Rainwater garden system for sponge city

Abstract

The utility model discloses a rainwater garden system for a sponge city, which comprises a foundation pit, a rammed earth layer, a gravel drainage layer, a planting soil compaction layer, a perforated pipe, a backwashing system, an overflow system, a pebble foot protection part and a green plant part, the rammed plain soil layer, the gravel drainage layer and the planting soil compaction layer are sequentially laid in a foundation pit from bottom to top, a pebble foot protection part is laid on the outer edge of the planting soil compaction layer, the perforated pipe is embedded in the gravel drainage layer in the horizontal direction, the lower end of the overflow system communicates with the perforated pipe, and the lower end of the back flushing system communicates with the perforated pipe. The green plant part is arranged at least around the upper end of the backwashing system and the upper end of the overflow system. Through the application of the rainwater garden system, the rainwater garden system with higher working stability is provided, the requirements of sponge cities can be effectively met, and the longer service life of the rainwater garden system is ensured while the functions of seepage, stagnation, drainage and the like of rainwater are better realized.

Description

Technical Field

[0001] The utility model relates to the technical field of rainwater gardens, in particular to a rainwater garden system for sponge cities. Background Art

[0002] In order to further strengthen the flexible management between the urban environment and rainwater, it aims to enable the city to absorb water like a sponge through artificial intervention, so as to effectively control rainwater runoff and achieve natural accumulation, natural infiltration, and natural purification. In the prior art, it is more common to arrange rainwater garden systems in cities to meet the needs of sponge cities. For example, the existing Chinese authorized patent ZL201621306826.1, etc., all provide the ability to store rainwater by using multiple layers of different materials in the vertical direction.

[0003] However, most of the current rain gardens tend to have a relatively simple overall layout and poor working stability. After a long period of use, the external permeability and internal water storage capacity will decrease, and the subsequent maintenance and cleaning are relatively inconvenient. In addition, its improper layout directly affects the appearance of the city, brings certain discomfort to urban residents, and is likely to cause inconvenience to residents' walking due to changes in the terrain. Utility Model Content

[0004] In view of this, in order to solve the above-mentioned problems, the purpose of the utility model is to provide a rainwater garden system for sponge cities, including: a foundation pit, a rammed soil layer, a gravel drainage layer, a compacted planting soil layer, a perforated pipe, a backwashing system, an overflow system, a pebble foot guard and a green plant part. The foundation pit is opened on the ground, and the foundation pit is recessed relative to the ground. The rammed soil layer, the gravel drainage layer and the compacted planting soil layer are sequentially laid in the foundation pit from bottom to top, and the pebble foot guard is laid at the outer edge of the compacted planting soil layer. The perforated pipe is embedded in the gravel drainage layer along the horizontal direction, the lower end of the overflow system is connected to the perforated pipe, and the upper end of the overflow system passes through the compacted planting soil layer and is protruding upward, the lower end of the backwashing system is connected to the perforated pipe, and the upper end of the backwashing system passes through the compacted planting soil layer and is protruding, and the green plant part is at least arranged around the upper end of the backwashing system and the upper end of the overflow system.

[0005] In another preferred embodiment, the planting soil compaction layer includes: an outer plane portion, an inclined portion and an inner plane portion, the outer plane portion, the inclined portion and the inner plane portion are connected in sequence from outside to inside, the horizontal height of the outer plane portion is greater than the horizontal height of the inner plane portion, and the inclined portion is inclined relative to the horizontal plane.

[0006] In another preferred embodiment, the upper end of the overflow system is disposed through the inner plane portion, and the upper end of the backwash system is disposed through the inclined portion.

[0007] In another preferred embodiment, a walkway portion is formed on the inner plane portion, and a permeable imitation stone brick portion is paved on the walkway portion.

[0008] In another preferred embodiment, the outer side of the permeable imitation stone brick portion is paved with a pebble edging portion.

[0009] In another preferred embodiment, a geotextile layer is laid between the rammed soil layer and the gravel drainage layer.

