Transverse rapid maintaining and reinforcing device for hollow slab beam and reinforcing method of transverse rapid maintaining and reinforcing device

Abstract

The invention relates to a hollow slab girder transverse rapid maintaining and reinforcing device which comprises resin glue, fiber cloth and a precast block, the fiber cloth has a preset area, the resin glue is coated on opposite side plates and bottom plates of two hollow slab girders and two ends of the fiber cloth in the length direction, and the two ends of the fiber cloth in the length direction are coated on the precast block. The fiber cloth is attached to opposite side plates and bottom plates of the two hollow plate beams respectively, a filling space is preset in the middle of the fiber cloth, the size of the prefabricated block is matched with the preset filling space of the fiber cloth, and the prefabricated block is placed in the filling space of the prefabricated cloth. Traffic enclosing and pavement layer excavation and milling are not needed, no damage is caused to the plate girder, construction is convenient and rapid, no pollution is caused to the environment, economical efficiency is high, and preventive maintenance is conducted on hinge joint damage, serious damage or slight damage.

Description

Technical Field

[0001] The present application relates to the technical field of road and bridge maintenance, and in particular to a device for rapid transverse repair and reinforcement of a hollow slab beam and a reinforcement method thereof. Background Art

[0002] The structure of a hollow slab girder bridge is usually composed of multiple hollow slab girders arranged transversely, which are connected together by hinged joints and bear the load together. The hinged joint plays a key role in ensuring the overall force of the bridge. However, as the bridge is opened to traffic for a longer period of time, due to inherent defects in the design and construction links or the loss of bearings, as well as under the natural environment and heavy traffic vehicle load conditions, the hinged joint becomes a high-risk area for diseases. Once the hinged joint is damaged and cracks appear inside, its mechanical properties are reduced, and the vertical shear force distributed to the bridge deck pavement layer above the hinged joint increases. Under the continuous influence of the load, longitudinal cracks appear in the bridge deck pavement layer, and rainwater on the pavement layer will penetrate into the hinged joint through the longitudinal cracks. This will cause certain damage to the durability of the structure in the long term. More seriously, due to the damage to the hinged joint, the lateral force transmission performance of the beam body is greatly reduced, and even a single beam stress state may occur, which will cause serious damage or even fracture of the slab girder structure.

[0003] At present, the common method for repairing the hinge joint of hollow slab beams is to break it in situ and then reconstruct it, that is, to chisel out the bridge deck pavement, clean the concrete in the damaged hinge joint area, and then add steel bars and pour high-strength concrete for repair. After the concrete is cured to the design strength, the bridge deck pavement is gradually re-laid. The re-poured concrete usually uses early-strength, high-strength and fast-setting concrete. Under the conditions of skilled and continuous construction, it takes at least 1-2 days to basically ensure the repair effect. This repair method often requires interrupting traffic, which may cause a variety of social problems in some busy traffic sections. However, in general, those places where the hinge joints are severely damaged and urgently need repair are mostly located on these sections with high traffic flow. Since the construction work surface is on the bridge deck, it is difficult to effectively control safety hazards and traffic accidents during the construction process when construction is carried out with some lanes closed. In order to deal with the above-mentioned hollow slab beam hinge repair problem under the condition that traffic cannot be closed or is difficult to close, in recent years, through continuous exploration by experts and scholars in the industry and on-site professional and technical personnel, the glue injection method and the carbon fiber plate pasting method have been invented for the hollow slab beam hinge repair work without interrupting traffic, and have been applied to a certain extent. However, the glue injection method and the carbon fiber plate pasting method are not suitable for the repair work under the condition of moderate or severe damage to the hinge, and both repair methods use the bonding force of the adhesive material to a certain extent. The adhesive material needs a certain amount of time to solidify, and during this period of time, the adhesive material is continuously subjected to the force transmitted by the upper load, which greatly weakens its bonding force after complete solidification.

[0004] Therefore, some defects in the existing maintenance methods lead to a short service life of the reinforced bridge structure, insignificant improvement in the lateral connection effect, and easy re-damage. Therefore, in the process of repairing the hinge joint of the hollow slab girder bridge, how to reduce the damage to the slab girder, improve the construction efficiency and reduce the impact on the environment has become a technical problem that technicians in this field need to solve urgently. Summary of the invention

[0005] In view of this, the present application proposes a hollow slab beam transverse rapid repair and reinforcement device and a reinforcement method thereof, which can repair the hinge joints of the hollow slab beam bridge when the bridge is in normal operation.

