CN111455772A - Road structure based on sponge city technology and construction method thereof - Google Patents
Road structure based on sponge city technology and construction method thereof Download PDFInfo
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- CN111455772A CN111455772A CN202010407267.8A CN202010407267A CN111455772A CN 111455772 A CN111455772 A CN 111455772A CN 202010407267 A CN202010407267 A CN 202010407267A CN 111455772 A CN111455772 A CN 111455772A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
- E01C11/226—Coherent pavings
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
- E03F1/002—Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells
- E03F1/003—Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells via underground elongated vaulted elements
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/02—Arrangement of sewer pipe-lines or pipe-line systems
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
- E03F5/0404—Gullies for use in roads or pavements with a permanent or temporary filtering device; Filtering devices specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/06—Gully gratings
Abstract
The invention provides a road structure based on sponge city technology and a construction method thereof, comprising a pedestrian road, an auxiliary road and a main lane which are paved into a road in parallel; a rainwater collecting well is arranged below the ground between the pedestrian road and the auxiliary road, a sunken greenbelt is arranged below the ground between the auxiliary road and the main lane, the rainwater collecting well and the sunken greenbelt are communicated with a rainwater pipe inspection well, and the rainwater pipe inspection well is positioned below the ground of the auxiliary road. The invention can change the traditional method of fast and straight rainwater drainage, increase the rainwater absorption function of road greening, use permeable pavement and infiltration pipes on sidewalks, push the collection, purification and utilization of road rainwater, and reduce the pressure on municipal drainage systems.
Description
Technical Field
The invention relates to a road structure based on a sponge city technology and a construction method thereof, belonging to the technical field of municipal roads.
Background
In traditional municipal road construction, a large amount of rainwater resources directly flow away from a rainwater pipe network arranged below an urban road, so that huge waste of water is caused, and the burden of urban drainage facilities is increased. The pedestrian road paved in a permeable mode is adopted, rainwater directly permeates into a road subgrade, and certain damage and potential safety hazards are caused to the subgrade. Meanwhile, the traditional road rainwater drainage system has various defects of high possibility of waterlogging, incapability of effectively coping with flood disasters and the like, so that the urban development faces huge environmental and resource pressure.
Aiming at the severe situations of rainwater resource waste, serious environmental pollution and ecological system degradation, the traditional method of quickly discharging rainwater and directly discharging rainwater is changed, the rainwater absorption function of road greening is increased, the permeable pavement is used on a sidewalk, the collection, purification and utilization of the rainwater on the road are pushed, the pressure on a municipal drainage system is reduced, and the method is an important embodiment of the coordinated development of environmental resources.
Disclosure of Invention
In order to solve the technical problems, the invention provides a road structure based on a sponge city technology and a construction method thereof, the road structure based on the sponge city technology and the construction method thereof can change the traditional method of fast rainwater drainage and direct rainwater drainage, increase the rainwater absorption function of road greening, use permeable pavement and infiltration pipes on sidewalks, push the collection, purification and utilization of road rainwater, and reduce the pressure on municipal drainage systems.
The invention is realized by the following technical scheme.
The invention provides a road structure based on sponge city technology and a construction method thereof, comprising a pedestrian road, an auxiliary road and a main lane which are paved into a road in parallel; a rainwater collecting well is arranged below the ground between the pedestrian road and the auxiliary road, a sunken greenbelt is arranged below the ground between the auxiliary road and the main lane, the rainwater collecting well and the sunken greenbelt are communicated with a rainwater pipe inspection well, and the rainwater pipe inspection well is positioned below the ground of the auxiliary road.
And a rainwater pipe is arranged at the bottom of the rainwater pipe inspection well and used for draining water.
The sidewalk is formed by laying waterproof geotextile, graded broken stone cushion layers, permeable concrete base layers, permeable geotextile, medium sand leveling layers and permeable bricks from bottom to top.
The auxiliary road is formed by paving the auxiliary road bottom grade with gravel, the auxiliary road second grade with gravel, the auxiliary road first grade with gravel, the auxiliary road asphalt concrete and the auxiliary road surface fine-grained gravel from bottom to top.
The main lane is formed by paving the bottom-level gravel of the main road, the second-level gravel of the main road, the first-level gravel of the main road, asphalt concrete of the main road and fine-grained gravel on the surface of the main road from the bottom to the top.
