A modular rain garden

Abstract

The utility model discloses a modular rain garden, including a water storage and filtration module and an overflow module arranged in an array form, the water storage and filtration module including a bottom plate and a side plate connected end to end along the edge of the bottom plate and vertically enclosed, the side plate including a first mounting frame and a perforated flat plate, the mounting frame is fixed with three layers of perforated flat plates from top to bottom, the space enclosed by the perforated flat plates of each layer is sequentially arranged as a planting soil layer, a gravel drainage layer and a water collection layer from top to bottom; the overflow module includes an overflow cover and a box body sleeved under the overflow cover, the overflow cover includes a perforated cover body at the top and a cover body adapted to the perforated cover body, a layer of impermeable membrane is laid on the side plate of the box body, and a water pipe interface is reserved on the lower side of the box body; the water storage and filtration module and the overflow module are both arranged on a concrete foundation. The application is applicable to low-impact development rainwater systems for buildings and community courtyards, makes up for the deficiencies of the prior art, and provides a safe, reliable and convenient modular installation system for rain gardens.

Description

Technical Field

[0001] The utility model relates to the technical field of green space or residential courtyard engineering, in particular to a modular rainwater garden. Background Art

[0002] As a bioretention facility, rain gardens are mainly suitable for buildings and green areas around buildings, roads and parking lots in residential areas, as well as urban green areas such as urban road green belts. They have various forms, wide application areas, are easy to combine with landscapes, have good runoff control effects, and have low construction and maintenance costs. Rain gardens have the function of regulating and purifying site runoff rainwater. Rain gardens can not only purify surface runoff through plants and soil, but also use the pores of the aquifer and planting soil layer above them to retain and slowly release part of the runoff rainwater, thereby achieving the purpose of controlling runoff peaks and runoff pollution.

[0003] At present, rain gardens are generally constructed by on-site excavation, followed by the laying of the anti-seepage membrane of the pool body. After the anti-seepage membrane is laid, the gravel drainage layer of the rain garden is filled, the matching drainage pipes are laid, and the overflow well is built. After the drainage layer is constructed, a layer of permeable geotextile is laid, and then the planting soil layer is filled. After the planting soil layer is constructed, a layer of bark or gravel covering layer is laid, and finally greening and environmental beautification are carried out. Although this method of building and installing rain gardens is relatively mature, it also has the following disadvantages: on-site excavation and filling, the construction is complex, labor-intensive and time-consuming; the filling construction level is uneven, the quality of the planting soil is difficult to control, and the purification and retention functions of the rain garden are difficult to ensure; the service life of the anti-seepage membrane is short, it is easy to leak, and endangers the safety of the building foundation; the overflow well is built on-site, which occupies a large area, is not beautiful and is prone to leakage; the planting soil layer and gravel drainage layer in the rain garden are filled manually on-site, and daily maintenance is difficult. Utility Model Content

[0004] The technical problem to be solved by this application is that the construction and installation of existing rainwater gardens are complicated, the filling construction level is uneven, the purification and storage functions are difficult to ensure, the anti-seepage membrane is prone to leakage, and daily maintenance is difficult.

[0005] To solve the above technical problems, the present application provides a modular rain garden, including a water storage and filtration module and an overflow module arranged in an array, the water storage and filtration module including a bottom plate and side plates connected end to end and vertically built along the edge of the bottom plate, the side plates including a first mounting frame and a perforated flat plate, the mounting frame is fixed with three layers of perforated flat plates from top to bottom, the space enclosed by the perforated flat plates of each layer is sequentially arranged as a planting soil layer, a gravel drainage layer and a water collection layer from top to bottom; the overflow module includes an overflow cover and a box body sleeved under the overflow cover, the overflow cover includes a perforated cover body at the top and a cover body matched with the perforated cover body, a layer of anti-seepage membrane is laid on the side plates of the box body, and a water pipe interface is reserved on the lower side of the box body; wherein, the shape and specifications of the boxes of the water storage and filtration module and the overflow module are consistent; wherein, the water storage and filtration module and the overflow module are both arranged on a concrete foundation.

