CN212688598U - Municipal administration rainwater infiltration road bed - Google Patents

Abstract

The utility model relates to a municipal rainwater infiltration roadbed, which comprises an original soil layer and a rammed soil layer, wherein a water permeable functional layer is paved upwards on the rammed soil layer; the water permeable functional layer comprises a loess layer, a small sandstone layer, a large sandstone layer, a reinforced drainage layer, a damping layer, a composite water permeable concrete layer and an asphalt pavement layer which are sequentially and upwards paved on a rammed soil layer; a reinforcing member is arranged on the rammed soil layer; the reinforced drainage layer is communicated with a drainage pipe communicated with a municipal sewage pipe; the bottom of the reinforced drainage layer is fixedly connected with a plurality of water guide pipes; the water guide pipe vertically and downwards sequentially penetrates through the large sandstone layer, the small sandstone layer, the loess layer and the tamped soil layer and extends into the original soil layer; a plurality of water guide holes for guiding rainwater to the original soil layer are formed in the circumferential direction of the water guide pipe section positioned at the upper part of the tamped soil layer; the water guide hole is fixedly connected with a filter body for preventing the water guide pipe from being blocked. The utility model discloses can make the rainwater permeate to former soil horizon fast, can avoid surface gathered water, have better drainage performance of permeating water.

Description

Municipal administration rainwater infiltration road bed

Technical Field

The utility model belongs to the technical field of the permeable pavement technique and specifically relates to a municipal administration rainwater infiltration road bed is related to.

Background

The permeable pavement has water permeability, and can quickly eliminate the road water accumulation phenomenon in rainy days; when the rainfall is concentrated, the burden of urban drainage facilities can be lightened, and the flooding of rivers and the water body pollution are prevented. Cities in Jiang Zhe are affected by subtropical monsoon, rainstorm is often encountered in summer, rainfall is large, road drainage difficulty often occurs, accumulated water even submerges roads, and traffic traveling is affected.

Notice CN206418364U discloses a roadbed structure permeates water, the graded rubble setting in the top on plain soil tamped layer, the stable rubble layer setting of water is in the top of graded rubble, it sets up the top at the stable rubble layer of water to hinder the root layer, the bottom surface of shock attenuation buffer board contacts with hindering the root layer, the bottom surface setting of ox felt layer is at the upper surface of shock attenuation buffer board, pitch road surface layer II sets up the top at ox felt layer, pitch road surface layer I sets up the top at pitch road surface layer II, the filter layer sets up the top at pitch road surface layer I, space concrete permeable bed sets up the top at the filter layer, it sets up the top at space concrete permeable bed to expose bone material permeable pavement, the glass silver sets up in the shock attenuation buffer board.

The above prior art solutions have the following drawbacks: when rainwater permeates to plain soil tamped layer, because of the soil layer through tamping, infiltration rate descends when rainwater flows to plain soil tamped layer, and when rainfall is too big, rainwater infiltration volume is less than the rainfall, and the rainwater gathers on plain soil tamped layer, leads to the condition of surface gathered water to appear, and the drainage performance of permeating water is relatively poor.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, one of the purposes of the utility model is to provide a municipal rainwater infiltration road bed, can make the rainwater permeate to native soil horizon fast, can avoid surface gathered water, have the better drainage waterlogging performance of permeating water.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: a municipal rainwater infiltration roadbed comprises an original soil layer and a tamped soil layer formed on the original soil layer, wherein a water-permeable functional layer is paved upwards on the tamped soil layer; the water permeable functional layer comprises a loess layer, a small sandstone layer, a large sandstone layer, a reinforced drainage layer, a damping layer, a composite water permeable concrete layer and an asphalt pavement layer which are sequentially and upwards paved on a rammed soil layer; reinforcing members positioned at two sides of the water permeable functional layer are arranged on the rammed soil layer; the reinforced drainage layer is communicated with a drainage pipe communicated with a municipal sewage pipe; the bottom of the reinforced drainage layer is fixedly connected with a plurality of water guide pipes; the water guide pipe vertically and downwards sequentially penetrates through the large sandstone layer, the small sandstone layer, the loess layer and the tamped soil layer and extends into the original soil layer; a plurality of water guide holes for guiding rainwater to the original soil layer are formed in the circumferential direction of the water guide pipe section positioned at the upper part of the tamped soil layer; the water guide hole is fixedly connected with a filter body for preventing the water guide pipe from being blocked.

