EN-1对黄土性固化土水分垂直入渗特征的影响  

Effects of EN-1 Soil Stabilizer on Water Vertical Infiltration Characteristics for Loess Stabilized Soil

作　　者：刘月梅[1,2] 张兴昌[3] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100 [2]延安职业技术学院,延安716000 [3]中国科学院水利部水土保持研究所,陕西杨凌712100

出　　处：《农业机械学报》2012年第11期65-73,共9页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家重点基础研究发展计划(973计划)资助项目(2007CB106803);中国科学院知识创新工程重要方向项目(KZCX2-YW-441)

摘　　要：采用一维垂直入渗试验方法,对不同容重、不同固化剂掺量处理的固化土水分入渗过程进行了研究。结果表明:黄绵土容重在1.2～1.4 g/cm3范围内,土壤容重对黄土性固化土的入渗能力有较大影响,土壤容重越大,对应于同一时刻入渗率越低,累积入渗量越小,湿润锋推进距离越短。3种土壤容重条件下,不同EN-1固化剂掺量对累积入渗量和湿润锋运移距离的影响均显著(P<0.05),且随着固化剂掺量增大,累积入渗量和湿润锋运移距离均有先增大后减小的趋势;固化剂掺量在0.05%～0.1%范围内累积入渗量最大;累积入渗量与湿润锋运移距离呈良好的线性关系。固化剂掺量对土层含水率的影响在低容重(1.2 g/cm3)条件下明显,随着容重增加,影响逐渐减小。利用Philip模型、Kostiakov经验公式和指数公式对固化土入渗率与入渗历时的关系进行拟合时发现,Kostiakov公式拟合值更接近于实测值,且容重越大,拟合精度越高。Characteristics and dynamic changes of soil water infiltration under different soil bulk density and different stabilizer content were analyzed by one-dimensional vertical infiltration experiments. The results showed that soil bulk density had significant influences on infiltration capacity of stabilized soil from 1.2 - 1.4 g/cm^3 of soil bulk density ranged. The influences of soil bulk density on infiltration rate were stable and constituent. With increasing soil bulk density, cumulative infiltration decreased. Stabilizer amendment amount had effects on cumulative infiltration and wetting front under the same soil bulk density. Cumulative infiltration were the highest at 0.05% - 0.1% amendment amount of EN - 1 stabilizer, and were higher the control. There was good linear relationship between the amount of cumulative infiltration and the wetting front distance. With increasing amendment amount of EN - 1 stabilizer, cumulative infiltration and wetting front had trend of increase first and decrease then. Fitting the relationship between infiltration rate and time with Philip model, Kostiakov empirical formula and index formula, the results showed Kostiakov formula was more accurate than other models and fitted values of its had the best results at higher soil bulk density.

关 键 词：EN-1土壤固化剂 入渗率 累积入渗量 数学模型 

分 类 号：S156.2[农业科学—土壤学] S152.7[农业科学—农业基础科学]