Embedded structured asphalt pavement and construction method thereof

Abstract

The invention relates to an embedded asphalt pavement structure, and particularly relates to an asphalt pavement structure which can bear heavy traffic and has a good anti-rutting effect. An asphalt surface layer is composed of an upper surface layer, a middle surface layer and a lower surface layer, wherein the lower surface layer is a net structure formed by compounding a geonet and concrete prism blocks; and an asphalt mixture of the middle surface layer is embedded between concrete prism block gaps and the geonet of the lower surface layer. The concrete prism blocks have relatively high strength and structural stability, and have a regular shaped bottom surface capable of providing a relatively large bearing surface and reducing pressure on a base layer; the lower surface layer and themiddle surface layer are mutually embedded to form the asphalt pavement structure with two layers of mutually embedded structures; the concrete prism blocks of the lower surface layer are limited bypulling of the geonet and embedding of the asphalt mixture of the middle surface layer, so that displacement and deformation are not easy to occur under the action of heavy traffic load; and a relatively thick asphalt mixture is arranged at the gaps of the concrete prism blocks, so that reflection of shrinkage cracks of the base layer can be resisted, and a bearing capacity of an asphalt pavementis improved on a structural aspect.

Description

technical field [0001] The invention relates to an asphalt pavement with a mosaic structure, which belongs to the field of highway and urban road engineering, in particular to an asphalt pavement structure capable of bearing heavy traffic and having good anti-rutting effect. Background technique [0002] Asphalt pavement is a flexible pavement structure, which has the advantages of comfortable driving and low noise, and is widely used in highways and urban roads. According to the "Code for Design of Highway Asphalt Pavement", the structural layer of asphalt pavement consists of three parts: surface layer, base layer and subbase layer. The pavement not only bears the load of the wheels, but also is affected by natural environmental factors. Due to the influence of the traffic load and atmospheric factors on the pavement, it generally weakens gradually with the depth. Therefore, the pavement is usually a multi-layer structure. It is laid on the upper layer with higher stress,...

AI Technical Summary

Problems solved by technology

The climbing wheels of heavy-duty vehicles on the uphill road section produce a large horizontal friction force on the road surface, and the flexible road surface has poor ability to bear horizontal force, and it is easy to cause road surface damage

The stone in the asphalt mixture exerts a downward force under the action of the load. The stone is irregular in shape and has a small bottom area, which generates a large pressure on the lower part. The sharp-edged stone in the lower layer is pressed on the base layer, which is easy to cause Damage to the base layer, leading to breakage of the asphalt surface

[0004] In addition, the cement-stabilized base commonly used in the prior art is a semi-rigid structure, and there are some technical defects: due to the influence of temperature expansion and contraction, the temperature shrinkage cracks produced by the cement-stabilized base are inevitable, and the reflection caused by the asphalt pavement Cracks have become one of the most important factors affecting the service life of roads

In order to reduce the shrinkage cracks of the cement-stabilized structural layer, the amount of cement in the base layer is strictly limited, which limits the impact fatigue resistance of this structure.

At present, asphalt pavement overlay is also widely used to reconstruct concrete pavement, but the concrete pavement is used as the base layer of asphalt pavement, the original transverse joints and longitudinal joints are reflected to the asphalt pavement, causing cracks in the asphalt pavement, which is the old concrete pavement. Difficult Technical Problems in Paving Asphalt

[0005] Increasing the aggregate particle diameter of the asphalt mixture in the surface layer and increasing the thickness of the asphalt surface layer can improve the bearing capacity of the asphalt surface layer and can resist the reflection of shrinkage cracks. Bring other diseases, the cost of asphalt mixture is high, the actual project will not blindly increase the thickness of asphalt pavement to solve the problem of damage to asphalt pavement under heavy traffic

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