Reliability analysis of a hydraulic fill with respect to liquefaction and breaching

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A recently reclaimed site in the Port of Rotterdam will serve as location and foundation of an LNG terminal. LNG (Liquefied Natural Gas) is recognized as hazardous material and underlies strict safety requirements. As part of the safety assessment of the entire installation, a specific analysis had to be carried out concerning the geotechnical aspects. The paper describes the probabilistic approach that was chosen to verify the required level of safety of the hydraulic sand fill regarding (static) liquefaction, slope failure and breaching processes. Several reliability analyses using the respective physical process models were carried out and the results combined using a fault tree or scenario approach, leading to upper bounds of the failure probability.