A landscape drainage system for a planted roof

Abstract

The utility model discloses a kind of for planting roof landscape drainage systems, including planting unit, drainage unit and structure unit arranged from top to bottom. The drainage unit includes drainage groove, filter groove, outer baffle and water taking device, outer baffle is composed of filter plate, protection plate and cushion layer, effectively isolates planting unit and structure unit, prevent root system damage. Drainage unit is also provided with vertical drainage device, can guide excess moisture into structure layer reserved pipeline. Planting unit adopts layered structure, including drainage plate, geotextile, planting soil and plant, planting soil is equipped with gravel layer to enhance drainage and filter. Structure unit includes multilayer heat preservation and waterproof layer, improve overall sealing and heat preservation performance. The utility model has reasonable structure, construction is convenient, with multiple functions such as efficient drainage, root system protection, rainwater collection and utilization, suitable for various planting roof engineering.

Description

Technical Field

[0001] This utility model relates to the field of drainage structure technology, specifically to a landscape drainage system for green roofs. Background Technology

[0002] With the acceleration of urbanization, green roofs, as a green building technology, play an important role in beautifying the environment, regulating the climate, and saving energy and reducing emissions. However, traditional green roofs still have many problems in terms of drainage and waterproofing, such as poor drainage leading to water accumulation and root rot, plant roots penetrating the waterproofing layer, and structural leakage.

[0003] In the prior art, such as Chinese utility model patent application CN222362691U (publication date: January 17, 2025), a drainage structure for green roofs is disclosed. This structure includes a structural layer, a water circulation system on the structural layer, masonry stacked on both sides of the water circulation system, and a drainage pipe buried at the bottom of the masonry. The drainage pipe is connected to both sides of the masonry. Planting soil is filled into the pits on the sides of the masonry, and plants are planted on the surface of the planting soil. This utility model stacks masonry on both sides of the water circulation system to form a drainage ditch, allowing excess rainwater in the planting soil to be discharged into the drainage ditch through the drainage pipe and collected by the water circulation system, forming a unified structure for planting and drainage. By setting a drainage structure at the bottom of the green roof, the two are connected through a decorative masonry surface, offering advantages such as simple structure, convenient construction, prefabrication, and stable reliability.

[0004] Chinese invention patent application CN117803041A (published on April 11, 2024) discloses a rainwater harvesting system for green roofs and its construction method. The system includes a roof module and a parapet wall module. The invention incorporates a rainwater filtration device; water enters the drainage ditch through a filtration tank, effectively removing impurities and preventing pipe blockage. By collecting and utilizing rainwater, water consumption is reduced. Through the coordinated use of water replenishment and drainage systems, automatic irrigation of the vegetation layer is achieved, thus conserving water, promoting rainwater resource utilization, and protecting the ecological environment.

[0005] Therefore, there is an urgent need for a green roof drainage structure that is structurally sound, easy to construct, has efficient drainage, and provides good protection, in order to solve the problems of leakage, root damage, and poor drainage in existing technologies. Utility Model Content

[0006] To address the aforementioned issues, this application proposes a landscape drainage system for green roofs, comprising: a drainage unit, with a structural unit below the drainage unit and a planting unit above it, wherein the drainage unit isolates the planting unit and the structural unit to prevent the plant roots of the planting unit from damaging the structural unit; The drainage unit includes a drainage tank, a filter tank, an outer baffle, and a water intake device; The outer baffle is located between the planting unit and the structural unit, and includes a filter plate, a protective plate, and a pad. The pad is installed above the structural unit, and the protective plate is installed above the pad and fixed to the pad. The pad is partially recessed downwards and forms a filter groove with the protective plate. The filter plate has openings at the bottom to drain excess water from the planting unit into the filter groove while preventing excessive soil loss. A drainage trough is installed in the middle of the filter tank. The drainage trough includes a trough wall and a top cover. A water intake device is installed inside the trough wall. Pebbles, gravel, etc. are arranged inside the filter tank. The supernatant of the filtered rainwater enters the drainage trough from the top and then enters the rainwater collection system. The water intake device is connected to the rainwater collection device, and the collected rainwater can be used for irrigation.

