Effect of filling interval time on settlement of subgrade in soft foundation of Pengze-Hukou highway

The settlement and deformation in the soft foundation of Pengze-Hukou Highway during construction process are taken as the research object. The monitoring programme on the soft foundation is discussed. The observed data of settlement of subgrade show that the filling interval has some effect on the settlement. Analytic results indicate that longer filling interval time will extend the consolidation process of subgrade, but it can reduce the total settlement and the horizontal displacement of embankment toe.