Remediation of Liquefaction Effects for an Embankment using Soil-cement Walls

This data report describes the model construction procedure and presents results for a centrifuge test of an embankment on a liquefiable foundation layer treated with soil-cement walls and subjected to seismic loads. The centrifuge experiment was carried out on the 9-m radius centrifuge at the Center for Geotechnical Modeling at UC Davis. The model corresponded to, in prototype units, a 28-m tall embankment of coarse medium dense Monterey sand (relative density, Dr ~= 85%) underlain by a 9-m thick saturated loose Ottawa sand layer with Dr of about 42%. Soil-cement walls were constructed through the loose sand layer over a 30-m long section near the toe of the embankment and covered with a 7.5-m tall berm. The soil-cement had an average unconfined compressive strength of 2.0 MPa and the walls had an area replacement ratio of 24% over the width of the embankment. The model was shaken with a series of scaled earthquakes having peak horizontal base accelerations ranging from 0.05g to 0.54 g. This data report describes the model construction procedure (e.g. sand pluviation, soil-cement wall construction, instrumentation), and presents results for the soil, embankment, and soil-cement walls.