The rainwater collecting well is composed of a rainwater collecting vertical well and a rainwater grate, the rainwater grate is covered at the position of an opening at the top of the rainwater collecting vertical well, a sidewalk curb is arranged at the side edge of a sidewalk and is pressed on the rainwater collecting vertical well, a PVC infiltration pipe is arranged at the position, close to the rainwater collecting vertical well, of the bottom of the sidewalk, the PVC infiltration pipe is communicated to the inner cavity of the rainwater collecting vertical well, a rainwater collecting vertical well inner cavity bottom is communicated with a rainwater drainage pipe, and the rainwater drainage pipe is communicated to a rainwater pipe inspection well.
The sunken greenbelt is formed by arranging a gravel layer, a packing layer and a planting soil layer from bottom to top, one end of a greenbelt drain pipe is communicated to the rainwater pipe inspection well, the other end of the greenbelt drain pipe penetrates out of the upper portion of the planting soil layer, and an environment-friendly rainwater port is formed in the position, out of the upper portion of the planting soil layer, of the upper end of the greenbelt drain pipe.
Impermeable films are laid at the lower parts between the sunken greenbelts and the auxiliary roads and between the sunken greenbelts and the main lanes, and the middle upper parts are isolated by concrete backrests; a drainage curb is pressed on the concrete backrest, a curb drainage port is formed in the position, higher than the concrete backrest and higher than the upper surfaces of the auxiliary road and the main lane, of the drainage curb, and a curb mortar foundation is paved at the bottom of the drainage curb; the impermeable membrane extends to the bottom of the sunken green land in a slope.
The auxiliary road first-level mixed crushed stone and the main road first-level mixed crushed stone are both 5% cement-stabilized graded crushed stone, the auxiliary road second-level mixed crushed stone and the main road second-level mixed crushed stone are both 4% cement-stabilized graded crushed stone, the auxiliary road surface fine-grain crushed stone and the main road surface fine-grain crushed stone are both fine-grain asphalt mastic crushed stone, and the auxiliary road asphalt concrete and the main road asphalt concrete are both medium-grain asphalt concrete.
A construction method of a road structure based on a sponge city technology comprises the following steps:
① waterproof geotextile is laid on the bottom of a pedestrian road, PVC infiltration pipes are laid on the waterproof geotextile along the inner side of the sidewalk, the pipe diameter is 50-100mm, a graded broken stone base layer with the thickness of 15 cm-20 cm is laid, the graded broken stones are mechanically mixed, paved and rolled, 12-15 t of three-wheel road rollers are used for rolling, the compaction thickness of each layer is not more than 15cm, the compaction thickness of each layer is not more than 20cm when 18-20 t of the road roller is used, when the compaction thickness exceeds the requirement, the waterproof geotextile is laid in layers, the compaction thickness of each layer is not less than 10cm, the compaction times are not less than 6-8 times until no obvious wheel tracks exist on the surface, C15 pervious concrete with the thickness of 15 cm-20 cm is laid, a medium sand leveling layer is laid between the pervious brick and the pervious concrete, and a pervious geotextile is adopted;
② rainwater seeps into the pedestrian road, and is connected into a rainwater collecting well through a PVC seeping pipe arranged in the graded broken stone base layer, and is finally connected into a rainwater pipe through arranging a rainwater drainage pipe, wherein the diameter of the rainwater drainage pipe is 200-400 mm, and the inclination angle is 15-30 degrees;
③ auxiliary road and main lane, from top to bottom, are fine grain asphalt mastic macadam, medium grain asphalt concrete, 5% cement stabilized graded macadam, 4% cement stabilized graded macadam and graded macadam, wherein the graded macadam cushion layer is selected from hard and clean granules, the flatness requirement is not more than 15mm, in the cement stabilized graded macadam subbase layer, the cement mixing amount is 4% or 5%, 32.5 grade common cement and silicate cement can be used, but the initial setting time is more than 3h, the final setting time is more than 6h, the cement stabilized graded macadam needs to be stirred, spread and rolled by machinery, the standard density of the fine grain asphalt mastic compactness is not less than 98%, the flatness sigma is not more than 2.8mm, and the IRI is not more than 3.3 m/Km;
④ a sunken green land with the width of 2-4 m is arranged between the auxiliary road and the main lane, a gravel layer with the thickness of 15-20 cm, a filler layer with the thickness of 20-35 cm and a planting soil layer with the thickness of 20-30 cm are sequentially paved on the sunken green land from the bottom, and an anti-seepage film is arranged on the contact part of the bottom of the sunken green land, the auxiliary road and the main lane;
⑤ drainage kerbs are arranged on two sides of the auxiliary road and the main lane, the drainage kerbs are provided with kerbstone water outlets, the size of the water outlets is 20cm × 30cm, rainwater collected by the auxiliary road and the main lane can enter a sunken green land through the kerbstone water outlets, and a kerbstone mortar foundation of 5 cm-10 cm is laid at the bottom of the drainage kerbstone;
⑥ the sunken greenbelt collects rainwater and connects to the rainwater pipe through the greenbelt drainpipe.
