CN221218360U - Sponge urban road structure - Google Patents

Abstract

A sponge urban road structure comprises a central green belt, a motor vehicle lane and a pavement; a sinking green belt is arranged between the motor vehicle lane and the sidewalk; the sinking green belt comprises a planting soil layer and vegetation; the bottom of the planting soil layer is provided with a pebble layer; a drainage pipeline is buried in the pebble layer; drainage grooves are arranged in the planting soil layer at intervals; the bottom of the drainage groove is connected with a drainage pipeline; a filter screen is arranged in the drainage groove; a water permeable basket is arranged in the drainage groove and positioned above the drainage pipeline; a filtering sand layer is paved in the permeable basket; the top and the bottom of the filtering sand layer are respectively paved with filtering cloth; a water passing grate is arranged at the notch of the water draining groove; waterproof geotextile is paved on the outer side surface of the base layer; the upper end of waterproof geotechnical cloth extends to first breach department, and the lower extreme of waterproof geotechnical cloth extends to the bottom of first bed course. The utility model solves the technical problems that rainwater in the traditional traffic lanes and sidewalks is difficult to effectively drain into the green belt and accumulated water in the green belt is easy to permeate into the roadbed to damage the roadbed.

Description

Sponge urban road structure

Technical Field

The utility model belongs to the technical field of constructional engineering, and particularly relates to a sponge urban road structure.

Background

The region where a municipal road engineering is located is a coastal typhoon region (IV 7) in south China, and the region belongs to subtropical monsoon climate, is mild in climate, has sufficient rainfall and is mostly typhoon storm, high-temperature and rainy in summer and low-temperature and arid in winter. Therefore, in designing the road, high demands are made on the road structure, the structure of the road surface, and the function. The following problems generally exist in the current large multi-path structure: (1) Rainwater in a traffic lane and a sidewalk is difficult to effectively drain into a green belt, and water accumulation on the road surface is easy to cause. (2) The accumulated water in the green belt easily permeates into the roadbed, thereby damaging the roadbed. In order to solve the problems, the inventor designs a road structure suitable for the special environment of the project.

Disclosure of utility model

The utility model aims to provide a sponge urban road structure, which aims to solve the technical problems that rainwater in a traditional traffic lane and a pavement is difficult to effectively drain into a green belt, accumulated water on the pavement and accumulated water in the green belt are easy to permeate into a roadbed, and thus the roadbed is damaged.

In order to achieve the above purpose, the present utility model adopts the following technical scheme.

