Rainwater garden greening structure with bioretention pond

Abstract

The utility model aims to provide a rainwater garden greening structure with a biological detention pond, which comprises an original soil layer, a trapezoidal gabion is arranged between a paved road surface and a rainwater garden sinking groove, and a side water groove is arranged between the trapezoidal gabion and the paved road surface; sinking grooves are formed in the tops of the trapezoidal gabions, and the bottom surfaces of the sinking grooves are flush with the top surface of the first planting soil layer. The utility model relates to the technical field of landscaping design, a side water tank is arranged outside a pavement, so that water flow left by the pavement is firstly gathered in the side water tank to form a buffer area before the water flow flows into a rainwater garden sinking groove, and the impact force of the water flow is reduced. When a large amount of water flows into the side water tank, high-water-level water flows into the sinking groove of the rainwater garden through the sinking grooves along the outer wall face of the trapezoidal gabion, the uncertainty of the water flow outflow direction is reduced, accurate control over the water flow direction is achieved, and the flood problem possibly caused by the fact that water flow overflows all around is avoided.

Description

Technical Field

[0001] This utility model relates to the field of landscape design technology, specifically a rain garden greening structure with a bioretention pool. Background Technology

[0002] Rain gardens, as a type of landscaped rainwater management facility, mimic natural hydrological processes and utilize designed landscape elements to collect, filter, and absorb rainwater. In rain gardens, bioretention ponds are typically an integral part, and the two work together to form an integrated rainwater management system. Within this system, rainwater is absorbed and filtered, providing nutrients for the plants, while excess rainwater is drained away through a well-designed drainage system.

[0003] However, existing rain garden structures have some problems. Due to the unpredictable nature of water flow, rainwater flowing from the ground into the rain garden's drainage channel can easily form multiple channels flowing in different directions. This irregular flow pattern, over time, leads to the loss of both the original soil and the planted topsoil, thus affecting the stability and function of the rain garden. Furthermore, the erosion of the soil by the water flow also removes nutrients needed for plant growth, reducing the ecological benefits of the rain garden. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a rain garden greening structure with a bioretention pond, which solves the problem that existing rainwater tends to form multiple channels in different directions, leading to the loss of original soil and planting soil.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a rain garden greening structure with a bioretention pool, including a soil layer, on which a paved road surface is laid and a rain garden trough is provided;

[0006] A trapezoidal gabion is installed between the paved road surface and the rain garden trough, and a side water channel is installed between the trapezoidal gabion and the paved road surface.

[0007] The rain garden trough is laid with a fine stone covering layer and a second planting layer from top to bottom, and the fine stone covering layer is connected to the outer bottom edge of the trapezoidal gabion.

[0008] Preferably, the first planting soil layer and the first crushed stone cushion layer are laid in the side water trough from top to bottom.

[0009] Preferably, the top of the trapezoidal gabion is provided with a sinking trough, and the bottom surface of the sinking trough is flush with the top surface of the first planting soil layer.

[0010] Preferably, the depth of the settling tank is a, wherein 70mm < a < 150mm.

[0011] Preferably, the plurality of grooves are spaced apart by a plurality of protrusions.

[0012] Preferably, the fine stone cover layer has a thickness of b, and the outer bottom of the ladder-shaped stone cage has a thickness of c, wherein b≥c.

[0013] Preferably, the bottom of the rain garden groove is paved with an impermeable geotextile, and the fine stone cover layer and the second planting layer are paved in the impermeable geotextile.

[0014] The bottom of the second planting layer is further provided with a second gravel cushion layer, and a water-permeable geotextile is arranged between the second gravel cushion layer and the second planting layer.

[0015] Preferably, the second planting layer has a thickness of 400mm-500mm.

