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Abstract

To accurately control the crack diseases of semi-rigid base pavement structures in cold regions, this paper applied the theory of mathematical statistical analysis to investigate and statistically analyze the 66 km pavement crack data of two highways. Meanwhile, data analysis was adopted to study the correlation between surface cracks and base cracks, and the prevention and control effect of asphalt-stabilized cobble replacement on cracks in the original 20 m/lane pre-cut cracks and damaged base was analyzed. The results show that the pavement structure consists of a 16 cm asphalt surface layer and a 36 cm cement-stabilized cobble base layer. The proportion of reflection cracks in the surface transverse cracks is 76%, while that of longitudinal cracks that penetrate the base layer in the surface longitudinal cracks is 14%. The longitudinal crack diseases are more likely to occur along the wheel track direction on both sides of the base layer transverse cracks, and continue to propagate along the tip of the longitudinal cracks. The pavement structure consists of a 12 cm asphalt surface layer and a 20 cm cement-stabilized cobble base layer, with transverse cracks in the surface layer and longitudinal cracks in the base layer corresponding one by one. Additionally, 53% of the pre-cut cracks in the semi-rigid base layers will reflect to the surface layers, forming transverse cracks in the surface layers. Replacing damaged base layers with asphalt-stabilized cobble can prevent the propagation of crack tips in the base layers and eliminate reflection crack diseases.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2023.06.011

First Page

68

Last Page

73

Submission Date

March 2025

Reference

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