2023 Volume 79 Issue 12 Article ID: 22-00333
Measurement of ground deformation during shield tunneling is important. In this paper, we propose a method to measure ground deformation caused by shield tunneling in real time and nondestructively using ground penetrating synthetic aperture radar (GB-SAR). GB-SAR does not require the installation of targets or other equipment at the measurement points, and thus enables continuous measurement of ground deformation even under construction conditions where entry into the construction site is restricted. The usefulness of this method was verified using actual measurements obtained during a shield construction project that passed directly under an airport facility, which has many restrictions on the measurement of ground deformation, and the method was shown to control the radar wave irradiation angle, which controls the measurement accuracy of GB-SAR, as well as points to be considered to improve the measurement accuracy.
