Interface Test Study on Asphalt Concrete Full-Section Waterproof Sealing Structure of High-Speed Railway

High-speed railways have extremely high requirements for smoothness and safety. The full-section asphalt concrete sealing layer is a new type of waterproof structure that can be used for high-speed railway subgrades. Therefore, higher requirements are put forward for the stability of the structural layer interface. In this paper, the interface relationship between the asphalt concrete layer and the base-slab of the track structure, the asphalt concrete layer and the surface layer of the subgrade, and the interface behavior of asphalt concrete layer with different engineering measures are studied through the interface test of the Beijing–Zhangjiakou high-speed railway. After compared with the interface effect of current high-speed railway concrete layer and graded gravel layer, the comparison results shown that the interface effect of asphalt concrete is sufficiently safe, which could provide an important reference for the application of full-section asphalt concrete in high-speed railways.