Waterproof brick subsidence sidewalk structure

Abstract

The utility model provides a kind of anti-permeable brick subsidence sidewalk structure, it is related to water-permeable pavement technical field, including roadbed and kerb, roadbed is located on the outside of kerb and is provided with drainage ditch, the roadbed is sequentially laid with anti-seepage geotextile, graded broken stone layer, porous concrete layer, water-permeable geotextile, assembly component layer from bottom to top, the drainage pipe that is connected drainage ditch and assembly component layer is pre-buried in the porous concrete layer The assembly component layer includes assembly module, water-permeable brick and leveling sand layer, the lateral wall of assembly module side is provided with transverse flow notch, the flow reduction bottom plate is arranged in assembly slot lower side, the fish scale notch of being provided with fish scale weir is arranged in several staggered on the flow reduction bottom plate. In the utility model, fish scale weir can slow down the surplus rainwater of transverse flow, reduce the impact of water flow on leveling sand layer, avoid causing structural layer cavity and pavement settlement.

Description

Technical Field

[0001] This utility model relates to the field of permeable pavement technology, specifically to a sidewalk structure that prevents permeable bricks from sinking. Background Technology

[0002] Traditional permeable pavement leveling sand layers for sidewalks use 3cm of medium-coarse sand. In coastal areas, where rainfall is high due to the rainy season and typhoons, and the medium-coarse sand used has a smaller particle size, the entire layer is permeable. To prevent the medium-coarse sand in the leveling sand layer from being washed away into the permeable concrete base layer by surface water, which can cause the permeable bricks to sink, a layer of permeable geotextile is usually laid between the leveling sand layer and the underlying gravel water storage layer to prevent foundation settlement. However, the permeability of permeable geotextile is not unlimited. When the rainfall intensity exceeds the road surface's infiltration capacity, waterlogging will occur. Excess rainwater will form a lateral flow at the slightly sloping leveling sand layer, flowing towards the drainage facilities on both sides of the sidewalk, exerting a lateral scouring force on the leveling sand, causing the loss of fine particles. Over time, this will cause voids in the structural layer and road surface settlement. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a sidewalk structure that prevents water-permeable bricks from sinking, thus solving the problems mentioned in the background section.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A subsidence-resistant pedestrian walkway structure using permeable bricks includes a roadbed and curb stones on both sides of the roadbed. A drainage ditch is provided on the roadbed outside the curb stones. From bottom to top, the roadbed is laid with an impermeable geotextile, a layer of graded crushed stone, a layer of porous concrete, another layer of permeable geotextile, and a layer of assembled components. The assembled component layer includes assembled modules, permeable bricks, and a leveling sand layer. The assembled modules are spliced ​​together and placed on top of the permeable geotextile. Several assembly grooves are formed in the middle of each assembled module. Crossflow slots are formed on the side walls of each assembled module facing the curb stones. A flow-reducing bottom plate is provided below each assembly groove. Several staggered fish-scale slots are formed on the flow-reducing bottom plate. Fish-scale weirs are formed at the outer edges of the fish-scale slots. The leveling sand layer is filled in the lower part of the assembly groove, and the permeable bricks are placed in a convex-concave fit on the upper part of the assembly groove.

[0005] Preferably, the graded crushed stone layer, porous concrete layer, permeable geotextile, and assembled component layer are provided with a slight slope from the middle to both sides.

[0006] Preferably, a number of drainage pipes are pre-embedded in the porous concrete layer near the curb, with the upper end of the drainage pipe penetrating the permeable geotextile and the lower end of the drainage pipe connected to the drainage ditch.

[0007] Preferably, the upper end of the drain pipe is disposed on a filter screen.

[0008] Preferably, the sidewall of the drainage ditch is positioned on the filter plate at the location corresponding to the graded crushed stone layer.

[0009] This utility model provides a sidewalk structure that prevents subsidence caused by permeable bricks. It has the following beneficial effects: 1. Under normal rainfall, rainwater will flow along the permeable bricks and leveling sand layer and through the fish-scale grooves. Due to the presence of the fish-scale weir, when the water collection is small, it will not flow laterally along the micro-slope. Instead, it will seep down from the permeable geotextile into the graded crushed stone layer and smoothly enter the drainage ditch. Through the filtration effect of the permeable geotextile, the medium and coarse sand in the leveling sand layer will not be lost.

[0010] 2. In this utility model, when the rainfall intensity exceeds the infiltration capacity of the road surface, the surplus rainwater will flow laterally along the micro-slope. Through the setting of the micro-slope, multiple fish-scale weirs can form downward "steps" to form a series of barriers that can intercept sand particles. At the same time, the arc-shaped structure of the fish-scale weirs will "disperse" the concentrated large flow of water into countless small, evenly distributed water flows, reducing the impact of the water flow. Furthermore, the impact on the downstream fish-scale grooves forms a "water cushion" in the fish-scale grooves to absorb the impact force, thereby reducing the loss of fine particulate materials caused by the impact of the water flow. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a permeable brick-resistant sidewalk structure according to the present invention. Figure 2 This is a structural schematic diagram of the assembly module in this utility model.

