A rainwater garden suitable for sponge city modular construction
By installing permeable pipes, overflow boxes, and overflow pipe structures in rain gardens, the problems of slow drainage and water accumulation in rain gardens during the rainy season are solved, achieving efficient rainwater discharge and utilization, and improving the drainage capacity and rainwater utilization rate of rain gardens.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 广州市花木建设集团有限公司
- Filing Date
- 2023-11-16
- Publication Date
- 2026-06-05
AI Technical Summary
During the rainy season, the soil structure of a rain garden can easily become saturated, causing rainwater to infiltrate slowly, accumulate, or overflow onto the ground, affecting drainage capacity.
The rain garden is equipped with permeable pipes, overflow boxes, and overflow pipes. The permeable pipes have permeable holes at the top, and the overflow boxes are connected to the municipal stormwater network. Rainwater enters the permeable pipes through the permeable holes and flows into the overflow boxes. The rainwater in the overflow boxes can be discharged into the municipal stormwater network through the overflow pipes. The top of the overflow boxes can be detachably connected to a grating cover to prevent debris from entering. The filter plates are set at an angle to filter debris. The ends of the permeable pipes can be plugged with sealing blocks to block or connect them. Water-absorbing sponge strips are used for irrigation during the non-rainy season.
It improves the drainage capacity of the rain garden, reduces rainwater accumulation and backflow, increases rainwater utilization, extends the retention time of irrigation water, and prevents filter plate clogging and drainage pipe siltation.
Smart Images
Figure CN117306658B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of rain gardens, and more particularly to a rain garden suitable for modular construction of sponge cities. Background Technology
[0002] Rain gardens are an important component of sponge cities. They mainly refer to shallow, artificially excavated green spaces with various green plants planted on their surface. Rain gardens are primarily used to collect and absorb rainwater from the ground surface and allow it to seep into the ground to replenish groundwater resources.
[0003] Regarding the aforementioned technologies, during periods of heavy rainfall, such as the rainy season, the soil structure of rain gardens can easily become saturated after absorbing water, resulting in slow rainwater infiltration and causing rainwater to accumulate or even overflow onto the ground. Therefore, there is room for improvement. Summary of the Invention
[0004] In order to improve the drainage capacity of rain gardens and reduce the situation where rainwater easily accumulates or even flows back to the ground during heavy rainfall, this application provides a rain garden suitable for modular construction of sponge cities.
[0005] This application provides a rain garden suitable for modular construction of sponge cities, employing the following technical solution:
[0006] A rain garden suitable for modular construction in sponge cities includes a foundation trench excavated in the ground, the foundation trench being filled with a soil structure layer, the surface of the soil structure layer being planted with a green layer, and a drainage structure component buried at the bottom of the soil structure layer. The drainage structure component includes several parallel permeable pipes, each with several permeable holes on its top wall. Overflow boxes are installed at both ends of the drainage structure component, and the overflow boxes are buried in the foundation trench. The two ends of each permeable pipe are respectively connected to two sets of overflow boxes. An overflow pipe is connected to the top of each overflow box and is connected to the municipal rainwater pipe network. The overflow box is also connected to an outlet pipe, and a water pump is installed on the outlet pipe.
[0007] By adopting the above technical solution, during rainy days, rainwater not only infiltrates into the ground through the soil structure layer, but also flows into the permeable pipe through several permeable holes on the permeable pipe. Then, it flows into the overflow box through the permeable pipe. When the rainwater level in the overflow box rises to the overflow pipe, the rainwater can be discharged into the municipal stormwater pipe network through the overflow pipe. Compared with the traditional rain garden structure, this is beneficial to further improve the drainage capacity of the rain garden. At the same time, the rainwater flowing into the overflow box can be temporarily stored in the overflow box for subsequent irrigation water for the rain garden. When the rainwater in the overflow box needs to be used later, it can be pumped out of the overflow box to the outlet pipe by a water pump.
[0008] Preferably, the top of the overflow box extends to the surface of the soil structure layer and the top of the overflow box is provided with an opening, and a grid cover can also be detachably connected to the top opening of the overflow box.
