Fabricated green belt structure and construction method thereof

Abstract

The invention belongs to the technical field of municipal greening engineering, and discloses a fabricated green belt structure and a construction method thereof. An assembly type green belt structure comprises a green belt, a plurality of green planting modules, a water collecting pipe fitting, a drainage ditch and an impermeable layer. The green belt comprises curbs and backfill soil; the greening planting modules are buried in the backfill soil at intervals, each greening planting module comprises a box body and a plurality of planting pipes located in the box body, and gaps of the box bodies are filled with water storage filler; the water collecting pipe is communicated with the box; the drainage ditch is located on one side of the green belt and communicated with the water collecting pipe fitting. The impermeable layer is located under the box body. According to the assembly type green belt structure, the green planting modules are planted in the green belt, and when heavy rainfall is suffered, rainwater can directly and rapidly permeate through the water storage filler of the green planting modules and then is discharged into the drainage ditch through the water collecting pipe fittings; and an impermeable layer is laid below the greening planting module, so that the water body continues to permeate downwards to soak the roadbed.

Description

Technical Field

[0001] The invention belongs to the technical field of municipal greening projects and relates to an assembled green belt structure and a construction method thereof. Background Art

[0002] Green belts have the functions of separating traffic, beautifying cities, eliminating drivers' visual fatigue and protecting the environment. Specifically, firstly, they increase the green coverage rate; secondly, low shrubs and some trees can purify the air through photosynthesis and reduce noise; thirdly, as green belts on urban roads, they separate motor vehicle lanes from non-motor vehicle lanes, non-motor vehicle lanes from sidewalks, and reduce the occurrence of traffic accidents.

[0003] Traditional green belts are usually strip structures composed of soil surrounded by curbstones on both sides. The soil in the green belt usually has certain water permeability and water storage functions, but it cannot quickly guide and discharge heavy rainfall and rainstorms. Once encountering heavy rainfall or rainstorms, traditional green belts are prone to waterlogging, affecting the survival of vegetation in the green belts, and the infiltration of accumulated water may soak the roadbed, which is also very harmful to the service life of the road. Summary of the invention

[0004] The present application provides an assembled green belt structure for solving the problem that, when encountering heavy rainfall, traditional green belts are very prone to waterlogging, and the accumulated water seeps down and may soak the roadbed.

[0005] On the one hand, the present application provides a prefabricated green belt structure, including:

[0006] A green belt, the green belt comprising curbstones on both sides and backfill soil in the middle;

[0007] A plurality of greening planting modules, wherein the plurality of greening planting modules are buried in the backfill soil at intervals, the greening planting modules include a box body and a plurality of planting tubes located in the box body, and the gaps in the box body are filled with water-storing fillers;

[0008] A water collecting pipe, which is buried in the backfill soil and connected to the box;

[0009] A drainage ditch, the drainage ditch is located at one side of the green belt, and the drainage ditch is connected to the water collecting pipe;

[0010] An anti-seepage layer is located directly below the box body.

[0011] The above-mentioned prefabricated green belt structure, by implanting green planting modules in the green belt, when it encounters heavy rainfall, rainwater can directly penetrate quickly through the water storage fillers of the green planting modules, and then be discharged into the drainage ditch through the water collecting pipes. At the same time, the water storage fillers can accumulate part of the rainwater and retain it to supply vegetation during drought; and by laying an anti-seepage layer under the green planting modules, the accumulated water is prevented from continuing to penetrate downward and soaking the roadbed.

[0012] In the technical solution of one embodiment, the green belt as a whole is provided with a certain slope toward the drainage ditch side.

[0013] In the technical solution of one embodiment, the green belt also includes a backrest, and the backrest is close to the curb.

[0014] In the technical solution of one embodiment, the box body includes a top plate, a bottom plate, a first side plate and a second side plate, and the top plate, the bottom plate, the first side plate and the second side plate together constitute the box body with front and rear openings, and the top plate, the bottom plate, the first side plate and the second side plate are connected by a snap-fitting manner.

[0015] In the technical solution of one embodiment, a plurality of planting holes are opened on the top plate, and the upper end opening of the planting tube is directly connected to the planting holes.

[0016] In the technical solution of one embodiment, the bottom of the planting tube has a buckle, the bottom plate has a corresponding bayonet, and the buckle is engaged with the bayonet.

