CN212641086U - Road surface structure based on asphalt concrete upper surface layer construction in rainy and humid areas - Google Patents
Road surface structure based on asphalt concrete upper surface layer construction in rainy and humid areas Download PDFInfo
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- CN212641086U CN212641086U CN202021146909.5U CN202021146909U CN212641086U CN 212641086 U CN212641086 U CN 212641086U CN 202021146909 U CN202021146909 U CN 202021146909U CN 212641086 U CN212641086 U CN 212641086U
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Abstract
The utility model discloses a road surface structure constructed on the basis of an asphalt concrete upper surface layer in a rainy and humid area, which belongs to the technical field of road surfaces and comprises a water stable base layer, a waterproof coiled material, an asphalt synchronous macadam seal layer and an asphalt concrete upper surface layer which are sequentially arranged from bottom to top; the asphalt synchronous broken stone sealing layer is characterized in that a diversion trench is formed in the top surface of the asphalt synchronous broken stone sealing layer, the asphalt concrete upper surface layer is an SMA-13 asphalt concrete upper surface layer, the SMA-13 asphalt concrete upper surface layer is filled in the diversion trench, the diversion trench is arranged along the transverse direction of the road surface, the diversion trench is arc-shaped and is reduced gradually from the middle part to the two ends, and the problem of easy water accumulation in the SMA asphalt concrete road surface is solved.
Description
Technical Field
The utility model relates to a road surface technical field, in particular to wet area of rainy road surface structure based on bituminous concrete upper surface construction.
Background
The special climatic conditions in the rainy regions in the south make the water stability and the durability of the asphalt concrete pavement worse, and a series of early damages such as water seepage, cracking, rutting, cavities, pits, loosening, stripping and the like are easy to generate, thereby affecting the service life and the use safety of the product. The SMA asphalt concrete pavement has the characteristics of high coarse aggregate, high mineral powder and asphalt usage, small void ratio, large surface roughness, high-temperature stability, high low-temperature crack resistance, high noise reduction capability, capability of improving visibility in rainy days, safety, comfort, good durability, good surface anti-sliding performance, water damage resistance, high aging resistance, less maintenance work, long service life, comprehensive economic benefit, good environmental benefit and the like due to the adoption of the fiber stabilizer, and can be widely applied to northern areas in recent years.
However, many SMA asphalt concrete pavements do not have a waterproof structure inside, which causes a large part of rainwater permeating from the asphalt concrete upper layer to permeate into the inside of the roadbed, so that the overall structure of the pavement is not stable enough.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a rainy moist area is based on the road surface structure of asphalt concrete top surface construction, it has solved the inside problem of easily ponding of SMA asphalt concrete road surface.
The above technical purpose of the present invention can be achieved by the following technical solutions:
a road surface structure constructed on the basis of an asphalt concrete upper surface layer in a rainy and humid area comprises a water-stable subbase layer, a stable base layer, a waterproof coiled material, an asphalt synchronous macadam seal layer and an asphalt concrete upper surface layer which are sequentially arranged from bottom to top;
the top surface of the asphalt synchronous broken stone seal layer is provided with a diversion trench, the asphalt concrete upper surface layer is an SMA-13 asphalt concrete upper surface layer, the SMA-13 asphalt concrete upper surface layer is filled in the diversion trench, the diversion trench is arranged along the transverse direction of the road surface, and the diversion trench is arc-shaped and is gradually reduced in height from the middle part to the two ends.
By adopting the structure, the asphalt concrete upper surface layer has better water permeability, can prevent water accumulation on a road surface, the asphalt synchronous macadam seal and the waterproof coiled material have good water seepage resistance, and the asphalt synchronous macadam seal and the waterproof coiled material are sequentially paved below the asphalt concrete upper surface layer to play a better waterproof role and reduce rainwater downward permeation. The setting of guiding gutter for the rainwater flows out to road surface both sides fast, has the effect of better drainage.
The method is further optimized as follows: u-shaped steel is arranged in the diversion trench, the outer surface of the U-shaped steel is fixed with the side wall of the diversion trench, and the U-shaped steel is arranged along the length direction of the diversion trench.
Adopt above-mentioned structure, with U shaped steel location in the guiding gutter, can play the effect of stereotyping on the one hand, on the other hand reducible rainwater passes through the guiding gutter infiltration downwards.
The method is further optimized as follows: the diversion trench is provided with a plurality of diversion trenches which are arranged along the longitudinal direction of the pavement, and the interval between every two adjacent diversion trenches is 50-120 cm.
Adopt above-mentioned structure for drainage speed improves the stability and the driving safety nature of road surface structure.
The method is further optimized as follows: the contact surface of the asphalt synchronous macadam seal layer and the asphalt concrete upper surface layer is an arc surface, and the height of the contact surface is gradually reduced from the middle part to the two sides of the pavement.
