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題 名 | 場鑄基樁負摩擦力特性之分析與評估=On Analysis and Assessment of Negative Skin Friction of Cast-in-Place Bored Piles |
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作 者 | 陳斗生; 楊恆偉; | 書刊名 | 地工技術 |
卷 期 | 112 2007.06[民96.06] |
頁 次 | 頁5-14 |
分類號 | 441.17 |
關鍵詞 | 負摩擦力; 超載; 質流; 大規模回填; 樁載重試驗; t-z曲線; Negative side skin friction; Creep and relaxation; Surcharge; Test fill; Pile load test; T-z curves; |
語 文 | 中文(Chinese) |
中文摘要 | 在基礎工程實務中,由於土層之擾動,回填等超載,或地下水超抽皆可能使樁基礎受到額外之負摩擦力而產生負面效應。但負摩擦力之量化及其變化之預估尚未有一致而相對簡易之評估方法。本文提出之負摩擦力評估法及評估步驟係根據其產生機制,以質流理論說明其變化,並援引大規模回填案例實測之負摩擦力變化數據;然後採用樁載重試驗結果及所獲之t-z曲線,以電腦模擬分析模式,估算基樁受到進一步載荷下產生位移時負摩擦力之消長及預估基樁在各載荷下之荷重傳遞分佈曲線;並由此分析結果檢討評估基樁在各受力階段之安全性。 |
英文摘要 | In this article, a method and procedure is proposed based on the observed significant negative side skin friction occurred to pile foundations, employed the concept of creep and relaxation and through a series of study which consisted of monitoring of settlements of various soil stratum and the induced pore water pressure during pile installation, instrumented full scale pile load test, and artificial surcharge test fill. By using the data collected, an analytical model using t-z curves may be used to evaluate the variation of negative skin friction and the future behavior of the pile foundations under additional loads. |
本系統中英文摘要資訊取自各篇刊載內容。