a School of Civil Engineering, Shaoxing University, Shaoxing, 312000, China
b School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing, 100083, China
c School of Civil and Environmental Engineering, Ningbo University, Ningbo, 315000, China
2023, 15(1): 204-215. doi:10.1016/j.jrmge.2022.02.013
Received: 2021-10-07 / Revised: 2022-01-03 / Accepted: 2022-02-23 / Available online: 2022-04-12
2023, 15(1): 204-215.
doi:10.1016/j.jrmge.2022.02.013
Received: 2021-10-07
Revised: 2022-01-03
Accepted: 2022-02-23
Available online: 2022-04-12
This study presents a visualized approach for tracking joint surface morphology. Three-dimensional laser scanning (3DLS) and 3D printing (3DP) techniques are adopted to record progressive failure during rock joint shearing. The 3DP resin is used to create transparent specimens to reproduce the surface morphology of a natural joint precisely. The freezing method is employed to enhance the mechanical properties of the 3DP specimens to reproduce the properties of hard rock more accurately. A video camera containing a charge-coupled device (CCD) camera is utilized to record the evolution of damaged area of joint surface during the direct shear test. The optimal shooting distance and shooting angle are recommended to be 800 mm and 40°, respectively. The images captured by the CCD camera are corrected to quantitatively describe the damaged area on the joint surface. Verification indicates that this method can accurately describe the total sheared areas at different shear stages. These findings may contribute to elucidating the shear behavior of rock joints.
Keywords: Rock joint, Shear test, Three-dimensional printing (3DP), Three-dimensional laser scanning (3DLS), Visualization approach
Man Huang
Dr. Man Huang is presently working as a professor in Shaoxing University, Zhejiang Province, China. He obtained his PhD from Tongji University, China. His research focuses on the mechanical characteristics of rock joint including joint surface roughness and size effect of shear strength. He has chaired and participated in a number of National Natural Science Foundation and published more than 60 papers in the domestic and international journals. He was granted the Second Prize of National Technology Invention, the First Prize of Zhejiang Technology Invention and the First Prize of Zhejiang Technology Progress Award. He is a member of International Society for Rock Mechanics and Rock engineering (ISRM) and Chinese Society for Rock Mechanics and Engineering (CSRME).