Assessing Barrette Wall Stability in Critical Sections during Excavation Using Statistical Testing

In the context of rapid urbanization, the structural integrity of deep excavations is paramount, especially in geotechnically complex urban environments. This study investigates the stability of barrette walls - a prevalent form of deep foundation used to support large structures in dense urban areas. Employing the Finite Element Method (FEM), this research simulates the interactions of barrette walls during critical excavation phases, focusing on predicting and mitigating potential failures. The study integrates empirical data from multiple urban excavation sites, facilitating a detailed understanding of the forces and deformations that barrette walls withstand during excavation. Notably, the study highlights horizontal (Uy) and vertical (Uz) displacements as primary indicators of potential structural issues. The maximum horizontal displacement observed was 48.4 mm, and the maximum vertical displacement was 23 mm at the deepest excavation stage. The use of ANOVA and Games-Howell post-hoc tests validates the statistical significance of these findings, with p-values consistently reported as zero, reinforcing the reliability of the study predictive models. This research offers practical strategies for safer urban excavations, improving construction practices and reducing disruptions. It establishes a robust framework for future geotechnical studies, significantly contributing to urban infrastructure project efficiency and public safety.