新中橫快速道路板岩邊坡破壞與防制之介紹

An Introduction to Slope Failure Mode and Prevention in Slate Area of Central Cross-Island Expressway

李彪(Piao Lee) ； 劉志學(Chih-Shae Liu)

《地工技術》 99期 (2004/03) Pp. 83-92

https://doi.org/10.30140/SG.200403.0008

摘要

中橫快速道路埔里花蓮段之前段位於板岩區內，有較多之邊坡穩定問題必須加以評估，而邊坡穩定性評估因素，主要包括岩性、岩質、侵蝕作用、斷裂構造及地形等。分析評估建議需包含材料破壞及構造破壞兩種模式。由於地質條件的多變性、不確定性，設計者往往不易掌握適當之地質參數與條件，因此應於規劃階段設計一套完整之作業計畫，有系統的獲取各項評估參數，以及建立適當之邊坡地質模式，以供邊坡穩定分析評估以及設計之用。邊坡破壞的防制在各環節上是緊緊相扣的，而最佳化的第一步仍在於釐清地質條件及可能之破壞模式，如此才能提供適當的參數與地質模型予設計者，進而完成適當的防制措施。

關鍵字

中橫快速道路 ； 板岩 ； 邊坡穩定

並列摘要

In the Central Cross-Island Expressway between Pule-Hua-lian section, the front part is located on the slate area. So there are many slope stability issues, that need to be evaluated before construction. For stability evaluation, Key factors are lithology, rock mass specialty, erosion, crack structure, topography, and etc. We suggest the stability analysis should include the mechanism of material and structural failure. Due to variable and uncertain geological conditions, the designers are often troubled with selecting appropriate geological parameters. For this reason, we should integrate whole operation plan in planning phase. Then we can obtain each design parameter systematically, and build a suitable model of the border-sloping field. The results can be used to evaluate and design the stability of the border-sloping field. To prevent the slope failure, every steps are tightly linked to influence each other. The first step of optimization is to understand the geologinal condition and the probable failure mechanism. So we can provide suitable parameters and geological model to the designer, and help them accomplish appropriate precautionary measures.

並列關鍵字

central cross-island expressway ； slate ； slope stability