Railway bridge telescopic water guide device and mounting method thereof

Abstract

The invention belongs to the technical field of bridge telescopic water guide, and particularly relates to a railroad bridge telescopic water guide device and an installation method thereof. Two adjacent bridge bodies are provided with profile steel, one side of the profile steel is fixedly connected to the bridge bodies through anchoring assemblies, the other side of the profile steel is provided with a storage groove and a clamping groove in the length direction, and a stainless steel water guide plate is arranged between the two profile steel; the two sides of the stainless steel water guide plate are clamped in the clamping grooves in the two pieces of profile steel respectively, and stainless steel water guide plate pressing strips pressed on the stainless steel water guide plate are arranged in the clamping grooves; elastic plugs mounted in the storage grooves and the clamping grooves are arranged at the two ends of the section steel in the length direction, and drainage pipe assemblies are mounted on the section steel or the elastic plugs and communicate with the storage grooves; a dustproof cover plate is further arranged above the two pieces of profile steel and fixedly connected with the profile steel. The elastic plug prevents water from leaking out through the two ends of the storage tank and the two ends of the clamping groove, the drainage pipe assembly is assembled on the section steel or the elastic plug, and it can be guaranteed that water in the storage tank can be effectively drained in time.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge expansion water drainage, and particularly relates to a railway bridge expansion water drainage device and an installation method thereof. Background Art

[0002] In order to adapt to the deformation of the beam body due to forces, temperature, etc., a gap for the beam body to expand and contract must be left between the beam bodies. An expansion device is arranged at the gap where the beam body expands and contracts, which can prevent water leakage from the gap where the beam body expands and contracts, and corrosion and pollution of the beam (pier) body, bearings, inspection facilities, etc.

[0003] The expansion devices widely used in railway bridges at present can all meet the daily use requirements, but a common weakness is that they are difficult to overhaul and maintain. The service life of the waterproof sealing tape in the expansion device is short, and it is easy to fall off, be damaged and aged, resulting in water leakage and unable to achieve the expected protection effect; once water leaks, it will damage the expansion device and the beam body. In this case, it is necessary to demolish and replace the track components for overhaul and replacement, which is difficult to construct and affects normal train operation.

[0004] Therefore, it is particularly important to develop an expansion water drainage device that is not easily damaged, easy to install, easy to replace, easy to maintain, easy to drain, and has a long service life. Summary of the Invention

[0005] In order to solve the problems of difficult replacement, difficult installation, long maintenance time, difficult drainage, easy occupation of the water drainage channel by sundries, short service life, etc. of railway bridges, the purpose of the present invention is to provide a railway bridge expansion water drainage device and an installation method thereof.

[0006] The purpose of the present invention is achieved by the following technical solutions:

[0007] The expansion water drainage device of the present invention includes profiled steel, a stainless steel water drainage plate, a stainless steel water drainage plate pressing strip and an anchoring component. Profiled steel is provided on adjacent two bridge bodies. One side of the profiled steel is fixedly connected to the bridge body through the anchoring component. The other side of the profiled steel is respectively provided with a storage groove and a clamping groove along the length direction. A stainless steel water drainage plate is arranged between the profiled steels on adjacent two bridge bodies. Both sides of the stainless steel water drainage plate are respectively clamped in the clamping grooves on the two profiled steels. A stainless steel water drainage plate pressing strip that presses on the stainless steel water drainage plate to prevent the stainless steel water drainage plate from separating from the profiled steel during expansion and contraction is arranged in the clamping groove; elastic plugs are arranged at both ends of the profiled steel in the length direction, and the elastic plugs are installed in the storage groove and the clamping groove; a drain pipe assembly is installed on the profiled steel or the elastic plug, and the drain pipe assembly is communicated with the storage groove for draining the water in the storage groove; a dust-proof cover plate is further arranged above the profiled steels on adjacent two bridge bodies, and the dust-proof cover plate is fixedly connected to the profiled steel.