[0017] In the technical solution of one embodiment, a plurality of water holes are evenly opened on the wall of the planting tube.

[0018] In the technical solution of one embodiment, a plurality of water permeable holes are opened on the top plate.

[0019] In a technical solution of one embodiment, a water filter hole is provided on the second side plate, and the second side plate is connected with the water collecting pipe member through the water filter hole.

[0020] In the technical solution of one embodiment, the planting tube is filled with medium-coarse sand, a mixture of planting soil and medium-coarse sand, and planting soil in sequence from bottom to top.

[0021] In the technical solution of one embodiment, the ratio of the medium-coarse sand, planting soil, the mixture of medium-coarse sand and planting soil is 2:2:3.

[0022] In the technical solution of one embodiment, the ratio of planting soil to medium-coarse sand in the mixture of planting soil and medium-coarse sand is 3:7 to 4:6.

[0023] In the technical solution of one embodiment, the water-storage filler includes water-storage expanded clay in the lower layer and medium-coarse sand in the upper layer.

[0024] In the technical solution of one embodiment, the water collecting pipe comprises a first water collecting square tube and a first water collecting square tube, the first water collecting square tube and the second water collecting square tube are connected end to end, the second water collecting square tube is arranged close to the second side plate, and the second water collecting square tube opens directly opposite the water filter hole.

[0025] In the technical solution of one embodiment, the drainage ditch includes a rainwater outlet and an overflow pipe, and two ends of the overflow pipe are respectively connected to the upper end of the second water collecting square pipe and the rainwater outlet.

[0026] In the technical solution of one embodiment, the anti-seepage layer includes an anti-seepage geotextile.

[0027] In the technical solution of one embodiment, the anti-seepage layer also includes a medium-coarse sand cushion layer spread on the anti-seepage geotextile.

[0028] On the other hand, the present application provides a method for constructing an assembled green belt structure, comprising the following steps:

[0029] S100, pre-buried overflow pipe

[0030] Pre-buried overflow pipe, insert the overflow pipe into the rainwater outlet of the drainage ditch at an angle downward, adjust the overflow pipe angle and elevation, and seal the upper pipe opening of the overflow pipe with geotextile;

[0031] S200, anti-seepage geotextile laying

[0032] Laying of anti-seepage geotextile;

[0033] S300, Construction Green Belt

[0034] After the construction of the curbstones and backrests on both sides of the green belt is completed, the backfill soil elevation is controlled by measuring and placing points, the backfill soil is leveled and compacted, and a certain slope is set for the backfill soil toward the drainage ditch side;

[0035] S400, laying medium-coarse sand cushion

[0036] After the anti-seepage geotextile is laid, a 5cm-10cm medium-coarse sand cushion layer is spread on the anti-seepage geotextile;

[0037] S500, assembling greening planting modules

[0038] The bottom plate is placed in the center of the green belt, and then the planting tube, the first side plate, the second side plate, the first water collection square tube, the second water collection square tube, and the top plate are installed and fixed; then medium-coarse sand, planting soil and a mixture of medium-coarse sand, and planting soil are filled into the planting tube in sequence, and the water-storing ceramsite and a mixture of medium-coarse sand are filled outside the planting tube;

[0039] S600, overflow pipe connection

[0040] Clean the upper pipe opening of the pre-buried overflow pipe, and make a hole above the second water collecting square pipe to connect the overflow pipe with the second water collecting square pipe;

[0041] S700, backfilling of soil on both sides of greening planting module

[0042] After the greening planting module is assembled, backfill soil is placed on both sides.

[0043] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The drawings in this application are used to illustrate preferred embodiments, so as to facilitate a person skilled in the art to clearly understand various other advantages and benefits, and should not be considered as limiting this application. In addition, the same reference numerals are used to represent the same components in all the drawings.

[0045] Figure 1 It is a plan view of the assembled green belt structure in one embodiment of the present application.

[0046] Figure 2 for Figure 1 Transverse AA section view of the medium prefabricated green belt structure.

[0047] Figure 3 for Figure 1 Transverse BB section view of the medium prefabricated green belt structure.

[0048] Figure 4 It is a three-dimensional schematic diagram of a greening planting module in one embodiment of the present application.

