CN117306658A - Rainwater garden suitable for sponge city modularization construction - Google Patents

Abstract

The utility model relates to a technical field in rainwater garden has proposed a rainwater garden suitable for sponge city modularization construction to the not enough problem of traditional rainwater garden drainage ability, including the foundation ditch of excavation in ground, the foundation ditch intussuseption is filled with the soil structure layer, soil structure layer surface planting has green planting layer, the soil structure layer bottom has still buried drainage structure spare, drainage structure spare includes a plurality of parallel arrangement's water permeable pipe, a plurality of holes of permeating water have all been seted up to water permeable pipe top pipe wall, drainage structure spare both ends all are provided with the overflow case, the overflow case all bury in the foundation ditch, water permeable pipe both ends communicate respectively in two sets of the overflow case, overflow case top intercommunication has the overflow pipe, overflow pipe and municipal rainwater pipe network intercommunication, the overflow case still communicates there is the outlet pipe, the suction pump is installed to the outlet pipe. This application has the effect that further promotes rainwater garden drainage ability.

Description

Rainwater garden suitable for sponge city modularization construction

Technical Field

The application relates to the field of rainwater gardens, in particular to a rainwater garden suitable for sponge city modularization construction.

Background

The rainwater garden is an important component part of a sponge city, mainly refers to a shallow concave green land excavated by manpower, and is planted with various green plants and the like on the surface of the sponge city, and is mainly used for converging and absorbing rainwater from the ground surface and enabling the rainwater to infiltrate into the ground to supplement a groundwater source.

With respect to the above-mentioned related art, when in a period of time such as rainy season in which the rainfall is large, the soil structure of the rainwater garden is likely to reach a saturated state after absorbing water, causing slow infiltration of rainwater, causing easy accumulation of rainwater even flowing backward to the ground, so there is room for improvement.

Disclosure of Invention

In order to promote the drainage capacity of rainwater garden, when reducing rainfall great, the rainwater in rainwater garden is deposited easily and is even backward flowing to the condition on ground, this application provides a rainwater garden suitable for sponge city modularization construction.

The application provides a rainwater garden suitable for sponge city modularization construction adopts following technical scheme:

the utility model provides a rainwater garden suitable for sponge city modularization construction, includes the foundation ditch that excavates in ground, the foundation ditch intussuseption is filled with soil structure layer, soil structure layer surface planting has green planting layer, soil structure layer bottom has still buried drainage structure spare, drainage structure spare includes a plurality of parallel arrangement's water permeable pipe, a plurality of holes of permeating water have all been seted up to water permeable pipe top pipe wall, drainage structure spare both ends all are provided with the overflow case, the overflow case all bury in the foundation ditch, water permeable pipe both ends communicate respectively in two sets of the overflow case, overflow case top intercommunication has the overflow pipe, overflow pipe and municipal rainwater pipe network intercommunication, the overflow case still communicates there is the outlet pipe, the suction pump is installed to the outlet pipe.

Through adopting above-mentioned technical scheme, during rainy day, the rainwater except oozes to underground through soil structure layer, a plurality of holes that permeates water on the accessible permeable pipe are assembled to the intraductal that permeates water, again through the permeable pipe converging to overflow incasement, when follow-up overflow incasement rainwater water level risees to the overflow pipe, the rainwater can be discharged to municipal rainwater pipe network through the overflow pipe, compare traditional rainwater garden structure, be favorable to further rainwater garden's drainage capacity, simultaneously, the rainwater of converging into the overflow case can be temporarily stored in the overflow case, in order to be used as the watering of follow-up rainwater garden, when the rainwater of follow-up needs use the overflow incasement, the rainwater of accessible suction pump with the overflow incasement is taken out outside the outlet pipe.

Preferably, the top of the overflow box extends to the surface layer of the soil structure layer, the top opening of the overflow box is arranged, and the grid cover is detachably connected to the top opening of the overflow box.

By adopting the technical scheme, in rainy days, rainwater and the like on the surface of the soil structure layer can flow into the overflow box through the opening at the top of the overflow box, so that the drainage capacity of a rainwater garden is further improved, the situation that the rainwater on the surface layer of the soil structure layer is accumulated and even flows backward to the ground when the rainfall is too large is reduced, and the opening is conveniently plugged through the grid cover through the arrangement of the grid cover, so that the situation that pedestrians step in the overflow groove by mistake is reduced; meanwhile, the large-volume garbage sundries are conveniently limited to fall into the overflow box through the grid cover.

