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以土的塑性极限分析理论和拱体理论为基础，结合挡土墙的长高比，提出了墙后砂土的两种三维破坏模式，并把两种模式与加筋相结合，求出了在加筋水平间距Sx和竖向间距Sx下作用在墙上主动土压力的上限解和设计的加筋长度。最后通过实例验证了本文的理论。
Based on the plastic limit analysis theory of soil and the arch body theory, combined with the length-to-height ratio of the retaining wall, two three-dimensional failure modes of the sand behind the wall are proposed, and the two modes are combined with the reinforcement to obtain the The upper bound of the active earth pressure acting on the wall and the length of the design reinforcement are applied at the stiffened horizontal spacing Sx and vertical spacing Sx. Finally, the theory of this paper is verified by examples.