Green roof structure with rainwater collecting function and construction method thereof

Abstract

The invention relates to a green roof structure with a rainwater collection function and a construction method thereof.The green roof structure comprises a house body, the house body is provided with an inclined roof part, the side wall of the house body is provided with a confluence part, the confluence part is provided with a confluence groove, the confluence part is provided with a drainage pipe and a water collection pipe, and the bottom of the confluence groove is provided with a drainage box; a communicating channel is arranged at one end, close to the bottom of the converging groove, of the drainage box, the drainage box is provided with a sliding groove, the elastic piece is provided with a sliding block, the sliding block slides in the drainage box, and the sliding block is provided with a first communicating pipe and a second communicating pipe. According to the application, the drainage pipe and the water collecting pipe are arranged, and the first communicating pipe and the second communicating pipe are indirectly controlled to move through the sliding block by means of the rain vigor, so that rainwater scouring the pitched roof enters the drainage pipe together with broken stones and impurities during raining; at the moment, rainwater with few gravels and impurities enters the water tank, and follow-up water use is facilitated.

Description

Technical Field

[0001] This application relates to the field of roof structures, and in particular to a green roof structure with rainwater harvesting function and its construction method. Background Technology

[0002] The building drainage system is an important component of the building structure, and its performance directly affects the building's service life, safety, and living comfort.

[0003] Referring to Chinese invention patent CN112568021A, a green ecological decorative roof is disclosed, which includes a roof surface, a support frame fixedly connected to the roof surface, a first water tank fixedly fixed on the support frame, a planting box set on one side of the support frame, the planting box containing cultivation soil, a support block fixedly connected between the planting box and the roof surface to support the planting box, a first watering component set between the first water tank and the planting box, the first watering component including a first water inlet pipe and a first valve installed on the first water inlet pipe, a seepage hole opened on the bottom wall of the planting box, a parapet wall fixedly connected to the periphery of the roof surface, a drainage hole opened on the side wall of the parapet wall, a downpipe fixedly connected to the side wall of the parapet wall, the downpipe communicating with the drainage hole, a second water tank set on the ground, a third connecting pipe connected between the second water tank and the first water tank, and a first water pump set on the third connecting pipe.

[0004] In real life, rooftops often contain gravel and impurities. When rainwater falls onto the roof and is collected directly, some of this gravel and impurities end up in the water tank, affecting subsequent water usage. This situation needs improvement. Summary of the Invention

[0005] To reduce the amount of gravel and impurities entering the water tank, this application provides a green roof structure with rainwater harvesting function and its construction method.

[0006] This application provides a green roof structure with rainwater harvesting function, which adopts the following technical solution:

[0007] A green roof structure with rainwater harvesting function includes a roof body with a sloping roof section. A rainwater collection section is located on the side wall of the roof body. The sloping roof section extends downwards along the centerline of the roof body in the direction of the rainwater collection section. The rainwater collection section has a collection trough for rainwater collection. The rainwater collection section includes a drain pipe and a collection pipe, both located at the end of the rainwater collection section away from the sloping roof section. The drain pipe connects to the rainwater collection trough and is used for rainwater discharge. The collection pipe connects to the rainwater collection trough and is used to connect to a water tank. A drainage box is located at the bottom of the rainwater collection trough, and a connecting channel is located at the end of the drainage box near the bottom of the rainwater collection trough. The drainage box has a sliding groove. The sliding trough has an elastic element at its bottom, and a sliding block is provided on the elastic element. The sliding block slides on the drainage box in a vertical direction. The sliding block has a water collection trough for rainwater to flow into, and the bottom of the water collection trough has several drainage holes for rainwater to drain out. The sliding block has a connecting pipe one and a connecting pipe two. The connecting pipe one connects the connecting channel and the drainage pipe, and the connecting pipe two connects the connecting channel and the water collection pipe. When the sliding block is in its initial position, the connecting pipe one connects the connecting channel and the drainage pipe, and the connecting pipe two does not connect the channel and the water collection pipe. When rainwater enters the sliding block and causes it to move downward, the connecting pipe two connects the channel and the water collection pipe.