Preferably, a filter plate is also erected at the top of the overflow box; the filter plate is positioned above the overflow pipe, and the filter plate is obliquely downwards arranged.

By adopting the technical scheme, through the arrangement of the filter plate, the filter plate is used for further filtering the rainwater flowing in from the opening at the top of the overflow box so as to limit the situation that the water outlet pipe and the overflow pipe are blocked due to the fact that the leaves, the rocks and other impurities with smaller volumes fall into the overflow box; through filter plate slope downward setting, the debris of filtering via the filter plate can flow to the slope lower extreme of filter plate through the washing of follow-up rainwater, is favorable to deferring the filter plate to be piled up by rubbish debris and leads to the filtration hole to be blockked up, influences the condition that the rainwater passed through.

Preferably, a connecting rod is arranged between the grille cover and the filter plate, and two ends of the connecting rod are respectively connected with the grille cover and the filter plate.

Through adopting above-mentioned technical scheme, realize on the one hand that firmly erect the filter plate in the overflow box, when later removing the grid cover from overflow box opening part simultaneously, grid cover accessible connecting rod brings the filter plate outside the overflow box, the clearance of filtering debris on the filter plate of being convenient for.

Preferably, sealing blocks are coaxially inserted at two ends of the permeable pipe, a connecting rope is arranged between the two sealing blocks, two ends of the connecting rope are respectively connected with two groups of opposite sides of the sealing blocks, and the length of the connecting rope is longer than that of the permeable pipe.

By adopting the technical scheme, when the rainfall is smaller in a period of time such as a non-rainy season, two groups of sealing blocks are respectively inserted into the two ends of the permeable pipe, so that the plugging of the pipe openings at the two ends of the permeable pipe is realized, the condition that daily irrigation water flows into the overflow box through the permeable pipe is reduced, and the stay time of the irrigation water in the soil structural layer is prolonged; and when in rainy season, the sealing blocks at the two ends of the permeable pipe are moved out to realize that the two ends of the permeable pipe are respectively communicated with the two groups of overflow boxes, so that rainwater of the soil structural layer can flow into the overflow boxes through the permeable pipe. Through the setting of connecting the rope, be convenient for carry out spacingly to the sealing block of permeable tube both ends through connecting the rope to follow-up with sealing block follow the pipe tip department of permeating water after shifting out, sealing block can hang in the overflow box.

Preferably, one side of the sealing block, which is away from the connecting rope, is connected with a limiting rope, one end of the limiting rope, which is away from the sealing block, is connected to the inner wall of the overflow box, and the length of the limiting rope is longer than that of the water permeable pipe.

By adopting the technical scheme, two groups of sealing blocks are moved out from the pipe orifice at one end of the permeable pipe, and sludge impurities and the like accumulated in the permeable pipe can be brought out through the sealing blocks, so that dredging of the permeable pipe is realized; through spacing rope setting, through removing the back with two sets of sealing blocks from the pipe one end that permeates water, insert the pipe mouth department that permeates water with a set of sealing blocks that is closest to the pipe this moment to pulling the spacing rope of this set of sealing block, until two sets of sealing blocks are located the pipe both ends that permeates water respectively, can realize the reset of two sets of sealing blocks.

Preferably, a plurality of supporting pipes are buried in the soil structural layer, two ends of each supporting pipe are respectively communicated with two groups of overflow boxes, and a plurality of strip through holes are formed above each supporting pipe in a surrounding manner; and water absorbing sponge strips are respectively arranged in the supporting tubes in a penetrating manner, and two ends of each water absorbing sponge strip respectively extend into the two groups of overflow boxes.

Through adopting above-mentioned technical scheme, during non-rainy season, the sponge strip that absorbs water can absorb the rainwater that the overflow box was collected and release to the soil structure in situ to realize the watering to planting layer plant, be favorable to promoting the utilization ratio to the rainwater that the overflow box was collected.

Preferably, the overflow box is close to the inner wall of one side of the supporting tube and is provided with a limiting ring corresponding to the water absorbing sponge strip, the limiting ring is positioned at the bottom of the overflow box, and the limiting ring is used for penetrating the water absorbing sponge strip.

