兰州新区黄土微观参数与剪切强度C、φ关联拟合分析
作者:
作者单位:

作者简介:

通讯作者:

基金项目:

国家自然科学基金(51578518)


Relationship Between Microscopic Parameters and Shear Strength C, φ of Loess in Lanzhou New District
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    通过兰州新区同场地原状黄土(典型低黏性粉土)直剪试验和高倍电子显微镜及能谱试验,分析获取黄土内聚力C及内摩擦角φ值,以及矿物元素比值(Fe/Si、Al/Si、K/Al)以及微观结构参数(颗粒长轴,长轴的偏度,峰度,定向度,磨圆系数)等数据。采用单因素及多元回归拟合法分析土样的微观参数以及矿物元素比值与抗剪强度(C,φ值)的关联性。研究结果表明,φ值与角度均值线性相关,拟合公式相关系数0.82。内聚力C值与长轴峰度、长轴偏度、Fe/Si、Al/Si、K/Al线性相关,拟合后相关系数最大0.99。微观参数与抗剪强度拟合公式可为预测土样抗剪强度提供新的研究方法。

    Abstract:

    In this study, we conducted a direct shear test of undisturbed loess (typical low clay silt) in the Lanzhou new district, used high-power electron microscopy, and conducted an energy spectrum test to obtain the cohesion C, internal friction angle φ, mineral element ratio, and micro structural parameters of the loess. We then analyzed the correlation among the microcosmic parameters, the mineral element ratio, and the shear strength (C, φ) of the soil samples by a single-factor and multiple regression fitting method. The results indicate that the φ value has a linear correlation with the mean angle value, and the correlation coefficient of the fitting formula is 0.82. The cohesion C value is linearly correlated with the kurtosis and skewness of the long axis, Fe/Si, Al/Si, and K/Al, and the maximum correlation coefficient after fitting is 0.99. The fitting formula for the microcosmic parameters and shear strength provide a new research approach for predicting the shear strength of soil samples.

    参考文献
    相似文献
    引证文献
引用本文

粟华忠,和法国,邓津,吕燃.兰州新区黄土微观参数与剪切强度C、φ关联拟合分析[J].地震工程学报,2020,42(2):521-528. SU Huazhong, HE Faguo, DENG Jin, Lü Ran. Relationship Between Microscopic Parameters and Shear Strength C, φ of Loess in Lanzhou New District[J]. China Earthquake Engineering Journal,2020,42(2):521-528.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
历史
  • 收稿日期:2020-01-15
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2020-04-28