Adopt above-mentioned structure for the rainwater can flow to the road surface both sides along the contact surface of the synchronous rubble seal of pitch and asphalt concrete upper surface layer.
The method is further optimized as follows: waterproofing membrane is the arc and by middle part to road surface both sides height reduce gradually.
Adopt above-mentioned structure, make a small amount of rainwater that permeates in the synchronous rubble envelope of asphalt can flow to road surface both sides along waterproofing membrane, and water-proof effects is better.
The method is further optimized as follows: the thickness of the asphalt concrete upper surface layer at the central line of the pavement is 18cm, the thickness of the asphalt synchronous broken stone sealing layer at the central line of the pavement is 4cm, the thickness of the water-stable base layer at the central line of the pavement is 36cm, and the thickness of the water-stable base layer is 20 cm.
The method is further optimized as follows: the depth of the flow guide groove is 2 cm.
To sum up, the utility model discloses following beneficial effect has: the asphalt concrete upper surface layer has better water permeability, can prevent water accumulation on a road surface, the asphalt synchronous macadam seal layer and the waterproof coiled material have good water seepage resistance, and the asphalt synchronous macadam seal layer and the waterproof coiled material are sequentially paved below the asphalt concrete upper surface layer to play a better waterproof role, so that rainwater infiltration is reduced. The setting of guiding gutter for the rainwater flows out to road surface both sides fast, has the effect of better drainage. The problem of easy ponding in SMA asphalt concrete road surface is solved.
Drawings
FIG. 1 is a cross-sectional schematic view of a pavement of an embodiment, mainly used for showing the internal structure of the pavement;
fig. 2 is a schematic longitudinal sectional view of the pavement of the embodiment, which is mainly used for embodying the internal structure of the pavement.
In the figure, 1, a water-stable underlayer; 2. a stabilized base layer; 3. waterproof coiled materials; 4. synchronously breaking stone and sealing the layer by asphalt; 5. an upper asphalt concrete layer; 6. a diversion trench; 7. u-shaped steel.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b): a road surface structure based on asphalt concrete upper surface layer construction in a rainy and wet area is shown in figure 1-2 and comprises a water stable subbase layer 1, a stable base layer 2, a waterproof coiled material 3, an asphalt synchronous macadam seal layer 4 and an asphalt concrete upper surface layer 5 which are sequentially arranged from bottom to top. Waterproofing membrane 3 is the arc and highly reduces gradually by the middle part to road surface both sides, and is same, and the contact surface of synchronous rubble seal 4 of pitch and bituminous concrete upper surface 5 is the cambered surface and highly reduces gradually by the middle part to road surface both sides. Specifically, the thickness of the asphalt concrete upper surface layer 5 at the central line of the pavement is 18cm, the thickness of the asphalt synchronous broken stone seal layer 4 at the central line of the pavement is 4cm, the thickness of the water-stable base layer 2 at the central line of the pavement is 36cm, and the thickness of the water-stable base layer 1 is 20 cm.
Referring to fig. 1-2, the top surface of the asphalt synchronous gravel seal 4 is provided with guide grooves 6 for guiding rainwater to two sides of a road surface, and the depth of each guide groove 6 is 2 cm. The asphalt synchronous macadam seal coat 4 and the waterproof coiled material 3 both have good water seepage prevention performance, and the asphalt synchronous macadam seal coat 4 and the waterproof coiled material 3 are sequentially paved below the asphalt concrete upper surface layer 5 to play a good waterproof role, so that rainwater downward seepage is reduced. The asphalt concrete upper surface layer 5 is an SMA-13 asphalt concrete upper surface layer, and the SMA-13 asphalt concrete upper surface layer is filled in the diversion trench 6. The guiding gutter 6 sets up along the horizontal direction of road surface, and 6 both ends of guiding gutter are towards the horizontal both sides on road surface respectively promptly, and guiding gutter 6 sets up for the arc and highly reduces gradually to both ends by the middle part.
Referring to fig. 1-2, a U-shaped steel 7 adapted to the guiding gutter 6 is arranged in the guiding gutter 6, and the top surface of the U-shaped steel 7 is not higher than the top surface of the asphalt synchronous chip seal 4, preferably, the top surface of the U-shaped steel 7 is flush with the top surface of the asphalt synchronous chip seal 4. The outer surface of the U-shaped steel 7 is fixed with the side wall of the diversion trench 6, and the U-shaped steel 7 is arranged along the length direction of the diversion trench 6. The flow guide grooves 6 are arranged in a plurality, the flow guide grooves 6 are arranged along the longitudinal direction of the road surface, and the interval between every two adjacent flow guide grooves 6 is 50-120cm, generally about 70 cm.
