頁籤選單縮合
題名 | 石門集水區優勢植物土-根系統之三維力學轉換模式=3-D Mechanical Conversion Model for the Soil-Root System of the Predominant Plant in the Shi-Men Watershed |
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作者 | 林德貴; 邱倍堅; 王勝賢; 林信輝; | 書刊名 | 中華水土保持學報 |
卷期 | 44:2 2013.06[民102.06] |
頁次 | 頁105-120 |
分類號 | 434.273 |
關鍵詞 | 土-根系統; 三維數值模型; 根系之抗剪強度增量; 極限拉拔抗力; Soil-root system; 3-D numerical model; Increment of shear strength due to roots; Ultimate pull-out resistance; |
語文 | 中文(Chinese) |
中文摘要 | 本研究針對台灣坡地植生工程常用植物山黃麻,進行根系形態調查及根系材料試驗,並建構及驗證土-根系統之三維數值模型、數值模擬程序及各項材料參數輸入值之有效性。再利用上述三維數值模型,來進行土-根系統直接剪力試驗之數值模擬,以決定根系在土-根系統中提供之抗剪強度增量ΔSr。最後,可建立ΔSr與地上部植生基徑D,以及地下部根系極限拉拔抗力模擬值Pus等參數間之轉換模式:ΔSr=f(D)以及ΔSr=f(Pus),並採用ΔSr來評估根系對邊坡穩定性之貢獻度。 |
英文摘要 | Firstly, a series of field surveys of root morphology and mechanical tests of root material were carried out on Trema orientalis (L.) Blume (India charcoal trema), a plant species commonly used for slope land vegetation in Taiwan. Subsequently, a three-dimensional (3-D) numerical model of the soil-root system was established to simulate an in-situ pull-out test of the soil-root system. The validities of the 3-D numerical model, simulation procedures and various input material parameters in the model were also verified. Subsequently, a 3-D numerical model identical to the soil-root system used in pull-out test was repeatedly adopted for the simulation of a direct shear test to estimate the shear strength increment of the soil-root system due to root ΔSr. Eventually, a mechanical conversion model was developed to correlate the ΔSr with the basal diameter of plant D and the simulation of ultimate pull-out resistance of root Pus, namely, the relationship function ΔSr=f(D) and ΔSr=f(Pus). In addition, the proposed model can be used to determine the required strength parameters for the stability analysis of vegetated slopes and quantitatively evaluate the contribution of a root system to the stability of a slope. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。