地下水滲流對邊坡崩壞之砂箱試驗

Study on Slope Failure Induced by Seepage Flow

游繁結(Fan-Chieh Yu) ； 蔡志隆(Chih-Lung Tsai) ； 劉邦崇(Pang-Chung Liu)

《中華水土保持學報》 33卷1期 (2002/03) Pp. 47-55

https://doi.org/10.29417/JCSWC.200203_33(1).0006

摘要

本研究係藉由砂箱試驗，以兩種均勻粒徑砂粒堆積成四種不同坡度之邊坡，由不同入滲水頭高度模擬地下滲流對邊坡破壞之影響。其結果如下：1.均勻試料邊坡受滲流作用而破壞多呈圓弧形崩滑面；而坡面流失之體積與坡面滲出之流量呈冪次關係。2.利用因次分析，可求得單位寬土砂流失量（V_S）、滲流線坡度（sinθ_i）、滲流線之滲出點高度（h）、土砂之孔隙率（n）之關係式爲In(V_s/h^2) = 3.90+2.50In(sinθ_i)+1.81 In(n)相關係數R = 0.813

關鍵字

滲流 ； 邊坡破壞 ； 孔隙率 ； 地下水

並列摘要

To analyze the influence of seepage on landslide, we conducted an experiment with two kinds of homogeneous grain size composition and four kinds of slope with different hydraulic heads in a sand-box. The results obtained were as follows. 1. Under homogeneous deposition, the shape of the failure slope destroyed by seepage was almost a circular arc. The relation between the landslide volume and the discharge of seepage flow is exponential. 2. An equation derived for estimating the volume of landslide triggered by seepage was as follows: In(V_s/h^2) = 3.90+2.50 In(sinθ_i)+181 In(n)

並列關鍵字

seepage ； lateral landslide ； porosity ； groundwater