- 期刊
Three Dimensional Analyses of Deep Excavation in Taipei 101 Construction Project
並列摘要
Based on the actual construction sequences, a three-dimensional (3-D) deformation analysis incorporated with steady state groundwater seepage calculation was performed to simulate the ground movement of deep excavation in Taipei 101 (or Taipei International Financial Corporation, TIFC) construction project. In 3-D analysis, an optimized geometry model and mesh density was adopted according to the convergence study to achieve a computation with high efficiency and accuracy. This paper evaluates the lateral wall movement of diaphragm wall considering the restraint effect of wall corner which frequently influenced by the stiffness of strutting system. A value of PSR (Plane Strain Ratio) defined by the ratio of the maximum lateral wall movements from 3-D and 2-D (two-dimensional) analyses in sequential excavation stage is used to quantify the potential of restraint effects. According to the PSR values at Tower zone and Podium zone, the numerical results reveal that the lateral wall movement of all sections being evaluated along diaphragm wall can be restrained by the wall corner during the excavation even though a heavily supporting system was installed. Conclusively, the restraint effect of wall corners is hardly suppressed by the preloaded steel strutting system of bottom-up method at Tower zone and the concrete floor slab strutting system of top-down method at Podium zone and it is exceedingly crucial using 3-D computation model to reflect the realistic deformation behavior of multi-strutted deep excavation in Taipei 101 construction project.
延伸閱讀
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