遽變式山崩調查與動態模擬之研究

Kinematic Process of the Catastrophic Landslide through Investigation and Numerical Simulation

羅佳明(Chia-Ming Lo) ； 林彥享(Yen-Hsiang Lin) ； 魏倫瑋(Lun-Wei Wei) ； 黃韋凱(Wei-Kai Huang) ； 鄭添耀(Tien-Yao Cheng) ； 林銘郎(Ming-Lang Lin) ； 董家鈞(Jia-Jyun Dong) ； 李錫堤(Chyi-Tyi Lee)

《中國土木水利工程學刊》 24卷3期 (2012/09) Pp. 231-243

https://doi.org/10.6652/JoCICHE.201209_24(3).0002

摘要

This paper presents results of a case study on the Hsiaolin catastrophic landslide, including its kinematic process and the geometry of deposition. Based on geomorphologic analysis, the landslide initiated in thick, multi-aged colluvium soils at the headwaters of a small stream upslope of Hsiolin village. A three dimensional discrete element program, PFC3D was used to model interaction between the landslide and the Hsiaolin village. The landslide converted from debris and rock slide to debris avalanche during the kinematic process. The predicted velocity of initial motion was about 5~10 m/sec from source area. Then the predicted velocity was higher than 30 m/sec on steep terrain, a velocity which permitted the debris to cross Qishanxi stream and destroyed downstream village.

關鍵字

遽變式山崩 ； 分離元素法 ； 地形分析

並列摘要

This paper presents results of a case study on the Hsiaolin catastrophic landslide, including its kinematic process and the geometry of deposition. Based on geomorphologic analysis, the landslide initiated in thick, multi-aged colluvium soils at the headwaters of a small stream upslope of Hsiolin village. A three dimensional discrete element program, PFC3D was used to model interaction between the landslide and the Hsiaolin village. The landslide converted from debris and rock slide to debris avalanche during the kinematic process. The predicted velocity of initial motion was about 5~10 m/sec from source area. Then the predicted velocity was higher than 30 m/sec on steep terrain, a velocity which permitted the debris to cross Qishanxi stream and destroyed downstream village.

並列關鍵字

catastrophic landslide ； discrete element method ； geomorphologic analysis