Stepped ecological grass planting ditch
By designing a stepped ecological grass planting ditch and using V-shaped trough and water storage trough structures, the problems of excessive water transmission and soil erosion of grass planting ditch are solved, and water load relief, peak water volume reduction and runoff reduction are achieved, which has enhanced the rainwater management capabilities of grass planting ditch.
Patent Information
- Application Number
- CN202422439530.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-10
AI Technical Summary
The existing grass planting ditches transmit water too fast, the hydraulic residence time is short, and landslides and soil erosion is easily caused when the slope is large.
A stepped ecological grass planting ditch is designed, the first V-shaped trough and the second V-shaped trough are set up, and a water storage trough is opened in the middle of the trough body, combining the plant layer, soil planting layer, brick brick layer and gravel layer, and the V-shaped trough is used to alleviate the water load, slow down the water peak, and prevent soil erosion.
Effectively alleviate the load of rainfall runoff, slow down the arrival time of water peak water volume, prevent soil erosion, increase the contact area of precipitation, efficiently reduce runoff, regulate runoff, store early rainwater, and slow down urban flooding.
Smart Images
Figure CN223135285U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of urban rainwater management, and particularly relates to a stepped ecological grassed swale. Background Technique
[0002] Urbanization has increased the area of impervious surfaces, leading to an increase in the total amount of precipitation runoff and pollutant load, and exacerbating the "rain island effect" and "pollution island effect" in cities. The concept of low impact development, abbreviated as LID, is a stormwater management and non-point source pollution treatment technology developed in the late 1990s of the 20th century. It aims to control the runoff and pollution generated by storms through decentralized and small-scale source control, making the developed area as close as possible to the natural hydrological cycle. LID low impact development is an ecological technology system that can easily realize the collection and utilization of urban rainwater, and its key lies in in-situ collection, natural purification, nearby utilization or recharge of groundwater.
[0003] As an important part of low impact development technology, the grassed swale currently has some problems: (1) The water transmission speed is too fast and the hydraulic retention time is short; (2) When the slope is large, the grassed swale is prone to landslides, and then it is prone to soil erosion. Content of the Utility Model
[0004] In view of the deficiencies of the prior art, the utility model provides a stepped ecological grassed swale, which overcomes the deficiencies of the prior art. By setting the first V-shaped groove and the second V-shaped groove, on the one hand, it can effectively relieve the water load caused by rainfall runoff and slow down the arrival time of the water peak, and on the other hand, it can prevent the problem of soil erosion on the slope surface after long-term operation.
[0005] To achieve the above purposes, the utility model is realized through the following technical solutions:
[0006] A stepped ecological grassed swale includes a trench body. A water storage tank is opened in the middle of the trench body. A first slope and a second slope are respectively arranged on both sides of the water storage tank. A plurality of first V-shaped grooves are evenly and horizontally arranged on the surface of the first slope, and a plurality of second V-shaped grooves are evenly and horizontally arranged on the surface of the second slope;
[0007] The trench body includes a plant layer, a planting soil layer, a block brick layer and a gravel layer. The block brick layer is laid above the gravel layer, the planting soil layer is laid above the block brick layer, and the plant layer is planted on the planting soil layer.
[0008] Preferably, a drain pipe is horizontally installed at the bottom of the gravel layer. A plurality of through holes are opened on the upper surface of the drain pipe. A water seepage channel is vertically arranged above each through hole. A plurality of water seepage ports are evenly arranged at the bottom of the first V-shaped groove and the bottom of the second V-shaped groove. The water seepage ports are communicated with the water seepage channels.
[0009] Preferably, a filter screen is installed on the surface of the water seepage opening.
[0010] Preferably, the thickness of the gravel layer is 100 mm, the particle size of each gravel in the gravel layer is 4 - 6 mm, the thickness of the block brick layer is 300 mm, the block brick layer includes quartz sand and natural zeolite, and the quartz sand is laid above the natural zeolite; the particle size of the quartz sand is 1 - 2 mm, and the particle size of the zeolite is 2 - 4 mm; the thickness of the planting soil layer is 100 mm.
[0011] Preferably, a permeable geotextile is laid between the planting soil layer and the block brick layer.
[0012] Preferably, the slope of the inclined surfaces on the sides of the first V-shaped groove and the second V-shaped groove away from the water storage tank is 1:1 - 1:3, and the slope of the inclined surfaces on the sides of the first V-shaped groove and the second V-shaped groove close to the water storage tank is 2:3.