By adopting the technical scheme, rainwater sequentially permeates the asphalt pavement layer and the composite pervious concrete layer and flows to the reinforced drainage layer, and part of rainwater is drained into the urban sewage pipe network through the drainage pipe, so that the water permeating and drainage performance of the utility model is improved; another part rainwater sees through reinforcing drainage blanket, and big gravel layer, little gravel layer and loess layer of flowing through in proper order flow through to rammed soil layer and permeate to former soil layer, and the direct flow to former soil layer of rainwater aqueduct need not pass through rammed soil layer during big gravel layer, little gravel layer and loess layer of flowing through, has promoted the rainwater to former soil layer permeation rate, effectively avoids the road surface ponding to appear.

The present invention may be further configured in a preferred embodiment as: the reinforced drainage layer comprises a plurality of drainage unit bodies in cuboid geometric shapes, and the drainage unit bodies are communicated with a drainage pipe; a first drainage gap is formed between the adjacent drainage unit bodies; a second drainage gap is formed between the drainage unit body and the reinforcing piece; a drainage pipeline is integrally formed in the drainage unit body, and the central axis of the drainage pipeline passes through the center of the drainage unit body and is parallel to the length direction of the drainage unit body; a plurality of water guide pipelines are integrally formed at the lower part of the drainage unit body along the length direction of the drainage unit body; the water guide pipeline is positioned at the lower part of the drainage pipeline and is communicated with the drainage pipeline; the central axis of the water guide pipeline is parallel to the width direction of the drainage unit body; the water guide pipelines between the adjacent drainage unit bodies are communicated with each other and the water guide pipelines of the drainage unit bodies are communicated with the upper part of the drainage pipe.

By adopting the technical scheme, a part of rainwater permeating to the reinforced drainage layer flows through the large sandstone layer, the small sandstone layer and the loess layer through the first drainage gap and the second drainage gap, flows to the tamped soil layer and permeates to the original soil layer, and can directly flow to the original soil layer through the water guide pipe when flowing through the large sandstone layer, the small sandstone layer and the loess layer without passing through the tamped soil layer, so that the permeation rate of the rainwater to the original soil layer is improved, and the water accumulation on a road surface is effectively avoided; another part rainwater flows through drainage pipe, water guide pipeline, drain pipe, finally is discharged into city sewage pipe network, can promote the utility model discloses a drainage performance.

The present invention may be further configured in a preferred embodiment as: a filter tank communicated with the water guide pipeline is integrally formed on the upper surface of the drainage unit body; the filter tank is filled with a filter felt layer.

Through adopting above-mentioned technical scheme for the rainwater is collected to the drain pipe more fast, effectively avoids the road surface ponding to appear.

The present invention may be further configured in a preferred embodiment as: the damping layer comprises a lower steel plate layer abutted against the upper surface of the reinforced drainage layer, an upper steel plate layer abutted against the lower surface of the composite permeable concrete layer and a rubber layer fixedly connected between the lower steel plate layer and the upper steel plate layer, and the width of the lower steel plate layer is 1.02-1.04 times of that of the rubber layer; the lower steel plate layer and the upper steel plate layer have the same structure; the lower steel plate layer penetrates through the upper surface and the lower surface and is provided with a plurality of water flow through grooves; the rubber layer penetrates through the upper surface and the lower surface and is provided with a through groove; a damping spring is arranged in the through groove; one end of the damping spring is abutted against the upper surface of the lower steel plate layer, and the other end of the damping spring is abutted against the lower surface of the upper steel plate layer.

By adopting the technical scheme, the deformation space of the rubber layer is reserved, the damage to the reinforcing member is reduced, and the overall durability is improved; damping spring and rubber layer combine to give the utility model discloses good anti-seismic performance avoids external effort to the destruction of reinforcing drainage blanket, has protected the structure of reinforcing drainage blanket, has ensured the utility model discloses a drainage performance of permeating water.

The present invention may be further configured in a preferred embodiment as: the reinforcement includes the butt in the perpendicular gusset plate of functional layer lateral wall of permeating water, fixed connection in perpendicular gusset plate bottom base and one end fixed connection in perpendicular gusset plate top lateral wall and other end fixed connection in the enhancement swash plate of functional layer department of permeating water dorsad on the subbase upper surface back.

