土工袋挡墙二维模型试验研究

Study of Two-dimensional Model Test of Retaining Wall with Soilbags

为研究土工袋柔性挡墙在顶部竖向荷载作用下的挡墙变位模式及土压力系数分布情况,进行了袋装铝棒土工袋柔性挡墙二维模型试验,分析了不同竖向荷载作用下土压力系数沿墙高的分布规律.结果表明:土工袋挡墙位移从墙内到墙外逐渐减小,挡墙表面累积水平位移呈"上大下小"分布;土工袋挡墙破坏时,滑裂面呈"阶梯状",其高度与挡墙宽度相关;墙后土压力系数与荷载大小成正比,随挡墙深度的增加呈现先增大后不变的趋势,挡墙土压力系数与土工袋刚度有关.

In order to study the failure modes of retaining wall using soilbags and the distribution of lateral earth pressure coefficient,two-dimensional model tests of the retaining wall using soilbags are carried out. And the distribution of the wall earth pressure along the wall height is analyzed.The test results show that the lateral displacement decreases from the inside to the outside of the wall and decreases along the height of the wall.A stepped slide surface appears when the wall reaches the ultimate failure state,the height of which is influenced by the width of the wall.The lateral earth pressure coefficient increases linearly with the load,and increases nonlinearly along the wall height.The lateral earth pressure coefficient of the wall is related to the stiffness of soilbags.