A rainwater drainage system and method

Abstract

The present invention discloses a rainwater infiltration and drainage system and method, belonging to the field of sponge city technology, comprising a first infiltration and drainage pipe, a second infiltration and drainage pipe, an overflow well, a first one-way water-permeable membrane wrapped in the first infiltration and drainage pipe, and a second one-way water-permeable membrane wrapped in the second infiltration and drainage pipe, the first infiltration and drainage pipe is connected to the overflow well, and the overflow well is connected to one end of the second infiltration and drainage pipe; the first infiltration and drainage pipe is provided with multiple groups of first infiltration and drainage holes, and the water permeability direction of the first one-way water-permeable membrane is toward the multiple groups of the first infiltration and drainage holes; the second infiltration and drainage pipe is provided with multiple groups of second infiltration and drainage holes, and the water permeability direction of the second one-way water-permeable membrane is toward the multiple groups of the second infiltration and drainage holes. The present invention achieves the technical effect of saving the laying amount of pipes and improving the laying efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of sponge cities, and in particular relates to a rainwater infiltration and drainage system and method. Background Art

[0002] Sponge city is a new generation of urban stormwater management concept. Like a sponge, sponge city has good flexibility in adapting to environmental changes and coping with natural disasters caused by rain. Sponge city requires the city to have the functions of infiltration, retention, storage, purification, use and discharge when it rains.

[0003] At present, in the existing sponge city technology, rainwater usually flows into the inside of the infiltration pipe on rainy days, and the rainwater flowing into the inside of the infiltration pipe is transported to the inside of the drainage pipe, and then transported to the municipal pipeline for drainage through the drainage pipe. However, in the process of transporting rainwater to the municipal pipeline for drainage, the diameter of the infiltration pipe laid to meet the faster infiltration speed is large, and a large number of infiltration pipes and drainage pipes need to be laid, which has low laying efficiency and consumes a lot of pipe materials.

[0004] In summary, the existing sponge city technology has the technical problems of requiring a large amount of pipes and having low laying efficiency. Summary of the invention

[0005] The technical problem to be solved by the present invention is that a large amount of pipes are consumed and the laying efficiency is low.

[0006] In order to solve the above technical problems, the present invention provides a rainwater infiltration and drainage system for treating rainwater in a sunken green space area, the system comprising: a first infiltration and drainage pipe, a second infiltration and drainage pipe and an overflow well arranged in the sunken green space area, the first infiltration and drainage pipe is connected to the overflow well, and the overflow well is connected to one end of the second infiltration and drainage pipe; a first one-way water-permeable membrane wrapped in the first infiltration and drainage pipe, the first infiltration and drainage pipe is provided with a plurality of groups of first infiltration hole groups, and the water permeability direction of the first one-way water-permeable membrane is toward the plurality of groups of first infiltration hole groups; a second one-way water-permeable membrane wrapped in the second infiltration and drainage pipe, the second infiltration and drainage pipe is provided with a plurality of groups of second infiltration hole groups, and the water permeability direction of the second one-way water-permeable membrane is toward the plurality of groups of second infiltration hole groups.

[0007] Furthermore, the system also includes: a rainwater inspection well, and the rainwater inspection well is connected to the other end of the second seepage and drainage pipe.

[0008] Furthermore, the system also includes: a municipal rainwater pipe, which is connected to the rainwater inspection well.

[0009] Furthermore, the first one-way water-permeable membrane is a one-way water-permeable geotextile membrane, and the second one-way water-permeable membrane is a one-way water-permeable geotextile membrane.

[0010] Furthermore, the distance between each two adjacent groups of the first water seepage holes is equal; the first water seepage hole group includes a plurality of first through holes, and the distance between each two adjacent groups of the first through holes is equal.

[0011] Furthermore, the distance between each two adjacent groups of the second water seepage holes is equal; the second water seepage hole group includes a plurality of second through holes, and the distance between each two adjacent second through holes is equal.

