Water-permeable sidewalk

Abstract

The utility model discloses a water-permeable sidewalk which comprises a foundation soil layer, a graded broken stone layer, a water-permeable concrete layer, a leveling layer and water-permeable bricks which are laid upwards layer by layer, the water-permeable sidewalk further comprises curbs arranged on the side edge of the sidewalk, and a drainage pipe network is arranged in the graded broken stone layer; the drainage pipe network comprises double-layer water inlet pipes, a connecting pipe and a water outlet pipe, the multiple double-layer water inlet pipes are arranged at intervals along the sidewalk and each comprise an inner pipe and an outer pipe, each inner pipe is provided with multiple inner pipe water inlet holes, and each outer pipe is provided with multiple outer pipe water inlet holes. The problems that an existing sidewalk structure is poor in water permeable effect, low in drainage efficiency, poor in water storage buffering capacity and the like are solved, rainwater can permeate to the deep underground layer by layer through the arrangement of the multiple layers of water permeable structures, excessive rainwater can be directly drained into municipal drainage pipelines through a drainage pipe network, and the drainage effect is good. The pavement can realize quick drainage and is not easy to block by sand and stones, and the pavement is good in water permeability, water storage and drainage performance and stable in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of road construction, in particular to a permeable sidewalk. Background Technique

[0002] In urban construction, many original natural terrains such as green spaces and forests have been replaced by construction-hardened concrete, resulting in fewer permeable areas, reduced rainwater infiltration, and damage to the natural water cycle system. Especially in the road area, when there is heavy rainfall, if the drainage cannot be carried out in time, it will cause a large amount of water accumulation on the road surface, affecting traffic safety.

[0003] In general road design, the sidewalk is usually higher than the lane. The rainwater that cannot penetrate the sidewalk will flow into the drainage openings beside the lane, further increasing the drainage load of the lane. Moreover, the accumulated rainwater layer on the sidewalk will seriously affect the walking experience of pedestrians. Therefore, enhancing the permeable performance and self-drainage ability of the sidewalk is an important construction requirement. Chinese Patent Publication No. CN213507894U, with a publication date of June 22, 2021, and a name of "A permeable pavement for sidewalks" discloses a sidewalk pavement structure, including curb stones, planting belts, and sidewalks. The sidewalk includes a soil base layer and permeable bricks laid on the soil base layer. The soil base layer is provided with diversion channels, and the diversion channels are filled with gravel layers, and water pipes can be optionally arranged. This pavement structure can increase the permeability of the sidewalk and has a certain drainage ability. However, the road structure provided by this patent is relatively simple, there are few permeable buffer layers on the soil base layer, and the water storage capacity is poor. Laying the permeable bricks directly on the gravel layer will cause the pavement structure to be unstable. The water pipes set therein adopt a single-layer structure. If the water inlet holes are too large, a large amount of sediment will enter the pipeline while draining water, affecting the drainage quality of the pipeline. If the water inlet holes are too small, they are easily blocked by sand and stones. And because they are underground pipelines, they are not easy to repair. The number and degree of blockage of the water inlet holes will continue to accumulate, resulting in a continuous decline in the permeable drainage performance of the sidewalk. Content of the Utility Model

[0004] The utility model overcomes the problems of poor water permeability effect, low drainage efficiency, and poor water storage and buffering ability of the existing sidewalk structure, and provides a permeable sidewalk. By setting a multi-layer permeable structure, rainwater can penetrate layer by layer downward to the deep underground, and part of the rainwater can be stored to approach the slow evaporation ability of water storage under the natural terrain. Excessive rainwater can be directly discharged into the municipal drainage pipeline through the drainage pipe network, without occupying the drainage openings of the lane. And the pipeline adopts a double-layer structure, and the drainage holes of the outer pipe and the inner pipe cooperate to achieve rapid drainage and are not easily blocked by sand and stones. The sidewalk has good water permeability, water storage, and drainage performance, and the structure is stable.

