CN211973796U - Novel rainwater underground disconnection system - Google Patents
Novel rainwater underground disconnection system Download PDFInfo
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- CN211973796U CN211973796U CN202020590291.5U CN202020590291U CN211973796U CN 211973796 U CN211973796 U CN 211973796U CN 202020590291 U CN202020590291 U CN 202020590291U CN 211973796 U CN211973796 U CN 211973796U
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Abstract
The utility model discloses a novel rainwater underground disconnection system, which comprises a ground rainwater inlet, an initial rainwater receiving unit, a water inlet pipe, a sand setting rainwater well, a water outlet pipe, a water outlet blind pipe and a sponge unit, wherein the water outlet blind pipe and the sponge unit are all positioned below a project public greenbelt; rainwater reaches the initial rainwater receiving unit through the ground rainwater inlet to primarily settle sand, and then flows to a sand-settling rainwater well to cut off the continuity of rainwater, so that the flow direction of the rainwater is changed; when the rainfall is smaller or does not exceed the storage capacity of the sponge unit, rainwater enters the sponge unit from the water outlet blind pipe through the sand-settling catch basin to be stored in a stagnation way and seeps and reversely feeds underground water; when the rainfall is large or exceeds the regulation and storage volume of the sponge units, the rainwater exceeding the stagnation and storage volume of the sponge units is discharged from the original rainwater pipe network. The utility model provides a rainwater underground disconnection system principle is simple, and the structure is simple and easy, simple to operate, and application scope is wide, can effectively realize the sponge effect in place to guarantee the water security in place in the rainstorm period, be fit for using widely.
Description
Technical Field
The utility model relates to a rainwater drainage and sponge city low influence development design technical field especially relate to a novel rainwater underground system of breaking contact.
Background
In the urbanization process, the traditional method is mainly used in the traditional urban drainage system design in China, the rapid drainage of rainwater is taken as a basic starting point, the drainage system mostly adopts a continuous drainage mode consisting of gray infrastructures, and a large amount of rainwater directly enters a drainage pipe network. The design idea of mainly arranging has the following defects: on one hand, huge pressure is caused to an urban drainage system, the urban inland inundation risk is increased, and on the other hand, the vain loss of a large amount of rainwater resources is also caused.
The surface runoff is generated from hard ground or a roof, the rainwater disconnection means that the surface runoff is controlled in a mode of simulating natural water circulation, the surface runoff enters infiltration or stagnation facilities arranged on the ground, such as a high-position flower bed, a rainwater garden, a concave greenbelt and the like, and is intercepted in a mode of infiltration or stagnation, so that the continuity of the runoff is damaged, the effects of reducing runoff and rainwater collection, storage and utilization are achieved, the phenomenon that the surface runoff directly enters a pipe network and is not effectively controlled is avoided, urban inland inundation is relieved to a certain extent, and the rainwater can be recycled. However, in a new construction or reconstruction project, the rainwater disconnection faces more limiting conditions, such as the external facade of a building is affected, the public greenbelt is limited, the area of a hard road surface is large, the basement roof is not covered with soil sufficiently, or most rainwater pipes buried to go out of the house are difficult to treat, and secondly, in a heavy rain period, the storage capacity of the ground LID facility is small, more rainwater is directly discharged through an overflow pipe network, and the purpose of 'seeping, storage, purification, utilization and discharge' of a sponge city cannot be achieved.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem among the above-mentioned background art, the utility model provides a novel rainwater is system of connecing absolutely in underground, the rainwater reaches the initial stage rainwater through ground rainwater entry and accepts the preliminary sand setting of unit, flows to the sand setting catch basin again and cuts the rainwater continuity, changes the rainwater flow direction, and during general rainfall, the rainwater gets into the sponge unit through the play water blind pipe and stagnates and oozes and reverse the groundwater of feeding, during the super large rainfall, surpasss the sponge unit and stagnates and hold volumetric rainwater and discharge from original rainwater pipe network. The utility model provides a rainwater underground disconnection system principle is simple, and the structure is simple and easy, simple to operate, and application scope is wide, can effectively realize the sponge effect in place, is fit for using widely.
