A municipal drainage system

Abstract

The utility model discloses a municipal drainage system, include: carriageway and sidewalk, the carriageway is all provided with sidewalk, be provided with tree pool on the sidewalk, the junction of carriageway and sidewalk is provided with a plurality of environmental protection type stormwater inlet, a plurality of infiltration rainwater well, a plurality of stormwater inlet drain pipe, first horizontal drainage pipe subassembly and second horizontal drainage pipe subassembly, adjacent two infiltration rainwater wells are linked through the drainage pipeline, each environmental protection type stormwater inlet is communicated with each infiltration rainwater well through each stormwater inlet drain pipe, first horizontal drainage pipe subassembly communicates tree pool and each infiltration rainwater well, second horizontal drainage pipe subassembly is located the side that infiltration rainwater well is away from carriageway, and is communicated with each infiltration rainwater well. Environmental protection type stormwater inlet avoids the accumulation of rainwater on the carriageway, and the tree pool in combination with the first horizontal drainage pipe subassembly and the second horizontal drainage pipe subassembly below the tree pool can effectively penetrate and discharge the accumulated water in the soil below the sidewalk to the infiltration rainwater well, realize all -round drainage, and improve the drainage efficiency.

Description

Technical Field

[0001] This utility model relates to the field of municipal facilities technology, and specifically to a municipal drainage system. Background Technology

[0002] Heavy rain often leads to flooding on urban roads, causing inconvenience to residents' travel and daily life, especially making it difficult for pedestrians to walk when sidewalks are flooded. This situation can seriously affect the normal operation of a city. Therefore, a drainage system that can improve the drainage efficiency of urban roads is needed, which is crucial for ensuring the safety of urban traffic and residents' lives. Utility Model Content

[0003] One of the objectives of this invention is to provide a municipal drainage system to solve the problem of insufficient drainage efficiency in existing urban drainage systems.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A municipal drainage system includes: a roadway and a sidewalk, each roadway having a sidewalk; tree pits on the sidewalks; multiple environmentally friendly rainwater inlets at the junction of the roadway and the sidewalks; multiple infiltration rainwater wells, multiple rainwater inlet drain pipes, a first transverse drain pipe assembly, and a second transverse drain pipe assembly; adjacent infiltration rainwater wells are connected by drainage pipes; each environmentally friendly rainwater inlet is connected to each infiltration rainwater well via its respective rainwater inlet drain pipe; the first transverse drain pipe assembly connects the tree pits and each infiltration rainwater well; the second transverse drain pipe assembly is located on the side of the infiltration rainwater wells away from the roadway and is connected to each infiltration rainwater well, for collecting rainwater from the soil and guiding it to the infiltration rainwater wells.

[0006] Based on the aforementioned technical means, the environmentally friendly rainwater inlet can collect rainwater from the roadway, preventing rainwater from accumulating on the roadway. The rainwater is then transported to the infiltration rainwater well through the rainwater inlet drain pipe, effectively removing water accumulation on the roadway. The vegetation and soil in the tree pit can also achieve drainage. Furthermore, combined with the first horizontal drain pipe assembly below the tree pit, excess water in the tree pit can be transported to the infiltration rainwater well, achieving drainage. At the same time, a second horizontal drain pipe assembly is installed on the side of the infiltration rainwater well away from the roadway, which can further infiltrate and discharge water from the soil under the sidewalk into the infiltration rainwater well, improving drainage efficiency.

[0007] Furthermore, the drainage system of this utility model has a simple structure and is easy to construct, requiring no complicated construction steps.

[0008] Furthermore, the first transverse drainage pipe assembly includes a first longitudinal perforated collection pipe and a plurality of first transverse drainage pipes. The first longitudinal perforated collection pipe is buried at the bottom of the tree pit and laid out along the length of the road. Each of the first transverse drainage pipes is connected at both ends to the first longitudinal perforated collection pipe and each of the infiltration rainwater wells, so that rainwater in the tree pit can seep into the first longitudinal perforated collection pipe and flow into each of the infiltration rainwater wells through the first transverse drainage pipes.

[0009] According to the above technical means, the first longitudinal perforated collection pipe can collect rainwater in the tree pit while collecting water in the tree pit, and can also collect rainwater in the direction of road length, so as to achieve multi-directional rainwater collection. Multiple first transverse drainage pipes transport the rainwater in the first longitudinal perforated collection pipe to the infiltration rainwater well, so as to avoid rainwater from accumulating and stagnating in the tree pit and soil.

