Water storage and drainage structure for sponge city road
By designing planting bases and drainage systems on urban roads, rainwater can be diverted and buffered for storage, solving the problem of urban road sewers being overloaded during heavy rains, improving drainage capacity and the health of green plants, and conforming to the concept of sponge city construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA WATER RESOURCES PEARL RIVER PLANNING SURVERYING & DESIGNING
- Filing Date
- 2024-04-01
- Publication Date
- 2026-06-02
AI Technical Summary
Existing urban road sewer systems are prone to overload during heavy rains, leading to road flooding, traffic disruptions, and a lack of effective water storage structures, which does not align with the concept of a sponge city.
Design a water storage and drainage structure for sponge city roads, including a planting base, a ditch mechanism and a support mechanism. The rainwater is filtered and stored by using the filter plate, drainage tray and root barrier layer in the planting base. Combined with the design of the drainage pipe and ditch, rainwater diversion and buffer storage are achieved.
It effectively alleviates the load on urban drainage systems during heavy rain, improves road drainage capacity, prevents road water accumulation, maintains the health of green plants, does not affect aesthetics, and is easy to clean and maintain.
Smart Images
Figure CN118048824B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of water storage and drainage technology, and more specifically, it relates to a water storage and drainage structure for sponge city roads. Background Technology
[0002] Sponge city roads refer to urban roads developed and constructed using sponge-like materials and design concepts. A sponge city is a city model with excellent water environment management capabilities, able to mitigate flooding and drainage pressures in the face of extreme weather events.
[0003] In typical urban sewers, rainwater from the roadside flows into the sewers through roadside storm drains. However, the drainage ditches themselves lack water storage structures and only serve to divert water. They rely entirely on the urban sewer system for water storage and drainage. In cases of heavy rainfall, this can easily lead to the urban sewer system being overloaded, causing rainwater to accumulate on the road and disrupting traffic. This does not conform to the concept of a sponge city.
[0004] Therefore, in view of this, we will study and improve the existing structure and its shortcomings, and provide a water storage and drainage structure for sponge city roads, in order to achieve a more practical value. Summary of the Invention
[0005] To address the aforementioned technical problems, this invention provides a water storage and drainage structure for sponge city roads.
[0006] A water storage and drainage structure for sponge city roads includes a planting base. The planting base is a dish-shaped structure with a grooved upper surface and outward expansion at the bottom on both sides. A support mechanism is provided inside the planting base, and a ditch mechanism is provided on both sides of the planting base. The support mechanism includes a filter plate, a drainage tray, a root barrier layer, and four support frames. The ditch mechanism includes a trench and a cover plate. A rectangular installation groove is opened on the cover plate. A blocking mechanism is provided in the installation groove. The blocking mechanism includes a rectangular installation ring and a cover plate. A drainage pipe is provided below the trench. A water channel runs through the surface of the trench facing the planting base. Three equidistant drainage grooves are opened in the middle part of the inner bottom surface of the planting base. A strip-shaped drainage channel is opened inside the middle part of the planting base. A drainage groove is opened at the front end of the middle part of the bottom surface of the planting base. Through grooves run through the left and right sides of the front end of the inner wall of the planting base. The water channel is connected to the through groove.
[0007] Preferably, the left and right inner walls of the planting base are provided with four equidistant slots, which penetrate the upper surface of the planting base. Each slot has a sleeve fixedly connected to its upper opening. Each sleeve is fixedly fitted with a water level cylinder, and each water level cylinder has four equidistant water level columns fixedly connected to its upper end. The upper ends of the four water level columns on the same water level cylinder are fixedly connected to a supporting top plate.
[0008] Preferably, each support frame has a fixed bracket at both ends, eight brackets are movably engaged in eight slots, four support frames and three support top plates are flush, a support rod is fixedly connected to the bottom surface of each support frame, and each support frame is in contact with the inner bottom surface of the planting base.
[0009] The upper surface of the card holder is flush with the upper surface of the planting base.
[0010] Preferably, each of the first and second drain channels is connected to the drainage channel.
