Composite catch basin drainage system based on permeable asphalt concrete

Abstract

The utility model relates to the technical field of urban road drainage, in particular to a composite catch basin drainage system based on permeable asphalt concrete. The drainage system comprises an asphalt concrete surface layer (8), a base layer (9) is arranged below the asphalt concrete surface layer (8), a subbase layer (10) is arranged below the base layer (9), and rainwater branch pipes (6) are arranged below the subbase layer (10); a prefabricated concrete catch basin main body (2) is arranged on the road, and a plurality of groups of circular drainage holes (3) are formed in the prefabricated concrete catch basin main body (2); a permeable asphalt concrete layer (1) is arranged above the precast concrete catch basin main body (2); a water collecting cavity (4) is arranged below the prefabricated concrete catch basin main body (2); the water collecting cavity (4) is connected with a rainwater branch pipe (6); and a C15 concrete cushion layer (5) is arranged below the water collecting cavity (4).

Description

Technical Field

[0001] This utility model relates to the field of urban road drainage technology, and in particular to a composite rainwater well drainage system based on permeable asphalt concrete. Background Technology

[0002] Currently, the most common drainage system used on municipal roads is the roadside storm drain grates. Rainwater flows smoothly into storm drains through the drainage holes in these grates, and then into the main storm drain system via branch pipes. However, during street cleaning, sanitation workers may inadvertently sweep garbage through the storm drain grates into the storm drains. Additionally, some shops may dump various mixed wastes into the storm drains, or roadside trash such as leaves and plastic bags may flow into the storm drains with the rainwater. This situation, especially during heavy rain, can lead to poor drainage, excessive water accumulation on the road, and even flooding of the road surface. This severely impacts the normal passage of pedestrians and vehicles, and may even cause accidents.

[0003] Traditional storm drain grates or storm drain rings are prone to breakage and damage under the long-term pressure of vehicles, which not only affects the aesthetics of the road but may also pose a safety hazard to pedestrians.

[0004] Traditional rainwater well construction requires multiple steps, most of which rely on manual labor. This makes it difficult to effectively control the quality and progress of the construction, thus affecting the efficiency and quality of the entire project.

[0005] The presence of storm drain walls can, to some extent, block the drainage channels on the sides of the asphalt pavement structure, making it difficult for rainwater to drain from the pavement. This not only affects the service life of the asphalt pavement structure but can also lead to pavement damage, requiring frequent repairs and replacements.

[0006] On April 21, 2025, a search was conducted in the China Patent Publication Database using "permeable and composite and rainwater well and branch pipe and cavity and asphalt and concrete" as the abstract keywords and with the option to allow synonym expansion. No relevant literature was found.

[0007] On April 21, 2025, an abstract search was conducted on CNKI (China National Knowledge Infrastructure) for the keywords "permeable and composite and rainwater well and branch pipe and cavity and asphalt and concrete", but no relevant literature was found.

[0008] On April 21, 2025, a search was conducted on the website of the United States Patent and Trademark Office for the term "Pervious with Composite with Stormwater withinspection with well with Branch pipe with Cavity with Asphalt with matrix with Concrete", but no relevant literature was found; the search URL is https: / / ppubs.uspto.gov / pubwebapp / .

[0009] On April 21, 2025, a search was conducted on WIPO's website https: / / patentscope2.wipo.int / with the search term "Pervious and Composite and Stormwater and inspection and well and Branch pipe and Cavity and Asphalt and matrix and Concrete", but no relevant literature was found.

[0010] On April 21, 2025, a search was conducted on the website of the Japan Patent Office (https: / / www.jplatpat.inpit.go.jp / ) for the term "Pervious and Composite and Stormwater and inspection and well and Branch pipe and Cavity and Asphalt and matrix and Concrete", but no relevant literature was found.

[0011] It is completely different from the concept of this patent. Utility Model Content

[0012] The purpose of this utility model is to provide a more effective composite rainwater well drainage system based on permeable asphalt concrete. The specific purpose is explained in the several substantial technical effects in the specific implementation section.