[0006] According to one aspect of the present application, there is provided a device for the transverse rapid repair and reinforcement of a hollow slab beam, comprising: resin glue, fiber cloth and prefabricated blocks;

[0007] The fiber cloth has a preset area;

[0008] The resin glue is coated on the opposite side plates and bottom plates of the two hollow slab beams, and the two ends of the fiber cloth in the length direction. The two ends of the fiber cloth in the length direction are respectively attached to the opposite side plates and bottom plates of the two hollow slab beams, and a filling space is preset in the middle position of the fiber cloth;

[0009] The volume of the prefabricated block matches the preset filling space of the fiber cloth, and the prefabricated block is placed in the filling space of the prefabricated cloth.

[0010] In a possible implementation, the prefabricated block is a columnar structure with a semicircular cross section;

[0011] One side of the plane of the prefabricated block abuts against the bottom side surfaces of the two hollow slab beams;

[0012] One side of the prefabricated block which is in an arc shape is covered by the fiber cloth.

[0013] In a possible implementation manner, the prefabricated block is a hollow structure.

[0014] In a possible implementation, a steel frame is provided outside the prefabricated block.

[0015] In a possible implementation, a plurality of the resin glues, the fiber cloths and the prefabricated blocks are spaced apart along the width direction of the hollow slab beam, and the spacing length is in the range of 0.2 m to 0.3 m.

[0016] In a possible implementation, the prefabricated blocks are symmetrically arranged relative to the two hollow slab beams.

[0017] A reinforcement method, using a hollow slab beam transverse rapid repair and reinforcement device, comprises the following steps:

[0018] Cleaning and polishing the specific position of the hollow slab beam where the fiber cloth is to be pasted;

[0019] Cutting out the specific size of the fiber cloth to be pasted;

[0020] The resin glue is coated on the adjacent side surfaces and bottom side surfaces of the two hollow slab beams, and the two ends of the fiber cloth are respectively adhered to the adjacent side surfaces and bottom side surfaces of the two hollow slab beams;

[0021] After the resin glue is cooled and fixed, prefabricated blocks are filled between the fiber cloth and the two hollow slab beams.

[0022] In a possible implementation, the method further includes:

[0023] Determine the specific positions on the hollow slab beam where the hollow slab beam transverse rapid repair and reinforcement devices need to be set at intervals.

[0024] In a possible implementation, cutting out the specific size of the fiber cloth to be pasted includes:

[0025] Obtaining the length and width of the fiber cloth;

[0026] Mark the two ends of the fiber cloth and stick them to the adjacent side and bottom side areas of the hollow slab beam respectively.

[0027] In a possible implementation, the method further includes:

[0028] Apply the resin glue on the adjacent side surfaces and bottom side surfaces of the two adjacent hollow slab beams that have been cleaned and polished and on the side pasting areas marked with the fiber cloth;

[0029] After coating, the fiber cloth is immediately pasted on the adjacent side surfaces and bottom side surfaces of the two hollow slab beams.

[0030] The beneficial effects of the hollow slab beam transverse rapid repair and reinforcement device and the reinforcement method thereof of the embodiment of the present application are as follows: During the repair operation, before the resin glue is completely solidified and reaches the design strength, the mass of the fiber cloth to which it is pasted and fixed on the hollow slab beam is very small, and the colloid is almost not subjected to force at this time. Even during the period when vehicles pass on the upper part of the bridge, the deformation and vibration of the bridge cause minimal damage to the adhesive force of the colloid. Therefore, the adhesive force provided by the colloid in the present invention is completely guaranteed and efficient. When the device is installed and in operation, the hollow slab beam is displaced under the load of the upper vehicle, and the displacement is transferred to the semi-elliptical prefabricated block through the adhesive force of the resin glue. The semi-elliptical prefabricated block transfers the displacement to the adjacent hollow slab beam by virtue of its own stiffness (through the adhesive force of the resin glue), thereby transmitting shear force and increasing the transverse connection between the hollow slab beams. The present invention does not require traffic enclosure and pavement excavation and milling, has a convenient and rapid construction without damaging the slab beam, is pollution-free to the environment, and is highly economical. It starts from strengthening the lateral connection capacity between hollow slab beams. Whether it is moderate damage or severe damage to the hinged joint, or preventive maintenance for minor damage, the technical solution of the present invention can be used to improve the overall service performance of the hollow slab beam bridge, reduce the risk of stress on the single plate caused by hinged joint damage, and improve the traffic safety of the bridge.