[0011] Preferably, the filter plate, drainage tray, and root barrier layer have the same area and thickness and are attached sequentially from top to bottom;
[0012] The filter plate and the drain tray are provided with circular grooves at the four corners. The root barrier layer is fixedly connected to the four corners at the upper surface of the filter plate. Each insertion post is provided with a threaded groove on its upper surface. The four insertion posts are movably connected to the four circular grooves on the filter plate and the drain tray respectively. The upper ends of the four insertion posts are flush with the upper surface of the filter plate. Each threaded groove is threaded with a screw rod with a pull ring. The bottom of the pull ring on the screw rod is pressed against the upper surface of the filter plate.
[0013] Preferably, when the filter plate, drainage tray, and root barrier layer are attached sequentially from top to bottom, the filter plate, drainage tray, and root barrier layer are all attached to the inner wall of the planting base, and the bottom surface of the root barrier layer is attached to the support frame and the top support plate.
[0014] The area between the upper surface of the filter layer and the inner wall of the planting base is filled with planting soil, and municipal green plants are planted on the planting soil.
[0015] Preferably, the left end of the drain pipe is an elbow end, the middle part of the drain pipe is fixedly connected to a connecting pipe, and the bottom of the end of the trench away from the installation groove is fixedly connected to a first drain pipe, the bottom of the first drain pipe being fixedly sleeved with the elbow end of the drain pipe.
[0016] Preferably, a drain pipe is fixedly sleeved at the bottom of the second drain trough, the second drain pipe is fixedly sleeved at the upper end of the connecting pipe, and the other end of the drain pipe is connected to the sewer line.
[0017] Preferably, a rectangular mounting ring is fixedly installed in the mounting groove, and two pairs of limiting plates are fixedly connected to the bottom surface of the rectangular mounting ring. The limiting plates extend beyond the inner wall of the rectangular mounting ring but do not extend beyond the outer wall of the rectangular mounting ring. The cover plate abuts against the upper surface of the four limiting plates and is movably locked inside the rectangular mounting ring.
[0018] The rectangular mounting ring and the bottom of the cover plate, away from the drain pipe, are both fixedly connected to a connecting lock ring, and a metal chain is fixedly connected between the connecting lock rings.
[0019] Preferably, two sets of short rods are fixedly connected to the bottom surface of the cover plate, and triangular collection hoppers are fixedly connected to the bottom of the short rods. The bottom and side walls of the collection hoppers are provided with leakage holes.
[0020] Compared with the prior art, the present invention has the following beneficial effects:
[0021] In this invention, the entire device is installed between the motor vehicle lane and the non-motor vehicle lane of an urban road as a buffer zone. The trenches on both sides of the planting base are used to collect rainwater from the motor vehicle lane and the non-motor vehicle lane respectively. The rainwater flows into the trench through the cover plate and flows into the drain pipe one along the trench. The height of one side of the drain pipe one is two centimeters lower than that of the cover plate side so that the water can flow into the drain pipe one. This design can be laid normally on flat ground and downhill roads. On uphill roads, it is only necessary to reverse the direction of the planting base and the trench as a whole to drain normally. It has high applicability and does not require any structural changes.
[0022] In this invention, debris on the road is blocked on the surface by the cover and can be cleaned by sanitation workers. Fine impurities mixed with rainwater flow into the cover and are filtered by the collection bucket. Rainwater with low impurity content flows into the ditch, while the impurities remain in the collection bucket. Sanitation workers can periodically pull out the rectangular mounting ring of the cover, and the collection bucket moves out with the cover. The collection bucket has a scoop-shaped structure, which facilitates the emptying of impurities. The chain between the two connecting locking rings is used for theft protection of the cover. The bucket-shaped collection bucket allows impurities to accumulate at the rear end of the collection bucket under the flushing of rainwater as more and more impurities are collected, preventing the collection bucket from being blocked over a large area and affecting the water leakage effect, and effectively extending the time interval for sanitation workers to clean the collection bucket.