[0006] According to the embodiment of the present application, the gravel drainage layer is woven from a stainless steel wire mesh, the gravel drainage layer filler is gravel with a particle size of 20 to 30 mm, and the drainage layer thickness is 200 mm.

[0007] According to an embodiment of the present application, a drainage pipe is laid at the water pipe interface of the overflow module and connected to a downstream outdoor rainwater inspection well.

[0008] According to an embodiment of the present application, a second mounting frame is provided inside the box body, an upper portion of the second mounting frame is used for placing a cover body with holes, and a lower portion of the second mounting frame is used for connecting the box body.

[0009] According to an embodiment of the present application, the planting soil layer includes a planting soil filler and a permeable geotextile laid at the bottom of the planting soil filler. A perforated flat plate is provided at the bottom of the planting soil layer, and the thickness of the planting soil layer is 300 mm.

[0010] According to the embodiment of the present application, the water storage and filtration module is a right-angled quadrangular prism structure as a whole, and the length of the water storage and filtration module is 800 mm, the width is 800 mm, and the height is 650 mm.

[0011] According to the embodiment of the present application, the overflow module is a rectangular quadrangular prism structure with a length of 800 mm, a width of 800 mm, and a height of 850 mm, and its overflow water volume is 40 to 60 L / s.

[0012] According to an embodiment of the present application, a layer of anti-seepage membrane is laid on the surface of the concrete foundation, and the overlapping width of the anti-seepage membrane is not less than 200 mm.

[0013] According to an embodiment of the present application, the water storage and filtration module and the housing are integrally cast with resin concrete, and a layer of impermeable membrane is laid on one side of the water storage and filtration module and the housing adjacent to the soil.

[0014] According to an embodiment of the present application, the excavation depth of the foundation pit of the rain garden is 850 mm, and the poured concrete foundation is 150 mm thick.

[0015] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0016] 1. The utility model adopts a modular rain garden device, which can match the number of water storage and filtration modules and overflow modules according to project needs, and can achieve the control requirements of different runoff peaks and runoff pollution. It has a wide range of applications and can be applied to a variety of buildings and community courtyards to develop low-impact rainwater systems.

[0017] 2. The utility model adopts factory-customized water storage and filtration modules. The planting soil layer and gravel drainage layer placed in the water storage and filtration module are pre-filled in the factory. During construction, it is only necessary to simply place the module, thus avoiding the problems of uneven filling construction levels, difficult to control the quality of planting soil, and difficult to ensure the purification and storage functions of the rainwater garden. The overflow module is connected to the water storage and filtration module through the opening design of the side panel, and is connected to the downstream outdoor rainwater inspection well through the drainage pipeline laid through the drainage gate. There is no need to build an overflow well on site, and the construction is simple, convenient and beautiful.

[0018] 3. When replacing the filler of the modular rain garden of the utility model, it is only necessary to remove the upper planting soil layer to carry out the operation, which is very simple and practical. After the filler is replaced, the contaminated planting soil is directly returned to the factory for harmless treatment and regeneration, avoiding the secondary environmental pollution caused by on-site soil replacement. The subsequent maintenance is simple, avoiding the problem of on-site manual filling of the planting soil layer and the gravel drainage layer in the rain garden and the difficulty of daily maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present application, rather than limiting the present application.

[0020] Figure 1 A schematic diagram of the structure of a modular rain garden as an example of the present utility model;

[0021] Figure 2 This is an exploded schematic diagram of a water storage and filtration module in an example of the present utility model;

[0022] Figure 3 This is an exploded schematic diagram of the overflow module in the example of the present utility model;

[0023] Figure 4 This is a schematic diagram of the rain garden foundation pit in the example of the utility model;

[0024] Figure 5 This is an application scenario diagram of an example of the present utility model.

[0025] The following are the descriptions of the reference numerals:

[0026] 1. Drainage pipe, 2. Perforated flat plate, 3. Concrete foundation, 10. Water storage and filtration module, 11. Bottom plate, 12. Side plate, 20. Overflow module, 21. Box body, 22. Overflow cover, 221. Perforated cover body.

