CN110725171A

CN110725171A - Sponge layered road greening construction method

Info

Publication number: CN110725171A
Application number: CN201910845607.2A
Authority: CN
Inventors: 胡正勤; 惠立新; 桑祖存
Original assignee: Jiangsu Xingye Environment Group Co Ltd
Current assignee: Jiangsu Xingye Environment Group Co Ltd
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2020-01-24

Abstract

The invention relates to the technical field of urban road greening construction, in particular to a sponge level type road greening construction method, which comprises the following steps: step one, planning a road surface; constructing a side dividing belt and a central dividing belt; step three, configuring plants; step four, greening design of the central separation belt; fifthly, designing the greening of the side sub-belts; step six, greening design of the sidewalk; wherein: in the first step: the cross section of the road surface is arranged in four ways. The invention achieves the purposes of effectively reducing the condition of water accumulated on the road surface, relieving the peak pressure of a drainage system, simultaneously effectively reducing the damage and influence caused by disasters such as urban flood waterlogging and the like, exerts the functions of purifying urban water resources, reducing water pollution, replenishing underground water and the like, greatly improves the practicability of the water resources in China, reduces the consumption and waste of the water resources, protects the natural ecological environment in China, and scientifically and reasonably controls the road rainwater.

Description

Sponge layered road greening construction method

Technical Field

The invention relates to the technical field of urban road greening construction, in particular to a sponge level type road greening construction method.

Background

With the development of urban construction and the enlargement of urban scale, a large amount of hardened ground weakens the penetration of rainwater, and a flood peak is easily formed when the rainfall is large in rainy season, so that water is accumulated in partial areas of the city; the urban heat island effect and the greenhouse effect are aggravated, and the extreme meteorological conditions and the extreme hydrological conditions are increased.

Urban roads are important components of urban space and occupy important positions in urban construction, and in the process of increasingly accelerating urbanization, the road area is increased continuously, and the hardened road area occupies about 15-20% of the urban construction land area. The rainwater quantity collected in the road subgrade range is considerable, the resources can not be effectively utilized at present, if the novel pavement material and the rainwater on-site infiltration storage and utilization mode can be researched aiming at the water utilization characteristics of green belts on the basis of the existing research on direct utilization and indirect utilization of rainwater, the road runoff is collected nearby to serve as the supplement water source of underground water and roadside green belts, and the method has very important significance for promoting low-influence development and construction.

At present in urban road construction process to satisfy urban road function as the purpose, mainly embodied "arrange" in rainwater control and utilization thinking, neglected the influence to ecological protection and environment, and the major defect has: 1. road rainwater directly enters a river channel through a municipal drainage pipe network, and the green land of the road cannot effectively retain rainwater and cannot supplement underground water; 2. the green belt can not effectively store rainwater, and a large amount of tap water is consumed every year because frequent irrigation and greening become large consumers for road water, so that the current situation of serious shortage of water resources in China is aggravated; 3. the surface runoff is greatly increased in rainy season, so that flood disasters are caused; 4. in rainy season, surface water drainage is not smooth, accumulated water on the road surface is serious, and the surface layer is wet and slippery, so that traffic accidents are caused.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a sponge level type road greening construction method, which achieves the purposes of effectively reducing the condition of surface water accumulation and relieving the peak pressure of a drainage system, simultaneously effectively reduces the damage and influence caused by disasters such as urban flood waterlogging and the like, plays the functions of purifying urban water resources, reducing water pollution, replenishing underground water and the like, greatly improves the practicability of the water resources in China, reduces the consumption and waste of the water resources, protects the natural ecological environment in China, and scientifically and reasonably controls the road rainwater.

