Bioretention pond
By using materials such as permeable geotextiles and ecological porous fiber cotton in the biological retention pond, combined with the design of overflow well rainwater outlets, the problems of high cost and difficult construction in the existing technology of biological retention pond facilities are solved, and the cost is low and Convenient construction effect.
Patent Information
- Application Number
- CN202420931642.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The existing biological retention pool facilities are costly and difficult to construct in road projects with smaller widths, especially the layout of reinforced concrete box blocking pipelines, and the cross-implementation is inconvenient.
The rectangular trough box is used, the short trough wall is permeable geotextile, the cover layer is planted soil, ecological porous fiber cotton and gravel layers, the overflow well rainwater outlet is connected to the rainwater pipe through the pipeline, and the permeable geotextile is used for the construction pipeline to pass through. Through-hole design, replacing traditional reinforced concrete and embedded hole solutions.
It reduces the overall cost of biological retention ponds, simplifies pipeline construction, improves the application rate on road projects with smaller widths, and solves the problems of facility cost and construction difficulty.
Smart Images
Figure CN222295236U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sponge city facilities, in particular to a biological retention pond. Background Art
[0002] A sponge city refers to an urban development model that strengthens urban planning, construction and management, gives full play to the absorption, storage and slow-release functions of rainwater by buildings, roads, green spaces, water systems and other ecological systems, relies on natural forces, disperses sources, drains slowly and releases rainwater, collects, stores, infiltrates and purifies rainwater nearby, and allows the city to breathe comfortably like an ecological sponge, thereby achieving the natural migration of rainwater in the city.
[0003] Bioretention facilities are a common treatment facility in the sponge city profession. Their main function is to absorb rainfall, store peak flow, infiltrate to replenish soil moisture and filter and purify rainwater on the road surface. The facility is mainly composed of a cover layer, a replacement soil layer, a crushed stone layer, a drainage blind pipe, a gravel layer and a reinforced concrete box. The overall cross-section is rectangular and the water storage capacity is 0.25-0.3m 3 / m 2 Compared with the rainwater flowerbed with trapezoidal cross section (0.15-0.2m 3 / m 2 ) has a larger water storage volume and is a common sponge facility in municipal road sponge cities.
[0004] For example, the existing technology in the General Atlas of Sponge City Facilities (Su S57-2020) on page 22 shows a bioretention pond, which includes a box, a gravel layer, a drainage pipe, a replacement filler, a cover layer and an overflow well. During the specific implementation process, we found that the facility still has some limitations:
[0005] 1. The box body has the function of resisting lateral soil pressure and blocking the mixing of ordinary soil and special replacement soil, but the overall cost of the concrete box body is high, which will increase the overall cost of the sponge city project and is unreasonable in terms of economy.
[0006] 2. For some road projects with smaller widths, lighting pipelines or signal light pipelines need to be arranged in the green belts. The setting of reinforced concrete boxes will block the layout of the pipelines. If holes are pre-drilled in the box, it will increase the difficulty of pipeline construction and the operability will be unreasonable.
[0007] The cost of this facility is relatively high, which will increase the overall investment of the project. At the same time, the cross-implementation and connection issues between the sponge city profession and the roads, pipelines and other professions in the project have not been well resolved. Utility Model Content
[0008] In order to solve the above problems, the utility model provides a biological retention pond which has low cost, does not require pre-opening of holes in the box body, and is easy for pipeline construction.
[0009] The utility model provides a biological retention pond, comprising a box body, wherein the box body is a rectangular trough body, the rectangular trough body is surrounded by a reinforced concrete bottom plate, a pair of long trough walls arranged oppositely and a pair of short trough walls arranged oppositely, the long trough wall is a reinforced concrete retaining wall, the short trough wall is a permeable geotextile, a crushed stone layer, an ecological porous fiber cotton and a covering layer are arranged in sequence from bottom to top in the rectangular trough body, plants are planted in the covering layer, a rainwater pipe is pre-buried at the bottom of the reinforced concrete retaining wall, an overflow well is arranged in the middle of the box body, the rainwater outlet of the overflow well is communicated with the rainwater pipe through a pipeline, and the permeable geotextile is provided with a through hole for the construction pipeline to pass through near the bottom end of the reinforced concrete bottom plate.
