加筋土挡土墙边坡的稳定性分析Predicting the stability of the reinforced slope with retaining wall
姚爱国,M.Smith
YAO Ai-guo;1. M. Smith (1. Faculty of Engineering;
摘要(Abstract)：
加筋挡土墙边坡是一种新型的复合边坡加固技术,用传统的方法很难设计这种复杂的结构。以一工程实例叙述了采用弹塑性有限元法预测加筋土边坡的稳定性的方法;给出了不同设计方案下的位移;分析了土体力学参数对边坡最大水平位移的影响。结果表明,土体的弹性模量、内摩擦角与粘聚力是影响边坡位移的重要因素。这些土力学参数与边坡最大水平位移是非线性关系,且有呈现临界点的趋势。因此,适当控制填土的力学性能参数有助于达到安全节省的设计目标。
There is a difficulty in designing the new type of the reinforced slope by conventional methods. Instead, the finite element method is increasingly applied in this field. In this paper a practical case of predicting the desplacements of the reinforced slope with or without retaining wall by elasto-plastic finite element method is introduced. A comparison of the displacements is made between different designs and the effects of properties of the backfill on the horizontal displacements are analyzed.The results indicate that elastic modulus, the angle of internal friction, and cohesive stress of the backfill are main factors affecting the stability of the slope.There exist non-linear relations between the factors and the maximum horizontal displacements, and every curve seems to approach its critical point. Thus it is easily figured out that proper controlling of the soil parameters tends to help us to reach the goal of the design with safety and cost saving.
关键词(KeyWords)：
加筋土边坡;挡土墙;复合结构;弹塑性有限元
reinforced slope;retaining wall;complex structure;elasto-plastic finite element
基金项目(Foundation):
作者(Authors):
姚爱国,M.Smith
YAO Ai-guo;1. M. Smith (1. Faculty of Engineering;
参考文献(References)：
- [1] 梁波,孙遇祺.加筋土模型试验中的拉力破坏研究[J].岩土工程学报,1995,17(2) :83-887．
- [2] Desai C S,Chritian J T.Numerical Methods in Geotechnical Engineering[M]. McGraw-Hill Book Company, 1977．
- [3] Smith I M.Programming the Finite Element Method, London: John Welly, 1997．
- [4] 宰金珉,宰金璋.高层建筑基础分析与设计[M].北京:中国建筑出版社,1993．
- [5] Zienkiewicz.The Finite Element Method (3~(rd) ed) [M].London:McGraw-Hill,1977．
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