[0031] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0033] Figure 1 A schematic diagram showing the structure of a device for rapid transverse repair and reinforcement of a hollow slab beam according to an embodiment of the present application is shown;

[0034] Figure 2 A partially enlarged structural schematic diagram showing a device for rapid transverse repair and reinforcement of a hollow slab beam according to an embodiment of the present application;

[0035] Figure 3 A schematic cross-sectional view of a device for rapid transverse repair and reinforcement of a hollow slab beam according to an embodiment of the present application is shown;

[0036] Figure 4 A schematic diagram of a fiber cloth showing a device for transverse rapid repair and reinforcement of a hollow slab beam according to an embodiment of the present application;

[0037] Figure 5 A schematic front view of a prefabricated block of a device for rapid transverse repair and reinforcement of a hollow slab beam according to an embodiment of the present application is shown;

[0038] Figure 6A schematic top view of a prefabricated block of a device for rapid transverse repair and reinforcement of a hollow slab beam according to an embodiment of the present application is shown;

[0039] Figure 7 A schematic diagram showing a rubber pad of a device for rapid transverse repair and reinforcement of a hollow slab beam according to an embodiment of the present application;

[0040] Figure 8 A flow chart showing a reinforcement method according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0041] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0042] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0045] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0046] like Figure 1As shown, the hollow slab beam transverse rapid repair and reinforcement device of the embodiment of the present application includes: resin glue 2, fiber cloth 3 and prefabricated block 4, the fiber cloth 3 has a preset area, the resin glue 2 is coated on the opposite side plates and bottom plates of the two hollow slab beams 1, and the two ends of the fiber cloth 3 in the length direction, the two ends of the fiber cloth 3 in the length direction are respectively attached to the opposite side plates and bottom plates of the two hollow slab beams 1, and a filling space is preset in the middle position of the fiber cloth 3, the volume of the prefabricated block 4 matches the preset filling space of the fiber cloth 3, and is placed in the filling space of the prefabricated cloth.

[0047] In this embodiment, during the maintenance operation, before the resin glue 2 is completely solidified and reaches the design strength, the fiber cloth 3 to which it is attached and fixed on the hollow slab beam 1 is of very small mass, and the colloid is hardly subjected to force at this time. Even during the period when vehicles pass through the upper part of the bridge, the deformation and vibration of the bridge cause minimal damage to the adhesive force of the colloid. Therefore, the adhesive force provided by the colloid in the present invention is completely guaranteed and efficient. When the device is installed and takes effect, the hollow slab beam 1 is displaced under the load of the upper vehicle, and the displacement is transferred to the semi-elliptical prefabricated block 4 through the adhesive force of the resin glue 2. The semi-elliptical prefabricated block 4 transfers the displacement to the adjacent hollow slab beam 1 by virtue of its own rigidity (through the adhesive force of the resin glue 2), thereby transmitting shear force and increasing the lateral connection between the hollow slab beams 1. The present invention does not require traffic enclosure and pavement excavation and milling, has a convenient and rapid construction without damaging the slab beam, is pollution-free to the environment, and is highly economical. It starts from strengthening the lateral connection capacity between the hollow slab beams 1. Whether it is moderate damage or severe damage to the hinged joint, or preventive maintenance for minor damage, the technical solution of the present invention can be used to improve the overall service performance of the hollow slab beam 1 bridge, reduce the risk of stress on the single plate caused by the hinged joint, and improve the traffic safety of the bridge.

[0048] Among them, it should be noted that the resin glue 2 is epoxy resin glue 2, and the main raw materials of epoxy resin glue 2 are epoxy resin and curing agent, which can be used for defect repair, reinforcement and reinforcement of concrete buildings, as well as anti-impact wear, anti-cavitation and anti-freeze-thaw protection of the flow surface of hydraulic structures. The fiber cloth 3 is carbon fiber cloth 3, which has high strength: the tensile strength of carbon fiber cloth 3 can reach more than 3000MPa, which is 5 to 10 times higher than the strength of metal materials such as steel, strong durability: it will not rust, and is very suitable for use in high acid, alkali, salt and atmospheric corrosion environments, and convenient construction: no large machinery and equipment, no wet operation, no fire, no on-site fixed facilities, and the implementation of Banggong occupies less site and has high construction efficiency. It is used for tensile, shear and seismic reinforcement of structural components, and is suitable for processing the increase of building use load, change of engineering use function, material aging, concrete strength grade lower than the design value, structural crack treatment, and repair and protection of components in service in harsh environments.