[0027] Figure 5 The middle arrow indicates the direction of rainwater flow. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the patent application specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "an" do not indicate a quantity limitation, but indicate the existence of at least one.

[0030] according to Figure 1-5 As shown, a modular rain garden exemplified by the utility model includes water storage and filtration modules 10 arranged in an array form, and according to the modular appearance, the number of modules can be matched according to the needs of the project, and the control requirements of different runoff peaks and runoff pollution can be achieved. It is applicable to both spacious green spaces and relatively small buildings and community courtyards. Compared with the prior art, when replacing the filler of the modular rain garden of the present application, it is only necessary to remove the upper planting soil layer to carry out the operation, which is very simple and practical. After the filler of the modular rain garden of the utility model is replaced, the contaminated planting soil is directly returned to the factory for harmless treatment and regeneration, avoiding secondary environmental pollution caused by on-site soil replacement.

[0031] In this embodiment, the water storage and filtration module 10 includes a bottom plate 11 and a side plate 12 that is connected end to end and vertically built along the edge of the bottom plate 11. The side plate 12 includes a first mounting frame and a perforated flat plate 2. The mounting frame is fixed with three layers of perforated flat plates 2 from top to bottom. The space enclosed by the perforated flat plates 2 of each layer is sequentially arranged as a planting soil layer, a gravel drainage layer and a water collection layer from top to bottom; a water pipe interface is reserved on the side wall of the water collection layer.

[0032] Furthermore, the water storage and filtration modules 10 are all factory-produced, and the sides of the water storage and filtration modules 10 are all perforated structures, which play a role in connecting adjacent modules and can also serve as lifting holes to facilitate lifting construction.

[0033] Furthermore, the water storage and filtration module 10 is integrally cast with resin concrete, and a layer of anti-seepage membrane is laid on the side bordering the original soil. The structure is firm and has no risk of leakage, and will not cause damage to the foundation of the building. It is particularly suitable for small courtyards with serious runoff pollution, high groundwater levels, poor geological conditions, and close to the foundation of the building.

[0034] Furthermore, the water storage and filtration module 10 is a rectangular quadrangular prism structure of 800 mm (length) × 800 mm (width) × 650 mm (height), which can withstand 20 to 30 m 2 The water storage and filtration module 10 is small in size, and the number of modules can be matched according to the needs of the project to meet the control requirements of different runoff peaks and runoff pollution.

[0035] Furthermore, the water storage and filtration module 10 is divided into three parts, the upper part is the planting soil layer, the middle part is the gravel drainage layer, and the lower part is the bottom water collection space. The gravel drainage layer is woven with stainless steel wire mesh, and the gravel drainage layer filler is gravel with a particle size of 20 to 30 mm, and the drainage layer thickness is 200 mm; the planting soil layer is directly filled, and the planting soil layer includes planting soil filler and a permeable geotextile laid at the bottom of the planting soil filler, and a layer of 200g / m3 per unit weight is laid at the bottom of the filler. 2 The permeable geotextile is provided at the bottom of the planting soil layer. The thickness of the planting soil layer is 300mm.

[0036] In this embodiment, the overflow module 20 includes an overflow cover 22 and a box body 21 that is sleeved under the overflow cover 22. The overflow cover 22 includes a perforated cover body 221 at the top and a cover body that is compatible with the perforated cover body 221. A layer of impermeable membrane is laid on the side panel 12 of the box body 21, and a water pipe interface is reserved on the lower side of the box body.

[0037] Furthermore, the shape and specifications of the box body 21 of the water storage and filtration module 10 and the overflow module 20 are consistent, and a water pipe interface is reserved on the side wall of the water collection layer of the water storage and filtration module 10, such as Figure 2 , Figure 3 As shown, the box 21 structure can be a hollow structure of the water storage and filtration module 10, and the overflow cover 22 is placed above it to facilitate unified production in the factory. When the box 21 structure is used as a component of the overflow module 20, a layer of impermeable membrane is laid around the box 21 structure. The impermeable membrane includes two layers of waterproof cloth and a layer of waterproof membrane, the membrane thickness is ≥1.2mm, and the overlap width is not less than 200mm.

