CN-122013617-A - Ecological environment-friendly cool street pavement structure and construction method thereof

CN122013617ACN 122013617 ACN122013617 ACN 122013617ACN-122013617-A

Abstract

The invention provides an ecological environment-friendly cool street pavement structure and a construction method thereof. The street pavement structure sequentially comprises a heat reflection coating, a colored permeable concrete surface layer, a graded broken stone base layer, an aquifer and a concrete bottom plate from top to bottom, wherein concrete side plates are arranged on two sides of the concrete bottom plate, waterproof geotextiles are paved between the concrete bottom plate and the aquifer and on the inner walls of the two concrete side plates, a water inlet and a water outlet are respectively arranged at two ends of the street pavement structure in the advancing direction, the water inlet is positioned at the bottom of the graded broken stone base layer and the top of the aquifer, the water outlet is positioned at the bottom of the aquifer and the top of the concrete bottom plate, and a water inlet pipe communicated with the water inlet and a water outlet pipe communicated with the water outlet are arranged in the water storage layer. According to the invention, the water is stored in the water storage layer for evaporation and heat dissipation and the reflecting heat of the color permeable concrete surface layer are used for realizing road surface cooling, so that the urban heat island effect is relieved, and the urban street ecological environment is improved.

Inventors

QIN JUZE
Niu Shengkuan
YIN ZUCHAO
LIU BIN
JIA RUIYU
ZHENG YUNPENG
YANG ZHUANG
ZHANG YU
NIU SHIHAO

Assignees

长江勘测规划设计研究有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260302

Claims (10)