[0008] Wherein: the drain pipe assembly includes a drain pipe and a drain pipe hoop, the drain pipe is inserted into the elastic plug and communicates with the storage tank; or the section steel has an opening, and the drain pipe is installed at the opening of the section steel through the drain pipe hoop and communicates with the storage tank.

[0009] The opening on the section steel is provided on the side or bottom surface of the section steel.

[0010] The drain pipe assembly is located above the bridge deck concrete protective layer of the bridge body, or part of the drain pipe assembly penetrates into the bridge deck concrete protective layer of the bridge body, or the drain pipe assembly is located in the bridge deck concrete protective layer of the bridge body; when the drain pipe assembly is located in the bridge deck concrete protective layer of the bridge body, a check valve that can only drain water to the outside of the section steel is provided in the drain pipe.

[0011] The card slot has a structure with a higher outer side and a lower inner side, that is, the height of the card slot on the side away from the storage tank is higher than the height on the side close to the storage tank, and a retaining platform for clamping the stainless steel water guide plate is provided on the side of the card slot close to the storage tank.

[0012] A T-shaped groove is provided along the length direction on one side of the section steel, the anchoring assembly is a T-shaped bolt, and one end of the T-shaped head of the T-shaped bolt slides in the T-shaped groove and is fixedly connected to the steel bars buried in the bridge body after sliding in place.

[0013] The length of the dust-proof cover plate is greater than or equal to the length of the storage tank and the card slot.

[0014] The installation method of the expansion water guide device for railway bridges of the present invention is as follows: after the section steel is positioned on the bridge body through the anchoring assembly, the elastic plug and the drain pipe assembly are installed before pouring the bridge deck concrete protective layer. Elastic plugs are pressed into both ends of the storage tank and the card slot of the section steel in the length direction to seal the storage tank and the card slot. The drain pipe assembly is installed on the section steel or the elastic plug and communicates with the storage tank, and then the drain pipe assembly is connected to the anti-water drainage system of the beam body, and then the bridge deck concrete protective layer is poured; both sides of the stainless steel water guide plate are respectively inserted and embedded in the card slots of the section steel on adjacent bridge bodies, and are compacted with the stainless steel water guide plate pressing strip; finally, a dust-proof cover plate is installed above the section steel.

[0015] Wherein: the relative position between the drain pipe assembly and the bridge body is divided into three cases, which are respectively:

[0016] A. The drain pipe assembly is above the bridge deck concrete protective layer: the water retaining platform on the bridge body has sufficient height, and the section steel is included in the water retaining platform of the bridge body. In this case, the drain pipe assembly is above the bridge deck concrete protective layer, and sewage flows into the storage tank through the stainless steel water guide plate, and then is directly discharged into the upper part of the bridge deck concrete protective layer through the drain pipe assembly and discharged under the bridge through the anti-water drainage system of the beam body;

[0017] B. Part of the drain pipe assembly intrudes into the bridge deck concrete protective layer: The water retaining platform on the bridge body does not have enough height, and a small part of the profiled steel intrudes into the bridge deck concrete protective layer. In this case, a part of the drain pipe assembly intrudes into the bridge deck concrete protective layer, and the other part of the drain pipe assembly is inside the water retaining platform; according to the specific position of the drain pipe assembly, a groove is opened on the bridge body, and the drain pipe assembly is connected to the beam body waterproof and drainage system through the groove to ensure that sewage can be smoothly discharged under the bridge; when the groove changes direction, it can be a right angle, an acute angle or an obtuse angle;

[0018] C. The drain pipe assembly is located in the bridge deck concrete protective layer of the bridge body: The water retaining platform on the bridge body does not have enough height, and most of the profiled steel intrudes into the bridge deck concrete protective layer. In this case, the entire drain pipe assembly is located in the bridge deck concrete protective layer of the bridge body, and a check valve for preventing the bridge deck sewage from flowing back into the expansion water guiding device is arranged inside the drain pipe assembly. First, connect the drain pipe assembly to the beam body waterproof and drainage system, and then carry out the paving operation of the bridge deck concrete protective layer; or when carrying out the paving operation of the bridge deck concrete protective layer, leave the corresponding pipeline position empty, and after the drain pipe assembly is connected to the beam body waterproof and drainage system, then carry out the supplementary paving operation of the bridge deck concrete protective layer.

