摘要
运用FLAC3D探讨了地震作用下顺倾层状岩体边坡软弱夹层参数(数量S、间距D、厚度H和倾角α)对边坡稳定性与锚杆轴力的影响。研究表明:地震作用下顺倾层状岩体边坡仅沿某一软弱夹层以倾倒-滑移的破坏模式失稳破坏,软弱夹层参数的改变并不会改变其破坏模式和主要破坏面位置;S、H越大,地震作用下坡面永久位移和锚杆轴力越大,D、α越大,永久位移和锚杆轴力越小;轴力沿杆身呈"山峰"式分布,主软弱夹层处"峰值"最高;研究可为地震作用下多层软弱夹层边坡的支护和抗震设计提供有益参考。
The influence of the soft intercalation parameters(number S, spacing D, thickness H and inclination angle α) of the sloped layered rock mass on the stability of the slope and the axial force of the anchor is discussed by using FLAC~(3D). The research shows: Under the action of earthquake, the slope of the sloping layered rock mass only destabilizes under the failure mode of dumping-slip along a weak interlayer and changes in the parameters of the weak interlayer do not change the failure mode and the main failure surface position. The greater the S and H, the greater the permanent displacement and axial force of the slope under the action of earthquake, the larger the D and α, the smaller the permanent displacement and axial force. The axial force is distributed along the shaft in a "mountain peak" type, and the "peak" is the highest at the main weak interlayer. The research can provide a useful reference for the support and seismic design of multi-layer weak interlayer slope under earthquake action.
引文
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