1. An ecological environment-friendly cool street pavement structure is characterized by sequentially comprising a heat reflection coating (1), a color permeable concrete surface layer (2), a graded broken stone base layer (3), water storage layers (4) and concrete bottom plates (5) from top to bottom, wherein concrete side plates (6) are arranged on two sides of the concrete bottom plates (5), waterproof geotextiles (7) are paved between the concrete bottom plates (5) and the water storage layers (4) and on the inner walls of the two concrete side plates (6), the thickness of the color permeable concrete surface layer (1) is 20-24 cm, the concrete strength is C20-C35, the solar reflectance of the heat reflection coating is not less than 0.40, the thickness of the graded broken stone base layer (3) is 15-25 cm, the compactness is not less than 94%, the thickness of the concrete bottom plates (4) is 50-150 cm, the compactness is not less than 96%, the thicknesses of the concrete bottom plates (5) and the concrete side plates (6) are 20-40 cm, the concrete strength is not lower than C20-40 cm, and the bearing capacity of the concrete bottom plates (5) is not lower than 120 pa; The water inlet (9) and the water outlet (10) are respectively arranged at two ends of the advancing direction of the street pavement structure, the water inlet (9) is positioned at the bottom of the graded broken stone base layer (3) and the top of the water storage layer (4), the water outlet (10) is positioned at the bottom of the water storage layer (4) and the top of the concrete bottom plate (5), the water inlet pipe (8) communicated with the water inlet (9) is distributed at the upper part in the water storage layer (4), the water outlet pipe (11) communicated with the water outlet (10) is distributed at the lower part, the water inlet pipe (8) and the water outlet pipe (11) are all perforated water pipes, and valve switches are respectively arranged at the water inlet (9) and the water outlet (10).
2. The ecological environment-friendly cool street pavement structure of claim 1, wherein a water inlet (9) of the pavement structure is connected with a city water supply pipe network, a water outlet (10) is connected with the city rainwater pipe network to ensure that a water storage layer (4) stores water draining functions of city water supply, winter and stormwater weather, the functions of the cool street are ensured by city self water supply under drought conditions in summer and water draining in rainy days in winter through opening and closing control of a valve, the diameters of a water inlet pipe (8) and a water outlet pipe (9) are 150-300 mm, the water inlet pipe (8) and the water outlet pipe (9) are respectively in L shape or return shape or S shape and are distributed in parallel in the water storage layer (4) at different heights, holes on the water inlet pipe (8) and the water outlet pipe (9) are uniformly formed in the lower part of a pipe body, and the diameters of the holes are 5-10 mm.
3. The ecological environment-friendly cool street pavement structure according to claim 1 or 2, wherein the pavement structure further comprises a curb stone (12) arranged on the concrete side plates (6), the curb stone is positioned on two sides of the cool street and is adjacent to a house building, the curb stone is positioned on the concrete side plates and waterproof geotextile, concrete or rock curb stone is selected according to landscape requirements, the height is 18-22 cm, the thickness is not more than the thickness of color pervious concrete, the unit area mass of the waterproof geotextile (7) is not less than 350g/m 2 , the thickness is not less than 2.2mm, the breaking strength is not less than 15kN/m, and the breaking elongation is 40% -80%.
4. The ecological environment-friendly cool street pavement structure according to claim 1 or 2, wherein in the cross section direction of the pavement structure, the transverse slopes on two sides of the pavement center line are i, i is 1% -2%, the transverse slopes are connected with the pavement center line by circular curves, and the radius R of the circular curves is 100-300 m.
5. The ecological environment-friendly cool street pavement structure according to claim 1 or 2, wherein a water level monitoring well (13) with the diameter of 70-150 cm is further arranged at the edge of the street pavement structure, the bottom surface of the water level monitoring well (13) is flush with the bottom surface of an aquifer (4), a plurality of water permeable holes (14) communicated with the aquifer (4) are formed in a side wall of the water level monitoring well (13) close to the street pavement structure, the water permeable holes (14) are distributed according to plum blossom type, the aperture is 4-6 cm, the distance between adjacent holes is 8-11 cm, a filter layer is arranged on the water inlet side of the holes, a threshold scale of water level early warning of the water level monitoring well (13) is located at the position 4-6 cm below the bottom of a graded broken stone cushion layer, a water level sensor (16) is arranged at the height of the water level early warning threshold, an anti-theft cover plate (15) is arranged at the well mouth of the water level monitoring well (13), a water level alarm (17) is arranged on the anti-theft cover plate (15), the water level sensor (16) is connected with a water level alarm (17), and the water level alarm (17) is arranged in the water level monitoring well (13) through the scale.
6. The ecological environment-friendly cool street pavement structure as set forth in claim 1 or 2, wherein the color pervious concrete of the color pervious concrete surface layer (1) has a porosity of more than 15%, cement in the concrete is Portland cement or Portland cement with a strength grade of not less than 42.5, and pigment added in the color pervious concrete is selected from red, yellow or other inorganic pigments with good light reflection performance.
7. The ecological environment-friendly cool street pavement structure according to claim 1 or 2, wherein the heat-reflecting coating is a heat-reflecting heat-insulating coating, and comprises, by weight, 25-35 parts of epoxy resin, 8-15 parts of inorganic pigment, 5-15 parts of far infrared ceramic powder and 2.5-5 parts of diol bis-epoxy diluent, wherein the inorganic pigment is the same pigment as that in color pervious concrete.
8. The ecological environment-friendly cool street pavement structure according to claim 1 or 2 is characterized in that graded broken stone base layers (3) are filled and compacted by graded broken stone with the particle size less than or equal to 37.5mm, the crushing value is less than or equal to 35%, the compactness is more than or equal to 98%, the performance index of the ecological environment-friendly cool street pavement structure meets the requirements of JTG 3432 in the current highway engineering aggregate test rules, the material of the water storage layer comprises graded broken stone, porous ceramics, diatomite and/or bentonite, the graded broken stone comprises graded gravel with the particle size less than or equal to 53mm, the graded broken stone is used as a framework, the mass percentage of the graded broken stone is 75-80%, the crushing value is less than or equal to 40%, the mass percentage of the porous ceramics is 6-10%, the mass percentage of the diatomite and/or bentonite is 6-15%, the diatomite is more than 400 meshes, and the bentonite is sodium bentonite.
9. A construction method of the eco-friendly cool street road surface structure as claimed in any one of claims 1 to 8, comprising the steps of: s1, excavating side plate foundation pits on two sides of a street pavement structure to a designed depth, uniformly excavating and forming each side plate foundation pit, cleaning and leveling after excavating to the designed depth, detecting the foundation bearing capacity of the bottom surface of the side plate foundation pit, and ensuring continuous casting of side plate concrete under the condition that the foundation bearing capacity is not lower than 120 kpa; S2, after the concrete strength of the side plates reaches 75% of the design strength, excavating a road area between the two side plates and pouring a concrete bottom plate of the road area, wherein the excavating and pouring of the road area between the two side plates are carried out twice, the first time is carried out according to 3-6 m interval slot-skipping excavation, the foundation bearing capacity of the bottom surface of an excavated foundation pit is detected after the excavation is carried out to the design elevation, the bottom plate concrete of the first time excavated road area is poured under the condition that the foundation bearing capacity is not lower than 120 kpa; s3, fully paving waterproof geotextile after the strength of the concrete bottom plate and the side plate meets 80% of the design strength, extending the waterproof geotextile to the top of the side wall, and ensuring that the waterproof geotextile is completely attached to the concrete structure; s4, filling the water storage layer materials in layers, wherein the filling thickness of each layer is 15-30 cm, respectively paving the water drainage pipe and the water inlet pipe when the water storage layer materials are filled to the positions of the water drainage pipe and the water inlet pipe in layers, sealing the joint of the elbow of the water pipe, the water inlet sleeve and the water outlet sleeve, and ensuring that the holes on the water pipe are downward in the process of paving the water pipe; S5, after the construction of the aquifer is completed, paving a graded broken stone base layer above the aquifer, the transverse slope of the top surface of the base layer is designed according to the design the lateral slope is toward the central line of the street; S6, mounting a curb stone at the top of a concrete side plate of the street; S7, pouring color pervious concrete, curing, and uniformly spraying heat reflection paint on the dried and clean color pervious cement concrete surface layer after curing for 3-7 d, wherein the spraying time is 1-2 times, and the dosage per square meter is preferably 0.2-0.25 kg/m 2 .
10. The construction method of the ecological environment-friendly cool street pavement structure according to claim 9, wherein in the steps S1 and S2, when the foundation bearing capacity cannot meet the requirement, the foundation bearing capacity is not lower than 120kpa through replacement or reinforcement measures, segregation of coarse and fine aggregates is eliminated when water storage layer materials are filled in a layered mode in the step S5, a water inlet pipe extending out of a water inlet in the step S4 is connected with a city water supply pipe network, a water outlet pipe extending out of a water outlet is connected with a city rainwater pipe network, so that the water storage layer can store water drainage functions of city water supply, winter and stormwater weather, and control valves are respectively arranged at the water inlet and the water outlet.

