Flexible roadbed asphalt concrete structure and construction method thereof

Abstract

The invention discloses a flexible roadbed asphalt concrete structure which comprises a sub-base layer, a base layer, an anti-fatigue asphalt layer, a tension-compression transition layer, an asphaltmiddle-lower surface layer and an asphalt upper surface layer, the sub-base layer is arranged at the bottommost layer of the roadbed asphalt concrete structure; the base layer is arranged on the upperlayer of the sub-base layer; the anti-fatigue asphalt layer is arranged on the upper layer of the base layer; the tension-compression transition layer is arranged on the upper layer of the anti-fatigue asphalt layer; the asphalt middle-lower surface layer is arranged on the upper layer of the tension-compression transition layer; the asphalt upper surface layer is arranged on the upper layer of the asphalt middle-lower surface layer. According to the invention, a structural scheme of the waterproof anti-rut asphalt upper surface layer, the asphalt middle-lower surface layer, the tension-compression transition layer and the anti-fatigue asphalt layer is determined, three structural form parameters of the structural scheme are designed and demonstrated, and the flexible base asphalt pavement with excellent performance is provided.

Description

technical field [0001] The invention relates to the field of road surface construction, in particular to a flexible roadbed asphalt concrete structure and a construction method thereof. Background technique [0002] The roads in the port area mostly use cement pavement to meet the heavy load requirements. The large number of joints in the cement pavement provide a sufficient way for water to enter the pavement structure, which leads to the weakness and hollowing out of the structural foundation. However, once the cement pavement becomes weak and empty, its service life will drop sharply, and the maintenance of the cement pavement after damage is very difficult, which is manifested in a large amount of work, a long construction period and high costs. [0003] Compared with cement concrete pavement, asphalt pavement has a series of advantages such as continuous, seamless, high flatness, low noise and low dust. It has become an inevitable development trend to transform cement p...

AI Technical Summary

Problems solved by technology

From the perspective of mechanical properties, the mechanical properties of semi-rigid bases are easily affected by factors such as environment, construction, and heavy loads. The constant changes in its own strength and the complexity of internal damage development make it difficult to accurately predict its service life and service state. This is also the core reason for the lack of precision in the design of semi-rigid base asphalt pavement and the difficulty in decision-making in later maintenance

From the perspective of operation and maintenance, the semi-rigid base is the main bearing layer of the asphalt pavement. The occurrence of its disease will have a fatal impact on the service life of the entire pavement structure. Due to the concealment of the semi-rigid base, there is currently no effective evaluation method for its performance status. , there is also a lack of effective treatment methods for its structural diseases, which makes it difficult to effectively maintain the pavement structure. Once the damage occurs, it will be difficult to maintain later, the maintenance period is long, and the maintenance cost is high

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