土钉支护变形性能的有限元分析

通过建立三维有限元模型，对土钉支护的变形性能进行分析。在分析中，考虑土的非线性应力－应变关系、土钉与土体的相互作用，以及分步施工过程。通过计算给出一个工程实例的水平位移计算结果，对不同开挖阶段的计算值与实测值进行比较，计算结果与实测结果基本吻合，验证了有限元分析方法的可靠性。所建立的土钉支护有限元分析方法具有工程应用前景。

ANALYSIS OF DEFLECTION BEHAVIOR OF SOIL NAILING BY FEM

In this paper a true three - dimensional finite element model has been developed to model the behavior of soil nailed structures. In this finite model, the nonlinear stress - strain relationship of soil, the soil - nail interaction and the staged construction are all taken into consideration. An analysis of the ground movements of an engineering case is presented. The computed horizontal soil movements for various stages of excavation are compared with the field measurements. The agreement between the measured and the computed results is good, which proves the reliability of the method. Therefore, the FEM for soil nailing will find wide engineering application in the future.