[0023] In this invention, under normal circumstances, the screw is buried in the planting soil layer, and the surface of the entire device has no obvious appearance features that are different from traditional green belts, so it does not affect the aesthetics. When it is necessary to open the planting base for internal cleaning, maintenance, or other operations, the soil layer at the four corners can be removed to expose the ring at the top of the screw. A rope is tied to the ring on the screw, and then the filter plate, drainage tray, and root barrier layer are lifted using a lifting device to expose the inside of the planting base, which facilitates internal cleaning, maintenance, and other operations.
[0024] In this invention, as rainfall increases, due to the limited diameter of the drain pipe, rainwater gradually accumulates in the ditch, causing the water level to rise. The height difference between the drain pipe opening and the trough acts as a buffer zone. When the water level is between these levels, the rainwater first accumulates in the ditch and is gradually drained by the drain pipe. After the planting soil layer is fully absorbed by the rainwater, the rainwater drips into the planting base after passing through the filter plate, drainage tray, and root barrier layer. The bottom surface of the planting base has the same inclination angle as the ditch. The rainwater in the planting base flows into the ditch through the channel and trough, and together with the water in the ditch, flows into the drain pipe. This can effectively and promptly drain excess rainwater from the planting soil layer, preventing the accumulation of rainwater that cannot be absorbed by the plants, which could lead to root rot and other problems.
[0025] In this invention, when the water level in the ditch exceeds the water tank, the rainwater exceeds the processing capacity of the drain pipe and flows into the planting base for temporary storage. The water level in the planting base rises as the rainwater accumulates. Each planting base can store a large amount of rainwater, effectively alleviating the load on the urban drainage system when rainfall is heavy, buying buffer time for the drainage system, and achieving the goal of sponge city construction.
[0026] In this invention, when the water level in the planting base exceeds the water level cylinder, it reaches the maximum water storage state. The continued rise in water level will cause rainwater to flow into the second drain pipe through the drainage channel and be discharged into the city's sewer system together with the water in the drain pipe. This provides a buffer time for the drainage system and unloads the water in time after the load exceeds the limit.
[0027] In this invention, the filter plate, drainage tray, root barrier layer, and planting soil layer are supported by the support frame and the support top plate. With multiple support points, deformation of the filter plate, drainage tray, root barrier layer, and planting soil layer is avoided, thus maintaining a sufficient service life. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0029] Figure 2 This is a schematic diagram of the planting base in this invention;
[0030] Figure 3 This is a schematic diagram of the filter plate structure in this invention;
[0031] Figure 4 This is a schematic diagram of the trench structure in this invention;
[0032] Figure 5 This is a schematic diagram of the cover plate in this invention;
[0033] Figure 6 This is the present invention. Figure 2 A magnified structural diagram of point A in the middle.
[0034] In the diagram, the correspondence between the component names and the attached drawing numbers is as follows: 1. Planting base; 2. Trench; 3. Planting soil layer; 4. Drainage pipe; 5. Filter plate; 6. Slot; 7. Through groove; 8. Support frame; 9. Slot seat; 10. Water level cylinder; 11. Support rod; 12. Water level column; 13. Support top plate; 14. Sleeve; 15. Drainage trough; 16. Leakage trough two; 17. Sealing plate; 18. Mounting groove; 19. Rectangular mounting ring; 20. Water trough; 21. Drainage pipe one; 22. Drainage pipe two; 23. Connecting pipe; 24. Circular groove; 25. Screw rod; 26. Drainage tray; 27. Root barrier layer; 28. Insert post; 29. Limiting plate; 30. Cover plate; 31. Connecting locking ring; 32. Collection hopper; 33. Short rod; 34. Leakage trough one. Detailed Implementation
[0035] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.
