Mechanisms of long travelling Aratozawa Landslide on gentle sliding surface in consolidated silt

固结淤泥缓滑面上长程荒泽滑坡的机制

• 批准号: 23658136
• 负责人: OKADA Yasuhiko
• 金额: $ 2.5万
• 依托单位: Forestry and Forest Products Research Institute
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-23658136/
• 关键词: 崩壊; 地すべり; 土石流; 崩壊・地すべり・土石流

Skeletal structure in soil from a sliding surface of Aratozawa Landslide was investigated to reveal the sliding mechanisms using Cryo-SEM. Many cylindrical and latticed grains were found in silt stone that formed the sliding surface of the landslide, while those were not found in the tufa that overlay the silt. Crushing of cylindrical and latticed grains was likely leading to pore-fluid pressure build-up resulting in the long travelling distance (300m) on the gentle slope (< 4 degrees) of the Aratozawa Landslide.

利用冷冻扫描电镜（Cryo-SEM）对新里泽滑坡滑动面土壤中的碎屑结构进行了研究，以揭示滑坡的滑动机理。在滑坡滑动面的粉砂岩中发现了大量的柱状和网格状颗粒，而在粉砂岩上覆的石灰华中未发现柱状和网格状颗粒。圆柱形和网格状颗粒的破碎可能导致孔隙流体压力增加，导致在Aratozawa滑坡的缓坡（< 4度）上的长行程（300 m）。

项目成果

宮城県栗原市・日影森地すべりの長距離運動機構に関する土質力学的検討

宫城县栗原市日影森滑坡长距离运动机制的土力学研究

• 发表时间: 2012
• 作者: Yasuhiko OKADA;Ushio KUROKAWA;Shiho ASANO;岡田康彦
• 通讯作者: 岡田康彦

日影森で発生した地すべりの流動化機構の土質力学的検討

森日影滑坡流化机制的土力学研究

• 期刊: 森林総合研究所研究報告
• 作者: 岡田康彦;黒川潮;浅野志穂
• 通讯作者: 浅野志穂

Examining mechanisms of Hikagemori landslide triggered by Iwate-Miyagi Nairiku Earthquake in 2008 by laboratory soil tests

通过实验室土壤测试研究 2008 年岩手宫城内陆地震引发的日影森山体滑坡的机制

• 期刊: Proceedings of International Symposium on Earthquake-induced Landslides
• 作者: Yasuhiko OKADA;Ushio KUROKAWA;Shiho ASANO
• 通讯作者: Shiho ASANO