2024 Volume 10 Issue 15 Pages 473-478
Cellular quay wall structures, which are relatively economical deep-water harbour structures, have been used in marine harbours. In deep-water cellular quay walls, backfilled stones have been used behind the cells to improve the stability and seismic resistance of cells, which are steel cylinders filled with soil, by reducing the earth pressure behind the cells. However, it is believed that by solidifying the ground behind the cells, earth pressure is reduced, and the cells become more seismically resistant than if rubble stones have been installed. In this study, shaking model tests were conducted using a centrifuge to investigate the seismic behaviour of a cellular quay wall with a solidification method behind it. In the tests, a cell was modelled as a rectangular shape to observe the ground deformation inside the cell and the natural period of the cell was made close to that of the cylindrical body. The shaking model tests showed that the cement-treated soil cracked locally; however, the displacement of the quay wall in front of it was reduced compared to that of the unimproved quay wall, confirming the effectiveness of the solidification method. It was also found that the block- and grid-type improvements resulted in similar levels of quay wall displacement, indicating the possibility of reducing the improvement ratio of the solidification method.
