Abstract Deep cement mixed (DCM) soil columns have been widely utilized to improve soft soil to support embankments or seawalls. However, the influence of the time-dependent behavior of the soft soil on the performance of DCM column-supported embankments is not well understood. In this study, the finite element (FE) model was established to investigate the creep effects on settlements and load transfer mechanisms of the soft soil improved by DCM columns under embankment load. Comparisons were conducted for the cases of the soft soil with or without creep. The parametric analysis demonstrated that the area replacement ratio and Young's modulus of the DCM column can largely influence the long-term behaviors of the DCM column-improved composite ground. The numerical results were also compared with the results calculated by German design method (EBGEO) and British design method (BS 8006). Regarding the vertical stress taken by the DCM column, EBGEO method provides a lower limit while BS 8006 method provides an upper limit.

中文翻译：

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路堤荷载下深水泥混合土柱改良软土蠕变对沉降及荷载传递机制的数值研究

摘要 深水泥混合（DCM）土柱已被广泛用于改善软土以支撑堤防或海堤。然而，软土随时间变化的行为对 DCM 柱式路堤性能的影响尚不清楚。在这项研究中，建立有限元（FE）模型来研究蠕变对路堤荷载作用下DCM柱改善软土的沉降和荷载传递机制的影响。对软土有或没有蠕变的情况进行了比较。参数分析表明，DCM 柱的面积置换率和杨氏模量可以在很大程度上影响 DCM 柱改进复合地基的长期行为。数值结果还与德国设计方法（EBGEO）和英国设计方法（BS 8006）计算的结果进行了比较。对于 DCM 柱所承受的垂直应力，EBGEO 方法提供了下限，而 BS 8006 方法提供了上限。