[0049] Figure 5 It is a three-dimensional schematic diagram of a planting tube in one embodiment of the present application.

[0050] Figure 6 It is a schematic plan view of a base plate in one embodiment of the present application.

[0051] Description of Figure Numbers:

[0052] 100, green belt; 110, curbstone; 120, backrest; 130, backfill soil;

[0053] 200, greening planting module; 210, top plate; 211, planting hole; 212, water permeable hole; 220, bottom plate; 221, bayonet; 230, first side plate; 240, second side plate; 241, water filter hole; 250, planting tube; 251, water hole; 252, buckle; 260, water storage filler;

[0054] 300, water collecting pipe fittings; 310, first water collecting square pipe; 320, second water collecting square pipe;

[0055] 400, drainage ditch; 410, rainwater inlet; 420, overflow pipe;

[0056] 500. Anti-seepage layer; 510. Anti-seepage geotextile. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0058] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0059] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), unless otherwise clearly and specifically defined.

[0060] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0061] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0062] See also Figures 1 to 6 In one aspect, the present application provides an assembled green belt structure, which mainly includes a green belt 100, a plurality of green planting modules 200, a water collecting pipe 300, a drainage ditch 400 and an impermeable layer 500. The green belt 100 includes curbstones 110 on both sides and backfill 130 in the middle; a plurality of green planting modules 200 are buried in the backfill 130 at intervals, and the green planting module 200 includes a box body and a plurality of planting tubes 250 in the box body, and the gap in the box body is filled with water storage fillers 260 to form a water storage and drainage area; the water collecting pipe 300 is buried in the backfill 130, and the water collecting pipe 300 is connected to the box body; the drainage ditch 400 is located on one side of the green belt 100, and the drainage ditch 400 is connected to the water collecting pipe 300; the impermeable layer 500 is located directly below the box body. When there is heavy rainfall, rainwater can directly penetrate quickly through the water storage filler 260 of the greening planting module 200, and then be discharged into the drainage ditch 400 through the water collecting pipe 300; at the same time, the water storage filler 260 can accumulate part of the rainwater and retain it for supplying vegetation during drought; by laying an impermeable layer 500 under the greening planting module 200, the accumulated water is prevented from continuing to penetrate downward and soaking the roadbed. The assembled green belt structure is efficient, low-cost, and highly applicable. It effectively forms a rainwater infiltration and purification channel in the green belt, which can prevent waterlogging in the green belt and rainwater from infiltrating into the roadbed, affecting the quality of the roadbed. It also has a certain water storage capacity, which can provide moisture for vegetation and reuse rainwater. Reduce the frequency of artificial irrigation of vegetation and reduce the cost of later maintenance.

[0063] It should be noted that the green belt 100 further includes a backrest 120 , and the backrest 120 is close to the curb 110 . The green belt 100 adopts a traditional green belt structure, so it is not described in detail.

[0064] Furthermore, the green belt 100 as a whole is provided with a certain slope (about 1.5 degrees) toward the drainage ditch 400 to facilitate the subsequent rainwater discharge.

[0065] In some embodiments, the box body includes a top plate 210, a bottom plate 220, a first side plate 230, and a second side plate 240. The top plate 210, the bottom plate 220, the first side plate 230, and the second side plate 240 together constitute a box body with front and rear openings. The top plate 210, the bottom plate 220, the first side plate 230, and the second side plate 240 are all connected by a snap-fit ​​method. The top plate 210, the bottom plate 220, the first side plate 230, and the second side plate 240 are made of PE material and assembled by snap-fitting, which is light in texture, low in cost, and simple in construction.

[0066] In some embodiments, a plurality of planting holes 211 are formed on the top plate 210 , and the upper end opening of the planting tube 250 is directly connected to the planting hole 211 .

[0067] Furthermore, the bottom of the planting tube 250 has a buckle 251, the bottom plate 220 has a corresponding bayonet 221, and the buckle 252 is engaged with the bayonet 221. The buckle 252 and the bayonet 221 are assembled by engaging and cooperating, which is low in cost and simple in construction.

[0068] Furthermore, a plurality of water holes 521 may be evenly provided on the wall of the planting tube 250. When the vegetation in the planting tube 250 lacks water, water can flow from the water storage and drainage area into the planting tube 250 through capillary action to supply the vegetation.

