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          夏澤富 ，郝   忠

 

                   （江蘇禹衡工程質量檢測有限公司 ，鹽城 224000)

摘   要 ：為探求降雨作用對緩傾巖質邊坡滑移破壞機制 ， 以某地區水庫滑坡的軟巖為地質原型 ，采用物理 模型試驗與數值模擬相結合的方法 ，再現邊坡受力 、變形特性。研究結果表明：在降雨和開挖條件下 ，巖層首 先彎曲 ，隨后發生平行于層理表面的張力破壞 ，繼續彎曲和翻轉導致彎曲張力失效 ，彎曲和開裂現象向斜坡上 部延伸 ，最終局部張力失效滲透到斜坡頂部 ，巖石沿表面向下滑動 ，造成邊坡不穩定 ，成果可為類似工程提供 參考。

關鍵詞：緩傾巖質邊坡 ；有限離散元法 ；破壞機制 ；離心機模型

中圖分類號：TV871            文獻標志碼：A

           

文章編號： 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

作者簡介： 夏澤富  (1992—) ,   男 ，本科 ， 工程師 ，研究方 向 ：水利工程 ，巖土工程勘察設計。

通信作者： 郝    忠  (1983—) ,   男 ，碩士 ，高級工程師 ，研 究方向：巖土工程。

收稿日期：2024 - 12 - 20