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引用次数: 0
摘要
Wang 等人（2024 年）提出了一种通过三轴试验测量土壤刚度的新方法。本讨论说明了所提方法的一些局限性，并详细介绍了为提高其能力而对图像后分析过程进行的若干修改。这些修改包括：采用真正的立体摄影测量法确定相机和三轴细胞壁的方向；采用光学射线追踪技术进行光学射线重建；采用三维数字图像相关技术（3D-DIC）生成全场二维（2D）点云。通过这些改进，新方法的能力得到显著提高，从仅测量局部应变提高到更高精度和分辨率的全场变形测量。
Discussion of “A 3D image-based method to measure soil stiffness in triaxial tests” by Wang et al. 2024 (DOI: /10.1007/s11440-023-01977-3)
Wang et al. (2024) proposed a new method to measure soil stiffness through triaxial tests. This discussion illustrates some limitations of the proposed method and details several modifications on the post-image analysis process to enhance its capability. These modifications include the introduction of true stereophotogrammetry for camera and triaxial cell wall orientation, optical ray tracing technique for optical ray reconstruction, and three-dimensional digital image correlation (3D-DIC) for full-field two-dimensional (2D) point cloud generation. With these modifications, the capability of the new method can be significantly improved from only local strain to full-field deformation measurement at a higher accuracy and resolution.
期刊介绍：
Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.
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