provided, comprising: a groove-type reinforcement 1, a porous threaded outer tube 2, a porous threaded inner tube 3, a fastening nut 4 and a glass anchor tube 5. Specifically: the groove-type reinforcement 1 is a groove-shaped structure formed by bending a steel plate. When in use, the groove-type reinforcement 1 is engaged with the side wall at the end of the simply supported beam bridge 6, and the bottom plate and the side plate of the groove-type reinforcement 1 are respectively attached to the bottom surface and the side wall of the simply supported beam bridge 6. Due to the constraint of the bottom plate of the groove-type reinforcement 1, it helps to improve the ability of the simply supported beam bridge 6 to resist downward bending, thereby improving the ability of the simply supported beam bridge 6 to resist continuous up and down bending under the load imposed by passing vehicles, etc., which is conducive to preventing the problem of fatigue damage causing cracks, and even expanding into larger cracks, thereby improving the shear bearing capacity of the simply supported beam bridge 6.

[0033] Furthermore, this embodiment uses the rigid multi-porous threaded outer tube 2 and multi-porous threaded inner tube 3 to fix the groove reinforcement 1 and the side wall of the simply supported beam bridge 6 as a whole. Figure 5 The porous threaded outer tube 2 is a porous steel tube with openings at both ends and internal threads on the inner wall. Figure 3 The porous threaded outer tube 2 is horizontally fixed in the side wall of the simply supported beam bridge 6 by an anchoring agent coated on its outer wall, and the outer port of the porous threaded outer tube 2 is flush with the side wall surface of the simply supported beam bridge 6. A plurality of the porous threaded outer tubes 2 are distributed along the length direction of the side wall of the simply supported beam bridge 6, and the side plate of the groove type reinforcement member 1 has through holes 101 corresponding to the porous threaded outer tubes 2 one by one.

[0034] refer to Figure 5 The porous threaded inner tube 3 is a porous steel tube with openings at both ends and threads on the outer wall. Figure 3 One end of the porous threaded inner tube 3 passes through the through hole 101 and is tightened in the porous threaded outer tube 2, and the openings on the side wall of the porous threaded outer tube 2 and the openings on the side wall of the porous threaded inner tube 3 are at least partially overlapped. The fastening nut 4 is threadedly connected to the outer end of the porous threaded inner tube 3, thereby fastening the groove-type reinforcement 1 to the simply supported beam bridge 6.

[0035] refer to Figure 1 and Figure 4 , the porous threaded inner tubes 3 are distributed at intervals, and the remaining porous threaded outer tubes 2 that are not provided with the porous threaded inner tubes 3 are each filled with the glass anchoring tube 5, so that the porous threaded inner tubes 3 and the glass anchoring tubes 5 are in a staggered distribution state. The gap between the inner wall of the porous threaded outer tube 2 and the outer wall of the glass anchoring tube 5 is not greater than 1 mm, such as 0.2 mm, 0.5 mm, 0.8 mm, 1.0 mm, etc. The glass anchoring tube 5 is a glass tube loaded with a chemical anchoring agent. The outer port of the porous threaded outer tube 2 filled with the glass anchoring tube 5 is in a closed state, so that the glass anchoring tube 5 is sealed in the porous threaded outer tube 2. Specifically, refer to Figure 6 The cylindrical seal 102 has an external thread on its outer wall at one end, which is located in the outer port of the porous threaded outer tube 2 and the two are threadedly connected, so that the glass anchoring tube 5 is sealed by the thread on the inner wall of the porous threaded outer tube 2. At the same time, after the seal 102 is completely tightened into the porous threaded outer tube 2, it can also play a role in tightening the groove-type reinforcement 1.

