Rainwater infiltration and storage structure
Patent Information
- Application Number
- CN202522462220.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-20
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-20
AI Technical Summary
传统海绵设施（生物滞留池、渗透塘等）普遍存在景观割裂、维护复杂、造价高或调蓄效率低等缺陷，难以在既有建成区大规模推广，因此，亟需一种对地上景观影响小、施工简便、造价低且能同时“延长下渗时间、提高下渗速率”的分散式调蓄设施
[0014]与现有技术相比，本实用新型所达到的有益效果：本实用新型提供的雨水下渗调蓄结构，采用间隔设置的沉砂井和取水井，以及相连通的储水沟和蓄水层，构成一个用于雨水尘沙、储水、蓄水下渗结构设施，利用地下设置蓄水层，一侧或两侧设置蓄水层，可以灵活调节蓄水量，增加雨水下渗时间和速度的方式达到了海绵城建设中减少雨水排放和清除雨水污染物的要求；并通过取水井、溢水管等达到溢流安全排放目的，实现灵活调节储水蓄水量，施工简便、造价低、延长下渗时间、提高下渗速率；
Smart Images
Figure CN224833932U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of municipal engineering technology, specifically relating to a rainwater infiltration and storage structure. Background Technology
[0002] The construction of sponge cities focuses on rainwater control and utilization, making the promotion and research of construction measures and methods crucial. The area of permeable green spaces and natural water bodies is continuously shrinking, while the proportion of hard paving such as plazas and roads is significantly increasing. The large number of hard plazas and paved roads increases the burden on municipal drainage systems and greatly weakens rainwater infiltration capacity. Traditional sponge city facilities (bioretention ponds, infiltration ponds, etc.) generally suffer from drawbacks such as landscape disruption, complex maintenance, high cost, or low storage efficiency, making large-scale promotion in existing built-up areas difficult. Therefore, there is an urgent need for a decentralized storage facility that minimizes impact on the landscape, is easy to construct, has low cost, and can simultaneously "extend infiltration time and increase infiltration rate." Utility Model Content
[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a rainwater infiltration and storage structure that realizes rainwater infiltration and storage, with a clever structure and simple construction.
[0004] To achieve the above objectives, this utility model employs the following technical solution: This utility model provides a rainwater infiltration and storage structure, including a sedimentation well and a water intake well arranged at intervals. The sedimentation well is provided with a rainwater inlet pipe, and the water intake well is provided with an overflow pipe. A long strip-shaped water storage ditch is transversely connected between the sedimentation well and the water intake well. At least one water storage layer is provided on one or both sides of the water storage ditch and is connected by several permeable blind pipes.
[0005] Furthermore, the sedimentation well and the water intake well are each equipped with a well cover; the water storage ditch is equipped with a cover plate.
[0006] Furthermore, the sedimentation well, water intake well, water storage ditch, and water storage layer are all covered with a layer of vegetated soil.
[0007] Furthermore, the water storage layer is filled with crushed concrete, crushed bricks or crushed stone, and a layer of filter geotextile is placed between the water storage layer and the vegetation soil layer.
[0008] Furthermore, the sedimentation well is connected to the water storage ditch via an HDPE outlet pipe, and the bottom elevation of the pipe is at least 100 mm lower than the top surface of the water storage ditch.
[0009] Furthermore, the sedimentation well is equipped with a liftable sedimentation basket, the top of which is at least 100 mm lower than the bottom of the inlet pipe and the bottom of which is at least 300 mm lower than the bottom of the HDPE outlet pipe.
[0010] Furthermore, at least two permeable blind pipes are arranged in parallel at intervals in the water storage layer, and the distance between the permeable blind pipes is no more than 2500mm.
[0011] Furthermore, the tops of the covers of the sedimentation well and the water intake well are flush with the top surface of the surrounding vegetation soil layer.
[0012] Furthermore, the sedimentation well and the water intake well are precast concrete structures or finished plastic structures.
[0013] Furthermore, the top surface of the water storage ditch is flush with the top surface of the water storage layer, and both the top surface of the water storage ditch and the top surface of the water storage layer are lower than the top surfaces of the sedimentation well and the water intake well.