[0010] Furthermore, the first longitudinal perforated collection pipe is a DN150 perforated collection pipe, and each of the first transverse drainage pipes is a DN150 transverse drainage pipe.

[0011] Based on the above technical means, the DN150 pipe can easily carry the rainwater from multiple tree pits, avoiding overflow or flooding caused by insufficient pipe diameter. Furthermore, the equal-diameter connection between the first longitudinal perforated collection pipe and the first transverse drainage pipe enables rapid drainage, thereby improving drainage efficiency.

[0012] Furthermore, the tree pit is laid with a gravel cushion layer, a permeable geotextile, and planting soil in sequence from bottom to top, and the first longitudinal perforated collection pipe is buried in the gravel cushion layer so that rainwater in the tree pit can permeate into the first longitudinal perforated collection pipe.

[0013] According to the above technical means, the planting soil provides nutrients for the vegetation, the gravel cushion layer at the bottom of the tree pit can ensure the smooth flow of rainwater in the tree pit, so that the rainwater in the tree pit can seep into the first longitudinal perforated collection pipe, and the permeable geotextile can ensure that the rainwater in the tree pit flows smoothly from the planting soil to the gravel cushion layer while ensuring that the planting soil is not lost.

[0014] Furthermore, the first longitudinally perforated collection pipe is also wrapped with a non-woven geotextile, which is secured to the first longitudinally perforated collection pipe with cable ties.

[0015] According to the above technical means, the non-woven geotextile can prevent small particles in the gravel cushion layer from entering the first longitudinal perforated collection pipe, and further prevent the first longitudinal perforated collection pipe from being blocked. The tie can ensure that the non-woven geotextile can be firmly wrapped around the outside of the first longitudinal perforated collection pipe.

[0016] Furthermore, the inner wall of the tree pit is also covered with impermeable geotextile.

[0017] Based on the above technical means, the impermeable geotextile can prevent water in the tree pit from seeping out of the tree pit through the side wall of the tree pit, ensuring that the water in the tree pit only seeps from the bottom of the tree pit, and further ensuring that the rainwater in the tree pit can enter the first longitudinal perforated collection pipe and be discharged to the infiltration rainwater well through the first transverse drainage pipe.

[0018] Furthermore, the second transverse drainage pipe assembly includes a second longitudinal perforated collection pipe and a plurality of second transverse drainage pipes. The second longitudinal perforated collection pipe is located on the side of the infiltration rainwater well away from the tree pit and is laid along the length of the road. Both ends of each second transverse drainage pipe are connected to the second longitudinal perforated collection pipe and each of the infiltration rainwater wells, so that rainwater in the soil under the sidewalk can infiltrate into the second longitudinal perforated collection pipe and flow into each of the infiltration rainwater wells through each of the second transverse drainage pipes.

[0019] Based on the above technical means, the second longitudinal perforated collection pipe can collect rainwater along the length of the road, while multiple second transverse drainage pipes can divert water at multiple points, ensuring that the rainwater in the second longitudinal perforated collection pipe can flow to the infiltration rainwater well.

[0020] Furthermore, each of the second transverse drainage pipes includes a PVC drainage pipe and a reinforced concrete outer sleeve. The two ends of the PVC drainage pipe are respectively connected to the second longitudinal perforated collection pipe and each of the infiltration rainwater wells; the reinforced concrete outer sleeve is fitted over the PVC drainage pipe.

[0021] Based on the above technical means, the inner wall of the PVC drainage pipe is smooth, the water flow resistance is small, which is conducive to the flow and discharge of water; the reinforced concrete outer casing can protect the PVC drainage pipe and prevent it from being crushed.

[0022] Furthermore, the PVC drainage pipe is a DN110 drainage pipe, the reinforced concrete outer casing is a DN200 outer casing, and the second longitudinal perforated collection pipe is a DN110 perforated collection pipe.

[0023] Furthermore, the sidewalk is paved with permeable bricks.

[0024] Based on the aforementioned technical means, permeable bricks help rainwater on the sidewalk to seep downwards into the soil, so that the second horizontal drainage pipe assembly can guide the rainwater in the soil to the infiltration well.