[0013] The utility model provides a stepped ecological grass-planting ditch, which has the following beneficial effects: by providing the first V-shaped groove and the second V-shaped groove, on the one hand, it can effectively relieve the water volume load caused by rainfall runoff, and at the same time slow down the arrival time of the water volume peak; on the other hand, it can prevent the problem of soil and water loss on the slope surface caused by long-term operation. And through the action of the first V-shaped groove and the second V-shaped groove, the grass-planting ditch of the utility model has a larger contact area with precipitation, so that it can more efficiently and powerfully cut the peak value of rainfall runoff, regulate runoff, and further slow down urban waterlogging. In addition, by providing a water storage tank in the middle, the grass-planting ditch can store water under a certain water volume transmission, and is used to store the initial rainwater. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the prior art.
[0015] Figure 1 The transverse cross-sectional schematic diagram of the present utility model;
[0016] Figure 2 The radial cross-sectional schematic diagram of the present utility model;
[0017] The reference numerals in the drawings are explained as follows:
[0018] 1. Ditch body; 2. Water storage tank; 3. First slope; 4. Second slope; 5. First V-shaped groove; 6. Second V-shaped groove; 7. Plant layer; 8. Planting soil layer; 9. Block brick layer; 10. Gravel layer; 11. Drain pipe; 12. Water seepage channel; 13. Water seepage opening. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] To make the objectives, technical solutions, and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the present utility model.
[0020] Example 1, as Figures 1 to 2 shown, a stepped ecological grass-planting ditch includes a ditch body 1. A water storage tank 2 is provided in the middle of the ditch body 1. A first slope 3 and a second slope 4 are respectively arranged on both sides of the water storage tank 2. A plurality of first V-shaped grooves 5 are evenly and horizontally arranged on the surface of the first slope 3, and a plurality of second V-shaped grooves 6 are evenly and horizontally arranged on the surface of the second slope 4;
[0021] The ditch body 1 includes a plant layer 7, a planting soil layer 8, a block brick layer 9, and a gravel layer 10. The block brick layer 9 is laid above the gravel layer 10, the planting soil layer 8 is laid above the block brick layer 9, and the plant layer 7 is planted on the planting soil layer 8. In this embodiment, the plant layer 7 can be selected to plant the common ground cover plant, the four seasons spring, and plants such as Iris pseudacorus that are water-tolerant, waterlogging-tolerant, and drought-tolerant can be planted in the planting soil layer 8. As an aquatic plant, Iris pseudacorus has a good effect of purifying water quality, and rainwater can be effectively absorbed to reduce rainfall runoff.
[0022] Among them, a drain pipe 11 is horizontally installed at the bottom of the gravel layer 10. A plurality of through holes are provided on the upper surface of the drain pipe 11. A water seepage channel 12 is vertically arranged above each through hole. A plurality of water seepage ports 13 are evenly arranged at the bottom of the first V-shaped groove 5 and the bottom of the second V-shaped groove 6, and the water seepage ports 13 are communicated with the water seepage channel 12.
[0023] Working principle:
[0024] After rainfall occurs, by respectively arranging a plurality of first V-shaped grooves 5 and a plurality of second V-shaped grooves 6 on the surfaces of the first slope 3 and the second slope 4, rainwater forms a lateral runoff in the grass-planting ditch along the first V-shaped grooves 5 and the second V-shaped grooves 6. During the process of the runoff passing horizontally through the first slope 3 and the second slope 4, it is intercepted and infiltrated through the water seepage ports 13 at the bottoms of the first V-shaped grooves 5 and the second V-shaped grooves 6, so that rainwater passes through the plant layer 7, the planting soil layer 8, the block brick layer 9, and the gravel layer 10 respectively. During this process, large-particle pollutants carried by the rainwater runoff will be intercepted by the plant leaves and rhizomes of the plant layer 7, and after infiltration, they will be absorbed by the plant roots, adsorbed and filtered by the substrate in the planting soil layer 8, so as to effectively remove other pollutants such as rainwater SS, COD, and TP. The infiltrated water then passes through the block brick layer 9 and the gravel layer 10 in sequence and is discharged through the drain pipe 11. When the rainfall further increases, after the water in the first V-shaped grooves 5 and the second V-shaped grooves 6 is gradually filled, the runoff gradually converges into the middle water storage tank 2 and then infiltrates.
[0025] In the present utility model, by providing the first V-shaped groove 5 and the second V-shaped groove 6, on the one hand, the water load caused by rainfall runoff can be effectively alleviated, and at the same time, the arrival time of the water peak can be slowed down. On the other hand, the problem of soil erosion on the slope surface caused by long-term operation can be prevented. And through the action of the first V-shaped groove 5 and the second V-shaped groove 6, the grassed swale of the present utility model has a larger contact area with precipitation, so that the peak value of rainfall runoff can be more efficiently and powerfully reduced, the runoff can be regulated, and urban waterlogging can be further alleviated. In addition, by providing a water storage tank 2 in the middle, the grassed swale can store water under a certain water transfer condition, and is used to store the initial rainwater.
