A permeable drainage channel for a planted roof

Abstract

The utility model relates to the civil engineering technical field discloses a kind of permeable drainage ditches for planting roof, including ditch body, the inner wall of ditch body is fixedly connected with baffle, the outer wall one end of baffle is fixedly connected with baffle, long hole, middle hole and micro hole are penetrated and set from top to bottom in the inside of ditch body, the outer wall of ditch body is fixedly connected with multiple longitudinal reinforcing bars, and wave plate is fixedly connected between two longitudinal reinforcing bars. In the utility model, by reasonably setting baffle and baffle in the inside of ditch body, water storage area and drainage area are effectively divided, and different size penetration holes distributed from top to bottom are combined, the orderly penetration and efficient discharge of rainwater are realized, this structure not only can effectively filter and prevent planting soil loss, but also can temporarily store part of rainwater during heavy rain, relieve drainage pressure, while enhancing the structural stability and durability of drainage ditch whole, suitable for various planting roof systems.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering technology, and in particular to a permeable drainage ditch for green roofs. Background Technology

[0002] As a form of green building, green roofs can effectively improve the urban thermal environment, enhance building energy efficiency, and extend the service life of roofs. Their system structure is complex and needs to take into account multiple requirements such as planting, waterproofing, and drainage. Among them, the drainage system is a key component to ensure the long-term stable operation of green roofs. In particular, drainage ditches that can achieve both infiltration and drainage functions play an important role in maintaining the healthy growth of plants and preventing water accumulation from damaging the waterproof layer.

[0003] In existing technologies, green roof drainage systems mostly adopt traditional linear drainage ditches or blind pipe drainage methods. These drainage ditches are usually precast concrete or plastic trench structures with a single drainage channel inside, and covered with a grid cover or gravel layer on top. Their technical principle mainly relies on the slope of the trench itself to collect rainwater and drain it away through the outlets at the bottom or side. Some products will fill the trench with gravel or wrap it with geotextile to try to achieve a certain filtration and infiltration function.

[0004] However, the existing drainage ditch structures mentioned above are usually single-function and lack the ability to guide and classify rainwater in an orderly manner. In the event of heavy rainfall, rainwater quickly gathers and flows through the drainage ditch, making it difficult to effectively filter fine soil particles. This can easily lead to silt entering the drainage system with the water flow, causing blockages. At the same time, a large amount of rainwater cannot infiltrate or drain in time, which can easily form instantaneous water accumulation on the roof, increasing the load on the waterproof layer and the risk to the roof structure. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a permeable drainage ditch for green roofs, aiming to improve the problem that drainage ditch structures are usually single-function.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a permeable drainage ditch for a green roof, comprising a ditch body, a partition fixedly connected to the inner wall of the ditch body, a baffle fixedly connected to one end of the outer wall of the partition, an elongated hole, a medium hole and a micro hole extending through the ditch body from top to bottom, a plurality of longitudinal reinforcing ribs fixedly connected to the outer wall of the ditch body, and a corrugated plate fixedly connected between two of the longitudinal reinforcing ribs.

[0007] Through the above technical solution, the ditch body serves as the core drainage and infiltration channel. The internal baffles and barriers work together to divide different functional areas, while the through holes of different sizes distributed from top to bottom can realize the graded infiltration and efficient discharge of rainwater. At the same time, the longitudinal reinforcing ribs and corrugated plates on the outer wall significantly enhance the structural strength and deformation resistance of the ditch body, ensuring its long-term stability and drainage reliability under soil load and complex environment.

[0008] Preferably, the area surrounded by the ditch, partitions, and baffles is a water storage area, and the area between the two partitions is a drainage area.

[0009] Through the above technical solution, the clearly defined water storage area can temporarily store some rainwater during heavy rain, alleviating the instantaneous drainage pressure, while the drainage area ensures the rapid drainage of water. The two work together to achieve the regulation and orderly management of rainwater on the roof, effectively reducing the risk of water accumulation.

[0010] Preferably, a cover plate is provided above the trench.

[0011] Through the above technical solutions, the cover plate can effectively prevent large debris or fallen leaves from entering the ditch and causing blockage, while facilitating daily maintenance and cleaning, and ensuring the long-term unobstructed flow of the drainage system.