The utility model discloses a following technical scheme realizes:
a novel rainwater underground disconnection system comprises a ground rainwater inlet, an initial rainwater receiving unit, a water inlet pipe, a sand setting rainwater well, a water outlet pipe, a water outlet blind pipe and a sponge unit, wherein the ground rainwater inlet, the initial rainwater receiving unit, the water inlet pipe, the sand setting rainwater well, the water outlet pipe, the water outlet blind pipe and the sponge unit are all positioned below a project public green land;
the ground rainwater inlet is connected with an initial rainwater receiving unit, the initial rainwater receiving unit is connected with a water inlet pipe, the water inlet pipe is connected with a sand setting catch basin, the sand setting catch basin is connected with a water outlet pipe, and the water is received out of a general catch basin or a municipal catch basin through the water outlet pipe; the sand setting catch basin is also connected with a water outlet blind pipe, and the water outlet blind pipe is connected with the sponge unit; the water outlet blind pipe is higher than the bottom position of the sand setting catch basin;
the ground rainwater inlet is used for guiding rainwater to enter the interface of the initial rainwater receiving unit; the initial rainwater receiving unit is used for connecting the initial receiving unit in front of the sand setting rainwater well; the water inlet pipe is arranged between the initial rainwater receiving unit and the sand setting catch basin and is used for rainwater to flow through the channel; the sand setting catch basin plays a role in disconnection and connection, and regulates and controls a rainwater flowing way; the sponge unit plays a role in stagnation and storage, is used for stagnation and storage of rainwater to be regulated and controlled, which is introduced through the water outlet blind pipe, and seeps underground water reversely;
rainwater reaches the initial rainwater receiving unit through the ground rainwater inlet to primarily settle sand, and then flows to a sand settling rainwater well, and the sand settling rainwater well cuts off the continuity of rainwater, so that the flow direction of the rainwater is changed; and then certain volume of rainwater is accumulated through the sponge units.
The working principle is as follows: the rainwater is limited by site conditions such as non-uniform facade styles of buildings, limited public greenbelts, large hard pavement area, insufficient earth covering of basement roofs, or difficult treatment of most rainwater pipes buried in the ground to go out of households, and the like, so that the disconnection on the ground cannot be realized. By adopting the scheme, the rainwater reaches the initial rainwater bearing unit through the ground rainwater inlet to primarily settle sand, and then flows to the sand settling rainwater well to cut off the rainwater continuity, so that the rainwater flow direction is changed; when the rain falls generally (namely the rain amount is smaller or does not exceed the storage capacity of the sponge unit), rainwater enters the sponge unit from the water outlet blind pipe through the sand setting rainwater well for storage and seeps and regurgitates underground water; when the rainfall is large or exceeds the regulation and storage volume of the sponge units, the rainwater exceeding the stagnation and storage volume of the sponge units is discharged from the original rainwater pipe network.
The utility model provides a rainwater underground disconnection system, which combines the initial rainwater purification, rainwater regulation and storage and rainwater utilization into an integral rainwater underground disconnection system; the utility model discloses the principle is simple, and the structure is simple and easy, simple to operate, and application scope is wide, can effectively realize the sponge effect in place to guarantee the water safety in place in the rainstorm period, be fit for using widely.
The utility model is suitable for a restricted condition is few like public greenery patches, ground LID facility regulation volume is too little, mostly is the roofing rainwater riser that buries the ground play etc. can't carry out the project that the rainwater disconnected connects with ground.
Preferably, a baffle plate a and a baffle plate b are vertically arranged in the sand setting rainwater well, and the baffle plate a is used for cutting off rainwater so that the rainwater falls into the bottom of the sand setting rainwater well for secondary sand setting;
the baffle b is used for regulating and controlling the flow direction of rainwater, and when the rainfall is smaller or does not exceed the storage capacity of the sponge unit, the rainwater enters the sponge unit from the water outlet blind pipe; when the rainfall is larger or exceeds the regulation volume of the sponge unit, the rainwater is discharged from the water outlet pipe.