[0012] Furthermore, the system also includes: a plant layer; a planting medium layer, the planting medium layer is connected to the plant layer; a non-degradable permeable geotextile layer, the non-degradable permeable geotextile layer is connected to the planting medium layer; a crushed stone and sand layer, the crushed stone and sand layer is connected to the non-degradable permeable geotextile layer; a natural soil layer, the natural soil layer is connected to the crushed stone and sand layer, the first infiltration and drainage pipe is arranged in the natural soil layer, one end of the second infiltration and drainage pipe is arranged in the natural soil layer, the first one-way permeable membrane is arranged in the natural soil layer, and the second one-way permeable membrane is arranged in the natural soil layer.

[0013] According to another aspect of the present invention, the present invention also provides a rainwater infiltration and drainage method, which is applied to the rainwater infiltration and drainage system, and the method includes: rainwater in the sunken green space area passes through a first one-way water-permeable membrane and passes through multiple groups of first infiltration holes to enter a first infiltration and drainage pipe; rainwater is transported to an overflow well through the first infiltration and drainage pipe; rainwater in the overflow well enters a second infiltration and drainage pipe, and rainwater in the sunken green space area passes through a second one-way water-permeable membrane and passes through multiple groups of second infiltration holes to enter a second infiltration and drainage pipe.

[0014] Furthermore, the method also includes: transporting rainwater to a rainwater inspection well through a second seepage drainage pipe.

[0015] Furthermore, the method also includes: transporting the water to the rainwater inspection well and flowing it into a municipal rainwater pipe.

[0016] Beneficial effects:

[0017] The present invention provides a rainwater infiltration and drainage system, which is used for infiltration and drainage of rainwater in a sunken green space area. The system is arranged in the sunken green space area through a first infiltration and drainage pipe, a second infiltration and drainage pipe and an overflow well. The first infiltration and drainage pipe and the overflow well are interconnected, and one end of the overflow well and the second infiltration and drainage pipe are interconnected. A first one-way water-permeable membrane is wrapped on the first infiltration and drainage pipe, and a plurality of first water infiltration hole groups are provided on the first infiltration and drainage pipe, and the water permeability direction of the first one-way water-permeable membrane is toward the plurality of first water infiltration hole groups. A second one-way water-permeable membrane is wrapped on the second infiltration and drainage pipe, and a plurality of second water infiltration hole groups are provided on the second infiltration and drainage pipe, and the water permeability direction of the second one-way water-permeable membrane is toward the plurality of second water infiltration hole groups. In this way, on rainy days, rainwater in the sunken green area will enter the first multiple groups of seepage holes from the first one-way permeable membrane, and then enter the first seepage pipe from the multiple groups of first seepage holes. The rainwater entering the first seepage pipe will flow into the overflow well, and the rainwater flowing into the overflow well will flow into the second seepage pipe. At the same time, rainwater in the sunken green area will enter the second multiple groups of seepage holes from the second one-way permeable membrane, and then enter the second seepage pipe from the multiple groups of second seepage holes. The rainwater entering the second seepage pipe through the multiple groups of second seepage holes will merge with the rainwater flowing into the second seepage pipe from the overflow well, and the merged rainwater will be discharged from the second seepage pipe. Then the rainwater in the sunken green area will infiltrate the first seepage pipe and the second seepage pipe, and the first seepage pipe and the second seepage pipe will discharge the rainwater in the sunken green area. Then, it is realized that only the first seepage drainage pipe and the second seepage drainage pipe need to be laid for the pipe, which can reduce the laying amount of the pipe and improve the laying efficiency, thereby achieving the technical effect of saving the laying amount of the pipe and improving the laying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of a rainwater drainage system provided by an embodiment of the present invention Figure 1 ;

[0020] Figure 2 A schematic diagram of a rainwater drainage system provided by an embodiment of the present invention Figure 2 ;

[0021] Figure 3 A schematic diagram of a rainwater drainage system provided by an embodiment of the present invention Figure 3 ;