[0012] Preferably, the two sides of the ditch are planting soil layers, and a non-woven fabric is placed between the ditch and the planting soil layers.

[0013] Through the above technical solutions, non-woven fabric acts as a highly efficient filtration barrier, allowing water to pass through freely while effectively preventing fine soil particles in the planting soil layer from entering the drainage ditch, thus fundamentally preventing clogging problems inside the ditch.

[0014] Preferably, the lower layer of the trench is a protective layer, the lower layer of the protective layer is a waterproof layer, and the lower layer of the waterproof layer is a structural board.

[0015] Through the above technical solution, this layered structure provides comprehensive protection for the entire green roof system. The protective layer buffers the potential damage of the upper load to the waterproof layer, the waterproof layer ensures fundamental waterproofing performance, and the structural panel provides a solid foundation for load-bearing, together ensuring the safety and durability of the roof.

[0016] Preferably, the protective layer is a non-woven geotextile or a felt mat.

[0017] The above technical solution uses non-woven geotextile or felt as a protective layer. Due to its good permeability, abrasion resistance and puncture resistance, it can effectively protect the underlying waterproof layer from damage by backfill soil and plant roots.

[0018] Preferably, the waterproof layer is a polymer waterproof membrane or a modified bitumen waterproof membrane, and the structural slab is an extruded polystyrene board and a reinforced concrete floor slab.

[0019] Through the above technical solutions, the high-performance waterproof membrane provides a reliable and durable waterproof seal, the underlying extruded polystyrene board provides excellent thermal insulation performance, and the reinforced concrete floor slab ensures that the entire roof structure has sufficient strength and stability.

[0020] Preferably, one end of the groove is a protruding interface and the other end of the groove is a recessed interface, and the protruding interface and the recessed interface are engaged and connected.

[0021] Through the above technical solution, the interlocking connection design of the protruding interface and the recessed interface allows multiple drainage ditch units to be quickly and easily assembled on site, adapting to the drainage needs of roofs of different lengths and shapes, and greatly improving construction efficiency and system integrity.

[0022] This utility model has the following beneficial effects: 1. In this utility model, by reasonably setting partitions and baffles inside the ditch, the water storage area and the drainage area are effectively divided. Combined with the different sized through holes distributed from top to bottom, the orderly infiltration and efficient discharge of rainwater are achieved. This structure can not only effectively filter and prevent the loss of planting soil, but also temporarily store some rainwater during heavy rain to relieve drainage pressure. At the same time, it enhances the overall structural stability and durability of the drainage ditch and is suitable for various green roof systems.

[0023] 2. In this utility model, a modular design is adopted. Through the clever interlocking connection of the protruding interface and the recessed interface, the drainage ditch can be quickly and seamlessly spliced ​​and installed. The construction is simple and adaptable. With the longitudinal reinforcing ribs and corrugated plates set on the outer wall of the ditch, the compressive strength and overall rigidity of the drainage ditch are improved, ensuring long-term performance under soil load. At the same time, the corrugated structure further optimizes the water flow path and improves drainage efficiency and reliability. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of a permeable drainage ditch for a green roof proposed in this utility model; Figure 2 This is a schematic diagram of the ditch body structure of a permeable drainage ditch for a green roof proposed in this utility model; Figure 3 This is a schematic diagram of the longitudinal reinforcing rib of a permeable drainage ditch for a green roof proposed in this utility model; Figure 4 This is a schematic diagram of the corrugated plate portion of a permeable drainage ditch for a green roof proposed in this utility model; Figure 5This is a schematic diagram of the geotextile structure of a permeable drainage ditch for a green roof proposed in this utility model.

[0025] Legend: 1. Trench body; 2. Protruding interface; 3. Recessed interface; 4. Corrugated plate; 5. Long hole; 6. Medium hole; 7. Micro hole; 8. Longitudinal reinforcing rib; 9. Partition plate; 10. Baffle plate; 11. Cover plate; 12. Non-woven fabric; 13. Planting soil layer; 14. Protective layer; 15. Waterproof layer; 16. Structural plate. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail below.