The invention has the beneficial effects that: the rainwater drainage system can change the traditional method of fast draining and direct draining of rainwater, increase the function of road greening for rainwater consumption, use permeable pavement and infiltration pipe on a sidewalk, push the collection, purification and utilization of the rainwater on the road, and reduce the pressure on the municipal drainage system.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic top view of FIG. 1;
FIG. 3 is an enlarged fragmentary schematic view of the rain water collection well of FIG. 1;
FIG. 4 is an enlarged partial schematic view of the storm drain manhole of FIG. 1;
FIG. 5 is a schematic elevation view of the drainage curb of FIG. 4;
FIG. 6 is a side view schematic of the structure of FIG. 5;
fig. 7 is a schematic perspective view of fig. 5.
In the figure: 1-sidewalk, 11-water permeable brick, 12-medium sand leveling layer, 13-water permeable geotextile, 14-water permeable concrete base layer, 15-graded broken stone cushion layer, 16-water-proof geotextile, 17-PVC infiltration pipe, 18-sidewalk kerb, 2-auxiliary road, 21-auxiliary road surface fine particle broken stone, 22-auxiliary road asphalt concrete, 23-auxiliary road first grade broken stone, 24-auxiliary road second grade broken stone, 25-auxiliary road bottom grade broken stone, 26-water drainage kerb stone, 261-kerb stone water discharge port, 262-kerb stone mortar foundation, 27-concrete back, 3-main lane, 31-main road surface fine particle broken stone, 32-main road asphalt concrete, 33-main road first grade broken stone, 34-main road second grade broken stone, 35-main road bottom graded broken stone, 4-sunken greenbelt, 41-environment-friendly rainwater inlet, 42-planting soil layer, 43-packing layer, 44-gravel layer, 45-impermeable membrane, 46-greenbelt drainage pipe, 5-rainwater collecting well, 51-rainwater collecting vertical shaft, 52-rainwater grate, 6-rainwater drainage pipe, 7-rainwater pipe inspection well and 8-rainwater pipe.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 1 to 7, the road structure based on the sponge city technology and the construction method thereof mainly comprise a pedestrian road 1, an auxiliary road 2, a main lane 3, a sunken greenbelt 4, a rainwater collecting well 5, a rainwater drainage pipe 6, a rainwater pipe inspection well 7 and a rainwater pipe 8.
The pedestrian road 1 is composed of water permeable bricks 11, a medium sand leveling layer 12, water permeable geotextile 13, a water permeable concrete base layer 14, a graded broken stone cushion layer 15 and waterproof geotextile 16 from top to bottom, and is connected into a rainwater collecting well 5, and rainwater seeping from the pedestrian road 1 is connected into a rainwater pipe 8 through a rainwater drainage pipe 6 and a rainwater pipe inspection well 7.
The auxiliary road 2 is composed of auxiliary road surface fine-grained macadam 21 (fine-grained asphalt mastic macadam), auxiliary road asphalt concrete 22 (medium-grained asphalt concrete), auxiliary road first-grade macadam 23 (5% cement-stabilized graded macadam), auxiliary road second-grade macadam 24 (4% cement-stabilized graded macadam) and auxiliary road bottom graded macadam 25. The sub-road 2 collects rainwater flowing into the sunken greens 4 through the curb drain 261 on the drainage curb 26.
The main lane 3 is composed of main road surface fine-grained macadam 31 (fine-grained asphalt mastic macadam), main road asphalt concrete 32 (medium-grained asphalt concrete), main road first-grade macadam 33 (5% cement-stabilized graded macadam), main road second-grade macadam 34 (4% cement-stabilized graded macadam), and main road bottom-grade macadam 35. The main lane 3 collects rainwater to flow into the sunken green land 4 through the curb drain 261 on the drainage curb 26.
The sunken green land 4 consists of an environment-friendly rainwater port 41, a planting soil layer 42, a filler layer 43, a gravel layer 44 and an impermeable membrane 45 (formed by two layers of one membrane), and collected rainwater is connected into a rainwater pipe 8 through a green land drainage pipe 46.