[0012] In the diagram: 1. Roadbed; 2. Curbstone; 3. Impermeable geotextile; 4. Graded crushed stone layer; 5. Porous concrete layer; 6. Permeable geotextile; 7. Drainage ditch; 8. Drainage pipe; 9. Filter board; 10. Module; 11. Permeable brick; 12. Leveling sand layer; 13. Fish scale groove; 14. Fish scale weir. Detailed Implementation

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0014] This utility model embodiment provides a sidewalk structure that prevents water-permeable bricks from sinking, such as... Figure 1-2As shown, the roadbed includes a roadbed 1 and curb stones 2 on both sides of the roadbed 1. A drainage ditch 7 is set on the outer side of the curb stones 2 on the roadbed 1. The roadbed 1 is laid with impermeable geotextile 3, graded crushed stone layer 4, porous concrete layer 5, permeable geotextile 6, and prefabricated component layer in sequence from bottom to top. The graded crushed stone layer 4, porous concrete layer 5, permeable geotextile 6, and prefabricated component layer are inclined with a slight slope from the middle to both sides. The sidewall of the drainage ditch 7 is equipped with a filter plate 9 at the position corresponding to the graded crushed stone layer 4, which can ensure that rainwater infiltrating from the permeable geotextile 6 can quickly enter the drainage ditch 7 from the porous concrete layer 5. Several drainage pipes 8 are pre-embedded in the porous concrete layer 5 near the curbstone 2. The upper end of the drainage pipe 8 penetrates the permeable geotextile 6 and abuts against the lower side of the assembled component layer. The upper end of the drainage pipe 8 is set on a filter screen to prevent the loss of medium and coarse sand in the flat sand layer near the drainage pipe 8, so as to avoid the need for medium and coarse sand in the middle of the flat sand layer to fill the voids at the edge of the flat sand layer. The lower end of the drainage pipe 8 is connected to the drainage ditch 7. When the rainfall intensity exceeds the infiltration capacity of the road surface, the excess rainwater will form a transverse water flow at the leveling sand layer 12 on the slight slope, and be transported from the drainage pipe 8 to the drainage ditch 7 to avoid waterlogging caused by the accumulation of excess rainwater.

[0015] The assembly component layer includes an assembly module 10, permeable bricks 11, and a leveling sand layer 12. The assembly modules 10 are spliced ​​together and placed on the upper side of the permeable geotextile 6. Several assembly grooves are opened in the middle of the assembly module 10. A flow-reducing bottom plate is set on the lower side of the assembly groove. Several staggered fish-scale grooves 13 are opened on the flow-reducing bottom plate. A fish-scale weir 14 is set on the outer edge of the fish-scale grooves 13. The leveling sand layer 12 is filled in the lower part of the assembly groove. The permeable bricks 11 are placed in the upper part of the assembly groove with concave and convex fits. Rainwater can quickly infiltrate down the permeable geotextile 6 through the fish-scale grooves 13 along the permeable bricks 11 and the leveling sand layer 12, and form "small puddles" in the fish-scale grooves 13 to temporarily retain rainwater.

[0016] The assembly module 10 has crossflow slots 13 on both sides facing the curbstone 2. The crossflow slots 13 of several assembly modules 10 form a transverse flow channel, allowing excess rainwater to flow smoothly to both sides and be discharged from the drainage pipe 8. The excess rainwater falls at the fish scale weir 14 and is divided into countless small, evenly distributed water streams, which fall and impact the "small puddles" to absorb the impact and reduce the loss of fine particulate materials due to water flow impact.

[0017] Working principle: In this invention, the permeable geotextile 6 in the vertical direction acts as a filter for the medium and coarse stones of the leveling sand layer 12, preventing the loss of fine particles in the vertical direction. In addition, the fish-scale weir 14 will raise the water level in the middle, slowing down the water flow in front of the weir 14 and reducing the water flow's ability to carry sediment. The structure of the prefabricated component layer with the micro-slope design and the fish-scale weir 14 will cause rainwater to form "small puddles" in the fish-scale groove 13, which can be used to absorb the impact force generated by the excess rainwater flowing laterally and falling along the fish-scale weir 14, reducing the water flow and further reducing the potential energy of the rainwater, thus reducing the voids in the structural layer and road surface settlement caused by the impact of the water flow.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A subsidence-resistant pavement structure made of permeable bricks, comprising a roadbed and curb stones on both sides of the roadbed, wherein a drainage ditch is provided on the outer side of the curb stones of the roadbed, characterized in that: The roadbed is laid from bottom to top with the following layers: impermeable geotextile, graded crushed stone layer, porous concrete layer, permeable geotextile, and assembly component layer. The assembly component layer includes assembly modules, permeable bricks, and a leveling sand layer. The assembly modules are spliced ​​together and placed on the upper side of the permeable geotextile. Several assembly grooves are opened in the middle of the assembly module. Crossflow slots are opened on the two side walls of the assembly module facing the curb. A flow-reducing bottom plate is set on the lower side of the assembly groove. Several staggered fish-scale slots are opened on the flow-reducing bottom plate. Fish-scale weirs are set on the outer edge of the fish-scale slots. The leveling sand layer is filled in the lower part of the assembly groove. The permeable bricks are placed in a concave-convex fit on the upper part of the assembly groove.

2. The anti-sinking sidewalk structure made of permeable bricks according to claim 1, characterized in that: The graded crushed stone layer, porous concrete layer, permeable geotextile, and assembled component layer are provided with a slight slope from the middle to both sides.

3. The anti-sinking sidewalk structure made of permeable bricks according to claim 2, characterized in that: Several drainage pipes are pre-embedded in the porous concrete layer near the curb. The upper end of the drainage pipe penetrates the permeable geotextile, and the lower end of the drainage pipe is connected to the drainage ditch.

4. The anti-sinking sidewalk structure made of permeable bricks according to claim 3, characterized in that: The upper end of the drain pipe is set on the filter screen.

5. The anti-sinking sidewalk structure made of permeable bricks according to claim 4, characterized in that: The sidewalls of the drainage ditch are positioned on the filter plate corresponding to the graded crushed stone layer.

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