Through adopting above-mentioned technical scheme, prevent that the functional layer that permeates water from taking place to collapse, promote the utility model discloses holistic durability.

The present invention may be further configured in a preferred embodiment as: grooves are formed in the side walls, facing the water permeable functional layer, of the two vertical reinforcing plates along the length direction of the vertical reinforcing plates; the linear distance between the two grooves is equal to the width of the lower steel plate layer; rubber protective sleeves are sleeved on two side edges of the shock absorption layer; the side wall of the groove is vertically provided with a plurality of mounting grooves downwards along the length direction of the vertical reinforcing plate; the distance between the adjacent mounting grooves is equal; the mounting groove is filled with a spring; one end of the spring is abutted against the bottom of the mounting groove, and the other end of the spring is abutted against the lower surface of the lower steel plate layer.

By adopting the technical scheme, the rubber protective sleeves protect the edges of the two sides of the shock absorption layer, so that the shock absorption layer is prevented from being damaged due to long-term stress action, and the durability of the shock absorption layer is improved; the spring plays the cushioning effect to the buffer layer, further strengthens holistic anti-seismic performance, promotes the utility model discloses a durability.

The present invention may be further configured in a preferred embodiment as: the composite pervious concrete layer comprises a plurality of pervious concrete layers and filter cloth layers laid between the pervious concrete layers, and the upper surface of the pervious concrete layer abutted against the lower surface of the asphalt pavement layer is polished to form a leveling layer.

Through adopting above-mentioned technical scheme, the filter cloth layer filters the impurity in the rainwater, reduces the destruction of impurity to the road bed, promotes the durability of road bed.

The present invention may be further configured in a preferred embodiment as: the filter body includes fixed connection in the fixed ring in water guide hole, and multilayer fixed connection filters the wire net and fills the filter layer between filtering the wire net in fixed ring inside.

By adopting the technical scheme, mineral particles positioned outside the water guide pipe can be prevented from blocking the water guide hole, rainwater can be guaranteed to smoothly flow to the original soil layer through the water guide pipe, and accumulated water on the road surface is avoided.

To sum up, the utility model discloses a following beneficial technological effect:

1. through former soil layer, tamped soil layer, the functional layer that permeates water, loess layer, little gravel layer, big gravel layer, reinforcing drainage blanket, buffer layer, the compound concrete layer that permeates water, pitch road surface layer, aqueduct and reinforcement, can make the rainwater permeate to former soil layer fast, can avoid surface gathered water, have better drainage of permeating water ability of permeating water.

2. The edges of the two sides of the shock absorption layer are protected through the rubber protective sleeves, the shock absorption layer is prevented from being damaged due to long-term stress action, and the durability of the shock absorption layer is improved; the spring plays the cushioning effect to the buffer layer, further strengthens holistic anti-seismic performance, promotes the utility model discloses a durability.

3. Through the water guide pipe, the water guide hole, the filter body, the fixed ring, the filtering steel wire mesh and the filtering layer, mineral particles positioned on the outer side of the water guide pipe can be prevented from blocking the water guide hole, rainwater can be guaranteed to flow to an original soil layer through the water guide pipe smoothly, and water accumulation on a road surface is avoided.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged partial schematic view of portion A of FIG. 1;

FIG. 3 is an enlarged partial schematic view of portion B of FIG. 1;

fig. 4 is a sectional view of the filter body along its axial bisecting plane.

