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以墙后为无粘性填土且填土面作用均布超载的竖直刚性挡土墙为研究对象,考虑土拱效应及水平土层间的剪应力,引入水平层分析法,得到平动模式下均布荷载引起的主动土压力表达式。计算表明,地面超载引起的主动土压力沿墙高并非均匀分布,而是显现出上大下小的非线性特征,这样合力作用点的高度将高于墙高的二分之一。因此按传统方法计算土压力时将会高估挡土墙的抗倾覆稳定性。
Taking the vertical rigid retaining wall with non-viscous filling behind the wall and with uniform overloading effect on the filling surface as the research object, horizontal soil layer analysis method is introduced to consider the soil arching effect and the horizontal soil layer effect, and the translational mode Active Earth Pressure Caused by Lower Even Load. The calculation shows that the active earth pressure caused by ground overloading is not evenly distributed along the wall, but shows a nonlinear feature of big, big and small, so that the height of the resultant force point will be higher than one-half of the height of the wall. Therefore, the traditional method of calculating earth pressure will overestimate the anti-overturning stability of the retaining wall.