Preferably, the upper end of the baffle plate a is not lower than the elevation of the top of the water inlet pipe, and the lower end of the baffle plate a is not lower than the elevation of the bottom of the water inlet pipe by 500 mm;
the upper end of the baffle b is higher than the bottom end of the baffle a and is 200mm lower than the bottom end of the water outlet pipe.
Preferably, the periphery of the sponge unit is provided with a closed brick masonry, the interior of the sponge unit sequentially comprises a coarse gravel isolation layer, a water seepage geotextile and a gravel layer from bottom to top, and the storage volume is calculated according to 30% of the volume of the gravel layer;
the gravel layer is used for storing part of rainwater, so that the rainwater slowly seeps downwards and reversely feeds underground water; the depth is determined according to the rainwater runoff required to be controlled by the project, and the exterior is wrapped by water-permeable geotextile;
the coarse sand and stone isolating layer is used for bearing rainwater infiltrated by the gravel layer through the water-permeable geotextile and continuously infiltrating underground soil.
Preferably, the bottom of the coarse sand-stone isolation layer is higher than the ground water level by more than 1.2m and has the thickness of 100mm and the particle size of 10-30 mm; the water seepage geotextile is 200g/m2(ii) a The particle size of the gravel layer is 30-50 mm.
Preferably, the sand setting catch basin is provided with a plurality of sand setting catch wells, and when the plurality of sand setting catch wells are provided, the plurality of sand setting catch wells are arranged in series.
Preferably, the length of the water outlet blind pipe is greater than the thickness of the well wall of the sand setting catch basin, and the diameter of the water outlet blind pipe is 150 mm.
Preferably, the ground rainwater inlet is a roof rainwater drop pipe or a rainwater port in the site.
Preferably, the initial rainwater receiving unit is a building water-spreading ditch or a ditch in a field or a general rainwater well.
Preferably, the water inlet pipe and the water outlet pipe are rain pipe network main pipes in the project site.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. the utility model relates to a novel rainwater underground disconnection system, rainwater reaches the primary rainwater receiving unit through the ground rainwater inlet and preliminarily settles sand, then flows to a sand-settling rainwater well to cut off the continuity of rainwater, and the flow direction of rainwater is changed; when the rain falls generally (namely the rain amount is smaller or does not exceed the storage capacity of the sponge unit), rainwater enters the sponge unit from the water outlet blind pipe through the sand setting rainwater well for storage and seeps and regurgitates underground water; when the rainfall is large or exceeds the storage capacity of the sponge units, the rainwater exceeding the storage capacity of the sponge units is discharged from the original rainwater pipe network;
2. the utility model relates to a novel rainwater underground disconnection system, which combines the initial rainwater purification, rainwater regulation and storage and rainwater utilization into an integral rainwater underground disconnection system; the utility model has simple principle, simple structure, convenient installation and wide application range, can effectively realize the sponge effect of the field, ensures the water safety of the field in the rainstorm period, and is suitable for popularization and use;
3. the utility model is suitable for a restricted condition is few like public greenery patches, ground LID facility regulation volume is too little, mostly is the roofing rainwater riser that buries the ground play etc. can't carry out the project that the rainwater disconnected connects with ground.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is the utility model relates to a novel rainwater underground disconnection system structure schematic diagram.
Fig. 2 is the structural schematic diagram of the sand setting catch basin of the utility model.
Fig. 3 is the lapping schematic diagram of the sand setting catch basin and the sponge unit of the utility model.
