Wind-resistant lifting railway T-beam bridge cable trough RPC cover plate fixing structure

Abstract

The invention relates to an anti-wind lifting railway T-beam bridge cable trough RPC cover plate fixing structure which comprises a U-shaped groove, a vertical connecting device and an RPC cover plate. A strip-shaped hoisting hole is formed in a bottom plate of the U-shaped groove; the vertical connecting device comprises a limiting bottom plate and a screw rod, the limiting bottom plate is strip-shaped, and the bottom end of the screw rod is fixed to the top surface of the limiting bottom plate; after the limiting bottom plate is inserted into the hoisting hole, the limiting bottom plate is rotated to be perpendicular to the hoisting hole, so that the limiting bottom plate is clamped below the bottom plate of the U-shaped groove; bolt holes are formed in the RPC cover plate, and after the RPC cover plate covers the top of the U-shaped groove, the screws are upwards inserted into the bolt holes of the RPC cover plate and fixed. The special rectangular pressure relief notch is designed in the structure, the aerodynamic lift force can be remarkably reduced, meanwhile, the path that strong wind is poured into the U-shaped groove to impact the bottom of the cover plate is blocked by means of the plugging function of the stainless steel component, and the possibility that the cover plate is wholly turned over is eradicated from the physical mechanism through mechanical anchoring provided by the bolts.

Description

Technical Field

[0001] This invention relates to the field of railway bridge engineering technology, specifically to a wind-resistant RPC cover plate fixing structure for cable troughs in railway T-beam bridges. Background Technology

[0002] U-shaped channels are typically installed in the pedestrian walkway areas on both sides of simply supported T-beam railway bridges for laying power, communication, and signal cables. These cable channels are covered with concrete slabs to protect the cables and ensure pedestrian access. RPC (Reactive Powder Concrete) slabs are durable, possessing extremely high compressive and flexural strength. They allow for thinner slabs while meeting the strength requirements for cable channel coverage, thus reducing the slab's weight and effectively decreasing the secondary dead load on the bridge deck. In standard designs in this field, such as the general reference drawings for railway engineering construction published by China Railway Engineering Design & Consulting Group Co., Ltd., "Tongqiao (2017) 2101 and Tongqiao (2017) 2201," the cable channels on the pedestrian walkways of simply supported T-beam railway bridges use 25mm thick RPC slabs.

[0003] However, the current installation method for RPC covers and U-shaped channels generally uses cement mortar for tight bonding. This traditional method poses certain safety hazards when facing the complex wind loads generated during railway operation, and its failure process exhibits both gradual and sudden characteristics.

[0004] (1) Insufficient structural resistance to wind uplift: The tensile strength provided by the mortar joint mainly depends on the bonding force of the material and the limited self-weight of the RPC cover plate. When a train passes over the bridge or in a strong wind environment, the upper and lower surfaces of the RPC cover plate will generate a severe pressure difference due to aerodynamic effects, forming a strong instantaneous aerodynamic suction force. This suction force can easily exceed the structural resistance limit of the mortar joint, causing the RPC cover plate to be directly lifted.

[0005] (2) Long-term fatigue damage and performance degradation: In addition to the instantaneous huge suction force, the RPC cover plate is also subjected to the fatigue effect caused by the repeated impact of the train wind. At the same time, in areas with strong winds, the natural wind flow repeatedly enters through the lifting holes at the bottom of the U-shaped groove, continuously impacting the bottom of the cover plate. This long-term, reciprocating pulsating wind pressure will cause fatigue microcracks in the grouting mortar, leading to the gradual deterioration of its bonding performance and a serious weakening of its fixing effect.

[0006] (3) Instantaneous failure and safety risks: When the jointing mortar deteriorates significantly due to the above process or its own aging, the effective connection between the cover plate and the U-shaped channel can no longer be guaranteed. At this time, if an extreme instantaneous strong wind occurs, the coupling effect of the train wind and the natural wind will generate an upward load far exceeding the traditional design expectation, which will eventually cause the RPC cover plate to be blown off as a whole and fall beside the railway line or even within the driving range, directly endangering the safety of train operation.

