论文部分内容阅读
为研究双向拉伸及往复水流周期对土工织物反滤性能的影响,将不同双向拉伸率下的土工织物与连续级配土组成反滤系统,利用梯度比渗透仪测试系统研究反滤性能随拉伸率与往复水流周期的变化规律.试验结果表明:随着循环往复水流周期的减小,土体内部土颗粒流失增多;在循环往复水流作用下,土体内部产生水力梯度向边界集中的现象,且土工织物的双向拉伸作用会加剧这种水力梯度边界集中现象,反滤系统的渗透稳定性降低;随着双向拉伸率的增加,循环往复水流作用下的土工织物渗透性能增强而保土性能降低.
In order to study the effect of biaxial stretching and reciprocating flow on geotextile filtration performance, the geotextiles with different biaxial extensibility and continuous grading soil were combined into a filtration system. The gradient filtration ratio Elongation and reciprocation of water flow.The experimental results show that the loss of soil particles in the soil increases with the decrease of the cycle of the reciprocating water flow and the concentration of hydraulic gradient inside the soil is concentrated to the boundary under the cyclic reciprocating water flow Phenomenon, and the biaxial stretching of geotextile will aggravate the concentration gradient of this hydraulic gradient boundary, and the penetration stability of the filtration system decreases. With the increase of biaxial stretching rate, the geotextile permeability under cyclic reciprocating flow increases Habitat reduced performance.