Fast Image-based Geological Logging Method of Small Size Tunnel

Abstract

In the field of engineering geological logging, image-based geological logging achieves the tunnel, slope, excavation and other surfaces’ digital informatization, but the exiting methods of image-based geological logging cannot apply to the small size tunnel because of its special characteristics. In order to actualize image-based geological logging in the small size tunnel, this paper introduces novel methods of image-based geological logging based on parallel image sequence of the small tunnel, including image acquisition, image orientation control, image geometric correction, unfolded image map generation and geological attitude measurement, finally generating the display map of geological logging. The tunnel simulating experiment shows that the use of the image-based geological logging methods in the small tunnel proposed in this paper could acquire image data of the small tunnel rapidly and improve the geological logging work’s efficiency in the small tunnel.