[0010] Furthermore, the covering layer is planting soil, the planting soil has a permeability of not less than 36 mm / h, an organic matter content of 1.2% to 8%, a pH value of 6 to 8, and a cation exchange capacity of greater than 5 meq / 100 g.
[0011] Furthermore, the crushed stone layer is composed of gravel with a particle size of 15mm to 20mm.
[0012] Furthermore, the rainwater outlet on the overflow well is a flat single-grating rainwater outlet.
[0013] Furthermore, the thickness of the covering layer is not less than 30 cm, the thickness of the covering layer near the center of the rectangular trough body is lower than the thickness of the covering layer near the wall of the rectangular trough body, and the thickness of the covering layer near the center of the rectangular trough body smoothly transitions to the thickness of the covering layer near the wall of the rectangular trough body.
[0014] Furthermore, the thickness of the ecological porous fiber cotton is 50 cm.
[0015] Furthermore, the thickness of the gravel layer is 20 cm.
[0016] Furthermore, a sign is inserted into the cover layer for safety warning or publicity.
[0017] Furthermore, the periphery of the ecological porous fiber cotton is coated with a permeable geotextile.
[0018] Beneficial effects:
[0019] 1. The short slot wall of the box in the utility model adopts permeable geotextile, which replaces the traditional reinforced concrete and reduces the overall cost of the biological retention pond. The relatively short slot wall adopts permeable geotextile, and the permeable geotextile near the bottom end of the reinforced concrete bottom plate is provided with a through hole for the construction pipeline to pass through. The construction pipeline can pass directly through the through hole, replacing the traditional solution of pre-buried holes in reinforced concrete, reducing the cost, and the position of the through hole can be opened on the permeable geotextile after measuring the position on site according to the actual situation. The opening method can be cutting, which makes it easier to open holes and arrange pipelines, reducing the difficulty of pipeline construction.
[0020] 2. In the utility model, the ecological porous fiber cotton in the box replaces the original filling materials of 40% coarse sand, 40% planting soil and 20% coconut bran, which reduces the lateral pressure on the box. In this way, the permeable geotextile can also withstand the lateral pressure generated by the ecological porous fiber cotton, so that the groove wall on the short side of the box does not have to be made of reinforced concrete material, thereby reducing the overall cost of the biological retention pond.
[0021] 3. In some road projects with smaller widths, lighting pipelines or signal light pipelines need to be arranged in the green belts. The reinforced concrete box will block the layout of the pipelines. The permeable geotextile trough wall relatively set up in the bioretention pool is convenient for pipeline construction by cutting through holes for pipelines to pass through, thereby increasing the application rate of bioretention pools in road projects with smaller widths.
[0022] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent.
[0023] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned from the practice of the specific embodiments according to the teachings of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The accompanying drawings are not drawn to scale according to actual reference objects. In the accompanying drawings, each identical or approximately identical component shown in each figure may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the utility model will be described by way of example and with reference to the accompanying drawings, in which:
[0025] Figure 1 This is a top view of the biological retention pond of the utility model.
[0026] Figure 2 for Figure 1Cross-section view at AA in the middle.
[0027] Figure 3 for Figure 1 Cross-section view at the middle BB.
[0028] Description of Figure Numbers:
[0029] 1-reinforced concrete retaining wall; 2-reinforced concrete bottom plate; 3-rainwater pipe; 4-covering layer; 5-ecological porous fiber cotton; 6-gravel layer; 7-through hole; 8-overflow well; 9-permeable geotextile; 10-signboard DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.
[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0033] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.
