Developments of phenomenological approach on dynamic landslides movemnts

动态滑坡运动现象学方法的发展

• 批准号: 23310125
• 负责人: KAMAI Toshitaka
• 金额: $ 13.06万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23310125/
• 关键词: 地すべり; 東北地方太平洋沖地震; 高精度観測; 都市域; 宅地盛土; 都市; 2011年東北地方太平洋沖地震; ダイナミック; 観測; 東日本大震災; 宅地造成地; 地震

Field observations of landslide dynamic movements during earthquakes were planed and conducted in the landslides, the Midorigaoka #4 landslide, occurred in the widening fills by 2011 Tohoku earthquake. The largest seismic response of inclination was found at the weak layers, at the top soils of the base of fills and at the fragile lignite layer of bedrocks. These results indicate the self-dumping at the weak layers in ground structure. The effects of self-dumping varied depend on the thickness of weak layers and period characteristics of earthquakes. The relation between excess pore water pressure and horizontal peak ground velocity suggests that the landslide was initiated by the fully loss of shear strength of slip layer during the strong seismic motion. The performance of landslide during strong motion has not been discussed based on observed facts. Precise field observation on landslide movement during earthquake should be significant to mitigate the landslide risk in urban region.

在2011年，到2011年，在宽阔的填充物中，发生了地震期间的滑坡动态运动的现场观察，并在滑坡，Midorigaoka＃4滑坡进行。倾斜度的最大地震反应是在弱层，填充底部和基岩脆弱的褐煤层处的薄层。这些结果表明地面结构中弱层的自倾角。自倾角的影响各不相同，取决​​于弱层的厚度和地震的周期特征。过量的孔隙水压与水平峰值地面速度之间的关系表明，在强烈的地震运动期间，滑动层的剪切强度完全损失引发了滑坡。基于观察到的事实，尚未讨论强烈运动过程中滑坡的性能。地震期间对滑坡运动的精确野外观察对于减轻城市地区的滑坡风险应该是重要的。

项目成果

STRONG MOTION ESTIMATION IN ORITATE DISTRICT, SENDAI CITY, FOR THE 2011 OFF THE PACIFIC COAST OF TOHOKU EARTHQUAKE BASED ON EXTENDED SITE EFFECT SUBSTITUTION METHOD

• DOI: 10.2208/jscejseee.69.i_298
• 发表时间: 2013
• 作者: Y. Hata;T. Kamai;Gong-hui Wang;A. Nozu

Seismic response of valley fills to strong earthquakes on residential region in Tokyo

东京住宅区山谷充填物对强震的地震响应

• DOI: 10.3313/jls.48.334
• 发表时间: 2011
• 期刊: Journal of the Japan Landslide Society
• 作者: Takenaka;H;T. Nakamura;T. Kuramoto;T. Okamoto;and G. Toyokuni;釜井俊孝
• 通讯作者: 釜井俊孝

地震地すべりによる遺跡の形成と変形

地震滑坡造成的废墟的形成和变形

• 发表时间: 2012
• 作者: 杉本龍;柴田義孝;手塚公裕;釜井俊孝
• 通讯作者: 釜井俊孝

Landslides in urban region induced by the 2011 Tohoku earthquake and its dynamic monitoring -A result of socioeconomic changes after WW2 in Japan-

2011年东北地震引发的城市滑坡及其动态监测 -日本二战后社会经济变化的结果-

• 发表时间: 2013
• 作者: Kamai;T
• 通讯作者: T

(巻頭言)東日本大震災で見えてきた斜面災害研究の課題-地震国日本の事情-

（前言）东日本大地震揭示的边坡灾害研究问题～地震国家日本的情况～

• 发表时间: 2011
• 期刊: 新砂防
• 作者: Chigira;M.;釜井俊孝
• 通讯作者: 釜井俊孝