CN214461066U - Multistage retaining sponge facility - Google Patents

Abstract

The utility model discloses a multistage retaining sponge facility relates to urban rainwater processing technology field, aims at solving can increase the holistic drainage pressure in city behind a large amount of rainwater drainage sewer pipe, if meet the problem that low-lying department formation ponding can cause the flood. Its technical scheme main points are, including highly degressive primary filter tank, second grade filtering ponds, tertiary filter tank and level four filter tank in proper order, the low reaches of level four filter tank are provided with the overflow well, be provided with the drain pipe of connecting the river course on the side of overflow well, be provided with overflow well lid on the top surface of overflow well. Through the multistage retaining of first-level filtering ponds, second grade filtering ponds, tertiary filtering ponds, level four filtering ponds, on the one hand, alleviate flood season drainage pressure, on the other hand, multistage purified rainwater can directly be used for road and afforestation to spray etc. the water economy resource improves water resource utilization ratio.

Description

Multistage retaining sponge facility

Technical Field

The utility model belongs to the technical field of the technique of urban rainwater processing and specifically relates to a multistage retaining sponge facility is related to.

Background

The sponge city is a city which can be like a sponge, has good elasticity in the aspects of adapting to environmental changes, coping with natural disasters and the like, absorbs water, stores water, seeps water and purifies water when raining, and releases and utilizes the stored water when needed. Sponge city construction should follow ecological priority principle etc. combines together natural way and artificial measures, under the prerequisite of guaranteeing urban drainage waterlogging prevention safety, furthest realizes that rainwater stores up, permeates and purifies in the urban area, promotes the utilization of rainwater resource and ecological environment protection. In the sponge city construction process, the systematicness of natural rainfall, surface water and underground water is planned, water recycling links such as water supply and drainage are coordinated, and the complexity and the long-term property of the links are considered.

The existing natural rainfall and surface water are generally discharged into sewer pipes.

The above prior art solutions have the following drawbacks: a large amount of rainwater can increase the whole drainage pressure in city after draining into sewer pipe, if meet the low-lying department and form ponding and can initiate the flood, consequently wait to further improve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a multistage retaining sponge facility, it has multistage retaining and alleviates drainage pressure, improves water resource utilization's effect.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a multistage retaining sponge facility, includes highly degressive one-level filtering ponds, second grade filtering ponds, tertiary filtering ponds and level four filtering ponds in proper order, the low reaches of level four filtering ponds are provided with the overflow well, be provided with the drain pipe of connecting the river course on the side of overflow well, be provided with overflow well lid on the top surface of overflow well.

The utility model discloses further set up to: the primary filter tank comprises a primary plain soil tamping layer, a primary gravel layer, a primary permeable geotextile layer, a primary coarse sand layer, a primary sand layer and a primary green plant water storage layer which are sequentially arranged from bottom to top, wherein the primary gravel layer is internally wrapped with a primary perforated collecting pipe with a L-shaped section, a plurality of primary water seepage holes are uniformly distributed on the circumferential side wall of the water inlet end of the primary perforated collecting pipe, and the water outlet end of the primary perforated collecting pipe is positioned above the secondary filter tank.

The utility model discloses further set up to: the secondary filter tank comprises a secondary plain soil rammed layer, a secondary gravel layer, a secondary permeable geotextile layer, a secondary coarse sand layer, a secondary sandy soil layer and a secondary green plant water storage layer which are sequentially arranged from bottom to top, a secondary perforated collecting pipe with a L-shaped section is wrapped in the secondary gravel layer, a plurality of secondary seepage holes are uniformly distributed on the circumferential side wall of the water inlet end of the secondary perforated collecting pipe, and the water outlet end of the secondary perforated collecting pipe is positioned above the tertiary filter tank.

The utility model discloses further set up to: tertiary filtering ponds include from supreme tertiary plain soil tamp layer, tertiary metalling, the tertiary geotechnological cloth layer of permeating water, tertiary coarse sand layer, tertiary sand soil layer and the green aquifer of planting of tertiary that sets gradually down, the interior package of tertiary rubble layer has the tertiary perforation collecting pipe that the cross-section is the L type, evenly distributed has a plurality of tertiary infiltration holes on the circumference lateral wall of the end of intaking of tertiary perforation collecting pipe, the play water end of tertiary perforation collecting pipe is located the top of level four filtering ponds.

The utility model discloses further set up to: level four filtering ponds include the level four plain soil tamp layer, level four metalling, the level four geotechnological cloth layer that permeates water, level four coarse sand layer, level four sandy soil layer and the green aquifer of planting of level four that set gradually from the lower, the green aquifer of planting of level four is provided with the communicating evacuation pipe with the overflow well with the junction of level four sandy soil layer.

