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題 名 | 土石流發生臨界條件之理論分析=Theoretical Analysis of Debris-Flow Occurrence Criteria |
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作 者 | 詹錢登; 陳晉琪; | 書刊名 | 力學 |
卷 期 | 16:2 2000.12[民89.12] |
頁 次 | 頁119-129 |
分類號 | 441.12 |
關鍵詞 | 壓土石流; 臨界土層含水量; 臨界土層坡度; 臨界降雨量; Debris flow; Critical water content; Critical slope; Critical rainfall; |
語 文 | 中文(Chinese) |
中文摘要 | 本文首先分析降雨量與土層含水量之關係,然後分析作用在土層之驅動力及其阻 抗力隨土層含水量的變化。當作用在土層之驅動力大於土層阻抗力時,土層會發生破壞,此 時倘若土層中有足夠之水量,則會進一步形成土石流。依此原理,本文推導出三種土石流發 生之臨界條件:臨界土層含水量、臨界土層坡度及臨界降雨量,並探討土層坡度、厚度、土 壤摩擦係數、凝聚力、孔隙率、及土層內水位等因子對這些臨界條件的影響,及說明如何利 用這些條件來評估是否會發生土石流。 |
英文摘要 | This paper analyses the relationship of rainfall with the water content in a loose sediment layer, and the variations of resistance force and driving force with the water content in the sediment layer. When the driving force acting on the sediment layer is greater than the resistance force of the sediment layer, the sediment layer will fail, and debris flow will occur if the water content in the sediment layer is sufficient. Based on these concepts, three kinds of critical conditions, such as critical water-content of sediment layer, critical slope of the sediment layer and critical rainfall, for debris flow occurrence are developed. The influencing factors, such as slope of the sediment layer, friction coefficient of soil, cohesion, water level of the sediment layer, etc., on these critical conditions are also presented. |
本系統中英文摘要資訊取自各篇刊載內容。