通过考虑拉筋存在的影响,应用准粘聚力理论和库仑理论,提出了拉断破坏形式的加筋土挡墙墙背土压力计算公式。研究结果发现:拉断破坏下的加筋土粘聚力具有了增量,提出的加筋土挡墙墙背侧向土压力比经典土压力和变系数法都小,提出的加筋土挡墙侧向土压力都随拉筋垂直间距增加而增加,加筋土挡墙侧向土压力随拉筋抗拉强度增加而减小,与土工格栅加筋土挡墙试验数据基本一致。 By considering the influence of the tensile reinforcement and applying the theory of quasi-cohesion and Coulomb theory, the calculation formula of the earth pressure on the earth retaining wall with pull-off failure is proposed. The results show that the cohesive force of the reinforced soil under tension and failure has an increment, and the proposed earth pressure of the reinforced earth retaining wall is smaller than that of the classical earth pressure and variable coefficient method. The proposed earth reinforcement The lateral soil pressure increases with the increase of the vertical spacing of the reinforcement. The lateral soil pressure decreases with the increase of the tensile strength of the reinforcement, which is consistent with the experimental data of the geogrid-reinforced soil retaining wall.