CN217811437U - Water storage slow seepage type green land system - Google Patents

Abstract

The utility model discloses a type greenery patches system is oozed slowly in retaining aims at solving the greenery patches system and directly discharges the rainwater to the municipal pipe network, causes the not enough of the drainage pressure increase of municipal pipe network. The utility model comprises an ecological detention area and a water storage slow-seepage area which are lower than the ground, wherein a partition wall is arranged between the ecological detention area and the water storage slow-seepage area, the upper end of the partition wall is higher than the ground surface height of the ecological detention area and the water storage slow-seepage area, vegetation is planted on the ground surface of the ecological detention area, and perforated pipes are buried underground in the ecological detention area; an overflow weir is arranged at the upper end of the partition wall, and a rainwater overflow pipe is arranged above the water storage slow seepage area. The water storage slow seepage type green land system can effectively retain runoff rainwater, secondarily retain overproof rainwater, strengthen infiltration strength, reduce surface runoff in a rainy period, effectively delay rainfall flood peak and reduce drainage pressure of a municipal rainwater pipe network.

Description

Water storage slow-seepage type green land system

Technical Field

The utility model relates to a city rain and flood management technical field, more specifically say, it relates to a retaining type greenery patches system that oozes slowly.

Background

Along with the advancement of urbanization process, the scale of urban land is continuously enlarged, and the method of 'heavy gray and light green' causes waterlogging and ponding and even 'watching the sea' in rainy days in cities, so that the traditional urban construction mode is broken, the urban drainage mode needs to be deeply and negligibly applied, measures such as 'seepage, stagnation, storage, purification, use and drainage' are comprehensively applied, the influence of urban development and construction on ecological environment is furthest reduced, and rainwater in the field is locally absorbed and treated.

The sponge city is the core theory of modern city rainfall flood management, preferentially utilizes the natural drainage mode, gets rid of the interior rainwater of place, guarantees that the runoff coefficient after city development construction must not be greater than before the construction, has good "elasticity" in aspects such as coping with natural disasters and adaptation environment, can absorb water, retaining, seep water, water purification when raining, releases the water of depositing and utilizes when needing, plans the problem of solving city water safety, water environment, aquatic attitude and water resource altogether.

The urban green space system is an organic component of urban overall planning and reflects the natural attributes of cities. At the beginning of building cities by human site selection, most cities are selected to be adjacent to mountains, rivers and lakes, and the city configuration, the function layout and the city landscape are greatly influenced. Modern urban green land system is more and more high to the requirement of drainage, and the drainage is not smooth will lead to many urban problems, but present many green land systems directly discharge the rainwater in the municipal pipe network, cause the drainage pressure increase of municipal pipe network.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes the greenery patches system is direct to discharge the rainwater to the municipal pipe network in, causes the not enough of the drainage pressure increase of municipal pipe network, provides a retaining type greenery patches system that oozes slowly, and it can effectively be detained the runoff rainwater to carry out the secondary to the rainwater that exceeds standard and hold back, reinforce the infiltration intensity, reduce rainy period earth's surface runoff volume, effectively postpone rainfall flood peak, alleviate municipal rainwater pipe network drainage pressure.

In order to solve the technical problem, the utility model discloses a following technical scheme: a water storage slow-seepage type green land system comprises an ecological detention area and a water storage slow-seepage area which are lower than the ground, wherein a partition wall is arranged between the ecological detention area and the water storage slow-seepage area, the upper end of the partition wall is higher than the ground surface height of the ecological detention area and the water storage slow-seepage area, vegetation is planted on the ground surface of the ecological detention area, and perforated pipes are buried underground of the ecological detention area; an overflow weir is arranged at the upper end of the partition wall, and a rainwater overflow pipe is arranged above the water storage slow seepage area.

The ecological detention area receives rainwater from peripheral surface runoff, and the rainwater is drained into a municipal rainwater pipe network through the perforated pipe after infiltration. The excessive rainwater in the ecological detention area is discharged to the water storage slow seepage area through the overflow weir, the rainwater seeps downwards layer by layer in the area to supplement underground water resources, and the excessive rainwater is discharged to the municipal rainwater pipe network through the rainwater overflow pipe. The system can effectively reduce the peak value of the flood during the rainstorm and prolong the infiltration time of the rainwater. The water storage slow seepage type green land system can effectively retain runoff rainwater, secondarily retain overproof rainwater, strengthen infiltration strength, reduce surface runoff in a rainy period, effectively delay rainfall flood peak and reduce drainage pressure of a municipal rainwater pipe network.

