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土工合成材料加筋土挡墙是一种新型的挡土结构,它具有经济性好、性能优越、适应性强等优点。而筋材内力计算是该类结构设计的一个关键步骤,因此该类结构的推广应用需要一种合理易用的内力分析方法。该文讨论了几种土工合成材料加筋土挡墙的筋材内力分析方法,并对这些方法的优缺点进行评述。这些方法包括基于主动土压力系数的方法、基于经验的K刚度法、基于极限平衡的加筋边坡稳定分析方法、基于非线性弹性与变形协调的理论方法、以及基于增量非线性及填土剪胀性的筋材内力分析方法等。通过比较分析发现,如忽略面板作用且填土强度得到完全发挥,基于主动土压力系数以及极限平衡边坡分析的方法适用于分析加筋土挡墙在强度极限状态时的筋材内力,但填土强度的发挥水平决定于筋材的长期刚度。另一方面,如能合理考虑筋材的长期刚度以及面板的约束作用,基于筋土变形协调的理论分析方法适用于分析加筋土挡墙在正常工作荷载作用下的筋材内力。
Geosynthetics reinforced earth retaining wall is a new type of retaining structure, which has the advantages of good economy, superior performance and adaptability. The calculation of internal force of tendons is a key step in the design of this kind of structure. Therefore, the popularization and application of this kind of structure needs a reasonable and easy-to-use method of internal force analysis. This paper discusses the methods of internal force analysis of reinforced earth retaining walls with several geosynthetics, and reviews the advantages and disadvantages of these methods. These methods include methods based on active earth pressure coefficient, empirical K-stiffness method, limit equilibrium-based reinforced slope stability analysis method, theoretical method based on nonlinear elastic and deformation coordination, and based on incremental nonlinearity and fill Dilatancy of the tendons internal force analysis methods. Through comparative analysis, it is found that the method based on active earth pressure coefficient and extreme equilibrium slope analysis is suitable for analyzing the internal force of tendons when the reinforced earth retaining wall is in the strength limit state, The level of soil strength depends on the long-term stiffness of the tendons. On the other hand, if the long-term stiffness of slab and panel restraint can be reasonably considered, the theoretical analysis method based on the coordination of reinforcement deformation is suitable for analyzing the internal force of reinforced earth retaining wall under normal working load.