[0036] This embodiment not only uses the porous threaded outer tube 2 and the porous threaded inner tube 3 to fix the groove type reinforcement 1 and the simply supported beam bridge 6 together, but also arranges the glass anchoring tube 5 in the porous threaded outer tube 2 and the porous threaded inner tube 3 at intervals. As the service time increases, the porous threaded outer tube 2 gradually deforms due to the deformation of the simply supported beam bridge 6, and the glass anchoring tube 5 therein is squeezed and released to release the chemical anchoring agent therein. These anchoring agents further penetrate into the simply supported beam bridge 6 through the openings on the porous threaded outer tube 2 and the porous threaded inner tube 3, thereby repairing the defects such as cracks therein, and preventing these cracks from developing into larger cracks that cause the bearing capacity of the simply supported beam bridge 6 to decrease. Thus, the self-repair of the cracks generated in the simply supported beam bridge 6 is achieved by the cooperation between the simply supported beam bridge 6, the porous threaded outer tube 2 and the glass anchoring tube 5, thereby improving the service life of the beam bridge. In addition, the threads on the inner wall of the porous threaded outer tube 2, which are originally used to connect the porous threaded inner tube 3, also help to convert the extrusion force caused by its deformation into shear force and apply it to the side wall of the glass anchor tube 5, which is conducive to the rupture of the glass anchor tube 5, improves the sensitivity of the self-repair mechanism, and facilitates the timely initiation of self-repair of cracks. In addition, the reserved porous threaded outer tube 2 can also be used in the later maintenance process. Once the glass anchor tube 5 is found to have been broken, it means that the deformation and bending of the simply supported beam bridge 6 is large, which may cause more cracks or even cracks in it. At this time, the cracks can be repaired by grouting through the porous threaded outer tube 2, thereby improving the safe service life of the simply supported beam bridge 6 through multiple protection mechanisms.

[0037] In another embodiment, reference Figure 1 and Figure 2 The above-mentioned shear cracking resistance reinforcement device for existing simply supported beam bridges also includes an extension plate 103 arranged on the bottom plate of the trough reinforcement member 1. The extension plate 103 is located at one end of the bottom plate of the trough reinforcement member 1 and the two are connected in an integrated manner. After the trough reinforcement member 1 is fixed to the simply supported beam bridge 6, the extension plate 103 and the bottom plate of the trough reinforcement member 1 are attached to the bottom surface of the simply supported beam bridge 6 together, and the extension plate 103 is located on the side away from the end of the simply supported beam bridge 6, for example Figure 1 In the figure, the extension plate 103 is on the opposite side of the left end of the simply supported beam bridge 6. The damage to the bottom surface of the simply supported beam bridge 6 is reduced by utilizing the characteristic that the extension plate 103 has better elastic deformation ability than the bottom plate of the slot type reinforcement 1. This is because: the extension plate 103 is more likely to deform as the simply supported beam bridge 6 bends downward without the pulling effect of the side plate of the slot type reinforcement 1, which is equivalent to forming a transition zone between the bottom plate end of the slot type reinforcement 1 and the bottom surface of the simply supported beam bridge 6, preventing the shear force caused by the hard squeezing of the end of the bottom plate of the simply supported beam bridge 6 during the continuous up and down bending process from damaging the bottom surface of the simply supported beam bridge 6, thereby causing the generation of cracks. In a more preferred embodiment, refer to Figure 2 The upper surface of the end of the extension plate 103 is chamfered or arc-shaped to further reduce the shearing effect of the edge on the bottom surface of the simply supported beam bridge 6.

[0038] In another embodiment, reference Figure 2 The above-mentioned anti-shear cracking reinforcement device for the existing simply supported beam bridge also includes a groove 104 arranged on the inner wall of the groove type reinforcement 1, and there is a groove 104 distributed between every two adjacent through holes 101, which is filled with a flexible sealing strip 105, and the flexible sealing strip 105 protrudes from the inner wall surface of the groove type reinforcement 1, and the material of the flexible sealing strip 105 includes rubber, plastic, etc. The protruding length of the flexible sealing strip 105 can be arbitrarily selected between 0.5~1.0mm, such as 0.5mm, 0.8mm, 1.0mm, etc. After the groove type reinforcement 1 is fastened to the simply supported beam bridge 6, the flexible sealing strip 105 is squeezed on the side wall of the simply supported beam bridge 6 to separate the adjacent porous threaded inner tubes 3 to form an independent grouting reinforcement area, which helps to maintain a larger grouting pressure during grouting, ensures that the cracks in the grouting area can be better filled, and improves the repair effect of the cracks. In a better embodiment, refer to Figure 7 The opening of the groove 104 is in a trumpet-shaped structure that opens outward, so that the flexible sealing strip 105 can expand outward better after being squeezed, forming a larger sealing contact surface on the side wall of the simply supported beam bridge 6, thereby improving the sealing effect.

[0039] In another embodiment, the outer wall of the porous threaded outer tube 2 of the above-mentioned anti-shear cracking reinforcement device for the existing simply supported beam bridge also has threads, which helps to improve the anchoring force between the porous threaded outer tube 2 and the simply supported beam bridge 6.

