Anti-waterlogging drainage structure for urban village low-lying area

Abstract

The invention provides an anti-waterlogging drainage structure for a village in city low-lying area. The anti-waterlogging drainage structure comprises a porous permeable drainage layer and a water storage permeation unit. The surface of the porous water-permeable drainage layer is in a micro-slope design, and a porous pipeline is embedded in the porous water-permeable drainage layer, can be arranged in the slope direction or in the direction perpendicular to the slope direction and is connected to an external drainage system. The water storage permeation unit comprises an upper permeation area and a lower water storage area, and the upper permeation area is filled with sandy soil and permeable vegetation and used for slowing down the flow velocity of rainwater and filtering impurities. The lower layer water storage area is provided with a hollow structure, and the hollow structure is connected with an external irrigation system and used for storing and recycling rainwater. According to the anti-waterlogging drainage structure for the village in city low-lying area, the pressure of a drainage system can be remarkably reduced under the rainstorm condition, meanwhile, a water source is provided for follow-up irrigation, and compared with a traditional single drainage or water storage structure, the higher comprehensive management efficiency is achieved, and the higher rainwater storage and staged treatment capacity is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of urban drainage engineering, and particularly relates to an anti-waterlogging drainage structure for low-lying areas in urban villages. Background Art

[0002] Due to the low terrain, low-lying areas in urban villages are often faced with the problem of waterlogging caused by rainstorm water accumulation. The flood prevention and drainage technologies for such areas mainly include traditional drainage systems and sponge city-related facilities. The traditional drainage system usually adopts concrete pipes or open channels to directly discharge rainwater into the municipal sewer through the action of gravity. The technical means of the sponge city include permeable pavements, retention ponds, and rain gardens, etc., which relieve the flood pressure by increasing the surface infiltration and temporary water storage capacity. The retention pond reduces the load on the downstream drainage system by storing rainwater and slowly releasing it.

[0003] In the prior art, although these technologies have improved the waterlogging situation in low-lying areas of the city to a certain extent, there are obvious deficiencies in the dynamic stratified management of rainwater. The traditional drainage system aims mainly at rapid discharge, lacking the ability to store and classify rainwater treatment, resulting in excessive pressure on drainage pipes during rainstorms, and the accumulated water cannot be drained in time, while the rainwater resources are directly lost after the rainfall ends and cannot be effectively utilized. Although the permeable pavements and retention ponds of the sponge city have a certain water storage function, their designs are mostly single-function oriented, and the infiltration and storage capabilities are limited by the fixed structure, making it difficult to achieve dynamic adjustment when the rainfall varies greatly. For example, the retention pond is prone to overflow under rainstorm conditions, and the infiltration efficiency of the permeable pavement decreases after continuous rainfall, making it difficult to balance the dual requirements of rapid drainage and effective water storage. Therefore, the drawbacks of the lack of stratified management make it difficult for the prior art to improve both the drainage efficiency and water storage capacity in low-lying areas of urban villages, restricting their comprehensive application effects. Summary of the Invention

[0004] The embodiment of the present invention provides an anti-waterlogging drainage structure for low-lying areas in urban villages, aiming to solve the problem that the existing flood prevention and drainage technologies lack the ability to store and classify rainwater treatment due to the main goal of rapid discharge.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide an anti-waterlogging drainage structure for low-lying areas in urban villages, including: A porous permeable drainage layer with a slope on the upper surface; a porous pipe is embedded in the porous permeable drainage layer, and the porous pipe is used to be connected with the drainage system to guide rainwater to flow out naturally; The water storage and infiltration unit includes an upper infiltration area and a lower water storage area; the upper infiltration area is located below the porous permeable drainage layer, and the upper infiltration area is filled with sandy soil and permeable vegetation for slowing down the rainwater flow rate and filtering impurities; the lower water storage area has a hollow structure for storing water, and the hollow structure is connected to an external irrigation system; During rainfall, the porous permeable drainage layer guides the surface water accumulation to be discharged through the slope and the porous pipes. At the same time, the water storage and infiltration unit cooperates with the porous permeable drainage layer to store the excess infiltrated rainwater.

[0006] In a possible implementation manner, a rainfall sensor for monitoring rainfall is provided on the upper surface of the porous permeable drainage layer; A water level sensor for monitoring the water depth is provided at the top of the upper infiltration area.