In the figure, 1, the original soil layer; 10. tamping a soil layer; 100. a water permeable functional layer; 11. a loess layer; 12. a small sandstone layer; 13. a large sandstone layer; 2. a reinforced drainage layer; 20. a drain pipe; 21. a drainage unit body; 211. a first drainage void; 212. a second drainage void; 22. a water discharge pipeline; 23. a water guide pipeline; 24. a filter tank; 25. filtering the felt layer; 3. a shock-absorbing layer; 30. a rubber protective sleeve; 31. a lower steel plate layer; 311. a water flow through groove; 32. a rubber layer; 33. a steel plate layer is arranged; 34. a through groove; 35. a damping spring; 4. compounding a pervious concrete layer; 41. a pervious concrete layer; 42. a filter cloth layer; 43. leveling layer; 5. an asphalt pavement layer; 6. a water conduit; 61. a water guide hole; 62. a filter body; 621. fixing the circular ring; 622. filtering the steel wire mesh; 623. a filter layer; 7. a reinforcement; 71. erecting a reinforcing plate; 72. a bottom base; 73. a reinforced sloping plate; 74. a groove; 75. mounting grooves; 76. a spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the municipal rainwater infiltration roadbed disclosed by the utility model comprises an original soil layer 1, wherein the original soil layer 1 is tamped to form a tamped soil layer 10; the functional layer 100 that permeates water is laid upwards in rammed soil layer 10, and the functional layer 100 that permeates water is including upwards laying in proper order in rammed soil layer 10's loess layer 11, little grit layer 12, big grit layer 13, reinforcing drainage layer 2, buffer layer 3, compound concrete layer 4 and the bituminous paving layer 5 that permeates water. The rammed soil layer 10 is provided with reinforcing members 7 which are positioned at both sides of the water permeable functional layer 100 and are used for preventing the water permeable functional layer 100 from collapsing. The reinforced drainage layer 2 is communicated with a drainage pipe 20 communicated with a municipal sewage pipe; the bottom of the reinforced drainage layer 2 is fixedly connected with a plurality of water guide pipes 6.

Referring to fig. 1, the reinforcement member 7 includes a vertical reinforcement plate 71 abutting against the sidewall of the water permeable functional layer 100, and a bottom base 72 is fixedly connected to the bottom of the vertical reinforcement plate 71 opposite to the sidewall of the water permeable functional layer 100; the bottom base 72 is fixedly connected with a reinforced sloping plate 73, one end of the reinforced sloping plate 73 is fixedly connected to the top side wall of the vertical reinforcing plate 71, and the other end of the reinforced sloping plate 73 is fixedly connected to the position of the upper surface of the bottom base 72, which is opposite to the functional layer 100. The composite pervious concrete layer 4 includes a plurality of pervious concrete layers 41 and a filter cloth layer 42, preferably a bamboo charcoal fiber felt cloth, laid between the pervious concrete layers 41, and the upper surface of the pervious concrete layer 41 abutting against the lower surface of the asphalt pavement layer 5 is polished to form a leveling layer 43.

Referring to fig. 1 and 2, the aqueduct 6 is vertically and downwards sequentially provided with a large sand layer 13, a small sand layer 12, a loess layer 11 and a tamped soil layer 10 to extend into the original soil layer 1; a plurality of water guide holes 61 for guiding rainwater to the original soil layer 1 are formed in the circumferential direction of the pipe section of the water guide pipe 6 positioned at the upper part of the tamped soil layer 10. A filter 62 for preventing the water guide pipe 6 from being clogged is fixedly connected to the water guide hole 61. Referring to fig. 4, the filter body 62 includes a fixing ring 621 fixedly connected to the water guide hole 61, a plurality of layers of filtering steel meshes 622 fixedly connected to the inside of the fixing ring 621, and a filtering layer 623 filled between the filtering steel meshes 622, preferably a bamboo charcoal fiber felt.

Referring to fig. 1, the reinforced drainage layer 2 includes a plurality of drainage unit bodies 21 having a rectangular parallelepiped geometric shape, and the drainage unit bodies 21 are communicated with a drainage pipe 20; a first drainage gap 211 is formed between the adjacent drainage unit bodies 21; a second drainage gap 212 is formed between the drainage cell body 21 and the reinforcing member 7.

Referring to fig. 2, in conjunction with fig. 1, a drainage pipe 22 is integrally formed in the drainage unit body 21, and a central axis of the drainage pipe 22 passes through the center of the drainage unit body 21 and is parallel to the length direction of the drainage unit body 21; a plurality of water guide pipes 23 are integrally formed at the lower part of the drainage unit body 21 along the length direction of the drainage unit body 21; the water guide pipeline 23 is positioned at the lower part of the drainage pipeline 22 and is communicated with the drainage pipeline 22; the central axis of the water guide pipeline 23 is parallel to the width direction of the drainage unit body 21; the water guide pipes 23 between the adjacent water discharge unit bodies 21 are communicated with each other and the water guide pipes 23 of the water discharge unit bodies 21 are communicated with the upper portion of the water discharge pipe 20. In order to improve the drainage performance, a filtering groove 24 communicated with the water guide pipeline 23 is integrally formed on the upper surface of the drainage unit body 21; the filter tank 24 is filled with a filter felt layer 25, preferably a bamboo charcoal fiber felt.