[0013] To achieve the above objectives, the present invention adopts the following technical solution:

[0014] A composite rainwater well drainage system based on permeable asphalt concrete, characterized in that,

[0015] The drainage system includes an asphalt concrete surface layer 8, a base layer 9 below the asphalt concrete surface layer 8, a subbase layer 10 below the base layer 9, and a rainwater branch pipe 6 below the subbase layer 10.

[0016] A precast concrete rainwater well body 2 is arranged on the road, and multiple sets of circular drainage holes 3 are arranged on the precast concrete rainwater well body 2; a permeable asphalt concrete layer 1 is arranged above the precast concrete rainwater well body 2.

[0017] A water collection cavity 4 is arranged below the main body 2 of the precast concrete rainwater well;

[0018] The water collection chamber 4 is connected to the rainwater branch pipe 6;

[0019] A C15 concrete pad 5 is arranged below the water collection cavity 4.

[0020] A further technical solution of this utility model is that the main body 2 of the rainwater well is a precast concrete well.

[0021] A further technical solution of this utility model is that the precast concrete water well is made of high-strength concrete, the precast concrete water well is made of C30 fine stone concrete, and the precast concrete water well has built-in FRP reinforcing bars.

[0022] A further technical solution of this utility model is that the rainwater branch pipe 6 is made of DN200 or DN300 HDPE pipe and the interface between it and the precast concrete water well body is fixed by EPDM rubber sealing ring and pre-embedded stainless steel clamp.

[0023] A further technical solution of this utility model is that the slope of the rainwater branch pipe is ≥1%, which can ensure that rainwater quickly flows into the underground pipe network main pipe.

[0024] A further technical solution of this utility model is that the precast concrete rainwater well body 2 is located in the foundation trench, the bottom of the foundation trench is compacted to a compaction degree of ≥95%, and a 10cm thick C15 concrete cushion layer is laid with a surface flatness error of ≤5mm.

[0025] The precast concrete rainwater well body 2 and the C15 concrete cushion layer are filled with M10 cement mortar to ensure compaction.

[0026] The present invention, employing the above technical solution, has the following advantages over existing technologies: it is suitable for urban road surface drainage. It solves the problems of traditional rainwater wells, such as numerous construction procedures, easy clogging, low drainage efficiency, easy breeding of mosquitoes in summer, and unpleasant odor at the well opening. Simultaneously, it effectively drains accumulated water from inside the road surface structure, extending the service life of the road surface structure. Attached Figure Description

[0027] To further illustrate the present invention, the following description is provided in conjunction with the accompanying drawings:

[0028] Figure 1 Cross-sectional view of a composite rainwater well;

[0029] Figure 2Detailed plan of rainwater well drainage holes;

[0030] Figure 3 Detailed vertical structure drawing of rainwater well;

[0031] The components are: 1. Permeable asphalt concrete layer; 2. Precast concrete rainwater well body; 3. Circular drainage hole; 4. Water collection cavity; 5. C15 concrete subbase; 6. Rainwater branch pipe; 7. Curbstone; 8. Asphalt concrete surface layer; 9. Base layer; 10. Subbase layer. Detailed Implementation

[0032] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention 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. Therefore, they should not be construed as limitations on the present invention. In addition, unless otherwise expressly 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; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] This patent provides multiple parallel solutions; the different descriptions represent improved solutions or parallel solutions based on the basic solution. Each solution has its own unique characteristics. Furthermore, the technical features involved in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other. Fixing methods not described herein can be any type of fixing, such as threaded fixing, bolt fixing, or adhesive bonding.

[0035] Example 1: Combining Figure 1 and Figure 2 A composite rainwater well drainage system based on permeable asphalt concrete, characterized in that:

[0036] The drainage system includes an asphalt concrete surface layer 8, a base layer 9 below the asphalt concrete surface layer 8, a subbase layer 10 below the base layer 9, and a rainwater branch pipe 6 below the subbase layer 10.

