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Related Experiment Video

Updated: Jan 10, 2026

Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
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A width centric image to mechanics framework for assessing advance grouting with TMSE adaptive width segmentation and

Pengcheng Zhu1, Zhilei Zhang2, Tielin Chen3

  • 1Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing, 100044, China.

Scientific Reports
|November 20, 2025
PubMed
Summary

This study introduces an image-based framework to analyze grout veins, improving stiffness and permeability estimations for screening applications. While accurate, the method requires further refinement for critical design decisions.

Keywords:
Fracture groutingGraph theoryImage segmentationPost-grouting evaluationWidth measurement

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Area of Science:

  • Geotechnical Engineering
  • Image Analysis
  • Material Science

Background:

  • Grout veins significantly impact bulk stiffness and permeability.
  • Accurate characterization of these veins is crucial for understanding material properties.

Purpose of the Study:

  • To develop and validate a width-centric, image-to-mechanics framework for analyzing grout veins.
  • To improve the estimation of bulk stiffness and permeability influenced by grout veins.

Main Methods:

  • Utilized SES preprocessing with HDMR-based multi-feature fusion and a moment-based sub-pixel localizer.
  • Extracted graph-theoretic centerlines and estimated vein widths via T_MSE-adaptive segmentation.
  • Applied the framework to a lab-scale image set with seven backbones for segmentation improvement.

Main Results:

  • The framework successfully improved segmentation of grout veins.
  • Resulting width and orientation statistics yielded laboratory-scale estimates of elastic modulus and permeability.
  • Worst-case errors were 8.83% for modulus and 10.42% for permeability.

Conclusions:

  • The developed method is suitable for screening and monitoring under controlled conditions.
  • The current accuracy does not meet design-grade tolerances for critical applications.
  • Assumptions and parameters for reproducibility, including edge profile and 2D analysis, were clarified.