[0036] Please see Figures 1-6 This invention provides a water storage and drainage structure for sponge city roads, including a planting base 1. The planting base 1 is a dish-shaped structure with a grooved upper surface and outward expansion at the bottom on both sides. A support mechanism is provided inside the planting base 1, and a ditch mechanism is provided on both sides of the planting base 1. The support mechanism includes a filter plate 5, a drainage tray 26, a root barrier layer 27, and four support frames 8. The ditch mechanism includes a trench 2 and a sealing plate 17. A rectangular mounting groove 18 is provided on the sealing plate 17, and a [missing information - likely a device or structure] is provided in the mounting groove 18. The blocking mechanism includes a rectangular mounting ring 19 and a cover plate 30. A drain pipe 4 is provided below the groove 2. A water trough 20 runs through the surface of the groove 2 facing the planting base 1. Three equally spaced drainage grooves 34 are opened in the middle part of the inner bottom surface of the planting base 1. A strip-shaped drainage trough 15 is opened inside the middle part of the planting base 1. A drainage groove 16 is opened at the front end of the middle part of the bottom surface of the planting base 1. Through grooves 7 run through the left and right sides of the front end of the inner wall of the planting base 1. The water trough 20 is connected to the through groove 7.
[0037] The planting base 1 has four equidistant slots 6 on its left and right inner walls. The slots 6 penetrate the upper surface of the planting base 1. Each slot 34 has a sleeve 14 fixedly connected to its upper opening. Each sleeve 14 has a water level cylinder 10 fixedly fitted on it. Each water level cylinder 10 has four equidistant water level columns 12 fixedly connected to its upper end. Each water level column 12 on the same water level cylinder 10 has a support plate 13 fixedly connected to its upper end. Each support frame 8 has a card seat 9 fixedly connected to both ends. The eight card seats 9 are movably engaged in the eight slots 6. The four support frames 8 and the three support plates 13 are flush. Each support frame 8 has a support rod 11 fixedly connected to its bottom surface. Each support rod 11 is in contact with the inner bottom surface of the planting base 1. The upper surface of the card seat 9 is flush with the upper surface of the planting base 1. Each slot 34 and slot 16 is connected to the drainage channel 15.
[0038] The filter plate 5, drain tray 26, and root barrier layer 27 have the same area and thickness and are attached sequentially from top to bottom. Circular grooves 24 are formed at the four corners of the filter plate 5 and drain tray 26. Inserts 28 are fixedly connected to the four corners of the upper surface of the root barrier layer 27. Each insert 28 has a threaded groove on its upper surface. The four inserts 28 are movably fitted into the four circular grooves 24 on the filter plate 5 and drain tray 26, respectively. The upper ends of the four inserts 28 are flush with the upper surface of the filter plate 5. Each threaded groove contains... A screw 25 with a pull ring is threaded onto the filter plate 5. The bottom of the pull ring on the screw 25 is pressed against the upper surface of the filter plate 5. When the filter plate 5, the drainage tray 26, and the root barrier layer 27 are attached from top to bottom, the filter plate 5, the drainage tray 26, and the root barrier layer 27 are all attached to the inner wall of the planting base 1. The bottom surface of the root barrier layer 27 is attached to the support frame 8 and the support top plate 13. The area between the upper surface of the filter plate 5 and the inner wall of the planting base 1 is filled with planting soil layer 3, and municipal green plants are planted on the planting soil layer 3.
