STUDY ON DIP SLOPE FAILURE AT HIGASHI TAKEZAWA INDUCED BY 2004 NIIGATA-KEN CHUETSU EARTHQUAKE

SOILS AND FOUNDATIONS

JUNICHI KOSEKI³  REIKO KUWANO³  HIROSHI KAMEYA¹  JIRO KUWANO²  JIANLIANG DENG⁴  YUKIKA MIYASHITA³ 

[1] Energy Business Division, OYO Corporation;Geosphere Research Institute, Saitama University;Institute of Industrial Science, University of Tokyo;Shanghai Jiao Tong University

关键词: dip slope;    Janbu method;    Newmark's sliding block method;    simple shear test;    strain softening;    triaxial test;    (IGC: D6/D7/E8/E12/E13);   

DOI  :  10.3208/sandf.51.929

学科分类：建筑学

来源: Japanese Geotechnical Society / Jiban Kogakkai

【 摘 要 】

References(41)Cited-By(5)An extensive number of slopes failed in the 2004 Niigata-ken Chuetsu Earthquake. Among them, a dip slope containing a weak layer in Yamakoshi Village (currently Nagaoka City) was investigated intensively. Regarding its morphological characteristics, it is argued that the earthquake reactivated a pre-existing failure plane which then formed most of the present sliding plane. In order to reveal the strength properties of the weak layer that formed the sliding plane, including the behavior against cyclic loading, a series of triaxial compression tests and simple shear tests was performed on undisturbed specimens that were retrieved by block sampling from the site. Based on the test results, a stability analysis and the calculation of the earthquake-induced displacement were performed. By extending Newmark's sliding block analysis, while considering the effects of the irregular geometry of the sliding plane and its strain-softening properties, a reasonable simulation of the process of this slope failure could be provided.

【 授权许可】

Unknown