Numerical Study on the Influence of Profile Shape on the Stability of a Nonhomogeneous Slope
Numerical Study on the Influence of Profile Shape on the Stability of a Nonhomogeneous Slope
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剖面形状对非均质边坡稳定性影响的数值研究
DOI：
10.1155/2021/3668378
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发表时间：
2021
影响因子：
1.8
通讯作者：
Chen Tao
中科院分区：
文献类型：
--
作者：
Yang Guoyu;Shang Tao;Han Liu;Chen Tao
为了研究坡面形状对非均质边坡稳定性的影响，采用简化的Bishop方法建立了不同坡面形状的条形力学模型。利用FLAC3D软件对370个不同剖面形状和地层序列的边坡模型进行了模拟分析。结果表明，在其他条件相同的情况下，WtS层序边坡比StW层序边坡更稳定。线性形状的斜坡最稳定。随着拱高的增加，凸坡稳定性降低，凹坡稳定性先略有增加后降低。当层序为WtS时，凸型和外型多线边坡的安全系数降低较慢。而当层序为StW时，凹形坡面和内折线坡面FoSs降低较慢。最大的x -位移集中在斜坡较陡的地方。对于不同的层序，陡坡处岩石强度越高，边坡越稳定，反之亦然。对于同一层序，多线形边坡的稳定性总是优于具有相同拐点的弯曲边坡。
To study the influence of profile shape on the stability of nonhomogeneous slopes, strip mechanical models of slopes with different profile shapes were established following the simplified Bishop method. Three hundred and seventy slope models with different profile shapes and strata sequences were simulated and analyzed with FLAC3D. The results show that slopes with weaker-to-stronger (WtS) strata sequences are, in most cases, more stable than slopes with stronger-to-weaker (StW) strata sequences when all other conditions are the same. Slopes with linear shapes are the most stable. With increasing arch height, the stability of convex slopes decreases, and the stability of concave slopes first increases slightly and then decreases. When the strata sequences are WtS, the factors of safety (FoSs) of slopes with convex and exterior polyline shapes decrease more slowly. However, when the strata sequences are StW, the FoSs of slopes with concave and interior polyline shapes decrease more slowly. The greatest X-displacements are concentrated in the steeper areas of the slopes. For different strata sequences, the higher the rock strength at the steeper position is, the more stable the slope is, and the opposite trend is also observed. For the same strata sequence, the stability of a polyline-shaped slope is always better than that of a curved slope with the same inflection point.