[0009] By adopting the above technical solution, rainwater on the surface of the soil structure layer can flow into the overflow box through the opening at the top of the overflow box during rainy days. This helps to further improve the drainage capacity of the rain garden and reduce the accumulation of rainwater on the surface of the soil structure layer or even backflow onto the ground when the rainfall is too heavy. The grating cover can be used to seal the opening, reducing the chance of pedestrians accidentally stepping into the overflow channel. At the same time, the grating cover can also prevent some large pieces of garbage and debris from falling into the overflow box.
[0010] Preferably, a filter plate is also mounted on the top of the overflow box; the filter plate is located above the overflow pipe and is inclined downward.
[0011] By adopting the above technical solution, the rainwater flowing in from the top opening of the overflow box is further filtered through the filter plate, which limits the falling of small debris such as leaves and stones into the overflow box and prevents blockage of the outlet pipe and overflow pipe. By setting the filter plate at an angle downwards, the debris filtered by the filter plate can be flushed to the lower end of the filter plate by the subsequent rainwater, which helps to delay the situation where the filter plate is filled with garbage and debris, causing the filter holes to become blocked and affecting the passage of rainwater.
[0012] Preferably, a connecting rod is provided between the grid cover and the filter plate, and the two ends of the connecting rod are respectively connected to the grid cover and the filter plate.
[0013] By adopting the above technical solution, the filter plate can be stably installed in the overflow box. At the same time, when the grid cover is removed from the opening of the overflow box, the grid cover can be used to bring the filter plate out of the overflow box through the connecting rod, which facilitates the cleaning of the impurities filtered out of the filter plate.
[0014] Preferably, sealing blocks are coaxially inserted at both ends of the permeable pipe, and a connecting rope is provided between the two sets of sealing blocks. The two ends of the connecting rope are respectively connected to the opposite side of the two sets of sealing blocks, and the length of the connecting rope is longer than the length of the permeable pipe.
[0015] By adopting the above technical solution, during periods of low rainfall, such as the non-rainy season, two sets of sealing blocks are inserted into both ends of the permeable pipe to seal the pipe openings, reducing the amount of irrigation water flowing into the overflow box and extending the residence time of irrigation water in the soil structure layer. During the rainy season, the sealing blocks at both ends of the permeable pipe are removed, connecting each end of the pipe to one of the two overflow boxes, allowing rainwater from the soil structure layer to flow into the overflow boxes. The connecting rope allows for precise positioning of the sealing blocks at both ends of the permeable pipe, ensuring that the blocks can be suspended inside the overflow boxes after being removed from the pipe ends.
[0016] Preferably, each of the sealing blocks is connected to a limiting rope on the side opposite to the connecting rope, and the end of the limiting rope away from the sealing block is connected to the inner wall of the overflow tank. The length of the limiting rope is longer than the length of the permeable pipe.
[0017] By adopting the above technical solution, the two sets of sealing blocks are removed from one end of the permeable pipe. The sludge and impurities accumulated in the permeable pipe can be carried out by the sealing blocks, thus cleaning the permeable pipe. By setting the limiting rope, after the two sets of sealing blocks are removed from one end of the permeable pipe, the set of sealing blocks closest to the permeable pipe is inserted into the opening of the permeable pipe, and the limiting rope of the set of sealing blocks is pulled until the two sets of sealing blocks are located at the two ends of the permeable pipe, thus realizing the reset of the two sets of sealing blocks.
[0018] Preferably, a number of support pipes are also buried in the soil structure layer. The two ends of the support pipes are respectively connected to the two sets of overflow boxes. A number of long through holes are opened around the top of the support pipes. Water-absorbing sponge strips are inserted into the support pipes. The two ends of the water-absorbing sponge strips extend into the two sets of overflow boxes.
[0019] By adopting the above technical solution, during the non-rainy season, the water-absorbing sponge strip can absorb and release the rainwater collected in the overflow box into the soil structure layer to irrigate the plants in the planting layer, which helps to improve the utilization rate of the rainwater collected in the overflow box.
[0020] Preferably, a limiting ring is provided on the inner wall of the overflow box near the support pipe, corresponding to the water-absorbing sponge strip. The limiting ring is located at the bottom of the overflow box and is used for the water-absorbing sponge strip to pass through.
