Risk analysis for urban excavation: a FAHP-VIKOR hybrid method

Abstract

The construction of urban excavation involves several potential risks, and the application of scientific methodologies is necessary for a reliable risk assessment. This paper proposes a novel risk assessment framework for urban excavation that combines the fuzzy analytic hierarchy process (FAHP) with the multi criteria compromise solution ranking (VIKOR) approach. FAHP is utilised to determine the weights of risk factors and identify high risk factors, and VIKOR is employed to evaluate the risk level of urban excavation. The proposed method comprises five key components: information source collection, risk-factor rating, weight calculation, establishment of project classification standards, and project feedback. By comprehensively considering the weights of various evaluation indicators and the superiority or inferiority of different factors, this method provides comprehensive risk assessment results. The effectiveness and feasibility of the proposed method are validated through a real case conducted in Nanning, China. The FAHP-VIKOR risk assessment method offers scientific decision support for urban excavation construction and serves as a valuable reference for risk reduction and ensuring construction safety.