Pavement reinforcement structure

Abstract

The invention discloses a pavement reinforcement structure. The structure comprises a water-permeable asphalt surface layer, a lower sealing layer and a plurality of semi-rigid base layers, wherein alayer of geonet is arranged between every two adjacent semi-rigid base layers, the number of all the geonets is at least two, auxiliary positioning pieces used for assisting in positioning the positions of the geonets are arranged on the geonets, an Nth semi-rigid base layer is paved, then a layer of geonet is paved by adopting a full paving method, positioning is assisted by utilizing the auxiliary positioning pieces, a lower sealing layer between a lower surface of the water-permeable asphalt surface layer and an upper surface of the top semi-rigid base layer is set, an Mth layer of semi-rigid base layer is laid, and a second layer of gabion box is laid. If necessary, the laying process can be repeated till construction of the semi-rigid base layers is finished. The structure is advantaged in that fatigue, reflection, temperature and differential settlement crack diseases can be reduced, the service life of the pavement is greatly prolonged, the maintenance period is prolonged, so whole life cycle cost of the pavement is lower than that of a non-reinforced pavement.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a road surface reinforcement structure. Background technique [0002] Pavement cracks caused by the comprehensive influence of load and environment have become one of the most important structural damage forms of asphalt pavement. The existence of cracks destroys the integrity and continuity of the pavement structure, and leads to weakening of the structural strength to a certain extent. Under the action of external force, the cracks on the pavement will expand rapidly, and the road base will also be destroyed after rainwater infiltration and erosion, which greatly affects the quality and life of the road. [0003] The method of treating pavement cracking usually uses geotextiles and geogrids for reinforcement. It is usually laid on the interface between the asphalt layer and the underlying layer (such as the contact surface between the semi-rigid base and the asphalt ...

AI Technical Summary

Problems solved by technology

The test road built by using geotechnical reinforcement materials to treat asphalt pavement and prevent pavement cracking cannot achieve the treatment effect

Due to the different reinforcement parts, the arrangement position of the reinforcement material in the pavement structure is related to its effect. The existing reinforcement part is usually the bottom of the pavement surface layer, and it has been proved through practical application that the treatment effect cannot be achieved.

Moreover, the type of reinforcement used in geotechnical reinforcement affects the bonding state with the structural layer and affects the bonding effect

Compared with geonet and geogrid, the geotextile without holes and lack of embedding mechanism must have different bonding degree with the structural layer, and the poor bonding effect makes it impossible to control pavement cracking

In the application of geotechnical reinforcement materials to treat asphalt pavement construction, although people have adopted a variety of methods to ensure its connection with the structural layer, such as spraying sticky layer oil on the top and bottom of the geotextile or soaking asphalt oil in advance, or using self-adhesive materials, clean the surface of the semi-rigid base, but when the georeinforced materials are paved on the top surface of the semi-rigid base, they may still be pushed and folded under the accumulation of asphalt mixture and the rolling of the road roller, making them Inadequate bonding with the upper and lower structural layers

In addition, although this treatment method alleviates the reflection cracks of the asphalt pavement to a certain extent, it cannot prevent the shrinkage and cracking of the semi-rigid base.

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