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Stability analysis of dam grouting reinforcement based on FLAC3D
1Engineering Department of Huanghe University of Science and Technology, Zhengzhou, China.
Plos One
|February 27, 2026
Summary
Grouting dangerous reservoir dams enhances stability by forming a grout curtain, reducing plastic zones by 23%. This numerical simulation provides crucial insights for dam safety evaluations.
Area of Science:
- Geotechnical Engineering
- Civil Engineering
- Dam Safety
Background:
- Reservoir dams pose significant safety risks, necessitating urgent grouting and strengthening.
- Evaluating the post-grouting stability of reinforced dams is critical for preventing failures.
Purpose of the Study:
- To analyze the stability of a dangerous reservoir dam after grouting reinforcement using numerical simulations.
- To evaluate the effectiveness of different grouting mechanisms (penetration, compression, splitting) in enhancing dam integrity.
Main Methods:
- Description of the action mechanisms of penetration, compression, and splitting grouting.
- Numerical simulation analysis using the FLAC3D finite difference program.
- Stability analysis of seepage control reinforcement for a specific dangerous reservoir.
Main Results:
- Formation of a complete grout curtain zone within the dam body post-grouting.
- Observed twofold adjustment of dam stress and a 23% decrease in the plastic zone area.
- Significant enhancement of overall dam body stability.
Conclusions:
- Grouting reinforcement effectively improves the stability and safety of dangerous reservoir dams.
- Numerical simulation provides a valuable tool for analyzing and evaluating the safety of similar dam reinforcement projects.
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