[0007] In a possible implementation manner, the hollow structure is connected to the external irrigation system through a delivery pipeline.

[0008] In a possible implementation manner, the slope range of the porous permeable drainage layer is 2% - 5%; the material of the porous permeable drainage layer is selected from the combination of gravel and permeable concrete.

[0009] In a possible implementation manner, the diameter range of the porous pipes is 50 - 100 mm, and the pipe surface is provided with uniformly distributed pores with a pore diameter of 5 - 10 mm.

[0010] In a possible implementation manner, the permeable concrete is spliced by multiple pieces of permeable concrete, and gravel is filled between two adjacent pieces of permeable concrete.

[0011] In a possible implementation manner, the lower water storage area is made of prefabricated hollow plastic plates.

[0012] In a possible implementation manner, the covering thickness of the permeable vegetation is 50 - 100 mm.

[0013] In this implementation method, through the combined design of the porous permeable drainage layer and the water storage and infiltration unit, rainwater is divided into two parts: rapid drainage and storage for management. The porous permeable drainage layer uses the slope and pipelines to quickly guide surface water, avoiding waterlogging stagnation. The upper infiltration area and the lower water storage area below store excess rainwater through sand filtration and hollow structures. The upper infiltration area, through the natural infiltration of permeable vegetation and sand, not only slows down the rainwater infiltration speed, but also filters sediment and pollutants in the rainwater. At the same time, it regulates the surface humidity through plant transpiration. This characteristic can assist drainage in low-lying areas of urban villages in the city, and can also improve soil and air quality. This layered method can significantly reduce the pressure on the drainage system under heavy rain conditions, and at the same time provide water sources for subsequent irrigation. Compared with traditional single drainage or water storage structures, it has higher comprehensive management efficiency and stronger rainwater storage and grading treatment capabilities. Brief Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the anti-flood drainage structure in the low-lying area of the urban village provided by the embodiment of the present invention; Figure 2 It is a cross-sectional view of the anti-flood drainage structure in the low-lying area of the urban village provided by the embodiment of the present invention; Figure 3 It is a schematic structural diagram of the porous permeable drainage layer of the anti-flood drainage structure in the low-lying area of the urban village provided by the embodiment of the present invention; Figure 4 It is a schematic structural diagram of the water storage and infiltration unit of the anti-flood drainage structure in the low-lying area of the urban village provided by the embodiment of the present invention; Figure 5 It is a schematic structural diagram of the porous pipeline of the anti-flood drainage structure in the low-lying area of the urban village provided by the embodiment of the present invention; Description of the Reference Numerals: 1, porous permeable drainage layer; 2, porous pipeline; 3, upper infiltration area; 4, lower water storage area; 5, rainfall sensor; 6, water level sensor; 7, controller; 8, solar panel. Detailed Embodiment

[0015] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the following further describes the present invention in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0016] Please refer to Figure 1 and Figure 2, the anti - waterlogging drainage structure for low - lying areas in urban villages provided by the present invention will be described. The anti - waterlogging drainage structure for low - lying areas in urban villages includes a porous permeable drainage layer 1 and a water storage and infiltration unit. The porous permeable drainage layer 1 has a slightly sloping surface and is embedded with porous pipes 2. The porous pipes 2 can be arranged along the slope direction or perpendicular to the slope direction, and the porous pipes 2 are connected to an external drainage system. The water storage and infiltration unit includes an upper infiltration area 3 and a lower water storage area 4. The upper infiltration area 3 is filled with sand and permeable vegetation, which is used to slow down the rainwater flow rate and filter impurities. The lower water storage area 4 has a hollow structure, and the hollow structure is connected to an external irrigation system, which is used to store rainwater and reuse it.

[0017] During rainfall, the porous permeable drainage layer 1 guides the surface water accumulation to be discharged through the slope and the porous pipes 2. At the same time, the water storage and infiltration unit cooperates with the porous permeable drainage layer 1 to store the excess infiltrated rainwater.

