| 马力梦露,沈梦芬,何洋,景冯,牧杰,张文勇.膨胀土粒径分布测量方法的试验研究及曲线拟合[J].安徽建筑大学学报,2014,22(): |
| 膨胀土粒径分布测量方法的试验研究及曲线拟合 |
| Experimental Study of Expansive Soil Particle Size and Distribution Measurement Curve Fitting Method |
| 投稿时间：2014-07-14 修订日期：2014-10-16 |
| DOI： |
| 中文关键词: 粒径分布曲线 移液管法 密度计法 激光法 回归分析 |
| 英文关键词: particle -size distribution(PSD) densimeter method pipet method laser method regression analysis |
| 基金项目:国家自然科学基金资助项目(40972194) |
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| 中文摘要: |
| 土体的粒度成分在土体的定名、鉴别、描述及预测土体工程性质上具有重要应用。为了研究非饱和土体粒度成分的测量方法及测量结果,本文分别采用密度计法、移液管法和激光粒度仪法对合肥地区9种非饱和膨胀土进行了粒度测量,得到了相应的粒径分布,并采用Fredlund模型进行了曲线拟合,得到了试验土体的粒径分布曲线(PSD),求得了相应的曲线拟合参数的均值、均方差及变异系数。在此基础上,对3种测量方法的PSD曲线拟合参数进行了回归分析,求得了激光法的PSD拟合参数与传统的密度计法及移液管法的PSD拟合参数间的相关关系。 |
| 英文摘要: |
| Granulometric composition of the soil has important applications in the naming of soil, identify, describe and predict soil engineering properties. In order to study methods of measurement of unsaturated soil composition and particle size measurements, density meter method were used in this article, the pipette method and laser particle size analyzer method Hefei nine kinds of unsaturated expansive soil particle size measurements were obtained corresponding grain size distribution, and using a curve fitting model Fredlund, the particle size distribution curve obtained the test soil (PSD), to obtain a mean value of the corresponding curve fitting parameters are the variance and coefficient of variation. On this basis, the three kinds of measurement methods PSD curve fitting parameter regression analysis method to obtain a fit parameter PSD laser densitometer and the traditional method and the method PSD pipette fitting relationship between the parameters . |
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