Centrifuge modeling of liquefiable sand supported by sheet pile wall: LEAP tests at Ehime University

抄録

Liquefaction Experiments and Analysis Projects (LEAP) is an international collaborative project that aims to validate and quantify uncertainties in centrifuge tests and numerical simulations on liquefaction. The LEAP-2020 and LEAP-2022 exercises focused on studying the response of a uniform liquefiable sand layer supported by a sheet pile wall with varying embedment depths. This paper presents the results of five centrifuge tests conducted at Ehime University, which were performed to verify the reproducibility of the experiments and assess the effects of relative density of the soil and embedment depth of the sheet pile. The paper provides detailed information on the model preparation process, including the arrangement of sensors, sand placement, and saturation procedures. It presents profiles of penetration resistance obtained from cone penetration tests and compares them with results from previous LEAP exercise. The paper describes typical experimental results, including acceleration response, excess pore pressure response, and sheet pile wall response. The paper also discusses soil deformation, visualized using the PIV technique from a side view of the model.