[0018] Compared with the prior art, the anti - waterlogging drainage structure for low - lying areas in urban villages provided in this embodiment manages rainwater in two parts: rapid discharge and storage through the combined design of the porous permeable drainage layer 1 and the water storage and infiltration unit. The porous permeable drainage layer 1 uses the slope and pipes to quickly guide surface water, avoiding water accumulation. The upper infiltration area 3 and the lower water storage area 4 below store excess rainwater through sand filtration and hollow structure. The upper infiltration area 3 not only slows down the rainwater infiltration rate through the natural infiltration of permeable vegetation and sand, but also filters sediment and pollutants in the rainwater. At the same time, it regulates the surface humidity through plant transpiration. This characteristic can assist drainage in low - lying areas of urban villages and improve soil and air quality. This layered method can significantly reduce the pressure on the drainage system under heavy rain conditions and provide water sources for subsequent irrigation. Compared with traditional single - drainage or water - storage structures, it has higher comprehensive management efficiency and stronger rainwater storage and hierarchical treatment capabilities.

[0019] In addition, the excess rainwater is converted into irrigation resources, which can meet the needs of urban village residents for growing vegetables or greening plants. The coverage of permeable vegetation not only enhances the ecological beauty of the system, but also further regulates the surface humidity through plant transpiration, reducing the phenomenon of slippery ground after rain.

[0020] In some embodiments, a rainfall sensor 5 for monitoring rainfall is provided on the upper surface of the porous permeable drainage layer 1; a water level sensor 6 for monitoring the water depth is provided at the top of the upper infiltration area 3.

[0021] The rainfall sensor 5 and the water level sensor 6 are respectively installed on the surface of the porous permeable drainage layer 1 and the top of the water storage and infiltration unit, and are used to monitor the rainfall and the depth of accumulated water. Correspondingly, the rainfall sensor 5 and the water level sensor 6 can be equipped with a microcontroller. 7 This method can collect the rainfall and the depth of accumulated water data in real time, and trigger the warning of the supporting signal lamp or buzzer when the accumulated water reaches the preset threshold (such as 10-20 cm), which can respond in advance at the beginning of rainfall, prompt residents to take protective measures in time, reduce the losses caused by waterlogging, and is especially suitable for the scenes with strong rainfall suddenness in urban villages.

[0022] In some embodiments, the above-mentioned lower water storage area can adopt, for example Figure 2 the structure shown. Refer to Figure 2 , the hollow structure is connected to the external irrigation system through a delivery pipeline, which can ensure that the excess rainwater is used for irrigation, and the specific delivery pipeline can be equipped with a delivery pump by itself.

[0023] In some embodiments, the above-mentioned porous permeable drainage layer 1 can adopt, for example Figure 1 and Figure 2 the structure shown. Refer to Figure 1 and Figure 2 , the slope range of the porous permeable drainage layer 1 is 2%-5%; the material of the porous permeable drainage layer 1 is selected from the combination of gravel and permeable concrete.

[0024] The slope range of the porous permeable drainage layer 1 is set to 2%-5%, which can not only ensure the smooth flow of rainwater, but also avoid the increase of construction difficulty or material slip caused by too steep slope.

[0025] In this embodiment, when the slope is 2%, it is suitable for the scenes with relatively small rainfall, and the rainwater flows to the porous pipe 2 at a slower speed to ensure the infiltration effect. When the slope is close to 5%, it is more suitable for the rapid drainage requirements under heavy rain conditions. The selection of the highly permeable material of the porous permeable drainage layer 1 fully considers the economy and practicability of urban villages. As a natural material, gravel has the advantages of low cost and easy access, and its particle size is usually controlled between 10-20 mm to balance the water permeability and structural stability. Permeable concrete is made by adding a specific proportion of aggregate and cement, and its porosity can reach 20%-30%, which significantly improves the rainwater infiltration efficiency while ensuring the strength. The combined use of gravel and permeable concrete further optimizes the system performance. For example, a layer of gravel is laid on the upper surface as a buffer, and permeable concrete is used at the bottom to enhance the load-bearing capacity. This material combination method can also be flexibly adjusted according to the specific terrain and budget of urban villages. For example, the thickness of gravel can be increased in relatively flat areas, and permeable concrete is preferred in areas with frequent traffic to prevent material wear.

[0026] In some embodiments, the above-mentioned porous pipe 2 can adopt, for example Figure 5The structure shown. Refer to Figure 5 , the diameter of the porous pipe 2 ranges from 50 to 100 mm, and the pipe surface is provided with uniformly distributed pores with a pore diameter of 5 to 10 mm.