[0069] Furthermore, a plurality of water-permeable holes 212 may be provided on the top plate 210, and rainwater may quickly enter the water storage and drainage area through the water-permeable holes 212, thereby preventing water from accumulating on the surface of the green belt 100 and damaging the vegetation.

[0070] Furthermore, the second side plate 240 has a water filtering hole 241, and the second side plate 240 is connected with the water collecting pipe 300 through the water filtering hole 241. Moreover, the water filtering hole 241 can prevent impurities from entering the water collecting pipe 300.

[0071] Specifically, the planting tube 250 is filled with medium-coarse sand, a mixture of planting soil and medium-coarse sand, and planting soil from bottom to top. The ratio of medium-coarse sand, a mixture of planting soil and medium-coarse sand, and planting soil is 2:2:3. The ratio of planting soil to medium-coarse sand in the mixture of planting soil and medium-coarse sand is 3:7 to 4:6.

[0072] Specifically, the water storage filler 260 includes water storage ceramsite at the lower layer and medium-coarse sand at the upper layer. The water storage ceramsite is graded with different particle sizes (5mm-20mm). The water storage ceramsite is filled first, and then the medium-coarse sand is spread. Water is sprinkled during the spreading process to make it dense. After the filling is completed, the top plate 210 is re-covered.

[0073] During precipitation, rainwater is directly purified by infiltration through the water-storage expanded clay and medium-coarse sand layers. The rainwater can quickly converge in the storage and drainage area and be discharged to the road rainwater system through the overflow pipe 420. The water-storage expanded clay and medium-coarse sand layers accumulate part of the precipitation during the rainwater infiltration process and can release water to the plants in the module through capillary action, thereby improving the utilization rate of rainwater resources.

[0074] In some embodiments, the water collecting pipe 300 includes a first water collecting square tube 310 and a first water collecting square tube 320. The first water collecting square tube 310 and the second water collecting square tube 320 are connected end to end. The second water collecting square tube 320 is arranged close to the second side plate 240. The second water collecting square tube 320 has an opening facing the water filter hole 241 and is connected to the water filter hole 241 through the opening.

[0075] In some embodiments, the drainage ditch 400 includes a rainwater inlet 410 and an overflow pipe 420 , and both ends of the overflow pipe 420 are connected to the upper end of the second water collecting square pipe 320 and the rainwater inlet 410 , respectively.

[0076] It should be noted that the drainage ditch 400 is the drainage ditch on both sides of the road (motor vehicle lane), and the drainage ditch can adopt a conventional drainage ditch structure, so it is not described in detail.

[0077] In some embodiments, the anti-seepage layer 500 includes an anti-seepage geotextile 510 , and the anti-seepage layer 500 further includes a medium-coarse sand cushion layer spread on the anti-seepage geotextile 510 .

[0078] Referring to the assembled green belt structure in the above embodiment, another embodiment of the present application provides an assembled green belt structure construction method, which specifically includes the following steps:

[0079] S100, pre-buried overflow pipe 420: pre-buried overflow pipe, the overflow pipe 420 is inserted downwardly into the rainwater outlet 410 of the drainage ditch 400 at an angle of about 30 degrees, the angle and elevation of the overflow pipe 420 are adjusted, and the upper pipe opening of the overflow pipe 420 is closed by tying geotextile to prevent soil from falling.

[0080] S200, laying of anti-seepage geotextile 510: After the lower surface of the green belt 100 is compacted and leveled and accepted, lay the anti-seepage geotextile 510. Before laying the anti-seepage geotextile 510, clean up the sharp edges and corners of the gravel in the green belt 100. The anti-seepage geotextile 510 needs to be rolled up to above the backrest 120, and the horizontal width of the anti-seepage geotextile 510 should be at least 60cm larger than the horizontal clearance of the green belt 100. The anti-seepage geotextile 510 is laid longitudinally, and the length of the overlap should be no less than 20cm.

[0081] S300, construction of green belt 100: after the construction of curbstones 110 and backrests 120 on both sides of green belt 100 is completed, the elevation of backfill soil 130 is measured and placed, and the backfill soil 130 is leveled and compacted; the next step of construction can be carried out only after the backfill soil 130 is compacted to meet the compaction requirements, and a certain slope (about 1.5 degrees) is set on the side of backfill soil 130 toward drainage ditch 400 (motor vehicle lane) to facilitate the later rainwater discharge.

