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          夏泽富 ，郝   忠

 

                   （江苏禹衡工程质量检测有限公司 ，盐城 224000)

摘   要 ：为探求降雨作用对缓倾岩质边坡滑移破坏机制 ， 以某地区水库滑坡的软岩为地质原型 ，采用物理 模型试验与数值模拟相结合的方法 ，再现边坡受力 、变形特性。研究结果表明：在降雨和开挖条件下 ，岩层首 先弯曲 ，随后发生平行于层理表面的张力破坏 ，继续弯曲和翻转导致弯曲张力失效 ，弯曲和开裂现象向斜坡上 部延伸 ，最终局部张力失效渗透到斜坡顶部 ，岩石沿表面向下滑动 ，造成边坡不稳定 ，成果可为类似工程提供 参考。

关键词：缓倾岩质边坡 ；有限离散元法 ；破坏机制 ；离心机模型

中图分类号：TV871            文献标志码：A

           

文章编号： 1005- 8249   (2025)  03- 0096- 05 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .03 .018

XIA Zefu，HAO Zhong

（Jiangsu Yuheng Engineering Quality Inspection Co., Ltd.，YanCheng224000,China)

Abstract: To prevent the occurrence of serious geological disasters caused by the sliding failure of gently dipping rock slopes, this study investigates the mechanisms of sliding failure in reservoir rock slopes under the influence of rainfall, aiming to provide a scientific basis for geological disaster prevention. A combination of physical model tests and numerical simulations was employed. Soft rock from a reservoir landslide in a specific region was used as the geological prototype. Centrifuge model tests were conducted to simulate the gravity field and reproduce the stress and deformation characteristics of the slope. Numerical simulations, using the finite-discrete element method, addressed issues related to material deformation and fracture. The findings indicate that under rainfall and excavation conditions, rock layers initially bend, followed by tensile failure parallel to the bedding planes. Continued bending and overturning result in bending-induced tensile failure. The bending and cracking phenomena propagate toward the upper part of the slope, eventually leading to localized tensile failure at the slope crest. This failure triggers downward sliding of the rock along the surface, ultimately causing slope instability. The results of this study provide a valuable reference for similar engineering projects.

      Keywords: gently inclined rock slope; finite discrete element method; failure mechanism; centrifuge mode

作者简介： 夏泽富  (1992—) ,   男 ，本科 ， 工程师 ，研究方 向 ：水利工程 ，岩土工程勘察设计。

通信作者： 郝    忠  (1983—) ,   男 ，硕士 ，高级工程师 ，研 究方向：岩土工程。

收稿日期：2024 - 12 - 20