External prestress reinforcing device for simply supported beam of railway

Abstract

The utility model provides an external prestressing reinforcing device for a simply supported beam of a railway, which comprises anchoring devices, a steering device and a prestressing tendon, and the anchoring devices are respectively arranged at two ends of the simply supported beam of the railway; the steering device is connected with the railway simply supported beam and located in the area between the two ends of the railway simply supported beam. The two ends of the prestressing tendon are connected with the anchoring devices respectively and arranged in the steering device in a penetrating mode. By the adoption of the external prestress reinforcing device for the railway simply-supported beam, the bearing capacity of the railway simply-supported beam can be remarkably improved, the bending resistance and the shearing resistance of the railway simply-supported beam can be improved, the external prestress reinforcing device is particularly suitable for a large-span bridge, and in addition, the external prestress reinforcing device for the railway simply-supported beam can be used for reinforcing the external prestress of the railway simply-supported beam. And the damage to the concrete during on-site construction can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of railway simply supported beam technology, specifically to an external prestressing reinforcement device for railway simply supported beams. Background Technology

[0002] Simply supported beams are widely used in the railway field. In the fastening process of simply supported beams, reinforcement devices are usually used to increase their safety. However, the current reinforcement devices require a large amount of work to be done on site and cause some damage to the concrete of the simply supported beams during construction. Therefore, the reinforcement devices for simply supported beams of railways urgently need to be improved. Summary of the Invention

[0003] The purpose of this utility model is to provide an external prestressed reinforcement device for simply supported railway beams to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] This utility model provides an external prestressing reinforcement device for simply supported railway beams, the device comprising:

[0006] Anchoring devices are provided at both ends of the simply supported railway beam;

[0007] A steering device, which is connected to the simply supported railway beam and located in the area between the two ends of the simply supported railway beam;

[0008] The prestressed tendon has its two ends connected to the anchoring device and passes through the steering device.

[0009] The external prestressing reinforcement device for simply supported railway beams provided by this utility model can significantly improve the load-bearing capacity of simply supported railway beams, enhance their bending and shear resistance, and is especially suitable for long-span bridges. Furthermore, the external prestressing reinforcement device for simply supported railway beams provided by this utility model can reduce the damage to concrete during on-site construction.

[0010] In some embodiments of this utility model, the external prestressing reinforcement device for railway simply supported beams further includes a fastening assembly, and the steering device is connected to the bottom of the railway simply supported beam through the fastening assembly.

[0011] By fixing the steering device to the bottom of the railway simply supported beam using fastening components, a detachable connection between the steering device and the railway simply supported beam can be achieved. The fastening components can also be replaced, facilitating later maintenance and upkeep.

[0012] The steering device is connected to the prestressed tendon. By changing the direction of the prestressed tendon through the steering device, it can also support the prestressed tendon.

[0013] In some embodiments of this utility model, the external prestressed reinforcement device for simply supported railway beams includes multiple steering devices, and the multiple steering devices are spaced apart.

[0014] By setting up multiple steering devices and arranging them at different positions on the railway simply supported beam, the direction of the prestressed tendons and the prestress applied by the prestressed tendons to the railway simply supported beam can be adjusted.

[0015] Multiple steering devices can also be evenly and spaced at different positions on the railway simply supported beam, thereby making the prestress borne by each position of the entire railway simply supported beam more balanced.

[0016] In some embodiments of this utility model, the external prestressed reinforcement device for simply supported railway beams further includes a tie rod assembly, and two adjacent steering devices can be connected into a whole through the tie rod assembly.

[0017] By connecting adjacent steering devices into a single unit using tie rod assemblies, the stability of the entire railway simply supported beam is improved, enabling the railway simply supported beam to withstand greater loads and achieve higher stability.

[0018] In some embodiments of this utility model, the anchoring device is fixedly connected to both ends of the railway simply supported beam by anchor bolts that penetrate the web.

[0019] By fixing the prestressed tendons to both ends of the railway simply supported beam using anchoring devices, the railway simply supported beam can have higher stability, and the prestress applied to the railway simply supported beam can be more stable and effective.