The utility model discloses further set up to: and overflow pipe caps are arranged at the top ends of the first-stage perforated collecting pipe, the second-stage perforated collecting pipe and the third-stage perforated collecting pipe.

To sum up, the utility model discloses a beneficial technological effect does:

1. the drainage pressure in the flood season is relieved through multi-stage water storage by arranging a first-stage filtering tank, a second-stage filtering tank, a third-stage filtering tank and a fourth-stage filtering tank; the multistage purified rainwater can be directly used for road and greening spraying and the like, so that water resources are saved, and the utilization rate of the water resources is improved;

2. through the arrangement of the overflow pipe cap, the overflow port of the perforated collecting pipe can be covered on the plane by the overflow pipe cap, so that not only can the water body higher than the overflow port be discharged from the primary perforated collecting pipe, the secondary perforated collecting pipe and the tertiary perforated collecting pipe in time, but also impurities in the water body can be prevented from entering the primary perforated collecting pipe, the secondary perforated collecting pipe and the tertiary perforated collecting pipe, the cleanliness of the water body in the primary perforated collecting pipe, the secondary perforated collecting pipe and the tertiary perforated collecting pipe is ensured, and the blockage of the primary perforated collecting pipe, the secondary perforated collecting pipe and the tertiary perforated collecting pipe can be prevented;

3. through the one-level infiltration hole, the second grade infiltration hole, the setting in tertiary infiltration hole, not only guarantee the permeability of water, avoid taking place more serious ponding phenomenon, and the one-level is perforated the collecting pipe, the second grade is perforated the collecting pipe and the tertiary geotechnological cloth that permeates water of collecting outside of tubes package, can hold back the fine sand in the water, granular material such as little building stones, guarantee from the one-level perforation collecting pipe, the second grade is perforated the collecting pipe and the tertiary water body that punches the collecting pipe and flow out can directly be used to road and afforestation and spray etc. improve water resource utilization.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a schematic view showing a part of the structure of a primary filtration tank and a secondary filtration tank;

FIG. 3 is a partial schematic structural view for showing a secondary filtration tank and a tertiary filtration tank;

fig. 4 is a partial structural schematic diagram for showing the four-stage filtration tank and the overflow well.

In the figure, 1, a primary plain soil compaction layer; 11. a first-stage crushed stone layer; 12. a first-level permeable geotextile layer; 13. a first coarse sand layer; 14. a first sand layer; 15. a primary green plant water-storage layer; 16. a first-stage perforated collecting pipe; 161. a first-stage water seepage hole; 2. a second plain soil ramming layer; 21. a secondary crushed stone layer; 22. a second-stage permeable geotextile layer; 23. a second coarse sand layer; 24. a second sand layer; 25. a second green plant aquifer; 26. a secondary perforated collecting pipe; 261. a secondary seepage hole; 3. a third plain soil compaction layer; 31. a third crushed stone layer; 32. a three-stage permeable geotextile layer; 33. a third coarse sand layer; 34. a third sand layer; 35. a third-level green plant water storage layer; 36. a three-stage perforated collecting pipe; 361. a third-level water seepage hole; 4. a four-level plain soil compaction layer; 41. a fourth-stage crushed stone layer; 42. a four-stage permeable geotextile layer; 43. a four-level coarse sand layer; 44. a four-level sandy soil layer; 45. a four-level green plant water storage layer; 46. emptying the pipe; 5. an overflow pipe cap; 6. an overflow well; 61. an overflow well cover; 62. and a water discharge pipe.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to fig. 1 and 2, for the utility model discloses a multistage retaining sponge facility, including highly degressive one-level filtering ponds in proper order, second grade filtering ponds, tertiary filtering ponds and level four filtering ponds, the one-level filtering ponds include from the supreme one-level plain soil tamp layer 1 that sets gradually down, one-level metalling 11, one-level geotechnological cloth layer 12 that permeates water, one-level coarse sand layer 13, one-level sand layer 14 and the green aquifer reservoir 15 of planting of one-level, the degree of compaction of one-level plain soil tamp layer 1 is greater than or equal to 90%; the first-stage gravel layer 11 comprises a plurality of 20-30 mm-sized gravel, and the thickness of the first-stage gravel layer 11 is 300 mm; the thickness of the primary coarse sand layer 13 is 400 mm; the primary sand layer 14 has a thickness of 300 mm. The primary crushed stone layer 11 is internally provided with a primary perforated collecting pipe 16 with an L-shaped section, and the nominal diameter of the primary perforated collecting pipe 16 is 100 mm.