Reference numbers and corresponding part names in the drawings:
1-ground rainwater inlet, 2-initial rainwater receiving unit, 3-water inlet pipe, 4-sand setting rainwater well, 5-baffle a, 6-baffle b, 7-water outlet blind pipe, 8-water outlet pipe, 9-sponge unit, 10-general rainwater well, 11-municipal pipe network, 12-brick masonry, 13-gravel layer, 14-water permeable geotextile, 15-coarse gravel isolation layer, 16-mud setting area, 17-underground water and 18-natural soil.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Examples
As shown in fig. 1 to 3, the utility model relates to a novel rainwater underground disconnection system, which comprises a ground rainwater inlet 1, an initial rainwater receiving unit 2, a water inlet pipe 3, a sand setting rainwater well 4, a water outlet pipe 8, a water outlet blind pipe 7 and a sponge unit 9, all of which are positioned under the public green land of the project; the ground rainwater inlet 1 is connected with an initial rainwater receiving unit 2, the initial rainwater receiving unit 2 is connected with a water inlet pipe 3, the water inlet pipe 3 is connected with a sand setting rainwater well 4, the sand setting rainwater well 4 is connected with a water outlet pipe 8, and the water is received out of a general rainwater well 10 or a municipal rainwater well through the water outlet pipe 8; the sand setting catch basin 4 is also connected with a water outlet blind pipe 7, and the water outlet blind pipe 7 is connected with a sponge unit 9; the water outlet blind pipe 7 is higher than the bottom position of the sand setting catch basin 4;
the ground rainwater inlet 1 is used for guiding rainwater to enter a connector of the initial rainwater receiving unit 2; the initial rainwater receiving unit 2 is used for connecting an initial receiving unit in front of the sand setting rainwater well 4; the water inlet pipe 3 is arranged between the initial rainwater receiving unit 2 and the sand setting catch basin 4 and is used for rainwater to flow through the channel; the sand setting catch basin 4 plays a role in disconnection and connection, and regulates and controls a rainwater flowing path; the sponge unit 9 plays a role in stagnation and storage, is used for stagnation and storage of rainwater to be regulated and controlled, which is introduced through the water outlet blind pipe 7, and seeps underground water reversely;
rainwater reaches the initial rainwater receiving unit 2 through the ground rainwater inlet 1 for primary sand setting and then flows to the sand setting rainwater well 4, and the sand setting rainwater well 4 cuts off the continuity of rainwater, so that the flow direction of the rainwater is changed; and further accumulates a certain volume of rainwater through the sponge unit 9.
As a further preferable scheme, a baffle a5 and a baffle b6 are vertically arranged in the sand setting catch basin 4, and the baffle a5 is used for cutting off rainwater so that the rainwater falls into the bottom of the sand setting catch basin 4 for sand setting again;
the baffle b6 is used for regulating and controlling the flow direction of rainwater, and when the rainfall is small or does not exceed the storage capacity of the sponge unit 9, the rainwater enters the sponge unit 9 from the water outlet blind pipe 7; when the rainfall is larger or exceeds the storage capacity of the sponge unit 9, the rainwater is discharged from the water outlet pipe 8.
The upper end of the baffle a5 is not lower than the elevation of the top of the water inlet pipe 3, and the lower end of the baffle a5 is lower than the elevation of the bottom of the water inlet pipe 3 and is not less than 500 mm;
the upper end of the baffle b6 is higher than the bottom end of the baffle a5 and is 200mm lower than the bottom end of the water outlet pipe 8.
As a further preferable scheme, the periphery of the sponge unit 9 is provided with a closed brick masonry 12, the inside of the sponge unit 9 is sequentially provided with a coarse gravel isolation layer 15, a water permeable geotextile 14 and a gravel layer 13 from bottom to top, and the storage volume is calculated according to 30% of the volume of the gravel layer 13;
the gravel layer 13 is used for storing part of rainwater, so that the rainwater slowly seeps downwards and reversely feeds underground water; the depth is determined according to the rainwater runoff required to be controlled by the project, the exterior is wrapped by the water-permeable geotextile,
and the coarse sand-stone isolating layer 15 is used for bearing rainwater infiltrated by the gravel layer 13 through the water-permeable geotextile 14 and continuously infiltrating underground soil.