[0010] In another preferred embodiment, an anti-seepage geomembrane layer is laid between the gravel drainage layer.

[0011] In another preferred embodiment, the backwashing system comprises: a backwashing pipe and a pipe cover, the lower end of the backwashing pipe is communicated with the perforated pipe, and the pipe cover is detachably mounted on the upper end of the backwashing pipe.

[0012] In another preferred embodiment, the overflow system comprises: a pipe well and a well cover, wherein the lower end of the pipe well is connected to the perforated pipe, and the well cover is detachably mounted on the upper end of the pipe well, and a plurality of water holes are formed on the well cover.

[0013] In another preferred embodiment, the level of the lower end of the tube well is less than the level of the lower edge of the perforated pipe.

[0014] Due to the adoption of the above technical solution, the utility model has the following positive effects compared with the prior art:

[0015] Through the application of the utility model, a rainwater garden system with strong working stability is provided, which can effectively meet the needs of sponge cities, and while better realizing the functions of infiltration, retention and drainage of rainwater, ensure its own long service life; the utility model has a reasonable structure, is not easy to cause inconvenience to the lives of residents, and can also bring a better visual experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of a rainwater garden system for a sponge city according to the utility model;

[0017] Figure 2 The utility model is a schematic diagram of an external water supply system of a rainwater garden system for a sponge city.

[0018] In the attached figure:

[0019] 1. Foundation pit; 2. Rammed soil layer; 3. Gravel drainage layer; 4. Compacted soil layer; 5. Perforated pipe; 6. Backwash system; 7. Overflow system; 8. Pebble foot guard; 9. Green plant part; 10. External plane part; 11. Inclined part; 12. Internal plane part; 13. Walkway part; 14. Permeable imitation stone brick part; 15. Pebble edging part; 16. Geotextile layer; 17. Anti-seepage geomembrane layer; 18. Backwash pipe; 19. Pipe cover; 20. Pipe well; 21. Manhole cover; 22. Waterproof layer; 23. Building board layer; 24. External water supply system; 25. Water supply pipe; 26. Water storage well; 27. Pumping pipe; 28. Pumping pump; 29. ​​Water delivery pipe; 30. Building. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0021] like Figure 1 As shown, a rainwater garden system for a sponge city in a preferred embodiment is shown, comprising: a foundation pit 1, a rammed soil layer 2, a gravel drainage layer 3, a compacted planting soil layer 4, a perforated pipe 5, a backwashing system 6, an overflow system 7, a pebble foot guard 8 and a green plant part 9. The foundation pit 1 is opened on the ground, and the foundation pit 1 is arranged concave relative to the ground. The rammed soil layer 2, the gravel drainage layer 3 and the compacted planting soil layer 4 are laid in the foundation pit 1 from bottom to top in sequence, and a pebble foot guard 8 is laid at the outer edge of the compacted planting soil layer 4. The perforated pipe 5 is embedded in the gravel drainage layer 3 in a horizontal direction, the lower end of the overflow system 7 is connected to the perforated pipe 5, and the upper end of the overflow system 7 passes through the compacted planting soil layer 4 and is arranged to protrude upward, the lower end of the backwashing system 6 is connected to the perforated pipe 5, and the upper end of the backwashing system 6 passes through the compacted planting soil layer 4 and is arranged to protrude upward, and the green plant part 9 is arranged at least around the upper end of the backwashing system 6 and the upper end of the overflow system 7. Furthermore, the rammed soil layer 2 is used as the basis for the arrangement, and it is well rammed to support the arrangement of the upper part; the gravel drainage layer 3 and the perforated pipe 5 cooperate to achieve better guidance of water drainage; the planting soil compaction layer 4 provides a basis for the arrangement of the green plant part 9, and the green plant part 9 at least shields the backwash system 6 and the overflow system 7, thereby improving the aesthetics and increasing the degree of greening, and it is also beneficial to shield some debris through the arrangement of green plants to prevent them from clogging the upper end of the backwash system 6 and the overflow system 7; at the same time, the pebble foot guard 8 ensures the stability of the surrounding area of ​​the planting soil compaction layer 4.