[0007] Therefore, it is necessary to propose new measures to overcome the above-mentioned shortcomings. Summary of the Invention

[0008] The purpose of this invention is to provide a wind-resistant fixing structure for the RPC cover plate of the cable trough on railway T-beam bridges, so as to solve the problem of wind resistance of existing cable trough RPC cover plates.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0010] A wind-resistant railway T-beam bridge cable trough RPC cover plate fixing structure is provided, the structure includes a U-shaped trough, a vertical connecting device and an RPC cover plate;

[0011] The bottom plate of the U-shaped groove is provided with a vertically penetrating hoisting hole, which is strip-shaped;

[0012] The vertical connecting device includes a limiting base plate and a screw. The limiting base plate is strip-shaped, and the bottom end of the screw is fixed to the top surface of the limiting base plate and is perpendicular to the limiting base plate.

[0013] After the limiting base plate is inserted into the lifting hole, it is rotated to be perpendicular to the lifting hole, so that the limiting base plate is stuck under the base plate of the U-shaped groove;

[0014] The RPC cover plate is provided with bolt holes. After the RPC cover plate covers the top of the U-shaped groove, the screw is inserted upward into the bolt holes of the RPC cover plate and fixed.

[0015] Furthermore, a vertical cylinder is provided at the top of the limiting base plate, and the width of the vertical cylinder is smaller than the width of the limiting base plate;

[0016] After the limiting base plate is inserted into the hoisting hole, the vertical cylinder is inserted into the hoisting hole.

[0017] Furthermore, a limiting top plate is provided at the top of the vertical cylinder, the width of the vertical cylinder is smaller than the width of the limiting top plate, and a through hole for inserting the screw is provided on the limiting top plate;

[0018] After the limiting bottom plate is inserted into the lifting hole, the limiting top plate is located above the bottom plate of the U-shaped groove. When the limiting bottom plate is rotated to be perpendicular to the lifting hole, the limiting top plate also rotates and is locked above the bottom plate of the U-shaped groove.

[0019] Furthermore, the bottom plate of the U-shaped groove has chamfers on both sides, and the top plate of the limiting plate is provided with a top inclined support plate on one side;

[0020] When the limiting top plate is engaged above the bottom plate of the U-shaped groove, the top inclined support plate is located above the chamfer of the bottom plate.

[0021] Furthermore, the top of the screw has external threads. After the screw is inserted upward into the bolt hole of the RPC cover plate, a perforated steel washer is installed and fixed with a nut.

[0022] Furthermore, the RPC cover plate is provided with a vertically penetrating rectangular pressure relief slot, which is arranged horizontally on the RPC cover plate.

[0023] Furthermore, the joints of the RPC cover plate are sealed with grout.

[0024] Furthermore, the U-shaped groove is located on the top of the I-beam fixed outside the T-beam, and a railing post is provided on the outside of the U-shaped groove.

[0025] Furthermore, a positioning pin is fixed to the top of the I-beam crossbeam, and a positioning hole corresponding to the positioning pin is provided on the bottom plate of the U-shaped groove.

[0026] When the U-shaped groove is placed on top of the I-beam, the positioning pin is inserted into the positioning hole.

[0027] Furthermore, the positioning hole is filled with mortar.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] This invention provides a wind-resistant RPC cover fixing structure for cable troughs on railway T-beam bridges. The structure incorporates a special rectangular pressure relief slot, significantly reducing aerodynamic lift. Simultaneously, the stainless steel components block the path of strong winds entering the U-shaped channel and impacting the bottom of the cover. Mechanical anchoring with bolts physically eliminates the possibility of the cover being completely overturned. Furthermore, the effective sealing of the lifting holes by the stainless steel components and the pre-designed rectangular pressure relief slot on the RPC cover significantly reduce repeated pulse impacts on the cover and grouting mortar caused by train winds and natural winds, greatly delaying the fatigue degradation process of the materials and thus improving the reliability and durability of the entire fixing system during long-term operation. In addition, the stainless steel components feature a unique rotating snap-fit ​​design, naturally forming an anti-fall-off mechanism during installation, preventing instantaneous failure and effectively avoiding the risk of small components accidentally falling during high-altitude operations on the bridge deck. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the pedestrian walkway layout of a railway T-beam bridge provided in an embodiment of the present invention.

[0032] Figure 2 This is a schematic diagram of the cross-sectional layout of the pedestrian walkway at the I-beam of a railway T-beam bridge, provided in an embodiment of the present invention.