The traditional rainwater collecting and discharging system is mainly a 'quick drainage' system of road surface rainwater → a rainwater port connecting pipe → an inspection well → a municipal pipe network. This application mainly centers on this theory in sponge city, through arrange the rainwater in the pedestrian road that permeates water and collect the infiltration pipe, arrange sunken rainwater wetland, arrange measures such as water-permeable curb at the main lane, change traditional rainwater and collect discharge system, delay the time that the rainwater got into the pipe network to make the initial stage rainwater obtain certain purification. Implement according to this patent, can effectively collect, purify and utilize the road rainwater, alleviate the pressure to municipal drainage system, can change the rainwater simultaneously and arrange fast, the direct traditional way of arranging, increase road greening and absorb the function to the rainwater.
In specific implementation, the construction is carried out according to the following steps:
① is first conductedWaterproof geotextile (500 g/m) is laid on the bottom surface of the pedestrian road2) And paving PVC infiltration pipes with the pipe diameter of 50-100mm along the inner side of the sidewalk to prevent rainwater from infiltrating into the roadbed, then paving a graded broken stone base layer with the thickness of 15-20 cm, wherein the graded broken stones need to be mechanically stirred, paved and rolled, and the rolled broken stones are rolled by a three-wheel roller with 12-15 t, the compacted thickness of each layer is not more than 15cm, the compacted thickness of each layer is not more than 20cm when the roller is 18-20 t, and when the compacted thickness exceeds the requirements, the layers are paved in layers, the compacted thickness of each layer is not less than 10cm, and the number of compaction passes is not less than 6-8 times until no obvious wheel tracks exist on the surface. Then C15 pervious concrete with the thickness of 15 cm-20 cm is paved, a middle sand leveling layer is paved between the pervious bricks and the pervious concrete for 3 cm-5 cm, and pervious geotextile (200 g/m) is adopted between the layers2)。
② infiltration rainwater of pedestrian road, the PVC infiltration pipe through arranging in the graded broken stone basic unit inserts rainwater collection well, then through setting up the rainwater calandria, finally inserts the downspout, and the rainwater calandria diameter is generally got and is 200mm ~ 400mm, and the inclination sets up to 15 degrees ~ 30 degrees.
③ the auxiliary road and the main road are all fine grain asphalt mastic macadam, medium grain asphalt concrete, 5% cement stable graded macadam, 4% cement stable graded macadam and graded macadam from top to bottom, wherein the graded macadam cushion layer is selected from hard and clean granules, the flatness requirement is not more than 15mm, the cement mixing amount in the cement stable graded macadam subbase layer is 4% or 5%, 32.5 grade common cement and silicate cement can be used, but the initial setting time is more than 3h and the final setting time is more than 6h, the cement stable graded macadam needs to be mechanically stirred, paved and rolled, the standard density of the fine grain asphalt mastic compactness is not less than 98%, the flatness sigma is not more than 2.8mm, and the IRI is not more than 3.3 m/Km.
④ a sunken green land is arranged between the auxiliary road and the main lane, the width is generally set to 2-4 m, the sunken green land is paved with gravel layers 15-20 cm thick, filler layers 20-35 cm thick and planting soil layers 20-30 cm thick in sequence from the bottom, and an anti-seepage film (two films are arranged) is arranged at the contact part of the bottom of the sunken green land, the auxiliary road and the main lane to prevent natural water stored in the green land from permeating into the roadbed to damage the road.
⑤ drainage kerbs are arranged on both sides of the auxiliary road and the main lane, the drainage kerbs are provided with kerbstone water outlets, the size of the water outlets is 20cm × 30cm (width × height), rainwater collected by the auxiliary road and the main lane can enter the sunken greenbelts through the kerbstone water outlets, and a kerbstone mortar foundation of 5 cm-10 cm is laid at the bottom of the drainage kerbstone.
⑥ the sunken greenbelt collects rainwater and connects to the rainwater pipe through the greenbelt drainpipe.
Through the measures of arranging the rainwater collection infiltration pipe in the permeable pedestrian road, arranging the sunken rainwater wetland in the main lane, arranging the permeable curb and the like, the traditional rainwater collection and drainage system is changed, the time for rainwater to enter a pipe network is delayed, and the initial rainwater is purified to a certain extent.
