Optimization of Barrette Wall Depths for Urban Excavation Stability Using FEM and ANOVA Testing

This article explores the optimization of barrette wall depths in deep excavation projects with a focus on enhancing both economic and structural efficiency. Deep excavations in urban environments pose significant geotechnical challenges that necessitate advanced engineering strategies to ensure structural stability and safety. The purpose of this research is to determine the optimal depth for barrette walls that balances cost, complexity, and stability. The methodology combines Finite Element Method (FEM) simulations with rigorous statistical analyses, including the Games-Howell post-hoc test, to assess the impacts of different wall depths (20m, 25m, and 30m) on the stability and integrity of deep excavation sites. The principal results indicate that a depth of 25 meters offers the most advantageous balance, showing significantly better performance in terms of stability and stress distribution compared to shallower depths, while further increases to 30 meters that yield diminishing returns. Major conclusions highlight that optimizing barrette wall depths can improve the safety and economic efficiency of urban infrastructure projects. This research contributes valuable knowledge to the field of geotechnical engineering, particularly in urban areas where such excavations are critical. The study emphasizes new aspects by integrating both economic and structural considerations into the optimization process. Research limitations include the specific geological conditions considered, which may affect generalizability. Practical implications suggest that adopting a 25-meter depth can lead to cost savings and enhanced stability, making it a practical guideline for future projects. Social implications involve the potential for safer urban development practices that minimize risk and maximize resource efficiency.