The bottom of the coarse sand-stone isolation layer 15 is higher than the ground water level by more than 1.2m, and the thickness of the coarse sand-stone isolation layer is 100mm, and the particle size is 10-30 mm; the water-permeable geotextile 14 is 200g/m2(ii) a The particle size of the gravel layer 13 is 30-50mm, and the depth is determined according to the regulation of rainwater volume required by the project.
As a further preferable scheme, the sand setting catch basin 4 is provided with a single or a plurality of sand setting catch basins 4, and when the sand setting catch basin 4 is provided with a plurality of sand setting catch basins, the plurality of sand setting catch basins are arranged in series.
As a further preferable scheme, the length of the water outlet blind pipe 7 is greater than the thickness of the well wall of the sand setting catch basin 4, and the diameter of the water outlet blind pipe 7 is 150 mm. The number of the water outlet blind pipes 7 is not limited to 1, and a plurality of water outlet blind pipes can be arranged according to the condition of the project.
As a further preferable scheme, the ground rainwater inlet 1 is a roof rainwater drop pipe or a rainwater port in a site.
As a further preferable mode, the initial rainwater receiving unit 2 is a construction loose water ditch or an in-site ditch or a general rainwater well.
As a further preferable scheme, the water inlet pipe 3 and the water outlet pipe 8 are both rain pipe network main pipes in a project site.
The working principle is as follows: the rainwater is limited by site conditions such as non-uniform facade styles of buildings, limited public greenbelts, large hard pavement area, insufficient earth covering of basement roofs, or difficult treatment of most rainwater pipes buried in the ground to go out of households, and the like, so that the disconnection on the ground cannot be realized. By adopting the scheme, the rainwater reaches the initial rainwater receiving unit 2 through the ground rainwater inlet 1 to primarily settle sand and then flows to the sand settling rainwater well 4, the sand settling rainwater well 4 cuts off the rainwater continuity, and the rainwater flow direction is changed; when the rain falls generally (namely the rain amount is smaller or does not exceed the storage capacity of the sponge unit 9), the rain water passes through the sand setting rain well 4, passes through the baffle b6, enters the sponge unit 9 from the water outlet blind pipe 7 to be stored and seeps back to the underground water 17; when the rainfall is large or exceeds the storage volume of the sponge unit 9, the rainwater flows over the baffle b6, and the rainwater exceeding the storage volume of the sponge unit 9 enters the general rainwater well 10 or the municipal pipe network 11 to be discharged.
The utility model provides a rainwater underground disconnection system, which combines the initial rainwater purification, rainwater regulation and storage and rainwater utilization into an integral rainwater underground disconnection system; the utility model discloses the principle is simple, and the structure is simple and easy, simple to operate, and application scope is wide, can effectively realize the sponge effect in place to guarantee the water safety in place in the rainstorm period, be fit for using widely.
The utility model is suitable for a restricted condition is few like public greenery patches, ground LID facility regulation volume is too little, mostly is the roofing rainwater riser that buries the ground play etc. can't carry out the project that the rainwater disconnected connects with ground.
In fig. 2, h1 is the pipe top height of the water inlet pipe 3, h2 is the pipe bottom height of the water inlet pipe 3, h3 is the plate top height of the baffle a5, h4 is the plate bottom height of the baffle a5, h5 is the plate top height of the baffle b6, h6 is the pipe bottom height of the water outlet blind pipe 7, and h7 is the pipe bottom height of the water outlet pipe 8.
When in implementation: firstly, rainwater is connected into an initial rainwater receiving unit 2 through a ground rainwater inlet 1 for initial abandoning, and enters a sand setting catch basin 4 through a water inlet pipe 3, and the sand setting catch basin 4 can be arranged singly or in series according to project requirements.