A sponge urban road structure comprises a central green belt, motor vehicle lanes and sidewalks which are sequentially arranged from the middle to the two sides; the motor vehicle lane comprises a first cushion layer, a bottom base layer, a base layer and a surface layer; the first cushion layer, the underlayment and the base layer are sequentially paved on the soil foundation from bottom to top, the outer side surface of the first cushion layer exceeds the outer side surface of the underlayment, and the outer side surface of the underlayment exceeds the outer side surface of the base layer; a first notch is reserved on the outer side of the top of the base layer along the longitudinal through length; a first dental seat is arranged in the first notch; the top surface of the first dental seat exceeds the top surface of the base layer, and a first mounting opening is reserved on the inner side of the top of the first dental seat along the longitudinal through length; A first curb is arranged in the first mounting opening; a sealing layer is paved on the top surface of the base layer at the inner side of the first tooth; the surface layer is paved on the top of the sealing layer, and the top surface of the surface layer is lower than the top surface of the first road tooth and is not lower than the top surface of the first road tooth seat; first water inlet openings are longitudinally arranged in the first curb at intervals at positions corresponding to the top surface of the surface layer; the sidewalk is arranged on the outer side of the motor vehicle lane, and a gap is reserved between the sidewalk and the motor vehicle lane; the pavement comprises a second cushion layer, a permeable concrete layer and a permeable brick layer which are sequentially arranged from bottom to top; the elevation of the top surface of the water permeable brick layer is adapted to the elevation of the top surface of the first road tooth, and the water permeable brick layer is bonded with the water permeable concrete layer through the cement mortar layer; The second cushion layer is paved on the top of the soil base, and the inner side surface of the second cushion layer exceeds the inner side surface of the permeable concrete layer; the elevation of the top surface of the soil base at the bottom of the second cushion layer is higher than that of the top surface of the soil base at the bottom of the first cushion layer; a second gap is reserved on the inner side of the top of the second cushion layer and the part exceeding the inner side surface of the permeable concrete layer along the longitudinal through length; a second curb seat is arranged in the second notch; the top surface of the second road tooth seat exceeds the top surface of the second cushion layer and is lower than the top surface of the permeable concrete layer; a second mounting opening is reserved on the outer side of the top of the second curb seat along the longitudinal through length; a second curb is arranged in the second mounting opening; the top surface of the second curb is flush with the top surface of the water permeable brick layer, and second water inlet openings are longitudinally arranged in the second curb at intervals at positions corresponding to the top surface of the second curb seat; A sinking green belt is arranged in the interval between the motor vehicle lane and the sidewalk; the sinking green belt comprises a planting soil layer and vegetation; the top surface of the planting soil layer is lower than the top surfaces of the first curb and the second curb; a pebble layer is arranged at the bottom of the planting soil layer; a drainage pipeline is buried in the pebble layer; drainage grooves are formed in the planting soil layer at intervals; the drainage groove is of a hexahedral structure with a top surface, and the periphery of the bottom of the drainage groove is respectively connected with a corresponding drainage pipeline; the adjacent drainage grooves are communicated through drainage pipelines; a filter screen is arranged in the drainage groove and near the top; a water permeable basket is arranged in the drainage groove and above the drainage pipeline; A filtering sand layer is paved in the permeable basket; filter cloth is respectively paved at the top and the bottom of the filter sand layer; a water passing grate is arranged at the notch of the water draining groove; waterproof geotextile is paved on the outer side surface of the base layer; the upper end of the waterproof geotechnical cloth extends to the first notch and is paved on the bottom surface of the first notch, and the lower end of the waterproof geotechnical cloth extends to the bottom of the first cushion layer.

Preferentially, the first cushion layer is formed by paving graded broken stone, and the thickness of the first cushion layer is not less than 15cm; the outer side surface of the first cushion layer is an inclined surface.

Preferably, the subbase layer and the base layer are both cement stable graded broken stone; wherein the thickness of the subbase layer is 20 cm-25 cm, and the thickness of the base layer is 36 cm-40 cm; the outer side surfaces of the underlayment and the base layer are inclined planes.

Preferably, the surface layer comprises a lower surface layer, a middle surface layer and an upper surface layer; the upper layer is made of fine-grain modified asphalt concrete, and the thickness of the upper layer is 4cm; the middle surface layer is made of middle grain type modified asphalt concrete, and the thickness of the middle surface layer is 6cm; the lower layer adopts coarse-grained asphalt concrete, and the thickness of the lower layer is 8cm; the sealing layer adopts emulsified asphalt slurry, and the thickness of the sealing layer is 0.8cm.

Preferably, the inner side surface of the second cushion layer is an inclined surface, and the slope of the inclined surface is 1:1.

Preferentially, the width of the waterproof geotextile paved at the bottom of the first notch is not less than 10cm; the width of the part of the waterproof geotextile paved at the bottom of the base layer is not less than 60cm.

Preferentially, the top surface of the planting soil layer is a concave arc surface, and two sides of the planting soil layer are respectively covered on the first tooth seat and the second tooth seat.

Compared with the prior art, the utility model has the following characteristics and beneficial effects.

1. According to the sponge urban road structure, the sunken green belt is arranged between the motor vehicle lane and the sidewalk, so that road runoff can be timely reduced, and a large amount of accumulated water on the road caused by storm is relieved; meanwhile, the sunk green belt utilizes water flowing in from the road surface to supplement soil water resource quantity and underground water resource quantity, thereby being beneficial to saving urban water.