[0005] In order to achieve the above purpose, the utility model adopts the following scheme:

[0006] A permeable sidewalk, comprising a base soil layer, a graded crushed stone layer, a permeable concrete layer, a leveling layer and permeable bricks laid layer by layer upwards, and further comprising a curbstone arranged on the side of the sidewalk, wherein a drainage pipe network is arranged in the graded crushed stone layer;

[0007] The drainage pipe network includes a double-layer inlet pipe, a connecting pipe and an outlet pipe. A plurality of the double-layer inlet pipes are arranged at intervals along the sidewalk and each includes an inner pipe and an outer pipe. A plurality of inner pipe inlet holes are arranged on each inner pipe, and a plurality of outer pipe inlet holes are arranged on each outer pipe. The connecting pipe penetrates through the outer pipe and sequentially connects adjacent inner pipes. One end of the outlet pipe communicates with the connecting pipe and the other end communicates with a municipal drainage pipe.

[0008] Preferably, the inner pipe inlet holes are arranged at the top and both sides of the inner pipe, and the outer pipe inlet holes and the inner pipe inlet holes are arranged in a staggered manner.

[0009] Preferably, the inner pipe inlet holes are covered with geotextiles.

[0010] Preferably, the bottom of the outer pipe is provided with seepage holes.

[0011] Preferably, the connecting pipe is connected to the middle of the inner pipe, and the connecting pipes on adjacent inner pipes are connected by a water pipe joint.

[0012] Preferably, at least a part of the water pipe joints are three-way joints, and the outlet pipe is connected to the three-way joints.

[0013] Preferably, a pipe sleeve is sleeved on the inner pipe, and screw holes and screws matching therewith are arranged on both sides of the pipe sleeve. The screws penetrate into the outer pipe from the outside and are tightened in the screw holes.

[0014] Preferably, curbstones are arranged on both sides of the sidewalk. The curbstone on the side close to the lane is arranged on a lime soil layer extending from the bottom layer of the lane, and a concrete backrest is arranged on the outer side of the bottom of the curbstone on the side far from the lane.

[0015] The utility model has at least the following beneficial effects: (1) Adopting a multi-layer permeable structure, it ensures the permeable depth of the sidewalk. Rainwater seeps layer by layer and is not easy to form ponding on the road surface, and has a water storage capacity closer to that of natural soil layers; (2) A drainage pipe network is arranged in the lower graded crushed stone layer. The sidewalk itself has the ability to drain excess rainwater, does not need to rely on the drainage outlets of the lane, ensures the continuous permeability of the sidewalk, and reduces the pressure on surface drainage; (3) The used drainage pipe network uses a double-layer inlet pipe structure. The cooperation of the inner and outer pipes makes the pipeline not easy to be blocked and damaged, and can achieve efficient and stable drainage. Description of the Drawings

[0016] Figure 1Schematic diagram of the overall structure of a sidewalk of the present utility model;

[0017] Figure 2 Schematic diagram of the drainage pipe network structure of the present utility model;

[0018] Figure 3 Schematic diagram of the double-layer water inlet pipe structure of the present utility model.

[0019] In the figure: base soil layer 1, graded crushed stone layer 2, permeable concrete layer 3, leveling layer 4, permeable bricks 5, curbstone 6, connecting pipe 7, outlet pipe 8, inner pipe 9, outer pipe 10, inner pipe water inlet hole 11, outer pipe water inlet hole 12, water pipe joint 13, pipe sleeve 14, lime soil layer 15, concrete backrest 16. Specific implementation manners

[0020] The following further describes the present utility model in detail with reference to the accompanying drawings, so that those skilled in the art can implement it according to the description in the specification.

