深基坑土钉支护结构的三维有限元分析

运用ADINA非线性有限元软件对广州某深基坑土钉支护结构进行了模拟分析．建立了带有接触界面的局部三维和整体三维有限元模型，模拟了基坑开挖与支护的施工过程，分别得出了土钉的轴力，支护面层的水平位移及土压力的分布规律，并将它们与现场实测值进行了对比分析．结果表明，计算值与实测值基本吻合，整体三维模拟结果更接近实测值，说明建立的非线性有限元计算模型和分析方法是可靠的，同时分析结果也验证了ADINA软件在土工分析方面的优势．

3-D FEM Analysis of Soil Nailed Wall for Deep Foundation Excavation

Based on the nonlinear finite element software ADINA, the construction process of excavation and supporting of the soil nailed wall for deep foundation excavation in Guangzhou is simulated by establishing local and whole three-dimensional finite element models with the contact interface. The axial forces of soil nailings, the horizontal displacement of supporting surface and the distribution law of soil pressure are obtained, which are compared with the actual test data. The comparative results show that the FEM analytical results are basically corresponding with those of the field test data, especially in whole three-dimension- al results. The very good agreement shows that the FEM models and the analytical method are reliable. Furthermore,the results of analysis prove that the software ANDIA is better than others in geotechnical engineering.