An extended 3D limit analysis of slope stability considering prestressed anchor cables reinforcement

被引:11
作者
Hong, Yong [1 ]
Shao, Zhushan [1 ]
Wu, Kui [1 ]
Shi, Guangbin [1 ]
Wu, Saisai [1 ]
Jiang, Song [1 ]
机构
[1] Xian Univ Architecture & Technol, Xian 710055, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Prestressed anchor cables; Three dimension; Slope stability; Factor of safety; Limit analysis; 3-DIMENSIONAL STABILITY;
D O I
10.1007/s43452-023-00606-w
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Prestressed anchor cables have been extensively utilized in slope reinforcement engineering. Combining limit analysis with the strength reduction method (SRM), this article presents a new method to assess the three-dimensional (3D) stability of slopes with prestressed anchor cables. Compared with traditional methods, the factor of safety (F-S) calculation method is modified by considering prestressed anchor cable reinforcement by applying a horn-like shape 3D rotational failure mechanism. To validate the proposed method, comparisons between unreinforced slopes and those reinforced with a row of anchor cables are carried out using optimization algorithms and procedures. The minimum width-to-height (B/H) ratio for which the slope can be analyzed using two-dimensional (2D) analysis under different F-S calculation accuracies is obtained. To evaluate the consequences of the model parameters, parametric analysis is performed, assessing the F-S sensitivity, 3D effects, anchor cable axial force, anchor position, anchor orientation, slope angle, internal friction angle, and cohesion on slope stability. Additionally, slope stabilities under the reinforcement of a row and multiple rows of anchor cables are compared and analyzed. The proposed approach can guide the design and evaluation of slope reinforcement with prestressed anchor cables.
引用
收藏
页数:16
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