2. The waterproof geotextile is paved on the outer side surface of the base layer; the upper end of the waterproof geotextile extends to the first notch, and the lower end of the waterproof geotextile extends to the bottom of the first cushion layer; the waterproof geotextile is arranged to separate the roadbed from the sunk green belt, so that water in the sunk green belt is prevented from entering the roadbed to damage the roadbed.

3. The utility model is provided with drainage grooves at intervals in the planting soil layer, and the periphery of the bottom of each drainage groove is respectively connected with a corresponding drainage pipeline; the adjacent drainage grooves are communicated through drainage pipelines; the drainage structure is arranged to guide out a large amount of accumulated water in the green belt; meanwhile, a filter screen is arranged in the drainage groove and near the top; a water permeable basket is arranged in the drainage groove and above the drainage pipeline; a filtering sand layer is paved in the permeable basket; filter cloth is respectively paved at the top and the bottom of the filter sand layer; and a water passing grate is arranged at the notch of the water draining groove. The design of the structures such as the water permeable basket, the filtering sand layer and the filtering cloth effectively intercepts mud and slag flowing into the drainage tank, and the blockage of the drainage pipeline at the bottom of the drainage tank is avoided.

Drawings

The utility model is described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic cross-sectional structure of the sponge urban road structure of the utility model.

Fig. 2 is a schematic cross-sectional structure of a motor vehicle lane in the present utility model.

Fig. 3 is a schematic cross-sectional structure of the sunk green belt of the present utility model.

Fig. 4 is a schematic view showing a structure in which a first tooth is provided on one side of a motor vehicle lane in the present utility model.

Fig. 5 is a schematic view showing a construction in which a second curb is provided on one side of a pavement in the present utility model.

Fig. 6 is a schematic view showing the internal structure of the drain tank in the present utility model.

Reference numerals: a-central green belt, B-motor vehicle lane, C-sidewalk, D-sinking green belt, 1-first cushion layer, 2-subbase layer, 3-basic layer, 4-surface layer, 5-soil base, 6-first notch, 7-first seat, 8-first mounting opening, 9-first curb, 10-seal layer, 11-first inlet, 12-second cushion layer, 13-permeable concrete layer, 14-permeable brick layer, 15-cement mortar layer, 16-second notch, 17-second curb seat, 18-second curb, 19-second mounting opening, 20-planting soil layer, 21-vegetation, 23-second inlet, 24-pebble layer, 25-drainage pipeline, 26-drainage tank, 27-filter screen, 28-permeable basket, 29-filter layer, 30-filter cloth, 31-water-filter grate, 32-waterproof geotechnical cloth.

Detailed Description

The road is an urban main road, the road surface of a motor vehicle lane and the road surface of a pavement are both straight-line type road arch crossslopes, the road surface crossslopes are 2.0%, the road flat curves are not provided with flat curve superhigh designs, and the pavement C is water-permeable pavement. The road surface design adopts the standard axle load as BZZ-100. The service life of the asphalt concrete pavement design is 15 years. The road cross section arrangement of the project is determined according to the road grade, the current road situation, the planned section, the traffic function, the land use and other factors.