[0007] Furthermore, the drainage unit also includes a vertical drainage device, which is installed at the bottom of the tank wall and the other end is inserted into the reserved pipe of the structural unit.

[0008] Furthermore, the vertical drainage device includes a vertical pipe, a connecting plate, and a partition plate. The vertical pipe is located at the bottom of the trough wall, and the trough wall has holes at corresponding positions. The connecting plate fixes the trough wall and the vertical pipe together, and a partition plate is also installed on the outside of the vertical pipe.

[0009] Furthermore, the isolation plate includes an upper edge, a lower edge, and a side wall. The top surface of the upper edge abuts against the bottom of the groove wall, the bottom surface of the upper edge is installed above the pad layer, the side wall is sleeved on the outside of the vertical pipe, and the lower edge is installed inside the structural unit.

[0010] Furthermore, the vertical pipe and the connecting plate are bolted together, and the vertical pipe and the isolation plate are bolted together.

[0011] Furthermore, the water intake device includes a water intake pipe and a water intake head, and the top cover has an opening corresponding to the position of the water intake head, with the water intake head extending out of the top cover.

[0012] Furthermore, the planting unit consists of a drainage board, geotextile planting soil, and plants from bottom to top. The geotextile has an "L" shaped cross-section and is laid vertically against the inner side of the filter board and horizontally against the top surface of the drainage board. The drainage board is installed above the protective board.

[0013] Furthermore, the planting soil consists of a gravel layer and a soil layer from bottom to top. The gravel layer can initially filter rainwater entering the planting soil, ensuring that rainwater drains quickly and preventing water accumulation and root rot at the bottom.

[0014] Furthermore, the geotextile is a permeable geotextile, weighing 150-200 grams per square meter.

[0015] Furthermore, the drainage board is a permeable embossed board with the convex points facing downwards. The convex points of the drainage board form a confluence channel, and the rainwater filtered by the planting soil enters the filter tank along the confluence channel.

[0016] Furthermore, the structural unit consists of a floor slab, a first insulation layer, a second insulation layer, and a waterproof layer from bottom to top. A padding layer is laid on top of the waterproof layer to effectively isolate the structural unit from the planting unit above it.

[0017] Furthermore, the structural unit also includes a sealing strip located between the first insulation layer, the second insulation layer, and the waterproof layer, which can further improve the sealing performance of the structural unit.

[0018] Furthermore, the lower edge is installed between the first insulation layer and the floor slab.

[0019] Compared with existing technologies, the advantages and effects of this application are as follows: 1. This application achieves efficient drainage, root protection, structural sealing and rainwater utilization of green roofs through the organic combination of multi-layer structural units, drainage units and planting units. It has the advantages of reasonable structure, convenient construction, long service life and low maintenance cost, which significantly improves the comprehensive performance and reliability of green roofs.

[0020] 2. The drainage unit of this application achieves rapid drainage and soil retention through the cooperation of the filter tank and the drainage tank, avoiding blockage; the outer baffle structure effectively blocks plant roots and protects the lower structure; the water intake device collects rainwater through the drainage tank, which can be used for irrigation, improving water resource utilization efficiency; the vertical drainage device can guide the accumulated water into the rainwater collection device, further enhancing the drainage capacity.

[0021] 3. The structural unit of this application improves the waterproof and thermal insulation performance of the roof by setting up a first insulation layer, a second insulation layer and a waterproof layer; the sealing strip further enhances the interlayer sealing to prevent leakage; at the same time, the setting of the second insulation layer can form a groove to enhance the drainage unit's ability to guide water flow.

[0022] 4. The planting unit of this application forms a smooth drainage channel by combining drainage boards and geotextiles; the combination of gravel layer and soil layer enhances permeability and prevents water accumulation at the bottom; and the synergy between permeable materials and vegetation layer promotes rainwater infiltration and utilization, thereby improving ecological benefits.

[0023] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings.

