Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/89439
標題: Three-Dimensional Numerical Analysis for the Effects of Geological Properties on Groundwater of Slopes
以三維數值模型探討邊坡地質特性對地下水的影響
作者: 陸弘哲
Hung-Che Lu
關鍵字: FEMWATER
滲透異向性
地下水
崩積層
FEMWATER
permeability anisotropy
groundwater
colluvium
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摘要: 地下水壓影響邊坡的穩定,而地下水壓分佈又受地質材料的性質、土壤和崩積風化層的厚度、岩層滲透異向性等的影響。本研究探討地下水滲透的等向性和異向性中的參數變化以及材料厚度,對地下水分佈的影響。考慮等向性的碗狀岩盤以及崩積風化層厚度,是否會影響地下水位與地下水壓分佈;也比較層面或劈理面產生的滲透異向性、改變滲透係數,比較斜交坡、順向坡、逆向坡在相同降雨狀況下,地下水位與地下水壓分佈的不同。選擇廬山滑動邊坡建立水文地質模型,蒐集莫拉克颱風之雨量、地下水位隨時間變化的資料,用FEMWATER模式分析其三維狀況下地下水位因為降雨造成的變動,結果顯示崩積風化層厚度越小,地下水位也會越高;滲透係數越大,斜交坡、順向坡、逆向坡的水位差異也越明顯;逆向坡水位上升最多,其次是斜交坡,而順向坡最少。
Slope stability is affected by groundwater pressure, of which the distribution is associated with the properties of geomaterials, the thickness of the colluvium or weathered layer, permeability anisotropy. This study aims at the effects of permeability isotropy and anisotropy with the change of parameters and the thickness of materials on the distribution of groundwater. With the permeability anisotropy of cleavage and changing the hydraulic conductivity, the groundwater levels of oblique, dip, and anaclinal slopes are compared under the same rainfall amount. Furthermore, comparing the bowl-shaped bed rock and the thickness of the colluvium or weathered layer, whether affecting groundwater levels and the distribution of groundwater pressure. The software FEMWATER was used to establish the hydro-geological model of an unstable slope at Lushan. The thinner the colluvium or weathered layer is, the higher the groundwater rises. And the bigger the hydraulic conductivity is,the more obvious the difference of oblique, dip, and anaclinal slopes is. Besides, under the rainfall of typhoon Morakot, the rises of groundwater from the highest to lowest appear in the anaclinal, oblique, and dip slopes.
URI: http://hdl.handle.net/11455/89439
其他識別: U0005-2708201517021600
文章公開時間: 2018-08-28
Appears in Collections:水土保持學系

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