Reconstruction of a Retention Pond Sheet Pile Wall Due to Altered Loading Pattern: PLAXIS 2D Simulation Study

Retaining wall sheet pile is a vertical structure used to support soil and prevent erosion or collapse, renowned for its lightweight design, ease of installation, and effectiveness in providing excavation support for applications like water barriers and cofferdams. The aim of the study is the reconstruction of the retention pond wall due to instability of the sheet pile wall caused by overburden stress and altered loading patterns. These altered loading patterns affect both the front and the back sides of the sheet pile wall, leaving it unstable and unable to handle the increased load. To resolve this, the retention pond must be evaluated to determine the total, horizontal, and vertical deflections of the sheet pile wall at different water levels and overburden stresses. This study used PLAXIS 2D to analyze the problems faced by the sheet pile wall of the retention ponds and to identify feasible solutions. In PLAXIS 2D, validate the horizontal deflection of the sheet pile wall within the permissible limit range (10 mm to 100 mm) to formulate an optimized sheet pile wall configuration by simulating the embedded double sheet pile from 4 m to 7m depth. The results obtained from the optimized double sheet pile wall design successfully adhered to the permissible deflection limit of below 100 mm, ensuring structural stability and suitability for retention pond applications. The analysis demonstrated that the design could effectively withstand the geotechnical and hydraulic conditions. Hence, deepen the sheet pile wall to maintain soil stability. PLAXIS 2D proved the significance of simulation in predicting soil conditions. In conclusion, the analysis showed that the design can effectively operate within geotechnical and hydraulic constraints, making it a dependable and feasible alternative for improving the stability and functionality of retention ponds.