[0034] like Figures 1 to 3 As shown, an embodiment of the utility model provides a biological retention pond, including a box body, wherein the box body is a rectangular trough body, and the rectangular trough body is surrounded by a reinforced concrete bottom plate 2, a pair of long trough walls arranged oppositely, and a pair of short trough walls arranged oppositely, the long trough wall is a reinforced concrete retaining wall 1, and the short trough wall is a permeable geotextile. A crushed stone layer 6, an ecological porous fiber cotton and a covering layer 4 are arranged in sequence from bottom to top in the rectangular trough body, and plants are planted in the covering layer 4. A rainwater pipe 3 is pre-buried at the bottom of the reinforced concrete retaining wall 1, and an overflow well 8 is arranged in the middle of the box body. The rainwater outlet of the overflow well 8 is communicated with the rainwater pipe 3 through a pipe, and the permeable geotextile 9 is provided with a through hole 7 for the construction pipe to pass through near the bottom of the reinforced concrete bottom plate 2.
[0035] In some embodiments of the utility model, the permeable geotextile 9 is used as the reinforced concrete enclosure of the short trough wall and the long trough wall in such a way that the side of the permeable geotextile is fixed to the wall surface of the reinforced concrete retaining wall 1 or the permeable geotextile is wrapped around the outside of a pair of relatively arranged reinforced concrete retaining walls 1, and the width between the pair of relatively arranged reinforced concrete retaining walls 1 is the width of the permeable geotextile.
[0036] Replacing the short trench wall with a permeable geotextile reduces the overall cost and meets the convenience of construction pipelines. It can also support the lateral pressure of the filler and prevent the filler in the box from collapsing.
[0037] The short slot wall of the box body adopts permeable geotextile, which replaces the traditional reinforced concrete, and reduces the overall cost of the bioretention pond. The relatively short slot wall adopts permeable geotextile, and the permeable geotextile 9 near the bottom end of the reinforced concrete bottom plate 2 is provided with a through hole 7 for the construction pipeline to pass through. The construction pipeline can pass directly through the through hole 7, replacing the traditional solution of pre-buried holes in reinforced concrete, reducing the cost, and the position of the through hole 7 can be opened on the permeable geotextile after measuring the position on site according to the actual situation, and the opening method can be cutting, which makes it easier to open holes and arrange pipelines, reducing the difficulty of pipeline construction.
[0038] In some embodiments of the utility model, the covering layer 4 is planting soil, and the planting soil is preferably original soil. The original soil must meet the requirements of a permeability rate of not less than 36 mm / h, an organic matter content of 1.2% to 8%, a pH value of 6 to 8, and a cation exchange capacity greater than 5 meq / 100 g, otherwise the soil should be replaced.
[0039] In some embodiments of the present invention, the crushed stone layer 6 is composed of gravel with a particle size of 15 mm to 20 mm.
[0040] In some embodiments of the utility model, the rainwater inlet on the overflow well 8 is a flat single-grid rainwater inlet. The overflow well 8 is a brick structure, and the rectangular well body refers to the flat single-grid rainwater inlet in "Municipal Drainage Pipe Engineering and Ancillary Facilities" 06MS201-8. The overflow cover is a finished product, made of cast iron material, and should comply with the requirements of "Cast Iron Inspection Manhole Cover" CJ / T 3012, and meet the strength requirements of light manhole covers.
[0041] In some embodiments of the utility model, the thickness of the covering layer 4 is not less than 30 cm, the thickness of the covering layer 4 near the center of the rectangular trough is lower than the thickness of the covering layer 4 near the wall of the rectangular trough, and the thickness of the covering layer 4 near the center of the rectangular trough smoothly transitions to the thickness of the covering layer 4 near the wall of the rectangular trough. The thickness of the covering layer 4 is designed to facilitate rainwater to gather toward the middle of the box, so as to better flow into the overflow well 8, flow into the pipeline through the rainwater outlet, and enter the rainwater pipe 3 for discharge.
[0042] In some embodiments of the present invention, the ecological porous fiber cotton 5 has a thickness of 50 cm.
[0043] In some embodiments of the present invention, the crushed stone layer 6 has a thickness of 20 cm.
[0044] In some embodiments of the present invention, a sign 10 is inserted into the cover layer 4 for safety warning or publicity.
[0045] In some embodiments of the utility model, the ecological porous fiber cotton 5 is composed of a plurality of ecological porous fiber cotton units, each of which has a length, width and height of 1200×300×400mm, a porosity of 93-97%, a water permeability coefficient ≥0.6cm / s, a compression strength ≥48Kpa, a slag ball content ≤5%, an organic matter content ≤5%, lead ≤2.9mg / kg, cadmium ≤1mg / kg, arsenic ≤1mg / kg, and chromium ≤99mg / kg.