Secondly, as shown in fig. 2, a baffle plate a5 and a baffle plate b6 are arranged on the inner wall of the sand setting catch basin 4, the plate top h3 of the baffle plate a5 is not lower than the pipe top h1 of the water inlet pipe 3, and the plate bottom h4 is not lower than the pipe bottom h2 of the water inlet pipe 3 and is not smaller than 500mm, so that rainwater is cut off and falls into the sediment zone 16 at the bottom of the sand setting catch basin 4 for sand setting again; the upper end h5 of the baffle b6 is higher than the plate bottom h4 of the baffle a5 and lower than the bottom h 7200 mm of the water outlet pipe 8, and is used for regulating the flow direction of rainwater.
When the rainfall is small or does not exceed the storage capacity of the sponge unit 9, rainwater passes through the baffle b6 and enters the sponge unit 9 from the water outlet blind pipe 7, as shown in fig. 2 and 3, the length of the water outlet blind pipe 7 is larger than the thickness of the well wall of the sand setting rainwater well 4, the diameter is 150mm, the number of the water outlet blind pipes is not limited to 1, and a plurality of the water outlet blind pipes can be arranged according to the conditions of the project; the outer range of the sponge unit 9 is brick masonry 12 with closed periphery, the plane of fig. 3 is only schematic, and the actual plane is determined according to the total level of the project; the sponge unit 9 is internally provided with a coarse sand isolating layer 15 with the thickness of 100mm and the grain diameter of 10-30mm and a coarse sand isolating layer 200g/m from bottom to top in sequence2A water permeable geotextile 14 and a gravel layer 13 with the particle size of 30-50 mm; the bottom of the coarse sand-stone isolating layer 15 is higher than the ground water level 17 by more than 1.2m, receives rainwater seeped downwards from the gravel layer 13 through the water-permeable geotextile 14, and continuously seeps downwards into the natural soil 18; the storage volume of the sponge unit 9 is calculated according to 30% of the volume of the gravel layer 13, the depth of the gravel layer 13 is determined according to the rainwater runoff quantity required to be controlled by a project, and the outside of the gravel layer 13 is wrapped by the water-permeable geotextile 14 for storing part of rainwater, so that the rainwater slowly seeps downwards and reversely feeds underground water.
As shown in fig. 1 and 3, when the rainfall is large or exceeds the storage capacity of the sponge unit 9, the rainwater flows over the baffle b6 and enters a general rainwater well 10 or a municipal pipe network 11 from the water outlet pipe 8 to be discharged.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A novel rainwater underground disconnection system is characterized by comprising a ground rainwater inlet (1), an initial rainwater receiving unit (2), a water inlet pipe (3), a sand setting rainwater well (4), a water outlet pipe (8), a water outlet blind pipe (7) and a sponge unit (9), wherein the ground rainwater inlet, the initial rainwater receiving unit, the water inlet pipe (3), the sand setting rainwater well, the water outlet pipe (8), the water outlet blind pipe (7) and the sponge unit (9) are all positioned below a; the ground rainwater inlet (1) is connected with an initial rainwater receiving unit (2), the initial rainwater receiving unit (2) is connected with a water inlet pipe (3), the water inlet pipe (3) is connected with a sand setting rainwater well (4), the sand setting rainwater well (4) is connected with a water outlet pipe (8), and the water is discharged to a general rainwater well (10) or a municipal rainwater well through the water outlet pipe (8); the sand setting catch basin (4) is also connected with a water outlet blind pipe (7), and the water outlet blind pipe (7) is connected with a sponge unit (9); the water outlet blind pipe (7) is higher than the bottom position of the sand setting catch basin (4);
the ground rainwater inlet (1) is used for guiding rainwater to enter a connector of the initial rainwater receiving unit (2); the initial rainwater receiving unit (2) is used for connecting the initial receiving unit in front of the sand setting rainwater well (4); the water inlet pipe (3) is arranged between the initial rainwater receiving unit (2) and the sand setting rainwater well (4) and is used for rainwater to flow through the channel; the sand setting catch basin (4) plays a role in disconnection and connection, and regulates and controls a rainwater flow path; the sponge unit (9) plays roles of stagnation storage and infiltration, is used for stagnation storage of rainwater which is guided in through the water outlet blind pipe (7) and needs to be regulated and controlled, and infiltrates and reversely feeds underground water;
rainwater reaches the initial rainwater receiving unit (2) through the ground rainwater inlet (1) for primary sand setting and then flows to the sand setting rainwater well (4), the sand setting rainwater well (4) cuts off the continuity of rainwater, and the flow direction of the rainwater is changed; and then the sponge unit (9) accumulates certain volume of rainwater.