[0024] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0026] in: Figure 1 This is a plan view of a landscape drainage system for a green roof according to this application; Figure 2 This is a cross-sectional view (AA) of a landscape drainage system for a green roof according to this application. Figure 3 This is a BB cross-sectional view of a landscape drainage system for a green roof according to this application.

[0027] Explanation of reference numerals in the attached drawings: 100-Drainage unit; 110-Drainage trough; 1110-Trough wall; 1120-Top cover; 120-Filter tank; 130-Outer baffle; 1310-Filter plate; 1320-Protective plate; 1330-Bedding layer; 140-Water intake device; 1410-Water intake pipe; 1420-Water intake head; 150-Vertical drainage device; 1510-Vertical pipe; 1520-Connecting plate; 1530-Isolation plate; 200 - Planting unit; 210 - Drainage board; 220 - Geotextile; 230 - Planting soil; 240 - Plant; 300 - Structural unit; 310 - Floor slab; 320 - First insulation layer; 330 - Second insulation layer; 3310 - Sealing strip; 340 - Waterproof layer. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. In the following description, specific details such as specific configurations and components are provided merely to help fully understand the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0029] It should be understood that the phrase "an embodiment" or "this embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "an embodiment" or "this embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0030] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0031] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it have an "or" relationship.

[0032] In this article, the term "at least one" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, "at least one of A and B" can mean: A exists alone, A and B exist simultaneously, or B exists alone.

[0033] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0034] Example 1 This embodiment describes a landscape drainage system for green roofs.

[0035] Please refer to Figure 1-2 As shown, Figure 1 This is a cross-sectional view of a landscape drainage system for a green roof according to this application; Figure 1 This is a plan view of a landscape drainage system for a green roof according to this application; Figure 2 This is a cross-sectional view (AA) of a landscape drainage system for a green roof according to this application. A landscape drainage system for a green roof includes: a drainage unit 100, below which is a structural unit 300 and above which is a planting unit 200. The drainage unit 100 isolates the planting unit 200 and the structural unit 300 to prevent the plant roots of the planting unit 200 from damaging the structural unit 300. The drainage unit 100 includes a drainage trough 110, a filter trough 120, an outer baffle 130, and a water intake device 140; The outer baffle 130 is located between the planting unit 200 and the structural unit 300, and includes a filter plate 1310, a protective plate 1320, and a pad 1330. The pad 1330 is installed above the structural unit 300, and the protective plate 1320 is installed above the pad 1330 and fixed to it. The pad 1330 is partially concave downwards, forming a filter groove 120 with the protective plate 1320. The filter plate 1310 has openings at the bottom, which can drain excess water from the planting unit 200 into the filter groove 120 while preventing excessive soil loss. A drainage trough 110 is installed in the middle of the filter tank 120. The drainage trough 110 includes a tank wall 1110 and a top cover 1120. A water intake device 140 is installed inside the tank wall 1110.

[0036] The technical effects of this embodiment are as follows: By organically combining multi-layer structural units, drainage units and planting units, the green roof achieves efficient drainage, root protection, structural sealing and rainwater utilization. It has the advantages of reasonable structure, convenient construction, long service life and low maintenance cost, which significantly improves the overall performance and reliability of the green roof.

[0037] Example 2 Based on Example 1, this example discloses a further design of a drainage unit for a landscape drainage system for a green roof.

[0038] Please refer to Figure 3 The figure shown is a BB cross-sectional view of a landscape drainage system for a green roof according to this application. Furthermore, the drainage unit 100 also includes a vertical drainage device 150, which is installed at the bottom of the tank wall 1110 and has its other end inserted into the reserved pipe 350 of the structural unit 300.

[0039] Furthermore, the vertical drainage device 150 includes a vertical pipe 1510, a connecting plate 1520, and an isolation plate 1530. The vertical pipe 1510 is located at the bottom of the trough wall 1110, and the trough wall 1110 has holes at corresponding positions. The connecting plate 1520 fixes the trough wall 1110 and the vertical pipe 1510 together. An isolation plate 1530 is also installed on the outside of the vertical pipe 1510.