[0019] Sealant is applied at the contact points of the elastic plug with the storage tank and the clamping groove for waterproof treatment; the drain pipe assembly includes a drain pipe and a drain pipe hoop. The drain pipe is assembled on site with the profiled steel or the elastic plug. When the drain pipe is assembled on site with the profiled steel, the drain pipe is fixed on the profiled steel by heating the drain pipe; the drain pipe on the outside of the profiled steel is tightened with a drain pipe hoop, and glue is applied at the tightened part for fixation to ensure that the drain pipe is firmly fixed to the profiled steel.

[0020] The advantages and positive effects of the present invention are as follows:

[0021] 1. Elastic plugs are provided at both ends of the storage tank and the clamping groove of the profiled steel in the present invention to prevent water from leaking out through both ends of the storage tank and the clamping groove; a drain pipe assembly is assembled on the profiled steel or the elastic plug in the present invention, which can ensure that the water in the storage tank can be discharged in a timely and effective manner.

[0022] 2. A dust-proof cover plate is provided above the profiled steel in the present invention, which can ensure that dust and sundries do not invade the expansion water guiding device body and hinder water guiding and drainage.

[0023] 3. The water guiding plate and the water guiding plate pressing strip in the present invention are both made of stainless steel, which greatly increases the service life of the expansion water guiding device, solves the problems of easy aging and weathering of the rubber strip during use, and prolongs the service life of the expansion water guiding device.

[0024] 4. The clamping groove for inserting the stainless - steel water guide plate in the present invention has a structure with a higher outer side and a lower inner side, enabling rainwater to flow into the storage tank in a timely manner without being stored on the stainless - steel water guide plate, preventing corrosion of the stainless - steel water guide plate, increasing the service life of the telescopic water - guiding device, and reducing the maintenance frequency.

[0025] 5. When the stainless - steel water guide plate needs to be replaced in the present invention, only the dust - proof cover plate and the stainless - steel water guide plate pressing strip need to be removed, and then the stainless - steel water guide plate can be pulled out and replaced with a new one. After replacement, install the stainless - steel water guide plate pressing strip and the dust - proof cover plate, and the operation is simple and convenient.

[0026] 6. The present invention has a T - shaped groove structure on the section steel, making it easy to install. Place the section steel at the set position where it can overlap with the embedded steel bars, install the anchoring component, put the anchoring component into the T - shaped groove and tighten it to fix the position. After firmly connecting the anchoring component with the embedded steel bars, pour concrete. The operation is simple and convenient, and it can more efficiently connect the anchoring component with the embedded steel bars, avoiding post - installed rebar. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the main view of the structure of the telescopic water - guiding device of the present invention;

[0028] Figure 2 is Figure 1 the top view of

[0029] Figure 3 is Figure 1 the end view of the section steel in

[0030] Figure 4 is the usage state diagram of the telescopic water - guiding device of the present invention;

[0031] Figure 5 is Figure 1 the partial enlarged view at A in

[0032] Figure 6A is one of the schematic diagrams of the opening shape structure on the section steel of the present invention;

[0033] Figure 6B is another schematic diagram of the opening shape structure on the section steel of the present invention;

[0034] Figure 6C is the third schematic diagram of the opening shape structure on the section steel of the present invention;

[0035] Figure 7A is the schematic diagram of the structure of the drainage pipe assembly in the telescopic water - guiding device of the present invention located above the concrete layer of the bridge body;

