This paper presents a reliability-based settlement analysis of T-shaped deep cement mixing (TDM) pile-supported embankments over soft soils. The uncertainties of the mechanical properties of the in-situ soil, pile, and embankment, and the effect of the pile shape are considered simultaneously. The analyses are performed using Monte Carlo Simulations in combination with an adaptive Kriging (using adaptive sampling algorithm). Individual and system failure probabilities, in terms of the differential and maximum settlements (serviceability limit state (SLS) requirements), are considered. The reliability results for the embankments supported by TDM piles, with various shapes, are compared and discussed together with the results for conventional deep cement mixing pile-supported embankments with equivalent pile volumes. The influences of the inherent variabilities in the material properties (mean and coefficient of variation values) on the reliability of the piled embankments, are also investigated. This study shows that large TDM piles, particularly those with a shape factor of greater than 3, can enhance the reliability of the embankment in terms of SLS requirements, and even avoid unacceptable reliability levels caused by variability in the material properties.

本文介绍了基于可靠性的 T 形深水泥搅拌 (TDM) 桩支撑路堤在软土上的沉降分析。原位力学性能的不确定性同时考虑土、桩、路堤以及桩形的影响。使用蒙特卡罗模拟和自适应克里金法（使用自适应采样算法）进行分析。考虑到不同和最大沉降（适用性极限状态（SLS）要求）方面的个人和系统故障概率。将不同形状的TDM桩支撑路堤的可靠性结果与等效桩体积的常规深水泥搅拌桩支撑路堤的结果进行了比较和讨论。还研究了材料特性的固有变异性（平均值和变异系数值）对桩式路堤可靠性的影响。这项研究表明，大型 TDM 桩，