2. A novel rainwater underground disconnection system according to claim 1, wherein a baffle a (5) and a baffle b (6) are vertically arranged in the sand-settling rainwater well (4), the baffle a (5) is used for cutting off rainwater, so that the rainwater falls into the bottom of the sand-settling rainwater well (4) for secondary sand settling;
the baffle b (6) is used for regulating and controlling the flow direction of rainwater, and when the rainfall is small or does not exceed the storage capacity of the sponge unit (9), the rainwater enters the sponge unit (9) from the water outlet blind pipe (7); when the rainfall is larger or exceeds the storage capacity of the sponge unit (9), the rainwater is discharged from the water outlet pipe (8).
3. A novel rainwater underground disconnection system according to claim 2, wherein the upper end of the baffle a (5) is not lower than the pipe top elevation of the water inlet pipe (3), and the lower end of the baffle a (5) is not lower than the pipe bottom elevation of the water inlet pipe (3) by more than 500 mm;
the upper end of the baffle b (6) is higher than the bottom end of the baffle a (5) and is 200mm lower than the bottom end of the water outlet pipe (8).
4. A novel rainwater underground disconnection system according to claim 1, wherein the periphery of the sponge unit (9) is provided with a closed brick masonry (12), and the inside of the sponge unit (9) is sequentially provided with a coarse sand isolation layer (15), a water permeable geotextile (14) and a gravel layer (13) from bottom to top;
the gravel layer (13) is used for storing part of rainwater, so that the rainwater slowly seeps downwards and reversely feeds underground water;
the coarse gravel isolation layer (15) is used for bearing rainwater seeped downwards from the gravel layer (13) through the water seepage geotextile (14) and continuously seeping into underground soil.
5. A novel rainwater underground disconnection system according to claim 4, wherein the bottom of the coarse gravel isolation layer (15) is 1.2m higher than the underground water level and has the thickness of 100mm and the grain diameter of 10-30 mm; the water-permeable geotextile (14) is 200g/m2(ii) a The particle size of the gravel layer (13) is 30-50mm, and the depth is determined according to the regulation and storage of rainwater volume required by the project.
6. A novel rainwater underground disconnection system according to claim 1, wherein said sand-settling rainwater well (4) is provided with a single or a plurality of sand-settling rainwater wells (4), and when a plurality of sand-settling rainwater wells (4) are provided, a plurality of sand-settling rainwater wells are connected in series.
7. A novel rainwater underground disconnection system according to claim 1, characterized in that the length of the water outlet blind pipe (7) is larger than the thickness of the well wall of the sand setting rainwater well (4), and the diameter of the water outlet blind pipe (7) is 150 mm.
8. A novel rainwater underground disconnection system according to claim 1, characterized in that said ground rainwater inlet (1) is a roof rainwater downpipe or a rainwater inlet in a site.
9. A novel rainwater underground disconnection system according to claim 1, wherein said initial rainwater receiving unit (2) is a building sewer or an in-site ditch or a general rainwater well.
10. A novel rainwater underground disconnection system according to claim 1, characterized in that the inlet pipe (3) and the outlet pipe (8) are both rainwater pipe network main pipes in a project site.
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| CN202020590291.5U CN211973796U (en) | 2020-04-20 | 2020-04-20 | Novel rainwater underground disconnection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112663756A (en) * | 2020-12-17 | 2021-04-16 | 四川省建筑设计研究院有限公司 | Road surface inlet for stom water conservancy diversion cuts dirty device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112663756A (en) * | 2020-12-17 | 2021-04-16 | 四川省建筑设计研究院有限公司 | Road surface inlet for stom water conservancy diversion cuts dirty device |
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