抄録
The material properties of cement-admixed soil vary spatially. Statistical parameters such as mean, coefficient of variation and scale of fluctuation were used to characterize the spatial variability of cement-admixed soil. In this paper, an advanced constitutive model for cement-admixed marine clay is firstly randomized by relating model parameters to mix ratios and hence binder concentration. This makes it possible to estimate behavior of spatially varying cement-admixed soil before construction. Then a random finite element analysis with fully-coupled consolidation analysis is performed to simulate the undrained behavior of cement-admixed soil with spatially varying properties in specimen-scale. Results show that existence of spatial variability reduces the overall strength of specimen and a “worst case” occurs when SOF is approximately one third of the diameter of specimen.