Through adopting above-mentioned technical scheme, will absorb water the sponge strip be located the one end of overflow incasement and insert to the spacing ring that corresponds to extend to overflow bottom of the case portion with absorbing water the sponge strip, make the sponge strip that absorbs water can absorb the rainwater of overflow bottom of the case portion better.

In summary, the present application includes at least one of the following beneficial technical effects:

1. during rainy days, when rainwater except that the accessible soil structure layer oozes to underground, the hole that permeates water of accessible infiltration pipe top flows into the intraductal that permeates water, and the overflow pipe that again through permeating water pipe and converging to overflow incasement, unnecessary rainwater accessible overflow pipe in the overflow case is discharged to municipal rainwater pipe network, is favorable to promoting the drainage capacity of rainwater garden structure, reduces the condition that ponding even flows backward appears on rainwater garden surface.

2. Through the filter plate slope downwards setting, the rubbish debris of follow-up by the filter plate filtering can flow to the slope lower extreme department of filter plate under the scouring of rainwater, makes the mesh on the filter plate be difficult for being piled up full jam by rubbish debris.

3. The sealing blocks are coaxially inserted into two ends of the permeable pipe, the sealing blocks are connected through the connecting ropes, the length of the connecting ropes is longer than that of the permeable pipe, two groups of sealing blocks are moved out of the pipe orifice of the permeable pipe in rainy season so that rainwater in a subsequent soil structure layer can be led into the overflow box through the permeable pipe, the sealing blocks are respectively inserted into two ends of the permeable pipe in non-rainy season so as to seal the permeable pipe, the stay time of moisture in the soil structure layer is prolonged, the sealing blocks are respectively moved out of the two ends of the permeable pipe through the arrangement of the connecting ropes, the two groups of permeable pipes can be respectively hung in the two groups of overflow boxes so as to facilitate storage of the sealing blocks, and the sealing blocks can be respectively moved out of one end of the permeable pipe through the connecting ropes so as to realize dredging of the inside of the permeable pipe.

Drawings

Fig. 1 is a schematic view of a soil structure layer for illustrating a rain garden according to an embodiment of the present application.

Fig. 2 is a schematic view of an internal structure of the rainwater garden according to the embodiment of the present application.

Fig. 3 is an enlarged schematic view of the portion a in fig. 2.

Fig. 4 is a diagram illustrating the connection of the grating cover to the filter plate according to the embodiment of the present application.

Fig. 5 is an enlarged schematic view of the portion B in fig. 2.

Fig. 6 is an enlarged schematic view of the portion B in fig. 2.

Reference numerals illustrate:

1. a base groove; 2. a soil structural layer; 21. a crushed stone layer; 22. a sand layer; 23. planting a soil layer; 24. a pebble layer; 3. a green planting layer; 4. a water permeable pipe; 41. a water permeable hole; 42. a sealing block; 43. a connecting rope; 44. a limit rope; 45. a fixing ring; 5. an overflow box; 51. a grille cover; 52. a water outlet pipe; 53. a water pump; 54. a filter plate; 55. an annular baffle; 56. a connecting rod; 6. a support tube; 60. a long through hole; 61. a water-absorbing sponge strip; 62. and a limiting ring.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-6.

The embodiment of the application discloses a rainwater garden suitable for sponge city modularization construction, referring to fig. 1 and 2, the rainwater garden comprises a foundation trench 1 arranged on the ground, a soil structure layer 2 is filled in the foundation trench 1, the surface layer of the soil structure layer 2 is lower than the ground, and a green planting layer 3 is planted above the soil structure layer 2; the soil structure layer 2 has still buried drainage structure spare, and drainage structure spare includes the permeable pipe 4 that a plurality of levels set up, and a plurality of holes 41 of permeating water have been seted up along length direction to permeable pipe 4 top, and drainage structure spare both ends still are provided with overflow case 5, and permeable pipe 4 both ends set up with two overflow case 5 intercommunication respectively, and overflow case 5 top intercommunication has the overflow pipe, and overflow pipe is kept away from overflow case 5's one end and municipal rainwater pipe network intercommunication.

When rainwater accessible soil structure layer 2 oozes to the underground, in the water permeable pipe 4 is flowed into to a plurality of holes 41 that permeate water on the accessible water permeable pipe 4, again flow to two sets of overflow boxes 5 via the water permeable pipe 4, when the rainwater water level in overflow box 5 risees to overflow pipe and overflow box 5 intercommunication department, the rainwater accessible overflow pipe in the overflow box 5 is discharged into municipal rainwater pipe network, the drainage capacity in rainwater garden is convenient for further promote, when the reduction rainfall is great, the condition of rainwater deposit on soil structure layer 2 surface.