[0025] The beneficial effects of this utility model are as follows:

[0026] Environmentally friendly storm drains collect rainwater from the roadway, preventing it from accumulating. The rainwater is then transported to the infiltration storm drain well via the drain pipe, effectively removing water from the roadway. The vegetation and soil in the tree pits also contribute to drainage. Furthermore, the first horizontal drain pipe assembly below the tree pits transports excess water to the infiltration storm drain well, achieving drainage. Simultaneously, a second horizontal drain pipe assembly is installed on the side of the infiltration storm drain well away from the roadway, further infiltrating and discharging water from the soil beneath the sidewalk into the infiltration storm drain well, improving drainage efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the drainage system of this utility model;

[0029] Figure 2 This is a structural schematic diagram of one side of the sidewalk of this utility model;

[0030] Figure 3 This is a schematic diagram of the tree pool structure of this utility model;

[0031] Figure 4 This is a schematic diagram of the cross-sectional structure of the second transverse drainage pipe of this utility model;

[0032] Figure 5 This is a top view of the sidewalk structure of this utility model;

[0033] Figure 6 This is a schematic diagram of the perforated cross-sectional structure of the first longitudinal perforated collection tube / second longitudinal perforated collection tube of this utility model.

[0034] in,

[0035] 100. Driveway; 110. Driveway storm drain; 200. Sidewalk; 210. Permeable brick; 300. Tree pit; 310. Gravel cushion layer; 320. Permeable geotextile; 330. Planting soil; 340. Impermeable geotextile; 400. Environmentally friendly storm drain; 500. Infiltrative storm drain; 600. Storm drain pipe; 700. First transverse drainage pipe assembly; 710. First longitudinal perforated collection pipe; 720. First transverse drainage pipe; 800. Second transverse drainage pipe assembly; 810. Second longitudinal perforated collection pipe; 820. Second transverse drainage pipe; 821. PVC drainage pipe; 822. Reinforced concrete outer casing; 900. Drainage pipe. Detailed Implementation

[0036] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. The drawings are for illustrative purposes only and should not be construed as limiting the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0037] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0038] This embodiment provides, as follows: Figures 1 to 5 The municipal drainage system shown includes: a carriageway 100 and a sidewalk 200, with a sidewalk 200 provided on each carriageway 100; tree pits 300 provided on the sidewalks 200; multiple environmentally friendly rainwater inlets 400 provided at the junction of the carriageway 100 and the sidewalks 200; multiple infiltration rainwater wells 500, multiple rainwater inlet drain pipes 600, a first transverse drain pipe assembly 700 and a second transverse drain pipe assembly 800; adjacent infiltration rainwater wells 500 are connected by a drain pipe 900; each environmentally friendly rainwater inlet 400 is connected to each infiltration rainwater well 500 through its respective rainwater inlet drain pipe 600; the first transverse drain pipe assembly 700 connects the tree pits 300 and each infiltration rainwater well 500; the second transverse drain pipe assembly 800 is located on the side of the infiltration rainwater well 500 away from the carriageway 100 and is connected to each infiltration rainwater well 500, used to collect rainwater in the soil and guide it to the infiltration rainwater well 500.

[0039] After heavy rain or storms, rainwater from the roadway 100 can enter the environmentally friendly rainwater inlet 400 due to the road slope, and then flow into the infiltration rainwater well 500 through the rainwater inlet drain pipe 600. Rainwater from the sidewalk 200 can flow into the tree pit 300, and the rainwater in the tree pit 300 can then be discharged into the infiltration rainwater well 500 through the first transverse drain pipe assembly 700. At the same time, the second drain pipe assembly in the soil below the sidewalk 200 collects the rainwater from the side of the infiltration rainwater well 500 away from the roadway 100 and discharges the rainwater into the infiltration rainwater well 500. In this way, rainwater on the roadway 100 and the sidewalk 200 can be discharged at the same time, preventing water accumulation on the roadway 100 and the sidewalk 200.

[0040] The environmentally friendly rainwater inlet 400 can collect rainwater from the driveway 100, preventing rainwater from accumulating on the driveway 100. The rainwater is then transported to the infiltration rainwater well 500 through the rainwater inlet drain pipe 600, effectively removing water from the driveway 100. The vegetation and soil in the tree pit 300 can also achieve drainage. In addition, the first horizontal drain pipe assembly 700 below the tree pit 300 can transport excess water in the tree pit 300 to the infiltration rainwater well 500, achieving drainage. At the same time, a second horizontal drain pipe assembly 800 is installed on the side of the infiltration rainwater well 500 away from the driveway 100, which can further infiltrate and discharge water in the soil below the sidewalk 200 to the infiltration rainwater well 500, improving drainage efficiency.

