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.

包括神之助谷两边在内的整个白山山脊都变得不稳定了。通过野外勘察和航片图像分析，发现神之助河谷左岸岩质边坡的失稳只是神之助河谷两侧岩体复杂滑动的一部分。整个滑坡似乎是以渐进式失败的形式发生的。对特大山体崩塌进行了三维岩水耦合稳定性分析。该分析是基于简单的力平衡的岩石块包围着几个平面的不连续性和分离的邻近岩体在岩石边坡。通过对航片的勘探和图像分析，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共同作用下，岩体的稳定性由嵌入形成滑动面的薄间隙中的材料的抗剪性来维持。当抗剪强度不足以抵抗驱动力时，边坡就会发生破坏。结果表明，用三维力平衡的简单原理来估算含裂隙的软弱粘性材料边坡的安全系数是足够的。

项目成果

J.Kuwano,A.Takahashi,A.Hiro-oka & K.Yamauchi: "Shaking table tests on caisson type quay wall in centrifuge"Proc.of 2^<nd> Int.Conf.on Earthquake Geotechnical Eng. 1. 365-370 (1999)

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。

H.Ohta,T.Yamakami,K.Ohmori,Y.Morikawa & A.Iizuka: "Interpretation of in-situ and laboratory tests on soft clays"Proc.Conf.On Geotechnical Site Charactarization,Robertson & Mayne(eds) Balkema,Rotterdam . 1. 403-408 (1998)

H.太田,T.山上,K.大森,Y.森川