Numerical Investigation of Axial Behavior in Grouted Sleeve Repairs: Insights into Key Design Parameters

Grouted sleeves are commonly used for pipeline repairs involving localized defects. However, their application to address geohazard-induced strains is less established and needs further exploration. In this research, finite element analysis (FEA) is utilized to examine the axial strain behavior of grouted sleeve repair systems for defective pipelines, considering the influence of various design parameters. Key parameters, including repair length, grout thickness, material properties, interface friction, and sleeve characteristics, are systematically varied to evaluate their impact on load transfer and strain distribution. This study investigates their potential effectiveness for such scenarios. The results indicate that optimal repair length and grout thickness are crucial for minimizing strain, with diminishing benefits beyond certain thresholds. Higher grout stiffness reduces strain, while the modulus of elasticity and thickness of the sleeve significantly influence performance. Proper design balances strain reduction, material costs, and structural efficiency. This research provides actionable insights for optimizing grouted sleeve repairs, offering a framework for enhancing durability and cost-effectiveness in pipeline rehabilitation.