[0082] S400, laying of medium-coarse sand cushion layer: After the anti-seepage geotextile 510 is laid, spread a 5cm-10cm medium-coarse sand cushion layer on the anti-seepage geotextile. The gravel should be spread evenly and flatly.

[0083] S500, assembling greening planting module 200: press Figure 4 As shown in the three-dimensional schematic diagram of the greening planting module 200, the organization staff assembles the modules one by one and then puts them into the green belt 100. Specifically, the bottom plate 220 is placed in the center of the green belt 100, and the planting tube 250, the first side plate 230, the second side plate 240, the first water collection square tube 310, the second water collection square tube 320, and the top plate 210 are installed and fixed; then the planting tube 250 is filled with medium-coarse sand, planting soil and a mixture of medium-coarse sand, and planting soil in sequence, and the outside of the planting tube 250 is filled with water-storing ceramsite and a mixture of medium-coarse sand, first filled with water-storing ceramsite, and then spread medium-coarse sand, and water is sprinkled during the spreading process to make it dense. After the filling is completed, the permeable top plate 210 is re-covered.

[0084] S600, connection of overflow pipe 420: clean the upper pipe opening of the pre-buried overflow pipe 420, and make a hole above the second water collecting square pipe 320 (make the hole at a height of about 150 mm from the bottom plate 220, with a hole diameter of at least 100 mm) so that the overflow pipe 420 is connected to the second water collecting square pipe 320.

[0085] S700, backfilling soil on both sides of the greening planting module 200: After the greening planting module is assembled, backfill soil 130 is filled on both sides. A gap of 5 cm-10 cm is left between the backfill soil 130 and the greening planting module 200, and medium-coarse sand is used to fill and compact it.

[0086] In summary, the beneficial effects of the present invention mainly include:

[0087] 1. By laying anti-seepage geotextile under the greening planting module, the problem of rainwater infiltration is solved, thus preventing rainwater from soaking the roadbed.

[0088] 2. By designing the water storage and drainage structure and planting structure of the green planting module, the module is assembled from PE material components through a snap-on structure. The planting tube is filled with medium-coarse sand, planting soil, a mixture of medium-coarse sand, and planting soil from bottom to top. The water storage and drainage area is filled with water-storing expanded clay and medium-coarse sand. This solves the problem of difficult green belt assembly and rapid storage and discharge of rainwater in green belts and roads, achieving the goal of fast and convenient module construction, alleviating the pressure of road drainage, and achieving the effect of secondary utilization of rainwater.

[0089] 3. By designing the planting tubes with permeable holes, there is a connection between the inside and outside of the planting tubes. When the vegetation in the tubes lacks water, water can reach the planting tubes from the storage and drainage areas through capillary action to supply the vegetation. In the event of heavy rainfall or rainstorms, the discharge of rainwater reduces the impact of water flow on the soil in the planting tubes and keeps the water content in the tubes stable.

[0090] 4. The present invention has a simple structure, which solves the problem of complex structure and high cost of existing green belts, and achieves the effect of simple, fast and low-cost construction.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An assembled green belt structure, characterized in that: include: A green belt (100), the green belt (100) comprising curbstones (110) located on both sides and backfill soil (130) located in the middle; A plurality of greening planting modules (200), wherein the plurality of greening planting modules (200) are buried in the backfill soil (130) at intervals, the greening planting modules (200) comprising a box body and a plurality of planting tubes (250) located in the box body, and the gaps in the box body are filled with water storage fillers (260); A water collecting pipe (300), wherein the water collecting pipe (300) is buried in the backfill soil (130), and the water collecting pipe (300) is connected to the box; A drainage ditch (400), the drainage ditch (400) is located on one side of the green belt (100), and the drainage ditch (400) is connected to the water collecting pipe (300); An anti-seepage layer (500), wherein the anti-seepage layer (500) is located directly below the box body.