As the preferred, ecological detention district from top to bottom has set gradually overburden, planting soil layer, the geotechnological cloth layer that permeates water, filler purification layer, rubble drainage blanket, and the perforated pipe is buried underground in the rubble drainage blanket.

The overburden sets up bark and organic matter, and the planting soil layer is favorable to the planting of vegetation, and the geotechnological cloth layer that permeates water has effectively kept apart planting soil layer and filler purification layer, makes two kinds of materials each other not mix, keeps the holistic structure of basis and function, strengthens the bearing capacity of structure. The perforated pipe is buried in the gravel drainage layer, so that the phenomenon of blockage of the perforated pipe is not easy to occur.

Preferably, the water storage slow seepage area is sequentially provided with a fine gravel layer, a medium sand filter layer, a permeable geotextile layer and a coarse gravel layer from top to bottom.

Rainwater in the water storage slow seepage area seeps downwards through the fine gravel layer, the medium sand filtering layer, the permeable geotextile layer and the coarse gravel layer from top to bottom to supplement underground water, rainwater which cannot seep downwards temporarily in time is stored in the area, and excessive rainwater is drained into the municipal rainwater pipe network nearby through the rainwater overflow pipe.

Preferably, a buffering slope is arranged between the ground and the ecological detention area, the upper end of the buffering slope is connected to the ground, the lower end of the buffering slope is connected to the ecological detention area, and a gravel buffering layer is paved on the buffering slope. The broken stone buffer layer on the buffer slope plays a good role in filtering water flow.

Preferably, the area ratio of the ecological retention area to the water storage slow-permeability area is 2: (1.2-0.8). The arrangement makes full use of the field space.

Preferably, the partition wall is a concrete wall. The concrete wall has good structural strength.

Preferably, one end of the perforated pipe is closed, the other end of the perforated pipe is connected to a municipal rainwater pipe, and a plurality of water through holes are distributed in the pipe wall of the perforated pipe. The limbers are convenient for seep water into the perforated pipe.

Preferably, the overflow weirs are arranged at intervals, the isolation piers are arranged between every two adjacent overflow weirs, and the upper ends of the isolation piers are planted with vegetation. A plurality of overflow weirs are arranged, and rainwater drainage is facilitated.

Compared with the prior art, the beneficial effects of the utility model are that: the water storage slow seepage type green land system can effectively retain runoff rainwater, secondarily retain overproof rainwater, strengthen infiltration strength, reduce surface runoff in a rainy period, effectively delay rainfall flood peaks and reduce drainage pressure of a municipal rainwater pipe network.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

in the figure: 1. ecological detention district, 2, the retaining is oozed the district slowly, 3, the partition wall, 4, vegetation, 5, perforated pipe, 6, overflow weir, 7, rainwater overflow pipe, 8, water impact piece, 9, overburden, 10, planting soil layer, 11, the geotechnological cloth layer that permeates water, 12, filler purification layer, 13, rubble drainage blanket, 14, fine gravel layer, 15, the middlings filter layer, 16, coarse gravel layer, 17, filter rubble, 18, rubble buffer layer, 19, hard shoulder.

Detailed Description

The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:

example (b): a water storage slow-seepage type green land system (see attached figure 1) comprises an ecological retention area 1 and a water storage slow-seepage area 2 which are lower than the ground, wherein a partition wall 3 is arranged between the ecological retention area and the water storage slow-seepage area, the upper end of the partition wall is higher than the ground surface height of the ecological retention area and the water storage slow-seepage area, vegetation 4 is planted on the ground surface of the ecological retention area, and a perforated pipe 5 is buried underground of the ecological retention area; partition wall upper end is equipped with overflow weir 6, and the retaining oozes district top installation rainwater overflow pipe 7 slowly, and rainwater overflow pipe is less than the overflow weir, and the retaining oozes the district earth's surface slowly and is close to partition wall position and overflow weir correspondence and places water impact piece 8.

Ecological detention district has set gradually overburden 9, planting soil layer 10, geotechnological cloth layer 11 that permeates water, filler purification layer 12, rubble drainage blanket 13 from top to bottom, and the perforated pipe is buried underground in the rubble drainage blanket. The filler purification layer is formed by paving after mixing broken stones and iron shavings. The volume ratio of the broken stone to the iron shavings is 1 (0.8-1.0).