[0021] By adopting the above technical solution, one end of the water-absorbing sponge strip inside the overflow box is inserted into the corresponding limiting ring, so that the water-absorbing sponge strip can extend to the bottom of the overflow box and better absorb the rainwater at the bottom of the overflow box.
[0022] In summary, this application includes at least one of the following beneficial technical effects:
[0023] 1. During rainy days, rainwater can seep into the ground through the soil structure layer, and also flow into the permeable pipe through the permeable holes above the permeable pipe. Then, it flows into the overflow box through the permeable pipe. Excess rainwater in the overflow box can be discharged into the municipal stormwater pipe network through the overflow pipe, which helps to improve the drainage capacity of the rain garden structure and reduce the occurrence of water accumulation or even backflow on the surface of the rain garden.
[0024] 2. By setting the filter plate at an angle downwards, the garbage and debris filtered out by the filter plate can flow to the lower end of the filter plate under the wash of rainwater, so that the mesh on the filter plate is not easily filled with garbage and debris and blocked.
[0025] 3. A sealing block is coaxially inserted at both ends of the permeable pipe. The sealing blocks are connected by a connecting rope, the length of which is longer than the length of the permeable pipe. During the rainy season, the two sets of sealing blocks are removed from the opening of the permeable pipe to allow rainwater in the soil structure layer to flow into the overflow box. During the non-rainy season, the two sets of sealing blocks are inserted into both ends of the permeable pipe to seal it, extending the residence time of water in the soil structure layer. After removing the two sets of sealing blocks from both ends of the permeable pipe using the connecting rope, the two permeable pipes can be suspended in two overflow boxes for easy storage of the sealing blocks. The two sets of sealing blocks can also be removed from one end of the permeable pipe using the connecting rope for cleaning the inside of the permeable pipe. Attached Figure Description
[0026] Figure 1 This is a schematic diagram illustrating the soil structure layers of a rain garden, as shown in the embodiments of this application.
[0027] Figure 2 This is a schematic diagram illustrating the internal structure of a rain garden, as shown in the embodiments of this application.
[0028] Figure 3 yes Figure 2 Enlarged schematic diagram of part A in the middle.
[0029] Figure 4 This is a diagram illustrating the connection relationship between the grid cover and the filter plate in an embodiment of this application.
[0030] Figure 5 yes Figure 2 Enlarged schematic diagram of section B.
[0031] Figure 6 yes Figure 2 Enlarged schematic diagram of section B.
[0032] Explanation of reference numerals in the attached figures:
[0033] 1. Foundation trench; 2. Soil structure layer; 21. Crushed stone layer; 22. Sand layer; 23. Planting soil layer; 24. Pebble layer; 3. Green plant layer; 4. Permeable pipe; 41. Permeable hole; 42. Sealing block; 43. Connecting rope; 44. Limiting rope; 45. Fixing ring; 5. Overflow box; 51. Grille cover; 52. Outlet pipe; 53. Water pump; 54. Filter plate; 55. Annular baffle; 56. Connecting rod; 6. Support pipe; 60. Long through hole; 61. Water-absorbing sponge strip; 62. Limiting ring. Detailed Implementation
[0034] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.
[0035] This application discloses a rain garden suitable for modular construction of sponge cities, referring to... Figure 1 and Figure 2 The structure includes a foundation trench 1 located on the ground, a soil structure layer 2 filled in the foundation trench 1, the surface of the soil structure layer 2 being set below the ground level, and a green layer 3 planted on top of the soil structure layer 2; the soil structure layer 2 is also equipped with drainage structure components, including several horizontally arranged permeable pipes 4, several permeable holes 41 opened along the length of the permeable pipes 4, overflow boxes 5 being set at both ends of the drainage structure components, the two ends of the permeable pipes 4 being connected to two overflow boxes 5 respectively, the top of the overflow box 5 being connected to an overflow pipe, and the end of the overflow pipe away from the overflow box 5 being connected to the municipal rainwater pipe network.