[0008] By adopting the above technical solution, drainage pipes and collection pipes are installed. When it starts to rain, rainwater enters the collection trough and confluence trough along the sloping roof. The intensity of the rain makes the drainage speed of the collection trough less than the inflow speed. Connecting pipe one connects the connecting channel and the drainage pipe. Rainwater mixed with gravel and impurities from the sloping roof and the confluence trough enters the collection pipe and is discharged, facilitating roof drainage and reducing the amount of gravel and impurities entering the water tank. As the rainwater continues to fall, the sliding block moves towards the bottom of the confluence trough. At this time, connecting pipe one and connecting pipe two move down together. When connecting pipe two moves to the point where the connecting channel connects with the collection pipe, rainwater enters the water tank through connecting pipe two. Since the rainwater has already washed over the sloping roof and the confluence trough, the rainwater entering the water tank through connecting pipe two contains less gravel and impurities, facilitating subsequent water use in the water tank.

[0009] Optionally, the first connecting pipe is provided with a connecting port located on one side wall of the connecting pipe, and the connecting port is used to guide rainwater from the connecting channel into the drainage pipe; the second connecting pipe is provided with a water collection port located on the side wall of the second connecting pipe, and the distance between the water collection port and the bottom of the confluence channel is greater than the distance between the connecting port and the bottom of the confluence channel, and the water collection port is used to guide rainwater from the connecting channel into the water collection pipe.

[0010] By adopting the above technical solution, the distance between the water inlet and the bottom of the confluence channel is set to be greater than the distance between the connecting port and the bottom of the confluence channel. When the sliding block is in the initial position, the connecting port connects the drain pipe and the connecting channel, which facilitates the discharge of rainwater. When the sliding block moves closer to the bottom of the confluence channel, the water inlet connects the connecting channel and the water collection pipe. At this time, the connecting port does not connect the drain pipe and the connecting channel. Therefore, rainwater enters the water collection pipe through the water inlet, which facilitates the collection of rainwater.

[0011] Optionally, the connecting pipe is provided with a discharge port, which is located on one side wall of the connecting pipe near the sliding block. The distance between the discharge port and the bottom of the collecting trough is greater than the distance between the water inlet and the bottom of the collecting trough. The discharge port is used to guide rainwater from the connecting channel into the drainage pipe.

[0012] By adopting the above technical solution, an outlet is set up, and the distance between the outlet and the bottom of the confluence channel is greater than the distance between the collection outlet and the bottom of the confluence channel. Therefore, when the water tank finishes collecting rainwater, the water level in the confluence channel rises because it can no longer collect rainwater. When the water level rises to the height of the outlet, the rainwater is discharged through the outlet and along the drain pipe, thereby reducing the situation of excessive water accumulation in the confluence channel.

[0013] Optionally, the elastic element includes a return spring, one end of which is connected to the bottom of the sliding groove, and the other end is connected to a sliding block. The elastic force of the return spring restricts the sliding block from moving towards the bottom of the sliding groove.

[0014] By adopting the above technical solution, a reset spring is set up. The reset spring is used to reset the sliding block, which facilitates the subsequent sliding of the connecting pipe one and the connecting pipe two. It also facilitates the gradual reset of the sliding block after the rain intensity decreases to the point that the drainage rate of the water collection tank is greater than the inflow rate, thereby facilitating the reconnection of the connecting port and the drainage pipe.

[0015] Optionally, the sliding block is provided with a cover plate, which is located at the end of the sliding block away from the bottom of the confluence channel. The cover plate is used to cover the water collection tank, and the cover plate is provided with a through hole for guiding liquid into the water collection tank.

[0016] By adopting the above technical solution and setting a cover plate, the situation of gravel and impurities entering the water collection tank and causing blockage of the drainage hole is reduced, making the drainage of the sliding block more stable, thereby facilitating the control of the sliding of connecting pipe one and connecting pipe two.

