SLOPE FAILURES AT YOKOWATASHI AND NAGAOKA COLLEGE OF TECHNOLOGY DUE TO THE 2004 NIIGATA-KEN CHUETSU EARTHQUAKE AND THEIR ANALYTICAL CONSIDERATIONS(<Special Issue>Geotechnical Disasters in 2004 and 2005)

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概要

• 論文の詳細を見る

• Numerous natural or artificially embanked slope failures were caused by the 2004 Niigata-ken Chuetsu Earthquake. Characteristics of large scale natural slope failures that occurred at folding hills, river terraces, etc, were classified from a geometric structural view point. It was noted that surface failures occurred at steep cliffs and landslides occurred at gently slanting dip slopes. The cause of a landslide in a dip slope at Yokowatashi, Ojiya city was analytically investigated based on cyclic shear test results of the laminar sand at the bedding plane. This study revealed that the safety factor of the slope stability became momentarily smaller than 1.0 several times during the earthquake due to the small undrained shear strength of the tuff sand seam and the landslide behavior was simulated by an elasto-plastic dynamic finite element analysis where the strength decrease of the sand seam with increasing number of cycles was taken into consideration. The cause of destructive damage of a school building at Nagaoka National College of Technology (NNCT) was next examined by another elasto-plastic dynamic FEM. From the analysis results, it was confirmed that the building was pulled and twisted by the landslide of the bank shotcrete accompanied with pile fracture.

• 社団法人地盤工学会の論文

著者

• Nagai Hideaki

  Science System Division Crc Solutions Co. Ltd.

• Higuchi Kunihiro

  Kuroiwa Survey And Design Office

• Hotta Hiroyuki

  Institute Of Technology Shimizu Corporation

• ONOUE ATSUO

  Department of Civil Engineering, Nagaoka National College of Technology

• WAKAI AKIHIKO

  Department of Civil Engineering, Gunma University

• UGAI KEIZO

  Department of Civil Engineering, Gunma University

• FUKUTAKE KIYOSHI

  Institute of Technology, Shimizu Corporation

• KURODA SEIICHIRO

  National Institute for Rural Engineering

• Ugai Keizo

  Department Of Civil Engineering Gunma University

• Onoue Atsuo

  Department Of Civil Engineering Nagaoka National College Of Technology

• Wakai Akihiko

  Department Of Civil Engineering Gunma University

• Fukutake Kiyoshi

  Institute Of Technology Shimizu Corporation

• Kuroda Seiichiro

  National Agriculture And Food Res. Organization Ibaraki Jpn

関連論文

• SLOPE FAILURES AT YOKOWATASHI AND NAGAOKA COLLEGE OF TECHNOLOGY DUE TO THE 2004 NIIGATA-KEN CHUETSU EARTHQUAKE AND THEIR ANALYTICAL CONSIDERATIONS(Geotechnical Disasters in 2004 and 2005)
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