[0041] Furthermore, the drainage system in this embodiment has a simple structure and is easy to construct, requiring no complicated construction steps.

[0042] like Figure 2 As shown, in this embodiment, the first transverse drainage pipe assembly 700 includes a first longitudinal perforated collection pipe 710 and multiple first transverse drainage pipes 720. The first longitudinal perforated collection pipe 710 is buried at the bottom of the tree pit 300 and laid out along the length of the road. The two ends of each first transverse drainage pipe 720 are respectively connected to the first longitudinal perforated collection pipe 710 and each infiltration rainwater well 500, so that rainwater in the tree pit 300 can seep into the first longitudinal perforated collection pipe 710 and flow into each infiltration rainwater well 500 through each first transverse drainage pipe 720. The multiple first transverse drainage pipes 720 are laid out along the length of the first longitudinal perforated collection pipe 710, with a length of 2m, and the distance between two adjacent first transverse drainage pipes 720 is 30m. The first longitudinal perforated collection pipe 710 collects water accumulated in the tree pit 300 and can also collect rainwater along the length of the road, achieving multi-directional rainwater collection. Multiple first transverse drainage pipes 720 transport the rainwater in the first longitudinal perforated collection pipe 710 to the infiltration rainwater well 500, preventing rainwater from accumulating and stagnating in the tree pit 300 and the soil.

[0043] In this embodiment, the first longitudinally perforated collection pipe 710 is a DN150 perforated collection pipe, with perforations at a 45° offset on the pipe wall, such as... Figure 6 As shown, the distance between two adjacent perforated cross sections is 150mm, and each perforated cross section has four 15mm diameter perforated holes. Each first transverse drainage pipe 720 is a DN150 transverse drainage pipe. DN150 pipes can easily handle the rainwater runoff from multiple tree pits 300, avoiding overflow or flooding caused by insufficient pipe diameter. This meets drainage requirements while avoiding material waste due to excessively large pipe diameters. Furthermore, the equal-diameter connection between the first longitudinal perforated collection pipe 710 and the first transverse drainage pipe 720 enables rapid drainage, improving drainage efficiency. To ensure smooth rainwater flow, both the first longitudinal perforated collection pipe 710 and each first transverse drainage pipe 720 are made of UPVC material, which features a smooth inner wall, high strength, and excellent corrosion and chemical resistance. It is stable in natural environments, not easily corroded, and has a long service life.

[0044] like Figure 3 As shown, in this embodiment, a gravel cushion layer 310, a permeable geotextile 320, and planting soil 330 are laid sequentially from bottom to top within the tree pit 300. A first longitudinal perforated collection pipe 710 is buried within the gravel cushion layer 310 to allow rainwater in the tree pit 300 to infiltrate into the first longitudinal perforated collection pipe 710. The planting soil 330 provides nutrients for the vegetation, while the gravel cushion layer 310 at the bottom of the tree pit 300 ensures smooth flow of rainwater within the tree pit 300, allowing rainwater to infiltrate into the first longitudinal perforated collection pipe 710. The permeable geotextile 320 ensures that rainwater in the tree pit 300 flows smoothly from the planting soil 330 to the gravel cushion layer 310 while preventing the planting soil 330 from being washed away.

[0045] To ensure the vitality of the vegetation within the tree pit 300, the planting soil 330 is divided into a planting soil + base fertilizer layer and a planting soil layer. The planting soil + base fertilizer layer is located above the permeable geotextile 320, which can continuously provide nutrients for the vegetation and ensure its growth and water absorption. The planting soil layer is located above the planting soil + base fertilizer layer and is used to position the vegetation. Both the planting soil + base fertilizer layer and the planting soil layer use permeable substrate.

[0046] In this embodiment, the tree pit 300 is a strip-shaped tree pit or a square tree pit.