As shown in fig. 1 to 6, the sponge urban road structure comprises a central green belt a, a motor vehicle lane B and a pavement C which are sequentially arranged from the middle to the two sides; the motor vehicle lane B comprises a first cushion layer 1, a bottom base layer 2, a base layer 3 and a surface layer 4; the first bedding layer 1, the underlayment 2 and the base layer 3 are sequentially paved on the soil foundation 5 from bottom to top, the outer side surface of the first bedding layer 1 exceeds the outer side surface of the underlayment 2, and the outer side surface of the underlayment 2 exceeds the outer side surface of the base layer 3; a first notch 6 is reserved on the outer side of the top of the base layer 3 along the longitudinal through length; a first dental seat 7 is arranged in the first notch 6; the top surface of the first dental seat 7 exceeds the top surface of the base layer 3, and a first mounting opening 8 is reserved on the inner side of the top of the first dental seat 7 along the longitudinal through length; A first tooth 9 is arranged in the first mounting opening 8; an sealing layer 10 is laid on the top surface of the base layer 3 on the inner side of the first curb 9; the surface layer 4 is paved on the top of the seal layer 10, and the top surface of the surface layer 4 is lower than the top surface of the first tooth 9 and is not lower than the top surface of the first tooth seat 7; first water inlet openings 11 are longitudinally arranged in the first teeth 9 at intervals at positions corresponding to the top surface of the surface layer 4; the pavement C is arranged on the outer side of the motor vehicle lane B, and a space is reserved between the pavement C and the motor vehicle lane B; the pavement C comprises a second cushion layer 12, a permeable concrete layer 13 and a permeable brick layer 14 which are sequentially arranged from bottom to top; the elevation of the top surface of the water permeable brick layer 14 is matched with the elevation of the top surface of the first tooth 9, and the water permeable brick layer 14 is bonded with the water permeable concrete layer 13 through the cement mortar layer 15; The second cushion layer 12 is paved on the top of the soil base 5, and the inner side surface of the second cushion layer 12 exceeds the inner side surface of the permeable concrete layer 13; the elevation of the top surface of the soil base 5 at the bottom of the second cushion layer 12 is higher than that of the top surface of the soil base 5 at the bottom of the first cushion layer 1; a second gap 16 is reserved on the inner side of the top of the second cushion layer 12 and the part beyond the inner side surface of the permeable concrete layer 13 along the longitudinal through length; a second ballast seat 17 is arranged in the second notch 16; the top surface of the second road shoe 17 exceeds the top surface of the second cushion layer 12 and is lower than the top surface of the permeable concrete layer 13; a second mounting opening 19 is reserved on the outer side of the top of the second curb seat 17 along the longitudinal through length; A second curb 18 is mounted in the second mounting opening 19; the top surface of the second curb 18 is flush with the top surface of the water permeable brick layer 14, and second water inlet 23 is longitudinally arranged in the second curb 18 at intervals at the position corresponding to the top surface of the second curb seat 17; a sinking green belt D is arranged in the interval between the motor vehicle lane B and the sidewalk C; the sinking green belt D comprises a planting soil layer 20 and vegetation 21; the top surface of the planting soil layer 20 is lower than the top surfaces of the first road tooth 9 and the second road tooth 18; a pebble layer 24 is arranged at the bottom of the planting soil layer 20; a drainage pipeline 25 is buried in the pebble layer 24; a drainage groove 26 is arranged in the middle of the planting soil layer 20; The inlet for stom water of the water drainage tank 26 adopts an overflow type inlet for stom water, and the overflow type inlet for stom water is matched with open kerbstone; the drainage groove 26 is of a hexahedral structure with a top surface being short, and the periphery of the bottom of the drainage groove 26 is respectively connected with a corresponding drainage pipeline 25; the adjacent drainage grooves 26 are communicated through a drainage pipeline 25; the drainage pipeline 25 is communicated with the current river channel, and rainwater is discharged into the river channel; a filter screen 27 is arranged in the drain tank 26 near the top; a water permeable basket 28 is arranged in the drain tank 26 and above the drain pipeline 25; a filtering sand layer 29 is paved in the water permeable basket 28; filter cloths 30 are respectively laid on the top and the bottom of the filter sand layer 29; A water passing grate 31 is arranged at the notch of the water draining groove 26; a waterproof geotextile 32 is paved on the outer side surface of the base layer 3; the upper end of the waterproof geotechnical cloth 32 extends to the first notch 6 and is paved on the bottom surface of the first notch 6, and the lower end of the waterproof geotechnical cloth 32 extends to the bottom of the first cushion layer 1.