[0027] Reference Figures 1-5 This utility model provides an embodiment of a permeable drainage ditch for a green roof, comprising a ditch body 1 as the main load-bearing structure. A partition 9, which physically divides the interior of the ditch body 1 into different functional areas, is fixedly connected to the inner wall of the ditch body 1. A baffle 10, which works in conjunction with the partition 9 to form a closed spatial partition, is fixedly connected to one end of the outer wall of the partition 9. The ditch body 1 has elongated holes 5, medium-sized holes 6, and micro-sized holes 7 extending from top to bottom. These holes of different sizes constitute a graded filtration system. The elongated holes 5 first intercept larger soil particles or impurities, while the medium-sized holes 6 and micro-sized holes 7 gradually filter fine silt and sand, ensuring smooth rainwater infiltration while preventing the loss of planting soil and blockage of the drainage channels. Multiple longitudinal reinforcing ribs 8 are fixedly connected to the outer wall of the ditch body 1, evenly distributed along the length of the ditch body 1, enhancing its resistance to longitudinal compression and bending, and preventing the ditch body 1 from collapsing under the gravity load of the planting soil layer 13. To prevent deformation or breakage, a corrugated plate 4 is fixedly connected between the two longitudinal reinforcing ribs 8 to enhance the lateral stiffness of the ditch body 1. The area enclosed by the ditch body 1, partitions 9, and baffles 10 is a water storage area, which can temporarily store some rainwater during heavy rain. The stored rainwater can slowly infiltrate into the planting soil layer 13 to replenish water for plant growth. The area enclosed between the two partitions 9 is a drainage area, serving as the main discharge channel for rainwater. The clean water buffered and filtered by the water storage area is quickly discharged from the roof to ensure smooth drainage. A cover plate 11 is installed above the ditch body 1 to cover the top of the ditch body 1 and prevent large debris such as fallen leaves and stones from falling into the ditch and causing blockage. The two sides of the ditch body 1 are planting soil layers 13 for planting green plants. A non-woven fabric 12 is installed between the ditch body 1 and the planting soil layer 13 as an isolation layer between the soil and the ditch body 1. This can prevent fine particles in the planting soil layer 13 from entering the ditch body 1 and blocking the channels, while not affecting the infiltration of rainwater into the ditch.

[0028] Specifically, partition 9 and baffle 10 divide the water storage area and drainage area, the graded holes and non-woven fabric form a double filter, the longitudinal reinforcing ribs 8 and corrugated plate 4 ensure structural strength, cover plate 11 prevents debris from clogging, and planting soil layer 13 takes into account both greening and preliminary filtration. The overall design solves the problems of traditional drainage ditches having a single function and being easy to clog. While draining water efficiently, it protects the planting soil from being lost and can also temporarily store rainwater to replenish water for plants, adapting to the composite needs of green roofs.

[0029] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 The lower layer of the trench 1 is a protective layer 14 laid directly on top of the waterproof layer 15. This protective layer buffers the physical friction and pressure between the trench 1 and the planting soil layer 13 on the waterproof layer 15. Below the protective layer 14 is the waterproof layer 15, which prevents rainwater from penetrating to the roof structure and eroding the main building. Below the waterproof layer 15 is a structural slab 16, which serves as the foundation support layer for the green roof, bearing all loads from the trench 1, planting soil layer 13, and rainwater. The protective layer 14 is made of non-woven geotextile or felt, which has good breathability and wear resistance. It effectively buffers pressure without hindering rainwater penetration, and is also low in cost and easy to construct. The waterproof layer 15 is made of polymer. Waterproof membrane or modified bitumen waterproof membrane, both materials can resist rainwater erosion for a long time. Structural slab 16 is made of extruded polystyrene board and reinforced concrete floor slab. Extruded polystyrene board has the characteristics of being lightweight, heat-insulating and compressive-resistant, which can reduce the overall weight of the roof and improve the building's energy efficiency. The reinforced concrete floor slab provides high-strength load-bearing capacity. One end of the ditch 1 has a protruding interface 2, and the other end has a recessed interface 3. The protruding interface 2 and the recessed interface 3 are interlocked to realize the rapid splicing of the drainage ditch unit. The length of the drainage ditch can be flexibly adjusted according to the roof size to adapt to green roofs of different areas and shapes, while reducing construction difficulty and improving installation efficiency.

