The Application of the Rayleigh Wave in Subgrade Layer Detection

Abstract

Based on LabVIEW platform, a highway nondestructive detection system was developed to detect highway subgrade layer and strcture characteristic. The integral principle of this system is dispersion characteristics of Rayleigh wave in different medium and the pronounced relationship between propagation velocity of Rayleigh wave and physical-mechanical properties of the medium. Using this test system to conduct a field test on a highway in Henan province and comparing the results with the actual situation, the results validated the practicability and reliability of the system.

Real-time monitoring for road-base quality with the aid of buried piezoelectric sensors

“…In the last 20 years, researches (Malla and Joshi, 2008; Sun et al, 2016) have improved the modulus back-calculation methodology using a more accurate model. On the other hand, Ummin et al (2013) adopted the Rayleigh wave for the nondestructive testing of roads and Jia and Li (2012) performed a back-calculation of the road-base modulus by the measured Rayleigh wave velocity. However, all of the above methods use a drop hammer as the excitation input, and thus the road-base modulus cannot be acquired in real time.…”