[0049] like Figure 1 and Figure 6 As shown, in a specific embodiment, the prefabricated block 4 is a column structure with a semicircular cross section, the flat side of the prefabricated block 4 abuts against the bottom side of the two hollow slab beams 1, and the arc-shaped side of the prefabricated block 4 is covered by the fiber cloth 3. The two ends of the fiber cloth 3 in the length direction are pasted to the opposite side and bottom side of the two hollow slab beams 1 through the resin glue 2, and after being fixed by the resin glue 2, the fiber cloth 3 is in a relaxed state. According to the movable gap between the fiber cloth 3 and the hollow slab beam 1, the matching prefabricated block 4 can be filled to support the entire fiber cloth 3 in a tight state, so as to facilitate the fixing of the hinge joint between the two hollow slab beams 1.

[0050] Furthermore, in this specific embodiment, the cross-section of the prefabricated block 4 is a semicircular column structure, and one side of the prefabricated block 4 is flat, which fits the bottom side of the two hollow slab beams 1. When the prefabricated block 4 is placed in the fiber cloth 3, its flat side can be tightly abutted against the bottom side of the beam, forming a stable support for the fiber cloth 3, ensuring that the prefabricated block 4 will not be displaced due to uneven force during the reinforcement process, thereby ensuring the overall stability of the reinforcement device. The other side of the prefabricated block 4 is arc-shaped, so that it can be tightly covered by the fiber cloth 3. When the fiber cloth 3 is pasted on the hollow slab beam 1, its two ends will be fixed on the adjacent side and bottom side of the beam respectively, and the middle part will form a reserved filling space. At this time, the arc-shaped side of the prefabricated block 4 can just fill in this space and be tightly combined with the fiber cloth 3.

[0051] In a specific embodiment, if Figure 5 and Figure 6 As shown, the prefabricated block 4 is a hollow structure, and the prefabricated block 4 itself is made of lightweight and high-strength materials, such as lightweight concrete, foam concrete, etc., to reduce the deadweight of the reinforcement device.

[0052] Furthermore, in this specific embodiment, a steel skeleton is provided on the outside of the prefabricated block 4, which can improve the hardness of the prefabricated block 4 when the prefabricated block 4 adopts a hollow structure. Specifically, the prefabricated block 4 is a hollow structure, which reduces the weight of the prefabricated block 4 and reduces the overall deadweight of the reinforcement device. In order to further enhance the strength and stability of the prefabricated block 4, a steel skeleton is provided on the outside of the prefabricated block 4. The steel skeleton is composed of a series of carefully arranged steel bars, which are interwoven and tightly connected to form a solid support network, improve the shear and bending resistance of the prefabricated block 4, and enable it to show more excellent performance when facing complex stress conditions, and the steel skeleton is combined with the prefabricated block 4 with a hollow structure to form a reinforcement element that is both lightweight and high-strength.

[0053] The steel bar skeleton includes transverse steel bars 8 and longitudinal steel bars 9, which are arranged along the longitudinal and transverse directions of the prefabricated block 4 to improve the longitudinal and transverse shear and bending resistance of the prefabricated block 4. Specifically, the prefabricated block 4 is a column structure with a semicircular cross section, and two penetrating weight-reducing holes are opened along the length direction. The cross section of the weight-reducing holes is 1 / 4 of a circle, and the shape of the two weight-reducing holes is the same as the cross section of the prefabricated block 4.

[0054] The prefabricated block 4 includes a first plane abutting against the hollow slab beam 1, an arc-shaped second plane in contact with the fiber cloth 3, and a third plane and a fourth plane that are semicircular in front and back. The first plane is provided with transverse steel bars 8 and longitudinal steel bars 9 arranged horizontally and vertically, the second plane is provided with transverse steel bars 8 and longitudinal steel bars 9 matching the arc, and the third plane is provided with steel bars surrounding the edge of the weight-reducing hole, so as to fix the positions of the third and fourth planes where the weight-reducing holes are opened.