[0022] Figure 4 A flow chart of a rainwater infiltration and drainage method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The present invention discloses a rainwater infiltration and drainage system, which is used for infiltration and drainage of rainwater in a sunken green area 7. The system is arranged in the sunken green area 7 through a first infiltration and drainage pipe 1, a second infiltration and drainage pipe 2 and an overflow well 3. The first infiltration and drainage pipe 1 and the overflow well 3 are interconnected, and one end of the overflow well 3 and the second infiltration and drainage pipe 2 are interconnected. A first one-way water-permeable membrane 4 is wrapped on the first infiltration and drainage pipe 1, and a plurality of first infiltration and drainage hole groups 11 are provided on the first infiltration and drainage pipe 1. The water permeability direction of the first one-way water-permeable membrane 4 is toward the plurality of first infiltration and drainage hole groups 11. A second one-way water-permeable membrane is wrapped on the second infiltration and drainage pipe 2, and a plurality of second infiltration and drainage hole groups are provided on the second infiltration and drainage pipe 2. The water permeability direction of the second one-way water-permeable membrane is toward the plurality of second infiltration and drainage hole groups. In this way, on rainy days, rainwater in the sunken green area 7 will enter the first plurality of infiltration holes 11 from the first one-way permeable membrane 4, and then enter the first infiltration and drainage pipe 1 from the first plurality of infiltration holes 11. The rainwater entering the first infiltration and drainage pipe 1 will flow into the overflow well 3, and the rainwater flowing into the overflow well 3 will flow into the second infiltration and drainage pipe 2. At the same time, rainwater in the sunken green area 7 will enter the second plurality of infiltration holes from the second one-way permeable membrane, and then enter the second infiltration and drainage pipe 2 from the second plurality of infiltration holes. The rainwater entering the second infiltration and drainage pipe 2 through the second plurality of infiltration holes will merge with the rainwater flowing into the second infiltration and drainage pipe 2 from the overflow well 3, and the merged rainwater will be discharged from the second infiltration and drainage pipe 2. Then, the rainwater in the sunken green area 7 will infiltrate the first infiltration and drainage pipe 1 and the second infiltration and drainage pipe 2, and the first infiltration and drainage pipe 1 and the second infiltration and drainage pipe 2 will discharge the rainwater in the sunken green area 7. Then, it is realized that only the first seepage drainage pipe 1 and the second seepage drainage pipe 2 need to be laid for the pipes, which can reduce the laying amount of pipes and improve the laying efficiency, thereby achieving the technical effect of saving the laying amount of pipes and improving the laying efficiency.

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention; the "and / or" keyword involved in this implementation represents both and, or. In other words, A and / or B mentioned in the embodiments of the present invention represent both A and B, and A or B, and describe the three states of A and B. For example, A and / or B means: only A is included but not B; only B is included but not A; both A and B are included.

[0025] It should be understood that although the terms "first", "second", etc. can be used here to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section. Spatially related terms such as "below", "above", etc. can be used here to facilitate the description of the relationship between one element or feature and another element or feature. It is understood that in addition to the orientation shown in the figure, spatially relative terms also include different orientations of the device in use or operation. For example, if the device in the figure is turned over, the element or feature described as "below" will be oriented as "above" other elements or features. Therefore, the exemplary term "below" can include both above and below orientations. The device can be oriented (rotated 90 degrees or in other orientations), and the spatially related descriptors used here are interpreted accordingly.

[0026] At the same time, in the embodiments of the present invention, when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a centered component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a centered component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a centered component. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the present invention.