[0036] Rainwater can infiltrate into the ground through the soil structure layer 2, and also flow into the permeable pipe 4 through several permeable holes 41. Then, it flows through the permeable pipe 4 to the two sets of overflow boxes 5. When the rainwater level in the overflow box 5 rises to the point where the overflow pipe connects to the overflow box 5, the rainwater in the overflow box 5 can be discharged into the municipal rainwater pipe network through the overflow pipe, which can further improve the drainage capacity of the rain garden and reduce the situation where rainwater accumulates on the surface of the soil structure layer 2 when the rainfall is large.
[0037] The soil structure layer 2 consists of, from bottom to top, a gravel layer 21, a sand layer 22, a planting soil layer 23, and a pebble layer 24. The plants in the green plant layer 3 are planted within the planting soil layer 23. The main plants in the green plant layer 3 are irises, celandine, and dwarf pampas grass. Several permeable pipes 4 are buried on top of the gravel layer 21.
[0038] The bottom of the overflow box 5 is also connected to a water outlet pipe 52. The end of the water outlet pipe 52 away from the overflow box 5 extends vertically downward to the ground. A water pump 53 is installed on the water outlet pipe 52. With the above settings, it is convenient to use the water pump 53 to pump out the rainwater in the overflow box 5 for irrigation of the planting layer plants, which helps to improve the utilization rate of rainwater.
[0039] Reference Figure 2 and Figure 3The overflow box 5 extends to the soil planting surface at its top. An opening is provided at the top of the overflow box 5, and a grid cover 51, shaped like a truncated pyramid with its pointed end facing upwards, is also provided on the top of the overflow box 5 to seal the opening. An annular stepped groove is formed around the opening at the top of the overflow box 5, and the bottom of the grid cover 51 overlaps within this groove, allowing the grid cover 51 to be detachably connected to the top of the overflow box 5. Through this design, the grid cover 51 can seal the opening of the overflow box 5, reducing the risk of pedestrians accidentally stepping into the overflow box 5. Simultaneously, some rainwater flowing into the soil structure layer 2 can be channeled into the overflow box 5 through the grid cover 51, further improving the drainage speed of the rain garden structure.
[0040] Reference Figure 3 and Figure 4 The overflow box 5 is also equipped with a filter plate 54, which is inclined downwards with its lower inclined end facing the inner wall of the overflow box 5 away from the permeable pipe 4. This facilitates the filtering of garbage and debris carried by rainwater flowing in through the grille cover 51, reducing the accumulation of garbage and debris in the overflow box 5. Because the filter plate 54 is inclined downwards, the garbage filtered by the filter plate 54 can flow to the lower inclined end of the filter plate 54 under the flushing of subsequent rainwater, delaying the clogging of the filter holes caused by garbage accumulation and the impact on the passage of rainwater through the filter plate 54.
[0041] A connecting rod 56 is provided between the filter plate 54 and the grid cover 51. The two ends of the connecting rod 56 are fixedly connected to the opposite sides of the filter plate 54 and the grid cover 51, respectively. With this arrangement, the filter plate 54 can be installed inside the overflow box 5. At the same time, when the grid cover 51 is subsequently removed from the top of the overflow box 5, the grid cover 51 can bring the filter plate 54 out of the overflow box 5 together with it via the connecting rod 56, making it easy to clean the filtered garbage and debris on the filter plate 54. An annular baffle 55 is provided around the outer periphery of the filter plate 54 and is fitted into the inner circumference of the overflow box 5. The annular baffle 55 prevents the filtered garbage on the filter plate 54 from slipping off when the filter plate 54 is subsequently removed from the overflow box 5.
[0042] Reference Figure 2 and Figure 5Both ends of the permeable pipe 4 are coaxially connected to sealing blocks 42. With the above settings, during the rainy season, the sealing blocks 42 at both ends of the permeable pipe 4 can be removed from both ends of the permeable pipe 4. At this time, both ends of the permeable pipe 4 are connected to two sets of overflow boxes 5 respectively, so that the rainwater that infiltrates into the soil structure layer 2 can flow into the permeable pipe 4 through the permeable hole 41 and then into the overflow boxes 5 at both ends through the permeable pipe 4. This is beneficial to improve the drainage speed of the soil structure layer 2 of the rain garden. During the non-rainy season, the two sets of sealing blocks 42 are inserted into the sealing pipe to seal the opening of the sealing pipe. This reduces the amount of rainwater and irrigation water that flows into the overflow box 5 through the permeable pipe 4 during the non-rainy season, which would cause the soil structure layer 2 to lose water too quickly and result in the need for frequent watering of the plants in the planting layer.
