1
|
Matsumura S, Kondo A, Nakamura K, Mizutani T, Kohama E, Wada K, Kobayashi T, Roy N, Frost JD. 3D image scanning of gravel soil using in-situ X-ray computed tomography. Sci Rep 2023; 13:20007. [PMID: 37973873 PMCID: PMC10654387 DOI: 10.1038/s41598-023-46772-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 11/04/2023] [Indexed: 11/19/2023] Open
Abstract
A typical ground investigation for characterizing geotechnical properties of soil requires sampling soils to test in a laboratory. Laboratory X-ray computed tomography (CT) has been used to non-destructively observe soils and characterize their properties using image processing, numerical analysis, or three-dimensional (3D) printing techniques based on scanned images; however, if it becomes possible to scan the soils in the ground, it may enable the characterization without sampling them. In this study, an in-situ X-ray CT scanning system comprising a drilling machine with an integrated CT scanner was developed. A model test was conducted on gravel soil to verify if the equipment can drill and scan the soil underground. Moreover, image processing was performed on acquired 3D CT images to verify the image quality; the particle morphology (particle size and shape characteristics) was compared with the results obtained for projected particles captured in a two-dimensional (2D) manner by a digital camera. The equipment successfully drilled to a target depth of 800 mm, and the soil was scanned at depths of 700, 750, and 800 mm. Image processing results showed a reasonable agreement between the 3D and 2D particle morphology images, and confirmed the feasibility of the in-situ X-ray CT scanning system.
Collapse
Affiliation(s)
- Satoshi Matsumura
- Geotechnical Engineering Division, Port and Airport Research Institute, National Institute of Maritime, Port and Aviation Technology, 3-1-1 Nagase, Yokosuka, Kanagawa, 239-0826, Japan.
| | - Akihiko Kondo
- Earthquake and Structural Dynamics Group, Earthquake Disaster Prevention Engineering Division, Port and Airport Research Institute, National Institute of Maritime, Port and Aviation Technology, 3-1-1 Nagase, Yokosuka, Kanagawa, 239-0826, Japan
| | - Keita Nakamura
- Geotechnical Engineering Division, Port and Airport Research Institute, National Institute of Maritime, Port and Aviation Technology, 3-1-1 Nagase, Yokosuka, Kanagawa, 239-0826, Japan
| | - Takaaki Mizutani
- Geotechnical Engineering Division, Port and Airport Research Institute, National Institute of Maritime, Port and Aviation Technology, 3-1-1 Nagase, Yokosuka, Kanagawa, 239-0826, Japan
| | - Eiji Kohama
- Earthquake and Structural Dynamics Group, Earthquake Disaster Prevention Engineering Division, Port and Airport Research Institute, National Institute of Maritime, Port and Aviation Technology, 3-1-1 Nagase, Yokosuka, Kanagawa, 239-0826, Japan
| | - Kenji Wada
- Tsukuba Technology Co., Ltd., 1-14-11 Sengen, Tsukuba, Ibaraki, 305-0047, Japan
| | - Taizo Kobayashi
- Department of Civil and Environmental Engineering, College of Science and Engineering, Ritsumeikan University, 1-1-1 Noji-Higashi , Kusatsu, Shiga, 525-8277, Japan
| | - Nimisha Roy
- College of Computing, Georgia Institute of Technology, #253, 801 Atlantic DR NW, Atlanta, GA, 30332, USA
| | - J David Frost
- School of Civil and Environmental Engineering, Georgia Institute of Technology, #2285, 790 Atlantic Drive, Atlanta, GA, 30332, USA
| |
Collapse
|
2
|
Wang S, Wei Z, Ji S. Investigation of the flow characteristics of spherical harmonic particles using the level set method. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.118069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|