[0033] Figure 3 This is a schematic diagram of the cross-sectional layout of the pedestrian walkway at the U-shaped groove hoisting hole of the railway T-beam bridge provided in an embodiment of the present invention.

[0034] Figure 4 This is a schematic diagram of the U-shaped groove planar arrangement provided in an embodiment of the present invention.

[0035] Figure 5 This is a schematic diagram of the elevation of the vertical connecting device provided in an embodiment of the present invention.

[0036] Figure 6 This is a plan view of the top plate of the stainless steel component provided in an embodiment of the present invention.

[0037] Figure 7 This is a planar schematic diagram of the base plate of the stainless steel component provided in an embodiment of the present invention.

[0038] Figure 8 yes Figure 5 Elevation view of section AA of the stainless steel component.

[0039] Figure 9 yes Figure 6 Elevation view of the BB section of the stainless steel component.

[0040] Figure 10 This is a schematic diagram of the RPC cover plate provided in an embodiment of the present invention.

[0041] Figure 11 This is a schematic diagram of the installation plane of the stainless steel component provided in an embodiment of the present invention.

[0042] Figure 12 This is a schematic diagram of the stainless steel component installed at a 90° rotation angle according to an embodiment of the present invention.

[0043] The diagram is labeled as follows:

[0044] 1-U-shaped channel, 2-vertical connecting device, 3-RPC cover plate, 4-railing handrail angle steel, 5-railing round steel, 6-railing post, 7-positioning hole, 8-I-shaped steel beam, 9-communication signal cable trough, 10-power cable trough, 11-mortar, 12-positioning nail, 13-T-beam;

[0045] 101 - Lifting hole; 102 - Chamfer on base plate;

[0046] 21-Stainless steel component, 22-Perforated steel pad, 23-Nut;

[0047] 211-Limiting base plate, 212-Screw, 213-Vertical cylinder, 214-Limiting top plate, 215-Top inclined support plate;

[0048] 31- Bolt hole, 32- Rectangular pressure relief groove, 33- Horizontal seam, 34- Longitudinal seam. Detailed Implementation

[0049] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0050] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "longitudinal", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] It should also be noted that although the order of steps is mentioned in the method description, in some cases, steps may be performed in a different order than that described here, and this should not be interpreted as a restriction on the order of steps.

[0053] In a specific implementation, the direction of bridge length is defined as longitudinal or along the bridge direction, the direction perpendicular to it is defined as transverse or across the bridge direction, the direction closer to the bridge is defined as the inner side, and the direction farther from the bridge is defined as the outer side.

[0054] This invention provides a wind-resistant RPC cover plate fixing structure for cable troughs on railway T-beam bridges, applicable to the construction of pedestrian walkways on simply supported T-beam railway bridges. It aims to overcome the technical problems of insufficient wind resistance and easy fatigue deterioration inherent in existing RPC cover plates that rely on mortar grouting for fixation. Through a combination of multiple technical solutions including "mechanical anchoring," "dynamic pressure relief," and "air duct sealing," the wind resistance and long-term durability of the RPC cover plate are fundamentally improved, ensuring railway operational safety.

[0055] Specifically, such as Figure 1-3 The structure includes a U-shaped groove 1, a vertical connecting device 2, and an RPC cover plate 3.

[0056] The U-shaped channel 1 has a bottom plate and vertical sidewalls on both sides, with a U-shaped cross-section. It is a prefabricated structure and is installed on-site by hoisting. The U-shaped channel 1 is hoisted to its position after being fixed to the top of the I-beam 8 on the outside of the T-beam 13. Figure 2 This embodiment includes two longitudinally arranged U-shaped channels 1, namely a communication signal cable channel 9 and a power cable channel 10. Additionally, a positioning pin 12 is welded and fixed to the top of the I-beam 8, and positioning holes 7 corresponding to the positioning pins 12 are pre-drilled on the bottom plate of the U-shaped channel 1. When the U-shaped channel 1 is hoisted to the top of the I-beam 8, the positioning pins 12 are inserted into the positioning holes 7, and mortar 11 is poured into the positioning holes 7 for fixation. Figure 1 The outer side of the U-shaped channel 1 is also provided with railing posts 6, and railing handrail angle steel 4 and railing round steel 5 are installed between the railing posts 6 from top to bottom.

