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土工袋层间摩擦是土工袋柔性挡土墙设计中应该考虑的关键因素,其大小直接决定了土工袋挡墙的内稳定性。通过铝棒土工袋的摩擦试验说明柔性土工袋层间摩擦与刚性体间摩擦特征的不同,进行了不同袋内材料、土工袋排列方式以及运行环境(水上或水下)等条件下的土工袋层间摩擦试验。结果表明:土工袋层间摩擦力随着袋体沿受力方向变形的增大而逐渐增大,当层间发生整体滑动时达到最大值,并趋于稳定;土工袋层间摩擦不仅与编织袋体的摩擦有关,而且受袋内材料粒径大小及排列方式的影响;土工袋浸泡于水下时,由于水的润滑作用使得编织袋间的摩擦作用减小,袋内材料为细颗粒的土工袋层间摩擦作用减小,而袋内材料为粗颗粒的土工袋层间摩擦变化不大。
The friction between geotextile bags is the key factor that should be considered in the design of geotextile bags ’flexible retaining wall. Its size directly determines the internal stability of geotextile bags’ retaining wall. Through the rubbing test of the geotextile bag with aluminum bars, the difference of the rubbing characteristics between the flexible geotextile bags and the rubbing between the rigid geotextile bags was analyzed. The geotextile bags with different bag materials, geotextile bags arrangement and operating environment (water or underwater) Interlayer friction test. The results show that the friction between geotextile plies increases with the deformation of the pockets along the direction of stress, and reaches the maximum when the plies slide integrally, and tends to be stable. The friction between plies is not only related to weaving Bag body friction, but also by the bag material size and arrangement of the impact; geotextile bags soaked in water, due to the lubrication of water makes the friction between the woven bag decreases, the bag material is fine particles The friction between the geotextile bags is reduced, while the rubbing between the geotextile bags with coarse particles is small.