[0020] In some embodiments of this utility model, the bending angle of the prestressed tendon is 2°~30°.

[0021] In some embodiments of this utility model, the friction surface between the steering device and the prestressed tendon is a fluoropolymer-coated sliding plate, a polytetrafluoroethylene sliding plate, or a stainless steel sliding plate.

[0022] In some embodiments of this utility model, the anchoring device is a steel structure, and the surface of the anchoring device is provided with a multi-element powder co-diffusion layer, a passivation layer and a sealing layer.

[0023] In some embodiments of this utility model, the tensile strength of the prestressed tendon is 1860MPa to 2400MPa.

[0024] In some embodiments of this utility model, the prestressed strand is a steel strand, and the surface of the steel strand is galvanized, galvanized aluminum alloy, monofilament epoxy, or covered with a PE sheath.

[0025] Applying anti-corrosion or anti-rust layers to the surfaces of anchoring devices and prestressed tendons can improve their durability.

[0026] The external prestressed tendons provided in this invention are used to reinforce simply supported railway beams. By bending the prestressed steel tendons at the quarter-point, the crack resistance safety factor and shear bearing capacity are improved simultaneously. The reinforcement device can be composed of pre-cast prestressed tendons and steel components. Compared with traditional reinforcement devices, the external prestressed reinforcement device for simply supported railway beams of this invention has a clear overall structural stress distribution, requires less on-site construction work, and causes less damage to the existing beam concrete. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the external prestressed reinforcement device of this utility model installed on a simply supported railway beam;

[0028] Figure 2 for Figure 1 Enlarged view after AA sectioning;

[0029] Figure 3 for Figure 1 Enlarged view of BB after cross-section.

[0030] In the picture:

[0031] 100. External prestressing reinforcement device for simply supported railway beams; 110. Anchoring device; 120. Steering device; 130. Prestressed tendon; 140. Fastening assembly; 150. Tie rod assembly; 160. Simply supported railway beam. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0033] Figure 1 This is a schematic diagram of the external prestressed reinforcement device of this utility model installed on a simply supported railway beam. Figure 2 for Figure 1 Enlarged view after AA section. Figure 3 for Figure 1 Enlarged view of BB after cross-section.

[0034] Combination Figure 1 , Figure 2 and Figure 3This utility model provides an external prestressing reinforcement device 100 for railway simply supported beams. The external prestressing reinforcement device 100 for railway simply supported beams includes an anchoring device 110, a steering device 120 and a prestressing bundle 130. After the anchoring device 110, the steering device 120 and the prestressing bundle 130 are connected to the railway simply supported beam 160, prestress is applied to the railway simply supported beam 160.

[0035] Anchorage devices 110 are provided at both ends of the railway simply supported beam 160. The steering device 120 is connected to the railway simply supported beam 160 and is located in the area between the two ends of the railway simply supported beam 160. The two ends of the prestressed tendon 130 are connected to the anchorage devices 110 and pass through the steering device 120.

[0036] The external prestressing reinforcement device 100 for railway simply supported beams provided by this utility model can significantly improve the load-bearing capacity of the railway simply supported beam 160, enhance its bending and shear resistance, and is especially suitable for long-span bridges. Furthermore, the external prestressing reinforcement device 100 for railway simply supported beams provided by this utility model can reduce the damage to concrete during on-site construction.

[0037] In one embodiment of the present invention, the external prestressing reinforcement device 100 for railway simply supported beams further includes a fastening assembly 140, and the steering device 120 is connected to the bottom of the railway simply supported beam 160 through the fastening assembly 140.

[0038] The steering device 120 is connected to the bottom of the railway simply supported beam 160 by anchoring adhesive, and is also fixed to the bottom of the railway simply supported beam 160 by anchoring bolts. The anchoring bolts only serve to bear the weight of the steering device 120 and do not bear shear force.

[0039] By fixing the steering device 120 to the bottom of the railway simply supported beam 160 with the fastening component 140, a detachable connection between the steering device 120 and the railway simply supported beam 160 can be achieved, and the fastening component 140 can also be replaced, which facilitates later maintenance and upkeep.

