A bridge drainage foundation structure
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGTIAN DESIGN CONSULTING CO LTD
- Filing Date
- 2025-08-01
- Publication Date
- 2026-06-30
Smart Images
Figure CN224431233U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge engineering, and in particular to a bridge drainage foundation structure. Background Technology
[0002] In bridge construction, box girder construction is widely used due to its fast construction speed, prefabrication and cast-in-place capabilities, and wide applicability. Currently, bridge projects using box girder construction generally employ a drainage design that only installs collection wells at the piers and connects them to vertical drainage pipes, directly discharging rainwater from the bridge deck into the municipal pipe network. However, this point-based, decentralized drainage method, with only piers, forces rainwater to travel a long longitudinal distance across the bridge deck. If there are low-lying areas between adjacent piers, rainwater cannot drain effectively, leading to water accumulation on the bridge surface. Prolonged water accumulation can damage the bridge deck, exacerbate damage to the asphalt pavement, and increase the risk of structural leakage, threatening the bridge's durability and safety.
[0003] Meanwhile, the existing bridge deck water collection and diversion structures are all open-type. Open-type water collection structures are easily blocked by wind or debris scattered by vehicles, and because they are lower than the road surface, they are difficult to clear by airflow, requiring frequent manual maintenance. Moreover, traditional drainage pipes are prone to falling off due to the accumulation of silt inside, which increases the weight of the water inside the pipe, making daily maintenance extremely troublesome and difficult. Utility Model Content
[0004] To optimize existing bridge drainage methods, preventing excessive water accumulation on the bridge deck and reducing the likelihood of blockages in the bridge drainage structure, this application provides a bridge drainage foundation structure.
[0005] The bridge drainage foundation structure provided in this application adopts the following technical solution:
[0006] A bridge drainage foundation structure includes a bridge body and a drainage structure disposed on the bridge body. The bridge body includes a box girder serving as the bridge deck and bridge piers for support. The drainage structure includes a water collection component disposed on the box girder, a direct discharge component disposed on the bridge piers, and a buried water collection well. The water collection component connects the bridge deck and the direct discharge component. The direct discharge component is used to directly introduce rainwater flowing into the water collection component into the water collection well. The water collection well is used to collect the incoming rainwater and discharge it into the municipal rainwater system nearby.
[0007] The water collection component includes a water collection channel, a water collection riser, and a water collection buffer pipe. The water collection channel is located on both sides of the box girder and between adjacent adjacent connections. The upper surface of the box girder is paved with an asphalt layer in a structure that is higher in the middle and lower on both sides. The lowest point of the asphalt layer is connected to the water collection channel. The upper surface of the water collection channel is provided with a water-permeable barrier layer. The water collection riser is evenly located at the bottom of the water collection channel and is connected to the water collection channel. The water collection buffer pipe connects the water collection riser and the direct discharge component.
[0008] By adopting the above technical solution, rainwater on the bridge deck can flow not only to the drainage channels on both sides, but also to the joints of adjacent box girders, achieving efficient collection of rainwater from the bridge deck. Furthermore, through the collection and diversion of the water in the collection components, combined with the fixed-point direct discharge components, the longitudinal flow distance of rainwater on the bridge deck can be significantly shortened, thereby improving the drainage efficiency of the bridge deck and reducing the risk of water accumulation on the bridge. In addition, the permeable barrier layer at the top of the drainage channel can prevent impurities on the bridge deck from entering the water collection components with the water flow, reducing the probability of blockage and helping to reduce the daily maintenance requirements of the bridge's drainage structure.
[0009] Optionally, the cross slope of the asphalt layer is 1.5%-2.5%.
[0010] By adopting the above technical solutions, it can be ensured that rainwater on the bridge surface flows fully to both sides, which helps to reduce water accumulation on the bridge surface.