[0047] In this embodiment, in order to allow rainwater from the sidewalk 200 to flow towards the tree pit 300 or the environmentally friendly rainwater inlet 400, the sidewalk 200 is designed with a 1.0% slope in the transverse direction of the road, and the direction towards the carriageway 100 is downhill. Similarly, in order to allow rainwater from the carriageway 100 to flow towards the environmentally friendly rainwater inlet 400, the carriageway 100 is designed with a 1.5% slope, starting from the centerline of the road and ending at the environmentally friendly rainwater inlet 400, and the direction towards the environmentally friendly rainwater inlet 400 is downhill.

[0048] Of course, in order to disperse and drain rainwater from the roadway 100, a roadway rainwater well 110 is installed under the roadway 100, which can drain rainwater from the roadway 100 together with the environmentally friendly rainwater inlet 400.

[0049] In this embodiment, the first longitudinal perforated collection pipe 710 is also wrapped with a non-woven geotextile, which is secured to the first longitudinal perforated collection pipe 710 with cable ties. The non-woven geotextile prevents small particles from the gravel cushion layer 310 from entering the first longitudinal perforated collection pipe 710, further preventing blockage. The cable ties ensure that the non-woven geotextile is securely wrapped around the outside of the first longitudinal perforated collection pipe 710. The overlap width of the non-woven geotextile is 0.1m, and the overlap is secured with cable ties to prevent the non-woven geotextile from falling off from the overlap, ensuring that it is securely wrapped around the first longitudinal perforated collection pipe 710.

[0050] like Figure 3 As shown, in this embodiment, an impermeable geotextile 340 is also laid on the inner sidewall of the tree pit 300. The impermeable geotextile 340 can prevent water accumulated in the tree pit 300 from seeping out of the tree pit 300 through the sidewall of the tree pit 300, ensuring that water accumulated in the tree pit 300 only seeps from the bottom of the tree pit 300, avoiding water seepage from the tree pit 300, and further ensuring that rainwater in the tree pit 300 can enter the first longitudinal perforated collection pipe 710 and be discharged to the infiltration rainwater well 500 through the first transverse drainage pipe 720.

[0051] like Figure 2As shown, in this embodiment, the second transverse drainage pipe assembly 800 includes a second longitudinal perforated collection pipe 810 and a plurality of second transverse drainage pipes 820. The second longitudinal perforated collection pipe 810 is located on the side of the infiltration rainwater well 500 away from the tree pit 300 and is laid along the length of the road. The two ends of each second transverse drainage pipe 820 are respectively connected to the second longitudinal perforated collection pipe 810 and each infiltration rainwater well 500, so that rainwater in the soil below the sidewalk 200 can infiltrate into the second longitudinal perforated collection pipe 810 and flow into each infiltration rainwater well 500 through each second transverse drainage pipe 820. The plurality of second transverse drainage pipes 820 are laid along the length of the second longitudinal perforated collection pipe 810, with a length of 2m and a spacing of 30m between two adjacent second transverse drainage pipes 820. The second longitudinal perforated collection pipe 810 can collect rainwater along the length of the road, while multiple second transverse drainage pipes 820 can divert water at multiple points, ensuring that the rainwater in the second longitudinal perforated collection pipe 810 can flow to the infiltration rainwater well 500.

[0052] like Figure 4 As shown, in this embodiment, each second transverse drainage pipe 820 includes a PVC drainage pipe 821 and a reinforced concrete outer sleeve 822. Both ends of the PVC drainage pipe 821 are connected to the second longitudinal perforated collection pipe 810 and each infiltration rainwater well 500, respectively. The reinforced concrete outer sleeve 822 is fitted over the PVC drainage pipe 821. Both the PVC drainage pipe 821 and the reinforced concrete outer sleeve 822 are 2m long, and the distance between two adjacent PVC drainage pipes 821 is 30m. The inner wall of the PVC drainage pipe 821 is smooth, resulting in low water flow resistance and facilitating water drainage. The reinforced concrete outer sleeve 822 protects the PVC drainage pipe 821, preventing it from being crushed.

[0053] In this embodiment, the PVC drainage pipe 821 is a DN110 drainage pipe, and the reinforced concrete outer casing 822 is a DN200 outer casing; the second longitudinal perforated collection pipe 810 is a DN110 perforated collection pipe, with perforations at a 45° offset on the same pipe wall, such as... Figure 6 As shown, the cross-sectional distance between two adjacent perforations is 150mm, and each perforation has four perforated holes with a diameter of 10mm.

