定远县膨胀土特征研究

Study on Swelling Soil Features in Dingyuan County

利用X射线衍射法等技术手段,对定远县膨胀土的矿物组成和自由膨胀率等特征进行了试验研究。结果表明:该县膨胀土属于弱膨胀潜势土,粘土矿物成分以高岭石、伊利石为主,膨胀土膨胀潜势地区差异较大,自由膨胀率与蒙脱石含量、塑性指数及液限均有一定相关性。最后针对已建和拟建工程,分别提出了膨胀土防治建议。

With the application of an X-ray diffraction method and other technical means,an experiment study was conducted on the mineral composition and free swelling ratio and other features of the swelling soil in Dingyuan County.The results showed that the swelling soil in the county was a weak swelling soil in potential,the mineral components of the clay would be a kaolinite and illite mainly,the swelling potential of the swelling soil would have a big difference in the area and the free swelling ratio would have a certain relativity to the montmorillonite content,plastic index and liquid limit.Finally,the proposals to prevent and control the swelling soil were individually provided according to the constructed projects and the projects to be constructed.