基于FLAC3D的含软弱夹层顺层岩质边坡失稳破坏模式分析研究

Analysis and research on instability and failure modesof stratified rock slopes with soft interlayers based on FLAC3D

高速公路建设过程中不可避免的会遇到含软弱夹层的高挖方情况,如果不能清晰地认识到边坡的潜在破坏模式就会对后期施工与运营造成较大地安全隐患。本文以贵州省黔东南境内某一段含软弱夹层的典型高边坡为例,进行了符合设计步续的数值模拟分析,得到了施工各阶段边坡的应力应变规律,并在此基础上更深入地研究了支护优化措施,为其他项目类似工程治理提供参考,具有一定的现实意义。

In the process of expressway construction,it is inevitable to encounter high excavation with weak interlayer.If the potential failure mode of slope can not be clearly recognized,it will cause great security risks to the later construction and operation.In this paper,a typical high slope with weak interlayer in southeastern Guizhou Province is taken as an example,and the numerical simulation analysis in accordance with the design step is carried out,and the stress and strain laws of the slope in each stage of construction are obtained.On this basis,the support optimization measures are further studied,which provides reference for similar projects in other projects and has certain practical significance.