[0021] It should be understood that terms such as "having", "comprising", and "including" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0022] It should be noted that the experimental methods described in the following implementation schemes are all conventional methods unless otherwise specified, and the materials can be obtained from commercial channels unless otherwise specified; in the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "set" should be understood in a broad sense. For example, they can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. The orientation or positional relationship indicated by terms such as "horizontal", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0023] Such as Figures 1-3As shown in the figure, a permeable sidewalk provided by the utility model includes a base soil layer 1, a graded gravel layer 2, a permeable concrete layer 3, a leveling layer 4, and permeable bricks 5 laid layer by layer upwards. It also includes a curb 6 arranged on the side of the sidewalk. A drainage pipe network is arranged in the graded gravel layer 2. The base soil layer 1 serves as the foundation of the overall structure of the sidewalk and mainly consists of the original plain soil at the construction site. The graded gravel layer 2 is composed of coarse aggregates, fine aggregates, etc. The size of the gravel and the thickness of this layer are selected according to actual construction requirements. Appropriate-sized gaps are formed in the graded gravel layer 2 to provide a large amount of space for the infiltration and flow of rainwater. The permeable concrete layer 3 uses permeable cement concrete, and the porosity of the concrete is controlled above 20% to ensure a good water seepage effect. The leveling layer 4 laid above the permeable concrete layer 3 can adopt a relatively thin medium sand leveling layer. The permeable bricks 5 at the top adopt an inlaid laying method that is convenient for removal. By adjusting the thickness of the leveling layer 4, the permeable bricks 5 form a flat road surface. The curb 6 can be arranged at the position where the sidewalk meets the lane, or curbs 6 can be arranged on both sides of the sidewalk, depending on the width and layout requirements of the road. Generally, the curb 6 extends from the road surface of the sidewalk down to the depth of the graded gravel layer 2.

[0024] The drainage pipe network includes double-layer inlet pipes, connecting pipes 7 and outlet pipes 8. Multiple double-layer inlet pipes are arranged at intervals along the sidewalk and each includes an inner pipe 9 and an outer pipe 10. A plurality of inner pipe water inlet holes 11 are provided on each inner pipe 9, and a plurality of outer pipe water inlet holes 12 are provided on each outer pipe 10. The connecting pipe 7 passes through the outer pipe 10 and sequentially connects adjacent inner pipes 9. One end of the outlet pipe 8 communicates with the connecting pipe 7 and the other end communicates with the municipal drainage pipe. The drainage pipe network is arranged in the middle or lower position of the graded crushed stone layer 2 so as to be able to drain more rainwater in the graded crushed stone layer 2 in time. The inner pipe 9 of the double-layer inlet pipe is suspended in the outer pipe 10, and there is a certain distance between the inner pipe 9 and the inner bottom of the outer pipe 10 to prevent a small amount of sediment deposited in the outer pipe 10 from entering the inner pipe 9. The outer pipe 10 communicates with the outside through the outer pipe water inlet holes 12, and the outer pipe 10 and the inner pipe 9 communicate through the inner pipe water inlet holes 11. Since the outer pipe 10 provides a buffer space between the inner pipe 9 and the outside, the outer pipe water inlet holes 12 can be set larger to avoid being blocked by crushed stones. A small amount of sediment and crushed stones entering the outer pipe 10 will be deposited at the bottom and will not block the inner pipe water inlet holes 11. Therefore, the inner pipe water inlet holes 11 can be set smaller or covered with a relatively fine filtering structure, so that the content of solid impurities in the rainwater discharged from the inner pipe 9 is less. It should be noted that the rainwater entering the graded crushed stone layer 2 is infiltrated rainwater and will not cause strong scouring. Therefore, after a period of drainage, the unstable soil, sand and stones in the graded crushed stone layer 2 will become less and less until the graded crushed stone layer 2 is balanced into a stable and less quicksand permeable structure. Therefore, the sediment entering the outer pipe 10 will not be blocked due to continuous large-scale deposition. The laying density of the double-layer inlet pipes is determined according to the permeable drainage requirements of the sidewalk design. The connecting pipe 7 passes through the outer pipe 10 and there is no gap between the connecting pipe 7 and the outer pipe 10. The connecting pipe 7 can be arranged on both sides of the inner pipe 9. The connecting pipes 7 between adjacent two inner pipes 9 can be connected in a sleeved or joint-transferring manner. The outlet pipe 8 is arranged on the side or bottom of the connecting pipe 7. In actual situations, it is not necessary to arrange an outlet pipe 8 between every two double-layer inlet pipes, but they are arranged at uniform intervals.