[0027] Embodiment 1

[0028] See also Figure 1 , Figure 2 and Figure 3 , Figure 1 A schematic diagram of a rainwater drainage system provided by an embodiment of the present invention Figure 1 , Figure 2 A schematic diagram of a rainwater drainage system provided by an embodiment of the present invention Figure 2 , Figure 3 A schematic diagram of a rainwater drainage system provided by an embodiment of the present invention Figure 3A rainwater infiltration and drainage system provided by an embodiment of the present invention comprises a first infiltration and drainage pipe 1, a second infiltration and drainage pipe 2 and an overflow well 3 arranged in the sunken green space area 7, a first one-way water-permeable membrane 4 wrapped in the first infiltration and drainage pipe 1, and a second one-way water-permeable membrane wrapped in the second infiltration and drainage pipe 2. The first infiltration and drainage pipe 1, the second infiltration and drainage pipe 2 and the overflow well 3 arranged in the sunken green space area 7, the first one-way water-permeable membrane 4 wrapped in the first infiltration and drainage pipe 1, and the second one-way water-permeable membrane wrapped in the second infiltration and drainage pipe 2 are described in detail respectively:

[0029] For the first seepage and drainage pipe 1, the second seepage and drainage pipe 2, the overflow well 3 and the first one-way permeable membrane 4 wrapped in the first seepage and drainage pipe 1 arranged in the sunken green area 7:

[0030] The first seepage and drainage pipe 1 is connected to the overflow well 3, and the overflow well 3 is connected to one end of the second seepage and drainage pipe 2. The first seepage and drainage pipe 1 is provided with multiple groups of first seepage hole groups 11, and the water permeation direction of the first one-way permeable membrane 4 is toward the multiple groups of the first seepage hole groups 11; the first one-way permeable membrane 4 is a one-way permeable geotextile membrane. The spacing between each two adjacent groups of the first seepage hole groups 11 is equal; the first seepage hole group 11 includes multiple first through holes 111, and the spacing between each two adjacent first through holes 111 is equal. A rainwater infiltration and drainage system provided by an embodiment of the present invention also includes a plant layer, a planting medium layer, a non-degradable permeable geotextile layer, a crushed stone sand-filled layer and a natural soil layer, the planting medium layer is connected to the plant layer; the non-degradable permeable geotextile layer is connected to the planting medium layer; the crushed stone sand-filled layer is connected to the non-degradable permeable geotextile layer; the natural soil layer is connected to the crushed stone sand-filled layer, the first infiltration and drainage pipe 1 is arranged in the natural soil layer, one end of the second infiltration and drainage pipe 2 is arranged in the natural soil layer, the first one-way water-permeable membrane 4 is arranged in the natural soil layer, and the second one-way water-permeable membrane is arranged in the natural soil layer.