[0040] The steering device 120 is connected to the prestressed tendon 130. The steering device 120 can change the direction of the prestressed tendon 130 and also support the prestressed tendon 130.

[0041] In one embodiment of the present invention, the external prestressed reinforcement device 100 for railway simply supported beams includes a plurality of steering devices 120, and the plurality of steering devices 120 are spaced apart.

[0042] By setting multiple steering devices 120 and arranging them at different positions on the railway simply supported beam 160, the direction of the prestressed tendons 130 and the prestress applied by the prestressed tendons 130 to the railway simply supported beam 160 are adjusted.

[0043] Multiple steering devices 120 can also be evenly and spaced at different positions of the railway simply supported beam 160, so that the prestress borne by each position of the entire railway simply supported beam 160 is more balanced.

[0044] The steering device 120 can be configured as one or two components. When there is one steering device 120, it can be arranged at the mid-span. When there are two steering devices 120, they can be arranged near the mid-span of 1 / 4 and 3 / 4 of the span.

[0045] In one embodiment of this utility model, the external prestressed reinforcement device 100 for railway simply supported beams further includes a tie rod assembly 150, and two adjacent steering devices 120 can be connected into a whole through the tie rod assembly 150.

[0046] The tie rod assembly 150 connects the adjacent steering devices 120 into one unit, which improves the stability of the entire railway simply supported beam 160, enabling the railway simply supported beam 160 to withstand greater loads and have higher stability.

[0047] The two steering units 120 can be connected as a whole by steel tie rods or carbon fiber tie rods, thereby eliminating the longitudinal unbalanced force on the individual tie rods.

[0048] In one embodiment of the present invention, the anchoring device 110 is fixedly connected to both ends of the railway simply supported beam 160 by anchor bolts that penetrate the web.

[0049] The anchoring device 110 is fixed to the beam end by anchor bolts that penetrate the web. The structural stress is clear during the design calculation, and there is no need to consider the anchoring bearing capacity of the old beam concrete.

[0050] By fixing the prestressed tendons 130 to both ends of the railway simply supported beam 160 through the anchoring device 110, the railway simply supported beam 160 can have higher stability, and the prestress applied to the railway simply supported beam 160 can be more stable and effective.

[0051] In one embodiment of this utility model, the bending angle of the prestressed tendon 130 is 2°~30°.

[0052] The bending angle of the prestressed tendon 130 is 2°~30°, which improves the shear bearing capacity of the web.

[0053] In one embodiment of this utility model, the friction surface between the steering device 120 and the prestressed tendon 130 is a fluoropolymer coated sliding plate, a polytetrafluoroethylene sliding plate, or a stainless steel sliding plate.

[0054] In one embodiment of the present invention, the anchoring device 110 is a steel structure, and the surface of the anchoring device 110 is provided with a multi-element powder co-diffusion layer, a passivation layer and a sealing layer.

[0055] In one embodiment of this utility model, the tensile strength of the prestressed tendon 130 is 1860MPa to 2400MPa.

[0056] The prestressed strands can be made of steel strands or carbon fiber cables of 1860MPa, 2000MPa, 2100MPa, 2200MPa, 2300MPa, or 2400MPa grades. The steel strands are protected against corrosion by galvanizing, galvanized aluminum alloy, monofilament epoxy, or steel strands with PE sheaths.

[0057] In one embodiment of this utility model, the prestressed strand 130 is made of steel strand, and the surface of the steel strand is galvanized, galvanized aluminum alloy, monofilament epoxy, or covered with a PE sheath.

[0058] The external prestressed tendons 130 provided by this utility model are used to reinforce a simply supported railway beam 160. By bending the prestressed steel tendons at the quarter mark, the crack resistance safety factor and shear bearing capacity are improved. The reinforcement device can be composed of pre-cast prestressed tendons 130 and steel components. Compared with traditional reinforcement devices, the external prestressed reinforcement device 100 for simply supported railway beams of this utility model has a clear overall structural stress distribution, requires less on-site construction work, and causes less damage to the existing beam concrete.

