Risk Assessment on the Construction of Vacuum-Aided Concrete Filled Steel Tube Pouring

Abstract

The construction of concrete-filled steel tube (CFST) pouring is a key process in the building of CFST arch bridges, directly affecting engineering quality and structure safety. However, the construction of CFST pouring has complex procedures and multiple risk sources, and major engineering problems often arise from incorrect risk assessment. In order to reasonably analyze the hazards of various risk sources to engineering, avoid major engineering problems, and improve engineering quality, risk assessment is conducted on the construction of CFST pouring in this paper. First, As Low As Reasonably Practicable (ALARP) and risk assessment matrix are introduced, and statistics are made of the occurrence probability and risk loss rating of three major risks in the construction of CFST pouring, resulting in one I-level risk, two II-level risks, five III-level risks, and two IV-level risks. Finally, seven unacceptable events requiring special attention from decision-makers are obtained through ALARP. The results of risk assessment can be used as a basis for the construction management of practical projects, and major risks are strictly controlled through strengthening management and other methods, which will effectively reduce risk levels, providing a powerful guarantee for increasing the span of CFST arch bridges.