(II) technical scheme

In order to realize the technical problem, the invention provides the following technical scheme: a construction method for sponge level road greening comprises the following steps:

step one, planning a road surface; constructing a side dividing belt and a central dividing belt; step three, configuring plants; step four, greening design of the central separation belt; fifthly, designing the greening of the side sub-belts; step six, greening design of the sidewalk; wherein:

in the first step: the cross section of the road surface is arranged in four ways: mainly comprises 4m sidewalks, 2m side sub-belts, 11.5m motor vehicle lanes, 3m central sub-belts, 11.5m motor vehicle lanes, 2m side sub-belts and 4m sidewalks, and the total width of the road is 38 m.

In the second step: the construction process of the side dividing belt and the central dividing belt mainly comprises the following steps:

and S1, excavating the foundation pit, namely excavating the foundation pit with the depth of five meters by using an excavator.

S2, building a reservoir, wherein the reservoir is a concrete-poured rectangular reservoir, the wall thickness is 0.25M, the lining material is M7.5 cement mortar, the surface layer is plastered by M10 cement mortar, the bottom of the reservoir is shaped like a pot bottom, the C15 concrete is embedded into the bottom, the mixing is required to be uniform, the pouring is mechanically vibrated, the compactness and flatness are achieved, the thickness is 0.1-0.2M, and the surface is plastered by M10 cement mortar.

S3, building the rainwater planting ditch, wherein the bottom of the ditch can be a slope bottom or a flat bottom, and the ditch is provided with an inclined transverse slope and a moderate longitudinal slope.

S4, paving the rainwater planting ditch in a water-permeable way, paving a master layer of fifty centimeters at the bottom of the rainwater planting ditch, wherein the porosity is 35-45%, the effective pore diameter is more than or equal to 80%, then burying the porous pipe in the middle of the master layer, paving a confluence layer of thirty centimeters at the back, and finally, paving the planting layer.

In step three: the plant configuration firstly considers the adaptability of the plants to moist soil, the moisture-proof plants capable of bearing 24-48h of waterlogging in rainy season are selected as much as possible, the native plants are selected as much as possible, the survival capability of the plants under extreme conditions of low temperature in winter, even frozen soil and the like is considered, and finally the collocation of the posture, the color, the texture, the flowering phase and the size of the plants is comprehensively considered to form the road landscape with bright color.

In step four: because the central partition is 3m, arbors, tree-planting shrubs and herbaceous plants are combined, multi-level composition is realized, plant communities are enriched, beautiful ceiba is selected as a main basis to regulate tree species for planting, and meanwhile, the shrubs are planted by alternately planting oleander and Brazil stauntonvine in consideration of the ecological effect of road greening.

In the fifth step: because the lateral zone is 2m, the ecological effect of road greening is considered, the arbor species are planted with the fireworks, the spacing is 6m, 1 big safflower is planted among the arbors at intervals, and the allamanda cathartica is planted on the periphery.

In the sixth step: the green belt of the sidewalk adopts the isolated and transparent open type planting, the trees planted in the sidewalk are planted with the mangoes of the evergreen tree species at intervals of 6m, and the radix ophiopogonis is planted below each mango.

Furthermore, fifty centimeters of coarse sand needs to be paved at the bottom of the foundation pit, and twenty centimeters of fine sand needs to be paved at the top of the coarse sand.

Further, the confluence layer in the second step is cobblestones.

Furthermore, in the second step, the planting layer is mainly formed by mixing 20% of fine sand into planting soil, the number of arbors is more than or equal to 1.2m, the number of shrubs is more than or equal to 0.9m, and the porosity is 25% -35%.

Further, in the fourth step, the planting shrubs are selected from one of the red flower juniper or the golden banyan, and the height from the top surfaces of the planting shrubs to the road surface cannot be higher than 0.7m in a green area within a distance of 15-30m from the end of the green belt.