[0016] Preferably, the second gravel cushion layer has a thickness of 150mm-220mm. Beneficial effects

[0017] By using the rain garden greening structure with the bioretention pool, the side water groove is arranged outside the paved road surface, so that the water flow left on the paved road surface is first collected in the side water groove, forming a buffer zone before the water flow flows into the rain garden groove, the water flow is collected and summarized, and a smooth transition is provided for the water flow entering the rain garden groove, reducing the impact force of the water flow. After the water flow passes through the side water groove and enters the ladder-shaped stone cage, the water flow flows into the rain garden groove through the gaps between the stones in the ladder-shaped stone cage, reducing the erosion of the soil in the second planting layer by the water flow, protecting the soil structure, and being beneficial to the growth of plants. When a large amount of water flows into the side water groove, the high water level water flows into the rain garden groove along the outer wall surface of the ladder-shaped stone cage through the plurality of grooves, reducing the uncertainty of the water flow direction, realizing accurate control of the water flow direction, and avoiding the waterlogging problem caused by the water flow flowing everywhere. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic view of the rain garden structure of the utility model;

[0019] Figure 2 It is a schematic view of the ladder-shaped stone cage structure of the utility model.

[0020] Explanation of symbols in the drawing

[0021] 1, original soil layer, 2, paved road surface, 3, rain garden groove, 4, side water groove, 5, first planting soil layer, 6, first gravel cushion layer, 7, ladder-shaped stone cage, 8, fine stone cover layer, 9, second planting soil layer, 10, water-permeable geotextile, 11, second gravel cushion layer, 12, impermeable geotextile, 13, groove, 14, protrusion. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Various changes can be made to the implementation scheme as long as the effects of the present invention can be achieved.

[0023] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0024] Reference Figures 1-2 The rain garden greening structure with bioretention ponds in this implementation plan is described.

[0025] like Figure 1 As shown, the rain garden greening structure includes a soil layer 1, on which a paved road surface 2 is laid and a rain garden trough 3 is installed. The soil layer 1 is the foundation layer; before the paved road surface 2 is laid, the soil layer beneath it needs to be compacted. The overall depth of the rain garden trough 3 is between 1300mm and 1500mm.

[0026] In one embodiment, a trapezoidal gabion 7 is provided between the paved road surface 2 and the rain garden trough 3. The trapezoidal gabion 7 is used to reinforce the paved road surface 2 and resist the erosion of the original soil layer 1 and the paved road surface 2 by the flowing water. At the same time, it can also evenly allow the water left by the paved road surface 2 to flow into the rain garden trough 3.

[0027] Furthermore, in this embodiment, a side drainage trough 4 is provided between the trapezoidal gabion 7 and the paved road surface 2, with the side drainage trough 4 adjacent to both the trapezoidal gabion 7 and the paved road surface 2; wherein, the depth of the side drainage trough 4 is less than the depth of the trapezoidal gabion 7. With the design of the side drainage trough 4, the water flowing from the paved road surface 2 first gathers in the side drainage trough 4, forming a buffer zone before the water flows into the rain garden trough 3, collecting and concentrating the water flow. Then, the water flows into the trapezoidal gabion 7 and slowly flows into the rain garden trough 3 through the gaps between the stones inside.

[0028] The trapezoidal gabion 7 is connected to the bottom outer side of the trapezoidal gabion 7 by a fine stone covering layer 8 and a second planting layer 9 laid from top to bottom within the rain garden trough 3. The fine stone covering layer 8 covers the surface of the second planting layer 9, protecting it from water erosion and effectively resisting water flow.

[0029] The thickness of the fine stone covering layer 8 is b, and the thickness of the outer bottom edge of the trapezoidal gabion 7 is c, where b ≥ c. When water flows inside the trapezoidal gabion 7, since the water flows downward, it flows directly into the fine stone covering layer 8 through the outer bottom edge of the trapezoidal gabion 7, reducing the erosion of the soil in the second planting layer 9 by the water flow.

[0030] The first planting soil layer 5 and the first gravel cushion layer 6 are laid sequentially from top to bottom inside the side water trough 4. The combination of the first planting soil layer 5 and the first gravel cushion layer 6 forms a small-scale greening design, allowing for greening and planting within a small area inside the side water trough 4.