[0039] The left end of the drainage pipe 4 is a bend. A connecting pipe 23 is fixedly connected to the middle section of the drainage pipe 4. A drain pipe 21 is fixedly connected to the bottom of the end of the trench 2 furthest from the installation groove 18. The bottom of the drain pipe 21 is fixedly sleeved with the bend end of the drainage pipe 4. A drain pipe 22 is fixedly sleeved at the bottom of the second drainage trough 16. The entire device is installed between the motor vehicle lane and the non-motor vehicle lane of an urban road as a buffer zone. The trenches 2 on both sides of the planting base 1 are used to collect rainwater from the motor vehicle lane and the non-motor vehicle lane, respectively. Rainwater flows into the trench 2 through the cover plate 30 and flows along the trench 2 into the drain pipe 21. One side of the drain pipe 21 is two centimeters lower than the side of the cover plate 30, allowing water to flow into the drain pipe 21. This design can be laid normally on flat ground and downhill roads. On uphill roads, simply reverse the orientation of the planting base 1 and the trench 2. It is suitable for frequent drainage and has high applicability. No structural changes are required. The upper end of the drain pipe 22 and the connecting pipe 23 are fixedly connected. The other end of the drain pipe 4 is connected to the sewer line. The rectangular mounting ring 19 is fixedly installed in the mounting groove 18. Two pairs of limiting plates 29 are fixedly connected to the bottom surface of the rectangular mounting ring 19. The limiting plates 29 exceed the inner wall of the rectangular mounting ring 19 but do not exceed the outer wall of the rectangular mounting ring 19. The cover plate 30 abuts against the upper surface of the four limiting plates 29. The cover plate 30 is movably locked in the rectangular mounting ring 19. The bottom of the rectangular mounting ring 19 and the cover plate 30 away from the drain pipe 4 are both fixedly connected to the connecting locking ring 31. A metal chain is fixedly connected between the connecting locking rings 31. Two sets of short rods 33 are also fixedly connected to the bottom surface of the cover plate 30. A triangular collection hopper 32 is fixedly connected to the bottom of the short rods 33. The bottom and side wall of the collection hopper 32 are provided with leakage holes.
[0040] As rainfall increases, due to the limited diameter of the drain pipe 21, rainwater gradually accumulates in the ditch 2, causing the water level to rise. The height difference between the drain pipe 21 opening and the trough 20 acts as a buffer zone. When the water level is between these levels, rainwater first accumulates in the ditch 2 and is gradually drained through the drain pipe 21. After the planting soil layer 3 is fully absorbed by the rainwater, the rainwater drips into the planting base 1 after passing through the filter plate 5, drainage tray 26, and root barrier layer 27. The bottom surface of the planting base 1 is flush with the ditch. With the same inclination angle, rainwater in the planting base 1 flows through the channel 7 and water trough 20 to the trench 2, and together with the water in the trench 2, flows into the drain pipe 21. This can effectively and promptly drain excess rainwater discharged from the planting soil layer 3, preventing the accumulation of rainwater in the planting soil layer 3 that cannot be absorbed by the plants, which can lead to root rot and other consequences. The diameter of the drain pipe 21 is smaller than that of the drain pipe 22. When the drain pipe 21 is fully loaded, the drain pipe 4 is not fully loaded and can continue to receive the water flowing in from the drain pipe 22.
[0041] Working principle: When in use, the entire device is installed between the motor vehicle lane and the non-motor vehicle lane of the city road as a separation strip. The trenches 2 on both sides of the planting base 1 are used to collect rainwater from the motor vehicle lane and the non-motor vehicle lane respectively. The rainwater flows into the trench 2 through the cover plate 30 and flows into the drain pipe 21 along the trench 2. The height of one side of the drain pipe 21 is two centimeters lower than the side of the cover plate 30 so that the water can flow into the drain pipe 21. This design can be laid normally on flat ground and downhill roads. On uphill roads, it is only necessary to reverse the direction of the planting base 1 and the trench 2 to drain normally. It has high applicability and does not require separate structural changes.
[0042] Debris on the road is blocked on the surface by the cover plate 30 and can be cleaned by sanitation workers. Small impurities mixed with rainwater flow into the cover plate 30 and are filtered by the collection hopper 32. Rainwater with low impurity content flows into the ditch 2, while impurities remain in the collection hopper 32. Sanitation workers can periodically pull out the cover plate 30 through the rectangular mounting ring 19, and the collection hopper 32 moves out with the cover plate 30. The collection hopper 32 has a scoop-shaped structure, which makes it easy to pour out impurities. The chain between the two connecting locking rings 31 is used for the anti-theft protection of the cover plate 30. The bucket-shaped collection hopper 32 allows impurities to accumulate at the rear end of the collection hopper 32 under the flushing of rainwater as more and more impurities are collected, which prevents the collection hopper 32 from being blocked over a large area and affecting the water leakage effect, effectively extending the time interval for sanitation workers to clean the collection hopper 32.