The invention also provides a sponge layered road which comprises a road part, a vehicle-dividing part and a side slope part, wherein the road part comprises a plain soil layer, an ash layer, a cobblestone water storage layer, a permeable concrete layer, a permeable surface layer and a water storage channel, the top of the plain soil layer is the ash layer, the cobblestone water storage layer is positioned at the top of the ash layer, the permeable concrete layer is positioned at the top of the cobblestone water storage layer, the permeable surface layer is positioned at the top of the permeable concrete layer, the water storage channel is positioned at one side of the cobblestone water storage layer, and the water storage channel is communicated with the cobblestone water storage layer.

The branch vehicle belt part comprises a planting layer, a converging layer, a stone layer, a perforated pipe, a reservoir, a water pump, a water pumping pipe, a road tooth and a spray head, the reservoir is positioned at the top of the plain soil layer, the stone layer is positioned at the top of the reservoir, the water storage ditch is communicated with the reservoir, an overflow pipe is arranged on the reservoir, one end of the overflow pipe is communicated with the urban drainage network, the porous pipe is positioned inside the stone layer, the confluence layer is positioned at the top of the boulder layer, the planting layer is positioned at the top of the confluence layer, the water inlet end of the water pump is fixedly communicated with one side of the bottom of the reservoir, the water outlet end of the water pump is fixedly communicated with one end of the water pumping pipe, the two road teeth are respectively positioned at the two sides of the vehicle separating belt, one side that the way tooth carried on the back mutually is connected with one side fixed connection of shower nozzle twice, the other end of drinking-water pipe and the end fixed intercommunication of intaking of shower nozzle.

The slope part comprises a soil foundation, a water-permeable base layer, a leveling layer and a water-permeable surface, wherein the soil foundation is located at the top of a plain soil layer, the water-permeable base layer is located at the top of the soil foundation, the leveling layer is located at the top of the water-permeable base layer, the top of the leveling layer is the water-permeable surface, and the water-permeable surface is a water-permeable floor tile.

(III) advantageous effects

The invention provides a sponge layered road greening construction method, which has the following beneficial effects:

1. in the planting process of green plants, the rainwater planting ditch is built, so that the condition of surface water accumulation is effectively reduced, the flood peak pressure of a drainage system is relieved, rainwater is naturally collected through the design of peripheral slope during rainfall to achieve the effect of short-time water storage, and the rainwater permeates to the underground through soil and has the effects of purifying and filtering the rainwater.

2. The invention effectively reduces the damage and influence caused by disasters such as urban flood waterlogging, exerts the functions of purifying urban water resources, reducing water pollution, replenishing underground water and the like, greatly improves the practicability of the water resources in China, reduces the consumption and waste of the water resources, protects the natural ecological environment in China, scientifically and reasonably controls the road rainwater, and effectively promotes the development of cities in China.

3. The road greening method provided by the invention can improve the survival rate of green plants, and in case of raining, the planting layer and the green plants can absorb rainwater falling on the planting layer and the green plants, and in case of large rainfall, redundant rainwater can enter the reservoir through the planting layer for storage, so that the water storage capacity of a green belt is increased, the condition that the rainwater easily overflows from the planting layer to cause that the rainwater cannot normally enter the ground in case of large rainfall is reduced, meanwhile, sufficient moisture can be provided for the green plants in dry seasons, the condition that the moisture in the planting layer is easily consumed is reduced, and the condition that additional manual watering is needed for the green plants is reduced.

4. According to the invention, due to the arrangement of the water pump and the spray head, the water stored in the reservoir is extracted by the water pump, and is sprayed out by the spray head, so that rainwater can be fully utilized to spray water on the road surface, the working times of a sprinkler are reduced, and the obvious saving effect on water resources is achieved.

5. The invention can comprehensively exert natural ecological function and artificial intervention function, effectively control rainwater runoff, be beneficial to restoring urban water ecology and conserving water resources, enhance urban waterlogging prevention capability, improve novel urbanization quality and promote harmonious development of human and nature.

Drawings

FIG. 1 is a flow chart of steps of the greening construction method of the present invention;

FIG. 2 is a schematic structural diagram of a sponge-level road according to the present invention.