Claims (10)
1. The utility model provides a road structure based on sponge urban technology, includes that pedestrian road (1), auxiliary road (2), main lane (3) are laid side by side and are established into the road, its characterized in that: a rainwater collecting well (5) is arranged below the ground between the pedestrian road (1) and the auxiliary road (2), a sunken greenbelt (4) is arranged below the ground between the auxiliary road (2) and the main lane (3), the rainwater collecting well (5) and the sunken greenbelt (4) are communicated with a rainwater pipe inspection well (7), and the rainwater pipe inspection well (7) is positioned below the ground of the auxiliary road (2).
2. The road structure based on sponge city technology of claim 1, characterized in that: and a rainwater pipe (8) for draining water is arranged at the bottom of the rainwater pipe inspection well (7).
3. The road structure based on sponge city technology of claim 1, characterized in that: the pedestrian road (1) is formed by paving waterproof geotextile (16), graded broken stone cushion layers (15), a permeable concrete base layer (14), permeable geotextile (13), a medium sand leveling layer (12) and permeable bricks (11) from bottom to top.
4. The road structure based on sponge city technology of claim 1, characterized in that: the auxiliary road (2) is formed by paving auxiliary road bottom grade gravel (25), auxiliary road second grade gravel (24), auxiliary road first grade gravel (23), auxiliary road asphalt concrete (22) and auxiliary road surface fine-grained gravel (21) from bottom to top.
5. The road structure based on sponge city technology of claim 1, characterized in that: the main lane (3) is formed by paving main road bottom graded crushed stones (35), main road second grade crushed stones (34), main road first grade crushed stones (33), main road asphalt concrete (32) and main road surface fine-grained crushed stones (31) from bottom to top.
6. The road structure based on sponge city technology of claim 1, characterized in that: the rainwater collection well (5) is composed of a rainwater collection vertical shaft (51) and a rainwater grate (52), the rainwater grate (52) is covered at the position of an opening at the top of the rainwater collection vertical shaft (51), a sidewalk curb stone (18) is arranged at the side edge of a sidewalk road (1) in a press fit mode on the rainwater collection vertical shaft (51), a PVC infiltration pipe (17) is arranged at the edge position, close to the rainwater collection vertical shaft (51), of the bottom of the sidewalk road (1), the PVC infiltration pipe (17) is communicated to the inner cavity of the rainwater collection vertical shaft (51), the bottom of the inner cavity of the rainwater collection vertical shaft (51) is communicated with a rainwater discharge pipe (6), and the rainwater discharge pipe (6) is communicated to a rainwater pipe inspection well (7).
7. The road structure based on sponge city technology of claim 1, characterized in that: the sunken greenbelt (4) is formed by arranging a gravel layer (44), a packing layer (43) and a planting soil layer (42) from bottom to top, one end of a greenbelt drain pipe (46) is communicated to the rainwater pipe inspection well (7), the other end of the greenbelt drain pipe penetrates out of the planting soil layer (42), and an environment-friendly rainwater port (41) is arranged at the position, through which the upper end of the greenbelt drain pipe (46) penetrates out of the planting soil layer (42).
8. The road structure based on sponge city technology of claim 7, characterized in that: impermeable membranes (45) are laid at the lower parts between the sunken greenbelts (4) and the auxiliary roads (2) and between the sunken greenbelts (4) and the main lanes (3), and the middle upper parts are isolated by concrete backrests (27); a drainage curb (26) is pressed on the concrete backrest (27), a curb drainage port (261) is formed in the position, higher than the concrete backrest (27) and higher than the upper surfaces of the auxiliary road (2) and the main lane (3), of the drainage curb (26), and a curb mortar foundation (262) is paved at the bottom of the drainage curb (26); the impermeable membrane (45) extends to the bottom of the sunken green land (4) in a slope.
9. Road structure based on sponge urban technology according to claim 4 or 5, characterized in that: the auxiliary road first-level crushed stone (23) and the main road first-level crushed stone (33) are both 5% cement-stabilized graded crushed stone, the auxiliary road second-level crushed stone (24) and the main road second-level crushed stone (34) are both 4% cement-stabilized graded crushed stone, the auxiliary road surface fine-grain crushed stone (21) and the main road surface fine-grain crushed stone (31) are both fine-grain asphalt mastic crushed stone, and the auxiliary road asphalt concrete (22) and the main road asphalt concrete (32) are both medium-grain asphalt concrete.
