Centrifuge Model Tests and Finite Element Analyses on Seismic Behavior of Quay Walls Backfilled with Cement-Treated Granular Soils

Abstract

Dynamic centrifuge model tests and finite element analyses (FEA) were conducted to investigate the seismic behavior of quay walls backfilled with cement-treated granular soils (CTGS). In particular, the effects of the CTGS fill depth and fill range on seismic behavior were investigated. The centrifuge model tests showed that no liquefaction was generated in the CTGS backfills. The quay wall’s horizontal displacement induced by the seismic loading decreased with increases in the CTGS fill depth because the earth pressure acting on the quay wall was reduced. In addition, a wedge-shaped CTGS fill was found to be effective at reducing the horizontal displacement of the quay wall. However, the results of the dynamic FEA indicate that the wedge angle of the CTGS fill should be carefully designed.