Waterproof structure of road bridge
By installing F-shaped side beams and rubber sealing strips at bridge joints, combined with real-time detection using thermal imaging, the problem of poor sealing in traditional bridge waterproofing structures has been solved, enabling efficient water seepage detection and repair, and extending the service life of the bridge.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUZHOU PLANNING DESIGN & RES INST
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-19
AI Technical Summary
Traditional road and bridge waterproofing structures are simple, with poor sealing at the joints, making it difficult to find the points where water seeps in, resulting in difficult and costly maintenance.
Design a waterproof structure consisting of F-shaped side beams, rubber sealing strips, rigid central beams, and thermal imagers. The rubber sealing strips and linkage components adapt to the thermal expansion and contraction of the bridge to ensure sealing, and the thermal imagers detect water seepage points in real time.
It improved the bridge's sealing and maintenance efficiency, reduced maintenance costs, extended the bridge's service life, and reduced safety hazards.
Smart Images

Figure CN224259191U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of road and bridge technology, and in particular to waterproof structures for roads and bridges. Background Technology
[0002] Waterproof structures for roads and bridges are systematic protective measures designed to prevent water penetration and erosion of the main structure in bridge engineering. They typically consist of a waterproof layer, a drainage system, and joint sealing devices. Their core function is to prevent rainwater, snowmelt, and other external moisture from seeping into the bridge interior, avoiding problems such as concrete carbonization, steel corrosion, and freeze-thaw damage caused by long-term water erosion. This protects the strength and durability of the bridge structure and extends its service life. In addition, effective waterproof structures can reduce safety hazards such as slippage and icing caused by water accumulation on the bridge, ensuring driving safety. With the development of materials science and construction technology, modern waterproof structures place greater emphasis on multi-layer collaborative protection and intelligent monitoring functions, becoming one of the key technologies to ensure the safe operation of bridges throughout their entire life cycle.
[0003] Traditional road and bridge waterproofing structures are often simplistic, with sealing devices at bridge joints that are not flush with the bridge surface, resulting in poor sealing. This allows moisture to seep into the bridge, damaging its internal structure. Furthermore, it is difficult to locate the moisture ingress points, leading to challenging and costly repairs, shortening the bridge's lifespan, and even creating safety hazards.
[0004] Therefore, in response to the problems of traditional road and bridge waterproofing structures being simple, having uneven stress at joints, poor sealing, difficulty in locating water infiltration points, leading to difficult and costly maintenance, a waterproofing structure for road and bridges that can detect water seepage inside the bridge in real time, has strong sealing, and guides water flow can be designed. Utility Model Content
[0005] To overcome the problems of traditional road and bridge waterproofing structures being simple, having poor sealing, making it difficult to find water seepage points, resulting in difficult maintenance and high maintenance costs.
[0006] The technical solution of this utility model is as follows: a waterproof structure for road bridges, including a bridge body; and F-shaped side beams, with two F-shaped side beams fixedly connected to both sides of the bridge body. A rubber sealing strip is fixedly connected to the side of the F-shaped side beam away from the bridge body. A rigid central beam is provided between the two F-shaped side beams. Rubber sealing strips are fixedly connected to both sides of the rigid central beam. Several mounting plates are fixedly connected to the side of the F-shaped side beam near the bridge body. Rigid bracing is fixedly connected to the mounting plates. Several linkage components are fixedly connected to the lower end of the F-shaped side beam. A crossbeam is slidably connected to the linkage components. A thermal imager is fixedly connected to the side of the F-shaped side beam near the rigid central beam.
[0007] Preferably, F-shaped side beams are installed at both ends of the bridge joint. A rigid central beam is connected between the F-shaped side beams at both ends by a rubber sealing strip. The device is firmly connected to the bridge body by the mounting plates and rigid bracing on the sides of the F-shaped side beams. The crossbeam is then slidably connected to the linkage assembly below. When the bridge body is subjected to changes in temperature and other environmental factors, causing thermal expansion and contraction, the F-shaped side beams change with the changes in the bridge body, stretching or elongating the rubber sealing strip. At the same time, the linkage assembly moves on the crossbeam. When it rains, the rubber sealing strip waterproofs and dustproofs the internal structure, while the thermal imager detects in real time whether there is any water seepage inside.