[0037] A precast concrete rainwater well body 2 is arranged on the road, and multiple sets of circular drainage holes 3 are arranged on the precast concrete rainwater well body 2; a permeable asphalt concrete layer 1 is arranged above the precast concrete rainwater well body 2.

[0038] A water collection cavity 4 is arranged below the main body 2 of the precast concrete rainwater well;

[0039] The water collection chamber 4 is connected to the rainwater branch pipe 6;

[0040] A C15 concrete pad layer 5 is arranged below the water collection cavity 4. The substantive technical effect and implementation process of this technical solution, i.e., its basic function, are as follows:

[0041] A new type of storm drain system replaces traditional storm drain grates with a precast layer of large-diameter permeable asphalt concrete on top. The top is aligned with the road surface design elevation. The lower part is a precast storm drain body made of fine aggregate concrete. The storm drain body has multiple 5cm diameter circular drainage holes vertically, and a cavity at the bottom connects to storm drain branch pipes. Horizontal storm drain branch pipes discharge rainwater into the main storm drain pipe. During construction, a 10cm C15 concrete base layer is laid at the bottom of the storm drain body. Curbs are installed normally on the side facing the sidewalk. After construction, the road surface structure is then constructed.

[0042] The composite rainwater well has a width of 500mm and a length that is adjusted according to the road width and rainfall, but not less than 700mm.

[0043] The permeable asphalt concrete adopts a large-particle aggregate structure with a thickness of 15-20cm. It uses a discontinuous gradation design (nominal particle size 26.5mm), a porosity of 22-25%, and a permeability coefficient of 2.0×10-2cm / s, meeting the requirements of Type I standard of the "Technical Specification for Permeable Asphalt Pavement" (CJJ / T 190-2020). It is prefabricated to size in the factory and connected to the concrete manhole on site.

[0044] The well body is precast with high-strength concrete: C30 fine aggregate concrete (compressive strength ≥35MPa) with built-in FRP reinforcement. Steam curing is used (constant temperature 60℃, humidity ≥95%, duration 8h), and a concrete sealant is sprayed after demolding.

[0045] Rainwater branch pipes: DN200 or DN300 HDPE pipes are used, with EPDM rubber sealing rings at the interface with the manhole body, and stainless steel clamps are pre-embedded for fixation. The slope is ≥1% to ensure that rainwater quickly flows into the underground main pipe network.

[0046] The well body is vertically equipped with multiple circular drainage holes with a diameter of 5cm, spaced 100-150mm apart, arranged in a quincunx pattern.

[0047] Example 2: As a further improvement, parallel, or optional independent solution, the main body 2 of the rainwater well is a precast concrete well. The substantive technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: therefore, it can be installed quickly.

[0048] Example 3: As a further improvement, parallel, or optional independent solution, the precast concrete well is made of high-strength concrete, the precast concrete well is made of C30 fine aggregate concrete, and the precast concrete well has built-in FRP reinforcing bars.

[0049] Example 4: As a further improvement, parallel, or optional independent solution, the rainwater branch pipe 6 uses a DN200 or DN300 HDPE pipe, and the interface between it and the precast concrete well body is fixed with an EPDM rubber sealing ring and a pre-embedded stainless steel clamp. The substantive technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: therefore, it can be installed quickly and has a good waterproof effect.

[0050] Example 5: As a further improvement, parallel, or optional independent solution, the slope of the rainwater branch pipe 6 is ≥1%, which can ensure that rainwater quickly flows into the underground main pipe.

[0051] Example 6: As a further improvement, parallel, or optional independent solution, the precast concrete rainwater well body 2 is located in the foundation trench. The bottom of the foundation trench is compacted to a compaction degree of ≥95%, and a 10cm thick C15 concrete cushion layer is laid with a surface flatness error of ≤5mm.

