纳米石墨粉红黏土强度影响因素敏感性试验研究

张雨昕; 白汉营; 高宇豪; 龚乐宗; 马嘉辉

doi:10.13544/j.cnki.jeg.2018190

纳米石墨粉红黏土强度影响因素敏感性试验研究

doi: 10.13544/j.cnki.jeg.2018190

1.
桂林理工大学, 地球科学学院桂林 541004;
2.
桂林理工大学, 地质资源与地质工程博士后流动站桂林 541004;
3.
桂林理工大学, 广西隐伏金属矿产勘查重点实验室桂林 541004

基金项目:

国家自然科学基金项目（41762022），广西高校中青年教师基础能力提升项目（2018KY0265），广西大学生创新创业训练计划项目（201710596088），桂林理工大学博士（后）启动基金项目资助

详细信息

作者简介:
张雨昕(1996-),女,本科生,地质工程专业.Email:956697285@qq.com

通讯作者:
白汉营(1978-),男,博士,工程师,主要从事工程地质、灾害地质和环境岩土工程教学和研究工作.Email:baihylh@glut.edu.cn

中图分类号: TU411.3
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- 被引次数: 0
出版历程
- 收稿日期: 2018-06-01
- 修回日期: 2018-08-01
- 刊出日期: 2018-10-31

SENSITIVITY EXPERIMENTAL STUDY ON THE INFLUENCING FACTORS OF NANO-GRAPHITE RED CLAY STRENGTH

1.
Guilin University of Technology, Guilin 541004;
2.
Postdoctoral Research Station of Geological Resources and Geological Engineering, Guilin University of Technology, Guilin 541004;
3.
Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, Guilin 541004

摘要

摘要: 针对改性红黏土众多强度影响因素的敏感性，设计了不同含水率条件下各梯度掺量纳米石墨粉的红黏土不固结不排水三轴试验，结合SPSS多因素回归分析和MATLAB数据拟合得到强度与各因素之间的数学模型，通过电镜扫描试验，探讨分析纳米石墨粉掺量对区域红黏土微观结构的影响。结果表明：适量的纳米石墨粉对提高红黏土力学强度有明显的作用，其掺量比是影响区域红黏土强度的最敏感因素；由抗剪强度和黏聚力随着掺量比的拟合曲线建立的数学模型表明，抗剪强度和黏聚力c随着纳米石墨粉的增加呈现先增加后减少的特征，而内摩擦角基本不变。纳米石墨粉掺量不同程度地改变了红黏土的微观结构，致使其土样表面颗粒的结构由疏松状态逐渐向致密状态过渡，最终改变了红黏土的强度性能。
- 纳米石墨粉红黏土 /
- 影响因素 /
- 多因素分析 /
- 掺量比
Abstract: Aiming at the sensitivity of modified red clay to many strength factors, the unconsolidated and undrained triaxial test of red clay with various gradients of nano-graphite powder under different moisture contents was designed, combining SPSS multiple regression analysis and MATLAB data fitting, which obtain the mathematical model between intensity and various factors. Analyzing the effect of nano-graphite content on the microstructure of regional red clay with SEM method. The results show that:The appropriate amount of nano-graphite powder has a significant effect on improving the mechanical strength of red clay, and its addition ratio is the most sensitive factor affecting the strength of regional red clay. The mathematical model established by the fitting curve of shear strength and cohesive force with the addition ratio shows that the shear strength and cohesive force c increase first and then decrease with the increase of nano graphite powder,while the internal friction angle is basically the same. The content of nano-graphite changed the microstructure of red clay to varying degrees, resulting in a gradual transition from a loose state to a dense state on the surface of the soil surface particles, which ultimately changed the strength properties of red clay.
- Nano-graphite red clay /
- Influencing factors /
- Multivariate analysis /
- Addition ratio

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