[0057] The bottom plate of the U-shaped groove 1 has a vertically penetrating lifting hole 101, which is strip-shaped and used for subsequent installation of the vertical connecting device 2. For example... Figure 4 In this embodiment, the hoisting hole 101 is an elongated circular hole, which is located near the side wall and offset longitudinally to the left and right, and is offset from the position of the positioning hole 7.

[0058] like Figure 5 The vertical connecting device 2 includes a stainless steel component 21, a perforated steel pad 22, and a nut 23. The stainless steel component 21 is an integrally welded component, including a limiting base plate 211, a screw 212, a vertical cylinder 213, a limiting top plate 214, and a top inclined support plate. The limiting base plate 211 is strip-shaped, its shape matching the lifting hole 101 of the U-shaped groove 1's bottom plate. Its planar dimensions are slightly smaller than the lifting hole 101, allowing the limiting base plate 211 to pass through the lifting hole 101. Figure 7The limiting base plate 211 is also elongated. The bottom end of the screw 212 is fixed to the top surface of the limiting base plate 211 and is perpendicular to the limiting base plate 211. A vertical cylindrical body 213 is provided at the top of the limiting base plate 211. The vertical cylindrical body 213 is cylindrical, and its width (i.e., its diameter) is smaller than the width of the limiting base plate 211. A limiting top plate 214 is provided at the top of the vertical cylindrical body 213, such as... Figure 6 The limiting top plate 214 is partially elongated, and the width of the vertical cylinder 213 is smaller than the width of the limiting top plate 214. The limiting top plate 214 is provided with a through hole for inserting the screw 212.

[0059] like Figure 11 and Figure 12 After the limiting base plate 211 is inserted into the lifting hole 101, it is rotated by the screw 212 until it is perpendicular to the lifting hole 101, so that the limiting base plate 211 is locked under the bottom plate of the U-shaped groove 1. At the same time, the vertical cylinder 213 is inserted into the lifting hole 101, and the limiting top plate 214 is located above the bottom plate of the U-shaped groove 1. When the limiting base plate 211 is rotated to be perpendicular to the lifting hole 101, the limiting top plate 214 also rotates and is locked above the bottom plate of the U-shaped groove 1. The bottom plate of the U-shaped groove 1 has bottom plate chamfers 102 on both sides, and a top inclined support plate 215 is provided on one side of the limiting top plate 214. When the limiting top plate 214 is locked above the bottom plate of the U-shaped groove 1, the top inclined support plate 215 is located above the bottom plate chamfer 102. The top inclined support plate 215 forms a 45° angle with the horizontal plane and is rectangular in shape. The connection between it and the limiting top plate 214 is rounded.

[0060] The height of the vertical cylinder 213 is slightly greater than the thickness of the bottom plate of the U-shaped channel 1, so that when the stainless steel component 21 is installed, the limiting bottom plate 211, the limiting top plate 214 and the top inclined support plate 215 can be snapped onto the bottom plate of the U-shaped channel 1 or the bottom plate chamfer 102.

[0061] The RPC cover plate 3 is provided with bolt holes 31. After the RPC cover plate 3 covers the top of the U-shaped groove 1, the screw 212 is inserted upward into the bolt holes 31 of the RPC cover plate 3 and fixed. Specifically, the top of the screw 212 has external threads. After the screw 212 is inserted upward into the bolt holes 31 of the RPC cover plate 3, the perforated steel pad 22 is installed and fixed by the nut 23.

[0062] This invention provides specific structural optimizations to the RPC cover plate 3. Firstly, a bolt hole 31 is pre-drilled above the center of the lifting hole 101 corresponding to the U-shaped groove 1. The diameter of this bolt hole 31 is slightly larger than the diameter of the screw 212, providing a channel for the screw 212 and accommodating construction and installation errors. Furthermore, as... Figure 10The RPC cover plate 3 is equipped with a dynamic pressure relief structure, which features a vertically penetrating rectangular pressure relief slot 32 arranged horizontally on the RPC cover plate 3. The right angles of the slot are chamfered to reduce stress concentration. After the RPC cover plate 3 is installed, this rectangular pressure relief slot 32, together with the U-shaped groove 1, forms a pressure relief channel. Furthermore, the joints of the RPC cover plate 3 are sealed with grout, including longitudinal joints 34 and transverse joints 33.

