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題 名 | 礫石形成分布及其排列方式相對於邊坡穩定的關係=Gravel Orientation and Their Shapes Distribution Appear to Effect Slope Grade in Northwestern Taiwan |
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作 者 | 蔡秉儒; 陳宏宇; | 書刊名 | 土木水利 |
卷 期 | 24:1 1997.05[民86.05] |
頁 次 | 頁19-38 |
分類號 | 441.1 |
關鍵詞 | 礫石排列; 走向夾角; 礫石形成; Gravel orientation; Intersected angle of strike; Gravel shape; |
語 文 | 中文(Chinese) |
中文摘要 | 本文是以臺灣西北部臺地�擗妞鶪g礫石地質材料為主,藉著現地礫石之排列方式 及形狀組成的特性發現,在碟狀及板狀礫石的含量增加時,其坡度也成相對增加的趨勢。但 球狀及柱狀的碟石含量增加,則坡度將會相對的降低。而當坡體的走向和礫石排列面的走向 夾角為 180 °時,礫石排列和坡體的關係便如同一個逆向坡的形狀。 在坡體穩定性影響方 面, 礫石排列方向因其具有異向性之特性,其排列方向提供了一個類似 Patton (1966) 岩 石節理粗糙角的模式。 另外,坡體中礫石的形狀不同,也會形成類似 Barton (1977) 岩石 節理的粗糙係數,即當扁平形狀的礫石越多,破壞面上的粗糙係數也會越高,而提高了其剪 力強度,間接的也提高了坡體存在的坡度。 |
英文摘要 | This paper described the characteristics of lateritic gravels in north western Taiwan. The results of in-situ investigation demonstrate that the disk and bladed gravels increase their percentage relative to the material composition, the slope grade will increase. On the other hand, when the proportion of equate and roller shapes increase in the composition, the slope grade will decrease. A escarpment slope will be found when the intersected angle of strike on the gravel orientation and slope surface is 180 °. By contrast, when the intersected angle is 0 °, there is a dip slope geometry. In slope stability, the arrangement of gravel have characteristics of anisotropy. This gravel orientation will offer an similar roughness model with Patton's theory (1996). And, the different gravel shape weill form an similar roughness coefficient with Barton's theory (1997). It means that the plate shape increase, the roughness coefficient increase. This result also effect the shear strength and the slope grade. |
本系統中英文摘要資訊取自各篇刊載內容。