刘志彬1?覮,刘锋1,张书建2,雷松林2,白梅1,黄昊冉1.类毛细导水材料排水及抑制土体冻融效果研究[J].湖南大学学报:自然科学版,2020,(11):127~132
类毛细导水材料排水及抑制土体冻融效果研究
Study on Drainage Performance of Quasi Wicking Fabric and Its Control Effect on Freeze-thaw of Clayey Soil
  
DOI:
中文关键词:  类毛细导水材料  排水能力  冻胀  融沉  抑制效果
英文关键词:quasi wicking fabric  drainage performance  frost heave  thaw settlement  control effect
基金项目:
作者单位
刘志彬1?覮,刘锋1,张书建2,雷松林2,白梅1,黄昊冉1 (1. 东南大学 交通学院江苏 南京 211189 2. 吉林省高等级公路建设局吉林 长春 130062) 
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中文摘要:
      为解决季节性冻土地区路基土中水分积累引起的路基冻害问题,以商用高岭土为对象,通过对使用类毛细导水材料处理后的高岭土单元试样分别进行排水和冻融试验,研究类毛细导水材料排水及抑制土体冻胀的效果. 结果表明,类毛细导水材料可以在土体非饱和条件下将其中水分排出,使土样中水分含量降低20%~30%;类毛细导水材料包裹试样侧面时的排水效果优于将其埋设于试样中,且试样初始含水率越大,类毛细导水材料的排水性能发挥越充分;冻融试验中,土样初始含水率越高,其冻胀量和融沉量也就越大,类毛细导水材料能够使土样在冻胀融沉过程中的体积变化率降低5%~15%,从而有效抑制土体冻害.
英文摘要:
      To solve the frost damage problems of road embankment caused by moisture accumulation in subgrade in seasonal frozen soil area, drainage and freeze-thaw tests were carried out on kaolinite soil samples dealt with the quasi wicking fabric. It’s aimed to study the drainage performance of quasi wicking fabric and its control effect on frost heaving of soils. The test results indicate that the quasi wicking fabric can discharge water from unsaturated soil and reduce the moisture content of soil sample by 20%~30%. The drainage effect of the condition that the soil sample is laterally wrapped by wicking materials is better than that of placing the material in the sample. As the initial water content of the sample increases, the drainage performance of the quasi wicking fabric also becomes more effective. In the freeze-thaw test, frost heave and thaw settlement increases with the increasing initial water content of the soil sample. The quasi wicking fabric can effectively reduce the volume change of the soil sample during freeze-thaw process by 5%~15%, which thereby can inhibit the frost damage of the soil.
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