[0031] In one implementation, such as Figure 1 and Figure 2 As shown, a sinkhole 13 is provided at the top of the trapezoidal gabion 7, and the bottom surface of the sinkhole 13 is flush with the top surface of the first planting soil layer 5. The depth of the sinkhole 13 is 'a', where 70mm < a < 150mm. The design of the sinkhole 13 allows excess water in the side drainage trough 4 to flow directionally along the outer wall of the trapezoidal gabion 7 into the rain garden sinkhole 3; the directional outflow of water reduces the uncertainty of the outflow direction, controls the direction of water flow, avoids water overflow and potential flooding problems, and reduces adverse impacts on the surrounding environment.

[0032] Preferably, in this embodiment, there are multiple sinks 13, which are formed at intervals by multiple protrusions 14. Excess water in the side water tank 4 flows into the rain garden sink 3 through the multiple sinks 13 along the outer wall of the trapezoidal gabion 7.

[0033] In a preferred embodiment, the bottom of the rain garden trough 3 is covered with an impermeable geotextile 12, and the fine stone covering layer 8 and the second planting layer 9 are laid inside the impermeable geotextile 12. A second crushed stone cushion layer 11 is also provided at the bottom of the second planting layer 9, and a permeable geotextile 10 is provided between the second crushed stone cushion layer 11 and the second planting layer 9. Water that has become saturated in the second planting layer 9 seeps into the second crushed stone cushion layer 11 through the permeable geotextile 10. The rain garden trough 3 is also equipped with a rainwater overflow well, which is inserted into the second crushed stone cushion layer 11 to drain excess water.

[0034] Specifically, the thickness of the second planting layer 9 is 400mm-500mm, preferably 500mm. The thickness of the second crushed stone bedding layer 11 is 150mm-220mm, preferably 200mm.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rain garden greening structure with a bioretention pond, comprising a soil layer (1), on which a paved road surface (2) is laid and a rain garden trough (3) is provided, characterized in that: A trapezoidal gabion (7) is provided between the paved road surface (2) and the rain garden trough (3), and a side water channel (4) is provided between the trapezoidal gabion (7) and the paved road surface (2). The rain garden trough (3) is laid with a fine stone covering layer (8) and a second planting layer (9) from top to bottom. The fine stone covering layer (8) is connected to the bottom edge of the outer side of the trapezoidal gabion (7).

2. The rain garden greening structure with a bioretention pond according to claim 1, characterized in that: The first planting soil layer (5) and the first crushed stone cushion layer (6) are laid in the side water trough (4) from top to bottom.

3. A rain garden greening structure with a bioretention pond according to claim 1, characterized in that: The trapezoidal gabion (7) is provided with a sinking trough (13) at the top, and the bottom surface of the sinking trough (13) is flush with the top surface of the first planting soil layer (5).

4. A rain garden greening structure with a bioretention pond according to claim 3, characterized in that: The depth of the settling tank (13) is a, where 70mm < a < 150mm.

5. A rain garden greening structure with a bioretention pond according to claim 3, characterized in that: There are multiple sinks (13), and the multiple sinks (13) are formed at intervals by multiple protrusions (14).

6. A rain garden greening structure with a bioretention pond according to claim 1, characterized in that: The thickness of the fine stone covering layer (8) is b, and the thickness of the outer bottom edge of the trapezoidal gabion (7) is c, where b ≥ c.

7. A rain garden greening structure with a bioretention pond according to claim 1, characterized in that: The bottom of the rain garden trough (3) is covered with impermeable geotextile (12), and the fine stone covering layer (8) and the second planting layer (9) are laid inside the impermeable geotextile (12). A second gravel cushion layer (11) is also provided at the bottom of the second planting layer (9), and a permeable geotextile (10) is provided between the second gravel cushion layer (11) and the second planting layer (9).

8. A rain garden greening structure with a bioretention pond according to claim 1 or 7, characterized in that: The thickness of the second planting layer (9) is 400mm-500mm.

9. A rain garden greening structure with a bioretention pond according to claim 7, characterized in that: The second crushed stone cushion layer (11) has a thickness of 150mm-220mm.

Images