[0055] In a specific embodiment, if Figure 3 As shown, multiple resin glues 2, fiber cloths 3 and prefabricated blocks 4 are arranged at intervals along the width direction of the hollow slab beam 1, and the interval length is in the range of 0.2m-0.3m. Each hollow slab beam 1 transverse rapid repair and reinforcement device includes a fiber cloth 3, a prefabricated block 4 and resin glue 2. In the twisted joints of two adjacent hollow slab beams 1, multiple hollow slab beam 1 transverse rapid repair and reinforcement devices are arranged in the horizontal direction to improve the shear resistance of the two adjacent hollow slab beams 1.

[0056] The prefabricated blocks 4 are symmetrically arranged relative to the two hollow slab beams 1 , and one of the weight-reducing holes corresponds to one of the hollow slab beams 1 .

[0057] A reinforcement method such as Figure 8 As shown, the hollow slab beam 1 is used for transverse rapid repair and reinforcement, comprising the following steps:

[0058] S100, cleaning and polishing the specific position of the hollow slab beam 1 where the fiber cloth 3 has been pasted;

[0059] In this step, oil, dust and loose materials on the surface of the hollow slab beam 1 are removed to ensure that the bonding surface is clean and flat, which is convenient for the subsequent coating of the resin glue 2 and the bonding of the fiber cloth 3.

[0060] Among them, first use steel bars of appropriate thickness to dig out the soil accumulated in the plate joint between the two hollow plate beams 1, as well as the hemp fibers and broken concrete at the bottom of the hinge joint. Then use a special wire brush to brush off the dust, mud, oil and other dirt adhering to both sides of the plate joint. Finally, use a high-pressure water gun to clean the plate joint to remove the mud, debris, oil and other debris in the plate joint. Before pasting the fiber cloth 3, ensure that the veneer surfaces of each station in the hinge joint are clean, dry and free of oil.

[0061] S200, cutting out the specific size of the fiber cloth 3 to be pasted;

[0062] In this embodiment, the specific size of the fiber cloth 3 to be pasted is cut according to the size and reinforcement requirements of the hollow slab beam 1. During the cutting process, the length and width of the fiber cloth 3 are obtained, and the areas where the two ends of the fiber cloth 3 need to be pasted to the adjacent side and bottom side of the hollow slab beam 1 are marked.

[0063] Specifically, the length and width of the fiber cloth 3 are as follows: the fiber cloth 3 is cut to a length of 1480 mm and a width of 300 mm.

[0064] S300, resin glue 2 is coated on the adjacent side surfaces and bottom side surfaces of the two hollow slab beams 1, and two ends of the fiber cloth 3 are respectively pasted on the adjacent side surfaces and bottom side surfaces of the two hollow slab beams 1;

[0065] In this embodiment, the fiber cloth 3 is a square structure, and the two ends in the length direction are the positions for pasting the adjacent side surfaces and bottom sides of the hollow slab beam 1. The fiber cloth 3 can be set to 5 positions along the length direction, including: a first cloth surface pasted to the adjacent side surface of a hollow slab beam 1, a second cloth surface pasted to the bottom side surface of a hollow slab beam 1, a third cloth surface for placing and covering the prefabricated block 4, a fourth cloth surface pasted to the bottom side surface of another hollow slab beam 1, and a fifth cloth surface pasted to the adjacent side surface of another hollow slab beam 1, to ensure that the fiber cloth 3 fits tightly against the hollow slab horizontally and that space can be reserved for filling the prefabricated block 4.

[0066] Among them, the two ends of the fiber cloth 3 are marked to be pasted to the outer side surface and the bottom plate surface of the web of the hollow slab beam 1 respectively, and the two ends along the length direction of the fiber cloth 3 are marked 200mm to the middle as the pasting area with the side surface of the web of the hollow slab beam 1, and the two ends along the length direction of the fiber cloth 3 are marked 150mm to the middle as the pasting area with the bottom surface of the bottom plate of the hollow slab beam 1. Specifically, the first and fifth cloth surfaces are the first coating area 6 matching the adjacent side panels, with a length of 200mm, and the second and fourth cloth surfaces are the second coating area 7 matching the bottom side panels, with a length of 150mm.