[0017] Optionally, the cover plate includes a first inclined plate and a second inclined plate, the first inclined plate extending upward in a direction close to the center of the sliding block, and the second inclined plate extending upward in a direction close to the center of the sliding block until it abuts against the first inclined plate.

[0018] By adopting the above technical solution, inclined plate one and inclined plate two are set. The inclined surfaces of inclined plate one and inclined plate two facilitate the rolling off of gravel and impurities, thereby reducing their accumulation on the cover plate and making the liquid inlet of the through hole more stable.

[0019] Optionally, the sliding groove wall is provided with a sliding protrusion, the length direction of the sliding protrusion is vertical, and the sliding block is provided with a sliding groove for the sliding protrusion to be inserted.

[0020] By adopting the above technical solution, and setting sliding protrusions and sliding grooves, the shaking of the sliding block during sliding is reduced, making the sliding of the sliding block more stable.

[0021] Secondly, this application provides a construction method for a green roof structure with rainwater harvesting function, which adopts the following technical solution, including the aforementioned green roof structure with rainwater harvesting function, and further includes the following steps:

[0022] S1: A reserved groove is made in the side wall of the roof for the installation of the junction box;

[0023] S2: Construction structure: The manifold has two pre-drilled holes, one for connecting the drain pipe and the other for connecting the collection pipe. The manifold is then embedded into the pre-drilled groove and temporarily fixed.

[0024] S3: Casting: The manifold is fixed by using a formwork and the connection between the manifold and the roof is fixed by casting;

[0025] S4: Remove the formwork after pouring and conduct a load-bearing strength test on the junction.

[0026] S5: Install the drainage box so that connecting pipe one connects to the drain pipe and connecting pipe two connects to the water collection pipe, and fix the drainage box.

[0027] By adopting the above technical solution and this construction method, corresponding reserved slots and holes are reserved to facilitate the installation of the busbar and other components.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. Install drainage pipes and water collection pipes. The movement of connecting pipe one and connecting pipe is indirectly controlled by the rain pressure. This allows rainwater, mixed with gravel and impurities, to enter the drainage pipe when it rains on the sloping roof. When the sliding block moves to connecting pipe two and connects the water collection pipe and the connecting channel, the rainwater with less gravel and impurities enters the water tank, which is convenient for subsequent water use.

[0030] 2. The distance between the water inlet and the bottom of the confluence channel is set to be greater than the distance between the connecting outlet and the bottom of the confluence channel. When the sliding block is in the initial position, the connecting outlet connects the drain pipe and the connecting channel, which facilitates rainwater discharge. As the sliding block moves closer to the bottom of the confluence channel, the water inlet connects the connecting channel and the water collection pipe. At this time, the connecting outlet is not connected to the drain pipe and the connecting channel. Therefore, rainwater enters the water collection pipe through the water inlet, which facilitates rainwater collection.

[0031] 3. Set up inclined plate one and inclined plate two. The inclined surfaces of inclined plate one and inclined plate two facilitate the rolling off of gravel and impurities, thereby reducing their accumulation on the cover plate and making the liquid inlet of the through hole more stable. Attached Figure Description

[0032] Figure 1 This is an overall schematic diagram of an embodiment.

[0033] Figure 2 yes Figure 1 An enlarged diagram of A in the diagram.

[0034] Figure 3 This is a side view of the drainage box.

[0035] Figure 4 This is an exploded diagram of the drainage box.

[0036] Explanation of reference numerals in the attached drawings: 1. Roof; 2. Sloping roof; 3. Convergence section; 4. Convergence channel; 5. Drainage pipe; 6. Water collection pipe; 7. Drainage box; 8. Sliding groove; 9. Elastic element; 10. Sliding block; 11. Sliding protrusion; 12. Sliding groove; 13. Water collection trough; 14. Drainage hole; 15. Cover plate; 151. Sloping plate one; 152. Sloping plate two; 16. Through hole; 17. Connecting channel; 18. Connecting pipe one; 19. Connecting pipe two; 20. Connecting port; 21. Outlet; 22. Water collection port. Detailed Implementation

[0037] The present application will be further described in detail below with reference to the accompanying drawings.

