Composite pavement structure and construction method thereof

Abstract

The invention discloses a composite pavement structure and a construction method thereof. The composite pavement structure comprises an upper asphalt concrete finishing coat and a lower old cement concrete slab layer, wherein the slab layer comprises a plurality of old cement concrete slab connection groups; and each connection group is formed by connecting a plurality of old cement concrete slabs by means of connecting parts arranged at the joints of the old cement concrete slabs. The construction method of the composite pavement structure comprises the following steps: firstly determining the connection type in the road section to be reconstructed based on the plan; secondly determining the arrangement type of rake nails at the joints; thirdly drilling rake nail holes corresponding to the rake nails in terms of quantity and space on the edges of the old cement concrete slabs at the two sides of the joints; fourthly implanting the rake nails and pouring epoxy cement mortars into the rake nail holes to fix the rake nails; fifthly sprinkling water to cover the old cement concrete slabs to cure and form the old cement concrete slab layer; and finally paving the asphalt concrete finishing coat on the old cement concrete slab layer, thus obtaining the composite pavement structure. The composite pavement structure has the advantages of good economical efficiency, obvious reflection crack resistance effect, good road property, long service life and the like, and is convenient for construction.

Description

technical field [0001] The invention relates to a pavement reinforcement and construction technology for reconstruction of old cement concrete pavement, in particular to a pavement reinforcement structure and a construction method thereof. Background technique [0002] Asphalt concrete overlay on the old cement concrete pavement is a commonly used method to transform the old cement concrete pavement. It is not only simple and convenient, but also can effectively improve the performance of the old cement concrete pavement and prolong its service life; at the same time, the cost It is low, has less impact on traffic and the environment, and is easy to maintain and repair. However, due to the joints in the old cement concrete pavement, the asphalt concrete overlay is prone to reflective cracks under the combined action of traffic load and environmental factors, which will affect the road performance and service life of the overlay to a certain extent. [0003] Road workers at ...

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Problems solved by technology

[0007] The effects of the methods (2) and (3) above are not ideal, and some engineering application practices show that their use may even be counterproductive, and will further accelerate the destruction of the overcoat;

[0008] (4) Crush the cement concrete road slab as a cushion or subbase, and re-pave the base and asphalt surface. Although the effect of this method is good, it completely breaks the old cement road The board structure function of the old pavement is not utilized, and the technical and economical efficiency is poor

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