[0043] Two sealing blocks 42 are connected by connecting ropes 43 on opposite sides. The connecting ropes 43 are longer than the permeable pipe 4. Both ends of the connecting ropes 43 are connected to opposite sides of the two sealing blocks 42. By using the connecting ropes 43, after the two sets of sealing blocks 42 are removed from both ends of the permeable pipe 4, the two sets of sealing blocks 42 can be suspended in the two overflow boxes 5 by the connecting ropes 43, which can temporarily store the sealing blocks 42 and reduce the loss of the sealing blocks 42. At the same time, the two sets of sealing blocks 42 can also be removed from one end of the permeable pipe 4 by the connecting ropes 43. During the movement of the two sets of sealing blocks 42 along the length of the permeable pipe 4, the silt and other impurities accumulated on the inner circumference of the permeable pipe 4 can be carried out with it, which can clean and dredge the permeable pipe 4.
[0044] Reference Figure 5 and Figure 6 Each of the two sets of sealing blocks 42 is connected to a limiting rope 44 on one side. A fixing ring 45 is connected to the top of the inner wall of the overflow port away from the permeable pipe 4, corresponding to the limiting rope 44. The fixing ring 45 is located below the filter plate 54. The end of the limiting rope 44 away from the sealing block 42 is connected to the fixing ring 45 to realize the connection between the limiting rope 44 and the overflow box 5. The length of the limiting rope 44 is longer than the length of the permeable pipe 4 and is sufficient to allow the two sets of sealing blocks 42 to be moved out from one end of the permeable pipe 4. With the above settings, after the two sets of sealing blocks 42 are moved out from one end of the permeable pipe 4, the sealing block 42 that is close to the permeable pipe 4 can be reinserted into the permeable pipe 4. The sealing block 42 is then pulled back to the other end of the permeable pipe 4 by the limiting rope 44 connected to it, so as to realize the reset of the sealing block 42.
[0045] Several U-shaped rods are also installed on the inner wall of one side of the overflow box 5. The U-shaped rods and the water permeable pipe 4 are located on the inner wall adjacent to the overflow box 5. Both ends of the U-shaped rods are fixed to the inner wall of the overflow box 5. Several U-shaped rods are evenly distributed along the height direction of the overflow box 5, and the topmost U-shaped rod is located below the filter plate 54. Subsequent operators can use several U-shaped rods to travel back and forth between the overflow box 5 and the ground.
[0046] Reference Figure 2 and Figure 6 Several horizontally arranged support pipes 6 are also buried in the soil structure layer 2, all located within the planting soil layer 23. Several elongated through-holes 60 are formed around the outer periphery of each support pipe 6, with the length of the through-holes 60 parallel to the length of the support pipe 6. Both ends of each support pipe 6 are connected to two sets of overflow boxes 5. Water-absorbing sponge strips 61 are coaxially inserted into each support pipe 6, with both ends extending into the two sets of overflow boxes 5. Through this arrangement, the water-absorbing sponge strips 61 can absorb rainwater from the overflow boxes 5 via capillary action and release it into the planting soil layer 23 through the elongated through-holes 60 on the support pipes 6, thereby irrigating the plants planted in the planting soil layer 23 and improving the utilization rate of rainwater in the overflow boxes 5.
[0047] A limiting ring 62 is fixedly connected to the bottom of the inner wall of the overflow box 5 near the support pipe 6, corresponding to the water-absorbing sponge strip 61. One end of the water-absorbing sponge strip 61 inside the overflow box 5 is inserted into the corresponding limiting ring 62. Through the above arrangement, the water-absorbing sponge strip 61 can extend to the bottom of the overflow box 5, thereby facilitating the absorption of rainwater at the bottom of the overflow box 5.
