摩擦填料作用下土工充砂袋充填特性

为更准确计算土工充砂袋在充填完成时袋体形状及受力特性,针对袋体与充填料之间的摩擦对袋体的影响,通过在计算中引入填料与袋体间的摩擦,建立袋体的平衡方程,运用数值方法对方程进行求解.将袋体形状及张力与不考虑袋体与充填料之间的摩擦时的计算结果进行比较,发现袋体的形状及受力特性有显著的不同,同样条件下摩擦系数越大,充填完成时袋体的高度越大,最大宽度及触地宽度越小；袋体张力也不再是常数,而是随土工袋切角的增加而增大,最大张力远大于不考虑摩擦时的张力.

Study on the Characteristics of Geotextile Tube and Fillings with Friction

The sand filled geotextile tubes are widely used in the Soft soil foundation and Tidal flat reclamation.In order to obtain some accurate results about the tube’s geometric shape and mechanical characteristics,the friction between tube and sand slurry is considered,and the equilibrium equation of the soilbag is established,then the numerical method is used to solve the equation.Comparing the calculation results,with and without the friction,it is found that the shape and force change dramatically.The result shows that,under the same condition,the friction coefficient increase,the height of the tube after filled increases while the maximum width and contact width between soilbag and ground decrease;it also shows that the tension force of the tube is no longer a constant,it increases exponentially when the tangential angel becomes larger.