[0011] Optionally, the barrier layer is composed of a grating and porous stones, the grating is laid above the water collection channel, and the height of the grating is lower than the height of the asphalt layer. The grating is uniformly provided with permeable holes with a diameter of less than 10 mm, and the area of the perforated area of the grating accounts for 70%-80% of the total area.
[0012] The porous stones are all larger than the permeable holes and are evenly laid on top of the grating, so that the barrier layer and the asphalt layer are level with each other.
[0013] By adopting the above technical solution, by controlling the opening area of the grating plate and cooperating with the porous stones laid on top, it is possible to effectively prevent debris on the bridge surface from entering the drainage channel with the water flow. At the same time, because the porous stones make the surfaces of the barrier layer and the asphalt layer level with each other, the debris accumulated on the barrier layer is easily cleared or carried away by the passing airflow, reducing the frequency of manual cleaning and maintenance.
[0014] Optionally, the top opening of the water collection riser is located at the lowest end of the water collection channel, and a low-pressure one-way valve is also provided at the top opening of the water collection riser.
[0015] By adopting the above technical solution, it can be ensured that rainwater in the collection channel flows fully into the collection riser. At the same time, the low-pressure one-way valve can effectively prevent rats, cockroaches and other pests from entering the collection channel from the lower pipe, and can also play a certain role in controlling the drainage flow rate.
[0016] Optionally, the water collection riser is staggered from the straight discharge component, the water collection buffer pipe is inclined downward and extends toward the straight discharge component, and the angle between the water collection buffer pipe and the horizontal plane is 3°-5°.
[0017] By adopting the above technical solution, it can be ensured that the water collection buffer pipe has an appropriate length and slope, thereby meeting the needs of buffer drainage. This not only helps to prevent damage to the pipe caused by a large impact when directly discharging a large amount of rainwater, but also ensures the water flow rate during normal drainage.
[0018] Optionally, a water collection elbow is provided between the water collection riser and the water collection buffer pipe, and a first inspection port is provided on one side of the water collection elbow.
[0019] By adopting the above technical solution, the water collection elbow can store some of the silt washed in by the water flow, thereby reducing the accumulation of silt in the water collection buffer pipe and ensuring that the water collection buffer pipe can drain smoothly. In addition, setting up a first inspection port facilitates the routine inspection and maintenance of the water collection riser, water collection buffer pipe and water collection elbow by maintenance personnel.
[0020] Optionally, the straight discharge component includes a straight discharge riser and a straight discharge buffer pipe. The straight discharge riser extends vertically along the pier column. One end of the straight discharge riser is connected to the water collection buffer pipe, and the other end is connected to the straight discharge buffer pipe. The angle between the straight discharge buffer pipe and the straight discharge riser is 135°-150°. The straight discharge buffer pipe extends downward at an angle and is connected to the water collection well.
[0021] By adopting the above technical solution, the inclined straight discharge slow pipe can smoothly introduce rainwater in the straight discharge riser into the collection well, and at the same time slow down the water flow velocity when the straight discharge component drains, which helps to prevent damage to the pipe caused by a large impact when a large amount of rainwater is discharged directly.
[0022] Optionally, a second inspection port is provided at one end of the straight discharge riser connected to the water collection buffer pipe, and a third inspection port is provided at the other end of the straight discharge riser connected to the straight discharge buffer pipe.
[0023] By adopting the above technical solutions, it is beneficial for maintenance personnel to carry out daily inspection and maintenance of water collection slow pipes, direct discharge risers and direct discharge slow pipes.
[0024] Optionally, the water collection well is equipped with municipal pipelines and infiltration pipelines. The municipal pipelines are interconnected with the municipal rainwater system, and the infiltration pipelines are interconnected with the ground under the bridge. The municipal pipelines are installed at a height 15-20cm higher than the infiltration pipelines.
[0025] By adopting the above technical solution, when the bridge is draining a large amount of water, some rainwater can be retained through the infiltration pipes and seep into the green belt under the bridge, while the excess rainwater is discharged into the municipal stormwater system through municipal pipes. This satisfies the requirement of sufficient drainage and prevents excessive waterlogging under the bridge, while also meeting the normal irrigation needs of the green belt under the bridge. This is conducive to realizing the utilization of water resources in a sponge city.
