| 陡倾坡外弱面控制的斜坡滑移-剪损变形破坏模式 |
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| 引用本文： | 周洪福,符文熹,叶飞,陈正峰.陡倾坡外弱面控制的斜坡滑移-剪损变形破坏模式[J].地球科学,2021,46(4):1437-1446. |
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| 作者姓名： | 周洪福 符文熹 叶飞 陈正峰 |
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| 作者单位： | 1.中国地质调查局成都地质调查中心, 四川成都 610081 |
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| 基金项目： | 四川省重点研发项目;第二次青藏高原综合科学考察研究资助;中国地质调查局地质调查项目 |
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| 摘 要： | 斜坡变形破坏和稳定性分析是各类工程建设中高度关注的问题.采用实例调查、理论分析、数值计算等技术方法，以雅砻江某水电工程坝址区右岸顺层岩质斜坡为例，研究总结了斜坡发育滑移-剪损变形破坏的成因机理、发育特征以及与弱面倾角和发育深度的关系.研究表明，滑移-剪损变形破坏通常发育在力学性能相对较差的薄层、互层状结构的顺层岩质斜坡或斜坡强-弱风化带内.斜坡发育滑移-剪损变形破坏与陡倾坡外弱面的倾角和发育位置密切相关.倾角在45°~65°之间或距斜坡表部水平距离小于80 m的弱面对斜坡发育滑移-剪损变形破坏的影响控制作用明显，并且弱面距斜坡表部水平距离比弱面倾角对斜坡发育滑移-剪损变形破坏的影响控制作用更强.研究成果可补充完善岩质斜坡变形破坏类型，具有重要的工程意义和实践价值.
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| 关 键 词： | 边坡工程 滑移-剪损 变形破坏模式 成因机理 发育特征 工程地质学 |
| 收稿时间： | 2020-03-05 |
Study on Sliding-Shearing Deformation and Failure Mode of Rock Slope with Steep Weak Structural Plane |
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| Zhou Hongfu,Fu Wenxi,Ye Fei,Chen Zhengfeng.Study on Sliding-Shearing Deformation and Failure Mode of Rock Slope with Steep Weak Structural Plane[J].Earth Science-Journal of China University of Geosciences,2021,46(4):1437-1446. |
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| Authors: | Zhou Hongfu Fu Wenxi Ye Fei Chen Zhengfeng |
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| Abstract: | The deformation and stability of rock slope are very important to engineering construction. Taking the right bank bedding rock slope of a hydropower project on Yalongjiang River as an example, in this paper it studies and summarizes the formation mechanism, development characteristics and the relationship with weak structural plane dip and development depth of sliding-shearing deformation and failure mode by in-situ investigation, theoretical analysis and numerical calculation. The research results show that sliding-shearing deformation and failure mode usually occurs in the bedding rock slope with poor mechanical properties or in the strong-weak weathering rock masses. The sliding-shearing deformation and failure of rock mass slope are closely related to the dip and development position of steep weak structural plane. The weak structural plane with 45°-65° dip or horizontal distance of less than 80 m from the slope surface is obviously influence to sliding-shearing deformation and failure of slope, and the influence of the horizontal distance between the weak structural plane and the slope surface is stronger than dip of weak structural plane on sliding-shearing deformation and failure of slope. This study is of great engineering significance and practical value to supplement the deformation and failure types of rock slope. |
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