[0063] The installation method of this invention mainly includes the following steps:

[0064] 1) U-shaped groove positioning and installation:

[0065] The U-shaped channel 1 is hoisted into place, aligning the positioning hole 7 on its bottom plate with the positioning nail 12 on the I-beam crossbeam 8, and mortar 11 is poured into the positioning hole 7 to fix it in place.

[0066] 2) Installation of stainless steel components and sealing of holes:

[0067] With the limiting base plate 211 of the stainless steel component 21 facing downwards, it extends into the lifting hole 101 from above the U-shaped groove 1. Since the lateral dimensions of the limiting top plate 214 and the top inclined support plate 215 are larger than the lifting hole 101, the component is reliably suspended, effectively preventing the risk of falling during installation. Subsequently, the stainless steel component 21 is rotated 90° so that its limiting top plate 214 and the top inclined support plate 215 are tightly fitted against the top surface and chamfered portion of the bottom plate of the U-shaped groove 1. At this point, the limiting base plate 211 is fitted against the bottom surface of the bottom plate of the U-shaped groove 1. In this state, the vertical cylinder 213 of the stainless steel component 21 and the limiting base plate 211 effectively block most of the space in the lifting hole 101, while the unblocked semi-circular areas at both ends of the lifting hole 101 are retained as drainage channels.

[0068] 3) RPC cover plate fixing and pressure relief channel formation:

[0069] Align the bolt holes 31 of the RPC cover plate 3 with the screw 212 and lower it into place. At this time, the pre-set rectangular pressure relief groove 32 at the end of the RPC cover plate 3 communicates with the internal cavity of the U-shaped groove below the RPC cover plate 3, together forming a complete pressure relief channel for balancing the wind pressure on the upper and lower surfaces of the RPC cover plate 3. Then, insert the perforated steel pad 22 in sequence and tighten the nut 23 to firmly anchor the RPC cover plate 3 onto the U-shaped groove 1.

[0070] 4) Joint treatment:

[0071] Finally, the longitudinal joint 34 and transverse joint 33 between adjacent RPC cover plates 3 are sealed with mortar.

[0072] The structure of this invention has the following technical advantages:

[0073] 1) Triple protection to eliminate the risk of tipping over:

[0074] This invention innovatively constructs a triple protection system of "dynamic pressure relief - air duct sealing - mechanical anchoring". The rectangular pressure relief slot 32 can significantly reduce aerodynamic lift, the stainless steel component 21 blocks the path of strong wind entering the U-shaped channel and impacting the bottom of the cover plate, and the mechanical anchoring provided by the bolts eliminates the possibility of the cover plate being completely overturned from a physical mechanism.

[0075] 2) Effectively curb long-term fatigue damage:

[0076] The effective sealing of the lifting hole 101 by the stainless steel component 21 and the pre-set rectangular pressure relief slot 32 of the RPC cover plate 3 significantly reduce the repeated pulse impacts on the RPC cover plate 3 and the grouting mortar caused by train wind and natural wind, greatly delaying the fatigue deterioration process of the materials, thereby improving the reliability and durability of the entire fixing system in long-term operation.

[0077] 3) Ensure coordinated design of drainage and duct sealing:

[0078] The design of stainless steel component 21 achieves the effect of "blocking airflow without blocking waterflow". While blocking most of the lifting holes 101 to prevent airflow, it retains some semi-circular areas at both ends of the lifting holes 101 as drainage channels, ensuring that the drainage function of the cable trough is not affected, reflecting the optimal design of functional integration.

[0079] 4) Convenient and safe construction, with fall protection design:

[0080] Stainless steel component 21 can be prefabricated in the factory, ensuring quality control. Its unique rotating snap-fit ​​design naturally forms an anti-fall mechanism during installation, effectively avoiding the risk of small components accidentally falling during high-altitude operations on the bridge deck. The slightly larger bolt holes pre-drilled on the RPC cover plate 3 provide necessary construction tolerance, making installation alignment more convenient.

[0081] 5) Highly compatible with existing standards:

[0082] The fixing structure of this invention is designed for standard U-shaped channels and RPC covers in general reference drawings such as "Tongqiao (2017) 2101 and Tongqiao (2017) 2201". Its core innovation lies in the introduction of a vertical connecting device 2 and the opening of bolt holes 31 and rectangular pressure relief slots 32 on the RPC cover 3, without changing the main structure and size of the existing U-shaped channel 1 and RPC cover 3. This makes the technical solution applicable to both new construction projects and particularly suitable for low-cost and high-efficiency reinforcement and renovation of existing lines, with extremely high engineering application value and promotion prospects.