In the figure: 1. a plain soil layer; 2. a grey soil layer; 3. a cobblestone aquifer; 4. a pervious concrete layer; 5. a water permeable facing; 6. a water storage trench; 7. planting a layer; 8. a sink layer; 9. a major stone layer; 10. a perforated pipe; 11. a reservoir; 12. a water pump; 13. a water pumping pipe; 14. a road tooth; 15. a spray head; 16. soil foundation; 17. a water permeable base layer; 18. leveling layer; 19. and (4) water permeability.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: a construction method for sponge level road greening comprises the following steps:

s1, excavating the foundation pit with the depth of five meters by using an excavator, paving fifty centimeters of coarse sand at the bottom of the foundation pit, and paving twenty centimeters of fine sand at the top of the coarse sand.

S3, building the rainwater planting ditch, wherein the bottom of the ditch can be a slope bottom or a flat bottom, and the ditch is provided with an inclined transverse slope and a moderate longitudinal slope. Stranded rainwater is gathered into through vertical side slope and is planted the ditch bottom, and the one side of ditch is planted to the flow direction under the effect of horizontal side slope simultaneously, makes things convenient for gathering of rainwater, and final rainwater is planted the ditch and is purified the dirty surface runoff of log through the biological purification process of self to guarantee underground water source's pureness.

S4, paving the rainwater planting ditch in a water-permeable way, firstly paving a master layer with a porosity of 35% -45% and an effective pore diameter of more than or equal to 80% at the bottom of the rainwater planting ditch, then burying a porous pipe in the middle of the master layer, then paving a confluence layer with a porosity of thirty centimeters, wherein the confluence layer is cobblestones, and finally is a planting layer, the planting layer mainly comprises planting soil doped with 20% of fine sand, arbor is more than or equal to 1.2m, shrub is more than or equal to 0.9m, and the porosity is 25% -35%.

In step four: because the central partition is provided with 3m, arbors, shrubs planted in pieces and herbaceous plants are combined, multi-level composition is realized, plant communities are enriched, beautiful ceiba is selected as a main basis to adjust tree species for planting, the ecological effect of road greening is considered, the shrubs are planted in an inserting mode of oleander and Brazilian wild peony, the shrubs planted in pieces are selected from one of red flower successors or gold ficus, the height from the top surface of the shrubs planted in pieces to the road surface cannot be higher than 0.7m in a greening area within 15-30m of the end of a greening belt, rich levels created by the plants can be highlighted, full visual enjoyment is provided for people, the tree crown is umbrella-shaped, the leaf color is green, the adult tree trunk is in a wine bottle shape, the full-bloom period in winter is beautiful purple, beautiful people are excellent ornamental trees, the high-grade tree species for yard greening and beautifying are provided, the green space rate is increased, the shading effect of a traffic lane is considered, and the tree is a high-grade tree, The landscape effect is realized, so that the road can be better dissolved into the surrounding natural environment.

In the fifth step: due to the fact that the side branch zone is 2m, in consideration of the ecological effect of road greening, the arbor species are planted with fireworks, the distance is 6m, 1 plant of shrub safflower is planted among the arbors at intervals, allamanda cathartica is planted around, the fireworks are evergreen arbors, have large pinnate compound leaves, the tops of branches of large-scale cone inflorescence branches, flower orange, large flat and drooping pods, the tree is magnificent in leaf shade, flourishing like a fire, is also called as fireworks, is suitable for being used as a southern greening tree species, is about 10 m high, is large in crown, has even number of pinnate compound leaves, has 5-6 pairs of small leaves, is inverted oval or oblong, is dark green, and is unique in ornamental value due to young leaves, is purple red, is rhombus, is axillary, and is orange yellow to deep red, and has a flowering period of 4-5 months.