[0022] Furthermore, as a preferred embodiment, the compaction coefficient of the plain soil compaction layer 2 is greater than 90%.

[0023] Furthermore, as a preferred embodiment, the planting soil compaction layer 4 includes: an outer plane portion 10, an inclined portion 11 and an inner plane portion 12. The outer plane portion 10, the inclined portion 11 and the inner plane portion 12 are connected in sequence from the outside to the inside. The horizontal height of the outer plane portion 10 is greater than the horizontal height of the inner plane portion 12, and the inclined portion 11 is inclined relative to the horizontal plane.

[0024] Further, as a preferred embodiment, the upper end of the overflow system 7 is disposed through the inner plane portion 12 , and the upper end of the backwash system 6 is disposed through the inclined portion 11 .

[0025] Further, as a preferred embodiment, the horizontal height of the upper end of the overflow system 7 is smaller than the horizontal height of the outer plane portion 10 .

[0026] Further, as a preferred embodiment, a walkway portion 13 is formed on the inner plane portion 12, and a water-permeable imitation stone brick portion 14 is paved on the walkway portion 13. Further, the water-permeable imitation stone brick portion 14 is formed by a plurality of imitation stone bricks with water permeability to facilitate the passage of personnel.

[0027] Further, as a preferred embodiment, the outer side of the permeable imitation stone brick portion 14 is paved with a pebble edging portion 15. Further, the pebble edging portion 15 piled around the permeable imitation stone brick portion 14 provides aesthetics and limits the position thereof.

[0028] Further, as a preferred embodiment, a geotextile layer 16 is laid between the rammed earth layer 2 and the gravel drainage layer 3. Further, the geotextile layer 16 includes at least one geotextile extending in the horizontal direction, and may also be formed by multiple stacked geotextiles to ensure the stability between the rammed earth layer 2 and the gravel drainage layer 3.

[0029] Further, as a preferred embodiment, an anti-seepage geomembrane layer 17 is laid between the gravel drainage layer 3 and the gravel drainage layer 3. Further, the anti-seepage geomembrane layer 17 includes at least one anti-seepage geomembrane extending in the horizontal direction, and may also be formed by multiple stacked anti-seepage geomembranes; to ensure the stability between the gravel drainage layer 3 and the gravel drainage layer 3.

[0030] Further, as a preferred embodiment, the backwashing system 6 comprises: a backwashing pipe 18 and a pipe cover 19, the lower end of the backwashing pipe 18 is connected to the perforated pipe 5, and the upper end of the backwashing pipe 18 is detachably mounted with the pipe cover 19. Further, when it is necessary to backwash the perforated pipe 5 and the gravel drainage layer 3 around it, the pipe cover 19 can be opened and water with sufficient strength can be supplied inward.

[0031] Further, as a preferred embodiment, the overflow system 7 includes: a pipe well 20 and a well cover 21, the lower end of the pipe well 20 is connected to the perforated pipe 5, and the upper end of the pipe well 20 is detachably installed with the well cover 21, and a plurality of water holes are opened on the well cover 21.

[0032] Further, as a preferred embodiment, the horizontal height of the lower end of the pipe well 20 is less than the horizontal height of the lower edge of the perforated pipe 5. Further, a ladder may be provided inside the pipe well 20, and a redundant portion is formed at the bottom of the pipe well 20 to accumulate some debris in the rainwater entering from the upper end of the pipe well 20 as much as possible here for subsequent cleaning.

[0033] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention.

[0034] The utility model also has the following implementation methods based on the above:

[0035] In a further embodiment of the utility model, it also includes: a waterproof layer 22 and a building board layer 23. The rainwater garden system for the sponge city can preferably be arranged above the basement or the underground garage. The above-mentioned building board layer 23 is formed through the top of the basement or the underground garage, or an additional building board layer 23 is provided, and a waterproof layer 22 is arranged thereon, and the waterproof layer 22 is arranged below the rammed earth layer 2.

