Semi-rigid base layer anti-cracking pavement structure and construction method suitable for high-temperature-difference area

Abstract

The invention discloses a semi-rigid base layer anti-cracking pavement structure and construction method suitable for a high-temperature-difference area. The pavement structure comprises face layers, base layers and pre-cracking cracks. The base layers and the face layer are arranged from bottom to top in sequence, the base layers comprise a lower base layer and an upper base layer, the face layers comprise a lower face layer and an upper face layer, and the lower face layer is arranged above the upper base layer; the base layers are internally provided with a plurality of the pre-cracking cracks, each pre-cracking crack comprises a pre-cut crack, a crack pouring material and a crack attaching material, the crack opening at the upper end of each pre-cut crack of each pre-cracking crack is flush with the upper end face of the upper base layer, the lower end of each pre-cut crack of each pre-cracking crack penetrates through the upper base layer and is arranged in the lower base layer, the crack pouring materials are poured into the pre-cut cracks of the pre-cracking cracks, and the upper end face of the upper base layer is provided with the crack attaching materials tightly attached to the crack openings at the upper end of the pre-cut cracks correspondingly. According to the semi-rigid base layer anti-cracking pavement structure and the construction method suitable for the high-temperature-difference area, cracks generated in the construction and maintenance period and the operation period of the semi-rigid base layers are actively controlled, the expansion rule in the pavement structure is changed, and damage, caused by crack reflection, to pitch pavement can be effectively lowered.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a semi-rigid base anti-crack pavement structure and construction method suitable for areas with high temperature differences. Background technique [0002] In the past two decades, my country's highway construction has developed rapidly, the road network layout has been gradually improved, and the technical level has been continuously improved, which has strongly supported the sustained and rapid development of society and economy. But at the same time, the high-speed and heavy-duty road transportation has brought severe challenges to the construction and operation of road infrastructure. Under heavy load conditions, in order to reduce the dynamic impact of vehicle loads on the subgrade, semi-rigid bases are widely used in my country, and my country has accumulated a lot of experience in the construction and use of semi-rigid pavements. However, in practice, engineers found that ...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem of crack reflection existing in the existing semi-rigid asphalt pavement structure, to provide a semi-rigid base crack-resistant pavement structure and construction method suitable for areas with high temperature differences Actively control the cracks generated during the period, change the expansion law in the pavement structure, and effectively reduce the damage caused by crack reflection to the asphalt pavement

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