A Landslide in Wu-Fong-Chi Area of Yilan County, Taiwan

作者：Chih Yuan Lin; Hong Shen Chen; Tung Chin Kung Gordon^*

来源：Disaster Advances, 2012, 5(4): 614-621.

• Landslide
• Szeleng Sandstone Formation
• Rainfall
• Mining

In later 2000, a landslide occurred beside the primary access to the Wu-fong-chi scenic area in Yilan County of Taiwan. The landslide occurred posterior to the torrential rainfall produced by two typhoons (Xangsane, No. 200020 during Oct. 30th to Nov. 1st and Bebinca, No. 200021 during Nov. 6th to Nov. 7th), which struck Yilan County in 2000. The precipitation of approximate 700 mm was produced in one week during the periods of two typhoons in the Wu-fong-chi area, Yilan County. The estimated area of the landslide is approximately equal to 2 ha. This study aims at investigating the landslide disaster, including the topography and geological structure in the Wu-fong-chi area and monitoring of the deformation of this landslide, for evaluating its failure mechanism. Several in-situ instruments, including inclinometers, surface extensometer, ombrometer and shallow-layer in-place inclinometers, were installed in this case history to monitor the deformation characteristics of this landslide. Based on the results of measurements, it could be concluded that the excavation of slope toe as well as the heavy rainfall are two main factors causing the landslide disaster. Lessons could be learnt from this case history.

• 出版日期2012-10