[0025] As a construction example, on the base soil layer 1, the thickness of the laid graded crushed stone layer 2 is 20 cm, and the four-level prepared materials are used: 22-32 mm crushed stones, 12-22 mm crushed stones, 5-12 mm crushed stones, 0-5 mm stone chips. The spacing of the double-layer inlet pipes among them is 1 m; the thickness of the permeable concrete layer 3 is 15 cm and the porosity is 30%; the thickness of the leveling layer 4 is 2 cm, and it is made of compacted permeable medium sand mortar; the single body length, width and height of the permeable brick 5 are 20 cm, 10 cm and 6 cm respectively, and the permeable brick 5 is paved with a 5 mm permeable gap.

[0026] This sidewalk adopts a multi-layer permeable structure, which ensures the permeable depth of the sidewalk. Rainwater seeps layer by layer and is not easy to form ponding on the road surface, and has a water storage capacity closer to that of natural soil layers. A drainage pipe network is arranged in the graded gravel layer 2 at the lower layer. The sidewalk itself has the ability to drain excess rainwater, does not need to rely on the drainage outlets of the lanes, ensures the continuous water permeability of the sidewalk, and reduces the pressure on surface drainage. The drainage pipe network used adopts a double-layer water inlet pipe structure. With the cooperation of the inner and outer water inlet pipes, the outer pipe 10 can play a role in sediment deposition of sand and gravel, and the outer pipe 10 also plays a protective role for the inner pipe 9. When an object exceeding the bearing capacity is placed or passes on the sidewalk, the outer pipe 10 plays a role in pressure-bearing buffering. Even if the outer pipe 10 is deformed or slightly cracked, it will not affect the structural form of the inner pipe 9, ensuring the drainage performance. The drainage pipes are not easy to be blocked and damaged, and can achieve efficient and stable drainage.

[0027] In another technical solution, as Figure 2 shown, the inner pipe water inlet holes 11 are arranged at the top and both sides of the inner pipe 9, and the outer pipe water inlet holes 12 and the inner pipe water inlet holes 11 are arranged staggeredly. The inner pipe water inlet holes 11 are arranged at the top and both sides. At this time, after the rainwater enters the outer pipe 10, most of it needs to flow upward or horizontally into the inner pipe 9. The staggeredly arranged outer pipe water inlet holes 12 and inner pipe water inlet holes 11 can also extend this process. The soil, sand and gravel carried by the water flow will settle to the bottom of the outer pipe 10, and the settled sand and gravel will not enter the inner pipe 9 from the bottom without holes of the inner pipe 9, reducing the sediment content of the water flow discharged from the inner pipe 9.

[0028] The inner pipe water inlet holes 11 are covered with geotextiles. The geotextiles can further increase the filtering effect of the inner pipe water inlet holes 11, make the water discharged from the outlet pipe 8 cleaner, and can collect the discharged rainwater for the daily maintenance of green vegetation.

[0029] The bottom of the outer pipe 10 is provided with water seepage holes. Since the rainwater in the outer pipe 10 cannot be completely discharged by the inner pipe 9, some rainwater will be left after the rain. The humid environment formed by a small amount of water can maintain the drainage performance of the pipeline. And the space inside the outer pipe 10 has a certain degree of airtightness. Water seepage holes with smaller sizes are arranged at the bottom of the outer pipe 10. When the surrounding moisture evaporates in large amounts, the remaining water in the outer pipe 10 can slowly seep and be drained completely.

[0030] In another technical solution, as Figure 2 shown, the connecting pipe 7 is connected to the middle of the inner pipe 9, and the connecting pipes 7 on two adjacent inner pipes 9 are connected through a water pipe joint 13. The water pipe joint 13 can adopt a common joint with a threaded inner wall, so that the components of the drainage pipe network can be conveniently disassembled, transported and quickly assembled. The distance between the double-layer water inlet pipes can also be adjusted by adding an extension pipe through the water pipe joint 13.

[0031] At least a part of the water pipe joint 13 is a tee joint, and the outlet pipe 8 is connected to the tee joint. The tee joint is arranged at the position where the outlet pipe 8 needs to be installed. Generally, adjacent tee joints can meet the drainage requirements by being arranged at intervals of two or three double-layer inlet pipes.

