Plaxis在板桩码头分析中的应用

现行规范中关于板桩码头的受力计算分析方法均有一定的局限性，且都不能模拟桩土之间的相互作用，为此，运用有限元软件Plaxis对板桩结构的受力特性进行非线性有限元分析，并与竖向弹性地基梁法的计算结果进行对比.结果表明:现行板桩规范中关于墙后主动土压力的假定与Plaxis计算结果不一致；土体硬化(HS)模型能更真实地反映土体的非线性特性；HS模型的土体参数中，内摩擦角最敏感，黏聚力和压缩模量次之，参数M最不敏感.

Analysis of the sheet-pile wall based on Plaxis

Traditional calculation methods specified in the current code for the sheet-pile wall are all limited and the interaction between soil and pile can not be taken into account， therefore non-linear FEM analysis for the interal force of the sheet-pile wall based on Plaxis software is carried out herein, of which results are compared with those of the traditional vertical beam on elastic foundation method. The research results show: (1)the assumption for the active earth pressure behind the sheet-pile wall in current Chinese Code differs from the results by Plaxis； (2)hardening soil constitutive model can represent the non-linear properties of soilmass well; (3)among all soilmass parameters for hardening soil model， the internal friction angle is the most sensitive， the cohesion force and modulus of compressibility less and parameter M is the least.