散体材料对圆弧形外凸挡墙的主动侧压力

应用极限平衡理论，假定圆弧形外凸挡土墙任意深度对应的滑移楔同时达到极限平衡条件，并恰当考虑滑移楔2个径向侧面上正压力（内力）的影响，建立了一个计算无黏性散体材料对圆弧形挡土墙侧压力的理论方法，能够适合墙后散料锥堆和平堆两种情况。该方法给出了侧压力随深度的非线性分布特征，与试验相符，并能够预测出当忽略滑移楔2个径向侧面上的正压力时，会导致理论值相比实测值偏小，将理论曲线与实测数据对照，证实了这一预测。当恰当考虑滑移楔2个径向侧面上的正压力时，能够使理论曲线与实测数据符合良好。

Granular-material-induced active lateral pressures on convex-arc walls

Based on the limit equilibrium theory, assuming that the limit equilibrium conditions of the slip wedges with respect to the all depths behind a convex-arc wall can synchronously be satisfied, as well as befittingly considering the effect of the normal stresses on the two sides of per slip wedge with respect to per depth; an improved computational method that can be used to calculate the distribution of the granular material pressure on the convex-arc wall with increasing depth is proposed. The computational method can present the nonlinear distributional characteristic of the granular material pressure, and can also predict that ignoring the normal stresses on the two sides of per slip wedge with respect to per depth will result in a lower calculated pressure distribution compared with the measured pressure data, which is proved to be correct via comparing the theoretic pressure curve with the measured pressure data; moreover, the theoretic pressure curve can agree well with the test data as it is considered correctly in calculation that the effect of the normal stresses on the two sides of per slip wedge with respect to per depth.