The thesis studies the behavior of single axially loaded pile located close to a 30m deep braced excavation in Marine Clay corresponding to site conditions of the Kallang formation in Singapore. Parametric analyses were carried out, using non linear three-dimensional finite element methods (with Plaxis Foundation 3-D), comparing different pile lengths (17m, 30m and 42m) cross sections (solid concrete sections of 0.4m and 1.Om diameter) and proximity to the excavation (2m-10m). The results focus on the development of horizontal deformations and bending moments due to the excavation process. The computed results for end-bearing piles (42m long) are compared with semi-empirical design methods proposed by Poulos and Chen (1997). In general, this design method substantially underestimates the computed wall deflections and bending moments. This result confirms the importance of site-specific analyses for these types of complex soil-structure interactions.
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机译：本文研究了与新加坡加冷组的工地条件相对应的单桩轴向载荷桩，该桩位于海洋粘土中深30m的支撑开挖中。使用非线性三维有限元方法（使用Plaxis Foundation 3-D）进行参数分析，比较不同桩长（17m，30m和42m）横截面（直径为0.4m和1.0m的实心混凝土截面）并靠近开挖（2m-10m）。结果集中在开挖过程中水平变形和弯矩的发展上。将端承式桩（42m长）的计算结果与Poulos和Chen（1997）提出的半经验设计方法进行了比较。通常，这种设计方法大大低估了计算得出的墙体挠度和弯矩。该结果证实了针对这些类型的复杂土壤-结构相互作用进行现场特定分析的重要性。
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