[0031] Specifically, the sunken green area 7 is located within the scope of the green area 8. The position of the sunken green area 7 is lower than the green area 8 on the surrounding ground. The sunken green area 7 uses open space to receive and store rainwater, which can reduce runoff discharge. The first infiltration and drainage pipe 1, the second infiltration and drainage pipe 2 and the overflow well 3 can all be installed inside the sunken green area 7. Inside the sunken green area 7, there are plant layers, planting medium layers, non-degradable permeable geotextile layers, gravel sand filling layers and natural soil layers arranged from top to bottom. The plant layer can refer to a layered structure planted with plants, and rainwater will flow directly into the plant layer. The planting medium layer can refer to a layered structure for providing planting for plants, and plants are planted on the planting medium layer. The non-degradable permeable geotextile layer can refer to a non-degradable permeable geotextile laid below the planting medium layer. The non-degradable permeable geotextile is not easily corroded and has the function of preliminarily filtering rainwater to allow rainwater to pass through. The gravel-filled sand layer may refer to gravel mixed with sand and gravel laid under the non-degradable permeable geotextile. The natural soil layer may refer to the soil formed under the combined action of natural soil-forming factors and not cultivated and utilized by humans. The first infiltration and drainage pipe 1 and the second infiltration and drainage pipe 2 may be laid in the natural soil layer. On rainy days, after being filtered through the plant layer, the planting medium layer, the non-degradable permeable geotextile layer and the gravel-filled sand layer, the rainwater will flow into the first one-way permeable membrane 4 wrapped on the first infiltration and drainage pipe 1 and the second one-way permeable membrane wrapped on the second infiltration and drainage pipe 2 located in the natural soil layer. In this way, rainwater in the sunken green area 7 can flow to the first infiltration and drainage pipe 1 and the second infiltration and drainage pipe 2. The first infiltration and drainage pipe 1 has a space for accommodating rainwater. A plurality of first infiltration and drainage hole groups 11 are provided on the pipe wall of the first infiltration and drainage pipe 1. The first infiltration and drainage pipe 1 is wrapped with a first one-way permeable membrane 4 on the outside, and the plurality of groups are covered by the first one-way permeable membrane 4. The first one-way permeable membrane 4 can be a one-way permeable geotextile membrane. The first one-way permeable membrane 4 only allows rainwater to flow from one side, that is, rainwater can only flow from one side of the membrane to the other side (that is, the permeable direction), while rainwater on the other side of the membrane will be blocked by the first one-way permeable membrane 4 so that the rainwater will not flow out. The permeable direction of the first one-way permeable membrane 4 toward the plurality of first infiltration and drainage hole groups 11 means that rainwater in the natural soil layer will infiltrate into the plurality of first infiltration and drainage hole groups 11 from the first one-way permeable membrane 4, and the rainwater will flow into the interior of the first infiltration and drainage pipe 1 after passing through the plurality of first through holes 111 in the first infiltration and drainage hole groups 11.A plurality of first seepage hole groups 11 are distributed along the length direction of the first seepage and drainage pipe 1, and each group of first seepage hole groups 11 are distributed parallel to each other on the pipe wall of the first seepage and drainage pipe 1, and the spacing between each two adjacent groups of first seepage hole groups 11 can be 50 mm. The first seepage hole group 11 can include a plurality of first through holes 111, and the plurality of first through holes 111 are distributed at equal intervals. The first through holes 111 can be circular, and the diameter of the first through holes 111 can be 20 mm. The angle between each two adjacent first through holes 111 and the center of the first seepage and drainage pipe 1 can be 30°, that is, the angle between the two first through holes 111 and the center of the first seepage and drainage pipe 1 is 30°, so that rainwater can quickly flow from the natural soil layer through the first one-way permeable membrane 4 and the first through holes 111 in sequence into the interior of the first seepage and drainage pipe 1. Since the outside of the first seepage and drainage pipe 1 is wrapped with the first one-way water-permeable membrane 4, the rainwater at the bottom of the first seepage and drainage pipe 1 will not flow out of the first seepage and drainage pipe 1. The rainwater flowing into the first seepage and drainage pipe 1 will flow into the overflow well 3 along the length direction of the first seepage and drainage pipe 1, and the rainwater flowing into the overflow well 3 will flow into the inside of the second seepage and drainage pipe 2.

[0032] For the second one-way water permeable membrane wrapped in the second seepage and drainage pipe 2:

[0033] The second infiltration and drainage pipe 2 is provided with a plurality of second water infiltration hole groups, and the water permeability direction of the second one-way water permeable membrane is toward the plurality of second water infiltration hole groups. The second one-way water permeable membrane is a one-way water permeable geotextile membrane. The spacing between each two adjacent groups of the second water infiltration hole groups is equal; the second water infiltration hole group includes a plurality of second through holes, and the spacing between each two adjacent second through holes is equal. A rainwater infiltration and drainage system provided by an embodiment of the present invention also includes: a rainwater inspection well 5 and a municipal rainwater pipe 6, and the rainwater inspection well 5 and the other end of the second infiltration and drainage pipe 2 are interconnected. The municipal rainwater pipe 6 and the rainwater inspection well 5 are interconnected.

