濁水巷地滑地穩定性之探討

Stability Analyses on the Landslide of Tso-Sui-Hsiang

萬昆明(Kuan-Ming Wan) ； 林親義(Chin-I Lin) ； 游繁結(Fan-Chieh Yu)

《中華水土保持學報》 27卷1期 (1996/03) Pp. 47-52

https://doi.org/10.29417/JCSWC.199603_27(1).0005

摘要

本文以臺中市大坑濁水巷地滑地為試區，進行邊坡穩定性之分析。首先實施地層鑽探，以瞭解地質構造，並對其鑽探之岩心樣本，實施土壤力學性質試驗，分析土壤在天然含水量及飽和合水量之抗剪強度變化，以為實施穩定分析之依據。本地滑地經分析結果屬平面型地滑，在原測定之地下水位高度下，利用一般切片分析法，其兩條測線之安全係數分別為1.14及1.11；在豪雨過後，地下水位上升至土層表面時，土壤在完全飽和的情況下，安全係數分別降至0.90及0.91。故為防止本地滑地之惡化，實有整治之必要。

關鍵字

地滑 ； 抗剪強度 ； 內摩擦角 ； 凝聚力 ； 切片分析法

並列摘要

This paper designated Tso-Sui-Hsiang as a landslide experimental site at Ta-Kun. Taichung to analyze its slope stability. In order to understand its geological profile, geological boring was conducted and soil was sampled to analyze mechanical properties. The shear strength of soil was analyzed with the changing of water content to realize the stability of landslide. The landslide was concluded s a plane type of landslide. The safety factors were 1.14 and 1.11 according to the slice method with original underground water table. The safety factors reduced to 0.90 and 0.91 when the underground water table rose to the ground surface and soil water content was saturated. For the prevention of the slope failure, the managing agency should practice certain treatments on this site.

並列關鍵字

Landslide ； Shear Strength ； Angle of Internal Friction ； Cohension ； Method of Slice.