This paper presents an upgraded nonlinear creep consolidation model for VDI soft ground, incorporating a modified UH relation to capture soil creep deformation. Key novelties also include considering linear construction loads, TDP boundary conditions, and Swartzendruber's flow in the small strain consolidation domain. The system was solved using the implicit finite difference method, and numerical solutions were rigorously validated. A parametric analysis reveals that soil viscosity causes abnormal EPP increases under poor drainage conditions during early consolidation. Meanwhile, neglecting the time effect of the secondary consolidation coefficient delayed the overall EPP dissipation process and overestimated the settlement during the middle and late consolidation stages. Furthermore, TDP boundaries, Swartzendruber's flow, and construction processes significantly influence the creep consolidation process but not the final settlement. These findings offer fresh insights into the nonlinear creep consolidation of VDI soft ground, advancing the field.

中文翻译：

---

线性施工荷载作用下具有时变渗透边界的垂直排水改良软土地基的非线性蠕变固结


本文提出了一种升级的 VDI 软土地基非线性蠕变固结模型，该模型结合了改进的 UH 关系来捕获土壤蠕变变形。关键的新颖性还包括考虑线性构造载荷、TDP 边界条件和小应变固结域中的 Swartzendruber 流。该系统使用隐式有限差分法求解，并对数值解进行了严格验证。参数分析表明，在早期固结期间，土壤黏度会导致排水不良条件下 EPP 异常增加。同时，忽视次生固结系数的时间效应延缓了整体 EPP 耗散过程，高估了中后期固结阶段的沉降。此外，TDP 边界、Swartzendruber 流和施工过程对蠕变固结过程有显著影响，但对最终沉降没有影响。这些发现为 VDI 软土地基的非线性蠕变固结提供了新的见解，推动了该领域的发展。