[0034] Specifically, since the second infiltration and drainage pipe 2 has the same structure and principle as the first infiltration and drainage pipe 1, they will not be described here again. Since the second infiltration and drainage pipe 2 has the same structure and principle as the first infiltration and drainage pipe 1, they will not be described here again. Since the second one-way water-permeable membrane has the same structure and principle as the first one-way water-permeable membrane 4, they will not be described here again. After the rainwater in the above-mentioned overflow well 3 flows into the interior of the second infiltration and drainage pipe 2, the second infiltration and drainage pipe 2 can transport the rainwater to the rainwater inspection well 5, and the rainwater transported to the rainwater inspection well 5 will enter the municipal rainwater pipe 6 for discharge and utilization. At the same time, the rainwater in the sunken green area 7 of the second infiltration and drainage pipe 2 can flow through the second one-way water-permeable membrane and the second through hole into the interior of the second infiltration and drainage pipe 2. The rainwater entering the interior of the second infiltration and drainage pipe 2 through the second through hole and the rainwater flowing in from the overflow well 3 merge and then flow from the second infiltration and drainage pipe 2 into the rainwater inspection well 5. When laying the first seepage drainage pipe 1 and the second seepage drainage pipe 2, the first seepage drainage pipe 1 can also be laid at an angle, and the end of the first seepage drainage pipe 1 close to the overflow well 3 is lower than the end away from the overflow well 3, so that the rainwater in the first seepage drainage pipe 1 can quickly flow into the overflow well 3. The second seepage drainage pipe 2 can also be laid at an angle, and the end of the second seepage drainage pipe 2 close to the rainwater inspection well 5 is lower than the end away from the rainwater inspection well 5, so that the rainwater in the second seepage drainage pipe 2 can quickly flow into the rainwater inspection well 5. In addition, the overall height of the second seepage drainage pipe 2 can be lower than the overall height of the first seepage drainage pipe 1. When the amount of rainwater is large, the rainwater can also quickly flow from the first seepage drainage pipe 1, the overflow well 3 and the second seepage drainage pipe 2 into the rainwater inspection well 5. After the rainwater is transported to the rainwater inspection well 5 through the second seepage drainage pipe 2, the rainwater in the rainwater inspection well 5 can flow into the municipal rainwater pipe 6 for discharge and utilization. Then, by laying the first infiltration and drainage pipe 1 and the first one-way water-permeable membrane 4, the second infiltration and drainage pipe 2 and the second one-way water-permeable membrane in the sunken green area 7, when it rains, the rainwater in the sunken green area 7 can penetrate into the first infiltration and drainage pipe 1 through the first one-way water-permeable membrane 4, and penetrate into the second infiltration and drainage pipe 2 through the second one-way water-permeable membrane, and the rainwater will be discharged into the municipal rainwater pipe 6 from the first infiltration and drainage pipe 1 and the second infiltration and drainage pipe 2 more quickly.

[0035] The present invention provides a rainwater infiltration and drainage system, which is used for infiltration and drainage of rainwater in a sunken green area 7. The system is arranged in the sunken green area 7 through a first infiltration and drainage pipe 1, a second infiltration and drainage pipe 2 and an overflow well 3. The first infiltration and drainage pipe 1 and the overflow well 3 are interconnected, and one end of the overflow well 3 and the second infiltration and drainage pipe 2 are interconnected. A first one-way water-permeable membrane 4 is wrapped on the first infiltration and drainage pipe 1, and a plurality of first infiltration and drainage hole groups 11 are provided on the first infiltration and drainage pipe 1. The water permeability direction of the first one-way water-permeable membrane 4 is toward the plurality of first infiltration and drainage hole groups 11. A second one-way water-permeable membrane is wrapped on the second infiltration and drainage pipe 2, and a plurality of second infiltration and drainage hole groups are provided on the second infiltration and drainage pipe 2. The water permeability direction of the second one-way water-permeable membrane is toward the plurality of second infiltration and drainage hole groups. In this way, on rainy days, rainwater in the sunken green area 7 will enter the first plurality of infiltration holes 11 from the first one-way permeable membrane 4, and then enter the first infiltration and drainage pipe 1 from the first plurality of infiltration holes 11. The rainwater entering the first infiltration and drainage pipe 1 will flow into the overflow well 3, and the rainwater flowing into the overflow well 3 will flow into the second infiltration and drainage pipe 2. At the same time, rainwater in the sunken green area 7 will enter the second plurality of infiltration holes from the second one-way permeable membrane, and then enter the second infiltration and drainage pipe 2 from the second plurality of infiltration holes. The rainwater entering the second infiltration and drainage pipe 2 through the second plurality of infiltration holes will merge with the rainwater flowing into the second infiltration and drainage pipe 2 from the overflow well 3, and the merged rainwater will be discharged from the second infiltration and drainage pipe 2. Then, the rainwater in the sunken green area 7 will infiltrate the first infiltration and drainage pipe 1 and the second infiltration and drainage pipe 2, and the first infiltration and drainage pipe 1 and the second infiltration and drainage pipe 2 will discharge the rainwater in the sunken green area 7. Then, it is realized that only the first seepage drainage pipe 1 and the second seepage drainage pipe 2 need to be laid for the pipes, which can reduce the laying amount of pipes, facilitate faster completion of pipe laying in the sunken green area 7, and improve laying efficiency. Thus, the technical effect of saving the laying amount of pipes and improving laying efficiency is achieved.

