甲基硅酸钠稳定黄泛区粉砂土试验研究  

Experimental study on methyl-sodium stabilized silty soil

作　　者：袁玉卿[1] 贾淼[1] 李伟[2] 

机构地区：[1]河南大学土木建筑学院,河南开封475004 [2]北京市勘察设计研究院有限公司,北京100038

出　　处：《中国科技论文》2017年第7期831-833,844,共4页China Sciencepaper

基　　金：河南省科技发展计划项目(162102210026);河南大学省校区合作奖励补助资金资助项目(2016S12);开封市科技发展计划项目(1602014)

摘　　要：为了研究甲基硅酸钠对黄泛区粉砂土性能的影响,对掺有甲基硅酸钠的粉砂土进行了击实试验、强度试验、XRD测试及渗透能力测试。结果表明:试样的最大干密度和最佳含水率随掺入材料的不同发生改变;无侧限抗压强度随着养生时间的增加而增加;与同龄期的水泥稳定粉砂土相比,水泥甲基硅酸钠稳定粉砂土的无侧限抗压强度分别增加了17.43%、4.61%、16.76%;7d龄期试样无侧限抗压强度能代表28d龄期试样的无侧限抗压强度;X射线衍射结果表明,养生3d的水泥甲基硅酸钠稳定粉砂土中存在SiO_2、CaCO_3等化合物;水泥甲基硅酸钠稳定粉砂土试样的渗透系数为8.84×10^(-5),很好地提高了粉砂土的抗渗性。总之,甲基硅酸钠能明显改善粉砂土的力学性能与抗渗性能。To evaluate the effects of methyl-sodium on silty soil from the Yellow River flooded area of eastern Henan, compaction tests,strength tests？ XRD tests and penetration tests were conducted on samples of silty soil mixed with methyl-sodium. The re-sults showed that the optimum water content and maximum dry density of the samples were affected by different mixing materi-als. Unconfined compression strength increased with the increasing curing time for the same mix ratio. As compared with cement stabilized silty sand with the same age, the unconfined compressive strength of cement-methyl-sodium sand increased by 17. 43%, 4. 61%, 16. 76%, respectively. The results also showed that the strength with 7 days curing can represent that of 28 days cu-ring. X-ray diffraction test showed that there are Si〇 2 ？ CaC03 and other compounds in the cement-methyl-sodium sand after cu-ring for 3 days. Permeability coefficient of methyl-sodium stabilized silty sand sample was determined to be 8. 84X10-5 , which was effective to improve the permeability resistance of silty sand. In summary, methyl-sodium will improve the mechanical prop-erty and impermeability of silty soil.

关 键 词：道路工程 粉砂土 甲基硅酸钠 力学性能 抗渗性能 黄泛区 

分 类 号：U412.22[交通运输工程—道路与铁道工程]