Abstract
Several potential failure modes generally exist in rock slopes because of the existence of massive structural planes in rock masses. A system reliability analyses method for rock slopes with multiple failure modes based on nonlinear Barton-Bandis failure criterion is proposed. The factors of safety associated with the sliding and overturning failure modes are derived, respectively. The validity of this method is verified through a planar rock slope with an inclined slope top and tension crack. Several sensitivity analyses are adopted to study the influences of structural-plane parameters, geometric parameters, anchoring parameters and fracture morphology on the rock slopes system reliability.
摘要
由于岩体中存在大量结构面,岩质边坡普遍存在多种潜在失稳模式。本文基于非线性 Barton-Bandis 破坏准则研究了多失稳模式下的岩质边坡系统可靠度分析方法。分别给出了滑动失稳和 倾覆失稳模式下的安全系数,并以一个坡顶和张拉裂缝倾斜的岩质边坡为例,验证了方法的有效性。 通过分析,研究了结构面强度参数、坡体几何参数、锚固参数和裂隙形态等对岩质边坡系统可靠度的 影响。
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Foundation item: Project(51978666) supported by the National Natural Science Foundation of China; Project(2018-123-040) supported by the Guizhou Provincial Department of Transportation Foundation, China; Project(2019zzts009) supported by the Fundamental Research Funds for the Central Universities, China
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Zuo, S., Hu, Cw., Zhao, Lh. et al. Barton-Bandis criterion-based system reliability analysis of rock slopes. J. Cent. South Univ. 27, 2123–2133 (2020). https://doi.org/10.1007/s11771-020-4435-6
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DOI: https://doi.org/10.1007/s11771-020-4435-6