The soil structure layer 2 sequentially comprises a crushed stone layer 21, a sand layer 22, a planting soil layer 23 and a pebble layer 24 from bottom to top, the plants of the green planting layer 3 are planted in the planting soil layer 23, and the plants of the green planting layer 3 mainly comprise iris, dried dropwort, dwarf reed and the like. A plurality of water permeable pipes 4 are buried at the top of the crushed stone layer 21.

The bottom of the overflow box 5 is also communicated with a water outlet pipe 52, one end of the water outlet pipe 52 far away from the overflow box 5 vertically extends downwards to the ground, and a water suction pump 53 is arranged on the water outlet pipe 52, so that rainwater in the overflow box 5 is conveniently pumped out through the water suction pump 53 to serve as irrigation water for planting layer plants, and the utilization rate of the rainwater is improved.

Referring to fig. 2 and 3, the top of the overflow box 5 extends to the soil planting surface, the top opening of the overflow box 5 is arranged, the top of the overflow box 5 is further provided with a grid cover 51 for blocking the opening, and the grid cover 51 is in a quadrangular frustum shape with an upward tip. The annular stepped groove is formed in the opening of the top of the overflow box 5 in a surrounding mode, the bottom of the grating cover 51 is lapped in the annular stepped groove, and the grating cover 51 is detachably connected to the top of the overflow box 5. Through the arrangement, the grating cover 51 can realize the blocking of the opening of the overflow box 5, so that the subsequent ground pedestrians can be reduced to step into the overflow box 5 by mistake; meanwhile, part of rainwater which is collected into the soil structure layer 2 on the ground can flow into the overflow box 5 through the grid cover 51, so that the drainage speed of the rainwater garden structure can be further improved.

Referring to fig. 3 and 4, a filter plate 54 is further installed in the overflow tank 5, the filter plate 54 is disposed obliquely downward, and an inclined lower end of the filter plate 54 faces an inner wall of the overflow tank 5 on a side away from the water permeable pipe 4. The rainwater flowing in through the grid cover 51 is filtered through the filter plates 54 conveniently to carry garbage sundries, and the garbage sundries are reduced to be accumulated in the overflow box 5; through the filter plate 54 slope downwards setting, the rubbish of being filtered by filter plate 54 can flow to the slope lower extreme of filter plate 54 under the scouring of follow-up rainwater, delays filter plate 54 to lead to the filtration hole to be blockked up because of rubbish is piled up, influences the condition that the rainwater passed through filter plate 54.

A connecting rod 56 is arranged between the filter plate 54 and the grid cover 51, and two ends of the connecting rod 56 are respectively and fixedly connected to one side of the filter plate 54 opposite to the grid cover 51; and simultaneously, the grating cover 51 is removed from the top of the overflow box 5, and simultaneously, the grating cover 51 can bring the filter plates 54 out of the overflow box 5 together through the connecting rods 56, so that the garbage and sundries filtered out of the filter plates 54 can be cleaned conveniently. The filter plate 54 is equipped with annular baffle 55 around the periphery and annular baffle 55 and overflow tank 5 inner periphery laminating set up, and the setting of annular baffle 55 for follow-up when removing filter plate 54 from overflow tank 5, the rubbish of filtering on the filter plate 54 is difficult for taking place the landing.

Referring to fig. 2 and 5, the sealing blocks 42 are coaxially inserted into the two ends of the water permeable pipe 4, so that the sealing blocks 42 at the two ends of the water permeable pipe 4 can be moved out from the two ends of the water permeable pipe 4 in rainy season, and at the moment, the two ends of the water permeable pipe 4 are respectively communicated with the two groups of overflow boxes 5, so that rainwater which seeps into the soil structural layer 2 can flow into the water permeable pipe 4 through the water permeable holes 41 and then flow into the overflow boxes 5 at the two ends through the water permeable pipe 4, thereby being beneficial to improving the drainage speed of the soil structural layer 2 of the rainwater garden; in non-rainy season, two groups of sealing blocks 42 are respectively inserted into the sealing pipes to seal the pipe orifices of the sealing pipes, so that a small amount of rainwater and irrigation water which are rainy day and time in non-rainy season are reduced to flow into the overflow box 5 through the water permeable pipe 4, the water loss of the soil structural layer 2 is too fast, and the situation that plants in the planting layer need frequent watering is caused.