[0038] This application discloses a green roof structure with rainwater harvesting function. (Refer to...) Figures 1 to 4 The system includes a roof structure 1, which has a sloping roof section 2. A rainwater collection section 3 is located on the side wall of the roof structure 1. The sloping roof section 2 extends downwards along the centerline of the roof structure 1 in the direction of the rainwater collection section 3. The rainwater collection section 3 has a collection channel 4 for collecting rainwater, facilitating the collection of normally falling rainwater and rainwater flowing down from the sloping roof section 2. The rainwater collection section 3 has a drain pipe 5 and a collection pipe 6, both located at the end of the rainwater collection section 3 furthest from the sloping roof section 2. The drain pipe 5 connects to the collection channel 4 and is used for rainwater discharge. The collection pipe 6 connects to the collection channel 4 and is used to connect to a water tank.

[0039] A drainage box 7 is provided at the bottom of the manifold 4, and the drainage box 7 is positioned above the drain pipe 5. The drainage box 7 has a sliding groove 8 located at the end of the drainage box away from the bottom of the manifold 4. An elastic element 9 is provided at the bottom of the sliding groove 8, and a sliding block 10 is provided at the end of the elastic element 9 away from the bottom of the sliding groove 8. The sliding block 10 slides on the drainage box 7 in a vertical direction. In this application, the elastic element 9 is a return spring, with one end connected to the bottom of the sliding groove 8 and the other end connected to the sliding block 10. The elastic force of the return spring restricts the sliding block 10 from moving towards the bottom of the sliding groove 8.

[0040] The sliding groove 8 has a sliding protrusion 11 on its wall. The length direction of the sliding protrusion 11 is vertical. The sliding block 10 has a sliding groove 12 for the sliding protrusion 11 to be inserted.

[0041] The sliding block 10 is provided with a water collection trough 13, which allows rainwater to flow in. The bottom of the water collection trough 13 has several drainage holes 14 for rainwater discharge. The sliding block 10 is provided with a cover plate 15, located at the end of the sliding block 10 furthest from the bottom of the confluence channel 4. The cover plate 15 is used to cover the water collection trough 13 to reduce the entry of gravel and impurities into the water collection trough 13 and to reduce blockage of the drainage holes 14. The cover plate 15 includes a first inclined plate 151 and a second inclined plate 152. The first inclined plate 151 extends upwards along a direction close to the center of the sliding block 10, and the second inclined plate 152 extends upwards along a direction close to the center of the sliding block 10 until it abuts against the first inclined plate 151. In this application, both inclined plate 151 and inclined plate 152 are provided with through holes 16. The through holes 16 penetrate inclined plate 151 and inclined plate 152 in a vertical direction. The through holes 16 are used to guide liquid into the water collection tank 13 and reduce the entry of gravel and impurities.

[0042] The diversion box 7 has a connecting channel 17 at one end near the bottom of the confluence channel 4. The sliding block 10 has a connecting pipe 18 and a connecting pipe 2 19. The connecting pipe 18 connects the connecting channel 17 to the drain pipe 5, and the connecting pipe 2 19 connects the connecting channel 17 to the collection pipe 6. The connecting pipe 18 has a connecting port 20 and a discharge port 21, both located on the side wall of the connecting pipe 18. The discharge port 21 is located on the side wall of the connecting pipe 18 near the sliding block 10. The connecting port 20 guides rainwater from the connecting channel 17 into the drain pipe 5. The connecting pipe 2 19 has a collection port 22, located on the side wall of the connecting pipe 2 19. The distance from the collection port 22 to the bottom of the confluence channel 4 is greater than the distance from the connecting port 20 to the bottom of the confluence channel 4. The collection port 22 guides rainwater from the connecting channel 17 into the collection pipe 6. The distance between the outlet 21 and the bottom of the confluence channel 4 is greater than the distance between the collection outlet 22 and the bottom of the confluence channel 4. The outlet 21 is used to guide rainwater from the connecting channel 17 into the drainage pipe 5.