[0054] like Figure 5 As shown, in this embodiment, permeable bricks 210 are laid on the sidewalk 200. The permeable bricks 210 help rainwater on the sidewalk 200 to infiltrate downwards into the soil so that the second transverse drainage pipe assembly 800 can guide the rainwater in the soil into the infiltration well 500.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A municipal drainage system, characterized in that, include: A driveway (100) and a sidewalk (200) are provided on the driveway (100); tree pits (300) are provided on the sidewalks (200); and multiple environmentally friendly rainwater inlets (400) are provided at the junction of the driveway (100) and the sidewalks (200). The system includes multiple infiltration rainwater wells (500), multiple rainwater inlet drain pipes (600), a first horizontal drain pipe assembly (700), and a second horizontal drain pipe assembly (800); two adjacent infiltration rainwater wells (500) are connected by a drain pipe (900); each of the environmentally friendly rainwater inlets (400) is connected to each of the infiltration rainwater wells (500) through each of the rainwater inlet drain pipes (600); the first horizontal drain pipe assembly (700) connects the tree pit (300) and each of the infiltration rainwater wells (500); the second horizontal drain pipe assembly (800) is located on the side of the infiltration rainwater wells (500) away from the roadway (100) and is connected to each of the infiltration rainwater wells (500) for collecting rainwater in the soil and guiding it to the infiltration rainwater wells (500).

2. A municipal drainage system according to claim 1, characterized in that, The first transverse drainage pipe assembly (700) includes a first longitudinal perforated collection pipe (710) and a plurality of first transverse drainage pipes (720). The first longitudinal perforated collection pipe (710) is buried at the bottom of the tree pit (300) and laid along the length of the road. Each of the first transverse drainage pipes (720) is connected at both ends to the first longitudinal perforated collection pipe (710) and each of the infiltration rainwater wells (500), so that rainwater in the tree pit (300) can seep into the first longitudinal perforated collection pipe (710) and flow into each of the infiltration rainwater wells (500) through the first transverse drainage pipes (720).

3. A municipal drainage system according to claim 2, characterized in that, The first longitudinal perforated collection pipe (710) is a DN150 perforated collection pipe, and each of the first transverse drainage pipes (720) is a DN150 transverse drainage pipe.

4. A municipal drainage system according to claim 2, characterized in that, The tree pit (300) is laid with a gravel cushion layer (310), a permeable geotextile (320) and planting soil (330) from bottom to top. The first longitudinal perforated collection pipe (710) is buried in the gravel cushion layer (310) so that rainwater in the tree pit (300) can permeate into the first longitudinal perforated collection pipe (710).

5. A municipal drainage system according to claim 2, characterized in that, The first longitudinal perforated collection pipe (710) is also covered with a non-woven geotextile, which is secured to the first longitudinal perforated collection pipe (710) with cable ties.

6. A municipal drainage system according to any one of claims 1-5, characterized in that, The inner wall of the tree pit (300) is also covered with impermeable geotextile (340).

7. A municipal drainage system according to claim 1, characterized in that, The second transverse drainage pipe assembly (800) includes a second longitudinal perforated collection pipe (810) and a plurality of second transverse drainage pipes (820). The second longitudinal perforated collection pipe (810) is located on the side of the infiltration rainwater well (500) away from the tree pit (300) and is laid along the length of the road. The two ends of each second transverse drainage pipe (820) are respectively connected to the second longitudinal perforated collection pipe (810) and each of the infiltration rainwater wells (500) so that rainwater in the soil below the sidewalk (200) can infiltrate into the second longitudinal perforated collection pipe (810) and flow into each of the infiltration rainwater wells (500) through each of the second transverse drainage pipes (820).

8. A municipal drainage system according to claim 7, characterized in that, Each of the second transverse drainage pipes (820) includes a PVC drainage pipe (821) and a reinforced concrete outer sleeve (822). The two ends of the PVC drainage pipe (821) are respectively connected to the second longitudinal perforated collection pipe (810) and each of the infiltration rainwater wells (500); the reinforced concrete outer sleeve (822) is fitted over the PVC drainage pipe (821).

9. A municipal drainage system according to claim 8, characterized in that, The PVC drainage pipe (821) is a DN110 drainage pipe, the reinforced concrete outer casing (822) is a DN200 outer casing, and the second longitudinal perforated collection pipe (810) is a DN110 perforated collection pipe.

10. A municipal drainage system according to claim 1, characterized in that, The sidewalk (200) is paved with permeable bricks (210).

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