[0026] Embodiment 2, as a further preferred solution of Embodiment 1, a filter screen is installed on the surface of the water inlet 13. Large impurities in rainwater can be effectively filtered through the filter screen.
[0027] Embodiment 3, as a further preferred solution of Embodiment 1, quartz sand, zeolite and gravel all have the effect of reducing the water volume and pollutants of rainwater runoff, and the combined effect of the three is better.
[0028] Therefore, in this embodiment, the thickness of the gravel layer 10 is 100 mm, the particle size of each gravel in the gravel layer 10 is 4-6 mm, the thickness of the block brick layer 9 is 100 mm, the thickness of the block brick layer 9 is 300 mm, the block brick layer 9 includes quartz sand and natural zeolite, and the quartz sand is laid above the natural zeolite; the particle size of the quartz sand is 1-2 mm, and the particle size of the zeolite is 2-4 mm; the thickness of the planting soil layer is 100 mm. The 100-mm planting soil layer, the 300-mm block brick layer 9 and the 100-mm gravel layer 10 are used as the preferred matrix selection to effectively reduce rainfall runoff.
[0029] Embodiment 4, as a further preferred solution of Embodiment 1, a permeable geotextile is laid between the planting soil layer 8 and the block brick layer 9. The permeable geotextile can prevent soil particles after being infiltrated by moisture from blocking the block brick layer 9, thereby affecting the normal water infiltration and reduction efficiency.
[0030] Embodiment 5, as a further preferred solution of Embodiment 1, the slope of the inclined surface on the side of the first V-shaped groove 5 and the second V-shaped groove 6 away from the water storage tank 2 is 1:1-1:3, and the slope of the inclined surface on the side of the first V-shaped groove 5 and the second V-shaped groove 6 close to the water storage tank 2 is 2:3. Specifically, according to the drainage design standard and the local actual situation, the number of the first V-shaped groove 5 and the second V-shaped groove 6 can be appropriately increased or decreased, and the inclined surface angle of the first V-shaped groove 5 and the second V-shaped groove 6 can be adjusted to achieve the maximum designed water storage capacity, runoff reduction amount and road beauty effect of the grassed swale. In addition, the distance between the middle horizontal surface layer and the bottom drain pipe determines the minimum infiltration height, and the height of each matrix layer can be appropriately increased to improve the infiltration effect.
[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A stepped ecological grassed swale, comprising a trench body (1), a water storage tank (2) is arranged in the middle of the trench body (1), a first slope (3) and a second slope (4) are respectively arranged on both sides of the water storage tank (2), and it is characterized in that: The surface of the first slope (3) is evenly and horizontally provided with a plurality of first V-shaped grooves (5), and the surface of the second slope (4) is evenly and horizontally provided with a plurality of second V-shaped grooves (6). The trench body (1) includes a plant layer (7), a planting soil layer (8), a block brick layer (9) and a gravel layer (10). The block brick layer (9) is laid above the gravel layer (10), the planting soil layer (8) is laid above the block brick layer (9), and the plant layer (7) is planted on the planting soil layer (8).
2. The stepped ecological grass planting ditch according to claim 1, characterized in that: A drain pipe (11) is horizontally installed at the bottom of the gravel layer (10). A plurality of through holes are formed in the upper surface of the drain pipe (11). A water seepage channel (12) is vertically arranged above each through hole. A plurality of water seepage openings (13) are evenly arranged at the bottom of the first V-shaped groove (5) and the bottom of the second V-shaped groove (6). The water seepage openings (13) are communicated with the water seepage channels (12).
3. The stepped ecological grassed swale according to claim 2, characterized in that: A filter screen is installed on the surface of the water seepage opening (13).
4. The stepped ecological grass planting ditch according to claim 1, characterized in that: The thickness of the gravel layer (10) is 100 mm, the particle size of each gravel in the gravel layer (10) is 4-6 mm, the thickness of the block brick layer (9) is 300 mm, the block brick layer (9) includes quartz sand and natural zeolite, and the quartz sand is laid above the natural zeolite; the particle size of the quartz sand is 1-2 mm, and the particle size of the zeolite is 2-4 mm; the thickness of the planting soil layer is 100 mm.
5. The stepped ecological grassed swale according to claim 1, wherein: A permeable geotextile is laid between the planting soil layer (8) and the block brick layer (9).
6. The stepped ecological grass planting ditch according to claim 1, characterized in that: The slope of the inclined surface on the side of the first V-shaped groove (5) and the second V-shaped groove (6) away from the water storage tank (2) is 1:1-1:3, and the slope of the inclined surface on the side of the first V-shaped groove (5) and the second V-shaped groove (6) close to the water storage tank (2) is 2:3.