[0026] In summary, the technical solution of this application has at least one of the following beneficial effects:
[0027] 1. By rationally designing the bridge deck structure on the upper surface of the box girder, and in conjunction with the water collection channels set on both sides of the box girder and at the box girder connection, rainwater on the bridge deck can not only flow to the water collection channels on both sides, but also flow to the joints of adjacent box girders, thus achieving efficient collection of rainwater on the bridge deck.
[0028] 2. By collecting and diverting water through the water collection components, and then discharging it into the water collection well through the fixed-point direct discharge components, the longitudinal flow distance of rainwater on the bridge surface can be significantly shortened, which is conducive to improving the drainage efficiency of the bridge surface and reducing the risk of water accumulation on the bridge.
[0029] 3. By setting a permeable barrier layer on the top of the water collection channel, impurities on the bridge surface can be prevented from entering the water collection components with the water flow, thereby reducing the probability of blockage in the water collection components and reducing the daily maintenance requirements of the bridge drainage structure.
[0030] 4. By installing infiltration pipes that connect to the ground in the water collection wells, some rainwater can infiltrate into the green belt under the bridge through the infiltration pipes, which not only meets the requirements for sufficient drainage, but also meets the normal irrigation needs of the green belt under the bridge, which is conducive to realizing the utilization of water resources in the sponge city. Attached Figure Description
[0031] Figure 1 This is a side view of a bridge drainage foundation structure according to an embodiment of this application.
[0032] Figure 2 This is a front view of a bridge drainage foundation structure according to an embodiment of this application.
[0033] Figure 3 yes Figure 2 A magnified view of part a.
[0034] Explanation of reference numerals in the attached figures:
[0035] 1. Bridge body; 11. Box girder; 111. Asphalt layer; 12. Pier column; 2. Drainage structure; 21. Water collection components; 211. Water collection channel; 212. Water collection riser; 2121. Low-pressure check valve; 213. Water collection buffer pipe; 214. Water collection elbow; 2141. First inspection port; 22. Direct discharge components; 221. Direct discharge riser; 2211. Second inspection port; 2212. Third inspection port; 222. Direct discharge buffer pipe; 23. Water collection well; 231. Municipal pipeline; 232. Infiltration pipeline; 24. Barrier layer; 241. Grating plate; 242. Porous stone blocks. Detailed Implementation
[0036] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.
[0037] This application discloses a bridge drainage foundation structure. (Refer to...) Figure 1 and Figure 2 A bridge drainage foundation structure includes a bridge body 1 and a drainage structure 2. The bridge body 1 includes a box girder 11 serving as the bridge deck and bridge piers 12 for support. The drainage structure 2 includes interconnected water collection components 21, direct discharge components 22, and water collection wells 23. Specifically, the water collection components 21 are located on the bottom side of the box girder 11 to collect rainwater from the bridge deck and guide it into the direct discharge components 22. The direct discharge components 22 are located on the bridge piers 12 and extend vertically downwards along the bridge piers 12 to further guide rainwater into the water collection wells 23. The water collection wells 23 are buried underground, specifically located on one side of the bridge piers 12 and interconnected with the municipal stormwater system. The water collection wells 23 are used to initially collect the incoming rainwater and then discharge it into the municipal stormwater system nearby.
[0038] Reference Figure 1 and Figure 2 The top surface of the box girder 11 is paved with an asphalt layer 111 from the center to both sides, serving as the bridge deck. Specifically, the overall bridge deck has a paving structure that is higher in the middle and lower on both sides, with a cross slope of 2%. This allows rainwater to flow along the slope to both sides of the bridge deck. In other embodiments, the cross slope can be adjusted between 1.5% and 2.5% depending on the actual site construction conditions. The bridge piers 12 are specifically located in the middle of the box girder 11 and at the joints between adjacent box girders 11, thereby providing sufficient support for the box girder 11.