The opposite sides of the two sealing blocks 42 are provided with connecting ropes 43, the connecting ropes 43 are longer than the water permeable tubes 4, two ends of each connecting rope 43 are connected with the opposite sides of the two sealing blocks 42 respectively, after the two groups of sealing blocks 42 are removed from the two ends of the water permeable tubes 4 respectively through the arrangement of the connecting ropes 43, the two groups of sealing blocks 42 can be hung in the two groups of overflow boxes 5 respectively under the action of the connecting ropes 43, so that temporary storage of the sealing blocks 42 is realized, and loss of the sealing blocks 42 is reduced. Simultaneously, still accessible connecting rope 43 removes two sets of sealing blocks 42 from 4 one end of permeable tube, and in the length direction removal in-process of permeable tube 4 is followed to two sets of sealing blocks 42, can take out impurity such as silt that the inner week of permeable tube 4 is piled up together from permeable tube 4, can realize the clearance mediation to permeable tube 4.

Referring to fig. 5 and 6, two sets of sealing blocks 42 are connected with a limiting rope 44 on opposite sides, the top of the inner wall of one side of the overflow port far away from the permeable pipe 4 is connected with a fixing ring 45 corresponding to the limiting rope 44, the fixing ring 45 is located below the filter plate 54, one end of the limiting rope 44 far away from the sealing block 42 is connected to the fixing ring 45, the connection between the limiting rope 44 and the overflow box 5 is achieved, the length of the limiting rope 44 is longer than that of the permeable pipe 4 and the two sets of sealing blocks 42 are enabled to be moved out from one end of the permeable pipe 4, through the arrangement, after the two sets of sealing blocks 42 are subsequently moved out from one end of the permeable pipe 4, the sealing block 42 which is close to the permeable pipe 4 at the moment can be reinserted into the permeable pipe 4, and the sealing block 42 is pulled back to the other end of the permeable pipe 4 through the limiting rope 44 connected with the sealing block 42, so that the resetting of the sealing block 42 is achieved.

The inner wall of one side of the overflow box 5 is also provided with a plurality of U-shaped rods, and the U-shaped rods and the permeable pipes 4 are positioned on the adjacent inner wall of the overflow box 5; both ends of the U-shaped rods are fixed on the inner wall of the overflow box 5, the U-shaped rods are uniformly distributed along the height direction of the overflow box 5, the U-shaped rod at the topmost part is positioned below the filter plate 54, and subsequent operators can pass through the U-shaped rods to come and go between the overflow box 5 and the ground.

Referring to fig. 2 and 6, the soil structure layer 2 is further embedded with a plurality of horizontally arranged support pipes 6, the plurality of support pipes 6 are all located in the planting soil layer 23, a plurality of long through holes 60 are formed around the periphery of the support pipes 6, the length direction of the long through holes 60 is parallel to the length direction of the support pipes 6, two ends of the support pipes 6 are respectively communicated with two groups of overflow boxes 5, water absorbing sponge strips 61 are coaxially inserted into the support pipes 6, and two ends of the water absorbing sponge strips 61 extend into the two groups of overflow boxes 5 respectively. Through the arrangement, the water-absorbing sponge strips 61 can absorb rainwater in the overflow box 5 through the capillary principle and release the rainwater into the planting soil layer 23 through the long strip through holes 60 on the supporting tube 6, so that irrigation of plants planted on the planting soil layer 23 is realized, and the utilization rate of rainwater in the overflow box 5 is improved.

The bottom that overflow box 5 is close to stay tube 6 one side inner wall corresponds the sponge strip 61 fixedly connected with spacing ring 62 that absorbs water, and the sponge strip 61 that absorbs water is located the one end grafting in corresponding spacing ring 62 of overflow box 5, through above setting, is convenient for absorb water sponge strip 61 and extends to overflow box 5 bottom, and then is convenient for absorb water sponge strip 61 and can absorb the rainwater that is located overflow box 5 bottom.

