Risk assessment research on the application of improved analytic hierarchy process in building foundation pit based on fault tree model

Foundation pit engineering plays an important role in infrastructure construction, but the collapse of support structure of the foundation pit often occurs. This paper takes the structural importance in the fault tree as the basis of the analytic hierarchy judgment matrix, pointing out that the construction process planning is the most important for the foundation pit engineering. The improved analytic hierarchy process (AHP) helps to reduce subjectivity, which is used to conduct the risk assessment of the collapse of the support structure of the foundation pit. In this way, this paper provides reference for the risk evaluation of the foundation pit engineering.