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利用有限元素法分析土戧擋土開挖與問題探討

Use of Finite Element Analysis in Bermed Excavation and Its Associated Problems

摘要


本研究以二個土戧擋土開挖工程為例,探討有限元素法預測土戧擋土開挖的結果及問題。研究結果顯示:有限元素法可合理的預測土戧開挖之短期土壤位移行為,但由於未能考量土戧漸進破壞的影響以及用以地盤改良之攪拌樁和粘土間互制行為,因此無法模擬開挖後擋土壁持續產生之側向位移,致使預測所得之壁體側向位移和現地最後觀測結果比較起來會有低估的現象。

並列摘要


The finite element method is used in this study to investigate behavior of two bermed excavations. The results show that the finite element method can reasonably predict the short-term behavior of ground movement induced by bermed excavation. But the longer-term lateral deflection of retaining wall after excavation can not be reasonably simulated without considering the progressive failure behavior of berm and the interaction behavior between grout piles and clay.

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