In the sixth step: the green belt of the sidewalk is planted in an isolated and transparent open mode, the trees in the sidewalk are planted in evergreen tree species and mango species at intervals of 6m, and the radix ophiopogonis is planted below each mango, so that the properties and the environment of buildings on two sides can be fully combined, and the greening belt has the characteristics of attractive appearance, convenience in maintenance, low manufacturing cost and the like.

In the planting process of green plants, the rainwater planting ditch is built, so that the condition of surface water accumulation is effectively reduced, the peak pressure of a drainage system is relieved, rainwater is naturally collected through the design of peripheral slope during rainfall, the effect of short-time water storage is achieved, the rainwater permeates to the underground through soil, and the purification and filtration effects are achieved for the rainwater.

The road greening method provided by the invention can improve the survival rate of green plants, and in case of raining, the planting layer and the green plants can absorb rainwater falling on the planting layer and the green plants, and in case of large rainfall, redundant rainwater can enter the reservoir through the planting layer for storage, so that the water storage capacity of a green belt is increased, the condition that the rainwater easily overflows from the planting layer to cause that the rainwater cannot normally enter the ground in case of large rainfall is reduced, meanwhile, sufficient moisture can be provided for the green plants in dry seasons, the condition that the moisture in the planting layer is easily consumed is reduced, and the condition that additional manual watering is needed for the green plants is reduced.

In the text, the side sub-zone and the middle sub-zone are collectively referred to as a vehicle sub-zone, please refer to fig. 2, the invention further provides a sponge layered road, which comprises a road part, a vehicle sub-zone part and a side slope part, wherein the road part comprises a plain soil layer 1, an ash soil layer 2, a cobble water storage layer 3, a permeable concrete layer 4, a permeable surface layer 5 and a water storage ditch 6, the top of the plain soil layer 1 is the ash soil layer 2, the cobble water storage layer 3 is positioned on the top of the ash soil layer 2, the permeable concrete layer 4 is positioned on the top of the cobble water storage layer 3, the permeable surface layer 5 is positioned on the top of the permeable concrete layer 4, the water storage ditch 6 is positioned on one side of the cobble water storage layer 3, and the water storage ditch 6 is communicated with the cobble water storage layer 3.

The branch vehicle belt part comprises a planting layer 7, a converging layer 8, a large stone layer 9, a porous pipe 10, a reservoir 11, a water pump 12, a water pumping pipe 13, a road tooth 14 and a spray head 15, wherein the reservoir 11 is positioned at the top of a plain soil layer 1, the large stone layer 9 is positioned at the top of the reservoir 11, a water storage ditch 6 is communicated with the reservoir 11, an overflow pipe is arranged on the reservoir 11, one end of the overflow pipe is communicated with a city water drainage network, the porous pipe 10 is positioned inside the large stone layer 9, the converging layer 8 is positioned at the top of the large stone layer 9, the planting layer 7 is positioned at the top of the converging layer 8, the water inlet end of the water pump 12 is fixedly communicated with one side of the bottom of the reservoir 11, the water outlet end of the water pump 12 is fixedly communicated with one end of the water pumping pipe 13, the two road teeth 14 are respectively positioned at two sides of the branch vehicle belt, one side of the two road teeth 14, which is opposite to each other side, because the setting of water pump 12 and shower nozzle 15, through the extraction of water pump to the inside water storage of cistern 11, spout by shower nozzle 15 simultaneously, can make full use of rainwater for the road surface operation of watering, the number of times of work of having reduced the watering lorry has obvious economic effect to the water resource, and when raining, the rainwater gets into cobblestone water-storage layer 3 by the road surface, gets into the inside of retaining irrigation canals and ditches 6 and the inward-remittance cistern 11 afterwards, consequently, improved the make full use of to the water resource.

