Laboratory reproduction of weathering and deterioration of soft-rock slopes and its application to disaster mitigation.

软岩边坡风化劣化的实验室再现及其在减灾中的应用

• 批准号: 21246076
• 负责人: TOWHATA Ikuo
• 金额: $ 26.21万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21246076/
• 关键词: 物理的風化; 岩石; 三軸圧縮試験; ポイントローディング; 斜面崩壊; 化学的風化; S波伝播速度; 凍結融解; せん断強度; 室内実験; 現場実験; 温度効果; 軟岩; S波速度; 一軸圧縮; 三軸圧縮

Physical weathering of rock material induces loss of rigidity and deterioration of strength. This process was first reproduced in a newly developed testing device in which water-submergence, freezing, and heating were repeated. This test was able to reproduce the said rigidity loss and strength deterioration. Second, field studies were made in slope instability areas in both Japan and Pakistan where slope disasters have been significant. By using the knowledge thus collected, a methodology was developed by which the temporal progress of weathering and deterioration is traced and the mitigation of slope disaster is initiated at a critical time when the instability is imminent.

岩石材料的物理风化会导致刚性丧失和强度的恶化。该过程首先是在新开发的测试装置中复制的，在该设备中，重复了水含水，冷冻和加热。该测试能够再现上述刚性损失和强度恶化。其次，在日本和巴基斯坦的坡度不稳定区域进行了现场研究，那里的坡度灾难是重大的。通过使用如此收集的知识，开发了一种方法，通过该方法可以追溯风化和恶化的时间进步，并在不稳定性的关键时期开始缓解斜坡灾难。

项目成果

A simplified technique for slope stability assessment based on insitu S-wave velocity measurement

基于原位横波速度测量的边坡稳定性评估简化技术

• 作者: Qureshi;Mohsin Usman;Yamada;S. and Towhata;I.
• 通讯作者: I.

Geotechnical structure damages during the 2009 Typhoon Morakot

2009 年台风莫拉克期间岩土结构受损

• 发表时间: 2010
• 期刊: Bulletin of ISSMGE
• 作者: Lee;W.F.;Towhata;I.
• 通讯作者: I.

Analysis of the mechanisms of slope failures triggered by the 2007 Chuetsu Oki earthquake

• DOI: 10.1007/s10706-011-9411-3
• 发表时间: 2011-05
• 期刊: Geotechnical and Geological Engineering
• 影响因子: 1.7
• 作者: I. Gratchev;I. Towhata

Water submergence effects on geotechnical properties of crushed mudstone

水淹没对碎泥岩岩土性能的影响

• 发表时间: 2009
• 作者: Aziz;M.
• 通讯作者: M.

In-situ direct shear tests on weathered rock materials for slope failure risk assessment

风化岩石材料原位直剪试验用于边坡破坏风险评估

• 发表时间: 2009
• 作者: Qureshi;M.U.
• 通讯作者: M.U.