A reinforcing structure for bridge support anchoring bolt shearing disease

Abstract

The utility model discloses a kind of reinforcing structures for bridge support anchoring bolt shearing disease, including the enclosure steel plate being set to support four around, support upper portion is equipped with support upper steel plate and beam bottom wedge, enclosure steel plate is connected with support upper steel plate welding, and enclosure steel plate is set around beam bottom wedge, to form annular space between enclosure steel plate and beam bottom wedge, annular space is injected with polymer mortar, polymer mortar is solidified and is embedded with enclosure steel plate together with beam bottom wedge, form the anchoring restraint structure of alternative shearing anchoring bolt, the utility model can realize avoiding large-scale disturbance to other components of bridge, also avoid the influence to bridge existing traffic.

Description

Technical Field

[0001] This utility model relates to the field of bridge bearing anchor bolt technology, specifically a reinforcement structure for shear failure of bridge bearing anchor bolts. Background Technology

[0002] In bridge structures, bearings are important force transmission and restraint devices. When the beam undergoes large horizontal displacement, especially under seismic loads, the anchor bolts between the steel plate on the bearing and the beam often break, causing the bearing to lose its restraint function on the beam displacement and thus lose its seismic resistance.

[0003] Traditional treatment for the above-mentioned defects involves jacking up the bridge and replacing the bearings. While this traditional approach can completely resolve the defects, it is costly, difficult to construct, time-consuming, and involves complex procedures. Furthermore, it requires interrupting existing traffic on the bridge, which does not meet the requirements for rapid repair. Therefore, we propose a reinforcement structure for shearing defects in bridge bearing anchor bolts. Utility Model Content

[0004] The purpose of this invention is to provide a reinforcement structure for shear failure of bridge bearing anchor bolts, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a reinforcement structure for shearing defects of bridge bearing anchor bolts, comprising a retaining steel plate disposed around the bearing, an upper steel plate and a beam bottom wedge block disposed on the upper part of the bearing, the retaining steel plate being welded to the upper steel plate, and the retaining steel plate being disposed around the beam bottom wedge block to form an annular space between the retaining steel plate and the beam bottom wedge block, the annular space being filled with polymer mortar, and after the polymer mortar solidifies, it together with the retaining steel plate to embed the beam bottom wedge block, forming an anchoring constraint structure that replaces the shearing anchor bolt.

[0006] Furthermore, the thickness of the enclosure steel plate is 10mm to 30mm.

[0007] Furthermore, the enclosure steel plate is bent at an obtuse angle, the angle of which is 100 degrees to 140 degrees.

[0008] Furthermore, the enclosure steel plate includes a horizontal section and an inclined section, the horizontal section is welded to the steel plate on the support, and the width of the horizontal section is 40mm to 100mm.

[0009] Furthermore, the height of the inclined section is 80mm to 200mm.

[0010] Furthermore, the enclosure steel plate consists of multiple pieces, which are spliced ​​together along the circumference of the support, and adjacent pieces are welded and fixed together to form an integral enclosure structure surrounding the support.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: During construction, the reinforcement structure formed by embedding the wedge-shaped block at the bottom of the beam with the retaining steel plate and polymer mortar replaces the sheared anchor bolts as the new anchor constraint, effectively ensuring the constraint effect on the horizontal displacement of the beam, avoiding large-scale disturbance to other components of the bridge, and avoiding the impact on the existing traffic on the bridge. After the defects are discovered, rapid repair and reinforcement can be carried out, which is especially suitable for post-earthquake emergency repair. Attached Figure Description

[0012] Figure 1 This is an elevation view of the reinforced structure of this utility model;

[0013] Figure 2 This is a plan view of the reinforcement structure of this utility model.

[0014] In the diagram: 1. Beam; 2. Support; 3. Beam bottom wedge block; 4. Steel plate on the support; 5. Anchor bolt; 6. Enclosure steel plate; 7. Polymer mortar. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-2A reinforcement structure for shear failure of bridge bearing anchor bolts includes a retaining steel plate 6 surrounding the bearing 2. An upper steel plate 4 and a bottom wedge block 3 are located on the upper part of the bearing 2. The retaining steel plate 6 is welded to the upper steel plate 4, and surrounds the bottom wedge block 3 to form an annular space between the retaining steel plate 6 and the bottom wedge block 3. Polymer mortar 7 is injected into the annular space. After the polymer mortar 7 solidifies, it, together with the retaining steel plate 6, embeds the bottom wedge block 3, forming an anchoring constraint that replaces the shear failure anchor bolt 5. The structure includes a retaining steel plate 6 with a thickness of 10mm to 30mm. The retaining steel plate 6 is bent at an obtuse angle with an angle of 100 degrees to 140 degrees. The retaining steel plate 6 includes a horizontal section and an inclined section. The horizontal section is welded to the steel plate 4 on the support. The width of the horizontal section is 40mm to 100mm. The height of the inclined section is 80mm to 200mm. The retaining steel plate 6 consists of multiple pieces. The multiple retaining steel plates 6 are spliced ​​around the support 2, and adjacent retaining steel plates 6 are welded and fixed to each other to form an integral retaining structure around the support 2.

[0017] Specifically, first sweep away the debris and dust around the support 2, then check and clean the remaining parts of the cut anchor bolts 5. If there are protruding bolt fragments that affect subsequent installation, grind them flat with an angle grinder. If the fragments are embedded inside the steel plate 4 on the support and do not affect the operation, they can be ignored. Finally, wipe away the oil and rust on the surface of the steel plate 4 on the support and the outer surface of the wedge block 3 at the bottom of the beam with a cloth to ensure that these contact surfaces are clean so that subsequent welding and mortar bonding can be firm.