[0008] Preferably, the upper part of the bridge body is provided with a waterproof surface layer, and the lower part of the linkage component is fixedly connected with anchor piles.
[0009] Preferably, the linkage component includes a connecting frame, a rubber support fixedly connected to the top of the connecting frame, a sliding support provided below the connecting frame, and a crossbeam slidably connected to the sliding support.
[0010] Preferably, a connecting inclined plate is fixedly connected to one side of the bridge body, and a water guide plate is fixedly connected to one side of the connecting inclined plate, with a filter groove provided at the end of the water guide plate.
[0011] Preferably, a filter tank is provided on one side of the rigid beam, a sewage pipe is connected to the pipe below the filter tank, and a cover plate is movably connected to the top of the filter tank.
[0012] Preferably, the filter tank is equipped with two filter screens, which are connected in a "V" shape and rotated together. A slider is fixedly connected to the other end of the filter screen.
[0013] Preferably, sliding grooves are provided on the inner walls of both sides of the filter tank, and sliders are slidably connected to the sliding grooves.
[0014] The beneficial effects of this utility model are:
[0015] The use of sealing devices such as rubber sealing strips ensures the structure's airtightness, enabling the device to prevent rain and dust in rainy and snowy weather. It also protects the joints and internal structure of the bridge from rainwater erosion, extending the bridge's service life. Furthermore, a thermal imager is installed to monitor the internal structure in real time, accurately locating any potential water seepage points. This facilitates subsequent maintenance and repairs, improving work efficiency and saving costs. Additionally, a water guide plate is installed on one side of the bridge to divert rainwater, preventing water accumulation and reducing the risk of seepage. Attached Figure Description
[0016] Figure 1 The diagram shown is a schematic representation of the overall three-dimensional structure of this utility model.
[0017] Figure 2 The diagram shown is a cross-sectional view of the rigid middle beam of this utility model.
[0018] Figure 3 The diagram shown is a cross-sectional view of the linkage component of this utility model.
[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of the filter tank of this utility model;
[0020] Figure 5 The diagram shown is a cross-sectional view of the filter tank of this utility model.
[0021] Explanation of reference numerals in the attached drawings: 1. Bridge body; 2. F-type side beam; 3. Rubber sealing strip; 4. Rigid central beam; 5. Waterproof surface layer of the bridge; 6. Mounting plate; 7. Rigid bracing; 801. Connecting frame; 802. Rubber bearing; 803. Sliding bearing; 9. Crossbeam; 10. Anchor pile; 11. Thermal imager; 12. Connecting inclined plate; 13. Water guide plate; 14. Filter tank; 1401. Sliding tank; 15. Sewage pipe; 16. Cover plate; 17. Filter screen; 18. Sliding block. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0023] Please see Figures 1-5This utility model provides an embodiment of a waterproof structure for a road bridge, comprising a bridge body 1 and F-shaped side beams 2. Two F-shaped side beams 2 are fixedly connected to both sides of the bridge body 1. A rubber sealing strip 3 is fixedly connected to the side of the F-shaped side beams 2 away from the bridge body 1. A rigid central beam 4 is provided between the two F-shaped side beams 2. Rubber sealing strips 3 are fixedly connected to both sides of the rigid central beam 4. Several mounting plates 6 are fixedly connected to the side of the F-shaped side beams 2 closest to the bridge body 1, and rigid supports are fixedly connected to the mounting plates 6. The F-shaped side beam 2 is fixedly connected to several linkage components at its lower end. A crossbeam 9 is slidably connected to the linkage components. A thermal imager 11 is fixedly connected to the side of the F-shaped side beam 2 near the rigid central beam 4. F-shaped side beams 2 are installed at both ends of the bridge joint. The rigid central beam 4 is connected to the F-shaped side beams 2 at both ends by a rubber sealing strip 3. The device is firmly connected to the bridge body 1 by the mounting plate 6 on the side of the F-shaped side beam 2 and the rigid support 7. The crossbeam 9 is then slidably connected to the linkage components below. When the bridge body 1 is subjected to temperature... When environmental changes cause thermal