[0040] In another embodiment, reference Figure 8 The through holes 101 on the porous threaded inner tube 3 of the above-mentioned anti-shear cracking reinforcement device for the existing simply supported beam bridge are longitudinal strip holes distributed in a staggered manner. The through holes 101 of the porous threaded outer tube 2 are transverse strip holes distributed in a staggered manner, and after the porous threaded outer tube 2 and the porous threaded inner tube 3 are threaded together, the transverse strip holes and the longitudinal strip holes are in an intersecting state, thereby ensuring that the anchoring agent in the glass anchoring tube 5 or the slurry during grouting can quickly penetrate into the simply supported beam bridge 6, while expanding the penetration area, thereby improving the construction efficiency and repair effect.

[0041] Finally, it should be noted that any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. Although the above describes the specific implementation of the present invention in conjunction with the drawings, it is not a limitation of the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the present invention.

Claims

1. A shear cracking reinforcement device for existing simply supported beam bridges, characterized in that: include: The groove type reinforcement is a groove-shaped structure formed by bending a rigid plate body, which is engaged with the side wall of the end of the simply supported beam bridge when in use, and the bottom plate of the groove type reinforcement is attached to the bottom surface of the simply supported beam bridge; A porous threaded outer tube is horizontally fixed in the side wall of the simply supported beam bridge where the groove type reinforcement is located, and the side plate of the groove type reinforcement is provided with through holes corresponding to the porous threaded outer tube; A porous threaded inner tube, which passes through the through hole and enters the porous threaded outer tube, and the two are threadedly connected, and the openings on the side wall of the porous threaded outer tube and the openings on the side wall of the porous threaded inner tube are at least partially overlapped; a fastening nut threadedly connected to the outer end of the porous threaded inner tube and fastening the channel reinforcement to the side wall of the simply supported beam bridge; The glass anchoring tube, the porous threaded inner tubes are distributed at intervals, and each of the remaining porous threaded outer tubes without the porous threaded inner tubes is filled with the glass anchoring tube, and the outer ports of these porous threaded outer tubes are closed by the seals of the through holes, and the glass anchoring tube is a glass tube loaded with a chemical anchoring agent.

2. The anti-shear cracking reinforcement device for existing simply supported beam bridges according to claim 1 is characterized in that: One end of the bottom plate of the trough type reinforcement is provided with an extension plate extending outward, and after the trough type reinforcement is installed on the simply supported beam bridge, the extension plate is located on a side away from the end of the simply supported beam bridge.

3. The anti-shear cracking reinforcement device for existing simply supported beam bridges according to claim 2 is characterized in that: The upper surface of the end of the extension plate is chamfered or arc-shaped.

4. The anti-shear cracking reinforcement device for existing simply supported beam bridges according to claim 1 is characterized in that: A vertically arranged groove is provided on the inner side wall of the groove type reinforcement member between the adjacent through holes, in which a flexible sealing strip is filled, and the flexible sealing strip protrudes from the inner side wall surface of the groove type reinforcement member.

5. The anti-shear cracking reinforcement device for existing simply supported beam bridges according to claim 4 is characterized in that: The opening of the groove is in a trumpet-shaped structure that opens outwards.

6. The anti-shear cracking reinforcement device for existing simply supported beam bridges according to claim 4 is characterized in that: The protruding length of the flexible sealing strip is 0.5-1.0 mm.

7. The anti-shear cracking reinforcement device for existing simply supported beam bridges according to claim 1 is characterized in that: An outer wall at one end of the sealing member is provided with an external thread, which is located in the outer port of the porous threaded inner tube and the two are threadedly connected.

8. The anti-shear cracking reinforcement device for an existing simply supported beam bridge according to any one of claims 1 to 7, characterized in that: The openings on the porous threaded inner tube are longitudinal strip holes distributed in a staggered manner, and the openings on the porous threaded outer tube are transverse strip holes distributed in a staggered manner. After the porous threaded outer tube and the porous threaded inner tube are threaded together, the transverse strip holes and the longitudinal strip holes are in an intersecting state.

9. The anti-shear cracking reinforcement device for an existing simply supported beam bridge according to any one of claims 1 to 7, characterized in that: The outer side wall of the porous threaded outer tube is provided with threads.

10. The anti-shear cracking reinforcement device for an existing simply supported beam bridge according to any one of claims 1 to 7, characterized in that: The gap between the inner wall of the porous threaded inner tube and the outer wall of the glass anchoring tube is no greater than 1 mm.

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