Referring to fig. 3, with reference to fig. 1, the damping layer 3 includes a lower steel plate layer 31 abutting against the upper surface of the reinforced drainage layer 2, and an upper steel plate layer 33 abutting against the lower surface of the composite pervious concrete layer 4 and having the same structure as the lower steel plate layer 31, and a rubber layer 32, preferably neoprene rubber having good chemical resistance, is fixedly connected between the lower steel plate layer 31 and the upper steel plate layer 33; the width of the lower steel plate layer 31 is 1.02 times of the width of the rubber layer 32. In order to ensure water permeability, the lower steel deck 31 has a plurality of water flow through grooves 311 penetrating the upper and lower surfaces. In order to further improve the anti-seismic performance of the utility model, the rubber layer 32 is provided with a through groove 34 through the upper and lower surfaces; the through groove 34 is filled with a damping spring 35; one end of the damping spring 35 abuts against the upper surface of the lower steel plate layer 31 and the other end abuts against the lower surface of the upper steel plate layer 33.

Referring to fig. 3, in combination with fig. 1, the two vertical reinforcing plates 71 facing the side walls of the water permeable functional layer 100 are both provided with grooves 74 along the length direction of the vertical reinforcing plates 71; the linear distance between the two grooves 74 is equal to the width of the lower steel plate layer 31; rubber protective sleeves 30 are sleeved on two side edges of the damping layer 3; the side wall of the groove 74 is vertically provided with a plurality of mounting grooves 75 downwards along the length direction of the vertical reinforcing plate 71; the spacing between adjacent mounting slots 75 is equal; the mounting groove 75 is filled with a spring 76; one end of the spring 76 abuts against the bottom of the mounting groove 75 and the other end abuts against the lower surface of the lower steel plate layer 31.

Rainwater firstly permeates the asphalt pavement layer 5 and flows to the composite pervious concrete layer 4, and particle impurities in the rainwater are removed under the action of the bamboo charcoal fiber felt cloth and the pervious concrete layer 41; the rainwater passing through the composite pervious concrete layer 4 flows through the shock absorption layer 3 and flows to the reinforced drainage layer 2, and a part of the rainwater flows through the drainage pipeline 22, the water guide pipeline 23 and the drainage pipeline 20 and is finally discharged into an urban sewage pipe network, so that the drainage performance of the utility model can be improved; the other part of rainwater flows through the large gravel layer 13, the small gravel layer 12 and the loess layer 11 through the first drainage gap 211 and the second drainage gap 212 and flows to the tamped soil layer 10 to permeate to the original soil layer 1, and when the rainwater flows through the large gravel layer 13, the small gravel layer 12 and the loess layer 11, the rainwater can directly flow to the original soil layer 1 through the water guide 6 without passing through the tamped soil layer 10, so that the permeation rate of the rainwater to the original soil layer 1 is increased, and the water accumulation on the road surface is effectively avoided.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. The utility model provides a municipal administration rainwater infiltration road bed, includes former soil layer (1) and tamped soil layer (10) that form on former soil layer (1), its characterized in that: a water permeable functional layer (100) is laid upwards on the rammed soil layer (10); the water permeable functional layer (100) comprises a loess layer (11), a small sandstone layer (12), a large sandstone layer (13), a reinforced drainage layer (2), a damping layer (3), a composite water permeable concrete layer (4) and an asphalt pavement layer (5) which are sequentially and upwards laid on a rammed soil layer (10); the rammed soil layer (10) is provided with reinforcing members (7) positioned at two sides of the water permeable functional layer (100); the reinforced drainage layer (2) is communicated with a drainage pipe (20) communicated with a municipal sewage pipe; the bottom of the reinforced drainage layer (2) is fixedly connected with a plurality of water guide pipes (6); the water guide pipe (6) vertically and downwards penetrates through the large gravel layer (13), the small gravel layer (12), the loess layer (11) and the rammed soil layer (10) in sequence to extend into the original soil layer (1); a plurality of water guide holes (61) for guiding rainwater to the original soil layer (1) are formed in the circumferential direction of the pipe section of the water guide pipe (6) positioned at the upper part of the rammed soil layer (10); the water guide hole (61) is fixedly connected with a filter body (62) for preventing the water guide pipe (6) from being blocked.

