Three-dimensional analysis of slopes reinforced with piles
来源期刊：中南大学学报(英文版)2015年第6期
论文作者：GAO Yu-feng YE Mao ZHANG Fei
文章页码：2322 - 2327
Key words：three-dimensional rotational failure mechanism; stability of slopes; limit analysis; landslides; piles
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.
GAO Yu-feng(高玉峰), YE Mao(叶茂), ZHANG Fei(张飞)
(Key Laboratory for Geomechanics and Embankment Engineering of Ministry of Education
(Hohai University), Nanjing 210098, China)
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.
Key words:three-dimensional rotational failure mechanism; stability of slopes; limit analysis; landslides; piles