[0036] Figure 7B is the schematic diagram of the structure of the drainage pipe assembly in the telescopic water - guiding device of the present invention invading the concrete layer of the bridge body;

[0037] Figure 7C This is a schematic structural view of the drain pipe assembly in the telescopic water guide device of the present invention located in the concrete layer of the bridge body;

[0038] Figure 8A This is one of the top views of the drain pipe assembly in the telescopic water guide device of the present invention invading the concrete layer of the bridge body and being connected to the beam body waterproof and drainage system through the communication groove;

[0039] Figure 8B This is another top view of the drain pipe assembly in the telescopic water guide device of the present invention invading the concrete layer of the bridge body and being connected to the beam body waterproof and drainage system through the communication groove;

[0040] Figure 9A This is one of the top views of the drain pipe assembly in the telescopic water guide device of the present invention located in the concrete layer of the bridge body and being connected to the beam body waterproof and drainage system through the communication groove;

[0041] Figure 9B This is another top view of the drain pipe assembly in the telescopic water guide device of the present invention located in the concrete layer of the bridge body and being connected to the beam body waterproof and drainage system through the communication groove;

[0042] Wherein: 1 is a steel section, 2 is a stainless steel water guide plate, 3 is a stainless steel water guide plate pressing strip, 4 is an anchoring component, 5 is an elastic plug, 6 is a drain pipe assembly, 7 is a connecting bolt, 8 is a dust-proof cover plate, 9 is a storage tank, 10 is a clamping groove, 11 is a T-shaped groove, 12 is a water retaining platform, 13 is a bridge body, 14 is a bridge deck concrete protective layer, 15 is a retaining platform, 16 is a beam body waterproof and drainage system, 17 is a groove, 18 is a drain pipe, 19 is a drain pipe hoop, 20 is a check valve. Detailed implementation manners

[0043] The present invention will be further described in detail below with reference to the accompanying drawings.

[0044] As Figures 1-5As shown in the figure, the telescopic water guiding device of the present invention includes a section steel 1, a stainless steel water guiding plate 2, a stainless steel water guiding plate pressing strip 3, an anchoring assembly 4, an elastic plug 5, a drain pipe assembly 6 and a dust-proof cover plate 8. Section steels 1 are provided on adjacent bridge bodies 13. One side of the section steel 1 is fixedly connected to the bridge body 13 through the anchoring assembly 4. A T-shaped groove 11 is provided along the length direction on one side of the section steel 1. The anchoring assembly 4 is a T-shaped bolt. One end of the T-shaped head of the T-shaped bolt slides in the T-shaped groove 11 and is fixedly connected to the steel bars embedded in the bridge body 13 after sliding in place. Storage grooves 9 and clamping grooves 10 are respectively provided along the length direction on the other side of the section steel 1. A stainless steel water guiding plate 2 is provided between the section steels 1 on adjacent bridge bodies 13. Both sides of the stainless steel water guiding plate 2 are respectively clamped in the clamping grooves 10 on the two section steels 1. A stainless steel water guiding plate pressing strip 3 that presses on the stainless steel water guiding plate 2 to prevent the stainless steel water guiding plate 2 from separating from the section steel 1 during expansion and contraction is provided in the clamping groove 10; elastic plugs 5 are provided at both ends of the section steel 1 in the length direction. The elastic plugs 5 are installed in the storage grooves 9 and the clamping grooves 10 to prevent water from leaking out through both ends of the storage grooves 9 and the clamping grooves 10; a drain pipe assembly 6 is installed on the section steel 1 or the elastic plug 5. The drain pipe assembly 6 is communicated with the storage groove 9 and is used to drain the water in the storage groove 9; a dust-proof cover plate 8 is further provided above the section steels 1 on adjacent bridge bodies 13. The dust-proof cover plate 8 is fixedly connected to the section steel 1.