In this embodiment, the side close to the road center line is the inner side, and the side far from the road center line is the outer side. The road cross section of the planning scheme is arranged as follows: the width of the non-motor vehicle lane and the sidewalk is 5.0m, and the width of the sinking green belt D is 2.5m; the width of the motor lane B is 11.5m; the width of the central green belt a is 2m.

In this embodiment, the first cushion layer 1 is formed by paving graded broken stone, and the thickness of the first cushion layer 1 is not less than 15cm; the outer side surface of the first cushion layer 1 is an inclined surface, and the slope of the inclined surface is 1:1.

In this embodiment, the subbase layer 2 and the base layer 3 are both cement stabilized graded broken stone; wherein the thickness of the subbase layer 2 is 20 cm-25 cm, and the thickness of the base layer 3 is 36 cm-40 cm; the outer side surfaces of the base layer 2 and the base layer 3 are inclined planes, and the slopes of the inclined planes are 1:1.

In this embodiment, the surface layer 4 includes a lower surface layer 4.1, a middle surface layer 4.2.2 and an upper surface layer 4.3; the upper layer 4.3 adopts SBS fine particle type modified asphalt concrete (AC-13C), and the thickness of the upper layer 4.3 is 4cm; the middle surface layer 4.2.2 adopts middle particle type modified asphalt concrete (AC-20C), and the thickness of the middle surface layer 4.2.2 is 6cm; the lower layer 4.1 adopts coarse-grained asphalt concrete (AC-25C), and the thickness of the lower layer 4.1 is 8cm; the sealing layer 10 adopts (ES-3) emulsified asphalt slurry, and the thickness of the sealing layer 10 is 0.8cm; the base layer 3 adopts 5% cement stabilized macadam, and the thickness of the base layer 3 is 36cm; the subbase layer 2 adopts 4% cement stabilized macadam, and the thickness of the subbase layer 2 is 20cm.

As the engineering route serves industrial areas and residential areas along the line, the number of heavy vehicles and extra heavy vehicles for walking is large, the road performance and the later maintenance factors are comprehensively considered, and the SBS modified asphalt concrete AC-13C pavement is recommended to be adopted, namely: the road adopts fine-grain SBS modified asphalt concrete (AC-13C) 4 cm+medium-grain modified asphalt concrete (AC-20C) 6 cm+coarse-grain asphalt concrete (AC-25C) 8cm. SBS modified asphalt concrete AC-13: the AC-13 asphalt concrete is a close-graded asphalt concrete mixture, and has good high-temperature resistance, crack resistance and better durability. The AC asphalt concrete has wide application range and can be applied to any level of road asphalt surface layers at all levels. SBS is a block copolymer of styrene butadiene styrene, belongs to thermoplastic rubber, has excellent low-temperature performance, and when the mixing amount of SBS reaches about 12%, SBS rubber in modified asphalt is in a continuous phase, so after SBS is mixed with asphalt, the original asphalt waterproof reliability is still maintained, the low-temperature brittleness of asphalt is greatly improved, and the rubber characteristics of elasticity, flexibility, ductility, adhesiveness, weather resistance and the like of the rubber are maintained. Compared with SMA-13 asphalt concrete material, the AC-13 asphalt concrete material has rich raw materials, low cost and mature construction process.

In this embodiment, the inner side surface of the second cushion layer 12 is an inclined surface, and the slope of the inclined surface is 1:1.

In this embodiment, the width of the waterproof geotextile 32 laid at the bottom of the first notch 6 is not less than 10cm; the width of the part of the waterproof geotextile 32 paved at the bottom of the base layer 3 is not less than 60cm.

In this embodiment, the top surface of the planting soil layer 20 is a concave arc surface, and two sides of the planting soil layer 20 are respectively covered on the first track tooth seat 7 and the second track tooth seat 17.

