Abstract: In response to the pavement quality control requirements of asphalt concrete core walls, this study develops a real-time lift thickness detection and positioning device based on GNSS technologies and high-accuracy ultrasonic distance measurements, and formulates a real-time calculation method of determining lift thickness and pavement roughness. For dynamic monitoring and accurate positioning of lift thickness and pavement roughness, we also develop a corresponding real-time monitoring system that can display automatically the thickness and roughness profiles at the longitudinal sections of the core wall and broadcast an alarm to remind the construction personnel in time when the pavement is unqualified. Application to a real project shows very small errors in both the thickness and roughness measured by the device, meeting the required control accuracy. The proposed system achieves a real-time, remote, and synchronous monitoring of construction process, thus proving effective in the lean management and quality control of asphalt concrete core wall pavement.

Key words: asphalt concrete core wall, quality control, lift thickness, pavement roughness, real-time monitoring