饱和南京细砂孔压增量模型的普适性研究

循环荷载作用下饱和砂土的孔压增长规律是土动力学的核心内容之一。基于笔者在给定相对密度、均等固结条件下饱和南京细砂的不排水等幅循环三轴试验结果建立的孔压增量模型,进一步进行了不同相对密度、不同固结比条件下饱和南京细砂的不排水等幅循环三轴试验,将上述均等固结的孔压增量模型拓展为适用于不同相对密度、均等和非均等固结条件的孔压增量模型。采用拓展后的孔压增量模型对试验结果进行分析的结果表明：通过该孔压增量模型预测验证试验的孔压与验证试验测试的孔压具有较好的一致性,说明该孔压增量模型具有普适性。

Research on Universality of Pore Water Pressure Increment Model for Saturated Nanjing Fine Sand

The pore water pressure（PWP） increase in saturated sand under cyclic loading is one of the key part of the soil dynamics.Based on the PWP increment model developed on the basis of the undrained constant-amplitude cyclic triaxial tests on saturated Nanjing fine sand with given relative density under isotropic consolidation,further undrained constant-amplitude cyclic triaxial tests were carried out on saturated Nanjing fine sand with different relative densities under isotropic or anisotropic consolidation.The PWP increment model suited for given relative density and isotropic consolidation is extended to different relative densities and anisotropic consolidation.The results show that the pore water pressure predicted from the PWP increment model is consistent with that from test measurements better and the model has its universality.