[0043] Under normal circumstances, the screw 25 is buried in the planting soil layer 3, and the entire device has no obvious appearance features that distinguish it from traditional green belts, so it does not affect the aesthetics. When it is necessary to open the planting base 1 for internal cleaning, maintenance, or other operations, the soil layers at the four corners can be removed to expose the ring at the top of the screw 25. A rope is tied to the ring on the screw 25, and then the filter plate 5, drainage tray 26, and root barrier layer 27 are lifted using lifting equipment to expose the interior of the planting base 1, which facilitates internal cleaning, maintenance, and other operations. When the rainfall increases, due to the limited diameter of the drain pipe 21, rainwater gradually accumulates in the ditch 2, and the water level continues to rise. The height difference between the pipe opening and the water trough 20 serves as a buffer zone. When the water level is between these levels, rainwater first accumulates in the ditch 2 and is gradually drained through the drain pipe 21. After the planting soil layer 3 is fully absorbed by the rainwater, the rainwater drips into the planting base 1 after passing through the filter plate 5, the drainage tray 26, and the root barrier layer 27. The bottom surface of the planting base 1 has the same inclination angle as the ditch 2. The rainwater in the planting base 1 flows to the ditch 2 through the channel 7 and the water trough 20, and together with the water in the ditch 2, flows into the drain pipe 21 through the ditch 2. This can effectively and promptly drain excess rainwater discharged from the planting soil layer 3, preventing the accumulation of rainwater in the planting soil layer 3 that cannot be absorbed by the plants, which could lead to root rot and other consequences for the plants.
[0044] When the water level in the ditch 2 exceeds the water tank 20, the rainwater exceeds the processing capacity of the drain pipe 21. The rainwater flows into the planting base 1 for temporary storage. The water level in the planting base 1 rises as the rainwater accumulates. Each planting base 1 can store a large amount of rainwater, effectively alleviating the load on the urban drainage system when the rainfall is heavy, buying buffer time for the drainage system, and achieving the goal of sponge city construction.
[0045] When the water level in the planting base 1 exceeds the water level cylinder 10, it reaches the maximum water storage state. The continued rise in water level will cause rainwater to flow into the drain pipe 22 through the drainage channel 15, and be discharged into the urban sewer system together with the water in the drainage pipe 4. While giving the drainage system a buffer time, it will unload in time after exceeding the load range. The filter plate 5, drainage tray 26, root barrier layer 27 and planting soil layer 3 are supported by the support frame 8 and the support top plate 13. With multiple support points, the filter plate 5, drainage tray 26, root barrier layer 27 and planting soil layer 3 are prevented from deforming, thus maintaining a sufficient service life.
[0046] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.
Claims
1. A water storage and drainage structure for sponge city roads, characterized in that: It includes a planting base (1), which is a dish-shaped structure with a grooved upper surface and outward expansion of the bottom on both sides. A support mechanism is provided inside the planting base (1), and a ditch mechanism is provided on both sides of the planting base (1). The support mechanism includes a filter plate (5), a drainage tray (26), a root barrier layer (27), and four support frames (8). The ditch mechanism includes a ditch (2) and a sealing plate (17). A rectangular mounting groove (18) is provided on the sealing plate (17). A blocking mechanism is provided in the mounting groove (18). The blocking mechanism includes a rectangular mounting ring (19) and a cover plate (30). A drainage pipe (4) is provided below the ditch (2). A water trough (20) runs through the surface of the ditch (2) facing the planting base (1). The planting base (1) has three equally spaced drainage grooves (34) in the middle part of the inner bottom surface. The planting base (1) has a strip-shaped drainage groove (15) inside the middle part of the planting base (1). The planting base (1) has a drainage groove (16) at the front end of the middle part of the bottom surface. The planting base (1) has through grooves (7) on both the left and right sides of the front end of the inner wall of the planting base (1). The water trough (20) is connected to the through groove (7). The planting base (1) has four equally spaced slots (6) on its left and right inner walls. The slots (6) penetrate the upper surface of the planting base (1). Each slot (34) has a sleeve (14) fixedly connected to its upper slot opening. Each sleeve (14) is fixedly fitted with a water level cylinder (10), and each water level cylinder (10) is fixedly connected to four equidistant water level columns (12) at its upper end. The upper ends of the four water level columns (12) on the same water level cylinder (10) are fixedly connected to a supporting top plate (13). Each of the first (34) and second (16) drain channels is connected to the drainage channel (15); The left end of the drain pipe (4) is a bend, and the middle part of the drain pipe (4) is fixedly connected to the connecting pipe (23). The bottom of the trench (2) away from the installation groove (18) is fixedly connected to the drain pipe (21), and the bottom of the drain pipe (21) is fixedly sleeved with the bend end of the drain pipe (4). The bottom of the second drain trough (16) is fixedly connected to the second drain pipe (22), the second drain pipe (22) is fixedly connected to the upper end of the connecting pipe (23), and the other end of the drain pipe (4) is connected to the sewer line.
