土工袋层间摩擦特性试验研究

发布时间：2018-01-15 03:30

本文关键词：土工袋层间摩擦特性试验研究　出处：《岩土工程学报》2016年10期 　论文类型：期刊论文

【摘要】：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。
[Abstract]:Interlayer friction is the key factor to be considered in the design of the flexible retaining wall of geotextile. The internal stability of the retaining wall is directly determined by its size. Through the friction test of the aluminum bar geotextile bag, it is shown that the friction characteristics between the layer friction and the rigid body of the flexible soil bag are different, and the different materials in the bag are carried out. The results show that the friction between the bags increases with the deformation of the bags along with the deformation of the bags along the direction of force. When the whole interlayer sliding occurs, it reaches the maximum value and tends to be stable. The interlaminar friction of the geotextile is not only related to the friction of the woven bag, but also affected by the size and arrangement of the material in the bag. When the soil bag is immersed under water, the friction between woven bags decreases due to the lubricating effect of water, and the friction between layers of the bag with fine particles in the bag decreases. However, the interlaminar friction of the bag with coarse particles has little change.
【作者单位】：河海大学水利水电学院;
【基金】：国家自然科学基金面上项目(51379066)
【分类号】：TU476.4
【正文快照】： 土工袋是指将土、石等材料装入袋子后形成的袋装物。长期以来,土工袋被广泛地应用于防洪抢险、截流围堰以及修建一些简易道路、人防掩体工事等。近年来,Matsuoka与刘斯宏等[1-6]对土工袋增强机理、工程特性等进行了较为深入的研究,在此基础上将土工袋直接应用于构筑挡土墙。土

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