在淤泥层较厚的软土地基上修筑道路工程,地基的沉降固结规律是设计和施工的分析重点,地基的大变形沉降、施工期的稳定安全系数等都是应该考虑的问题。本文结合工程实例,利用岩土工程有限元软件PLAXIS模拟路基的分层填筑施工过程,通过计算对比得出土工格栅与塑料排水板联合加固软土地基可以得到较好的效果,重点研究有无塑料排水板、是否设置土工格栅对沉降及稳定性的影响。 The construction of road works on the thick soft soil foundation with thick silt layer is the key point of design and construction analysis. The settlement of large deformation of foundation and the stable safety factor during construction are all problems that should be considered. In this paper, with the engineering example, the geotechnical finite element software PLAXIS is used to simulate the filling process of subgrade filling. Through calculation and comparison, it can be concluded that geogrid and plastic drainage plate can be combined to reinforce soft soil foundation. No plastic drainage board, whether to set the geogrid on settlement and stability.