[0036] In order to explain in detail a rainwater infiltration and drainage method provided by the present invention, the above-mentioned embodiment 1 explains in detail a rainwater infiltration and drainage system. Based on the same inventive concept, the present application also provides a rainwater infiltration and drainage method, see embodiment 2 for details.

[0037] Embodiment 2

[0038] See also Figure 4 , Figure 4It is a flow chart of a rainwater infiltration and drainage method provided by an embodiment of the present invention. Embodiment 2 of the present invention provides a rainwater infiltration and drainage method, which is applied to the rainwater infiltration and drainage system, including rainwater from the sunken green area 7 passing through the first one-way permeable membrane 4 through multiple groups of first infiltration holes 11 into the first infiltration and drainage pipe 1; rainwater is transported to the overflow well 3 through the first infiltration and drainage pipe 1; rainwater in the overflow well 3 enters the second infiltration and drainage pipe 2 and rainwater from the sunken green area 7 passes through the second one-way permeable membrane through multiple groups of second infiltration holes into the second infiltration and drainage pipe 2. Rainwater is transported to the rainwater inspection well 5 through the second infiltration and drainage pipe 2. The rainwater transported to the rainwater inspection well 5 flows into the municipal rainwater pipe 6.

[0039] The present invention provides a rainwater infiltration and drainage method, wherein rainwater in a sunken green area 7 passes through a first one-way water-permeable membrane 4, through multiple groups of first water infiltration holes 11, and enters a first infiltration and drainage pipe 1; the rainwater is transported to an overflow well 3 through the first infiltration and drainage pipe 1; the rainwater in the overflow well 3 enters a second infiltration and drainage pipe 2, and the rainwater in the sunken green area 7 passes through a second one-way water-permeable membrane, through multiple groups of second water infiltration holes, and enters a second infiltration and drainage pipe 2. In this way, on rainy days, rainwater in the sunken green area 7 will enter the first plurality of infiltration holes 11 from the first one-way permeable membrane 4, and then enter the first infiltration and drainage pipe 1 from the first plurality of infiltration holes 11. The rainwater entering the first infiltration and drainage pipe 1 will flow into the overflow well 3, and the rainwater flowing into the overflow well 3 will flow into the second infiltration and drainage pipe 2. At the same time, rainwater in the sunken green area 7 will enter the second plurality of infiltration holes from the second one-way permeable membrane, and then enter the second infiltration and drainage pipe 2 from the second plurality of infiltration holes. The rainwater entering the second infiltration and drainage pipe 2 through the second plurality of infiltration holes will merge with the rainwater flowing into the second infiltration and drainage pipe 2 from the overflow well 3, and the merged rainwater will be discharged from the second infiltration and drainage pipe 2. Then, the rainwater in the sunken green area 7 will infiltrate the first infiltration and drainage pipe 1 and the second infiltration and drainage pipe 2, and the first infiltration and drainage pipe 1 and the second infiltration and drainage pipe 2 will discharge the rainwater in the sunken green area 7. Then, it is realized that only the first seepage drainage pipe 1 and the second seepage drainage pipe 2 need to be laid for the pipes, which can reduce the laying amount of pipes and improve the laying efficiency, thereby achieving the technical effect of saving the laying amount of pipes and improving the laying efficiency.

