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论文类型：期刊论文

发表时间：2012-05-01

发表刊物：CANADIAN GEOTECHNICAL JOURNAL

收录刊物：SCIE、EI、Scopus

卷号：49

期号：5

页面范围：574-588

ISSN号：0008-3674

关键字：slope stability; three-dimensional; strength-reduction finite-element method; geometric configuration; safety factor; critical slip surface

摘要：The vast majority of slopes, both natural and constructed, exhibit a complex geometric configuration and three-dimensional (3D) state, whereas slopes satisfying the assumption of plane strain (infinite length) are seldom encountered. Existing research mainly emphasizes the 3D dimensions and boundary effect in slope stability analysis; however, the effect of complex geometric ground configuration on 3D slope stability is rarely reported. In this paper, an elastoplastic finite-element method using strength-reduction techniques is used to analyze the stability of special 3D geometric slopes. A typical 3D slope underlain by a weak layer with groundwater is described to validate the numerical modeling, safety factor values, and critical slip surface for the 3D slope. Furthermore, a series of special 3D slopes with various geometric configurations are analyzed numerically, and the effects of turning corners, slope gradient, turning arcs, and convex-and concave-shaped surface geometry on the stability and failure characteristics of slopes under various boundary conditions are discussed in detail.