[0014] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: The rainwater infiltration and storage structure provided by this utility model adopts spaced sedimentation wells and water intake wells, as well as interconnected water storage ditches and water storage layers, to form a structure and facility for rainwater sediment, water storage, and infiltration. By utilizing underground water storage layers, with water storage layers set on one or both sides, the water storage capacity can be flexibly adjusted, and the method of increasing rainwater infiltration time and speed meets the requirements of reducing rainwater discharge and removing rainwater pollutants in sponge city construction; and the overflow safety discharge purpose is achieved through water intake wells, overflow pipes, etc., realizing flexible adjustment of water storage capacity, simple construction, low cost, extended infiltration time, and improved infiltration rate; In addition, all components of the entire structure are buried under the vegetation or green space, there are no open water bodies on the ground, and the landscaping can be pruned and compacted normally, achieving "zero landscape conflict". Attached Figure Description
[0015] Figure 1 This is a plan view of a rainwater infiltration and storage structure provided according to an embodiment of the present utility model.
[0016] Figure 2 yes Figure 1 Sectional view of AA.
[0017] Figure 3 yes Figure 1 BB section view.
[0018] Figure 4 yes Figure 1 CC section view.
[0019] In the diagram: 1. Sedimentation well; 2. Inlet pipe; 3. Water storage ditch; 4. Water intake well; 5. Overflow pipe; 6. Water storage layer; 7. Permeable blind pipe; 8. Well cover; 9. Cover plate; 10. Filter geotextile; 11. Vegetation soil layer; 12. Green space drainage blind pipe. Detailed Implementation
[0020] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.
[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0023] like Figures 1-4 As shown in the figure, this utility model embodiment provides a rainwater infiltration and storage structure, including a sedimentation well 1 and a water intake well 4 arranged at intervals. The sedimentation well 1 is provided with a rainwater inlet pipe 2, and the water intake well 4 is provided with an overflow pipe. A long strip-shaped water storage ditch 3 is transversely connected between the sedimentation well 1 and the water intake well 4. At least one water storage layer 6 is provided on one or both sides of the water storage ditch 3 and is connected by several permeable blind pipes 7.
[0024] Each of the sedimentation well 1 and the water intake well 4 is equipped with a well cover 8; the water storage ditch 3 is equipped with a cover plate 9. The top of the well cover 8 of the sedimentation well 1 and the water intake well 4 is flush with the top surface of the surrounding vegetation soil layer 11.
[0025] The top surface of the water storage ditch 3 is flush with the top surface of the water storage layer 6, and both the top surface of the water storage ditch 3 and the top surface of the water storage layer 6 are lower than the top surfaces of the sedimentation well 1 and the water intake well 4.
[0026] The sedimentation well 1, water intake well 4, water storage ditch 3 and water storage layer 6 are all covered with a vegetated soil layer 11.
[0027] The water storage layer 6 is filled with crushed concrete, crushed bricks or crushed stones, and a layer of filter geotextile 10 is placed between the water storage layer 6 and the vegetation soil layer 11.
[0028] The aforementioned sedimentation well 1, water intake well 4, water storage ditch 3, and water storage layer 6 are all buried below the vegetation soil layer 11 or green space. There are no open water bodies on the ground, and the landscape greening can be pruned and compacted normally, achieving "zero landscape conflict".
[0029] In this embodiment, the sedimentation well 1, water intake well 4, water storage ditch 3 and water storage layer 6 can all adopt a modular structure, and can be assembled with each other to form an integral infiltration and storage structure, thereby realizing a modular structure and facilitating construction.
[0030] Among them, the sedimentation well 1, water intake well 4, water storage ditch 3 and water storage layer 6 can adopt a rectangular structure, a cylindrical structure, or other regular or irregular shapes.
[0031] The walls of the sedimentation well and the water intake well 4 are made of precast concrete or finished plastic inspection wells, and the top is equipped with an anti-theft stainless steel well cover 8 that is flush with the surrounding green space.
[0032] A liftable sedimentation basket is installed in the middle of the sedimentation well. The top of the basket is ≥100 mm lower than the bottom of the inlet pipe, and the bottom of the basket is ≥300 mm lower than the bottom of the outlet pipe.