[0027] The diameter range of the porous pipe 2 is set to 50 - 100 mm. This size design comprehensively considers the drainage volume and installation convenience. For example, a pipe with a diameter of 50 mm is suitable for small low-lying areas and can discharge about 0.5 cubic meters of rainwater per hour, while a pipe with a diameter of 100 mm is suitable for areas with frequent heavy rains, and the drainage volume per hour can be increased to more than 1.5 cubic meters. The pores on the pipe surface are uniformly distributed, and the pore diameter is controlled between 5 - 10 mm, which can not only prevent sand and soil blockage but also ensure that rainwater quickly enters the pipe interior. In practical applications, the pore density can be adjusted according to rainfall characteristics. For example, the number of pores can be increased in southern regions with large rainfall, and appropriately reduced in arid northern regions to improve the water storage effect. Multiple pipes are provided, and each pipe can be provided with fixed brackets every 1 - 2 meters to prevent displacement after long-term use. Through the optimization of materials and pores, the drainage efficiency is significantly improved, while maintaining the simplicity and durability of the structure.

[0028] Regarding the porous pipe 2, it can be made of polyethylene or polypropylene materials. Both of these materials have excellent corrosion resistance and anti-aging properties and can be used in humid environments for a long time without being easily deformed or blocked.

[0029] In some embodiments, a specific implementation manner of the above-mentioned porous permeable drainage layer 1 can adopt the structure as shown in Figure 3 The structure shown. Refer to Figure 3 , the permeable concrete is spliced by multiple pieces of permeable concrete, and gravel is filled between two adjacent pieces of permeable concrete.

[0030] The splicing method design of the porous permeable drainage layer 1 fully considers the needs of complex terrain and convenient construction in urban villages. When splicing, 5 - 10 mm thick gravel is filled between blocks as a buffer, which can not only enhance the connection stability but also improve the overall water permeability. Its flexibility makes it suitable for low-lying areas of different scales. For example, a single piece can cover small water accumulation points, and multiple pieces combined can be used for street-level drainage systems. Through the splicing method, the construction difficulty and time cost are significantly reduced, providing convenience for the rapid deployment in urban villages.

[0031] The size of each pervious concrete block can be set to 1 meter × 1 meter. This specification facilitates manual handling and installation. At the same time, through cutting, it can be adapted to irregular terrains. For example, in a narrow roadway, it can be cut into a strip structure of 0.5 meters × 1 meter, or cut into triangles for splicing at the corner. During the installation process, an anti-seepage geomembrane can be laid at the bottom of the drainage layer to prevent excessive rainwater infiltration from affecting the foundation stability. In areas with a large slope, fixing piles can be added, one every 2 meters, with a diameter of about 20 millimeters, to prevent slipping.

[0032] In some embodiments, the lower water storage area 4 described above can adopt the structure as Figure 4 shown. Refer to Figure 4 , the lower water storage area 4 is made of precast hollow plastic plates.

[0033] The lower water storage area 4 is made of precast hollow plastic plates. The hollow structure forms a stable water storage space through internal support columns. The water storage capacity per square meter is 0.05 - 0.1 cubic meters. This range can meet the daily irrigation needs of urban villages. For example, 50 - 100 liters of rainwater can be stored per square meter, which is sufficient to provide irrigation water for the surrounding green belt of 10 - 20 square meters once. A precast plastic plate can be set at the top. The precast plastic plate can be made of high-density polyethylene HDPE material, which has the characteristics of light weight and high compressive strength. The load-bearing capacity of a single block can reach more than 200 kilograms, which is sufficient to withstand the pressure of the upper infiltration area 3. The connection design of the transmission pipeline in the lower water storage area 4 further enhances the practicability. The outlet can be equipped with a simple valve or filter to control the water flow and prevent impurities from entering the irrigation system. During actual installation, the number of layers of the lower water storage area 4 can be adjusted according to the terrain depth. For example, in a deeper low-lying area, two layers can be stacked to increase the water storage capacity, while in a shallow area, only a single layer is used to reduce costs. The modular characteristics make it easy to expand and maintain, and at the same time provide a reliable guarantee for the utilization of rainwater resources.

[0034] In this embodiment, the size of a single precast hollow plastic plate can be 1 meter × 0.5 meters × 0.2 meters, which is convenient for transportation and on-site assembly.