The side slope part comprises a soil foundation 16, a water-permeable base layer 17, a leveling layer 18 and a water-permeable surface 19, wherein the soil foundation 16 is positioned at the top of the plain soil layer 1, the water-permeable base layer 17 is positioned at the top of the soil foundation 16, the leveling layer 18 is positioned at the top of the water-permeable base layer 17, the top of the leveling layer 18 is the water-permeable surface 19, and the water-permeable surface 19 is a water-permeable floor tile.

The invention has the beneficial effects that: the road greening method provided by the invention can improve the survival rate of green plants, and in case of raining, the planting layer and the green plants can absorb rainwater falling on the planting layer and the green plants, and in case of large rainfall, redundant rainwater can enter the reservoir through the planting layer for storage, so that the water storage capacity of a green belt is increased, the condition that the rainwater easily overflows from the planting layer to cause that the rainwater cannot normally enter the ground in case of large rainfall is reduced, meanwhile, sufficient moisture can be provided for the green plants in dry seasons, the condition that the moisture in the planting layer is easily consumed is reduced, and the condition that additional manual watering is needed for the green plants is reduced.

The invention effectively reduces the damage and influence caused by disasters such as urban flood waterlogging, exerts the functions of purifying urban water resources, reducing water pollution, replenishing underground water and the like, greatly improves the practicability of the water resources in China, reduces the consumption and waste of the water resources, protects the natural ecological environment in China, scientifically and reasonably controls the road rainwater, and effectively promotes the development of cities in China.

In the planting process of green plants, the rainwater planting ditch is built, so that the condition of surface water accumulation is effectively reduced, the flood peak pressure of a drainage system is relieved, rainwater is naturally collected through the design of peripheral slope during rainfall to achieve the effect of short-time water storage, and the rainwater permeates to the underground through soil and has the effects of purifying and filtering the rainwater.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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

Claims

1. A sponge layered road greening construction method is characterized by comprising the following steps:

in the first step: the cross section of the road surface is arranged in four ways: mainly comprises 4m sidewalks, 2m side sub-belts, 11.5m motor vehicle lanes, 3m central sub-belts, 11.5m motor vehicle lanes, 2m side sub-belts and 4m sidewalks, and the total width of the road is 38 m;

s1, excavating a foundation pit, namely excavating the foundation pit with the depth of five meters by using an excavator;

s2, building a reservoir, wherein the reservoir is a concrete-poured rectangular reservoir, the wall thickness is 0.25M, the lining material is M7.5 cement mortar, the surface layer is plastered by M10 cement mortar, the bottom of the reservoir is shaped like a pot bottom, the C15 concrete is embedded into the bottom, the mixing is required to be uniform, the pouring is mechanically vibrated, the compactness and flatness are achieved, the thickness is 0.1-0.2M, and the surface is plastered by M10 cement mortar;

s3, building a rainwater planting ditch, wherein the bottom of the ditch can be a slope bottom or a flat bottom and is provided with an inclined transverse slope and a moderate longitudinal slope;

s4, paving the rainwater planting ditch in a water-permeable way, firstly paving a master layer with the porosity of 35-45% and the effective pore diameter of more than or equal to 80% at the bottom of the rainwater planting ditch, then burying the porous pipe in the middle of the master layer, paving a confluence layer with the porosity of thirty centimeters, and finally, paving a planting layer;

in step three: the plant configuration firstly considers the adaptability of the plants to moist soil, selects the moisture-proof plants capable of bearing 24-48h waterlogging state in rainy season, selects the native plants as much as possible, considers the survival capability of the plants under extreme conditions of low temperature in winter, even frozen soil and the like, and finally comprehensively considers the collocation of the posture, color, texture, flowering phase and size of the plants to form a road landscape with bright color;

in step four: because the central partition is 3m, arbors, tree-planted shrubs and herbaceous plants are combined, multi-level composition is carried out, plant communities are enriched, beautiful ceiba is selected as a main basis to regulate tree species for planting, and meanwhile, the shrubs are planted by inserting oleander and Brazil wild peony in an inserting mode in consideration of the ecological effect of road greening;

in the fifth step: because the side branch belt is 2m, the ecological effect of road greening is considered, the arbor species are planted with the fireworks, the spacing is 6m, 1 big red flower is planted among the arbors at intervals, and the allamanda cathartica is planted on the periphery;

2. The construction method for sponge layered road greening according to claim 1, wherein the construction method comprises the following steps: and in the second step, fifty centimeters of coarse sand needs to be paved at the bottom of the foundation pit, and twenty centimeters of fine sand needs to be paved at the top of the coarse sand.