expansion and contraction, the F-shaped side beam 2 changes with the bridge body 1, stretching or elongating the rubber sealing strip 3, and simultaneously driving the linkage component to move on the crossbeam 9. When it rains, the rubber sealing strip 3 waterproofs and dustproofs the internal structure, while the thermal imager 11 detects in real time whether there is water seepage inside. The upper end of the bridge body 1 is provided with a bridge waterproof surface layer 5, and the lower part of the linkage component is fixedly connected with an anchor pile 10. The bridge waterproof surface layer 5 is used to waterproof the surface of the bridge body 1, and the anchor pile 10 is used to firmly fix the linkage component to the bridge body 1. The linkage component includes a connecting frame 801, a rubber support 802 is fixedly connected above the connecting frame 801, and a sliding support 803 is provided below the connecting frame 801. The crossbeam 9 is slidably connected to the sliding support 803. The connecting frame 801 is used for fixing and installation, the rubber support 802 absorbs the vibration generated by the bridge body 1 and maintains the sealing of the structure, and the sliding support 803 is used to realize the sliding of the crossbeam 9.
[0024] Please see Figures 1-5In this embodiment, a connecting inclined plate 12 is fixedly connected to one side of the bridge body 1, and a water guide plate 13 is fixedly connected to one side of the connecting inclined plate 12. A filter groove 14 is provided at the end of the water guide plate 13. When it rains, the rainwater on the surface of the bridge body 1 will first flow through the connecting inclined plate 12 to the water guide plate 13, and then flow into the filter groove 14 through the water guide plate 13. A filter groove 14 is provided on one side of the rigid middle beam 4. A sewage pipe 15 is connected to the pipe below the filter groove 14, and a cover plate 16 is movably connected above the filter groove 14. The rainwater flowing into the filter groove 14 is discharged through the sewage pipe 15. At the same time, the cover plate 16 is provided to prevent pedestrians from accidentally entering. The filter tank 14 contains two filter screens 17, which are connected in a "V" shape. A slider 18 is fixedly connected to the other end of each filter screen 17. Rainwater entering the filter tank 14 is filtered by the filter screens 17, and the filtered impurities fall to the bottom of the two filter screens 17 without clogging them. The inner walls on both sides of the filter tank 14 are provided with sliding grooves 1401, and sliders 18 are slidably connected to the sliding grooves 1401. When there are too many impurities in the filter tank 14, the staff needs to open the cover plate 16, pull the slider 18 to slide on the sliding grooves 1401, and remove the filter screens 17.
[0025] During operation, F-shaped side beams 2 are installed at both ends of the bridge joint. A rigid central beam 4 is connected between the F-shaped side beams 2 at both ends via a rubber sealing strip 3. The device is firmly connected to the bridge body 1 via mounting plates 6 and rigid bracing 7 on the sides of the F-shaped side beams 2. A crossbeam 9 is then slidably connected to the lower linkage assembly. The linkage assembly is firmly fixed to the bridge body 1 via anchor piles 10. When the bridge body 1 is subjected to environmental changes such as temperature fluctuations, causing thermal expansion and contraction, the F-shaped side beams 2 change with the bridge body 1, stretching or elongating the rubber sealing strip 3, and simultaneously moving the linkage assembly on the crossbeam 9. When rainfall occurs, the rubber sealing strip 3... The system is waterproof and dustproof, and the thermal imager 11 can detect in real time whether there is water seepage inside. The bridge waterproof surface layer 5 is used to waterproof the surface of the bridge body 1. Rainwater on the surface of the bridge body 1 will first flow through the connecting inclined plate 12 to the water guide plate 13, and then flow through the water guide plate 13 into the filter tank 14. The rainwater entering the filter tank 14 is filtered by the filter screen 17. The filtered impurities fall to the bottom of the two filter screens 17 and will not clog the filter screens 17. The filtered rainwater is discharged through the sewage pipe 15. When there are too many impurities in the filter tank 14, the staff needs to open the cover plate 16, pull the slider 18 to slide on the sliding groove 1401, and take out the filter screen 17.