[0035] In some embodiments, the above-mentioned pervious vegetation can adopt the structure as Figure 2 and Figure 4 shown. Refer to Figure 2 and Figure 4 , the covering thickness of the pervious vegetation is 50 - 100 mm.

[0036] The vegetation coverage thickness is set to 50 - 100 mm, which can not only ensure the root growth space but also avoid excessive thickness causing too much load on the drainage layer. When the thickness is 50 mm, it is suitable for small low-lying areas, and the vegetation mainly plays the role of infiltration and beautification; while when the thickness reaches 100 mm, it is more suitable for areas with higher ecological restoration requirements, and the vegetation can also adsorb particulate matter in the air and improve the air quality in urban villages. When planting vegetation, a layer of permeable non-woven fabric can be laid first as an isolation layer to prevent sand and soil loss. Through the ecological functions of the vegetation, the environmental benefits and sustainability of the system are improved.

[0037] In this embodiment, the permeable vegetation is mainly selected from waterlogging-tolerant herbaceous plants, such as reed and bermudagrass, which have strong adaptability in the environment of urban villages. The roots of reed are developed and can penetrate into the soil by 10 - 20 cm, which not only enhances the stability of the upper permeable area 3 but also reduces surface water accumulation by absorbing water through the roots. Its growth cycle is up to 2 - 3 years, and the maintenance cost is low. Bermudagrass is famous for its creeping growth characteristics and can quickly cover the ground to form a dense turf. Its waterlogging tolerance enables it to survive in waterlogged environments and regulate soil moisture through transpiration.

[0038] As several specific implementation manners of the present invention: Embodiment 1: Drainage system for low-lying areas in small residential areas Structure and parameters Porous permeable drainage layer 1: Crushed stone material is used, with a particle size of 10 - 15 mm, a slope of 2%, a single-piece size of 0.5 m × 1 m, and a covered area of 10 square meters. A porous pipe 22 with a diameter of 50 mm, a pore diameter of 5 mm, and a pipe length of 5 m is embedded, and the end is connected to the community sewer.

[0039] Water storage and infiltration unit: The upper permeable area 3 is filled with 10 cm thick sandy soil, planted with bermudagrass, and the coverage thickness is 50 mm; the lower water storage area 4 uses a single-layer precast hollow plastic board, with a water storage capacity of 0.05 cubic meters per square meter, a transmission pipeline diameter of 10 mm, and a length of 1 m, which is connected to the courtyard flower bed.

[0040] Control unit: A rainfall sensor 5 and a water level sensor 6 are installed in the center of the porous permeable drainage layer 1. The microcontroller is powered by a solar panel 8 (with a power of 10W), the warning threshold is set to a water accumulation depth of 10 cm, and the signal is sent through a red LED light.

[0041] Implementation steps: Level the ground at the low-lying area in the residential area and lay an anti-seepage geomembrane as the bottom layer.

[0042] Splice the porous permeable drainage layer 1 and embed the porous pipe 2 to ensure that the pipe slope is consistent with the slope of the porous permeable drainage layer 1.

[0043] Install the water storage and infiltration unit, fill it with sandy soil and plant bermudagrass, and connect the thin pipe to the flower bed.

[0044] Fix each sensor and controller on the surface of the drainage layer, and install the solar panel 8 on the top of the nearby wall.

[0045] Applicable scenarios and effects: Scenario: Applicable to low-lying courtyards in small residential areas in urban villages in the city, with relatively small rainfall (20 - 30 mm per hour).

[0046] Effect: The system quickly drains the surface water accumulation. The water storage capacity is sufficient to irrigate the surrounding 5 square meters of greenery. The warning system reminds residents to clean up sundries at the initial stage of water accumulation. The construction period only takes 1 - 2 days, and the cost is about 50 yuan per square meter.

[0047] Embodiment 2: Stormwater drainage system for narrow alleys Structure and parameters The porous permeable drainage layer 1: Made of permeable concrete, with a porosity of 25%, a slope of 5%, a single-piece size of 1 m × 0.5 m, and a covered area of 20 square meters. Embedded with porous pipes 22, with a diameter of 80 mm, a pore diameter of 8 mm, a pipe length of 10 m, and the end connected to the municipal drainage pipe.