In this embodiment, the bottom surface of planting soil layer 20 is lower than the bottom surface of subbase 2, the top surface of planting soil layer 20 is concave arcwall face down, and the both sides of planting soil layer 20 cover respectively on first way tooth seat 7 and second way tooth seat 17, and the lateral surface lower part of planting soil layer 20 is the inclined plane, and the slope of inclined plane is 1:0.15; the pebble layer 24 has a thickness of not less than 30cm. The thickness of the planting soil layer 20 was 80cm.

In this embodiment, the first curb 9 is formed by longitudinally splicing a group of curb blocks, the width of the curb blocks is 15cm, the length of the curb blocks is 49.5cm, and the height of the curb blocks is 30cm; the width of the first curb seat 7 is 30cm, and the top surface of the first curb seat 7 is lower than the top surface of the first curb 9; the inner side surface of the first tooth 9 is vertically flush with the inner side surface of the first tooth seat 7, and the outer side surface of the first tooth seat 7 exceeds the outer side surface of the first tooth 9; an inclined plane is arranged on the outer side of the top of the first dental seat 7, and the slope of the inclined plane is 1:1.

The sunk green belt D of the present utility model comprises: 200mm of water storage space, and the reduction coefficient is 0.9; the porosity of the planting soil layer is 15%, and the reduction coefficient is 0.6; the pebble layer 22 had a porosity of 20% and a reduction factor of 0.2.

The above embodiments are not exhaustive of the specific embodiments, and other embodiments are possible, and the above embodiments are intended to illustrate the present utility model, not to limit the scope of the present utility model, and all applications that come from simple variations of the present utility model fall within the scope of the present utility model.

Claims (7)

1. A sponge urban road structure comprises a central green belt (A), motor vehicle lanes (B) and sidewalks (C) which are sequentially arranged from the middle to the two sides; the motor vehicle lane (B) comprises a first cushion layer (1), a bottom base layer (2), a base layer (3) and a surface layer (4); the first cushion layer (1), the underlayment (2) and the base layer (3) are sequentially paved on the soil base (5) from bottom to top, the outer side surface of the first cushion layer (1) exceeds the outer side surface of the underlayment (2), and the outer side surface of the underlayment (2) exceeds the outer side surface of the base layer (3); the method is characterized in that: a first notch (6) is reserved on the outer side of the top of the base layer (3) along the longitudinal through length; A first dental seat (7) is arranged in the first notch (6); the top surface of the first dental seat (7) exceeds the top surface of the base layer (3), and a first mounting opening (8) is reserved on the inner side of the top of the first dental seat (7) along the longitudinal through length; a first tooth (9) is arranged in the first mounting opening (8); a sealing layer (10) is paved on the top surface of the base layer (3) at the inner side of the first tooth (9); the surface layer (4) is paved on the top of the sealing layer (10), and the top surface of the surface layer (4) is lower than the top surface of the first tooth (9) and is not lower than the top surface of the first tooth seat (7); first water inlet (11) is longitudinally arranged in the first tooth (9) at intervals at the position corresponding to the top surface of the surface layer (4); The sidewalk (C) is arranged on the outer side of the motor vehicle lane (B), and a gap is reserved between the sidewalk (C) and the motor vehicle lane (B); the pavement (C) comprises a second cushion layer (12), a permeable concrete layer (13) and a permeable brick layer (14) which are sequentially arranged from bottom to top; the elevation of the top surface of the water permeable brick layer (14) is matched with the elevation of the top surface of the first tooth (9), and the water permeable brick layer (14) is bonded with the water permeable concrete layer (13) through the cement mortar layer (15); the second cushion layer (12) is paved on the top of the soil base (5), and the inner side surface of the second cushion layer (12) exceeds the inner side surface of the permeable concrete layer (13); The elevation of the top surface of the soil base (5) at the bottom of the second cushion layer (12) is higher than that of the top surface of the soil base (5) at the bottom of the first cushion layer (1); a second gap (16) is reserved on the inner side of the top of the second cushion layer (12) and the part exceeding the inner side surface of the permeable concrete layer (13) along the longitudinal through length; a second curb seat (17) is arranged in the second notch (16); the top surface of the second road tooth seat (17) exceeds the top surface of the second cushion layer (12) and is lower than the top surface of the permeable concrete layer (13); a second mounting opening (19) is reserved on the outer side of the top of the second curb seat (17) along the longitudinal through length; a second curb (18) is arranged in the second mounting opening (19); the top surface of the second curb (18) is flush with the top surface of the water permeable brick layer (14), and second water inlet openings (23) are longitudinally arranged in the second curb (18) at intervals at positions corresponding to the top surface of the second curb seat (17); a sinking green belt (D) is arranged in the interval between the motor vehicle lane (B) and the sidewalk (C); the sinking green belt (D) comprises a planting soil layer (20) and vegetation (21); the top surface of the planting soil layer (20) is lower than the top surfaces of the first road tooth (9) and the second road tooth (18); a pebble layer (24) is arranged at the bottom of the planting soil layer (20); a drainage pipeline (25) is buried in the pebble layer (24); A drainage groove (26) is arranged in the middle of the planting soil layer (20); the drainage groove (26) is of a hexahedral structure with a top surface lacking, and the periphery of the bottom of the drainage groove (26) is respectively connected with the corresponding drainage pipeline (25); the adjacent drainage grooves (26) are communicated through drainage pipelines (25); a filter screen (27) is arranged in the drainage groove (26) and near the top; a water permeable basket (28) is arranged in the drainage groove (26) and above the drainage pipeline (25); a filtering sand layer (29) is paved in the permeable basket (28); filter cloths (30) are respectively laid at the top and the bottom of the filter sand layer (29); A water passing grate (31) is arranged at the notch of the water draining groove (26); a waterproof geotextile (32) is paved on the outer side surface of the base layer (3); the upper end of the waterproof geotechnical cloth (32) extends to the first notch (6) and is paved on the bottom surface of the first notch (6), and the lower end of the waterproof geotechnical cloth (32) extends to the bottom of the first cushion layer (1).