[0045] In this embodiment, the storage groove 9 and the clamping groove 10 are two parallel grooves located at the lower part of the section steel 1. The storage groove 9 is located outside the clamping groove 10. The clamping groove 10 in this embodiment has a structure with a higher outer side and a lower inner side, that is, the height of the side of the clamping groove 10 far from the storage groove 9 is higher than the height of the side close to the storage groove 9. A retaining platform 15 is provided on the side of the clamping groove 10 close to the storage groove 9, which can clamp the stainless steel water guiding plate 2 to prevent the stainless steel water guiding plate 2 from separating from the clamping groove 10. The storage groove 9 is used for water guiding to drain rainwater and the like infiltrated from the beam top through the drain pipe assembly 6. The stainless steel water guiding plate 2 in this embodiment is arc-shaped, and the edges on both sides are bent upward. The stainless steel water guiding plate 2 can be clamped in the clamping groove 10 during the expansion and contraction process, and the upwardly bent part abuts against the retaining platform 15 and is not easily pulled out.

[0046] The stainless steel water guiding plate pressing strip 3 in this embodiment is a cylinder and presses on the bent part of the stainless steel water guiding plate 2.

[0047] The drain pipe assembly 6 in this embodiment includes a drain pipe 18 and a drain pipe hoop 19. The drain pipe 18 is inserted on the elastic plug 5 and is communicated with the storage groove 9; or an opening is provided on the section steel 1, and the drain pipe 18 is installed at the opening of the section steel 1 through the drain pipe hoop 19 and is communicated with the storage groove 9. The opening on the section steel 1 can be provided on the side surface or the bottom surface of the section steel 1, and the shape of the opening can be rectangular (as shown in Figure 6A ), oval (as shown in Figure 6B ), or kidney-shaped (as shown in Figure 6C ). The drain pipe 18 and the drain pipe hoop 19 in this embodiment can be made of plastic or stainless steel. AsFigure 7A As shown, the drain pipe assembly 6 is located above the deck concrete protective layer 14 of the bridge body 13; or as Figure 7B shown, part of the drain pipe assembly 6 intrudes into the deck concrete protective layer 14 of the bridge body 13; or as Figure 7C shown, the drain pipe assembly 6 is located in the deck concrete protective layer 14 of the bridge body 13. When the drain pipe assembly 6 is located in the deck concrete protective layer 14 of the bridge body 13, a check valve 20 that can only drain water to the outside of the profiled steel 1 is provided in the drain pipe 18.

[0048] The dust-proof cover plate 8 of this embodiment is connected to the profiled steel 1 through connecting bolts 7. One end of the connecting bolt 7 is connected to the dust-proof cover plate 8, and the other end of the connecting bolt 7 is a T-shaped head, which is connected to the T-shaped groove 11 on the profiled steel 1; the length of the dust-proof cover plate 8 is greater than or equal to the lengths of the storage groove 9 and the card slot 10. The dust-proof cover plate 8 of this embodiment can be a zinc-magnesium aluminum plate.

[0049] The installation method of the expansion water guiding device for railway bridges of the present invention is as follows:

