土圧・土留め (2)

[III-19] Field experiments on non-destructive testing method using vibration for evaluating residual tensile force of ground anchors

*Hideki Saito¹, Mitsuru Yamazaki², Atsushi Yashima³, Naoto Ogawa¹, Takamasa Niibe¹ (1. Oyo, 2. Central Nippon Highway Engineering Nagoya, 3. Gifu Univ.)

Keywords:ground anchor, residual tensile force, string, resonant frequency, sweep, spectrogram