[0039] Reference Figure 1 and Figure 2The water collection component 21 includes interconnected water collection channels 211, water collection risers 212, and water collection buffer pipes 213. The water collection channels 211 are located on both sides of the box girder 11 and at the joints of adjacent box girders 11. The water collection channels 211 are positioned below the lowest point of the asphalt layer 111 on the bridge deck, so that rainwater from the bridge deck can flow fully into the water collection channels 211 and then through the water collection risers 212 and water collection buffer pipes 213 to the direct discharge component 22.
[0040] Reference Figure 2 and Figure 3 The upper surface of the drainage channel 211 is also provided with a permeable barrier layer 24. The upper surface of the barrier layer 24 is flush with the asphalt layer 111 of the bridge deck. The barrier layer 24 is used to prevent debris on the bridge deck from flowing into the drainage channel 211 with the water flow. Specifically, the barrier layer 24 is made of multiple sets of grating plates 241 and porous stones 242. The grating plates 241 are laid on top of the drainage channel 211, and the laying height of the grating plates 241 is lower than the height of the asphalt layer 111. The grating plates 241 can be made of traditional metal, stainless steel or high-strength plastic material, as long as the grating plates 241 are sturdy and durable. In this embodiment, the grating plates 241 are specifically made of traditional metal. The grating plate 241 is uniformly provided with permeable holes with a diameter of less than 10 mm, and the opening area of the grating plate 241 accounts for 70%-80% of the total area to ensure that the grating plate 241 has good load-bearing capacity and water permeability. In this embodiment, the opening area of the grating plate 241 accounts for 80% of the total area.
[0041] Reference Figure 3 The porous stones 242 have a particle size larger than the permeable holes on the grating plate 241 and are evenly laid on top of the grating plate 241, making the barrier layer 24 and the asphalt layer 111 surface flush. This allows debris accumulated on the barrier layer 24 to be easily cleared or carried away by the passing airflow, reducing the frequency of manual maintenance. The porous stones 242 can be made of volcanic rock or clay. In this embodiment, the porous stones 242 are specifically a mixture of clay bricks and volcanic rock. The clay bricks are laid on top of the grating plate 241, and the volcanic rock is further laid on top of the clay bricks. The regular clay bricks can prevent broken volcanic rock from clogging the permeable holes on the grating plate 241.
[0042] Reference Figure 2 and Figure 3 Both the water collection riser 212 and the water collection buffer pipe 213 are fixed to the bottom side of the box girder 11 by pipe clamps. The water collection riser 212 is evenly distributed at the bottom of the water collection channel 211, and its top opening is connected to the bottom end of the water collection channel 211. The top opening of the water collection riser 212 is also equipped with a low-pressure one-way valve 2121. The low-pressure one-way valve 2121 is used to prevent rats, cockroaches, etc. from entering the water collection channel 211 from the lower pipe, and also plays a certain role in controlling the drainage flow.
[0043] Reference Figure 1 and Figure 2 The water collection buffer pipe 213 connects the water collection riser 212 and the direct discharge component 22. The water collection riser 212 and the direct discharge component 22 are staggered, meaning a certain distance is reserved between the water collection riser 212 and the bridge pier column 12. The water collection buffer pipe 213 slopes downwards and extends towards the direct discharge component 22. Specifically, the angle between the water collection buffer pipe 213 and the horizontal plane is 3°-5° to ensure that the water collection buffer pipe 213 has an appropriate length and slope, thereby meeting the needs of buffering drainage and helping to prevent damage to the pipe caused by the large impact of direct discharge of large amounts of rainwater. In this embodiment, the angle between the water collection buffer pipe 213 and the horizontal plane is 3°.