[0033] An overflow outlet is provided on the upper part of the well wall of water intake well 4. The overflow outlet elevation is equal to the design storage water level + 50 mm safety freeboard. It is connected to the nearest municipal stormwater inspection well via a DN200 HDPE pipe. In some specific embodiments, a green space drainage blind pipe 12 is also connected to the well wall of water intake well 4.
[0034] In addition, rainwater from the hard pavement flows into the sedimentation well through the inlet pipe 2 under the action of gravity.
[0035] Water from the sedimentation well enters the water storage ditch 3 (or module box) from the lower part of the well wall through an HDPE pipe. The bottom elevation of the pipe can be ≥100 mm lower than the top surface of the water storage ditch 3 (or module box) to form a submerged flow and increase the inlet pressure.
[0036] Rainwater in the water storage ditch 3 (or modular box) seeps evenly through the side walls and bottom plate.
[0037] When rainfall exceeds the designed storage capacity, the water level rises to the overflow outlet and is directly discharged into the municipal pipe network through overflow pipe 5 to prevent water accumulation in green areas.
[0038] Within the water storage layer 6, rainwater has sufficient time to infiltrate, thereby increasing the infiltration volume and reducing rainwater discharge.
[0039] The size and depth of the water storage layer 6 can be adjusted according to the amount of rainwater the sponge needs, which is flexible and convenient and has almost no impact on the landscape environment. In the event of heavy short-term rainfall, excess rainwater can also be drained through the overflow pipe 5 to prevent water accumulation on the site.
[0040] At least two permeable blind pipes 7 are arranged in parallel at intervals in the water storage layer 6, and the distance between the permeable blind pipes 7 is no more than 2500mm.
[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A rainwater infiltration and storage structure, characterized in that, It includes a sedimentation well and a water intake well arranged at intervals. The sedimentation well is equipped with a rainwater inlet pipe, and the water intake well is equipped with an overflow pipe. A long strip-shaped water storage ditch is horizontally connected between the sedimentation well and the water intake well. At least one water storage layer is provided on one or both sides of the water storage ditch and connected by several permeable blind pipes.
2. The rainwater infiltration and storage structure according to claim 1, characterized in that, The sedimentation well and the water intake well are each equipped with a well cover; the water storage ditch is equipped with a cover plate.
3. The rainwater infiltration and storage structure according to claim 1, characterized in that, The sedimentation well, water intake well, water storage ditch, and water storage layer are all covered with a layer of vegetated soil.
4. The rainwater infiltration and storage structure according to claim 1, characterized in that, The water storage layer is filled with crushed concrete, crushed bricks or crushed stones, and a layer of filter geotextile is placed between the water storage layer and the vegetation soil layer.
5. The rainwater infiltration and storage structure according to claim 1, characterized in that, The sedimentation well is connected to the water storage ditch via an HDPE outlet pipe, and the bottom elevation of the pipe is at least 100 mm lower than the top surface of the water storage ditch.
6. The rainwater infiltration and storage structure according to claim 5, characterized in that, The sedimentation well is equipped with a liftable sedimentation basket. The top of the sedimentation basket is at least 100 mm lower than the bottom of the inlet pipe, and the bottom of the basket is at least 300 mm lower than the bottom of the HDPE outlet pipe.
7. The rainwater infiltration and storage structure according to claim 1, characterized in that, At least two permeable blind pipes are arranged in parallel at intervals in the water storage layer, and the distance between the permeable blind pipes is no more than 2500mm.
8. The rainwater infiltration and storage structure according to claim 2, characterized in that, The tops of the covers of the sedimentation well and the water intake well are flush with the top surface of the surrounding vegetation soil layer.
9. The rainwater infiltration and storage structure according to claim 1, characterized in that, The sedimentation well and water intake well are precast concrete structures or finished plastic structures.
10. The rainwater infiltration and storage structure according to claim 1, characterized in that, The top surface of the water storage ditch is flush with the top surface of the water storage layer, and both the top surface of the water storage ditch and the top surface of the water storage layer are lower than the top surfaces of the sedimentation well and the water intake well.