[0050] After the profiled steel 1 is positioned on the bridge body 13 through the anchoring assembly 4, the elastic plug 5 and the drain pipe assembly 6 are installed before pouring the deck concrete protective layer 14; the elastic plug 5 is made into a corresponding shape according to the storage groove 9 and the card slot 10 to ensure that the elastic plug 5 is in close contact with the profiled steel 1. The elastic plug 5 is pressed into both ends of the storage groove 9 and the card slot 10 of the profiled steel 1 in the length direction to block the storage groove 9 and the card slot 10. The setting of the elastic plug 5 can block both the storage groove 9 and the card slot 10; sealant is applied at the contact between the elastic plug 5 and the storage groove 9 and the card slot 10 for waterproof treatment. The drain pipe assembly 6 is installed on the profiled steel 1 or the elastic plug 5 and communicated with the storage groove 9; the drain pipe assembly 6 includes a drain pipe 18 and a drain pipe hoop 19. Taking the connection between the drain pipe 18 and the profiled steel 1 as an example, the drain pipe 18 is assembled with the profiled steel 1 on site. After the drain pipe 18 extends into the opening on the profiled steel 1, the drain pipe 18 is fixed on the profiled steel 1 by heating the drain pipe 18; the drain pipe 18 outside the profiled steel 1 is tightened with a drain pipe hoop 19, and glue is applied at the tightened part for fixation to ensure that the drain pipe 18 is firmly fixed to the profiled steel 1. Then the drain pipe assembly 6 is connected to the beam body waterproof and drainage system 16. The drain pipe 18 can be bent and spliced according to the on-site working conditions to ensure connection with the beam body waterproof and drainage system 16. The splicing part can be a right angle (such as Figure 8A 、 Figure 9A shown), or a non-right angle (such as Figure 8B 、 Figure 9B shown); then the deck concrete protective layer 14 is poured. The two sides of the stainless steel water guiding plate 2 are respectively inserted into the card slots 10 of the profiled steel 1 on two adjacent bridge bodies 13 and compacted with the stainless steel water guiding plate pressing strip 3; finally, the dust-proof cover plate 8 is installed above the profiled steel 1.

[0051] The relative positions of the drain pipe assembly 6 and the bridge body 13 are divided into three cases, which are respectively

[0052] A. The drain pipe assembly 6 is above the bridge deck concrete protective layer 14: The water retaining platform 12 on the bridge body 13 has sufficient height, and the profiled steel 1 is included in the water retaining platform 12 of the bridge body 13. In this case, the drain pipe assembly 6 is above the bridge deck concrete protective layer 14, and the sewage flows into the storage tank 9 through the stainless steel water guide plate 2, and then is directly discharged above the bridge deck concrete protective layer 14 through the drain pipe assembly 6 and discharged under the bridge through the beam body waterproof and drainage system 16.

[0053] B. Part of the drain pipe assembly 6 intrudes into the bridge deck concrete protective layer 14: The water retaining platform 12 on the bridge body 13 does not have sufficient height, and a small part of the profiled steel 1 intrudes into the bridge deck concrete protective layer 14. In this case, a part of the drain pipe 18 intrudes into the bridge deck concrete protective layer 14, and the other part of the drain pipe 18 is in the water retaining platform 12; according to the specific position of the drain pipe assembly 6, a groove 17 is opened on the bridge body 13 to connect the drain pipe assembly 6 and the beam body waterproof and drainage system 16 through the groove 17 to ensure that the sewage can be smoothly discharged under the bridge; when the groove 17 changes direction, it can be either a right angle or a non-right angle (i.e., an acute angle or an obtuse angle).

[0054] C. The drain pipe assembly 6 is located in the bridge deck concrete protective layer 14 of the bridge body 13: The water retaining platform 12 on the bridge body 13 does not have sufficient height, and most of the profiled steel 1 intrudes into the bridge deck concrete protective layer 14. In this case, the drain pipe 18 is entirely located in the bridge deck concrete protective layer 14 of the bridge body 13, and a check valve 20 for preventing the bridge deck sewage from flowing back into the expansion water guide device is provided in the drain pipe assembly 6. First, connect the drain pipe assembly 6 and the beam body waterproof and drainage system 16 together, and then carry out the paving operation of the bridge deck concrete protective layer 14; or when carrying out the paving operation of the bridge deck concrete protective layer 14, leave the corresponding pipeline position empty, and after connecting the drain pipe assembly 6 and the beam body waterproof and drainage system 16, then carry out the supplementary paving operation of the bridge deck concrete protective layer 14. It should be noted in this case that during the paving of the bridge deck concrete protective layer 14, the protection of the drain pipe assembly 6 should be paid attention to. When laying the drain pipe 18, the slope of the drain pipe 18 should be the same as that of the bridge body 13 to ensure that the sewage can be smoothly discharged.