[0046] The thickness of the gravel layer 6, the ecological porous fiber cotton and the covering layer 4 in the embodiment of the utility model can effectively meet the requirements of rapid water seepage and strong decontamination ability.
[0047] In some embodiments of the present invention, the ecological porous fiber cotton 5 is coated with a permeable geotextile. The permeable geotextile 9 wraps a plurality of ecological porous fiber cotton units into a whole so that they are not easily scattered and has good water permeability.
[0048] The working principle of the utility model is as follows: rainwater falls into the biological retention pool, and is purified by the covering layer 4, the ecological porous fiber cotton 5 and the gravel layer 6 in sequence. When the rainfall is too heavy, the penetration speed of rainwater in the soil is less than the inflow speed of rainwater, and the rainwater accumulates on the surface of the covering layer 4. Since the overflow well 8 is arranged in the middle of the box, and the covering layer 4 is high on both sides and low in the middle, the rainwater is easily collected in the overflow well 8, and is discharged from the rainwater outlet of the overflow well 8 into the pipeline from the rainwater pipe 3. In some road projects with a smaller width, in addition to arranging the rainwater pipe 3, there will also be lighting pipelines or signal light pipelines that need to be arranged in the green belt, and the reinforced concrete box will block the arrangement of the pipeline. The permeable geotextile groove wall relatively arranged in the biological retention pool is cut through the through hole 7 for the pipeline to pass through, which is conducive to the construction of the pipeline, and the application rate of the biological retention pool in road projects with a smaller width is improved, and it can be effectively applied to the urban green belt scene. Landscape plants that are adapted to the scenery of the urban green belt can be planted in the covering layer 4 in the embodiment of the utility model.
[0049] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.
Claims
1. A biological retention pond, comprising a housing, characterized in that: The box body is a rectangular trough body, which is surrounded by a reinforced concrete bottom plate, a pair of long trough walls arranged oppositely and a pair of short trough walls arranged oppositely. The long trough wall is a reinforced concrete retaining wall, and the short trough wall is a permeable geotextile. A crushed stone layer, an ecological porous fiber cotton and a covering layer are arranged in sequence from bottom to top in the rectangular trough body, and plants are planted in the covering layer. A rainwater pipe is pre-buried at the bottom of the reinforced concrete retaining wall, and an overflow well is arranged in the middle of the box body. The rainwater outlet of the overflow well is connected with the rainwater pipe through a pipe, and the permeable geotextile is provided with a through hole for the construction pipe to pass through near the bottom of the reinforced concrete bottom plate.
2. The bioretention pond according to claim 1, characterized in that: The covering layer is planting soil, the planting soil has a permeability of not less than 36 mm / h, an organic matter content of 1.2% to 8%, a pH value of 6 to 8, and a cation exchange capacity of greater than 5 meq / 100 g.
3. The bioretention pond according to claim 1, characterized in that: The crushed stone layer is composed of gravel with a particle size of 15 mm to 20 mm.
4. The bioretention pond according to claim 1, characterized in that: The rainwater outlet on the overflow well is a flat single-grating rainwater outlet.
5. The bioretention pond according to claim 1, characterized in that: The thickness of the covering layer is not less than 30 cm, the thickness of the covering layer near the center of the rectangular trough body is lower than the thickness of the covering layer near the wall of the rectangular trough body, and the thickness of the covering layer near the center of the rectangular trough body smoothly transitions to the thickness of the covering layer near the wall of the rectangular trough body.
6. The bioretention pond according to claim 1, characterized in that: The thickness of the ecological porous fiber cotton is 50 cm.
7. The bioretention pond according to claim 1, characterized in that: The thickness of the gravel layer is 20 cm.
8. The bioretention pond according to claim 1, characterized in that: A sign is also inserted into the covering layer for safety warning or publicity.
9. The bioretention pond according to claim 1, characterized in that: The periphery of the ecological porous fiber cotton is covered with a permeable geotextile.