The SMA-13 asphalt concrete upper layer mainly comprises SBS modified asphalt, coarse aggregate, fine aggregate, mineral powder, anti-stripping agent and fiber stabilizer. The indexes of SBS modified asphalt (matrix asphalt is A-grade No. 70 road petroleum asphalt) all meet the regulations of road asphalt pavement construction technical Specifications (JTG F40-2004). The coarse aggregate is made of basalt with hard texture, rough surface and good embedding and extruding capacity, is clean, dry and rough in surface, and meets the quality index requirement. The fine aggregate is rolled by fresh hard limestone, and is washed by water in the processing process, so that the fine aggregate is clean, hard, dry, free of weathering, free of impurities and other harmful substances, and meets the requirement of particle grading. The mineral powder is fresh mineral powder obtained by grinding limestone, does not contain soil impurities, is dry, clean and free from agglomeration, can freely flow out of a mineral powder bin, and is ground by limestone crushed stone with the thickness of more than 4.75 mm. In order to improve the water stability of the asphalt mixture, cement is used as a filler to replace equal amount of mineral powder, and the using amount of the cement is 2%. The anti-stripping agent is added into the asphalt mixture to increase the water stability of the asphalt mixture, and the technical index of the asphalt mixture meets the requirement. The fiber stabilizer adopts lignin flocculent fibers, the lignin flocculent fibers have strong asphalt adsorption capacity, good construction dispersibility and more fiber number per unit mass, and the doping amount is 0.3 percent of the total mass percentage of the asphalt mixture. The quality of the lignin fiber meets the requirement, and the lignin fiber is thrown in a mechanical adding mode.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (7)
1. The utility model provides a road surface structure based on bituminous concrete upper surface layer construction in rainy moist area, characterized by: comprises a water stable subbase layer (1), a stable base layer (2), a waterproof coiled material (3), an asphalt synchronous macadam seal layer (4) and an asphalt concrete upper surface layer (5) which are arranged from bottom to top in sequence;
guiding gutter (6) have been seted up to synchronous rubble seal (4) top surface of pitch, asphalt concrete upper strata (5) are SMA-13 asphalt concrete upper strata, SMA-13 asphalt concrete upper strata is filled in guiding gutter (6), guiding gutter (6) set up along the horizontal direction of road surface, guiding gutter (6) are the arc and highly reduce gradually to both ends by the middle part.
2. The pavement structure constructed on the basis of the asphalt concrete upper layer in the rainy and humid area as claimed in claim 1, wherein: u-shaped steel (7) is arranged in the diversion trench (6), the outer surface of the U-shaped steel (7) is fixed to the side wall of the diversion trench (6), and the U-shaped steel (7) is arranged along the length direction of the diversion trench (6).
3. The pavement structure constructed on the basis of the asphalt concrete upper layer in the rainy and humid area as claimed in claim 2, wherein: the guide grooves (6) are arranged in a plurality, the guide grooves (6) are arranged along the longitudinal direction of the road surface, and the interval between every two adjacent guide grooves (6) is 50-120 cm.
4. The pavement structure constructed on the basis of the asphalt concrete upper layer in the rainy and humid area as claimed in claim 1, wherein: the asphalt synchronous macadam seal coat (4) and the contact surface of the asphalt concrete upper surface layer (5) are cambered surfaces, and the heights of the asphalt synchronous macadam seal coat and the asphalt concrete upper surface layer are gradually reduced from the middle parts to the two sides of the pavement.
5. The pavement structure constructed on the basis of the asphalt concrete upper layer in the rainy and humid area as claimed in claim 4, wherein: waterproofing membrane (3) are the arc and by the middle part to road surface both sides height reduce gradually.
6. The pavement structure constructed on the basis of the asphalt concrete upper layer in the rainy and humid area as claimed in claim 5, wherein: the thickness of the asphalt concrete upper surface layer (5) at the central line of the pavement is 18cm, the thickness of the asphalt synchronous broken stone seal layer (4) at the central line of the pavement is 4cm, the thickness of the cement stabilized base layer (2) at the central line of the pavement is 36cm, and the thickness of the cement stabilized base layer (1) is 20 cm.
7. The pavement structure constructed on the basis of the asphalt concrete upper layer in the rainy and humid area as claimed in claim 6, wherein: the depth of the flow guide groove (6) is 2 cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021146909.5U CN212641086U (en) | 2020-06-19 | 2020-06-19 | Road surface structure based on asphalt concrete upper surface layer construction in rainy and humid areas |
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| CN202021146909.5U CN212641086U (en) | 2020-06-19 | 2020-06-19 | Road surface structure based on asphalt concrete upper surface layer construction in rainy and humid areas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957762A (en) * | 2021-11-08 | 2022-01-21 | 湖南交通国际经济工程合作有限公司 | Construction method of water-permeable cement concrete pavement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957762A (en) * | 2021-11-08 | 2022-01-21 | 湖南交通国际经济工程合作有限公司 | Construction method of water-permeable cement concrete pavement |
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