[0043] When the sliding block 10 is in the initial position, the connecting pipe 18 connects the connecting channel 17 and the drain pipe 5, while the connecting pipe 2 19 does not connect the channel 17 and the water collection pipe 6. When rainwater enters the water collection trough 13 and the drainage speed of the water collection trough 13 is less than the inflow speed, the sliding block 10 gradually descends, causing the connecting pipe 2 19 to connect the channel 17 and the water collection pipe 6. At this time, rainwater enters the water collection pipe 6 through the connecting pipe 2 19, which facilitates rainwater collection.

[0044] The implementation principle of a green roof structure with rainwater harvesting function according to an embodiment of this application is as follows: In actual use, when it is not raining or just starting to drizzle, when the sliding block 10 is in its initial position, the connecting pipe 18 connects the connecting channel 17 and the drainage pipe 5, and the rainwater gradually converges. As the rainfall intensifies, when the rainwater enters the water collection trough 13 and the drainage speed of the water collection trough 13 is less than the inflow speed, the sliding block 10 gradually descends, causing the connecting pipe 19 to connect the channel 17 and the water collection pipe 6. During this period, the rainwater washes the sloping roof 2 and the confluence trough 4, causing gravel and impurities to be discharged through the drainage pipe 5.

[0045] When the sliding block 10 moves to connect the water inlet 22 with the connecting channel 17 and the water collection pipe 6, the lower end of the water inlet 22 is flush with the bottom wall of the confluence trough 4, and the liquid enters the water collection pipe 6 along the water inlet 22, thus facilitating rainwater collection.

[0046] A construction method for a green roof structure with rainwater harvesting function, comprising the aforementioned green roof structure with rainwater harvesting function, and further comprising the following steps:

[0047] S1: Side wall treatment of roof 1: Reserved groove for installation of the junction 3 is reserved on the side wall of roof 1;

[0048] S2: Construction structure: The manifold 3 has two pre-reserved holes, one for connecting the drain pipe 5 and the other for connecting the water collection pipe 6. The manifold 3 is embedded into the pre-reserved groove and temporarily fixed.

[0049] S3: Casting: The manifold 3 is fixed by the template, and the connection between the manifold 3 and the roof 1 is fixed by casting the reserved groove;

[0050] S4: After pouring, remove the formwork and conduct a load-bearing test on the side of the confluence 3 away from the side wall of the roof 1 to test the structural strength;

[0051] S5: Install the drainage box 7 so that the connecting pipe 18 connects to the drain pipe 5 and the connecting pipe 2 19 connects to the water collection pipe 6, and fix the drainage box 7.

[0052] The implementation principle of the construction method of a green roof structure with rainwater harvesting function in this application embodiment is as follows: the connection between the water collection part 3 and the roof body 1 is made by pouring concrete to improve the stability of the connection.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A green roof structure with rainwater collection function, comprising a roof body (1), characterized in that: The roof (1) is provided with a sloping roof part (2), the roof (1) side wall is provided with a flow collection part (3), the sloping roof part (2) extends downward along the center line of the roof (1) along the direction of the flow collection part (3), the flow collection part (3) is provided with a flow collection groove (4), the flow collection groove (4) is used for rainwater flow collection, the flow collection part (3) is provided with a drain pipe (5) and a water collecting pipe (6), the drain pipe (5) and the water collecting pipe (6) are located at one end of the flow collection part (3) away from the sloping roof part (2), the drain pipe (5) is communicated with the flow collection groove (4), the drain pipe (5) is used for rainwater discharge, the water collecting pipe (6) is communicated with the flow collection groove (4), and the water collecting pipe (6) is used for connecting a water tank; The flow collection groove (4) is provided with a drainage box (7), one end of the drainage box (7) close to the bottom of the flow collection groove (4) is provided with a communication channel (17), the drainage box (7) is provided with a sliding groove (8), the bottom of the sliding groove (8) is provided with an elastic element (9), the elastic element (9) is provided with a sliding block (10), the sliding block (10) slides in the drainage box (7), the sliding direction of the sliding block (10) is a vertical direction, the sliding block (10) is provided with a water collecting groove (13), the water collecting groove (13) is used for rainwater inflow, and the bottom of the water collecting groove (13) is provided with a plurality of drainage holes (14); the drainage holes (14) are used for rainwater discharge; The sliding block (10) is provided with a communication pipe one (18) and a communication pipe two (19), the communication pipe one (18) is used for communication between the communication channel (17) and the drain pipe (5), and the communication pipe two (19) is used for communication between the communication channel (17) and the water collecting pipe (6); when the sliding block (10) is in the initial position, the communication pipe one (18) is communicated with the communication channel (17) and the drain pipe (5), and the communication pipe two (19) is not communicated with the channel (17) and the water collecting pipe (6); when rainwater enters the sliding block (10) and makes the sliding block (10) move downward, the communication pipe two (19) is communicated with the channel (17) and the water collecting pipe (6).