[0044] Reference Figure 1 and Figure 2 A water collection elbow 214 is also provided between the water collection riser 212 and the water collection buffer pipe 213. The water collection elbow 214 can store some of the silt washed in by the water flow, thereby reducing the accumulation of silt in the water collection buffer pipe 213 and ensuring that the water collection buffer pipe 213 can drain smoothly. Furthermore, a first inspection port 2141 is provided above the water collection elbow 214, so that maintenance personnel can inspect the specific condition of the water collection riser 212, the water collection buffer pipe 213, and the water collection elbow 214 through the first inspection port 2141.
[0045] Reference Figure 1 and Figure 2 The straight discharge component 22 includes a straight discharge riser 221 and a straight discharge buffer pipe 222. The straight discharge riser 221 extends vertically along the pier column 12. The top end of the straight discharge riser 221 is connected to the two side water collection buffer pipes 213 via a tee. The straight discharge buffer pipe 222 is located at the bottom end of the straight discharge riser 221 and extends downward at an angle, connecting to the water collection well 23. Specifically, the angle between the straight discharge buffer pipe 222 and the straight discharge riser 221 is 135°-150° to facilitate the introduction of water from the straight discharge riser 221 into the water collection well 23. In this embodiment, the angle between the straight discharge buffer pipe 222 and the straight discharge riser 221 is 135°. Furthermore, a second inspection port 2211 is provided at the end where the straight drain riser 221 connects to the water collection buffer pipe 213, and a third inspection port 2212 is provided at the end where the straight drain riser 221 connects to the straight drain buffer pipe 222, so that maintenance personnel can carry out maintenance on the water collection buffer pipe 213, the straight drain riser 221 and the straight drain buffer pipe 222.
[0046] Reference Figure 1 and Figure 2The water collection well 23 is equipped with a municipal pipeline 231 and an infiltration pipeline 232. The municipal pipeline 231 is connected to the municipal rainwater system, while the infiltration pipeline 232 is connected to the ground under the bridge. The municipal pipeline 231 is set at a height 15-20cm higher than the infiltration pipeline 232. In this embodiment, it is 15cm higher so that when the bridge is draining a large amount of water, some rainwater can be retained through the infiltration pipeline 232 and infiltrate into the green belt under the bridge, while the excess rainwater flows into the municipal rainwater system through the municipal pipeline 231 and is discharged away. This satisfies the requirement of sufficient drainage and prevents excessive waterlogging under the bridge. It also meets the normal irrigation needs of the green belt under the bridge, which is conducive to realizing the utilization of water resources in a sponge city.
[0047] The implementation principle of a bridge drainage foundation structure according to an embodiment of this application is as follows:
[0048] By rationally setting up the water collection component 21, the direct discharge component 22, and the water collection well 23, and coordinating the specific installation positions of the bridge deck structure and drainage structure 2 of the box girder 11, the traditional method of directly draining water only at the piers has been changed. This allows rainwater on the bridge deck to flow not only to the water collection channels 211 on both sides, but also to the joints of the adjacent box girders 11. Through the collection and diversion of the water collection component 21, rainwater can be quickly discharged, effectively preventing water accumulation on the bridge.
[0049] Meanwhile, through the cooperation of the barrier layer 24 installed on the bridge deck and the low-pressure one-way valve 2121 at the top of the water collection riser 212, the double barrier protection structure can effectively prevent impurities or silt from the bridge deck from mixing into the drainage structure 2, which helps reduce the probability of blockage in the drainage structure 2. In addition, multiple inspection ports are set up to allow for targeted inspection of different blockage locations in the drainage structure 2, which helps improve the inspection efficiency of maintenance personnel. Compared with the existing drainage structure 2, the above solution greatly improves the efficiency and stability of bridge drainage, which not only helps reduce damage to the bridge, but also helps reduce daily inspection and maintenance costs.
[0050] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this specific embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.