The water storage slow seepage area is sequentially provided with a fine gravel layer 14, a medium sand filtering layer 15, a permeable geotextile layer and a coarse gravel layer 16 from top to bottom. The fine gravel layer adopts gravel with the diameter of 20 mm-40 mm, and the coarse gravel layer adopts gravel with the diameter of 30 mm-50 mm.

The partition wall adopts concrete wall, and the partition wall upper end is equipped with the overflow slope, and the overflow slope upper end is connected to the overflow weir, and the overflow slope lower extreme is connected to ecological detention district earth's surface, lays on the overflow slope and filters rubble 17. Set up the buffering slope between ground and the ecological detention district, buffering slope upper end is connected to ground, and buffering slope lower extreme is connected to ecological detention district, lays rubble buffer layer 18 on the buffering slope. The area ratio of the ecological detention area to the water storage slow-seepage area is 2: (1.2-0.8), the area ratio of the ecological detention area to the water storage slow-seepage area in the embodiment is 2:1. one end of the perforated pipe is closed, the other end of the perforated pipe is connected to a municipal rainwater pipe, and a plurality of water through holes are distributed in the pipe wall of the perforated pipe. A plurality of overflow weirs are arranged at intervals, a separation pier 19 is arranged between every two adjacent overflow weirs, and vegetation is planted at the upper end of the separation pier.

The ecological detention area receives rainwater from peripheral surface runoff, and the rainwater is discharged into a municipal rainwater pipe network through the perforated pipe after infiltration. The excessive rainwater in the ecological detention area is discharged to the water storage slow seepage area through the overflow weir, the rainwater seeps downwards layer by layer in the area to supplement underground water resources, and the excessive rainwater is discharged to a municipal rainwater pipe network through the rainwater overflow pipe. The system can effectively reduce the peak value of the flood during the rainstorm and prolong the infiltration time of the rainwater. The rivers that the overflow weir flows impact on the rivers impact piece, prevent that the rivers from impacting on the retaining earth's surface of oozing the district slowly, form the pit. The water storage slow-seepage type greenbelt system can effectively retain runoff rainwater, secondarily retain overproof rainwater, strengthen infiltration strength, reduce surface runoff in a rainy period, effectively delay rainfall flood peak, reduce drainage pressure of a municipal rainwater pipe network, enhance rainwater infiltration capacity and effectively realize functional action of sponge facilities.

The above-described embodiments are merely preferred and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (8)

1. A water storage slow-seepage type green land system is characterized by comprising an ecological detention area and a water storage slow-seepage area which are lower than the ground, wherein a partition wall is arranged between the ecological detention area and the water storage slow-seepage area, the upper end of the partition wall is higher than the ground surface height of the ecological detention area and the water storage slow-seepage area, vegetation is planted on the ground surface of the ecological detention area, and perforated pipes are buried underground in the ecological detention area; an overflow weir is arranged at the upper end of the partition wall, and a rainwater overflow pipe is arranged above the water storage slow seepage area.

2. The water storage slow penetration type greenbelt system according to claim 1, wherein the ecological detention zone is provided with a covering layer, a planting soil layer, a permeable geotextile layer, a filler purification layer and a gravel drainage layer in sequence from top to bottom, and the perforated pipe is embedded in the gravel drainage layer.

3. An impounded water slow-permeability type greenbelt system as claimed in claim 1 wherein the impounded water slow-permeability zone is provided with a fine gravel layer, a medium sand filter layer, a permeable geotextile layer, a coarse gravel layer in sequence from top to bottom.

4. The water-storage slow-permeability greenbelt system according to claim 1, wherein a buffer slope is arranged between the ground and the ecological retention area, the upper end of the buffer slope is connected to the ground, the lower end of the buffer slope is connected to the ecological retention area, and a broken stone buffer layer is paved on the buffer slope.

5. The water-storage slow-permeability greenbelt system according to claim 1, wherein the area ratio of the ecological retention area to the water-storage slow-permeability area is 2: (1.2-0.8).

6. A slow-permeability water-retaining greenbelt system according to any one of claims 1 to 5 wherein the partition walls are concrete walls.

7. A water storage slow-permeability type greenbelt system according to any one of claims 1 to 5, wherein one end of the perforated pipe is closed, the other end of the perforated pipe is connected to a municipal rainwater pipe, and a plurality of water through holes are arranged on the pipe wall of the perforated pipe.

8. A water storage slow-seepage type greenbelt system according to any one of claims 1 to 5, wherein a plurality of overflow weirs are arranged at intervals, a separation pier is arranged between two adjacent overflow weirs, and vegetation is planted at the upper end of the separation pier.

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