Application of Rock/Water Coupled 3-D Stability Analysis to Colossal

岩石/水耦合 3-D 稳定性分析在巨型工程中的应用

• 批准号: 10555162
• 负责人: OHTA Hideki
• 金额: $ 1.47万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10555162/
• 关键词: Mt. Hakusan; stability analysis; exploration; aerial photograph; erosion; checkdam

The whole area of the ridge of Hakusan including both sides of Jinnosuke Valley is becoming unstable. As the results of careful exploration and image analyses of aerial photograph, it was found that the instability of the rock slope on the left bank of Jinnosuke Valley is only a part of complex slide of rock masses on both sides of Jinnosuke Valley. The whole slide seems to be taking place in a form of progressive failure. Rock/water coupled 3-D stability analyses are applied to the colossal mountain-collapse. The analysis is based on simple force equilibrium of a block of rock surrounded with several planes of discontinuity and separated from the neighbouring rock mass in a rock slope. The several planes of discontinuity were found by the exploration and image analyses of aerial photograph. Driven by the own weight of the rock block together with the ground water pressure acting on the planes of discontinuity, the stability of rock mass is maintained by the shear resistance of the materials embedded in the thin clearance forming the slip surface. A slope failure takes place when the shear strength is not strong enough to resist the driving forces. It was found that the simple principle of three dimensional force equilibrium is good enough to estimate the factor of safety in the slopes of rock mass containing the cracks filled with soft clayey materials.

包括神之助溪谷两侧在内的白山山脊整个地区正在变得不稳定。经过仔细勘探和航空照片图像分析的结果，发现神之助溪谷左岸岩质边坡的失稳只是神之助溪谷两侧岩体复杂滑动的一部分。整个幻灯片似乎正在以一种渐进式失败的形式发生。岩石/水耦合 3-D 稳定性分析适用于巨大的山体崩塌。该分析基于岩石块的简单力平衡，该岩石块被多个不连续面包围并与岩石斜坡中的相邻岩体分离。通过航空照片的探索和图像分析，发现了几个不连续面。在岩块自重和作用在不连续面上的地下水压力的驱动下，岩体的稳定性是通过嵌入形成滑移面的薄间隙中的材料的抗剪力来维持的。当剪切强度不足以抵抗驱动力时，就会发生边坡破坏。结果发现，三维力平衡的简单原理足以估算含有软粘土材料裂缝的岩体边坡的安全系数。

项目成果

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J.桑野,A.高桥,A.广冈

長原久克,鶴山直義,今井努,伊藤雅夫,石黒健,藤山哲雄,太田秀樹: "人工水平排水材を用いた空港盛土の挙動解析"国際ジオシンセティックス学会日本支部,ジオシンセティックス論文集. 第15巻. 58-67 (2000)

Hisakatsu Nagahara、Naoyoshi Tsuruyama、Tsutomu Imai、Masao Ito、Ken Ishiguro、Tetsuo Fujiyama、Hideki Ota：“使用人工水平排水材料的机场路堤的行为分析”国际土工合成材料协会日本分会，土工合成材料论文集第 15 卷 58-67（2000 年）。 ）

H.Ohta,K.Ohmori,T.Hirose,N.Ohfuka & T.Yamakami: "Stability analyses of seven rock slope failures"GeoEng2000,An International Conference on Geotechnical & Geological Engineering. (2000)

H.Ohta,K.Ohmori,T.Hirose,N.Ohfuka

P.Thirapong,H.Ohta,A.Iizuka,and M.Hashimoto: "Effects of some parameters on braced-excavation of soft clay by numerical studies"Proceedings of the Internationals Symposium-IS-YOKOHAMA 2000, Coastal Geotechnical Engineering in Practice. 1. 351-356 (2000)

P.Thirapong、H.Ohta、A.Iizuka 和 M.Hashimoto：“通过数值研究对软粘土支撑开挖的一些参数的影响”国际研讨会记录 - IS-YOKOHAMA 2000，沿海岩土工程实践。

太田秀樹: "鏡を利用した切土・盛土斜面の変動観測技術" 地盤に関する維持・補修・管理技術に関するシンポジウム論文集. 63-65 (1998)

Hideki Ota：“使用镜子观察路堑和路堤坡度变化的技术”与地面相关的维护、修复和管理技术研讨会论文集 63-65 (1998)。