[0052] The precast concrete rainwater well body 2 and the C15 concrete cushion layer are filled with M10 cement mortar to ensure compaction.

[0053] The implementation steps of this composite rainwater well drainage system are as follows:

[0054] For foundation trench excavation and subbase construction, the foundation trench is excavated according to the design dimensions. The bottom of the trench is compacted to a compaction degree of ≥95%. A 10cm thick C15 concrete subbase is laid with a surface flatness error of ≤5mm.

[0055] For the installation of precast rainwater wells, the precast concrete rainwater well body (dimensions: length ≥ 700mm, width 500mm) is vertically placed on the subbase using hoisting equipment, and the well body and the subbase are filled with M10 cement mortar to ensure compaction.

[0056] For the construction of the permeable asphalt concrete layer, a precast permeable asphalt concrete layer is laid on top of the well body, with a layer thickness consistent with the road design elevation and seamlessly connected to the sidewalk curb at the edges. An epoxy resin interface agent (thickness ≥ 1 mm) is applied to the contact surface between the permeable layer and the well body to enhance the bonding strength.

[0057] For rainwater branch pipe connection, the bottom cavity of the rainwater well is connected to the horizontal rainwater branch pipe with a rubber sealing ring, and the slope is ≥1% to ensure that rainwater quickly flows into the underground pipe network main pipe.

[0058] Construction of road surface structural layers.

[0059] Innovatively, each of the above effects exists independently, yet a single structure can be used to combine the results.

[0060] It should be noted that the multiple modules in this patent are an integration of existing technology modules and do not involve any new modules. Even if some modules use programs, those programs are undoubtedly known programs.

[0061] It should be noted that the multiple solutions provided in this patent include their own basic solutions, which are independent of each other and do not restrict each other. However, they can also be combined with each other without conflict to achieve multiple effects.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims.

Claims

1. A composite rainwater well drainage system based on permeable asphalt concrete, characterized in that, The drainage system includes an asphalt concrete surface layer (8), a base layer (9) is arranged below the asphalt concrete surface layer (8), a subbase layer (10) is arranged below the base layer (9), and a rainwater branch pipe (6) is arranged below the subbase layer (10). A precast concrete rainwater well body (2) is arranged on the road, and multiple sets of circular drainage holes (3) are arranged on the precast concrete rainwater well body (2); a permeable asphalt concrete layer (1) is arranged above the precast concrete rainwater well body (2); A water collection cavity (4) is arranged below the main body (2) of the precast concrete rainwater well; The water collection cavity (4) is connected to the rainwater branch pipe (6); A C15 concrete pad (5) is arranged below the water collection cavity (4).

2. The composite rainwater drainage system based on permeable asphalt concrete as described in claim 1, characterized in that, The main body of the rainwater well (2) is a precast concrete well.

3. The porous asphalt concrete-based composite stormwater sump drainage system of claim 2, wherein, The precast concrete well is made of high-strength concrete and C30 fine aggregate concrete. The precast concrete well has built-in FRP reinforcing bars.

4. The porous asphalt concrete-based composite stormwater sump drainage system of claim 1, wherein, The rainwater branch pipe (6) uses DN200 or DN300 HDPE pipe and is fixed to the well body of the precast concrete water well with EPDM rubber sealing ring and pre-embedded stainless steel clamp.

5. The porous asphalt concrete-based composite stormwater sump drainage system of claim 1, wherein, The slope of the rainwater branch pipe (6) is ≥1%, which can ensure that rainwater quickly flows into the underground pipe network main pipe.

6. The porous asphalt concrete based composite stormwater sump drainage system as claimed in claim 1, wherein, The main body of the precast concrete rainwater well (2) is located in the foundation trench. The bottom of the foundation trench is compacted to a compaction degree of ≥95%, and a 10cm thick C15 concrete cushion layer is laid. The surface flatness error is ≤5mm. The precast concrete rainwater well body (2) and the C15 concrete cushion layer are filled with M10 cement mortar to ensure compaction.

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