[0040] Furthermore, the isolation plate 1530 includes an upper edge, a lower edge, and a side wall. The top surface of the upper edge abuts against the bottom of the groove wall 1110, the bottom surface of the upper edge is installed above the pad layer 1330, the side wall is sleeved on the outside of the vertical pipe 1510, and the lower edge is installed inside the structural unit 300.

[0041] Furthermore, the vertical pipe 1510 and the connecting plate 1520 are bolted together, and the vertical pipe 1510 and the isolation plate 1530 are bolted together.

[0042] Furthermore, the water intake device 140 includes a water intake pipe 1410 and a water intake head 1420. The top cover 1120 has an opening corresponding to the position of the water intake head 1420, and the water intake head 1420 extends out of the top cover 1120.

[0043] The technical effects of this embodiment are as follows: The drainage unit of this application achieves rapid drainage and soil retention through the cooperation of the filter tank and the drainage tank, avoiding blockage; the outer baffle structure effectively blocks plant roots and protects the lower structure; the water intake device collects rainwater through the drainage tank, which can be used for irrigation, improving water resource utilization efficiency; the vertical drainage device can guide the accumulated water into the rainwater collection device, further enhancing the drainage capacity.

[0044] Example 3 Based on Example 1, this example discloses a further design of a planting unit for a landscape drainage system for a green roof.

[0045] Please refer to Figure 2 The figure shown is a cross-sectional view (AA) of a landscape drainage system for a green roof according to this application. Furthermore, the planting unit 200 consists of, from bottom to top, a drainage board 210, a geotextile 220, planting soil 230, and plants 240. The geotextile 220 has an "L" shaped cross-section and is laid vertically against the inner side of the filter plate 1310 and horizontally against the top surface of the drainage board 210. The drainage board 210 is installed above the protective plate 1320.

[0046] Furthermore, the planting soil 230 consists of a gravel layer and a soil layer from bottom to top. The gravel layer can initially filter rainwater entering the planting soil 230, ensuring that rainwater is drained quickly and preventing water accumulation and root rot at the bottom.

[0047] Furthermore, the geotextile 220 is a permeable geotextile, weighing 150 grams per square meter.

[0048] Furthermore, the drainage board 210 is a permeable convex-concave board with the convex points facing downwards. The convex points of the drainage board 210 form a confluence channel, and the rainwater filtered by the planting soil 230 enters the filter tank 120 along the confluence channel.

[0049] The technical effects of this embodiment are as follows: The structural unit of this application improves the waterproof and thermal insulation performance of the roof by setting a first insulation layer, a second insulation layer and a waterproof layer; the sealing strip further enhances the interlayer sealing and prevents leakage; at the same time, the setting of the second insulation layer can form a groove to enhance the drainage unit's ability to guide water flow.

[0050] Example 4 Based on Embodiment 1, this embodiment discloses a further design of a structural unit for a landscape drainage system for a green roof.

[0051] Please refer to Figure 2 The figure shown is a cross-sectional view (AA) of a landscape drainage system for a green roof according to this application. Furthermore, the structural unit 300 consists of a floor slab 310, a first insulation layer 320, a second insulation layer 330, and a waterproof layer 340 from bottom to top. A pad layer 1330 is laid on top of the waterproof layer, which can effectively isolate the structural unit 300 from the planting unit 200 above it.

[0052] Furthermore, the structural unit 300 also includes a sealing strip 3310, which is located between the first insulation layer 320, the second insulation layer 330 and the waterproof layer 340, and can further improve the sealing performance of the structural unit 300.

[0053] Furthermore, the lower edge is installed between the first insulation layer 320 and the floor slab 310.

[0054] The technical effects of this embodiment are as follows: The planting unit of this application forms a smooth drainage channel by combining a drainage board with a geotextile; the combination of a gravel layer and a soil layer enhances permeability and prevents water accumulation at the bottom; and the synergy between permeable materials and vegetation layers promotes rainwater infiltration and utilization, thereby improving ecological benefits.