Description

Ecological environment-friendly cool street pavement structure and construction method thereof Technical Field The invention relates to the field of road construction, in particular to an ecological environment-friendly cool street pavement structure and a construction method thereof. Background Urban heat island effects affect the global ecological environment. Researches show that the heat island effect can raise the urban air temperature by 5-15 ℃. The urban heat island effect not only increases the heat burden of residents and the public, and causes the increase of disease incidence and risk of the residents caused by heat, but also affects the urban ecological environment. The ground temperature in summer in the southern city of China is generally and frequently over 60 ℃ and even 70 ℃ and forms threat to public health, transportation trip, power supply and urban ecology. In the context of global warming and urbanization processes, coping with extreme ground high temperatures has become one of the core challenges that south urban sustainable development must face. Urban streets are composite functional spaces integrating daily commute, commercial activities, travel leisure and urban appearance quality improvement. The common asphalt pavement or pavement of the street is usually black, heat is absorbed rapidly under the condition of direct sunlight, the temperature of the pavement body is greatly improved, and the traveling experience is poor, so that a novel cool pavement technology capable of effectively reducing the temperature and relieving the heat island effect and facing pedestrians and non-motor vehicles is needed. Disclosure of Invention The invention provides an ecological environment-friendly cool street pavement structure and a construction method thereof aiming at the problems in the prior art, wherein the pavement structure stores moisture through a water storage layer for evaporation and heat dissipation and the reflecting heat of a color permeable concrete surface layer to realize pavement cooling, is used for relieving urban heat island effect, improving urban street ecological environment, creating cool streets capable of cooling and improving the passing comfort level of high-temperature weather street pedestrians and non-motor vehicles. In order to achieve the technical aim, the invention provides an ecological environment-friendly cool street pavement structure, which sequentially comprises a heat reflection coating, a color permeable concrete surface layer, a graded broken stone base layer, a water storage layer and a concrete bottom plate from top to bottom, wherein concrete side plates are arranged on two sides of the concrete bottom plate, waterproof geotextiles are paved between the concrete bottom plate and the water storage layer and on the inner walls of the two concrete side plates, the thickness of the color permeable concrete surface layer is 20-24 cm, the concrete strength is C20-C35, the solar reflectance of the heat reflection coating is not less than 0.40, the thickness of the graded broken stone base layer is 15-25 cm, the compactness is not less than 94%, the thickness of the water storage layer is 50-150 cm, the compactness is not less than 96%, the thickness of the concrete bottom plate and the concrete side plates is 20-40 cm, the concrete strength is not lower than C20, and the bearing capacity of a foundation at the lower part of the concrete bottom plate is not lower than 120kpa; The water inlet and the water outlet are respectively arranged at two ends of the advancing direction of the street pavement structure, the water inlet is positioned at the bottom of the graded broken stone base layer and the top of the water storage layer, the water outlet is positioned at the bottom of the water storage layer and the top of the concrete bottom plate, the water inlet pipe communicated with the water inlet is distributed at the upper part in the water storage layer, the water outlet pipe communicated with the water outlet is distributed at the lower part, the water inlet pipe and the water outlet pipe are all perforated water pipes, and valve switches are respectively arranged at the water inlet and the water outlet. The water inlet of the pavement structure is connected with the urban water supply network, the water outlet of the pavement structure is connected with the urban rainwater pipe network, so that the water storage layer is guaranteed to store urban water supply, the water drainage function in winter and stormy weather is achieved, the function of self-water supply of the city is guaranteed to cool the street under drought conditions in summer, accumulated water in the pavement is discharged in rainy days in winter, and the pavement structure is prevented from being frozen and damaged, the diameters of the water inlet pipe and the water outlet pipe are 150-300 mm, the water inlet pipe and the water outlet pipe are respectively L-shaped or reverse-shaped or