Claims
1. A bridge drainage foundation structure, characterized in that: The system includes a bridge body (1) and a drainage structure (2) installed on the bridge body (1). The bridge body (1) includes a box girder (11) serving as the bridge deck and a pier column (12) for support. The drainage structure (2) includes a water collection component (21) installed on the box girder (11), a direct discharge component (22) installed on the pier column (12), and a buried water collection well (23). The water collection component (21) connects the bridge deck and the direct discharge component (22). The direct discharge component is used to directly introduce rainwater flowing into the water collection component (21) into the water collection well (23). The water collection well (23) is used to collect the incoming rainwater and discharge it into the municipal rainwater system nearby. The water collection component (21) includes a water collection channel (211), a water collection riser (212), and a water collection buffer pipe (213). The water collection channel (211) is located on both sides of the box girder (11) and between adjacent adjacent connections. The upper surface of the box girder (11) is covered with an asphalt layer (111) in a structure that is high in the middle and low on both sides. The lowest point of the asphalt layer (111) is connected to the water collection channel (211). The upper surface of the water collection channel (211) is provided with a water-permeable barrier layer (24). The water collection riser (212) is evenly located at the bottom of the water collection channel (211) and is connected to the water collection channel (211). The water collection buffer pipe (213) is connected to the water collection riser (212) and the direct discharge component (22).
2. The bridge drainage foundation structure according to claim 1, characterized in that: The cross slope of the asphalt layer (111) is 1.5%-2.5%.
3. A bridge drainage foundation structure according to claim 1, characterized in that: The barrier layer (24) is composed of a grating plate (241) and porous stones (242). The grating plate (241) is laid above the water collection channel (211), and the laying height of the grating plate (241) is lower than the height of the asphalt layer (111). The grating plate (241) is uniformly provided with water-permeable holes with a diameter of less than 10 mm, and the opening area of the grating plate (241) accounts for 70%-80% of the total area. The porous stones (242) are all larger than the permeable holes and are evenly laid on top of the grid plate (241), so that the barrier layer (24) and the asphalt layer (111) are level with each other.
4. A bridge drainage foundation structure according to claim 1, characterized in that: The top opening of the water collection riser (212) is located at the lowest end of the water collection channel (211), and a low-pressure one-way valve (2121) is also provided at the top opening of the water collection riser (212).
5. A bridge drainage foundation structure according to claim 1, characterized in that: The water collection riser (212) is staggered from the straight discharge component (22). The water collection buffer pipe (213) is inclined downward and extends toward the straight discharge component (22). The angle between the water collection buffer pipe (213) and the horizontal plane is 3°-5°.
6. A bridge drainage foundation structure according to claim 1, characterized in that: A water collection elbow (214) is also provided between the water collection riser (212) and the water collection slow pipe (213), and a first inspection port (2141) is provided on one side of the water collection elbow (214).
7. A bridge drainage foundation structure according to claim 1, characterized in that: The straight discharge component (22) includes a straight discharge riser (221) and a straight discharge buffer pipe (222). The straight discharge riser (221) extends vertically along the pier column (12). One end of the straight discharge riser (221) is connected to the water collection buffer pipe (213), and the other end is connected to the straight discharge buffer pipe (222). The angle between the straight discharge buffer pipe (222) and the straight discharge riser (221) is 135°-150°. The straight discharge buffer pipe (222) extends downward at an angle and is connected to the water collection well (23).
8. A bridge drainage foundation structure according to claim 7, characterized in that: A second inspection port (2211) is provided at one end of the straight discharge riser (221) connected to the water collection buffer pipe (213), and a third inspection port (2212) is provided at one end of the straight discharge riser (221) connected to the straight discharge buffer pipe (222).
9. A bridge drainage foundation structure according to claim 1, characterized in that: The water collection well (23) is equipped with a municipal pipeline (231) and an infiltration pipeline (232). The municipal pipeline (231) is connected to the municipal rainwater system, and the infiltration pipeline (232) is connected to the ground under the bridge. The municipal pipeline (231) is installed at a height 15-20cm higher than the infiltration pipeline (232).