[0030] Specifically, the protective layer, waterproof layer, and structural slab form a multi-layered protection system that buffers damage, blocks leakage, and bears loads, ensuring the long-term stability of the roof. The interlocking design of the protruding and recessed interfaces enables the rapid splicing and sealing of the drainage ditch, adapting to different roof scenarios. The overall design not only solves the waterproofing and structural safety issues of green roofs but also improves the construction adaptability of the drainage ditch, providing technical support for the large-scale application of green roofs.

[0031] Working principle: When using this type of permeable drainage ditch for green roofs, firstly, multiple ditch bodies 1 are connected by interlocking the protruding interface 2 at one end to the recessed interface 3 of another ditch body 1, quickly assembling the required drainage ditch system. After assembly, it is laid on the roof structure slab 16, and the waterproof layer 15 is tightly adhered to the bottom and surrounding area of ​​the ditch body 1 to ensure overall waterproofing. Subsequently, a protective layer 14 is covered on top of the ditch body 1 to prevent soil particles from the planting soil layer 13 from entering the ditch. The planting soil layer 13 is laid on both sides of the ditch body 1 and covers the pre-reserved planting area on top of the ditch body 1. In the planting area, during rainfall, rainwater carries some mud and sand into the interior of the ditch 1. The partition 9 and baffle 10 divide the space inside the ditch into a water storage area and a drainage area, thereby guiding and buffering the water flow. As the water flows in the ditch, it passes through the elongated holes 5, medium-sized holes 6 and micro holes 7 that run from top to bottom, achieving graded infiltration and filtration, effectively preventing soil loss and draining clean water. At the same time, the multiple longitudinal reinforcing ribs 8 set on the outer wall of the ditch and the corrugated plates 4 connected thereto significantly enhance the structural strength and deformation resistance of the ditch 1, ensuring its long-term stable operation under soil load and water flow impact.

Claims

1. A permeable drainage ditch for green roofs, comprising a ditch body (1), characterized in that: The inner wall of the ditch (1) is fixedly connected to a partition (9), and one end of the outer wall of the partition (9) is fixedly connected to a baffle (10). The inside of the ditch (1) is provided with an elongated hole (5), a medium hole (6) and a micro hole (7) running through from top to bottom. The outer wall of the ditch (1) is fixedly connected to a plurality of longitudinal reinforcing ribs (8), and a corrugated plate (4) is fixedly connected between two of the longitudinal reinforcing ribs (8).

2. The permeable drainage ditch for a green roof according to claim 1, characterized in that: The area enclosed by the ditch (1), partition (9) and baffle (10) is a water storage area, and the area enclosed between the two partitions (9) is a drainage area.

3. The permeable drainage ditch for a green roof according to claim 1, characterized in that: A cover plate (11) is provided above the trench (1).

4. A permeable drainage ditch for a green roof according to claim 3, characterized in that: The trench (1) has planting soil layers (13) on both sides, and a non-woven fabric (12) is placed between the trench (1) and the planting soil layers (13).

5. A permeable drainage ditch for a green roof according to claim 1, characterized in that: The lower layer of the trench (1) is a protective layer (14), the lower layer of the protective layer (14) is a waterproof layer (15), and the lower layer of the waterproof layer (15) is a structural plate (16).

6. A permeable drainage ditch for a green roof according to claim 5, characterized in that: The protective layer (14) is a non-woven geotextile or felt mat.

7. A permeable drainage ditch for a green roof according to claim 5, characterized in that: The waterproof layer (15) is a polymer waterproof membrane or a modified bitumen waterproof membrane, and the structural slab (16) is an extruded polystyrene board and a reinforced concrete floor slab.

8. A permeable drainage ditch for a green roof according to claim 5, characterized in that: One end of the groove (1) is a protruding interface (2), and the other end of the groove (1) is a recessed interface (3). The protruding interface (2) and the recessed interface (3) are engaged and connected.

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