[0048] The water storage and infiltration unit: The upper infiltration area 3 is filled with a 15 - centimeter - thick mixed layer of sandy soil and gravel, planted with reeds, with a covering thickness of 80 mm; the lower water storage area 4 uses double - layer hollow plastic plates, with a water storage capacity of 0.1 cubic meters per square meter, a transmission pipeline diameter of 15 mm, a length of 1.5 m, and connected to the green belts on both sides of the alley.

[0049] The control unit: The rainfall sensor 5 and the water level sensor 6 are installed at both ends of the alley. The micro - controller is powered by the solar panel 8 (with a power of 15W), the warning threshold is set to a water accumulation depth of 15 cm, and the signal is emitted through a buzzer (80 decibels).

[0050] Implementation steps Clean up sundries in the low - lying section of the alley and lay a gravel cushion layer.

[0051] Pour permeable concrete to form the porous permeable drainage layer 1, embed the porous pipes 2, and ensure that the pipes are consistent with the slope of the alley.

[0052] Install the double - layer water storage and infiltration unit, fill it with sandy soil and gravel, plant reeds, and connect the thin pipe to the green belt.

[0053] Fix the sensors and controllers at both ends of the alley, and install the solar panel 8 on the roof of the building beside the alley.

[0054] Applicable scenarios and effects Scenario: Applicable to narrow alleys in urban villages in the city, with frequent heavy rains (50 - 70 mm per hour).

[0055] Effect: The system can quickly drain water under heavy rain, with a drainage volume of about 2 cubic meters per hour. The stored water can be used for the greening of 10 square meters. The buzzer warning covers a radius of 30 meters to remind residents to evacuate in time. The construction period is about 3 days, and the cost is about 80 yuan per square meter.

[0056] Example 3: Drainage System for Ecological Restoration of Public Open Spaces Structure and Parameters Porous Permeable Drainage Layer 1: It uses a combination of gravel and permeable concrete (5 cm of gravel on the upper layer and 10 cm of concrete on the lower layer), with a slope of 3%. The single-piece size is 1 m × 1 m, and the covered area is 50 square meters. It is embedded with porous pipes 22, with a diameter of 100 mm, a pore diameter of 10 mm, a pipe length of 20 meters, and the end is connected to a rainwater collection well.

[0057] Water Storage and Infiltration Unit: The upper infiltration area 3 is filled with 20 cm thick sandy soil and planted with a mixed vegetation of reeds and bermudagrass, with a covering thickness of 100 mm; the lower water storage area 4 uses three layers of hollow plastic plates, with a water storage capacity of 0.15 cubic meters per square meter. The transmission pipeline has a diameter of 20 mm and a length of 2 meters, and is connected to a nearby vegetable field.

[0058] Control Unit: Rain sensors 5 and water level sensors 6 are distributed at the four corners of the open space. The microcontroller is powered by a solar panel 8 (with a power of 20W). The warning threshold is set at a water accumulation depth of 20 cm, and the signal is sent through a combination of signal lights and buzzers.

[0059] Implementation Steps Dig a 10 cm deep foundation at the low-lying area of the open space and lay an anti-seepage geomembrane.

[0060] Lay a gravel layer and a permeable concrete layer to form the porous permeable drainage layer 1, embed the porous pipes 2, and connect them to the rainwater well.

[0061] Install the three-layer water storage and infiltration unit, fill it with sandy soil, plant the mixed vegetation, and connect the thin pipes to the vegetable field.

[0062] Install sensors and controllers at the four corners of the open space, and fix the solar panel 8 on a vertical pole with a height of 2 meters.

[0063] Applicable Scenarios and Effects Scenario: Suitable for public open spaces or abandoned low-lying areas in urban villages, taking into account both drainage and ecological restoration (rainfall of 30 - 50 mm).

[0064] Effect: The drainage capacity of the system reaches 5 cubic meters per hour. The stored water volume can be used for the irrigation of 20 square meters of vegetable fields. The vegetation coverage improves the environmental quality. The warning signal covers a range of 50 meters. The construction period is about 5 days, and the cost is about 100 yuan per square meter.

[0065] Example 4: Drainage System for Temporary Construction Sites Structure and Parameters Porous Permeable Drainage Layer 1: Made of gravel material with a particle size of 15 - 20 mm, a slope of 4%, a single piece size of 1 m × 1 m, and a coverage area of 30 square meters. It is embedded with a porous pipe 22 with a diameter of 60 mm, a pore diameter of 6 mm, a pipe length of 15 m, and the end is connected to a temporary drainage ditch.