The implementation principle of the embodiment of the application is as follows:

when rainy season, will permeate water tub 4 both ends sealing block 42 and shift out from the tub 4 that permeates water to make the tub 4 both ends that permeates water can communicate with two sets of overflow case 5 respectively, when rainy day etc. ooze to the underground through soil structure layer 2, the accessible is permeated water tub 4 top and is permeated water hole 41 and sink into the tub 4 that permeates water, again flow into overflow case 5 through permeating water tub 4 in, follow-up overflow incasement unnecessary rainwater can be discharged to municipal rainwater pipe network through the overflow pipe, be favorable to promoting the drainage rate in rainwater garden, simultaneously if rainy season rainfall is great, reduce the condition that the rainwater is deposited on the soil structure layer 2 surface in rainwater garden and is even backward flowed to ground.

In non-rainy season, the sealing blocks 42 at the two ends of the permeable pipe 4 are respectively inserted into the pipe openings at the two ends of the permeable pipe 4, so that the blocking of the permeable pipe 4 is realized, the condition that the water for follow-up irrigation flows into the overflow box 5 through the permeable pipe 4 is limited, and the residence time of the water for irrigation and the like in the soil structural layer 2 is prolonged.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. Rainwater garden suitable for sponge city modularization construction, including excavation in basic groove (1) on ground, basic inslot (1) intussuseption is filled with soil structure layer (2), soil structure layer (2) surface planting has green layer (3) of planting, its characterized in that: the soil structure layer (2) bottom has still buried drainage structure, drainage structure includes a plurality of parallel arrangement's water permeable pipe (4), a plurality of holes (41) that permeate water have all been seted up to water permeable pipe (4) top pipe wall, drainage structure both ends all are provided with overflow case (5), overflow case (5) all bury in base tank (1), water permeable pipe (4) both ends communicate respectively in two sets of overflow case (5), overflow case (5) top intercommunication has the overflow pipe, overflow pipe and municipal rainwater pipe network intercommunication, overflow case (5) still communicate there is outlet pipe (52), suction pump (53) are installed to outlet pipe (52).

2. A stormwater garden suitable for modular construction of a sponge city as claimed in claim 1, wherein: the top of the overflow box (5) extends to the surface layer of the soil structure layer (2) and is provided with an opening at the top of the overflow box (5), and a grid cover (51) is detachably connected to the opening at the top of the overflow box (5).

3. A stormwater garden suitable for modular construction of a sponge city as claimed in claim 2, wherein: a filter plate (54) is also erected at the top of the overflow box (5); the filter plate (54) is positioned above the overflow pipe, and the filter plate (54) is arranged obliquely downwards.

4. A stormwater garden suitable for modular construction of a sponge city as claimed in claim 3, wherein: a connecting rod (56) is arranged between the grid cover (51) and the filter plate (54), and two ends of the connecting rod (56) are respectively connected with the grid cover (51) and the filter plate (54).

5. A stormwater garden suitable for modular construction of a sponge city as claimed in any one of claims 1 to 4, wherein: sealing blocks (42) are coaxially inserted into two ends of the permeable pipe (4), connecting ropes (43) are arranged between the two sealing blocks (42), two ends of each connecting rope (43) are connected with two groups of opposite sides of the sealing blocks (42) respectively, and the length of each connecting rope (43) is longer than that of the permeable pipe (4).

6. A stormwater garden suitable for modular construction of a sponge city as claimed in claim 5, wherein: one side of the sealing block (42) deviating from the connecting rope (43) is connected with a limiting rope (44), one end of the limiting rope (44) away from the sealing block (42) is connected to the inner wall of the overflow box (5), and the length of the limiting rope (44) is longer than that of the permeable tube (4).

7. A stormwater garden suitable for modular construction of a sponge city as claimed in any one of claims 1 to 4, wherein: a plurality of support pipes (6) are buried in the soil structure layer (2), two ends of each support pipe (6) are respectively communicated with two groups of overflow boxes (5), and a plurality of strip through holes (60) are formed above each support pipe (6) in a surrounding mode; the water absorbing sponge strips (61) are respectively arranged in the supporting tubes (6) in a penetrating mode, and two ends of each water absorbing sponge strip (61) respectively extend into the two groups of overflow boxes (5).

8. A stormwater garden suitable for modular construction of a sponge city as claimed in claim 7, wherein: the overflow box (5) is close to the inner wall of one side of the supporting tube (6) and corresponds to the water absorption sponge strip (61), a limiting ring (62) is arranged at the bottom of the overflow box (5), and the limiting ring (62) is used for penetrating the water absorption sponge strip (61).