[0040] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A rainwater infiltration and drainage system for rainwater in a sunken green area, characterized in that: The system comprises: A first seepage and drainage pipe, a second seepage and drainage pipe, and an overflow well are arranged in the sunken green space area, the first seepage and drainage pipe are connected to the overflow well, and the overflow well is connected to one end of the second seepage and drainage pipe; A first one-way water-permeable membrane wrapped around the first seepage and drainage pipe, wherein the first seepage and drainage pipe is provided with a plurality of first water seepage hole groups, and the water permeation direction of the first one-way water-permeable membrane is toward the plurality of first water seepage hole groups; A second one-way water-permeable membrane wrapped around the second seepage and drainage pipe, the second seepage and drainage pipe is provided with a plurality of second water seepage hole groups, and the water permeation direction of the second one-way water-permeable membrane is toward the plurality of second water seepage hole groups; The plurality of first water seepage hole groups are arranged along the circumference of the first seepage and drainage pipe; The system further comprises a rainwater inspection well, wherein the rainwater inspection well is connected to the other end of the second seepage and drainage pipe; The end of the first seepage and drainage pipe close to the overflow well is lower than the end far from the overflow well, the end of the second seepage and drainage pipe close to the rainwater inspection well is lower than the end far from the rainwater inspection well, and the overall height of the second seepage and drainage pipe is lower than the overall height of the first seepage and drainage pipe.

2. The rainwater drainage system according to claim 1, characterized in that: The system further comprises: A municipal rainwater pipe is connected to the rainwater inspection well.

3. The rainwater drainage system according to claim 1, characterized in that: The first one-way water-permeable membrane is a one-way water-permeable geotextile membrane, and the second one-way water-permeable membrane is a one-way water-permeable geotextile membrane.

4. The rainwater drainage system according to claim 1, characterized in that: The spacing between each two adjacent groups of the first water seepage holes is equal; The first water seepage hole group includes a plurality of first through holes, and the intervals between any two adjacent first through holes are equal.

5. The rainwater drainage system according to claim 1, characterized in that: The spacing between each two adjacent groups of the second water seepage holes is equal; The second water seepage hole group includes a plurality of second through holes, and the intervals between any two adjacent second through holes are equal.

6. The rainwater drainage system according to claim 1, characterized in that: The system further comprises: Plant layer; A planting medium layer, wherein the planting medium layer is connected to the plant layer; A non-degradable water-permeable geotextile layer, wherein the non-degradable water-permeable geotextile layer is connected to the planting medium layer; A crushed stone sand filling layer, wherein the crushed stone sand filling layer is connected to the non-degradable permeable geotextile layer; A natural soil layer, the natural soil layer is connected to the gravel sand filling layer, the first seepage and drainage pipe is arranged in the natural soil layer, one end of the second seepage and drainage pipe is arranged in the natural soil layer, the first one-way water-permeable membrane is arranged in the natural soil layer, and the second one-way water-permeable membrane is arranged in the natural soil layer.

7. A rainwater drainage method, applied to the rainwater drainage system according to any one of claims 1 to 6, characterized in that: The method comprises: Rainwater in the sunken green area passes through the first one-way permeable membrane and multiple groups of first water seepage holes into the first seepage pipe; The rainwater is transported to the overflow well through the first seepage and drainage pipe; The rainwater in the overflow well enters the second infiltration and drainage pipe, and the rainwater in the sunken green area passes through the second one-way permeable membrane and multiple groups of second infiltration holes to enter the second infiltration and drainage pipe.

8. The rainwater drainage method according to claim 7, characterized in that: The method further comprises: The rainwater is transported to the rainwater inspection well through the second seepage pipe.

9. The rainwater drainage method according to claim 8, characterized in that: The method further comprises: It will be transported to the stormwater inspection well and flow into the municipal stormwater pipe.

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