[0066] Water Storage and Infiltration Unit: The upper infiltration area 3 is filled with 10 cm thick sandy soil and planted with Bermuda grass, with a covering thickness of 60 mm; the lower water storage area 4 uses a single - layer hollow plastic board, with a water storage capacity of 0.06 cubic meters per square meter, a transmission pipeline diameter of 12 mm, and a length of 1.2 m, which is connected to a water storage bucket.

[0067] Control Unit: A rainfall sensor 5 and a water level sensor 6 are installed in the center of the site. The micro - controller is powered by a portable solar panel 88 (with a power of 12W), the warning threshold is set to a water accumulation depth of 12 cm, and the signal is sent out through a red LED light.

[0068] Implementation Steps Level the ground at the low - lying area of the construction site and lay a temporary gravel cushion layer.

[0069] Piece together the porous permeable drainage layer 1, embed the porous pipe 2, and connect it to the temporary drainage ditch.

[0070] Install the single - layer water storage and infiltration unit, fill it with sandy soil and plant Bermuda grass, and connect the thin pipe to the water storage bucket.

[0071] Fix the sensors and the controller in the center of the site, and place the portable solar panel 8 on a movable bracket.

[0072] Applicable Scenarios and Effects Scenario: Applicable to temporary construction sites in urban villages with moderate rainfall (30 mm per hour).

[0073] Effect: The system drains water quickly, with a drainage volume of about 1.5 cubic meters per hour. The stored water can be used for construction. The warning reminds workers to suspend operations. The system is detachable and can be reused. The construction period is 2 days, and the cost is about 60 yuan per square meter.

[0074] The above - mentioned are only the preferred embodiments of the present invention, and they are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. The anti-infiltration drainage structure in the low-lying area of the urban village is characterized in that Comprising: A porous permeable drainage layer with a slope on its upper surface; a porous pipe is embedded in the porous permeable drainage layer, and the porous pipe is used to connect with a drainage system to guide rainwater to flow out naturally; A water storage and infiltration unit, including an upper infiltration area and a lower water storage area; the upper infiltration area is located below the porous permeable drainage layer, and the upper infiltration area is filled with sandy soil and permeable vegetation for slowing down the flow rate of rainwater and filtering impurities; the lower water storage area has a hollow structure for storing water, and the hollow structure is connected to an external irrigation system; During rainfall, the porous permeable drainage layer guides the discharge of surface water accumulation through the slope and the porous pipe, and at the same time, the water storage and infiltration unit cooperates with the porous permeable drainage layer to store the excess infiltrated rainwater.

2. The low-lying area anti-flood drainage structure in the urban village as described in claim 1 is characterized in that, A rainfall sensor for monitoring rainfall is provided on the upper surface of the porous permeable drainage layer; A water level sensor for monitoring the water depth is provided at the top of the upper infiltration area.

3. The anti-internal waterlogging drainage structure in the low-lying area of the urban village as described in claim 1 is characterized in that, The hollow structure is connected to the external irrigation system through a delivery pipeline.

4. The anti-internal waterlogging drainage structure in the low-lying area of the urban village as described in claim 1 is characterized in that, The slope range of the porous permeable drainage layer is 2% - 5%; the material of the porous permeable drainage layer is selected from the combination of gravel and permeable concrete.

5. The low-lying area anti-flood drainage structure in the urban village as described in claim 4, characterized in that, The diameter range of the porous pipe is 50 - 100 mm, and uniformly distributed pores with a pore diameter of 5 - 10 mm are provided on the pipe surface.

6. The anti-internal waterlogging drainage structure for low-lying areas in urban villages as described in claim 4, characterized in that, The permeable concrete is spliced by multiple pieces of permeable concrete, and gravel is filled between two adjacent pieces of permeable concrete.

7. The anti-internal waterlogging drainage structure for low-lying areas in urban villages as described in claim 1 is characterized in that, The lower water storage area is made of prefabricated hollow plastic plates.

8. The low-lying area anti-waterlogging drainage structure in the urban village as described in claim 1, characterized in that, The covering thickness of the permeable vegetation is 50 - 100 mm.

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