[0055] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of protection of the present utility model. Various modifications and variations are possible with the present utility model. Any changes, modifications, substitutions, integrations, and parameter alterations to these embodiments within the spirit and principles of the present utility model fall within the scope of protection of the claims of the present utility model.

Claims

1. A landscape drainage system for green roofs, characterized in that, include: A drainage unit (100) is provided, with a structural unit (300) below it and a planting unit (200) above it. The drainage unit (100) isolates the planting unit (200) and the structural unit (300) to prevent the plant roots of the planting unit (200) from damaging the structural unit (300). The drainage unit (100) includes a drainage trough (110), a filter trough (120), an outer baffle (130), and a water intake device (140); the outer baffle (130) is located between the planting unit (200) and the structural unit (300), and includes a filter plate (1310), a protective plate (1320), and a cushion layer (1330). The cushion layer (1330) is installed above the structural unit (300), and the protective plate (1320) is installed above the cushion layer (1330); the cushion layer (1330) is partially recessed downwards, and together with the protective plate (1320) forms a filter trough (120); the filter plate (1310) has an opening at the bottom; A drainage trough (110) is installed in the middle of the filter tank (120). The drainage trough (110) includes a tank wall (1110) and a top cover (1120). A water intake device (140) is installed inside the tank wall (1110).

2. A landscape drainage system for a green roof according to claim 1, characterized in that, The drainage unit (100) also includes a vertical drainage device (150), which is installed at the bottom of the trough wall (1110) and the other end is inserted into the reserved pipe (350) of the structural unit (300).

3. A landscape drainage system for a green roof according to claim 2, characterized in that, The vertical drainage device (150) includes a vertical pipe (1510), a connecting plate (1520), and an isolation plate (1530). The vertical pipe (1510) is located at the bottom of the trough wall (1110), and the trough wall (1110) has holes at corresponding positions. The connecting plate (1520) fixes the trough wall (1110) and the vertical pipe (1510) together. An isolation plate (1530) is also installed on the outside of the vertical pipe (1510).

4. A landscape drainage system for a green roof according to claim 3, characterized in that, The isolation plate (1530) includes an upper edge, a lower edge and a side wall. The top surface of the upper edge abuts against the bottom of the groove wall (1110). The bottom surface of the upper edge is installed above the pad (1330). The side wall is sleeved on the outside of the vertical pipe (1510). The lower edge is installed inside the structural unit (300).

5. A landscape drainage system for green roofs according to claim 1, characterized in that, The water intake device (140) includes a water intake pipe (1410) and a water intake head (1420). The top cover (1120) has an opening corresponding to the position of the water intake head (1420), and the water intake head (1420) extends out of the top cover (1120).

6. A landscape drainage system for a green roof according to claim 4, characterized in that, The planting unit (200) consists of, from bottom to top, a drainage board (210), geotextile (220), planting soil (230), and plants (240). The geotextile (220) has an "L" shaped cross section. The geotextile (220) is laid vertically close to the inner side of the filter plate (1310) and horizontally close to the top surface of the drainage board (210). The drainage board (210) is installed above the protective plate (1320).

7. A landscape drainage system for a green roof according to claim 6, characterized in that, The drainage board (210) is a permeable convex-concave board with the convex points facing downwards. The convex points of the drainage board (210) form a confluence channel, and the rainwater filtered by the planting soil (230) enters the filter tank (120) along the confluence channel.

8. A landscape drainage system for a green roof according to claim 7, characterized in that, The structural unit (300) consists of a floor slab (310), a first insulation layer (320), a second insulation layer (330), and a waterproof layer (340) from bottom to top. A pad layer (1330) is laid on top of the waterproof layer, which can effectively isolate the structural unit (300) from the planting unit (200) above it.

9. A landscape drainage system for a green roof according to claim 8, characterized in that, The structural unit (300) also includes a sealing strip (3310) located between the first insulation layer (320), the second insulation layer (330), and the waterproof layer (340).

10. A landscape drainage system for a green roof according to claim 9, characterized in that, The lower edge is installed between the first insulation layer (320) and the floor slab (310).

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