Referring to fig. 1 and 2, a plurality of primary water seepage holes 161 are uniformly distributed on the circumferential side wall of the water inlet end of the primary perforated collecting pipe 16, and the water outlet end of the primary perforated collecting pipe 16 is located above the secondary filtering tank. The primary water seepage holes 161 not only ensure the permeability of water body and avoid serious water accumulation on the ground, but also surround the primary perforated collecting pipe 16 with a primary water permeable geotextile layer 12, wherein the primary water permeable geotextile layer 12 has the specification of 200 plus 300 g/square meter. The first-level permeable geotextile layer 12 can intercept granular substances such as fine sand, small stones and the like in a water body, and ensures that the water body flowing out of the first-level perforated collecting pipe 16 can be directly used for road and greening spraying and the like.

Referring to fig. 2 and 3, the second-stage filtration tank comprises a second-stage rammed earth layer 2, a second-stage gravel layer 21, a second-stage permeable geotextile layer 22, a second-stage coarse sand layer 23, a second-stage sandy soil layer 24 and a second-stage green plant water storage layer 25 which are sequentially arranged from bottom to top. The primary perforated collecting pipe 16 sequentially penetrates out of the primary crushed stone layer 11, the secondary crushed stone layer 21, the secondary permeable geotextile layer 22, the secondary coarse sand layer 23, the secondary sand layer 24 and the secondary green plant water storage layer 25. The second-stage lithotripsy layer 21 is internally provided with a second-stage perforated collecting pipe 26 with an L-shaped section, and the water inlet end of the second-stage perforated collecting pipe 26 is arranged below the first-stage perforated collecting pipe 16 in parallel. A plurality of secondary water seepage holes 261 are uniformly distributed on the circumferential side wall of the water inlet end of the secondary perforated collecting pipe 26, and the water outlet end of the secondary perforated collecting pipe 26 is positioned above the tertiary filter tank.

Referring to fig. 2 and 3, the third-stage filtration tank comprises a third-stage rammed earth layer 3, a third-stage gravel layer 31, a third-stage permeable geotextile layer 32, a third-stage coarse sand layer 33, a third-stage sand layer 34 and a third-stage green plant water storage layer 35 which are sequentially arranged from bottom to top. The second-stage perforated collecting pipe 26 sequentially penetrates out of the second-stage gravel layer 21, the third-stage gravel layer 31, the third-stage permeable geotextile layer 32, the third-stage coarse sand layer 33, the third-stage sand layer 34 and the third-stage green plant water storage layer 35. The third-stage crushed stone layer 31 is internally provided with a third-stage perforated collecting pipe 36 with an L-shaped section, and the water inlet end of the third-stage perforated collecting pipe 36 is arranged below the second-stage perforated collecting pipe 26 in parallel. A plurality of third-stage water seepage holes 361 are uniformly distributed on the circumferential side wall of the water inlet end of the third-stage perforated collecting pipe 36, and the water outlet end of the third-stage perforated collecting pipe 36 is positioned above the fourth-stage filter tank.

Referring to fig. 1 and 4, the four-stage filtration tank comprises a four-stage rammed earth layer 4, a four-stage gravel layer 41, a four-stage permeable geotextile layer 42, a four-stage coarse sand layer 43, a four-stage sandy soil layer 44 and a four-stage green plant water storage layer 45 which are sequentially arranged from bottom to top. The downstream of level four filtering ponds is provided with overflow well 6, is provided with the drain pipe 62 of connecting the river course on the side of overflow well 6, is provided with overflow well lid 61 on the top surface of overflow well 6. The junction of the four-level green plant aquifer 45 and the four-level sandy soil layer 44 is provided with a drain pipe 46 communicated with the overflow well 6. In order to prevent foreign matters from entering the primary perforated collecting pipe 16, the secondary perforated collecting pipe 26 and the tertiary perforated collecting pipe 36, the top ends of the primary perforated collecting pipe 16, the secondary perforated collecting pipe 26 and the tertiary perforated collecting pipe 36 are all provided with overflow pipe caps 5.

