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<p>Infilled joints are critical geological elements that significantly influence the structural integrity and stability of rock masses. This comprehensive review examines the shear behavior of these joints, a key factor in ensuring the reliability of rock-based infrastructure and preventing geological disasters. We critically analyze existing research on infilled joint models and state assessment methodologies, with a focus on mechanical properties, deformation patterns, and shearing mechanisms. The review reveals that traditional methods for measuring infilling ratios are inconsistent—particularly for irregular joints—due to interval effects, leading to highly variable results. A distinct double shear behavior is identified in joints with specific morphological traits that are filled with ductile, low-strength, high-flow plastic materials, especially under thin-layer conditions. Statistical analysis indicates that the critical infilling ratio is variable and influenced by multiple factors, including infilling material properties, joint morphology, boundary conditions, and normal stress. Future research must develop robust techniques to measure infilling ratios that account for the three-dimensional characteristics of joints. Establishing optimal sampling intervals to achieve precise measurements without excessive workload is equally crucial. We advocate that future studies prioritize natural joints in experimental investigations. Additionally, comprehensive models incorporating joint morphology, infilling properties, normal stress, boundary conditions, and scale effects should be developed to accurately determine critical infilling ratios.</p>

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Advancing the Understanding of Infilled Joint Shear Behavior: A Review of Modeling, Measurement, and Influential Factors

  • 期刊论文

  • 发表日期：

    2025年5月5日

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  • Leibo Song,
  • Zhiyong Bai,
  • Quan Jiang,
  • Binghe Zhu,
  • Gang Wang,
  • Yanting Gu

摘要

Infilled joints are critical geological elements that significantly influence the structural integrity and stability of rock masses. This comprehensive review examines the shear behavior of these joints, a key factor in ensuring the reliability of rock-based infrastructure and preventing geological disasters. We critically analyze existing research on infilled joint models and state assessment methodologies, with a focus on mechanical properties, deformation patterns, and shearing mechanisms. The review reveals that traditional methods for measuring infilling ratios are inconsistent—particularly for irregular joints—due to interval effects, leading to highly variable results. A distinct double shear behavior is identified in joints with specific morphological traits that are filled with ductile, low-strength, high-flow plastic materials, especially under thin-layer conditions. Statistical analysis indicates that the critical infilling ratio is variable and influenced by multiple factors, including infilling material properties, joint morphology, boundary conditions, and normal stress. Future research must develop robust techniques to measure infilling ratios that account for the three-dimensional characteristics of joints. Establishing optimal sampling intervals to achieve precise measurements without excessive workload is equally crucial. We advocate that future studies prioritize natural joints in experimental investigations. Additionally, comprehensive models incorporating joint morphology, infilling properties, normal stress, boundary conditions, and scale effects should be developed to accurately determine critical infilling ratios.