[0032] In another technical solution, as Figure 2 and Figure 3 shown, a pipe sleeve 14 is sleeved on the inner pipe 9. Threaded holes and screws matching therewith are provided on both sides of the pipe sleeve 14. The screws penetrate into the outer pipe 10 from the outside and are tightened in the threaded holes. The pipe sleeve 14 is in the shape of a short sleeve, and its position avoids the water inlet holes 11 of the inner pipe. Two convex blocks are oppositely arranged on the outer side of the inner pipe 9, and the threaded holes are arranged in the convex blocks. Corresponding positions on the outer pipe 10 are also provided with convex blocks with flat surfaces. This convex block avoids the water inlet holes 12 of the outer pipe and is provided with through holes corresponding to the threaded holes. The through holes have no threads, and the screws pass through the through holes and are tightened in the threaded holes. The screws and threaded holes on both sides cooperate to fix the inner pipe 9 at the central position of the outer pipe 10.

[0033] In another technical solution, as Figure 1 shown, curb stones 6 are provided on both sides of the road. Among them, the curb stone 6 close to the lane side is arranged on the lime soil layer 15 extending from the bottom layer of the lane, and a concrete backrest 16 is arranged on the outer side of the bottom of the curb stone 6 far from the lane side. The curb stone 6 close to the lane side is fixed by the support of the lane lime soil layer 15 and the top support of the lane hardening structure. A part of the lane lime soil layer 15 extends to the base soil layer 1 at the bottom of the graded gravel layer 2 to strengthen the connection between the bottom structures of the lane and the sidewalk. And the side of the sidewalk far from the lane is mostly an unhardened green belt or buffer zone. Therefore, the curb stone 6 is supported from the bottom and side by the concrete backrest 16, and the curb stone 6 is fixed to the concrete backrest 16 by cement mortar about 2 cm thick.

[0034] The equipment quantities and treatment scales described here are used to simplify the description of the present invention. Applications, modifications, and variations of the present invention are obvious to those skilled in the art.

[0035] Although the embodiments of the present invention have been disclosed as above, it is not limited to only the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.

Claims

1. A permeable sidewalk, characterized in that: It includes a base soil layer, a graded crushed stone layer, a permeable concrete layer, a leveling layer and permeable bricks laid upward layer by layer, and also includes a curbstone arranged on the side of the sidewalk, wherein a drainage pipe network is arranged in the graded crushed stone layer; The drainage pipe network includes a double-layer water inlet pipe, a connecting pipe and a water outlet pipe. Multiple double-layer water inlet pipes are arranged at intervals along the sidewalk and each includes an inner pipe and an outer pipe. Each inner pipe is provided with a plurality of inner pipe water inlet holes, and each outer pipe is provided with a plurality of outer pipe water inlet holes. The connecting pipe passes through the outer pipe and connects adjacent inner pipes in sequence. One end of the water outlet pipe is connected to the connecting pipe, and the other end is connected to the municipal drainage pipe.

2. A permeable sidewalk according to claim 1, characterized in that: The inner tube water inlet holes are arranged at the top and both sides of the inner tube, and the outer tube water inlet holes and the inner tube water inlet holes are arranged alternately.

3. A permeable sidewalk according to claim 1, characterized in that: The water inlet hole of the inner pipe is covered with geotextile.

4. A permeable sidewalk according to claim 1, characterized in that: The bottom of the outer tube is provided with a water seepage hole.

5. The permeable sidewalk according to claim 1, characterized in that: The connecting pipe is connected to the middle of the inner pipe, and the connecting pipes on two adjacent inner pipes are connected through a water pipe joint.

6. A permeable sidewalk according to claim 5, characterized in that: At least a portion of the water pipe joints are three-way joints, and the water outlet pipe is connected to the three-way joints.

7. The permeable sidewalk according to claim 1, characterized in that: A pipe sleeve is sleeved on the inner pipe, and screw holes and screws matching the screw holes are arranged on both sides of the pipe sleeve. The screws penetrate into the outer pipe from the outside and are tightened in the screw holes.

8. The permeable sidewalk according to claim 1, characterized in that: There are curbstones on both sides of the sidewalk. The curbstone close to the lane is set on a lime soil layer extending from the bottom layer of the lane, and a concrete backrest is set on the outer side of the bottom of the curbstone away from the lane.

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