The Takanodai Landslide, Kumamoto, Japan: Insights from Post-Earthquake field Observations, Laboratory Tests & Numerical Analyses (2018)
Authors
Abstract
The 2016 Kumamoto Earthquakes, Japan, caused a number of geo-disasters in the Aso Volcanic Caldera, including a large-scale flow-type slope failure known as the Takanodai landslide. Between April and October 2016, the Authors conducted a series of post-earthquake geotechnical damage surveys and field investigations in the affected areas, and retrieved samples of volcanic soils to be characterized in the laboratory. In this poster, first, the Takanodai landslide is described. Then, results of monotonic and cyclic undrained torsional simple shear tests carried out on reconstituted specimens of Aso pumice are shown. Moreover, to provide insights into the failure mechanism of the Takanodai landslide, results of dynamic soil response and seismic slope stability analyses are presented. The numerical investigation confirmed that the pumice soil deposit was responsible for the landslide triggering. Besides, the combination of pore pressure build-up and large inertial forces were the key factors for the flow-type Takanodai slope failure.
Rights
CC-BY 4.0 InternationalRelated items
Showing items related by title, author, creator and subject.
-
Deformation and cyclic strength characteristics of loose and medium-dense clean sand under sloping ground conditions: insights from cyclic undrained torsional shear tests with static shear
Umar M; Kiyota T; Koseki J; Chiaro, Gabriele (2021)The effects of liquefaction on sloping ground often include the development of extremely large deformation. Although such phenomenon has been repeatedly observed following major earthquakes, the triggering conditions are ... -
Numerical analyses of the earthquake-induced Takanodai landslide, Kumamoto, Japan
Chiaro G; Chew KSY; Kim J-S (2018)The 2016 Kumamoto Earthquakes, Japan, caused a number of geo-disasters in the Aso Volcanic Caldera, including a large-scale flow-type slope failure known as the Takanodai landslide. Between April and October 2016, the ... -
Deformation and cyclic resistance of sand in large-strain undrained torsional shear tests with initial static shear stress
Umar M; Kiyota T; Ullah N; Chiaro, Gabriele (Elsevier BV, 2021)This paper presents the findings from an experimental study focusing on the undrained cyclic behavior of sand in the presence of initial static shear stress. A series of undrained cyclic torsional shear tests was performed ...