Plaxis在软土地基海堤变形研究中的应用

Plaxis Deformation in Soft Ground Seawall Study

摘要: 在深厚软土地基上进行海堤固结排水填筑设计时，堤身的沉降与稳定、施工期间及长期的稳定安全系数和工后沉降等因素都是设计必须考虑的问题。本文结合Plaxis程序的特点以及其在计算海堤沉降方面的应用，通过工程现场采集的数据与计算结果对比，认为只要选择合理土体模型、加载步长、符合土体的边界条件以及初始条件，Plaxis程序能够很好地模拟土体在荷载作用下的受力变形过程，计算结果能够满足工程精度要求。可以用Plaxis程序来预测海堤软土地基的变形。

Abstract: In the seawall filling design of concretion and drainage in the deep soft soil, some elements which are often regarded as important have to be considered such as settlement and stabilization of the levee, the stability safety factor during a construction period, the long-term stability safety factor, the settlement after construction and so on. It was combined the characteristics of the Plaxis program and its applications to the calculation of seawall settlement and contrasted actual data collected through the project site with calculation results in this paper. The deformation process of the soil under load is simulated very well via the Plaxis program and the calculation results can meet the project accuracy requirements as long as the soil model, the load step, boundary conditions and initial conditions are reasonable. It’s available to predict the soft soil deformation via the Plaxis program.