頁籤選單縮合
題 名 | 臺灣中部南投丘陵地區地滑之特性=Characteristics of Landslides in the Hilly Region of Nantou, Central Taiwan |
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作 者 | 王文能; 吳仁明; 張義雄; 謝金德; | 書刊名 | 水土保持學報 |
卷 期 | 31:3 1999.09[民88.09] |
頁 次 | 頁167-175 |
分類號 | 434.273 |
關鍵詞 | 地滑; 順向坡; 擠壓式滑動; 牽引式滑動; Landslide; Dip-slope; Progressive movement; Regressive movement; |
語 文 | 中文(Chinese) |
中文摘要 | 南投丘陵係由膠結鬆散的砂岩夾頁岩所構成,並呈明顯的單面山或豚背嶺地形,其順向坡為地滑頻發之處。雙坑與過溪城兩地滑為南投丘陵兩標準的順向坡地滑,地表地質、鑽探、孔內傾斜管、地下水等調查結果,顯示該等地滑均發生於頭嵙山層香山相的地層內,地層呈南北走向,向東傾斜10°∼20°;每一地滑均由數個滑動體所構成,滑動層為黃褐色表土與風化砂岩塊,透水性佳,厚度3∼14m,其下為透水性較差之灰色新鮮岩盤;降雨致使地下水壓上昇,是地滑的主要誘因;由於雙坑地滑為擠壓式滑動,而過溪城地滑則為牽引式滑動,因此在治理對策上,前者應先處理上邊坡,後者則先穩定下邊坡滑動。 |
英文摘要 | The geological formation of hilly land in Nantou is mainly composed of loosely-cemented sandstone alternated with shale. The cuesta landscape is well-developed. Landslides usually occur on dipslopes. Typical examples of landslides on dipslopes can be found in the vicinity of Shuang-Keng and Guoh-Shi-Cherng villages. The results indicate all landslides occurred in the stratum of Toukoshan Formation. The outcrops strike N-S and dip 10°∼20° to the east. Each landslide consists of several sliding blocks. The sliding blocks comprise yellowish brown soils and weathered sandstone, and are considered rather permeable. The blocks, underlain by fresh grayish sandstone, ranged 3∼14m in thickness. Increase of pore-water pressure induced by rainfall is identified as the triggering factor of landslides. As the Shuang-Keng landslide shows characteristics of progressive movement, remedial measures are recommended to remove the weight of the crown area. The Guoh-Shi-Cherng landslide exhibits a regressive behavior, priority should be given to the stabilization of the toe area. |
本系統中英文摘要資訊取自各篇刊載內容。