Improved Fuzzy Comprehensive Evaluation with AHP in Construction Risk Assessment: A Case Study of Tunnel Boring Machine at High Altitude

Abstract

As an integral part of construction engineering, tunnel construction is featured by its complex construction environment. The operation in tunnel construction can be affected by many factors and it affects the quality of construction work, even major safety accidents can be caused by the irrational operation. This paper uses an improved fuzzy comprehensive evaluation method to assess the construction risk of tunnel boring machine (hereinafter referred to as TBM) at high altitude. There is little case that uses tunnel boring machine for construction at high altitude in China, and the related overseas researches are still less. The results show that this method can give quantitative indicators of the risks in the operation. And the main risk sources of the project can be identified. Therefore, we can provide reliable reference data for management of tunnel construction at high altitude, so as to reduce or avoid construction risks through a variety of management schemes.