Study on Risk Assessment of Pile Running for Large Diameter Piles Based on AHP-Fuzzy Method

Large-diameter pipe piles are more and more widely used in ocean engineering, while pile running may occur. Based on the analytic hierarchy process (AHP) and fuzzy method (fuzzy), this paper presents a method to evaluate the risk level of the pile running in offshore platform. Indices for evaluating pile running are classified into four types: pile, hammer, soil property and human factors. A three-scale comparison matrix is chosen, which is more favorable for engineers determining the weight of each evaluation index. A fuzzy model is established and the risk level membership of the pile running in each platform is determined. Nine platforms are used to verify the proposed method, and driving records of platforms show that the prediction is consistent with the actual situation. © 2017, Editorial Office of Ship Building of China. All right reserved.