Abstract
Recently, there has been an increase in the size, diversification, and specialization of the construction methods of underground sites, particularly due to the need for more efficient utilization of underground spaces in downtown sites where space is limited and land prices high. This study presents a number of procedures that can be used to review site constraints and constructability, and to evaluate the economic efficiency and safety of soil retaining walls in order to select the optimum wall for the given site conditions. Furthermore, this study presents a quantitative analysis model to determine whether the selected soil retaining wall is able to deal with the site risks by using the forced decision method and binary weighting analysis. The study also presents a process model in order to select the optimum soil retaining wall for the given site conditions through the analysis of constructability, economic efficiency, stability and risk factors.