3. The construction method for sponge layered road greening according to claim 1, wherein the construction method comprises the following steps: and the confluent layer in the second step is cobblestones.

4. The construction method for sponge layered road greening according to claim 1, wherein the construction method comprises the following steps: in the second step, the planting layer is mainly formed by mixing 20% of fine sand into planting soil, the arbor is larger than or equal to 1.2m, the shrub is larger than or equal to 0.9m, and the porosity is 25% -35%.

5. The construction method for sponge layered road greening according to claim 1, wherein the construction method comprises the following steps: in the fourth step, the planting shrubs are selected from one of the red flower juniper or the golden banyan, and the height from the top surfaces of the planting shrubs to the road surface cannot be higher than 0.7m in a green area within a distance of 15-30m from the end of the green belt.

6. The utility model provides a sponge hierarchical formula road, includes road portion, divides the car tape part and slope part, its characterized in that: the road part includes plain soil layer (1), lime-soil layer (2), cobblestone water-storage layer (3), the concrete layer (4) that permeates water, surface course (5) and water storage ditch (6) permeate water, the top on plain soil layer (1) is lime-soil layer (2), cobblestone water-storage layer (3) are located the top on lime-soil layer (2), the concrete layer (4) that permeates water is located the top of cobblestone water-storage layer (3), surface course (5) that permeates water is located the top of concrete layer (4) that permeates water, water storage ditch (6) are located one side of cobblestone water-storage layer (3), and water storage ditch (6) are in the intercommunication state with cobblestone water-storage layer (3).

7. The construction method for sponge layered road greening according to claim 1, wherein the construction method comprises the following steps: the branch truck belt part comprises a planting layer (7), a confluence layer (8), a stone layer (9), a porous pipe (10), a reservoir (11), a water pump (12), a water pumping pipe (13), a road tooth (14) and a spray head (15), wherein the reservoir (11) is positioned at the top of a plain soil layer (1), the stone layer (9) is positioned at the top of the reservoir (11), a water storage ditch (6) and the reservoir (11) are in a communicated state, an overflow pipe is arranged on the reservoir (11), one end of the overflow pipe is communicated with a city water drainage network, the porous pipe (10) is positioned inside the stone layer (9), the confluence layer (8) is positioned at the top of the stone layer (9), the planting layer (7) is positioned at the top of the confluence layer (8), the water inlet end of the water pump (12) is fixedly communicated with one side of the bottom of the reservoir (11), and the water outlet end of the water pump (12) is fixedly communicated with one end of the water pumping pipe (13), the two way tooth (14) are located the both sides in lane respectively, two way one side that way tooth (14) carried on the back mutually and one side fixed connection of shower nozzle (15), the other end of drinking-water pipe (13) and the end fixed intercommunication of intaking of shower nozzle (15).

8. The construction method for sponge layered road greening according to claim 1, wherein the construction method comprises the following steps: the side slope part comprises a soil foundation (16), a water permeable base layer (17), a leveling layer (18) and a water permeable surface (19), the soil foundation (16) is located at the top of the plain soil layer (1), the water permeable base layer (17) is located at the top of the soil foundation (16), the leveling layer (18) is located at the top of the water permeable base layer (17), the top of the leveling layer (18) is the water permeable surface (19), and the water permeable surface (19) is a water permeable floor tile.