Claims

1. A railway bridge expansion water guiding device, comprising a profiled steel (1), a stainless steel water guiding plate (2), a stainless steel water guiding plate pressing strip (3) and an anchoring assembly (4). Profiled steels (1) are provided on adjacent two bridge bodies (13). One side of the profiled steel (1) is fixedly connected to the bridge body (13) through the anchoring assembly (4). On the other side of the profiled steel (1), a storage groove (9) and a clamping groove (10) are respectively formed along the length direction. A stainless steel water guiding plate (2) is provided between the profiled steels (1) on adjacent two bridge bodies (13). Two sides of the stainless steel water guiding plate (2) are respectively clamped in the clamping grooves (10) on the two profiled steels (1). A stainless steel water guiding plate pressing strip (3) which presses on the stainless steel water guiding plate (2) and prevents the stainless steel water guiding plate (2) from separating from the profiled steel (1) during expansion and contraction is arranged in the clamping groove (10); It is characterized in that: Elastic plugs (5) are provided at both ends of the steel section (1) in the length direction. The elastic plugs (5) are installed in the storage tank (9) and the card slot (10). A drain pipe assembly (6) is installed on the steel section (1) or the elastic plug (5). The drain pipe assembly (6) is communicated with the storage tank (9) and is used to drain the water in the storage tank (9). A dust-proof cover plate (8) is further provided above the steel sections (1) on two adjacent bridge bodies (13). The dust-proof cover plate (8) is fixedly connected to the steel section (1).

2. The expansion water guide device for railway bridges according to claim 1, characterized in that: The drain pipe assembly (6) includes a drain pipe (18) and a drain pipe hoop (19). The drain pipe (18) is inserted on the elastic plug (5) and is communicated with the storage tank (9); or an opening is provided on the steel section (1), and the drain pipe (18) is installed at the opening of the steel section (1) through the drain pipe hoop (19) and is communicated with the storage tank (9).

3. The railway bridge expansion water guiding device according to claim 2, characterized in that: The opening on the steel section (1) is provided on the side or bottom surface of the steel section (1).

4. The railway bridge expansion water guiding device according to claim 2, wherein: The drain pipe assembly (6) is located above the bridge deck concrete protection layer (14) of the bridge body (13), or part of the drain pipe assembly (6) penetrates into the bridge deck concrete protection layer (14) of the bridge body (13), or the drain pipe assembly (6) is located in the bridge deck concrete protection layer (14) of the bridge body (13); when the drain pipe assembly (6) is located in the bridge deck concrete protection layer (14) of the bridge body (13), a check valve (20) that can only drain water to the outside of the steel section (1) is provided in the drain pipe (18).

5. The expansion water guide device for railway bridges according to claim 1, characterized in that: The card slot (10) has a structure with a higher outer side and a lower inner side, that is, the height of the card slot (10) on the side away from the storage tank (9) is higher than the height on the side close to the storage tank (9). A retaining platform (15) for clamping the stainless steel water guide plate (2) is provided on the side of the card slot (10) close to the storage tank (9).

6. The expansion water guide device for railway bridges according to claim 1, characterized in that: A T-shaped groove (11) is provided along the length direction on one side of the steel section (1). The anchoring assembly (4) is a T-shaped bolt. One end of the T-shaped head of the T-shaped bolt slides in the T-shaped groove (11) and is fixedly connected to the steel bars embedded in the bridge body (13) after sliding in place.

7. The expansion water guiding device for railway bridges according to claim 1, characterized in that: The length of the dust-proof cover plate (8) is greater than or equal to the lengths of the storage tank (9) and the card slot (10).