[0038] Furthermore, the water storage and filtration module 10 and the housing 21 are integrally cast with resin concrete, and a layer of impermeable membrane is laid on one side of the water storage and filtration module 10 and the housing 21 adjacent to the soil.

[0039] Furthermore, the overflow module 20 as a whole is a right-angled quadrangular prism structure of 800 mm (length)×800 mm (width)×850 mm (height), and the overflow water volume is 40-60 L / s.

[0040] Furthermore, a second installation frame is provided inside the box body 21 , the upper portion of the second installation frame is used to place the perforated cover body 221 , and the lower portion of the second installation frame is used to connect to the box body 21 .

[0041] Furthermore, the water storage and filtration module 10 is connected to the overflow module 20, and the collected rainwater is discharged to the bottom water collection layer of the water storage and filtration module 10 through the upper planting soil layer and the gravel drainage layer, and then discharged into the overflow module 20, and connected to the outdoor rainwater well of the community through the drainage main of the overflow module 20. Among them, the drainage pipe 1 is laid at the water pipe interface of the overflow module 20 to connect with the downstream outdoor rainwater inspection well.

[0042] In this embodiment, the water storage and filtration module 10 and the overflow module 20 are both arranged on the concrete foundation 3. A layer of impermeable membrane is laid on the surface of the concrete foundation 3, and the overlapping width of the impermeable membrane is not less than 200 mm.

[0043] Furthermore, the excavation depth of the foundation pit of the rain garden is 850mm, and the poured concrete foundation 3 is 150mm thick.

[0044] In this embodiment, the overall construction process of a modular rain garden is as follows:

[0045] 1. The water storage and filtration module 10 and the overflow module 20 are both factory-produced, and the main body of the water storage and filtration module 10 and the box body 21 of the overflow module 20 are integrally cast with resin concrete;

[0046] 2. The filling of fillers is also completed in the factory. The middle gravel drainage layer and the upper planting soil layer are filled before the modules leave the factory;

[0047] 3. On-site construction: First, excavate the outdoor site to a depth of 850mm, pour a 150mm thick concrete foundation 3, and lay a layer of anti-seepage membrane in the concave area, two layers of cloth and one membrane, the membrane thickness is ≥1.2mm, and the overlap width is not less than 200mm;

[0048] 4. After the concrete foundation 3 is poured, the water storage and filtration module 10 and the overflow module 20 are placed on the foundation and fixed firmly;

[0049] 5. After the water storage and filtration module 10 and the overflow module 20 are installed, a drainage pipe 1 is laid at the drainage pipe interface reserved at the bottom of the integral overflow module 20 to connect with the downstream outdoor rainwater inspection well;

[0050] 6. After the drainage pipe 1 is laid, the surrounding outdoor area is backfilled and leveled, and a 70mm thick bark covering layer is laid above the utility model modular rain garden;

[0051] 7. After the bark covering layer is laid, it will be trimmed and beautified and various water-resistant ornamental plants will be planted. The community roads will be paved and the rain garden will be installed.

[0052] like Figure 5 This is an application scenario diagram after the rainwater garden is completed. The garden module is installed in a green space or a residential courtyard. It is composed of a water storage and filtration module 10 and an overflow module 20. Various water-resistant ornamental plants are planted in the utility model modular garden, and the overflow module 20 is connected to the outdoor rainwater inspection well through the discharge pipe. The arrow indicates the direction of rainwater transportation. When it rains, rainwater from the surrounding roads, green spaces and building rainwater risers is collected in the rainwater garden. While purifying the water quality, part of the rainwater seeps and is stored, and the excess rainwater is discharged to the outdoor rainwater pipe through the water storage module.

[0053] In summary, the technical solution of the present application has the following beneficial effects:

[0054] 1. The utility model adopts a modular rain garden device, which can match the number of water storage and filtration modules and overflow modules according to project needs, and can achieve the control requirements of different runoff peaks and runoff pollution. It has a wide range of applications and can be applied to a variety of buildings and community courtyards to develop low-impact rainwater systems.

