Centrifuge Model Tests on Settlement Regularity of Loess Ground

This paper focuses on the settlement of loess high-fill ground. The settlement characteristics of the loess filled ground in the gully were studied by centrifuge model tests. The results indicate that those factors, i.e. the boundary condition, fill height, valley shape, compaction degree, and humidification, have significant effect on the settlement of filled ground. Settlement occurs mainly in the construction stage, and the post-construction settlement linearly increases with increasing filled height. The narrow valley tectonic has obvious deformation confinement effect on the filled soil. The full compaction of filled loess during the construction phase can reduce the post-construction settlement, and the improvement of compaction degree will be more obvious for the settlement control of large thickness filled ground. Due to the water-sensitive characteristics of loess, a significant settlement caused by wetting exists as long as the filling material being humidified, even though the post-construction settlement tends to be stable.