Abstract
Based on the upper bound of limit analysis, the plane-strain analysis of the slopes reinforced with a row of piles to the 3D case was extended. A 3D rotational failure mechanism was adopted to yield the upper bound of the factor of safety. Parametric studies were carried out to explore the end effects of the slope failures and the effects of the pile location and diameter on the safety of the reinforced slopes. The results demonstrate that the end effects nearly have no effects on the most suitable location of the installed piles but have significant influence on the safety of the slopes. For a slope constrained to a narrow width, the slope becomes more stable owing to the contribution of the end effects. When the slope is reinforced with a row of piles in small space between piles, the effects of group piles are significant for evaluating the safety of slopes. The presented method is more appropriate for assessing the stability of slopes reinforced with piles and can be also utilized in the design of plies stabilizing the unstable slopes.
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Foundation item: Projects(51278382, 51479050) supported by the National Natural Science Foundation of China; Project(2015CB057901) supported by the National Key Basic Research Program of China; Project(201501035-03) supported by the Public Service Sector R&D Project of Ministry of Water Resource of China; Project(2014B06814) supported by the Fundamental Research Funds for the Central Universities, China; Project(B13024) supported by the “111” Project; Project (YK913004) supported by the Open Foundation of Key Laboratory of Failure Mechanism and Safety Control Techniques of Earthrock Dam of the Ministry of Water Resources, China
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Gao, Yf., Ye, M. & Zhang, F. Three-dimensional analysis of slopes reinforced with piles. J. Cent. South Univ. 22, 2322–2327 (2015). https://doi.org/10.1007/s11771-015-2757-6
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DOI: https://doi.org/10.1007/s11771-015-2757-6