10. A road structure construction method based on sponge city technology is characterized in that: the method comprises the following steps:
① waterproof geotextile is laid on the bottom of a pedestrian road, PVC infiltration pipes are laid on the waterproof geotextile along the inner side of the sidewalk, the pipe diameter is 50-100mm, a graded broken stone base layer with the thickness of 15 cm-20 cm is laid, the graded broken stones are mechanically mixed, paved and rolled, 12-15 t of three-wheel road rollers are used for rolling, the compaction thickness of each layer is not more than 15cm, the compaction thickness of each layer is not more than 20cm when 18-20 t of the road roller is used, when the compaction thickness exceeds the requirement, the waterproof geotextile is laid in layers, the compaction thickness of each layer is not less than 10cm, the compaction times are not less than 6-8 times until no obvious wheel tracks exist on the surface, C15 pervious concrete with the thickness of 15 cm-20 cm is laid, a medium sand leveling layer is laid between the pervious brick and the pervious concrete, and a pervious geotextile is adopted;
② rainwater seeps into the pedestrian road, and is connected into a rainwater collecting well through a PVC seeping pipe arranged in the graded broken stone base layer, and is finally connected into a rainwater pipe through arranging a rainwater drainage pipe, wherein the diameter of the rainwater drainage pipe is 200-400 mm, and the inclination angle is 15-30 degrees;
③ auxiliary road and main lane, from top to bottom, are fine grain asphalt mastic macadam, medium grain asphalt concrete, 5% cement stabilized graded macadam, 4% cement stabilized graded macadam and graded macadam, wherein the graded macadam cushion layer is selected from hard and clean granules, the flatness requirement is not more than 15mm, in the cement stabilized graded macadam subbase layer, the cement mixing amount is 4% or 5%, 32.5 grade common cement and silicate cement can be used, but the initial setting time is more than 3h, the final setting time is more than 6h, the cement stabilized graded macadam needs to be stirred, spread and rolled by machinery, the standard density of the fine grain asphalt mastic compactness is not less than 98%, the flatness sigma is not more than 2.8mm, and the IRI is not more than 3.3 m/Km;
④ a sunken green land with the width of 2-4 m is arranged between the auxiliary road and the main lane, a gravel layer with the thickness of 15-20 cm, a filler layer with the thickness of 20-35 cm and a planting soil layer with the thickness of 20-30 cm are sequentially paved on the sunken green land from the bottom, and an anti-seepage film is arranged on the contact part of the bottom of the sunken green land, the auxiliary road and the main lane;
⑤ drainage kerbs are arranged on two sides of the auxiliary road and the main lane, the drainage kerbs are provided with kerbstone water outlets, the size of the water outlets is 20cm × 30cm, rainwater collected by the auxiliary road and the main lane can enter a sunken green land through the kerbstone water outlets, and a kerbstone mortar foundation of 5 cm-10 cm is laid at the bottom of the drainage kerbstone;
⑥ the sunken greenbelt collects rainwater and connects to the rainwater pipe through the greenbelt drainpipe.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112064449A (en) * | 2020-09-13 | 2020-12-11 | 武汉市汉阳市政建设集团有限公司 | Ecological gallery sponge green channel circulating system and construction method thereof |
| CN113529894A (en) * | 2021-07-21 | 2021-10-22 | 中国水利水电第五工程局有限公司 | Urban road drainage system |
| CN114016350A (en) * | 2021-09-22 | 2022-02-08 | 李万华 | Sponge structure for longitudinal rainwater drainage of urban road |
| CN114908636A (en) * | 2022-05-25 | 2022-08-16 | 中国恩菲工程技术有限公司 | Sponge urban road system |
| CN115418908A (en) * | 2022-08-29 | 2022-12-02 | 中国一冶集团有限公司 | Sponge seepage and drainage system for sidewalk and construction method |
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| CN112064449A (en) * | 2020-09-13 | 2020-12-11 | 武汉市汉阳市政建设集团有限公司 | Ecological gallery sponge green channel circulating system and construction method thereof |
| CN112064449B (en) * | 2020-09-13 | 2022-02-11 | 武汉市汉阳市政建设集团有限公司 | Ecological gallery sponge green channel circulating system and construction method thereof |
| CN113529894A (en) * | 2021-07-21 | 2021-10-22 | 中国水利水电第五工程局有限公司 | Urban road drainage system |
| CN114016350A (en) * | 2021-09-22 | 2022-02-08 | 李万华 | Sponge structure for longitudinal rainwater drainage of urban road |
| CN114908636A (en) * | 2022-05-25 | 2022-08-16 | 中国恩菲工程技术有限公司 | Sponge urban road system |
| CN115418908A (en) * | 2022-08-29 | 2022-12-02 | 中国一冶集团有限公司 | Sponge seepage and drainage system for sidewalk and construction method |
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