Numerical study of rheologic and soil damage for ground improvement by vacuum preloading

来源期刊：中南大学学报(英文版)2008年第z2期

论文作者：吴跃东 郑世华

文章页码：161 - 167

Key words：vacuum preloading； plane stain； FEM； rheology； damage； consolidate

Abstract: Based on the characteristics and reinforcement mechanism of vacuum preloading applied in high way soft foundation, the theoretical calculation method of vacuum preloading was presented. According to the equivalent method derived from sand drain foundation subjected to plane and axisymmetric conditions, the three dimensional problem was transformed into plane strain problem. The modified Komala-Huang model was used to model the rheological behavior and the damage theory was also introduced to consider the effect of damage caused by construction disturbance. Numerical simulations were carried out for a high way test section. The results show that simulations of the viscoelastic-plastic-damage model are in good agreement with the field measurements. It suggests that the calculation method, simplified load and boundary condition used in this study are reasonable.