[0067] Among them, resin glue 2 is applied on the first cloth surface and the fifth cloth surface marked with fiber cloth 3 on the web side surfaces of adjacent hollow slab beams 1 that have been cleaned and polished. After the application is completed, the fiber cloth 3 is immediately pasted on the adjacent side surfaces of the hollow slab beam 1, and it is ensured that the two are firmly and reliably pasted. In order to make the fiber cloth 3 and the adjacent side surfaces of the hollow slab beam 1 more reliably bonded, a steel plate can be filled into the plate seam for pressing. After the strength of the resin glue 2 used for pasting meets the requirements, apply epoxy resin glue 2 on the bottom plate surface of the adjacent hollow slab beams 1 that have been cleaned and polished and the second and fourth cloth surfaces marked with the fiber cloth 3. Immediately after the application is completed, the bottom surface of the fiber cloth 3 that has been pasted in the side area, the second and fourth cloth surfaces are pasted on the bottom plate surface of the hollow slab beam 1, and ensure that the two are firmly and reliably pasted. In order to make the fiber cloth 3 and the bottom surface of the bottom plate of the hollow slab beam 1 more reliably bonded, the fiber cloth 3 can be pressed toward the bottom of the slab beam. At the same time, in order to keep the bottom surfaces of the two adjacent hollow slab beams 1 behind the carbon fiber cloth 3 as horizontal as possible, the leveling work can be carried out by changing the local thickness of the resin glue 2 applied on the side of the bottom plate of the hollow cross beam.

[0068] S400, after the resin glue 2 is cooled and fixed, the prefabricated blocks 4 are filled between the fiber cloth 3 and the two hollow slab beams 1;

[0069] In this embodiment, the prefabricated blocks 4 should be tightly filled in the filling space of the fiber cloth 3 to ensure the stability of the reinforcement device.

[0070] Among them, after the strength of the resin glue 2 used for pasting meets the requirements, the semi-elliptical prefabricated block 4 is filled in the wrapped space formed by the fiber cloth 3 and the hollow slab beam 1, and a time period with relatively small traffic volume is selected to fill the space from the support position to the mid-span direction. At this time, the deformation difference between the hollow slab beams 1 with damaged hinge joints and the overall deflection of the slab beams are smaller than those in the time period with large traffic volume, and the smaller the deformation difference between the slab beams closer to the support point, the more conducive to filling and improving the ability of adjacent slab beams to transmit shear forces laterally in advance of the mid-span, which provides a certain amount of assistance in reducing the deformation difference between adjacent slab beams in the mid-span area, thereby increasing the operability of filling the semi-elliptical prefabricated block 4 in the mid-span.

[0071] In a specific embodiment, the following steps are also included:

[0072] Determine the specific positions of the beam body where the fiber cloth 3 needs to be pasted at intervals;

[0073] In this step, the shear force is transmitted through shear deformation. According to the stress characteristics of the hinged plate girder bridge, the slab girder transmits the largest shear force laterally at the mid-span, and the closer to the support, the smaller the lateral shear force. Therefore, a carbon fiber cloth pasting position is arranged in the middle of the hollow plate girder 1 (0-1 / 4) L and (3 / 4-1) L (i.e., L / 8 and 7L / 8), and a fiber cloth 3 pasting position is arranged every 400 mm in the hollow plate girder 1 (1 / 4-3 / 4) L (symmetrical arrangement).

[0074] In a specific embodiment, cutting out the specific size of the fiber cloth 3 to be pasted includes:

[0075] S210, obtaining the length and width of the fiber cloth 3;

[0076] In this embodiment, the length and width of the fiber cloth 3 can be cut according to the hinged seam between two adjacent hollow slab beams 1. The specific length is 1480 mm and the width is 300 mm.

[0077] S220, marking the two ends of the fiber cloth 3, which need to be pasted to the adjacent side surface and the bottom side surface of the hollow slab beam 1 respectively.

[0078] In a specific embodiment, the following steps are also included:

[0079] Resin glue 2 is applied on the adjacent side and bottom sides of two adjacent hollow slab beams 1 that have been cleaned and polished, and on the side pasting areas marked with fiber cloth 3; after the coating is completed, the fiber cloth 3 is immediately pasted on the adjacent side and bottom sides of the two hollow slab beams 1.

[0080] In a specific embodiment, the following steps are also included:

[0081] When there is still a certain amount of movable clearance in the space after the prefabricated block 4 is filled, rubber pads 5 are respectively filled on both sides of the top of the prefabricated block 4.

