Estimation of run-out distances of slope failures during earthquakes considering effects of rainfall

考虑降雨影响的地震期间边坡破坏的跳动距离估计

• 批准号: 18560491
• 负责人: TSUKAMOTO Yoshimichi
• 金额: $ 2.41万
• 依托单位: Tokyo University of Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560491/
• 关键词: Slone failure; Residual strength; Run-out distance; Degree of saturation; Laboratory tests; Simple analysis; 地震; 地すべり崩壊; 室内三軸試験

The soils samples were taken from the sites of slope failures which had occurred during 2004 Niigata Chuetsu Earthquake. A multiple series of laboratory triaxial tests were conducted to examine the effects of saturation on the residual strength of soils. The residual strength of soils subjected to slope failures was found to be strongly affected by the degree of water saturation, however in a different manner among the soils. There would be many factors coming into these relations, and it is suggested that the dependency of the residual strength on the degree of saturation can be better characterized by categorizing the relations in terms of types of soils such as weathered sandstone, weathered mudstone, weathered granite, volcanic soils and others.The residual strength of unsaturated soils was also examined by using a constant-volume direct shear test apparatus. Based on the past studies characterizing the flow and non-flow conditions of fully saturated soils in terms of soil density, the influence of saturation conditions such as water content and degree of saturation as well as state parameters such as soil density and confining stress was examined.A simple analysis was proposed to estimate the run-out distances of slope failures during earthquakes by adopting the re〓

土壤样品取自2004年新泻中越地震中发生的边坡破坏现场。通过室内三轴试验研究了饱和度对土的残余强度的影响。剩余强度的土壤受到边坡破坏的水饱和度的强烈影响，但在不同的土壤。影响这些关系的因素有很多，建议将这些关系按风化砂岩、风化泥岩、风化花岗岩、火山土等土壤类型进行分类，可以更好地表征剩余强度对饱和度的依赖性，并采用定容直剪试验装置对非饱和土的剩余强度进行了研究。本文在前人研究的基础上，分析了饱和度、饱和度等饱和条件以及饱和度、饱和度等状态参数对边坡失稳的影响，提出了一种简单的分析方法，即利用饱和度、饱和度等状态参数来估算边坡在地震作用下的失稳距离。

项目成果

Evaluation of run-out distances of slope failures during 2004 Niigata-ken Chuetsu Earthquake

2004年新泻县中越地震期间边坡破坏的跳动距离评估

• 发表时间: 2006
• 期刊: Soils and Foundations, Special Issue on Geotechnical Disasters in 2004and2005 46
• 作者: Tsukamoto;Y.;Ishihaza;K.;Kobari;Y.
• 通讯作者: Y.

Run-out distances of Iandslides of reclaimed soil deposits at the residential hill in 2004 niigata-ken Chuetsu Earthquake

2004年新泻县中越地震中住宅山的再生土沉积物滑坡的运行距离

• 发表时间: 2006
• 期刊: Proceedings of 2nd Japan-Taiwan Joint Workshop, Nagaoka Niigata, Japan, May18-20
• 作者: Tsukamoto;Y.;Ishihara;K.;Kobazi;Y.
• 通讯作者: Y.

Run-out distances of landslides of reclaimed soil deposits at the residential hill in 2004 Niigata-ken Chuetsu Earthquake

2004年新泻县中越地震住宅山丘再生土滑坡的运行距离

• 发表时间: 2006
• 期刊: Proceedings of 2nd Japan - Taiwan Joint Workshop, Nagaoka Niigata, Japan
• 作者: Tsukamoto;Y.;Ishihara;K.;Kobari;Y
• 通讯作者: Y

Residual strength of soils subjected to slope failures during earthquakes under direct shear tests

直剪试验下地震时边坡破坏土体的剩余强度

• 作者: Uemura;K.;Kobari;Y.;Ono;R.;Tsukamoto;Y.;Tatsuoka;F.;Hirakawa;D
• 通讯作者: D

一面せん断試験を用いた地震による地すべり崩壊砂質土の残留強度

地震滑坡破坏引起的砂土剩余强度单面剪切试验

• 发表时间: 2007
• 作者: 塚本良道;石原研而;小張泰英;上村 宏允・小張 泰英・小野 諒子・塚本 良道・龍岡 文夫・平川 大貴
• 通讯作者: 上村 宏允・小張 泰英・小野 諒子・塚本 良道・龍岡 文夫・平川 大貴