The implementation principle of the embodiment is as follows: during rainfall, rainwater firstly passes through the primary filter tank, enters the primary perforated collecting pipe 16 in the primary crushed stone layer 11 from the primary green plant water storage layer 15, the primary sand layer 14, the primary coarse sand layer 13 and the primary permeable geotextile layer 12 in sequence, and then overflows to the secondary filter tank through the overflow pipe cap 5 of the primary perforated collecting pipe 16;

rainwater passes through the secondary filter tank, enters a secondary perforated collecting pipe 26 in the secondary gravel layer 21 from the secondary green plant water storage layer 25, the secondary sand layer 24, the secondary coarse sand layer 23 and the secondary permeable geotextile layer 22 in sequence, and then overflows to the tertiary filter tank through an overflow pipe cap 5 of the secondary perforated collecting pipe 26;

rainwater sequentially enters the three-stage perforated collecting pipe 36 in the three-stage gravel layer 31 from the three-stage green plant water storage layer 35, the three-stage sand layer 34, the three-stage coarse sand layer 33 and the three-stage permeable geotextile layer 32 through the three-stage filter tank, and then overflows to the four-stage filter tank through the overflow pipe cap 5 of the three-stage perforated collecting pipe 36;

the rainwater passes through the four-stage filter tank, and sequentially enters the second-stage gravel layer 21 from the second-stage green plant water storage layer 25, the second-stage sandy soil layer 24, the second-stage coarse sand layer 23 and the second-stage permeable geotextile layer 22, when the water level submerges the emptying pipe 46, the rainwater enters the overflow well 6 along the emptying pipe 46, and finally is discharged into the river channel from the drainage pipe 62 of the overflow well 6.

Due to multi-stage water storage, the drainage pressure in the flood season is relieved; multistage purification's rainwater can directly be used for road and afforestation to spray etc. the water economy resource improves water resource utilization ratio.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (6)

1. The utility model provides a multistage retaining sponge facility which characterized in that: including highly degressive first-order filtering ponds, second grade filtering ponds, tertiary filtering ponds and level four filtering ponds in proper order, the low reaches of level four filtering ponds are provided with overflow well (6), be provided with drain pipe (62) of connecting the river course on the side of overflow well (6), be provided with overflow well lid (61) on the top surface of overflow well (6).

2. The multi-stage water-storage sponge facility as claimed in claim 1, wherein: the primary filter pond includes from supreme one-level plain soil tamp layer (1), one-level metalling (11), the one-level geotechnological cloth layer (12), one-level coarse sand layer (13), one-level sand bed (14) and the green aquifer (15) of planting of one-level that set gradually down, it perforates collecting pipe (16) to have the one-level that the cross-section is the L type in one-level metalling (11), evenly distributed has a plurality of one-level holes of permeating water (161) on the circumference lateral wall of the end of intaking of one-level perforation collecting pipe (16), the play water end of one-level perforation collecting pipe (16) is located the top of secondary filter pond.

3. The multi-stage water-storage sponge facility as claimed in claim 2, wherein: the second grade filtering ponds include from supreme second grade plain soil tamp layer (2), the second grade gravel layer (21), the second grade geotechnological cloth layer (22), the second grade coarse sand layer (23), second grade sand bed (24) and the green aquifer (25) of planting of second grade that set gradually down, be equipped with second grade perforation collecting pipe (26) that the cross-section is the L type in second grade gravel layer (21), evenly distributed has a plurality of second grade holes of seeping (261) on the circumference lateral wall of the end of intaking of second grade perforation collecting pipe (26), the play water end of second grade perforation collecting pipe (26) is located the top of tertiary filtering ponds.

4. The multi-stage water-storage sponge facility as claimed in claim 3, wherein: tertiary filtering ponds include from supreme tertiary plain soil tamp layer (3), tertiary rubble layer (31), the tertiary geotechnological cloth layer (32) that permeates water, tertiary coarse sand layer (33), tertiary sand layer (34) and the green aquifer (35) of planting of tertiary of setting gradually down, tertiary rubble layer (31) endocyst has tertiary perforation collecting pipe (36) that the cross-section is the L type, evenly distributed has a plurality of tertiary holes of permeating water (361) on the circumference lateral wall of the end of intaking of tertiary perforation collecting pipe (36), the play water end of tertiary perforation collecting pipe (36) is located the top of level four filtering ponds.

5. The multi-stage water-storage sponge facility as claimed in claim 4, wherein: the level four filtering ponds include level four plain soil tamp layer (4), level four metalling (41), the level four geotechnological cloth layer (42) that permeates water, level four coarse sand layer (43), level four sandy soil layer (44) and the green aquifer (45) of planting of level four that set gradually from supreme down, the green aquifer (45) of planting of level four is provided with communicating evacuation pipe (46) with overflow well (6) with the junction of level four sandy soil layer (44).

6. The multi-stage water-storage sponge facility as claimed in claim 4, wherein: and overflow pipe caps (5) are arranged at the top ends of the primary perforated collecting pipe (16), the secondary perforated collecting pipe (26) and the tertiary perforated collecting pipe (36).

Images