... the suitability of the bedrock for the final disposal. A high-resolution 3D reflection seismic imaging survey was conducted in 2009 at a depth of app. 350 m. Lines 240m long were measured, with source stations spaced at 1m and receivers at 3m, respectively. Measurements were conducted with a hydraulic impact...

... is drying method, neutron scattering method,Y-ray method and time domain reflect-meter (TDR) method [4–5]. However, these methods in the application of tunnel have various deficiencies, such as narrow scanning area, complicated handling and so on [6–7]. Searching for a fast and efficient method of measuring...