2. A municipal rainwater infiltration road bed according to claim 1, wherein: the reinforced drainage layer (2) comprises a plurality of drainage unit bodies (21) which are in cuboid geometric shapes, and the drainage unit bodies (21) are communicated with a drainage pipe (20); a first drainage gap (211) is formed between the adjacent drainage unit bodies (21); a second drainage gap (212) is formed between the drainage unit body (21) and the reinforcing piece (7); a drainage pipeline (22) is integrally formed on the drainage unit body (21), and the central axis of the drainage pipeline (22) passes through the center of the drainage unit body (21) and is parallel to the length direction of the drainage unit body (21); a plurality of water guide pipes (23) are integrally formed at the lower part of the drainage unit body (21) along the length direction of the drainage unit body (21); the water guide pipeline (23) is positioned at the lower part of the drainage pipeline (22) and is communicated with the drainage pipeline (22); the central axis of the water guide pipeline (23) is parallel to the width direction of the drainage unit body (21); the water guide pipes (23) between the adjacent drainage unit bodies (21) are communicated with each other, and the water guide pipes (23) of the drainage unit bodies (21) are communicated with the upper part of the drainage pipe (20).

3. A municipal rainwater infiltration road bed according to claim 2, wherein: a filter tank (24) communicated with a water guide pipeline (23) is integrally formed on the upper surface of the drainage unit body (21); the filtering tank (24) is filled with a filtering felt layer (25).

4. A municipal rainwater infiltration road bed according to claim 1, wherein: the damping layer (3) comprises a lower steel plate layer (31) abutted to the upper surface of the reinforced drainage layer (2), an upper steel plate layer (33) abutted to the lower surface of the composite pervious concrete layer (4) and a rubber layer (32) fixedly connected between the lower steel plate layer (31) and the upper steel plate layer (33), and the width of the lower steel plate layer (31) is 1.02-1.04 times of that of the rubber layer (32); the lower steel plate layer (31) and the upper steel plate layer (33) have the same structure; the lower steel plate layer (31) penetrates through the upper surface and the lower surface and is provided with a plurality of water flow through grooves (311); the rubber layer (32) penetrates through the upper surface and the lower surface and is provided with a through groove (34); a damping spring (35) is arranged in the through groove (34); one end of the damping spring (35) is abutted against the upper surface of the lower steel plate layer (31) and the other end is abutted against the lower surface of the upper steel plate layer (33).

5. A municipal rainwater infiltration road bed according to claim 4, wherein: the reinforcing member (7) comprises a vertical reinforcing plate (71) abutted against the side wall of the water permeable functional layer (100), a bottom base (72) fixedly connected to the bottom of the vertical reinforcing plate (71) and back to the side wall of the water permeable functional layer (100), and a reinforcing inclined plate (73) with one end fixedly connected to the top side wall of the vertical reinforcing plate (71) and the other end fixedly connected to the upper surface of the bottom base (72) and back to the water permeable functional layer (100).

6. A municipal rainwater infiltration road bed according to claim 5, wherein: the side walls of the two vertical reinforcing plates (71) facing the water permeable functional layer (100) are provided with grooves (74) along the length direction of the vertical reinforcing plates (71); the linear distance between the two grooves (74) is equal to the width of the lower steel plate layer (31); rubber protective sleeves (30) are sleeved on two side edges of the shock absorption layer (3); the side wall of the groove (74) is vertically provided with a plurality of mounting grooves (75) downwards along the length direction of the vertical reinforcing plate (71); the distance between the adjacent mounting grooves (75) is equal; a spring (76) is filled in the mounting groove (75); one end of the spring (76) is abutted against the bottom of the mounting groove (75) and the other end is abutted against the lower surface of the lower steel plate layer (31).

7. A municipal rainwater infiltration road bed according to claim 1, wherein: the composite pervious concrete layer (4) comprises a plurality of pervious concrete layers (41) and filter cloth layers (42) laid between the pervious concrete layers (41), and the upper surface of the pervious concrete layer (41) abutted against the lower surface of the asphalt pavement layer (5) is polished to form a leveling layer (43).

8. A municipal rainwater infiltration road bed according to claim 1, wherein: the filtering body (62) comprises a fixed circular ring (621) fixedly connected to the water guide hole (61), and a plurality of layers of filtering steel wire meshes (622) fixedly connected to the inside of the fixed circular ring (621) and filtering layers (623) filled between the filtering steel wire meshes (622).

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