8. The installation method of the railway bridge expansion water guiding device according to any one of claims 1 to 7, characterized in that: After the steel section (1) is positioned on the bridge body (13) through the anchoring assembly (4), before pouring the bridge deck concrete protective layer (14), the elastic plug (5) and the drain pipe assembly (6) are installed. Elastic plugs (5) are pressed into both ends of the storage tank (9) and the clamping groove (10) of the steel section (1) in the length direction to seal the storage tank (9) and the clamping groove (10). The drain pipe assembly (6) is installed on the steel section (1) or the elastic plug (5) and communicated with the storage tank (9). Then, the drain pipe assembly (6) is connected to the beam body waterproof and drainage system (16), and then the bridge deck concrete protective layer (14) is poured; both sides of the stainless steel water guide plate (2) are respectively inserted into the clamping grooves (10) of the steel sections (1) on two adjacent bridge bodies (13), and are compacted with the stainless steel water guide plate pressing strip (3); finally, a dust-proof cover plate (8) is installed above the steel section (1).

9. The installation method according to claim 8, characterized in that: The relative positions of the drain pipe assembly (6) and the bridge body (13) are divided into three cases, which are respectively A. The drain pipe assembly (6) is above the bridge deck concrete protective layer (14): The water retaining platform (12) on the bridge body (13) has sufficient height, and the steel section (1) is included in the water retaining platform (12) of the bridge body (13). In this case, the drain pipe assembly (6) is above the bridge deck concrete protective layer (14), and sewage flows into the storage tank (9) through the stainless steel water guide plate (2), and then is directly discharged into the upper part of the bridge deck concrete protective layer (14) through the drain pipe assembly (6) and is discharged under the bridge through the beam body waterproof and drainage system (16); B. The drain pipe assembly (6) partially penetrates into the bridge deck concrete protective layer (14): The water retaining platform (12) on the bridge body (13) does not have sufficient height, and a small part of the steel section (1) penetrates into the bridge deck concrete protective layer (14). In this case, a part of the drain pipe assembly (6) penetrates into the bridge deck concrete protective layer (14), and the other part of the drain pipe assembly (6) is in the water retaining platform (12); according to the specific position of the drain pipe assembly (6), a groove (17) is opened on the bridge body (13), and the drain pipe assembly (6) is connected to the beam body waterproof and drainage system (16) through the groove (17) to ensure that sewage can be smoothly discharged under the bridge; when the groove (17) changes direction, it can be a right angle, an acute angle or an obtuse angle; C. The drain pipe assembly (6) is located in the deck concrete protective layer (14) of the bridge body (13): the water retaining platform (12) on the bridge body (13) does not have sufficient height, and most of the profiled steel (1) intrudes into the deck concrete protective layer (14). In this case, the entire drain pipe assembly (6) is located in the deck concrete protective layer (14) of the bridge body (13). A check valve (20) for preventing the backflow of deck sewage into the expansion water guiding device is provided in the drain pipe assembly (6). First, connect the drain pipe assembly (6) to the beam body waterproof and drainage system (16), and then carry out the paving operation of the deck concrete protective layer (14); or when carrying out the paving operation of the deck concrete protective layer (14), leave the corresponding pipeline position vacant, and after the drain pipe assembly (6) is connected to the beam body waterproof and drainage system (16), then carry out the supplementary paving operation of the deck concrete protective layer (14).

10. The installation method according to claim 8, characterized in that: Sealant is applied at the contact points of the elastic plug (5) with the storage tank (9) and the clamping groove (10) for waterproof treatment; the drain pipe assembly (6) includes a drain pipe (18) and a drain pipe hoop (19). The drain pipe (18) is assembled on site with the profiled steel (1) or the elastic plug (5). When the drain pipe (18) is assembled on site with the profiled steel (1), the drain pipe (18) is fixed on the profiled steel (1) by heating the drain pipe (18); the drain pipe (18) outside the profiled steel (1) is tightened with a drain pipe hoop (19), and glue is applied at the tightened part for fixation to ensure that the drain pipe (18) is firmly fixed to the profiled steel (1).

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