[0026] Through the above steps, the sealing devices such as rubber sealing strips 3 ensure the airtightness of the structure, enabling the device to play a role in preventing rain and dust in rainy and snowy weather. It protects the joints and internal structure of the bridge, preventing the internal structure from being eroded by rainwater and extending the service life of the bridge. At the same time, a thermal imager 11 is set up to monitor the internal structure in real time, accurately locate the presence of water seepage points inside the bridge, facilitate subsequent maintenance by staff, improve maintenance efficiency, and save maintenance costs. In addition, a water guide plate 13 is also set on one side of the bridge to divert rainwater and prevent rainwater accumulation, which increases the risk of water seepage. This solves the problems of traditional road and bridge waterproofing structures being simple, with uneven stress at joints, poor sealing, difficulty in finding water seepage points, and resulting in difficult and costly maintenance.
[0027] It should be understood that this embodiment is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.
Claims
1. A waterproof structure for road bridges, comprising a bridge body (1); characterized in that: It also includes F-shaped side beams (2), two F-shaped side beams (2) are fixedly connected to both sides of the bridge body (1), rubber sealing strips (3) are fixedly connected to the side of the F-shaped side beams (2) away from the bridge body (1), a rigid middle beam (4) is provided between the two F-shaped side beams (2), rubber sealing strips (3) are fixedly connected to both sides of the rigid middle beam (4), several mounting plates (6) are fixedly connected to the side of the F-shaped side beams (2) close to the bridge body (1), rigid bracing (7) is fixedly connected to the mounting plates (6), several linkage components are fixedly connected to the lower end of the F-shaped side beams (2), a crossbeam (9) is slidably connected to the linkage components, and a thermal imager (11) is fixedly connected to the side of the F-shaped side beams (2) close to the rigid middle beam (4).
2. The waterproof structure for road bridges according to claim 1, characterized in that: The upper end of the bridge body (1) is provided with a bridge waterproof surface layer (5), and the lower part of the linkage component is fixedly connected with an anchor pile (10).
3. The waterproof structure for road bridges according to claim 1, characterized in that: The linkage component includes a connecting frame (801), a rubber support (802) fixedly connected above the connecting frame (801), a sliding support (803) provided below the connecting frame (801), and a crossbeam (9) slidably connected to the sliding support (803).
4. The waterproof structure for road bridges according to claim 1, characterized in that: A connecting inclined plate (12) is fixedly connected to one side of the bridge body (1), and a water guide plate (13) is fixedly connected to one side of the connecting inclined plate (12). A filter groove (14) is provided at the end of the water guide plate (13).
5. The waterproof structure for road bridges according to claim 1, characterized in that: A filter tank (14) is provided on one side of the rigid beam (4), a sewage pipe (15) is connected to the pipe below the filter tank (14), and a cover plate (16) is movably connected above the filter tank (14).
6. The waterproof structure for road bridges according to claim 1, characterized in that: The filter tank (14) is equipped with two filter screens (17), which are connected in a "V" shape. The other end of the filter screen (17) is fixedly connected to a slider (18).
7. The waterproof structure for road bridges according to claim 1, characterized in that: The filter tank (14) has sliding grooves (1401) on both sides of the inner wall, and a slider (18) is slidably connected to the sliding grooves (1401).