[0082] In this embodiment, Figure 7 As shown, the rubber pad 5 makes the wrapped area full and free of moving space, and the top surface of the prefabricated block 4 is kept as a horizontal plane. When there is a certain height difference on the bottom surface of the hollow slab beam 1 with damaged hinge joints, the height difference from the top of the prefabricated block 4 to the bottom of the two adjacent hollow slab beams 1 in a horizontal state needs to be measured before filling the rubber pad 5, and a slightly thick rubber pad 5 of about 1mm is selected for filling. During the filling process, in order to avoid damage to the prefabricated block 4, a rubber hammer can be used to tap slowly and gently for many times to completely embed the rubber pad 5 into the wrapped space. Among them, the wrapped space is the gap between the flat structure side of the prefabricated block 4 and the bottom side of the hollow slab beam 1.

[0083] In addition, after the rubber pad 5 is used to fill the wrapping space, the fiber cloth 3 and the resin glue 2 are used to seal the two open ends thereof to prevent the prefabricated block 4 and the rubber pad 5 from sliding and falling under the long-term vibration of the hollow slab beam 1.

[0084] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A device for the transverse rapid repair and reinforcement of hollow slab beams, suitable for fixing two adjacent hollow slab beams, characterized in that: include: Resin glue, fiber cloth and prefabricated blocks; The fiber cloth has a preset area; The resin glue is coated on the opposite side plates and bottom plates of the two hollow slab beams, and the two ends of the fiber cloth in the length direction. The two ends of the fiber cloth in the length direction are respectively attached to the opposite side plates and bottom plates of the two hollow slab beams, and a filling space is preset in the middle position of the fiber cloth; The volume of the prefabricated block matches the preset filling space of the fiber cloth, and the prefabricated block is placed in the filling space of the prefabricated cloth.

2. The hollow slab beam transverse rapid repair and reinforcement device according to claim 1 is characterized in that: The prefabricated block is a columnar structure with a semicircular cross section; One side of the plane of the prefabricated block abuts against the bottom side surfaces of the two hollow slab beams; One side of the prefabricated block which is in an arc shape is covered by the fiber cloth.

3. The hollow slab beam transverse rapid repair and reinforcement device according to claim 1 is characterized in that: The prefabricated block is a hollow structure.

4. The hollow slab beam transverse rapid repair and reinforcement device according to claim 3 is characterized in that: A steel bar skeleton is arranged outside the prefabricated block.

5. The hollow slab beam transverse rapid repair and reinforcement device according to any one of claims 1 to 4, characterized in that: The plurality of resin glues, fiber cloths and prefabricated blocks are arranged at intervals along the width direction of the hollow slab beam, and the interval length is in the range of 0.2m-0.3m.

6. The hollow slab beam transverse rapid repair and reinforcement device according to claim 5 is characterized in that: The prefabricated blocks are symmetrically arranged relative to the two hollow slab beams.

7. A reinforcement method, using the hollow slab beam transverse rapid repair and reinforcement device according to any one of claims 1 to 6, characterized in that: The steps include: Cleaning and polishing the specific position of the hollow slab beam where the fiber cloth is to be pasted; Cutting out the specific size of the fiber cloth to be pasted; The resin glue is coated on the adjacent side surfaces and bottom side surfaces of the two hollow slab beams, and the two ends of the fiber cloth are respectively adhered to the adjacent side surfaces and bottom side surfaces of the two hollow slab beams; After the resin glue is cooled and fixed, prefabricated blocks are filled between the fiber cloth and the two hollow slab beams.

8. The reinforcement method according to claim 7, characterized in that: Also includes: Determine the specific positions on the hollow slab beam where the hollow slab beam transverse rapid repair and reinforcement devices need to be set at intervals.

9. The reinforcement method according to claim 7, characterized in that: The specific sizes of the fiber cloth to be pasted include: Obtaining the length and width of the fiber cloth; Mark the two ends of the fiber cloth and stick them to the adjacent side and bottom side areas of the hollow slab beam respectively.

10. The hollow slab beam transverse rapid repair and reinforcement device and reinforcement method thereof according to claim 9, characterized in that: Also includes: Apply the resin glue on the adjacent side surfaces and bottom side surfaces of the two adjacent hollow slab beams that have been cleaned and polished and on the side pasting areas marked with the fiber cloth; After coating, the fiber cloth is immediately pasted on the adjacent side surfaces and bottom side surfaces of the two hollow slab beams.

Images