水泥土渗透系数影响因素的试验研究

摘要

In order to explore the effect of influencing factors on permeability coefficient of cement soil,different contents of cement were incorporated into the soil for testing,and the permeability coefficient of cement soil was tested.The influences of osmotic pressure,acid-base environment,void ratio,cement content and age on the hydraulic conductivity of cement soil were analyzed.The changes of impermeability of cement soil under various factors were discussed.The results showed that when the osmotic pressure is greater than 150 kPa,the effect of osmotic pressure on permeability coefficient is small,and the change of osmotic coefficient with the osmotic pressure remains basically unchanged.While the influence of pH and void ratio on the permeability coefficient is larger.What's more, the permeability coefficient decreases with the increase of pH.The permeability coefficient increases with the increase of porosity ratio. Besides,the permeability coefficient decreases with the increase of cement content,they have a good exponential relationship.The permeability coefficient decreased with age.%为探究水泥土渗透系数的影响因素,将不同含量的水泥掺入到土中进行试验,测试了水泥土的渗透系数.详细分析研究了渗透压强、酸碱环境、孔隙比、水泥含量和龄期对水泥土渗透系数的影响,探讨了多种因素下水泥土抗渗性能的变化情况.试验结果表明:当渗透压强大于150 kPa时其对渗透系数的影响较小,渗透系数随渗透压强的变化量基本保持不变;而pH和孔隙比对渗透系数的影响较大,渗透系数随pH的增大而减小,随孔隙比的增大而增大;渗透系数随水泥含量的增大而减小,二者呈较好的指数关系;此外,渗透系数随龄期的增大而呈下降趋势.