土料分散特性试验研究  

Study on the Dispersive Identification of Soil

作　　者：任瑞平[1] 杨秀娟[2] 余佳辉 樊恒辉[2] 

机构地区：[1]杨凌职业技术学院,陕西杨凌712100 [2]西北农林科技大学,陕西杨凌712100

出　　处：《杨凌职业技术学院学报》2014年第4期7-10,共4页Journal of Yangling Vocational & Technical College

摘　　要：分散性土具有遇水分散流失的特性,容易造成堤坝等水利工程的破坏。采用双比重计、针孔、碎块、孔隙水可溶性阳离子和交换性钠离子百分比等5种试验方法,对宁夏某水电站大坝防渗土料分散性进行了研究分析,认为该防渗土料属于过渡性土。但是值得注意的是,4组土样的权重分析中分散性占的比重比较大,在设计中应注意当土样周围环境发生变化时(如河水水质)对土样分散性判别结果的影响。With dispersion characteristics ,dispersive soil lost with water ,and likely to cause the destruction of dams and other water projects .Using the double-hydrometer test ,pinhole test ,crumb test ,pore water soluble salt cation test and the percent-age of exchangeable sodium ions test ,the dispersibility of soil samples obtained from a hydraulic power plant in Ningxia were studied .It was showed that the soil samples were the transitional soils .But it was worth noting that the dispersive weighting analysis of soil samples were relatively more ,the attention should be paid on the design if the surrounding environment chan-ges ,such as river water .

关 键 词：分散性土 物理化学性质 针孔试验 碎块试验 双比重计实验 

分 类 号：TU41[建筑科学—岩土工程]