Japan Geoscience Union Meeting 2019

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[J] Poster

H (Human Geosciences ) » H-DS Disaster geosciences

[H-DS14] Geohazards in humid, tectonically active countries and their precursors

Mon. May 27, 2019 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Masahiro Chigira(Disaster Prevention Research Institute, Kyoto University), Hiroshi YAGI(Faculty of Art, Science and Education, Yamagata University), Satoru Kojima(Department of Civil Engineering, Gifu University), Taro Uchida(National Institute for Land and Infrastructure Management)

[HDS14-P13] Formation mechanism of bulge of slope that is sign of large-scale collapse

*tatsurou yoshimura1 (1.Daiichi Fukken Co., Ltd.)

Keywords:large-scale collapse, bulge of slope, seismic motion, relief inversion, gamma-ray survey

The fracture is distributed around main scarp and side cliff in slope failure. The formation of landslide mass results from dividing into parts by fracture. "Landslide mass formation model by dividing into fracture" was verified in large-scale landslide. The thick debris is distributed in the center part of the landslide mass. Bulge of slope is admitted before collapses. Bulge of slope is caused by seismic motion and the thick debris.