| Summary: | 碩士 === 國立成功大學 === 土木工程學系碩博士班 === 90 === ABSTRACT
An elasto-plastic, Undrained, seepage, three-dimensional (3-D) Finite Difference Method (FDM) is adopted to investigate the effects of micropile protection on lateral wall movement and ground settlement around multi-strutted deep excavations in Taipei. The technique as well as the numerical procedures for modeling the excavation processes was proposed using FDM program, FLAC3D, to assess the significance of micropile protection in typical-sized excavation. In the study, a 3-D finite difference analysis incorporated with groundwater seepage flow analysis of a full-scale bottom-up deep excavation in TIFC (Taipei International Financial Center) project was initially conducted to verify the numerical procedures and a series of parametric studies of micropile protection with various inclination, spacing and length are discussed on reducing of the maximum lateral wall movement and ground surface settlement for a standard deep excavation in Taipei subsoil. Importantly, the soil parameters used in the analysis is determined by direct back-analysis procedure of TIFC field instrumentation data which was considered as one of the well-organized instrumentation project in Taipei Metropolitan.
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