2. The assembled green belt structure according to claim 1, characterized in that: The box body comprises a top plate (210), a bottom plate (220), a first side plate (230) and a second side plate (240); the top plate (210), the bottom plate (220), the first side plate (230) and the second side plate (240) together constitute the box body with front and rear openings; the top plate (210), the bottom plate (220), the first side plate (230) and the second side plate (240) are connected by a snap-fitting manner; a plurality of planting holes (211) are provided on the top plate (210); the upper end opening of the planting tube (250) is directly connected to the planting holes (211); the bottom of the planting tube (250) has a snap-fitting buckle (251); the bottom of the planting tube (250) has a corresponding snap-fitting slot (221); the snap-fitting buckle (252) is snap-fitted with the snap-fitting slot (221).

3. The assembled green belt structure according to claim 2, characterized in that: The top plate (210) is provided with a plurality of water permeable holes (212).

4. The assembled green belt structure according to claim 2, characterized in that: The second side plate (240) is provided with a water filtering hole (241), and the second side plate (240) is connected to the water collecting pipe member (300) through the water filtering hole (241).

5. The assembled green belt structure according to claim 1, characterized in that: The planting tube (250) is filled with medium-coarse sand, a mixture of planting soil and medium-coarse sand, and planting soil in sequence from bottom to top.

6. The assembled green belt structure according to claim 5, characterized in that: The ratio of the medium-coarse sand, the mixture of planting soil and medium-coarse sand, and the planting soil is 2:2:3; the ratio of the planting soil to the medium-coarse sand in the mixture of planting soil and medium-coarse sand is 3:7 to 4:

6.

7. The assembled green belt structure according to claim 1, characterized in that: The water storage filler (260) comprises water storage ceramsite at the lower layer and medium-coarse sand at the upper layer.

8. The assembled green belt structure according to claim 2, characterized in that: The water collecting pipe (300) comprises a first water collecting square pipe (310) and a second water collecting square pipe (320), wherein the first water collecting square pipe (310) and the second water collecting square pipe (320) are connected end to end, and the second water collecting square pipe (320) is arranged close to the second side plate (240), and the second water collecting square pipe (320) opens directly opposite to the water filter hole (241); the drainage ditch (400) comprises a rainwater outlet (410) and an overflow pipe (420), and the two ends of the overflow pipe (420) are respectively connected to the upper end of the second water collecting square pipe (320) and the rainwater outlet (410).

9. The assembled green belt structure according to claim 1, characterized in that: The anti-seepage layer (500) comprises an anti-seepage geotextile (510); the anti-seepage layer (500) further comprises a medium-coarse sand cushion layer spread on the anti-seepage geotextile (510).

10. A method for constructing an assembled green belt structure, characterized in that: The following steps are involved: S100, pre-buried overflow pipe (420) The overflow pipe (420) is pre-buried and inserted into the rainwater outlet (410) of the drainage ditch (400) at an angle downward, and the angle and elevation of the overflow pipe (420) are adjusted. The upper pipe opening of the overflow pipe (420) is sealed by tying geotextile; S200, anti-seepage geotextile (510) laying Laying an anti-seepage geotextile (510); S300, Construction Green Belt (100) After the construction of the curbstones (110) and backrests (120) on both sides of the green belt (100) is completed, the elevation of the backfill soil (130) is controlled by measuring and placing points, the backfill soil (130) is leveled and compacted, and a certain slope is set on the side of the backfill soil (130) toward the drainage ditch (400); S400, laying medium-coarse sand cushion After the anti-seepage geotextile (510) is laid, a 5cm-10cm medium-coarse sand cushion layer is spread on the anti-seepage geotextile; S500, assembling greening planting modules (200) A bottom plate (220) is placed in the center of the green belt (100), and a planting tube (250), a first side plate (230), a second side plate (240), a first water collection square tube (310), a second water collection square tube (320), and a top plate (210) are installed and fixed; medium-coarse sand, planting soil and a medium-coarse sand mixture, and planting soil are sequentially filled into the planting tube (250), and a water-storing ceramsite and a medium-coarse sand mixture are filled outside the planting tube (250); S600, overflow pipe (420) connection Clean the upper pipe opening of the pre-buried overflow pipe (420), and open a hole above the second water collecting square pipe (320) so that the overflow pipe (420) is connected to the second water collecting square pipe (320); S700, backfilling of soil on both sides of greening planting module (200) After the greening planting module (200) is assembled, backfill soil (130) is filled on both sides.

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