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针对可回收的夹心桩支护结构 ,基于T L坐标建立了初始构形的大变形增量有限元方程 .引入自修正迭代算法 ,用编制的FLSAC大变形程序 ,对夹心桩支护结构的受力和变形特征进行了分析 .为支护结构设计和选取支护结构参数提供了依据 .
For the retrievable sandwich pile supporting structure, the finite element equation of large deformation increment of the initial configuration is established based on the TL coordinates. The self-correcting iterative algorithm is introduced, and the FLSAC large deformation program is adopted to force the sandwich pile supporting structure. Analysis of the deformation characteristics and the support structure design and selection of support structure parameters provide the basis.