Optimization of dimension gravity walls and cantilever walls

One of the failures in retaining wall construction is caused by errors in design such as the dimensions of the planned retaining wall being too slender, causing collapse. However, dimensions that are too fat will cause waste. This confirms that optimization is very important when planning a retaining wall because with optimization, the optimal dimensions can be obtained according to the construction standards. In addition, the time requir d for planning retaining walls using optimization is also faster. This study aims to determine the optimal dimensions of retaining walls that meet security requirements. Retaining walls taken as samples are retaining walls that are commonly used in retaining construction projects, namely the gravity type and the cantilever type. Of the 2 types, the optimization of their external and internal stability was carried out using Microsoft Excel solver. The results of the analysis determined that the optimal design dimension for gravity walls that meet the requirements is only up to a height of 7 m. For walls with a height above 7 m, it is not safe. For cantilever walls, it is still safe up to a height of 12 m.