A Preliminary Report on the Chiufenershan Landslide Triggered by the 921 Chichi Earthquake in Nantou, Central Taiwan
A Preliminary Report on the Chiufenershan Landslide Triggered by the 921 Chichi Earthquake in Nantou, Central Taiwan
复制标题
中部南投921七七地震引发九分二山滑坡初步报告
DOI：
--
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Mingte Hsu
中科院分区：
文献类型：
--
作者：
Chien;Mien;Mingte Hsu
1999年9月21日，921集集地震引发了一场大规模的斜坡滑坡--九峰山滑坡。在占地约200公顷的斜坡上，3000多万立方米的岩石被移动，堵塞了溪流形成了两个堰塞湖，造成20多人死亡。坡面地形倾角、坡底失稳断裂带和岩体中发育的不连续面构成了滑坡的基本内在因素。造成滑坡的关键因素是地震产生的强烈地面运动。这次事件完全出乎意料，因为在斜坡坍塌之前，斜坡上没有日光的痕迹。在详细的地质调查和收集各种现场特征的基础上，对滑坡的分类和成因进行了描述和讨论。
A large-scale dip-slope landslide, the Chiufenershan landslide, was triggered by the 921 Chi-Chi Earthquake on September 21, 1999. At the site, which covers some 200 hectares of incline, over thirty million cubic meters of rock masses were displaced, blocking streams to form two dammed lakes and causing more than 20 fatalities. Dip-slope topography, incompetent fault zone on slope base together with well-developed discontinuities in rock masses constitute the fundamental internal factors for sliding. The critical factor contributing to the landslide is the strong ground motion generated by the earthquake. The event is totally unexpected because there was no trace of daylight on the slope prior to slope failure. Based on detailed geological investigations followed by the collection of various on-site features, the classification and factors causing landslide were described and discussed.