坡地破壞潛能模式之建立與探討

Development and Examination of Hillslope Failure Potential Model

蔡東霖(Tung-Lin Tsai) ； 邱彬晟(Bin-Sheng Chiu) ； 楊錦釧(Jin-Chuang Yang)

《中華水土保持學報》 35卷3期 (2004/09) Pp. 211-228

https://doi.org/10.29417/JCSWC.200409_35(3).0003

摘要

本研究根據多孔彈性介質理論以及摩爾－庫倫破壞準則，並利用網格生成法及有限差分法建立坡地破壞潛能模式。模式建立後，首先藉由具有解析解之簡單案例，驗證模式之正確性。模式驗證後，模擬天然坡地之破壞潛能，並探討波松比、孔隙率以及坡地坡度對破壞潛能之影響。結果顯示，波松比與坡地坡度對破壞潛能之影響較孔隙率大。此外，研究中，亦探討載重與積水滲流作用，對坡地破壞潛能之影響。結果發現，載重及積水滲流爲影響坡地破壞潛能不可忽略之重要因素。

關鍵字

坡地破壞潛能 ； 摩爾－庫倫破壞準則 ； 多孔彈性介質理論 ； 網格生成法

並列摘要

Based on poroelastic media theory and Mohr-Coulomb failure criteria, a finite difference hillslope failure potential model adopting grid generation has been developed to study the tendency for hillslope failure in an infinitely extensive landscape with periodic topography. In this study, the proposed model is first applied to a hypothetical case and verified by analytic solutions. Then, the influences of Poisson's ratio, porosity, slope, overburden, and water ponding on failure potential have been examined. The results show that the effects of Possion's ratio and slope on failure potential are more significant than that of porosity. In addition, both the overburden and the water ponding greatly influence the failure potential.

並列關鍵字

hillslope failure potential ； Mohr-Coulomb failure Criteria ； poroelastic media theory ； grid-generation