[0059] It should be further explained that prestressed simply supported beams are constructed by pre-stressing the beam structure, thereby enabling them to better resist external loads during service. The design principle of prestressed concrete simply supported beams is based on prestressing technology, which involves applying pressure to the concrete structure before it bears a load, giving the concrete better compressive and crack resistance when subjected to external loads. This technology can significantly improve the load-bearing capacity of beams, meeting the load requirements of railway transportation.

[0060] This pre-applied stress alters the internal stress state of the beam, thus affecting the mechanical properties of the simply supported railway beam, including its vibration frequency. The geometry of the simply supported railway beam also influences the vibration frequency under prestress. Longer, wider, or thicker beams may exhibit different vibration frequency variations under prestress compared to smaller beams. Generally, for larger beams, the increase in vibration frequency with increasing prestress may be relatively smaller.

[0061] The railway bridge uses prestressed concrete simply supported beams as the main span structure. The design must consider factors such as load, span, and material properties. Specific key points include selecting appropriate prestressed steel bars and concrete strength grades, determining the span and cross-sectional dimensions of the simply supported beams, and optimizing beam segment splicing and hoisting schemes.

[0062] The external prestressed reinforcement device 100 for railway simply supported beams provided by this utility model can enable railway simply supported beams 160 to have high load-bearing capacity, good crack resistance, strong durability and convenient construction; the prestress significantly improves bending and shear resistance, and is suitable for long-span (≥32m) bridges; crack control extends service life, with a design life of ≥100 years; it also has good economic benefits, saving 30-40% of steel and reducing later maintenance costs.

[0063] In this utility model, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various components or elements of this utility model and do not specifically refer to any component or element in this utility model. They should not be construed as limiting this utility model.

Claims

1. A prestressed reinforcement device for simply supported railway beams, characterized in that, The external prestressed reinforcement device for the simply supported railway beam includes: Anchoring devices are provided at both ends of the simply supported railway beam; A steering device, which is connected to the simply supported railway beam and located in the area between the two ends of the simply supported railway beam; The prestressed tendon has its two ends connected to the anchoring device and passes through the steering device.

2. The external prestressing reinforcement device for simply supported railway beams according to claim 1, characterized in that, The external prestressing reinforcement device for the railway simply supported beam also includes a fastening assembly, and the steering device is connected to the bottom of the railway simply supported beam through the fastening assembly.

3. The external prestressing reinforcement device for simply supported railway beams according to claim 2, characterized in that, The external prestressing reinforcement device for simply supported railway beams includes multiple steering devices, and the multiple steering devices are spaced apart from each other.

4. The external prestressing reinforcement device for simply supported railway beams according to claim 3, characterized in that, The external prestressed reinforcement device for simply supported railway beams also includes a tie rod assembly, which can connect two adjacent steering devices into a whole.

5. The external prestressing reinforcement device for simply supported railway beams according to claim 1, characterized in that, The anchoring device is fixedly connected to both ends of the railway simply supported beam by anchor bolts that penetrate the web.

6. The external prestressing reinforcement device for simply supported railway beams according to any one of claims 1-5, characterized in that, The bending angle of the prestressed tendon is 2°~30°.

7. The external prestressing reinforcement device for simply supported railway beams according to claim 6, characterized in that, The friction surface between the steering device and the prestressed tendon is made of fluoropolymer coated plate, polytetrafluoroethylene plate, or stainless steel plate.

8. The external prestressing reinforcement device for simply supported railway beams according to claim 6, characterized in that, The anchoring device is a steel structure, and its surface is provided with a multi-element powder co-infiltration layer, a passivation layer, and a sealing layer.

9. The external prestressing reinforcement device for simply supported railway beams according to claim 6, characterized in that, The tensile strength of the prestressed tendon is between 1860 MPa and 2400 MPa.

10. The external prestressing reinforcement device for simply supported railway beams according to claim 9, characterized in that, The prestressed strands are made of steel strands, and the surface of the steel strands is galvanized, galvanized aluminum alloy, monofilament epoxy, or covered with a PE sheath.

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