2. The water storage and drainage structure for sponge city roads as described in claim 1, characterized in that, Each support frame (8) has a card seat (9) fixedly connected to both ends. The eight card seats (9) are movably engaged in the eight card slots (6). The four support frames (8) and the three support top plates (13) are flush. Each support frame (8) has a support rod (11) fixedly connected to the bottom surface. Each support rod (11) is in contact with the bottom surface of the planting base (1). The upper surface of the card holder (9) is flush with the upper surface of the planting base (1).
3. The water storage and drainage structure for sponge city roads as described in claim 2, characterized in that, The filter plate (5), drainage tray (26), and root barrier layer (27) have the same area and thickness and are attached sequentially from top to bottom; Among them, the filter plate (5) and the drain tray (26) are provided with round grooves (24) at the four corners, and the root barrier layer (27) is fixedly connected with the four corners of the upper surface of the four corners. Each of the four corners of the filter plate (5) and the drain tray (26) is provided with a threaded groove. The four corners of the four corners of the filter plate (5) and the drain tray (26) are respectively movably connected to the four round grooves (24). The upper ends of the four corners of the four corners of the filter plate (5) are flush with the upper surface of the filter plate (5). Each threaded groove is threaded with a screw (25) with a pull ring. The bottom of the pull ring on the screw (25) is pressed against the upper surface of the filter plate (5).
4. The water storage and drainage structure for sponge city roads as described in claim 3, characterized in that, When the filter plate (5), drainage tray (26), and root barrier layer (27) are attached from top to bottom, the filter plate (5), drainage tray (26), and root barrier layer (27) are attached to the inner wall of the planting base (1) on all four sides, and the bottom surface of the root barrier layer (27) is attached to the support frame (8) and the support top plate (13). Among them, the area between the upper surface of the filter plate (5) and the inner wall of the planting base (1) is filled with planting soil (3), and municipal green plants are planted on the planting soil (3).
5. The water storage and drainage structure for sponge city roads as described in claim 4, characterized in that, A rectangular mounting ring (19) is fixedly installed in the mounting groove (18). Two pairs of limiting pieces (29) are fixedly connected to the bottom surface of the rectangular mounting ring (19). The limiting pieces (29) extend beyond the inner wall of the rectangular mounting ring (19) but do not extend beyond the outer wall of the rectangular mounting ring (19). The cover plate (30) abuts against the upper surface of the four limiting pieces (29). The cover plate (30) is movably locked inside the rectangular mounting ring (19). Among them, the bottom of the rectangular mounting ring (19) and the cover plate (30) away from the drain pipe (4) are both fixedly connected to the connecting lock ring (31), and a metal chain is fixedly connected between the connecting lock rings (31).
6. The water storage and drainage structure for sponge city roads as described in claim 5, characterized in that, Two sets of short rods (33) are fixedly connected to the bottom surface of the cover plate (30), and a triangular collection hopper (32) is fixedly connected to the bottom of the short rods (33). The bottom and side walls of the collecting hopper (32) are provided with leakage holes.