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| 題 名 | 山黃麻根系對其土/根系統抗剪強度增量之影響評估=Evaluation of the Shear Strength Increment of Trema orientalis Soil/Root System due to Roots |
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| 作 者 | 林信輝; 許涵硯; 劉文宗; 林德貴; | 書刊名 | 中華水土保持學報 |
| 卷 期 | 43:1 2012.03[民101.03] |
| 頁 次 | 頁41-54 |
| 分類號 | 442.3 |
| 關鍵詞 | 土/根系統; 極限拉拔抗力; 根系抗剪強度增量; Soil/root system; Ultimate pull-out resistance; Shear strength increment due to roots; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 本研究採用數值方法來建立土/根系統極限拉拔抗力與其抗剪強度增量之轉換機制,以便在未來能運用於含根邊坡之穩定分析上。首先,針對台灣坡地先驅優勢植物山黃麻進行根系調查、單根抗拉強度試驗及現地根系之拉拔抗力試驗。依據調查之根系形態以及根系材料強度,吾人可建構二維之土/根系統數值模型,並用來模擬土/根系統之極限拉拔抗力P(下標 u),以及直接剪力試驗中由於根系所提供之額外抗剪強度增量△S(下標 r)。最後,並提出△S(下標 r)=f (P(下標 u之)) 之關係轉換函數。 |
| 英文摘要 | A mechanical conversion model was developed using a numerical method to correlate the shear strength increment due to root, ΔS(subscript r), with ultimate pull-out resistance, P(subscript u), of the soil/root system. The conversion model can be applied to determine the required shear strength parameters for stability analyses of vegetated slopes. Trema orientalis (L.) Blume (India charcoal trema), a pioneer and dominant tree on the low slopeland of Taiwan, was selected as the target species of the study for the field investigation of root morphology, in-situ pull-out tests, and laboratory tensile strength tests. Using the root morphology and the strength parameters of the root material, one can develop a 2-D numerical model of the soil/root system to simulate ultimate pull-out resistance, P(subscript u), from the pull-out test and the shear strength increment due to roots, ΔSr, of the soil/root system from direct shear tests. Eventually, a relationship function, ΔS(subscript r)=f (P(subscript u)) can be proposed for practical use. |
本系統中英文摘要資訊取自各篇刊載內容。