加筋土界面作用参数的拉拔试验研究

进行了不同填料、不同法向应力和不同含水率下的拉拔试验研究,结果表明:填料的颗粒越均匀,填料与筋带的作用效果越好;含水率对筋土界面参数的影响表现为:界面摩擦角随含水率的增大先增大后减小,界面黏聚力随含水率的增大一直减小,同时根据试验研究结果对反映加筋土界面摩擦特性的双曲线模型进行了修正,用幂函数对似摩擦系数与法向力之间的变化关系进行拟合,其结果比较理想。

Study on Interface Interaction Parameters of Reinforced Soil by Pull-out Test

The studies by pull-out tests under different fillers, different normal stresses and different water contents were carried out. The result shows that the more uniform the filler particles, the better the effect of interaction between the filler and the reinforcement strip; the influence of the water content on the interface parameters between reinforcement and soil is represented by that, with the increment of water content, the interface friction angle increases and then decreases, and the interface cohesion always decreases. Simultaneously, according to the test result, the hyperbolic model reflecting the interface friction feature of reinforced soil was corrected, and the change correlation between the mimic friction coefficient and normal stress was fitted with power function, which obtained a relatively ideal result.