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首页> 外文期刊>Water >Seepage Piping Evolution Characteristics in Bimsoils -An Experimental Study
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Seepage Piping Evolution Characteristics in Bimsoils -An Experimental Study

机译：Bimsoils中渗流管道演化特征的实验研究

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摘要

Piping is a kind of seepage failure mode that commonly occurs under the influence of seepage force in soil materials. Many studies have been done to study the characteristics of piping for soil materials, however, the initiation and development mechanism of piping in bimsoils is poorly understood. In this work, an experimental program was set for investigating the evolution process of piping, in a self-developed servo-controlled flow–erosion–stress coupled testing system. All the studied samples with rock block percentage (RBP) of 30%, 40%, 50%, 60%, and 70%, were produced as a cylindrical shape(50 mm diameter and 100 mm height) by compaction tests with different hammer strike counts to roughly insure the same void ratio. The results show that the amount of rock blocks in bimsoil samples significantly influenced the initiation and development of piping. Furthermore, the stress state has a crucial influence on the critical hydraulic gradient, seepage velocity, permeability, erosion, and migration of soil particles. Moreover, interactions among soil matrix, rock blocks, and rock–soil interfaces control the seepage stability of the bimsoil sample.
机译：管道是一种渗流破坏模式，通常在土壤材料的渗流力影响下发生。已经进行了许多研究来研究用于土壤材料的管道的特性，但是，对土壤中管道的引发和发展机理了解甚少。在这项工作中，在自行开发的伺服控制的流-冲-应力耦合测试系统中，设置了一个实验程序来研究管道的演变过程。所有研究的岩石块百分比（RBP）为30％，40％，50％，60％和70％的样品均通过不同锤击力的压实试验制成圆柱形状（直径50 mm，高度100 mm）可以大致确保相同的空隙率。结果表明，积雪样品中的岩石块数量显着影响了管道的形成和发展。此外，应力状态对临界水力梯度，渗流速度，渗透性，侵蚀和土壤颗粒迁移具有至关重要的影响。此外，土壤基质，岩石块和岩石-土壤界面之间的相互作用控制了Bimsoil样品的渗流稳定性。

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