[0048] The implementation principle of this application embodiment is as follows:
[0049] During the rainy season, the sealing blocks 42 at both ends of the permeable pipe 4 are removed from the permeable pipe 4 so that both ends of the permeable pipe 4 can be connected to two sets of overflow boxes 5 respectively. When rainwater seeps into the ground through the soil structure layer 2, it can also flow into the permeable pipe 4 through the permeable hole 41 above the permeable pipe 4, and then flow into the overflow box 5 through the permeable pipe 4. The excess rainwater in the overflow box 5 can be discharged into the municipal stormwater pipe network through the overflow pipe, which helps to improve the drainage speed of the rain garden. At the same time, if the rainfall is large during the rainy season, it reduces the situation where rainwater accumulates on the surface of the soil structure layer 2 of the rain garden or even flows back to the ground.
[0050] During the non-rainy season, the sealing blocks 42 at both ends of the permeable pipe 4 are inserted into the pipe openings at both ends of the permeable pipe 4 to seal the permeable pipe 4, thereby limiting the flow of subsequent irrigation water through the permeable pipe 4 into the overflow box 5 and extending the residence time of irrigation water in the soil structure layer 2.
[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A rain garden suitable for modular construction of sponge cities, comprising a foundation trench (1) excavated in the ground, wherein the foundation trench (1) is filled with a soil structure layer (2), and a green plant layer (3) is planted on the surface of the soil structure layer (2), characterized in that: The bottom of the soil structure layer (2) is also buried with drainage structure components, which include several parallel permeable pipes (4). The top wall of each permeable pipe (4) is provided with several permeable holes (41). Both ends of the drainage structure components are provided with overflow boxes (5). The overflow boxes (5) are buried in the foundation trench (1). Both ends of the permeable pipe (4) are respectively connected to two sets of overflow boxes (5). The top of the overflow box (5) is connected with an overflow pipe. The overflow pipe is connected to the municipal rainwater pipe network. The overflow box (5) is also connected with an outlet pipe (52). The outlet pipe (52) is equipped with a water pump (53). Both ends of the permeable pipe (4) are coaxially connected to sealing blocks (42), and a connecting rope (43) is provided between the two sets of sealing blocks (42). The two ends of the connecting rope (43) are respectively connected to the opposite side of the two sets of sealing blocks (42), and the length of the connecting rope (43) is longer than the length of the permeable pipe (4).
2. A rain garden suitable for modular construction of sponge cities according to claim 1, characterized in that: The top of the overflow box (5) extends to the surface of the soil structure layer (2) and the top of the overflow box (5) is provided with an opening. A grid cover (51) can also be detachably connected to the top opening of the overflow box (5).
3. A rain garden suitable for modular construction of sponge cities according to claim 2, characterized in that: The overflow box (5) is also equipped with a filter plate (54) on top; the filter plate (54) is located above the overflow pipe and is inclined downward.
4. A rain garden suitable for modular construction of sponge cities according to claim 3, characterized in that: A connecting rod (56) is provided between the grid cover (51) and the filter plate (54), and the two ends of the connecting rod (56) are respectively connected to the grid cover (51) and the filter plate (54).
5. A rain garden suitable for modular construction of sponge cities according to claim 1, characterized in that: Each sealing block (42) is connected to a limiting rope (44) on the side away from the connecting rope (43). The end of the limiting rope (44) away from the sealing block (42) is connected to the inner wall of the overflow box (5). The length of the limiting rope (44) is longer than the length of the permeable pipe (4).
6. A rain garden suitable for modular construction of sponge cities according to any one of claims 1, characterized in that: Several support pipes (6) are also buried in the soil structure layer (2). The two ends of the support pipes (6) are respectively connected to the two sets of overflow boxes (5). Several long through holes (60) are opened around the top of the support pipes (6). Water-absorbing sponge strips (61) are inserted into the support pipes (6). The two ends of the water-absorbing sponge strips (61) extend into the two sets of overflow boxes (5).
7. A rain garden suitable for modular construction of sponge cities according to claim 6, characterized in that: The overflow box (5) has a limiting ring (62) on the inner wall of the side near the support pipe (6) corresponding to the water-absorbing sponge strip (61). The limiting ring (62) is located at the bottom of the overflow box (5) and is used for the water-absorbing sponge strip (61) to pass through.