The formation of causative factors and the prediction of outbreak for repeated landslides on the same slope

同坡重复滑坡成因及爆发预测

• 批准号: 16380098
• 负责人: KAWABE Hiroshi
• 金额: $ 10.46万
• 依托单位: Niigata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16380098/
• 关键词: Landslide; Observation and prediction of natural phenomena; Stress release; Gravitational creep; Buckling; Salt weathering; International information exchange; Taiwan; 素因

Changes in geographical features of a slope after failure and re-instabilization of the slope by those were investigated for two large-scale landslides -- the Chiu-fen-erh-shan and the Tsaoling -- triggered by the Chi-Chi earthquake in 1999 in Taiwan. Furthermore, the mid Niigata prefecture earthquake and the Noto-Hantou earthquake which occurred during the term of this project were targeted for this study, too.1. For the Tsaoling landslide which has the record of landslides in the past 150 years, the clear correlation between estimated maximum acceleration and occurrence of landslide wasn't admitted. The occurrence of landslide can't be explained only by earthquake, that is, the influence of causative factors is suggested.2. Trial calculations by a simple model show that there is a possibility of buckling fold by gravitational creep and the position of buckling fold is on the lower part of slope.3. The buckling fold and erosion on the lower slope of both the landslides progress year a … More fter year. The GPS survey at the Tsaoling landslide showed the horizontal displacement of about 5cm/year on the central part of slope and 1cm/year on the lower part of slope and the upheaval of 1-2cm/year. The slope is instabilizing gradually.4. Simple seismic exploration was carried out to investigate decrease in the ground strength by stress release. The tendency that an elastic wave speed was decreasing at the rate of 400-600m/s a year was found.5. The distribution of landslides caused by the mid Niigata prefecture earthquake was analyzed by GIS. The area rate of landslides which appeared in the landslide topography was 5.26% and that on the non-landslide topography was 0.16%. This result shows that the occurrence of landslide by an earthquake is strongly controlled by the history of the ground and a landslide by an earthquake doesn't happen easily in a slope where a landslide hasn't occurred yet. This phenomenon is thought to concern the re-instabilization of a slope from which upper load is removed Less

以1999年台湾集集地震引发的九份二山与草岭两个大型山崩为例，探讨崩塌后边坡地貌的变化与再失稳。此外，本研究还针对本项目期间发生的新泻县中部地震和能登坂东地震。草岭滑坡有近150年来的滑坡记录，其最大加速度估计值与滑坡发生的相关性不明确。滑坡的发生不能仅仅用地震来解释，也就是说，要考虑到致滑因素的影响.通过简单模型试算表明，重力蠕变存在产生屈曲褶皱的可能性，且屈曲褶皱的位置位于斜坡下部。3.滑坡下部坡体的屈曲褶皱和侵蚀作用均发生于2000年， ...更多信息 年后。草岭滑坡GPS观测结果表明，滑坡中部水平位移约为5cm/年，下部水平位移约为1cm/年，隆起量约为1-2cm/年。边坡逐渐不稳定。4.简单的地震勘探进行了调查，在地面强度下降的应力释放。弹性波速度有以每年400- 600 m/s的速度减小的趋势.利用GIS技术分析了新泻县中部地震引起的滑坡分布。滑坡地形上的滑坡面积率为5.26%，非滑坡地形上的滑坡面积率为0.16%。这一结果表明，地震滑坡的发生受到地面历史的强烈控制，在尚未发生滑坡的斜坡上不容易发生地震滑坡。这种现象被认为与上部荷载移除后边坡的再失稳有关。

项目成果

地震動による斜面不安定化と斜面災害

地震引起的边坡失稳与边坡灾害

• 发表时间: 2004
• 作者: Naoki;WATANABE;Hideaki;MARUI;Hiroshi;KAWABE;Yutaka;GONDA;Hiromitsu;YAMAGISHIm;Kazunari;INABA;川邉 洋
• 通讯作者: 川邉 洋

Re-instabilization of a slope and slope disasters caused by an earthquake

边坡恢复稳定及地震引起的边坡灾害

• 发表时间: 2004
• 作者: Hiroshi;KAWABE
• 通讯作者: KAWABE

Sediment related disasters triggered by the Noto-Hantou Earthquake on March 25, 2007

2007年3月25日能登汉东地震引发的泥沙灾害

• 发表时间: 2007
• 期刊: J. of the Jpn. Soc. of Erosion Control Engineering 60-2
• 作者: Setsuo;HAYASHI;Kanji;KONDO;Hiroshi;KAWABE;Masaaki;HANAOKA;Kazuya;AKIYAMA;Shinya;NUMAMOTO;Shigeru;SUZUKI;Keiji;MUKAI;Mutsutoshi;FUKUDA
• 通讯作者: FUKUDA

地震特性と崩壊等の発生

地震特征及崩塌发生等

• 发表时间: 2007
• 作者: Setsuo;HAYASHI;Yoshinobu;UMEMURA;Hiromitsu;ISHIBASHI;Satoshi;TSUCHIYA;Kanji;KONDO;Shinya;NUMAMOTO;Takashi;JITOUSONO;Wen-Neng;WANG;Hiroshi;KAWABE;林 拙郎;川邉 洋
• 通讯作者: 川邉 洋

新潟県中越地震による土砂災害

新泻县中越地震引发的山体滑坡

• 发表时间: 2005
• 作者: Yosuke;TOSAKA;Yutaka;GONDA;Hiroshi;KAWABE;Masashi;YAMAMOTO;権田 豊;川邉 洋
• 通讯作者: 川邉 洋