[0055] 2. The utility model adopts factory-customized water storage and filtration modules. The planting soil layer and gravel drainage layer placed in the water storage and filtration module are pre-filled in the factory. During construction, it is only necessary to simply place the module, thus avoiding the problems of uneven filling construction levels, difficult to control the quality of planting soil, and difficult to ensure the purification and storage functions of the rainwater garden. The overflow module is connected to the water storage and filtration module through the opening design of the side panel, and is connected to the downstream outdoor rainwater inspection well through the drainage pipeline laid through the drainage gate. There is no need to build an overflow well on site, and the construction is simple, convenient and beautiful.

[0056] 3. When replacing the filler of the modular rain garden of the utility model, it is only necessary to remove the upper planting soil layer to carry out the operation, which is very simple and practical. After the filler is replaced, the contaminated planting soil is directly returned to the factory for harmless treatment and regeneration, avoiding the secondary environmental pollution caused by on-site soil replacement. The subsequent maintenance is simple, avoiding the problem of on-site manual filling of the planting soil layer and the gravel drainage layer in the rain garden and the difficulty of daily maintenance.

[0057] The above are merely exemplary embodiments of the present application and are not intended to limit the protection scope of the present application. The protection scope of the present application is determined by the appended claims.

Claims

1. A modular rain garden, characterized in that: It includes water storage and filtration modules and overflow modules arranged in an array. The water storage and filtration module includes a bottom plate and side plates connected end to end along the edge of the bottom plate and vertically enclosed, the side plates include a first mounting frame and a perforated flat plate, the mounting frame is fixed with three layers of perforated flat plates from top to bottom, and the space enclosed by the perforated flat plates of each layer is sequentially arranged as a planting soil layer, a gravel drainage layer and a water collection layer from top to bottom; The overflow module includes an overflow cover and a box body sleeved under the overflow cover, the overflow cover includes a perforated cover body at the top and a cover body matched with the perforated cover body, a layer of impermeable membrane is laid on the side plate of the box body, and a water pipe interface is reserved on the lower side of the box body; Wherein, the shape and specification of the box of the water storage filter module and the overflow module are consistent; Wherein, the water storage and filtration module and the overflow module are both arranged on a concrete foundation.

2. A modular rain garden according to claim 1, characterized in that: The crushed stone drainage layer is woven from stainless steel wire mesh, the crushed stone drainage layer filler is gravel with a particle size of 20 to 30 mm, and the drainage layer thickness is 200 mm.

3. A modular rain garden according to claim 1, characterized in that: A drainage pipe is laid at the water pipe interface of the overflow module and connected to a downstream outdoor rainwater inspection well.

4. A modular rain garden according to claim 1, characterized in that: A second mounting frame is provided inside the box body, the upper portion of the second mounting frame is used for placing the cover body with holes, and the lower portion of the second mounting frame is used for connecting the box body.

5. A modular rain garden according to claim 1, characterized in that: The planting soil layer includes planting soil filler and a permeable geotextile laid at the bottom of the planting soil filler. The bottom of the planting soil layer is provided with the perforated flat plate. The thickness of the planting soil layer is 300 mm.

6. A modular rain garden according to claim 1, characterized in that: The water storage and filtration module is a right-angled quadrangular prism structure as a whole, and the length, width and height of the water storage and filtration module are 800 mm, 800 mm and 650 mm respectively.

7. A modular rain garden according to claim 1, characterized in that: The overflow module is a rectangular quadrangular prism structure with a length of 800 mm, a width of 800 mm and a height of 850 mm, and its overflow water volume is 40 to 60 L / s.

8. A modular rain garden according to claim 1, characterized in that: A layer of anti-seepage membrane is laid on the surface of the concrete foundation, and the overlapping width of the anti-seepage membrane is not less than 200mm.

9. A modular rain garden according to claim 1, characterized in that: The water storage and filtration module and the box body are integrally cast with resin concrete, and a layer of anti-seepage membrane is laid on the side of the water storage and filtration module and the box body adjacent to the soil.

10. A modular rain garden according to claim 1, characterized in that: The excavation depth of the foundation pit of the rain garden is 850mm, and the poured concrete foundation is 150mm thick.

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