2. The green roof structure having a rainwater collecting function according to claim 1, wherein: The communication pipe one (18) is provided with a communication port (20), the communication port (20) is located on the side wall of the communication pipe one (18), and the communication port (20) is used for guiding rainwater in the communication channel (17) to enter the drain pipe (5); the communication pipe two (19) is provided with a water collecting port (22), the water collecting port (22) is located on the side wall of the communication pipe two (19), the distance between the water collecting port (22) and the bottom of the flow collection groove (4) is greater than that between the communication port (20) and the bottom of the flow collection groove (4), and the water collecting port (22) is used for guiding rainwater in the communication channel (17) to enter the water collecting pipe (6). 3.The green roof structure with rainwater collection function according to claim 2, characterized in that: The communication pipe one (18) is provided with a flow releasing port (21), the flow releasing port (21) is located on one side of the side wall of the communication pipe one (18) close to the sliding block (10), the distance between the flow releasing port (21) and the bottom of the flow collection groove (4) is greater than that between the water collecting port (22) and the bottom of the flow collection groove (4), and the flow releasing port (21) is used for guiding rainwater in the communication channel (17) to enter the drain pipe (5). 4.The green roof structure with rainwater collection function according to claim 2, characterized in that: The elastic member (9) comprises a return spring, one end of which is connected to the bottom of the sliding groove (8), and the other end of which is connected to the sliding block (10), and the elastic force of the return spring limits the movement of the sliding block (10) towards the bottom of the sliding groove (8). 5.The green roof structure with rainwater collection function according to claim 1, characterized in that: The sliding block (10) is provided with a cover plate (15) located at one end of the sliding block (10) away from the bottom of the collecting groove (4), the cover plate (15) is used to cover the water collecting groove (13), and the cover plate (15) is provided with a through hole (16) for guiding the liquid into the water collecting groove (13). 6.The green roof structure with rainwater collection function according to claim 5, characterized in that: The cover plate (15) comprises an inclined plate one (151) and an inclined plate two (152), the inclined plate one (151) extends upwards along the direction close to the center of the sliding block (10), and the inclined plate two (152) extends upwards along the direction close to the center of the sliding block (10) to abut against the inclined plate one (151). 7.The green roof structure with rainwater collecting function according to claim 1, characterized in that: The sliding groove (8) is provided with a sliding convex strip (11) in the vertical direction, and the sliding block (10) is provided with a sliding embedding groove (12) for embedding the sliding convex strip (11).

8. A method of constructing a green roof structure having a rainwater collection function according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1: reserving a reserved groove for installing the collecting part (3) on the side wall of the house body (1); S2: building structure: the collecting part (3) is provided with two reserved holes in advance, one of which is used for connecting the drain pipe (5), and the other of which is used for connecting the water collecting pipe (6), the collecting part (3) is embedded into the reserved groove, and is temporarily fixed; S3: pouring: the collecting part (3) is fixed by a template, and the connection between the collecting part (3) and the house body (1) is fixed by pouring; S4: removing the template after pouring, and testing the bearing strength of the collecting part (3); S5: installing the drainage box (7) so that the communication pipe one (18) communicates with the drain pipe (5), the communication pipe two (19) communicates with the water collecting pipe (6), and the drainage box (7) is fixed.

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