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针对不同位移模式下的刚性挡土墙,提出考虑位移影响和土拱效应的土压力计算方法。将已有的内、外摩擦角与位移之间的关系式以及侧压力系数的表达式植入水平层分析法,推导出不同位移模式下的主、被动土压力的理论公式。并将计算结果与六个模型试验数据比较,结果表明:计算结果与试验数据的变化趋势基本一致,主动情况下吻合较好,被动稍差;从位移模式的角度来说,绕顶部转动(RT)模式吻合较好,绕底部转动(RB)模式被动情况与试验数据略有差距。总体而言,该方法基本上能够综合考虑挡土墙位移与土拱效应对土压力分布的影响。
According to the rigid retaining wall under different displacement modes, the earth pressure calculation method considering displacement effect and soil arching effect is proposed. The existing expressions of internal and external friction angle and displacement as well as the expression of lateral pressure coefficient are implanted into the horizontal layer analysis method to deduce the theoretical formulas of the main and passive earth pressures under different displacement modes. The results show that the trend of the calculation results and the experimental data are basically the same, the anastomosis is good and the activity is slightly worse under the active condition. From the perspective of the displacement mode, the rotation around the top (RT ) Mode is good, and there is a slight gap between the passive situation and the experimental data around the bottom of the rotation mode (RB). In general, this method can basically consider the influence of retaining wall displacement and soil arching effect on earth pressure distribution.