[0083] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. A wind-resistant railway T-beam bridge cable trough RPC cover plate fixing structure, characterized in that: The structure includes a U-shaped groove (1), a vertical connecting device (2), and an RPC cover plate (3); The bottom plate of the U-shaped groove (1) is provided with a vertically penetrating hoisting hole (101), which is strip-shaped; The vertical connecting device (2) includes a limiting base plate (211) and a screw (212). The limiting base plate (211) is strip-shaped, and the bottom end of the screw (212) is fixed to the top surface of the limiting base plate (211) and is perpendicular to the limiting base plate (211). After the limiting base plate (211) is inserted into the lifting hole (101), it is rotated to be perpendicular to the lifting hole (101), so that the limiting base plate (211) is stuck under the bottom plate of the U-shaped groove (1); The RPC cover plate (3) is provided with bolt holes (31). After the RPC cover plate (3) covers the top of the U-shaped groove (1), the screw (212) is inserted upward into the bolt holes (31) of the RPC cover plate (3) and fixed.

2. The wind-resistant railway T-beam bridge cable trough RPC cover fixing structure according to claim 1, characterized in that: The top of the limiting base plate (211) is provided with a vertical cylinder (213), the width of which is smaller than the width of the limiting base plate (211); After the limiting base plate (211) is inserted into the hoisting hole (101), the vertical cylinder (213) is inserted into the hoisting hole (101).

3. The wind-resistant railway T-beam bridge cable trough RPC cover fixing structure according to claim 2, characterized in that: The top of the vertical cylinder (213) is provided with a limiting top plate (214), the width of the vertical cylinder (213) is smaller than the width of the limiting top plate (214), and the limiting top plate (214) is provided with a through hole for inserting the screw (212); After the limiting bottom plate (211) is inserted into the lifting hole (101), the limiting top plate (214) is located above the bottom plate of the U-shaped groove (1). When the limiting bottom plate (211) is rotated to be perpendicular to the lifting hole (101), the limiting top plate (214) also rotates and is stuck above the bottom plate of the U-shaped groove (1).

4. The wind-resistant railway T-beam bridge cable trough RPC cover fixing structure according to claim 3, characterized in that: The bottom plate of the U-shaped groove (1) has bottom plate chamfers (102) on both sides, and the top plate (214) of the limiting plate (214) is provided with a top inclined support plate (215) on one side. When the limiting top plate (214) is locked above the bottom plate of the U-shaped groove (1), the top inclined support plate (215) is located above the chamfer (102) of the bottom plate.

5. The wind-resistant railway T-beam bridge cable trough RPC cover plate fixing structure according to claim 4, characterized in that: The top of the screw (212) has an external thread. After the screw (212) is inserted upward into the bolt hole (31) of the RPC cover plate (3), the perforated steel pad (22) is installed and fixed by the nut (23).

6. The wind-resistant railway T-beam bridge cable trough RPC cover fixing structure according to claim 5, characterized in that: The RPC cover plate (3) is provided with a vertically penetrating rectangular pressure relief slot (32), which is arranged horizontally on the RPC cover plate (3).

7. The wind-resistant railway T-beam bridge cable trough RPC cover fixing structure according to claim 6, characterized in that: The joints of the RPC cover plate (3) are sealed with grout.

8. The wind-resistant railway T-beam bridge cable trough RPC cover fixing structure according to claim 7, characterized in that: The U-shaped groove (1) is located on the top of the I-beam (8) fixed outside the T-beam (13), and a railing post (6) is provided on the outside of the U-shaped groove (1).

9. The wind-resistant railway T-beam bridge cable trough RPC cover fixing structure according to claim 8, characterized in that: The top of the I-beam (8) is fixed with a positioning nail (12), and the bottom plate of the U-shaped groove (1) is provided with a positioning hole (7) corresponding to the positioning nail (12). When the U-shaped groove (1) is placed on top of the I-beam (8), the positioning pin (12) is inserted into the positioning hole (7).

10. The wind-resistant railway T-beam bridge cable trough RPC cover fixing structure according to claim 9, characterized in that: The positioning hole (7) is filled with mortar (11).

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