2. The sponge urban road structure as claimed in claim 1, wherein: the first cushion layer (1) is formed by paving graded broken stone, and the thickness of the first cushion layer (1) is not less than 15cm; the outer side surface of the first cushion layer (1) is an inclined surface.

3. The sponge urban road structure as claimed in claim 1, wherein: the subbase layer (2) and the base layer (3) are both cement stable graded broken stones; wherein the thickness of the subbase layer (2) is 20 cm-25 cm, and the thickness of the base layer (3) is 36 cm-40 cm; the outer side surfaces of the subbase layer (2) and the base layer (3) are inclined planes.

4. The sponge urban road structure as claimed in claim 1, wherein: the surface layer (4) comprises a lower surface layer (4.1), a middle surface layer (4.2) and an upper surface layer (4.3); the upper layer (4.3) is made of fine-grain modified asphalt concrete, and the thickness of the upper layer (4.3) is 4cm; the middle surface layer (4.2) is made of medium grain modified asphalt concrete, and the thickness of the middle surface layer (4.2) is 6cm; the lower layer (4.1) adopts coarse-grained asphalt concrete, and the thickness of the lower layer (4.1) is 8cm; the sealing layer (10) adopts emulsified asphalt slurry, and the thickness of the sealing layer (10) is 0.8cm.

5. The sponge urban road structure as claimed in claim 1, wherein: the inner side surface of the second cushion layer (12) is an inclined surface, and the slope of the inclined surface is 1:1.

6. The sponge urban road structure as claimed in claim 1, wherein: the width of the waterproof geotextile (32) paved at the bottom of the first notch (6) is not less than 10cm; the width of the part of the waterproof geotextile (32) paved at the bottom of the base layer (3) is not less than 60cm.

7. The sponge urban road structure as claimed in claim 1, wherein: the top surface of the planting soil layer (20) is a concave arc surface, and two sides of the planting soil layer (20) are respectively covered on the first dental seat (7) and the second dental seat (17).