Morphological Reconstruction for the Internal Structure of In-Situ SoilRock Mixture Through Ultrasonic Transmission Imaging Experiments

Aiming at the problem of real-time visualization analysis of the internal structural morphological characteristics for in-situsoil-rock mixture, an experimental system for the ultrasonic transmission imaging analysis of soil-rock mixture was constructed, and a morphological reconstruction method of internal structures for the in-situ soil-rock mixture was proposed by using multiple ultrasonic profile images. The system device and its analysis method can obtain series of profile images of internal structures for insitu soil-rock mixture. First, the image processing method is used to analyze the characteristics of the imaging spots and the bright bands of the internal structure, and the feature map of the bright band in the image is obtained. Second, the ratio of pixel points in the non-zero region of bright spot band to whole pixel points in the feature map is obtained, and the ratio is taken as the pore space ratio of the dual structure in the soil-rock mixture. Last, the evaluation of pore space ratio and the reconstruction of boundary structure morphology inside the soil-rock mixture can be realized according to the feature map and the pore space ratio of light spot and bright band. This method effectively solves the real-time analysis and 3D reconstruction problems of soil-rock mixture structures when the simulation method is complicated and lacks the actual internal profile image or the measured structure data.