[0036] In a further embodiment of the present invention, Figure 2 As shown, it also includes: an external water supply system 24, which is used to supply water to the backwashing system 6.

[0037] In a further embodiment of the utility model, the external water supply system 24 includes: a water supply pipe 25, a water storage well 26, a pumping pipe 27, a water pump 28 and a water delivery pipe 29. The water supply pipe 25 is used to connect to the roof rainwater pipe of the building 30 or the urban water supply pipe 25 network, and then transport the water to the water storage well 26 for temporary storage. Then, under the action of the pumping pump 28, the water is pumped into the water delivery pipe 29 through the pumping pipe 27, and supplied to the backwash pipe 18 through the water delivery pipe 29.

[0038] In a further embodiment of the present invention, the external water supply system 24 further includes: an automatic control system for detecting the amount of water in the water storage well 26 and controlling the automatic operation of the water pump 28 according to actual demand.

[0039] In a further embodiment of the utility model, an overflow pipe connected to the overflow system 7 may be provided at the upper part of the water storage well 26, so that when the rainwater in the pipe well 20 accumulates to a certain level, it can enter the water storage well 26 through the overflow pipe for storage.

[0040] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A rain garden system for a sponge city, characterized in that: include: A foundation pit, a rammed soil layer, a gravel drainage layer, a compacted planting soil layer, a perforated pipe, a backwash system, an overflow system, a pebble foot guard and a green plant part. The foundation pit is opened on the ground and is recessed relative to the ground. The rammed soil layer, the gravel drainage layer and the compacted planting soil layer are sequentially laid in the foundation pit from bottom to top. The pebble foot guard is laid at the outer edge of the compacted planting soil layer. The perforated pipe is embedded in the gravel drainage layer in a horizontal direction. The lower end of the overflow system is connected to the perforated pipe, and the upper end of the overflow system passes through the compacted planting soil layer and is protruding upward. The lower end of the backwash system is connected to the perforated pipe, and the upper end of the backwash system passes through the compacted planting soil layer and is protruding upward. The green plant part is at least arranged around the upper end of the backwash system and the upper end of the overflow system.

2. The rain garden system for sponge city according to claim 1 is characterized in that: The compacted planting soil layer includes: an outer plane portion, an inclined portion and an inner plane portion, wherein the outer plane portion, the inclined portion and the inner plane portion are sequentially connected from the outside to the inside, the horizontal height of the outer plane portion is greater than the horizontal height of the inner plane portion, and the inclined portion is inclined relative to the horizontal plane.

3. The rain garden system for sponge city according to claim 2 is characterized in that: The upper end of the overflow system is disposed through the inner plane portion, and the upper end of the backwash system is disposed through the inclined portion.

4. The rainwater garden system for sponge city according to claim 2 is characterized in that: A walkway portion is formed on the inner plane portion, and a water-permeable imitation stone brick portion is paved on the walkway portion.

5. The rain garden system for sponge city according to claim 4 is characterized in that: The outer side of the permeable imitation stone brick part is paved with a pebble edging part.

6. The rain garden system for sponge city according to claim 1, characterized in that: A geotextile layer is laid between the plain soil compaction layer and the gravel drainage layer.

7. The rain garden system for sponge city according to claim 1, characterized in that: An anti-seepage geomembrane layer is laid between the gravel drainage layer and the gravel drainage layer.

8. The rain garden system for sponge city according to claim 1, characterized in that: The backwashing system comprises a backwashing pipe and a pipe cover. The lower end of the backwashing pipe is communicated with the perforated pipe, and the pipe cover is detachably mounted on the upper end of the backwashing pipe.

9. The rain garden system for sponge city according to claim 1, characterized in that: The overflow system comprises: a pipe well and a well cover, wherein the lower end of the pipe well is communicated with the perforated pipe, and the upper end of the pipe well is detachably and washably mounted with the well cover, wherein a plurality of water holes are opened on the well cover.

10. The rain garden system for sponge city according to claim 9, characterized in that: The level of the lower end of the tube well is less than the level of the lower edge of the perforated pipe.

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