融合有限元分析的深厚软土基坑加固模式应用研究

Research on the Application of Reinforcement Mode for Deep Soft Soil Foundation Pit by Integrating Finite Element Analysis

针对深厚软土基坑加固效果与安全性难以评估的问题,以实际项目为例,论文采用有限元分析法模拟分析经真空预压法处理后的软土地基的地表沉降和水平位移。结果显示,真空预压法在预压20 d时的地表水平位移为80 mm,明显低于其他方法。由此说明,真空预压法进行软基加固能显著提高基坑稳定性。

In view of the difficulty in evaluating the reinforcement effect and safety of deep soft soil foundation pit, this paper uses finite element analysis method to simulate the surface settlement and horizontal displacement of soft soil foundation treated by vacuum preloading method. The results show that the horizontal surface displacement of vacuum preloading method is 80 mm after 20 days of preloading, which is significantly lower than that of other methods. It shows that the stability of foundation pit can be significantly improved by vacuum preloading method.