[0018] Based on the actual size of the support 2 to be reinforced, multiple retaining steel plates 6 are fabricated, and the parameters of each steel plate must meet the requirements:

[0019] Choose a thickness of 10mm to 30mm. Choose a thicker support if the force is large and a thinner support if the force is small. The specific thickness should be calculated according to the design.

[0020] The steel plate is bent into an obtuse angle of 100 to 140 degrees using a bending machine. After bending, the steel plate will be divided into two sections: one is a horizontal section and the other is an inclined section.

[0021] The dimensions of the multiple steel plates to be processed must be calculated so that they can be pieced together to wrap around the wedge-shaped block 3 at the bottom of the beam, forming a closed ring enclosure.

[0022] Move each processed retaining steel plate 6 to the side of the support 2 and arrange them in order: ensure that the steel plates are tightly attached to the upper surface of the steel plate 4 on the support, with the inclined section facing the outside of the bottom wedge block 3 of the beam. Align the edges of each steel plate to ensure that all steel plates, after being arranged around the bottom wedge block 3, form a uniform annular space with it. For positioning, small clips can be used to temporarily fix the steel plates to the steel plate 4 on the support to prevent displacement. Use arc welding to weld the horizontal section of each steel plate to the steel plate 4 on the support, ensuring a full weld and that the weld height is not less than the thickness of the steel plate. Weld slowly to avoid slag and porosity. After welding, tap the weld with a small hammer. A clear sound means it is welded well, while a dull sound means it needs to be re-welded, otherwise it will break under stress. Weld the joints between multiple steel plates fully to make all the steel plates form a whole ring enclosure structure. This step is very important. If the weld is not done well and there are gaps, the mortar will leak later. So after welding, carefully check each joint to ensure that there are no missed welds or cracks.

[0023] Blow away welding slag and dust from the annular space with compressed air. If there is rust on the inner surface of the steel plate, sand it clean. Then brush the outer surface of the beam bottom wedge block 3 with a brush to ensure that there are no debris or impurities that will affect the adhesion of the mortar and the parts. It must be cleaned thoroughly. Follow the product instructions for polymer mortar 7. Generally, the outer surface of the beam bottom wedge block 3 and the inner surface of the retaining steel plate 6 should be moistened with water, but water should not accumulate, otherwise the mortar will become thin. This is to prevent the dry concrete beam bottom wedge block 3 and steel plate from absorbing the moisture in the mortar, which would cause the mortar to crack and not adhere properly. Use the mixing ratio on the mortar packaging, such as 1 bag of premix + 0.5 liters of water (the specific ratio depends on the product). Mix with a mixer for 3-5 minutes until the mortar is uniform, without lumps, and can flow smoothly. The mixed mortar should be used within 1-2 hours. Do not mix too much at once.

[0024] Finally, pour the mixed polymer mortar 7 into the funnel, slowly pouring it from one side of the ring-shaped retaining structure. If there is no opening, a small notch can be cut at the top of a steel plate as a pouring port. When pouring, gently insert a small vibrator into the mortar, vibrating it every 100mm or so for 5-10 seconds until no more air bubbles appear on the surface of the mortar. This will expel the air and prevent voids in the mortar, which will cause it to break under stress. Pour the mortar until it is level with the top of the retaining steel plate 6. Do not pour too much and waste it. After pouring, smooth the surface of the mortar with a trowel. If there is leakage at the weld of the steel plate, wipe it clean with a damp cloth and add a little more mortar to plug it. Otherwise, a piece will be missing. According to the mortar instructions, wrap the mortar with plastic film to keep it moist within 12 hours after pouring and cure it for at least 7 days.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A reinforcement structure for shear failure of bridge bearing anchor bolts, characterized in that, The structure includes a retaining steel plate (6) surrounding the support (2). The support (2) has an upper steel plate (4) and a bottom wedge block (3) on its upper part. The retaining steel plate (6) is welded to the upper steel plate (4), and the retaining steel plate (6) surrounds the bottom wedge block (3) to form an annular space between the retaining steel plate (6) and the bottom wedge block (3). The annular space is filled with polymer mortar (7). After the polymer mortar (7) solidifies, it and the retaining steel plate (6) together embed the bottom wedge block (3) to form an anchoring constraint structure that replaces the shear anchor bolt (5).

2. The reinforcement structure for shear failure of bridge bearing anchor bolts according to claim 1, characterized in that: The thickness of the enclosure steel plate (6) is 10mm to 30mm.

3. A reinforcement structure for shear failure of bridge bearing anchor bolts according to claim 2, characterized in that: The enclosure steel plate (6) is bent at an obtuse angle, the angle of which is 100 degrees to 140 degrees.

4. A reinforcement structure for shear failure of bridge bearing anchor bolts according to claim 3, characterized in that: The enclosure steel plate (6) includes a horizontal section and an inclined section. The horizontal section is welded to the steel plate (4) on the support, and the width of the horizontal section is 40mm to 100mm.

5. A reinforcement structure for shear failure of bridge bearing anchor bolts according to claim 4, characterized in that: The height of the inclined section is 80mm to 200mm.

6. A reinforcement structure for shear failure of bridge bearing anchor bolts according to claim 5, characterized in that: The enclosure steel plate (6) consists of multiple pieces, which are spliced ​​together around the support (2) and adjacent two pieces are welded and fixed to form an integral enclosure structure surrounding the support (2).

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